CN109852222A - A kind of fire protection flame retarding molding sand face aqueous polyurethane finishing coat and preparation method thereof - Google Patents
A kind of fire protection flame retarding molding sand face aqueous polyurethane finishing coat and preparation method thereof Download PDFInfo
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- CN109852222A CN109852222A CN201910038679.6A CN201910038679A CN109852222A CN 109852222 A CN109852222 A CN 109852222A CN 201910038679 A CN201910038679 A CN 201910038679A CN 109852222 A CN109852222 A CN 109852222A
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Abstract
The present invention proposes a kind of fire protection flame retarding molding sand face aqueous polyurethane finishing coat, mian paint spells halogen-free flameproof waterborne polyurethane resin as matrix resin using water soluble acrylic acid dispersion hydroxy resin, add the fire proofing and sand flour and aqueous wax powder that nano-titanium dioxide, nano-zinc borate, magnesium hydroxide, aluminium hydroxide and calcined kaolin compound；Curing agent is compounded using hydrophilic aliphatic polyisocyanate with lipophilic aliphatic polymeric isocyanate, propylene-glycol diacetate；The equivalent molar ratio of-OH the functional group in-NCO functional group and curing agent in mian paint is 1.2~1.3.The present invention also proposes the preparation method of the fire protection flame retarding molding sand face aqueous polyurethane finishing coat, paint film of the invention has brilliant fire retardant performance, hardness is high, wearability is excellent, scratch resistance is strong, good weatherability, and there is beautiful paint film sand face effect, it can be widely applied to the external coating of rail traffic vehicles car body, built-in, chassis, framework and various accessories.
Description
Technical field
The present invention relates to aqueous polyurethane coating field more particularly to a kind of fire protection flame retarding molding sand face aqueous polyurethane finishing coats
And preparation method thereof, especially a kind of rail traffic vehicles fire protection flame retarding molding sand face aqueous polyurethane finishing coat and its preparation side
Method.
Background technique
With the continuous improvement of economic fast development and living standards of the people, rail traffic development is at full speed and has become not
Carry out the major fields of several years infrastructure construction in chinies investment.It, will be following several according to Ministry of Railways's Mid-term and Long-term Plan of the Railway Network
Year puts into many trillion fund and is used for railway and equipment build-up, including more than 20,000 the km new railway network and more than 7000 km High-speed Railway Networks.
Inter-city passenger rail, subway, light rail are also all flourishing.The accumulative mileage that puts into operation in the year two thousand twenty end is up to 7000km, and the year two thousand twenty is domestic
Intercity fare road total kilometrage is up to 15000km or more, subway and intercity vehicle aggregate demand more than 32000.
Rail traffic have the characteristics that freight volume is big, speed is fast, safety, on schedule, protection environment, energy saving and land used, packet
High-speed rail, motor-car, subway, light rail, tramcar etc. are included, is that China is with fastest developing speed in the world, there is independent intellectual property right, core
One of strongest project of competitiveness.The rapid growth of rail traffic will be driven to it and provide the industrial chains such as protection and decorative paint
Development, coating and application techniques used are also the highest type of technical requirements in industrial coating.
Currently, coating used in China's rail traffic vehicles coating is almost solvent type.Traditional solvent type coating makes
With a large amount of organic solvent has inevitably been used in the process, spray painting and baking process VOC emission account for entire Painting Shop
95% or more of VOC emission.These organic solvents are discharged into the atmosphere, and not only cause great damage to operator, but also
It pollutes the environment, increases the risk that fire and explosion occur for construction site, cause the waste of the energy and resource.
Water paint, without containing solvents such as benzene,toluene,xylene, formaldehyde, is free of free TDI using water as decentralized medium
Equal toxic heavy metals, considerably reduce the discharge of VOC, are harmless Environmentally friendly coatings, will become future
The Main way of rail traffic coating industry development, has good market prospects, Social benefit and economic benefit is significant.
Finishing coat is the final coating of coating, it embodies the final overall effect of rail traffic vehicles.Therefore, finishing coat is necessary
The function of decoration and protection is had both, vehicle when various regions are run, want that various harsh climate environment can be resisted for a long time by coating, also
Good appearance can be kept for a long time.
Summary of the invention
Beautiful for the low-carbon environment-friendly of solution coating used for rail vehicle, fire protection flame retarding, excellent combination property and decorative effect
Technical problem, the present invention provide a kind of fire protection flame retarding molding sand face aqueous polyurethane finishing coat and preparation method thereof, and paint film has Zhuo
Fire retardant performance more, hardness is high, wearability is excellent, scratch resistance is strong, good weatherability, and has beautiful paint film sand face effect
Fruit, easy for construction, health environment-friendly can be widely applied to rail traffic vehicles car body, built-in, chassis, framework and various accessories
External coating.Concrete scheme is as follows:
The present invention proposes a kind of fire protection flame retarding molding sand face aqueous polyurethane finishing coat, by mass percentage includes following components:
Component A
Wherein the sum of weight percent of component A is absolutely；
B component
Hydrophilic aliphatic polyisocyanate 35.0%~45.0%
Lipophilic aliphatic polymeric isocyanate 30.0%~42.0%
Propylene-glycol diacetate 18.0%~30.0%
Wherein the sum of mass percent of B component is absolutely；
Component A is mixed with B component according to the NCO/OH equivalent proportion of n (- NCO): n (- OH)=1.2~1.3, i.e. A group
The equivalent molar ratio of-OH the functional group in-NCO functional group and B component in point is 1.2~1.3.
Preferably, the sand flour include partial size be 8-10 μm sand flour, partial size be 27-35 μm sand flour, partial size
For one of 65-75 μm sand flour, two or three.
Preferably, the aqueous wax powder is polytetrafluoroethylmodified modified micro mist wax, and particle size range is 2-30 μm, molecular weight point
Cloth is 600-6000.
Preferably, additive described in the component A includes 0.2%~0.4% defoaming agent by mass percentage,
0.3%~0.5% dispersing agent, 0.1%~0.3% wetting agent, 0.1%~0.3% levelling agent, 0.2%~0.4%
Thickener.
