CN113308186B - Flame-retardant silane modified waterproof coating and preparation method thereof - Google Patents
Flame-retardant silane modified waterproof coating and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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Abstract
The invention relates to a flame-retardant silane modified waterproof coating and a preparation method thereof, wherein the flame-retardant silane modified waterproof coating is prepared from the following components in parts by weight:
Description
Technical Field
The invention relates to a flame-retardant silane modified waterproof coating and a preparation method thereof, which are applied to the technical field of waterproof coatings.
Background
The polyurethane waterproof coating has excellent performances of high strength, high elongation, high solid content, strong adhesion and the like, is widely applied to waterproofing and seepage prevention of houses, floors and building materials, but has poor weather resistance, is easy to generate bubbles during construction in high-temperature and high-humidity environments, has higher requirement on the drying degree of a base material, and may contain free isocyanate harmful to human bodies. Pure polyurethane waterproofing coatings without flame retardants have an OI value of only 17%, well below 30%, are extremely flammable and, when burned, are often accompanied by the production of smoke, CO, HCN, etc.
In the prior art, the fire resistance of polyurethane is improved by adopting a physical addition fire retardant or chemical modification mode generally, but the compatibility of an inorganic fire retardant and polyurethane emulsion is poor, the inorganic fire retardant is easy to migrate or separate out of the surface of a coating, the long-time continuous fire retardation is difficult, and the cracking, the aging and the damage of the mechanical property of a coating film are easy to cause. The chemical modification is generally to introduce hydrophilic groups of polyhydroxy into polyurethane, so that the flame retardant effect is lasting, but the waterproof performance of the polyurethane material is weakened, and water molecules absorbed by the polyhydroxy react with polar groups of the polyurethane to form hydrogen bonds, so that the acting force among polyurethane molecules is weakened, and the adhesive force and the mechanical strength of the polyurethane coating are reduced.
Therefore, it is a need to provide a flame-retardant silane-modified waterproof coating with good flame retardancy, high mechanical strength and weather resistance, and a preparation method thereof.
Disclosure of Invention
In order to overcome the defects that the fire resistance of polyurethane is improved by adopting a physical adding fire retardant or chemical modification mode generally in the existing flame-retardant polyurethane waterproof coating, but the existing flame-retardant polyurethane waterproof coating cannot have waterproof and high mechanical strength, the invention provides the flame-retardant silane modified waterproof coating and the preparation method thereof.
The technical scheme of the invention is as follows:
the flame-retardant silane modified waterproof coating is prepared from the following components in parts by weight:
the silane modified ether bond-containing polyurethane resin is mainly prepared from the following components in parts by weight:
the flame-retardant silane modified waterproof coating adopts specially prepared silane modified ether bond-containing polyurethane resin. The double-end hydroxyl polyethylene glycol reacts with polyisocyanate under the melting state and the catalysis of triethylene diamine to prepare polyurethane, and then the peroxide toluoyl is used for initiating the reaction of propylene oxide polyether to prepare the polyurethane polymer containing ether bonds. Then methyl dimethoxy silane is introduced to prepare the silane modified polyurethane resin containing ether bonds. The existence of the propylene oxide polyether chain segment enables the crystallization behavior and structural order of the main chain of the polymer to be damaged, and the hardness of the material is relatively reduced, so that the toughness of the waterproof coating is improved; the methyldimethoxysilane is a chain structure formed by connecting Si-O bonds with city, silicon atoms are mainly connected with methyl, a small amount of unsaturated groups are introduced into a side chain, the intermolecular force is small, molecules are in a spiral structure, and the methyl is arranged outwards and can rotate freely, so that a siloxane product has better heat resistance, weather resistance, electric insulation, chemical stability and other properties, and is introduced into a polyurethane structure, and the weather resistance and mechanical strength of the silane modified polyurethane resin containing ether bonds are greatly improved. The silane modified ether bond-containing polyurethane resin is matched with other preferable component types and dosage proportions, so that the flame-retardant silane modified waterproof coating has the advantages of excellent flame retardance, high mechanical strength (tensile strength and tearing strength), weather resistance and the like. The thixotropic agent is added, so that the bonding effect among the components of the waterproof coating is further improved, and the mechanical property and the toughness of the waterproof coating are further improved.
The composite flame retardant is mainly prepared from the following components in parts by weight:
90-110 parts of silicon flame retardant
35-46 parts of pentaerythritol
15-22 parts of ammonium borate.
The optimized composite flame retardant is compounded by a silicon flame retardant, pentaerythritol and ammonium borate, and has a flame-retardant synergistic effect besides the good flame-retardant effect of the silicon flame retardant, the pentaerythritol and the ammonium borate, so that the flame-retardant performance of the coating can be further improved. The composite flame retardant does not contain halogen elements, is green and environment-friendly, has good compatibility with other components in the waterproof coating, is not easy to migrate or separate out of the surface of the coating, can ensure that the waterproof coating has excellent flame retardance, and improves the mechanical strength of the waterproof coating to a certain degree.
The silicon flame retardant is polydimethylsiloxane.
The preferable silicon flame retardant can further improve the flame retardant property of the coating.
The plasticizer is one or any combination of more than two of DIDP, DBP, paraffin or polyether alcohol.
The optimized plasticizer can further improve the mechanical property and the toughness of the waterproof coating.
The powder filler is one or any combination of more than two of coarse whiting, calcium hydrogen, barium sulfate, carbon black or titanium dioxide.
The optimized powder filler can further improve the mechanical property and toughness of the waterproof coating.
The thixotropic agent is one of polyamide wax, gas silicon or carbon black.
The preferable thixotropic agent can further improve the mechanical property and the toughness of the waterproof coating.
The coupling agent is one of KH-171, A-