Preferably, the mass ratio of the hydrophilic aliphatic isocyanates and lipophilic aliphatic isocyanates is=1:
0.8~1.0.
The present invention also proposes a kind of preparation method of above-mentioned fire protection flame retarding molding sand face aqueous polyurethane finishing coat, including following
Step:
The preparation of S1, component A
S1.1, water, water soluble acrylic acid dispersion hydroxy resin, halogen-free flameproof water is added by mass percentage in dispersion cylinder
Property polyurethane resin, and carry out middling speed dispersion；
S1.2, nano-titanium dioxide, nano-zinc borate, magnesium hydroxide, aluminium hydroxide, calcined kaolin, sand are slowly added to
Flour and aqueous wax powder are added with water and rinse casing wall, and high speed dispersion 20~50 minutes to fineness≤40 micron up to component A；
The preparation of S2, B component
Hydrophilic aliphatic polyisocyanate, lipophilic aliphatic poly isocyanic acid is added by weight percentage in dispersion cylinder
Ester, propylene-glycol diacetate, middling speed are dispersed 20~30 minutes, are filtered up to B component；
The preparation of S3, aqueous polyurethane finishing coat
The B component of component A and step S2 preparation prepared by step S1 is according to n (- NCO): n's (- OH)=1.2~1.3
NCO/OH equivalent proportion is uniformly mixed, and 15min is stood.
Further, it also needs that defoaming agent, dispersing agent and wetting agent is added before the middling speed scatter operation in step S1.1.
Further, after the dispersion of step S1.2 high speed, levelling agent and thickener, middling speed is added under low dispersion revolving speed in
Dispersion 20~40 minutes.
Further, the speed of middling speed dispersion is 600~800r/min, it is described in low dispersion speed be 400~
600r/min, the speed of the high speed dispersion are 1000~1500r/min.
Further, the component A fineness of step S1 preparation is 15~40um, and viscosity is 60~100s.
Formulation principle of the invention is as follows:
(1) component A of the invention (mian paint) is with halogen-free flameproof aqueous polyurethane dispersion and hydroxy functional groups polypropylene
Acids dispersion is blending components matrix resin, has both taken full advantage of dihydroxypropyl resin in rate of drying, weather-proof
Property, adhesive force, manufacturing cost etc. strong point, and effectively play the flexible of halogen-free flameproof waterborne polyurethane resin advantage
The advantages such as property, impact resistance, the high richness of coating, fire protection flame retarding, environmentally protective determine two kinds of matrix trees by formulation optimization
Optimal proportion of the rouge in dual-component aqueous polyurethane finishing coat hydroxy component fundamentally guarantees that rail traffic vehicles are gathered with aqueous
The physicochemical property and fireproof flame-retardant effect of urethane finishing coat brilliance.
(2) B component of the invention (curing agent) is poly- with the hydrophilic aliphatic based on hexamethylene diisocyanate (HDI)
Isocyanates is curing agent component with the low viscosity aliphatic polymeric isocyanate resin containing hexamethylene diisocyanate (HDI),
By formulation optimization, determine that optimal in dual-component aqueous polyurethane industrial coating curing agent component of two kinds of polyisocyanate is matched
Than enhancing aqueous polyurethane finishing coat while hardness, scratch resistance and the adhesive force for improving dual-component aqueous polyurethane film
Weather resistance.
(3) as NCO/OH ratio increases, i.e., as curing agent content increases, hardness of film increases, adhesive force improves；And
The curing agent of lower content is conducive to the shortening of surface drying time, the extension of working life and the improvement of appearance of film.Comprehensively consider
NCO/OH matches influence of the size to various aspects, in waterborne two-component polyurethane coating product system of the present invention, optimization
NCO/OH equivalent proportion is 1.2~1.3, does speed, hardness, scratch resistance, wearability and chemical-resistant, weather-proof to obtain paint film
Optimum balance.
(4) present invention is creatively proposed with nano boric acid zinc flame retardant and magnesium hydroxide, aluminium hydroxide, calcining kaolinite
The inorganic nano fire-retardant fireproof technology of soil, nano-titanium dioxide composition, successfully realizes fire protection flame retarding functional promotion and noxious material
Running water is perfectly combined.
In traditional fireproof coating, usually using amine, halogen based flame retardant.The fire retardant of this two major classes type is imitated
Fruit is good, but smoke amount is big, is also easy to produce the toxic and harmful gas such as hydrogen halides.Product of the present invention avoids fire-retardant with halogen to amine
The use of agent is creatively proposed with nano boric acid zinc flame retardant and magnesium hydroxide, aluminium hydroxide, calcined kaolin, nanometer
The inorganic nano fire-retardant fireproof technology of the compositions such as titanium dioxide.
The inorganic addition type environmental protection fire retarding agent of flame retardant of magnesium hydroxide system has fire-retardant, smoke elimination, anti-dripping melt, filling etc. multiple
Performance, thermal stability is high, and has the efficient substrate that promotees at charcoal effect and strong acid scavenging capacity.
Aluminium hydroxide is also known as water and aluminium oxide, is a kind of white alkalescent powder, it is big that it decomposes generation at a certain temperature
Moisture is measured, thus there is good flame retardant property, is a kind of inorganic environment-friendly fire retardant.Aluminium hydroxide can also eliminate organic matter because of combustion
The molten drop and toxic gas for burning and generating have fire-retardant, smoke elimination, anti-dropping triple function.
Nano boric acid zinc flame retardant is a kind of novel environment friendly flame retardant, meets EU criteria.Silane is passed through on its surface
Modification, high, the dispersed compatibility of whiteness is good, is applied to flame-retardant system instead of toxic antimony oxide, has preferable
Independent flame retardant efficiency can also cooperate with use with aluminium hydroxide, flame retardant of magnesium hydroxide, increase the flame retardant property of coating system.
Calcined kaolin is to carry out calcining heat treatment to kaolin under the conditions of certain temperature and obtain, so that kaolin table
The hydroxyl partially or in whole in face is taken off, to obtain special physicochemical property, such as with preferable fire resistance, higher
Whiteness and dispersibility etc..
Nano-titanium dioxide has excellent chemical stability, thermal stability and superpower covering power, anti-uv-ray
By force, the good dispersion in aqueous coating system.
The characteristic of present invention combination nano-zinc borate and magnesium hydroxide, aluminium hydroxide, calcined kaolin, nano-titanium dioxide
Optimize the percentage composition of each component in formula, forms inorganic nano fire-retardant fireproof technical effect, can successfully realize fire protection flame retarding
Effective control of the promotion of function and noxious material limitation.
(5) sand flour is creatively introduced into rail traffic vehicles aqueous polyurethane finishing coat by the present invention, and to various
The different sand flour of average grain diameter is compounded, and by the optimal dose of optimization experimental verification sand starch material, it is special to obtain
Fine sand line, middle sand streak or the coarse sand line aqueous polyurethane finishing coat of texture feel and visual effect and different surfaces fineness.
Tested by formulation optimization, the research of the invention finds that, when sand flour in formula weight percent be 6.0%~
When 8.0%, ideal sand streak effect can be obtained, while significantly improving scratch resistance, wear resistence and the paint film table of paint film
Surface hardness, heat resistance and chemical-resistant.The fineness of surface of the paint film sand streak, then can be by selecting three kinds of different-grain diameters
One of sand flour, two or three, and then the weight percent of various sand flour is adjusted to obtain satisfied thickness sand streak
Effect.
(6) aqueous wax powder of the invention is polytetrafluoroethylmodified modified micro mist wax, passes through matching in aqueous polyurethane finishing coat
Fang Youhua determines optimum addn amount, improves wearability, damage resistant, resistance to blocking and the hydrophobic pollution resistance of finishing coat paint film.
Micro mist wax is super-fine powder, and particle size range is 2-30 μm, and molecular weight distribution is wider, from 600-6000 or so, is used
Way is extensively.This is a kind of polytetrafluoroethylene (PTFE) resulting high-quality modification micro mist wax modified to polyethylene wax；By modification, improve
The softening point and hardness of polyethylene wax, while overcoming the disadvantages of polytetrafluoroethylwax wax is not easy to disperse, price is higher.By the modification
Micro mist wax introduces double-component waterborne polyurethane finishing coat, by formulation optimization, determines that the optimum addn amount of micro mist wax in formula is
When 0.3%~0.5% (mass percent), can farthest improve the wearability of finishing coat paint film, damage resistant, resistance to blocking with
Hydrophobic pollution resistance.
The invention has the benefit that
(1) product of the present invention has acquirement important breakthrough in terms of fire retardant performance, meets People's Republic of China's railway
Professional standard " TB/T 3237-2010 EMU built-in material flame-retarded technology condition " requirement.Wherein, oxygen index (OI) ﹥ 50%, combustion
Burning property reaches A grades, and smoke density and smoke toxicity are qualification.
(2) product of the present invention is the water paint product of health environment-friendly, meets People's Republic of China's railroad industry standard
" TBT_3139-2006 rolling stock air limits of harmful substances " requirement.Benzene,toluene,xylene, free first in product of the present invention
The content of beary metal such as phenylene diisocyanate (TDT) and dissoluble lead, soluble cadmium, soluble chromium, soluble mercury, are " not
It detects (ND) ".
(3) product of the present invention has carried out stringent control in terms of content of volatile organic compound (VOC), obtains weight
Quantum jump.Product reaches People's Republic of China's national environmental protection protective standard, and " HJ 2537-2014 environmental labelling product technology is wanted
Seek water paint " strict demand (index value be≤80g/L) for VOC index, the testing result of product of the present invention VOC≤
23g/L。
(4) product of the present invention has excellent chemical resistance, including water-fast (40 ± 1 DEG C, 48 hours), resistance to 3% (matter
Measure percentage) sulfuric acid 2 hours, the sodium hydroxide 2 hours of resistance to 2% (mass percent), resistance to 5% (mass percent) acetic acid
2 hours, after the experiments test such as the wipe test of resistance to butanone (reciprocal wiping 50 times), film is substantially unchanged, reaches Chinese Railway
Parent company's company standard " Q/CR581-2017 Railroad train coatings technical conditions standard " requirement.
(5) product of the present invention itself has excellent an impact resistance and bending resistance, higher hardness of paint film with it is relatively strong
Paint film adhesion, wherein impact resistance >=50cm (according to GB/T1732-1993 standard testing), bending resistance≤2mm (according to
According to GB/T6742-2007 standard testing), hardness of paint film >=H (according to GB/T6739-2006 standard testing), adhesive force≤1 grade
(according to GB/T9286-1998 standard testing).
(6) product of the present invention has weatherability outstanding.It provides, carries out resistance to artificial old according to GB/T14522-2008 standard
Change acceleration test (1000 hours, exposure cycles type 7), and comprehensive according to decorative paint film in GB/T1766-2008 standard
Ageing properties grade is evaluated, inspection result≤1 grade, far superior to 2 grades of value up to standard of technical requirements index (≤2 grades).
Specific embodiment
A kind of fire protection flame retarding molding sand face aqueous polyurethane finishing coat includes following components by mass percentage:
Component A
Wherein the sum of weight percent of component A is absolutely.
B component
Hydrophilic aliphatic polyisocyanate 35.0%~45.0%
Lipophilic aliphatic polymeric isocyanate 30.0%~42.0%
Propylene-glycol diacetate 18.0%~30.0%
Wherein the sum of mass percent of B component is absolutely and the hydrophilic aliphatic isocyanates and oleophylic
Property aliphatic isocyanates mass ratio be=1:0.8~1.0.
Component A is mixed with B component according to the NCO/OH equivalent proportion of n (- NCO): n (- OH)=1.2~1.3, i.e. A group
The equivalent molar ratio of-OH the functional group in-NCO functional group and B component in point is 1.2~1.3.
Wherein:
The water soluble acrylic acid dispersion hydroxy resin selects Cohan wound polymer (China) Co., Ltd to provideA 2470 is as one of hydroxy-containing resin component matrix resin.A2470 is a kind of
The polyacrylic acid water-borne dispersions of hydroxy functional groups, which can mix with aliphatic polymeric isocyanate makes
With the finishing coat of high glaze being made, such coating can drying at room temperature or force drying (such as under the conditions of 80 DEG C).Paint after solidification
Film hardness is high, and has outstanding solvent resistance, water resistance and weatherability.
The PU2211 halogen-free flameproof water that the halogen-free flameproof waterborne polyurethane resin selects the auxiliary reagent factory Zhong Fang, Taixing City to produce
Property polyurethane resin as matrix resin another in hydroxy-containing resin component.This is a kind of aliphatic flame-retardant polyurethane water
Dispersion is halogen-free, and is formed a film flexible, rich in gloss, is suitable for the substrates such as glass reinforced plastic, metal, Carbon fibe, plastic cement, textile
Fire-retardant composite coating.Dispersions of polyurethanes resin film forming high resilience, transparency is good, and tensile strength is high, is free of APEO, first
The fire proofing of aldehyde and addition type is free of more bromobenzene ethers, is free of heavy metal, meets REACH and ROHS environmental protection standard.
The embodiment of the present invention with2470 polyacrylic acid water-borne dispersions hydroxy resin of A and PU2211
Halogen-free flameproof waterborne polyurethane resin is blending components matrix resin, has both taken full advantage of dihydroxypropyl resin in drying
The strong point of speed, weatherability, adhesive force, manufacturing cost etc., but it is excellent effectively to play halogen-free flameproof waterborne polyurethane resin
The advantages such as the high richness of the flexibility of gesture, impact resistance, coating, fire protection flame retarding, environmentally protective fundamentally ensure aqueous poly-
The brilliance of urethane finishing coat performance.
The hydrophilic aliphatic polyisocyanate and lipophilic aliphatic polymeric isocyanate select Cohan wound polymer (in
State) Co., Ltd provide Bayhydur XP 2655 and Desmodur N 3900, as blending polyisocyanate component.
Bayhydur XP 2655 is the sulfonate modified HDI trimer of the Cohan wound third generation, it is a kind of different based on hexa-methylene two
The hydrophilic aliphatic polyisocyanate of cyanate (HDI) has the balance between moderate hydrophily and high functionality, uses
The aqueous polyurethane coating with bi component that Bayhydur XP 2655 is prepared has the characteristics that quick-drying, hardens quick, paint film
Final hardness height, good chemical resistance；Not needing cosolvent can be realized manual stirring, and more convenient operation is dispersed more evenly,
The compatibility of polyisocyanate curing agent and hydroxy component can be significantly improved.Desmodur N 3900 is then containing hexa-methylene two
The low viscosity aliphatic polymeric isocyanate resin of isocyanates (HDI) is a kind of lipophilic polyisocyanate haveing excellent performance, extensively
It is general to be used for weatherability coating system, such as car repair, rail traffic, plasthetics field.
The quality of the nano boric acid zinc flame retardant, magnesium hydroxide, aluminium hydroxide, calcined kaolin and nano-titanium dioxide
Than are as follows: (10~15): (25~35): (20~30): (8~12): (20~30).
The sand flour include partial size be 8-10 μm sand flour, partial size be 27-35 μm sand flour, partial size be 65-75 μ
One of sand flour of m, two or three.Specially 3 kinds of differences of Dongguan City Long Hai new material Science and Technology Ltd. offer
Sand flour 3710#, 377#, 382# of fineness, the sand flour are a kind of specially treated high molecular weight modified waxes, are resistant to temperature
150 DEG C or more, have the characteristics that smooth feel, not needle-holding hand, heat-resisting, chemical property is stable, UV resistant, solvent resistant, partial size is equal
It is even, easily disperse, good with resin compatible, aqueous, oiliness can be used.
The aqueous wax powder is polytetrafluoroethylmodified modified micro mist wax, and particle size range is 2-30 μm, and molecular weight distribution is
600-6000.The specially high-quality aqueous wax powder of 2382# type of Chemical Co., Ltd., Longhai City, Jiangxi Province production.This is a kind of polytetrafluoro
Ethylene is to the modified micro mist wax of the modified resulting high-quality of polyethylene wax；By modification, the softening point of polyethylene wax and hard is improved
Degree, while overcoming the disadvantages of polytetrafluoroethylwax wax is not easy to disperse, price is higher.
A kind of preparation method of above-mentioned fire protection flame retarding molding sand face aqueous polyurethane finishing coat, comprising the following steps:
The preparation of S1, component A
S1.1, water, water soluble acrylic acid dispersion hydroxy resin, halogen-free flameproof water is added by mass percentage in dispersion cylinder
Property polyurethane resin, defoaming agent, dispersing agent and wetting agent, and carry out middling speed dispersion, the speed of middling speed dispersion is 600~800r/
min；
S1.2, nano-titanium dioxide, nano-zinc borate, magnesium hydroxide, aluminium hydroxide, calcined kaolin, sand are slowly added to
Flour and aqueous wax powder are added with water and rinse casing wall, and to fineness≤40 micron, low dispersion turns high speed dispersion within 20~50 minutes
Speed is lower to be added levelling agent, thickener, preservative and mould inhibitor, it is described in the speed of low dispersion be 400~600r/min, Zhi Houzhong
Speed dispersion 20~40 minutes, the speed of the high speed dispersion are 1000~1500r/min, sample detection finish fineness and viscosity,
Up to component A when if finish fineness reaches 15~40u m, viscosity is 60~100s.
The preparation of S2, B component
Hydrophilic aliphatic polyisocyanate, lipophilic aliphatic poly isocyanic acid is added by weight percentage in dispersion cylinder
Ester, propylene-glycol diacetate, middling speed are dispersed 20~30 minutes, are filtered and packaged up to B component.
The preparation of S3, aqueous polyurethane finishing coat
The B component of component A and step S2 preparation prepared by step S1 is according to n (- NCO): n's (- OH)=1.2~1.3
NCO/OH equivalent proportion is uniformly mixed, and 15min is stood.
As follows in conjunction with specific embodiments, application scheme is further described:
Embodiment one
A kind of fire protection flame retarding molding sand face aqueous polyurethane finishing coat includes following components by mass percentage:
Component A (mian paint)
B component (curing agent)
Hydrophilic aliphatic polyisocyanate 40.0%
Lipophilic aliphatic polymeric isocyanate 36.0%
Propylene-glycol diacetate 24.0%
Component A (mian paint) is with B component (curing agent) according to the NCO/OH equivalent proportion of n (- NCO): n (- OH)=1.2~1.3
It is mixed, i.e., the equivalent molar ratio of-NCO functional group in component A and the-OH functional group in B component is 1.2~1.3.
A kind of preparation method of above-mentioned fire protection flame retarding molding sand face aqueous polyurethane finishing coat, comprising the following steps:
The preparation of S1, component A
S1.1, water, water soluble acrylic acid dispersion hydroxy resin, halogen-free flameproof water is added by mass percentage in dispersion cylinder
Property polyurethane resin, defoaming agent, dispersing agent and wetting agent, and carry out middling speed dispersion, the speed of middling speed dispersion is 600~800r/
min；
S1.2, nano-titanium dioxide, nano-zinc borate, magnesium hydroxide, aluminium hydroxide, calcined kaolin, sand are slowly added to
Flour and aqueous wax powder are added with water and rinse casing wall, and to fineness≤40 micron, low dispersion turns high speed dispersion within 20~50 minutes
Speed is lower to be added levelling agent, thickener, preservative and mould inhibitor, it is described in the speed of low dispersion be 400~600r/min, Zhi Houzhong
Speed dispersion 20~40 minutes, the speed of the high speed dispersion are 1000~1500r/min, sample detection finish fineness and viscosity,
Up to component A when if finish fineness reaches 15~40u m, viscosity is 60~100s.
The preparation of S2, B component
Hydrophilic aliphatic polyisocyanate, lipophilic aliphatic poly isocyanic acid is added by weight percentage in dispersion cylinder
Ester, propylene-glycol diacetate, middling speed are dispersed 20~30 minutes, are filtered and packaged up to B component.
The preparation of S3, aqueous polyurethane finishing coat
The B component of component A and step S2 preparation prepared by step S1 is according to n (- NCO): n's (- OH)=1.2~1.3
NCO/OH equivalent proportion is uniformly mixed, and 15min is stood.
Aqueous polyurethane face obtained above is detected, testing result are as follows:
1) fire retardant performance meets People's Republic of China's railroad industry standard " in TB/T 3237-2010 EMU use
Package material flame-retarded technology condition " it requires, wherein oxygen index (OI) ﹥ 50%, flammability reach A grades, and smoke density and smoke toxicity are qualification.
2) benzene,toluene,xylene, free toluene diisocyanate (TDT) and dissoluble lead, soluble cadmium, solubility in product
The content of beary metal such as chromium, soluble mercury are " (ND) is not detected ".3) VOC is 18g/L in product.4) product of the present invention is distinguished
By water-fast (40 ± 1 DEG C, 48 hours), the sulfuric acid 2 hours of resistance to 3% (mass percent), resistance to 2% (mass percent) hydrogen-oxygen
Change the experiments tests such as sodium 2 hours, the acetic acid 2 hours of resistance to 5% (mass percent), the wipe test of resistance to butanone (reciprocal wiping 50 times)
Later, film is substantially unchanged.5) product impact resistance is 53cm (according to GB/T1732-1993 standard testing), counter-bending
Performance is 2mm (according to GB/T6742-2007 standard testing), and hardness of paint film is H (according to GB/T6739-2006 standard testing),
Adhesive force is 1 grade (according to GB/T9286-1998 standard testing).6) product by artificial ageing acceleration test (1000 hours,
Exposure cycles type 7), and evaluated by the comprehensive ageing properties grade of decorative paint film in GB/T1766-2008 standard, it examines
It as a result is 1 grade.
Embodiment two
A kind of fire protection flame retarding molding sand face aqueous polyurethane finishing coat includes following components by mass percentage:
Component A (mian paint)
B component (curing agent)
Hydrophilic aliphatic polyisocyanate 42.0%
Lipophilic aliphatic polymeric isocyanate 35.0%
Propylene-glycol diacetate 23.0%
Component A (mian paint) is with B component (curing agent) according to the NCO/OH equivalent proportion of n (- NCO): n (- OH)=1.2~1.3
It is mixed, i.e., the equivalent molar ratio of-NCO functional group in component A and the-OH functional group in B component is 1.2~1.3.
A kind of preparation method of above-mentioned fire protection flame retarding molding sand face aqueous polyurethane finishing coat, comprising the following steps:
The preparation of S1, component A
S1.1, water, water soluble acrylic acid dispersion hydroxy resin, halogen-free flameproof water is added by mass percentage in dispersion cylinder
Property polyurethane resin, defoaming agent, dispersing agent and wetting agent, and carry out middling speed dispersion, the speed of middling speed dispersion is 600~800r/
min；
S1.2, nano-titanium dioxide, nano-zinc borate, magnesium hydroxide, aluminium hydroxide, calcined kaolin, sand are slowly added to
Flour and aqueous wax powder are added with water and rinse casing wall, and to fineness≤40 micron, low dispersion turns high speed dispersion within 20~50 minutes
Speed is lower to be added levelling agent, thickener, preservative and mould inhibitor, it is described in the speed of low dispersion be 400~600r/min, Zhi Houzhong
Speed dispersion 20~40 minutes, the speed of the high speed dispersion are 1000~1500r/min, sample detection finish fineness and viscosity,
Up to component A when if finish fineness reaches 15~40u m, viscosity is 60~100s.
The preparation of S2, B component
Hydrophilic aliphatic polyisocyanate, lipophilic aliphatic poly isocyanic acid is added by weight percentage in dispersion cylinder
Ester, propylene-glycol diacetate, middling speed are dispersed 20~30 minutes, are filtered and packaged up to B component.
The preparation of S3, aqueous polyurethane finishing coat
The B component of component A and step S2 preparation prepared by step S1 is according to n (- NCO): n's (- OH)=1.2~1.3
NCO/OH equivalent proportion is uniformly mixed, and 15min is stood.
Aqueous polyurethane face obtained above is detected, testing result are as follows:
1) fire retardant performance meets People's Republic of China's railroad industry standard " in TB/T 3237-2010 EMU use
Package material flame-retarded technology condition " it requires, wherein oxygen index (OI) ﹥ 50%, flammability reach A grades, and smoke density and smoke toxicity are qualification.
2) benzene,toluene,xylene, free toluene diisocyanate (TDT) and dissoluble lead, soluble cadmium, solubility in product
The content of beary metal such as chromium, soluble mercury are " (ND) is not detected ".3) VOC is 19g/L in product.4) product of the present invention is distinguished
By water-fast (40 ± 1 DEG C, 48 hours), the sulfuric acid 2 hours of resistance to 3% (mass percent), resistance to 2% (mass percent) hydrogen-oxygen
Change the experiments tests such as sodium 2 hours, the acetic acid 2 hours of resistance to 5% (mass percent), the wipe test of resistance to butanone (reciprocal wiping 50 times)
Later, film is substantially unchanged.5) product impact resistance is 50cm (according to GB/T1732-1993 standard testing), counter-bending
Performance is 2mm (according to GB/T6742-2007 standard testing), and hardness of paint film is H (according to GB/T6739-2006 standard testing),
Adhesive force is 1 grade (according to GB/T9286-1998 standard testing).6) product by artificial ageing acceleration test (1000 hours,
Exposure cycles type 7), and evaluated by the comprehensive ageing properties grade of decorative paint film in GB/T1766-2008 standard, it examines
It as a result is 1 grade.
Embodiment three
A kind of fire protection flame retarding molding sand face aqueous polyurethane finishing coat includes following components by mass percentage:
Component A (mian paint)
B component (curing agent)
Hydrophilic aliphatic polyisocyanate 38.0%
Lipophilic aliphatic polymeric isocyanate 38.0%
Propylene-glycol diacetate 24.0%
Component A (mian paint) is with B component (curing agent) according to the NCO/OH equivalent proportion of n (- NCO): n (- OH)=1.2~1.3
It is mixed, i.e., the equivalent molar ratio of-NCO functional group in component A and the-OH functional group in B component is 1.2~1.3.
A kind of preparation method of above-mentioned fire protection flame retarding molding sand face aqueous polyurethane finishing coat, comprising the following steps:
The preparation of S1, component A
S1.1, water, water soluble acrylic acid dispersion hydroxy resin, halogen-free flameproof water is added by mass percentage in dispersion cylinder
Property polyurethane resin, defoaming agent, dispersing agent and wetting agent, and carry out middling speed dispersion, the speed of middling speed dispersion is 600~800r/
min；
S1.2, nano-titanium dioxide, nano-zinc borate, magnesium hydroxide, aluminium hydroxide, calcined kaolin, sand are slowly added to
Flour and aqueous wax powder are added with water and rinse casing wall, and to fineness≤40 micron, low dispersion turns high speed dispersion within 20~50 minutes
Speed is lower to be added levelling agent, thickener, preservative and mould inhibitor, it is described in the speed of low dispersion be 400~600r/min, Zhi Houzhong
Speed dispersion 20~40 minutes, the speed of the high speed dispersion are 1000~1500r/min, sample detection finish fineness and viscosity,
Up to component A when if finish fineness reaches 15~40u m, viscosity is 60~100s.
The preparation of S2, B component
Hydrophilic aliphatic polyisocyanate, lipophilic aliphatic poly isocyanic acid is added by weight percentage in dispersion cylinder
Ester, propylene-glycol diacetate, middling speed are dispersed 20~30 minutes, are filtered and packaged up to B component.
The preparation of S3, aqueous polyurethane finishing coat
The B component of component A and step S2 preparation prepared by step S1 is according to n (- NCO): n's (- OH)=1.2~1.3
NCO/OH equivalent proportion is uniformly mixed, and 15min is stood.
Aqueous polyurethane face obtained above is detected, testing result are as follows:
1) fire retardant performance meets People's Republic of China's railroad industry standard " in TB/T 3237-2010 EMU use
Package material flame-retarded technology condition " it requires, wherein oxygen index (OI) ﹥ 50%, flammability reach A grades, and smoke density and smoke toxicity are qualification.
2) benzene,toluene,xylene, free toluene diisocyanate (TDT) and dissoluble lead, soluble cadmium, solubility in product
The content of beary metal such as chromium, soluble mercury are " (ND) is not detected ".3) VOC is 20g/L in product.4) product of the present invention is distinguished
By water-fast (40 ± 1 DEG C, 48 hours), the sulfuric acid 2 hours of resistance to 3% (mass percent), resistance to 2% (mass percent) hydrogen-oxygen
Change the experiments tests such as sodium 2 hours, the acetic acid 2 hours of resistance to 5% (mass percent), the wipe test of resistance to butanone (reciprocal wiping 50 times)
Later, film is substantially unchanged.5) product impact resistance is 55cm (according to GB/T1732-1993 standard testing), counter-bending
Performance is 2mm (according to GB/T6742-2007 standard testing), and hardness of paint film is H (according to GB/T6739-2006 standard testing),
Adhesive force is 0 grade (according to GB/T9286-1998 standard testing).6) product by artificial ageing acceleration test (1000 hours,
Exposure cycles type 7), and evaluated by the comprehensive ageing properties grade of decorative paint film in GB/T1766-2008 standard, it examines
It as a result is 1 grade.
Example IV
A kind of fire protection flame retarding molding sand face aqueous polyurethane finishing coat includes following components by mass percentage:
Component A (mian paint)
B component (curing agent)
Hydrophilic aliphatic polyisocyanate 44.0%
Lipophilic aliphatic polymeric isocyanate 36.0%
Propylene-glycol diacetate 20.0%
Component A (mian paint) is with B component (curing agent) according to the NCO/OH equivalent proportion of n (- NCO): n (- OH)=1.2~1.3
It is mixed, i.e., the equivalent molar ratio of-NCO functional group in component A and the-OH functional group in B component is 1.2~1.3.
A kind of preparation method of above-mentioned fire protection flame retarding molding sand face aqueous polyurethane finishing coat, comprising the following steps:
The preparation of S1, component A
S1.1, water, water soluble acrylic acid dispersion hydroxy resin, halogen-free flameproof water is added by mass percentage in dispersion cylinder
Property polyurethane resin, defoaming agent, dispersing agent and wetting agent, and carry out middling speed dispersion, the speed of middling speed dispersion is 600~800r/
min；
S1.2, nano-titanium dioxide, nano-zinc borate, magnesium hydroxide, aluminium hydroxide, calcined kaolin, sand are slowly added to
Flour and aqueous wax powder are added with water and rinse casing wall, and to fineness≤40 micron, low dispersion turns high speed dispersion within 20~50 minutes
Speed is lower to be added levelling agent, thickener, preservative and mould inhibitor, it is described in the speed of low dispersion be 400~600r/min, Zhi Houzhong
Speed dispersion 20~40 minutes, the speed of the high speed dispersion are 1000~1500r/min, sample detection finish fineness and viscosity,
Up to component A when if finish fineness reaches 15~40u m, viscosity is 60~100s.
The preparation of S2, B component
Hydrophilic aliphatic polyisocyanate, lipophilic aliphatic poly isocyanic acid is added by weight percentage in dispersion cylinder
Ester, propylene-glycol diacetate, middling speed are dispersed 20~30 minutes, are filtered and packaged up to B component.
The preparation of S3, aqueous polyurethane finishing coat
The B component of component A and step S2 preparation prepared by step S1 is according to n (- NCO): n's (- OH)=1.2~1.3
NCO/OH equivalent proportion is uniformly mixed, and 15min is stood.
Aqueous polyurethane face obtained above is detected, testing result are as follows:
1) fire retardant performance meets People's Republic of China's railroad industry standard " in TB/T 3237-2010 EMU use
Package material flame-retarded technology condition " it requires, wherein oxygen index (OI) ﹥ 50%, flammability reach A grades, and smoke density and smoke toxicity are qualification.
2) benzene,toluene,xylene, free toluene diisocyanate (TDT) and dissoluble lead, soluble cadmium, solubility in product
The content of beary metal such as chromium, soluble mercury are " (ND) is not detected ".3) VOC is 13g/L in product.4) product of the present invention is distinguished
By water-fast (40 ± 1 DEG C, 48 hours), the sulfuric acid 2 hours of resistance to 3% (mass percent), resistance to 2% (mass percent) hydrogen-oxygen
Change the experiments tests such as sodium 2 hours, the acetic acid 2 hours of resistance to 5% (mass percent), the wipe test of resistance to butanone (reciprocal wiping 50 times)
Later, film is substantially unchanged.5) product impact resistance is 52cm (according to GB/T1732-1993 standard testing), counter-bending
Performance is 2mm (according to GB/T6742-2007 standard testing), and hardness of paint film is 2H (according to GB/T6739-2006 standard testing),
Adhesive force is 1 grade (according to GB/T9286-1998 standard testing).6) product by artificial ageing acceleration test (1000 hours,
Exposure cycles type 7), and evaluated by the comprehensive ageing properties grade of decorative paint film in GB/T1766-2008 standard, it examines
It as a result is 1 grade.
Embodiment five
A kind of fire protection flame retarding molding sand face aqueous polyurethane finishing coat includes following components: component A (mian paint) by mass percentage
B component (curing agent)
Hydrophilic aliphatic polyisocyanate 40.0%
Lipophilic aliphatic polymeric isocyanate 40.0%
Propylene-glycol diacetate 20.0%
Component A (mian paint) is with B component (curing agent) according to the NCO/OH equivalent proportion of n (- NCO): n (- OH)=1.2~1.3
It is mixed, i.e., the equivalent molar ratio of-NCO functional group in component A and the-OH functional group in B component is 1.2~1.3.
A kind of preparation method of above-mentioned fire protection flame retarding molding sand face aqueous polyurethane finishing coat, comprising the following steps:
The preparation of S1, component A
S1.1, water, water soluble acrylic acid dispersion hydroxy resin, halogen-free flameproof water is added by mass percentage in dispersion cylinder
Property polyurethane resin, defoaming agent, dispersing agent and wetting agent, and carry out middling speed dispersion, the speed of middling speed dispersion is 600~800r/
min；
S1.2, nano-titanium dioxide, nano-zinc borate, magnesium hydroxide, aluminium hydroxide, calcined kaolin, sand are slowly added to
Flour and aqueous wax powder are added with water and rinse casing wall, and to fineness≤40 micron, low dispersion turns high speed dispersion within 20~50 minutes
Speed is lower to be added levelling agent, thickener, preservative and mould inhibitor, it is described in the speed of low dispersion be 400~600r/min, Zhi Houzhong
Speed dispersion 20~40 minutes, the speed of the high speed dispersion are 1000~1500r/min, sample detection finish fineness and viscosity,
Up to component A when if finish fineness reaches 15~40u m, viscosity is 60~100s.
The preparation of S2, B component
Hydrophilic aliphatic polyisocyanate, lipophilic aliphatic poly isocyanic acid is added by weight percentage in dispersion cylinder
Ester, propylene-glycol diacetate, middling speed are dispersed 20~30 minutes, are filtered and packaged up to B component.
The preparation of S3, aqueous polyurethane finishing coat
The B component of component A and step S2 preparation prepared by step S1 is according to n (- NCO): n's (- OH)=1.2~1.3
NCO/OH equivalent proportion is uniformly mixed, and 15min is stood.
Aqueous polyurethane face obtained above is detected, testing result are as follows:
1) fire retardant performance meets People's Republic of China's railroad industry standard " in TB/T 3237-2010 EMU use
Package material flame-retarded technology condition " it requires, wherein oxygen index (OI) ﹥ 50%, flammability reach A grades, and smoke density and smoke toxicity are qualification.
2) benzene,toluene,xylene, free toluene diisocyanate (TDT) and dissoluble lead, soluble cadmium, solubility in product
The content of beary metal such as chromium, soluble mercury are " (ND) is not detected ".3) VOC is 12g/L in product.4) product of the present invention is distinguished
By water-fast (40 ± 1 DEG C, 48 hours), the sulfuric acid 2 hours of resistance to 3% (mass percent), resistance to 2% (mass percent) hydrogen-oxygen
Change the experiments tests such as sodium 2 hours, the acetic acid 2 hours of resistance to 5% (mass percent), the wipe test of resistance to butanone (reciprocal wiping 50 times)
Later, film is substantially unchanged.5) product impact resistance is 56cm (according to GB/T1732-1993 standard testing), counter-bending
Performance is 2mm (according to GB/T6742-2007 standard testing), and hardness of paint film is H (according to GB/T6739-2006 standard testing),
Adhesive force is 0 grade (according to GB/T9286-1998 standard testing).6) product by artificial ageing acceleration test (1000 hours,
Exposure cycles type 7), and evaluated by the comprehensive ageing properties grade of decorative paint film in GB/T1766-2008 standard, it examines
It as a result is 0 grade.
It is that above-mentioned preferred embodiment should be regarded as application scheme embodiment for example, all with application scheme thunder
Same, approximate or technology deduction, replacement, improvement for making based on this etc., are regarded as the protection scope of this patent.
Claims (10)
1. a kind of fire protection flame retarding molding sand face aqueous polyurethane finishing coat, which is characterized in that by mass percentage include following components:
Component A
Wherein the sum of weight percent of component A is absolutely；
B component
Hydrophilic aliphatic polyisocyanate 35.0%~45.0%
Lipophilic aliphatic polymeric isocyanate 30.0%~42.0%
Propylene-glycol diacetate 18.0%~30.0%
Wherein the sum of mass percent of B component is absolutely；
Component A is mixed with B component according to the NCO/OH equivalent proportion of n (- NCO): n (- OH)=1.2~1.3, i.e., in component A
- NCO functional group and B component in-OH functional group equivalent molar ratio be 1.2~1.3.
2. fire protection flame retarding molding sand according to claim 1 face aqueous polyurethane finishing coat, which is characterized in that the sand flour packet
Include one of sand flour that sand flour, partial size that sand flour, partial size that partial size is 8-10 μm are 27-35 μm are 65-75 μm, two
Kind or three kinds.
3. fire protection flame retarding molding sand according to claim 1 face aqueous polyurethane finishing coat, which is characterized in that the aqueous wax powder
For polytetrafluoroethylmodified modified micro mist wax, particle size range is 2-30 μm, molecular weight distribution 600-6000.
4. fire protection flame retarding molding sand according to claim 1 face aqueous polyurethane finishing coat, which is characterized in that in the component A
The additive, by mass percentage include 0.2%~0.4% defoaming agent, 0.3%~0.5% dispersing agent, 0.1%
~0.3% wetting agent, 0.1%~0.3% levelling agent, 0.2%~0.4% thickener.
5. fire protection flame retarding molding sand according to claim 1 face aqueous polyurethane finishing coat, which is characterized in that the hydrophily rouge
The mass ratio of fat race isocyanates and lipophilic aliphatic isocyanates is=1:0.8~1.0.
6. a kind of preparation method of claim 1-5 described in any item fire protection flame retarding molding sand face aqueous polyurethane finishing coat, special
Sign is, comprising the following steps:
The preparation of S1, component A
S1.1, that water, water soluble acrylic acid dispersion hydroxy resin, halogen-free flameproof is added by mass percentage in dispersion cylinder is aqueous poly-
Urethane resin, and carry out middling speed dispersion；
S1.2, nano-titanium dioxide, nano-zinc borate, magnesium hydroxide, aluminium hydroxide, calcined kaolin, sand flour are slowly added to
It with aqueous wax powder, is added with water and rinses casing wall, high speed dispersion 20~50 minutes to fineness≤40 micron up to component A；
The preparation of S2, B component
Be added by weight percentage in dispersion cylinder hydrophilic aliphatic polyisocyanate, lipophilic aliphatic polymeric isocyanate,
Propylene-glycol diacetate, middling speed are dispersed 20~30 minutes, are filtered up to B component；
The preparation of S3, aqueous polyurethane finishing coat
Component A prepared by step S1 and the B component of step S2 preparation according to n (- NCO): n (- OH)=1.2~1.3 NCO/
OH equivalent proportion is uniformly mixed, and 15min is stood.
7. the preparation method of fire protection flame retarding molding sand according to claim 6 face aqueous polyurethane finishing coat, which is characterized in that step
It also needs that defoaming agent, dispersing agent and wetting agent is added before middling speed scatter operation in rapid S1.1.
8. the preparation method of fire protection flame retarding molding sand according to claim 7 face aqueous polyurethane finishing coat, which is characterized in that step
After rapid S1.2 high speed dispersion, levelling agent and thickener is added under low dispersion revolving speed in, middling speed is dispersed 20~40 minutes.
9. the preparation method of fire protection flame retarding molding sand according to claim 8 face aqueous polyurethane finishing coat, which is characterized in that institute
The speed for stating middling speed dispersion is 600~800r/min, it is described in the speed of low dispersion be 400~600r/min, the high speed point
Scattered speed is 1000~1500r/min.
10. the preparation method of fire protection flame retarding molding sand according to claim 8 face aqueous polyurethane finishing coat, which is characterized in that
The component A fineness of step S1 preparation is 15~40um, and viscosity is 60~100s.
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| CN110746875A (en) * | 2019-10-30 | 2020-02-04 | 河北晨阳工贸集团有限公司 | Waterborne polyurethane finish paint and preparation method thereof |
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| CN112191481A (en) * | 2020-09-01 | 2021-01-08 | 湖北润翔重工科技有限公司 | Paint spraying process for tower tube of fan |
| CN113444450A (en) * | 2021-07-19 | 2021-09-28 | 安徽开林新材料股份有限公司 | Preparation process of metal structure fireproof paint |
| CN114395319A (en) * | 2022-02-22 | 2022-04-26 | 中山蓝海洋水性涂料有限公司 | Waterborne polyurethane matte sand textured finish paint for interior decoration of rail transit vehicle and preparation method thereof |
| CN114605890A (en) * | 2022-02-22 | 2022-06-10 | 中山蓝海洋水性涂料有限公司 | Quick-drying polishing-free waterborne epoxy primer for rail transit interior decoration and preparation method thereof |
| CN114773974A (en) * | 2022-02-22 | 2022-07-22 | 中山蓝海洋水性涂料有限公司 | Scratch-resistant wear-resistant waterborne polyurethane finish paint for thin-coating flame-retardant rail transit interior and preparation method thereof |
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Application publication date: 20190607 |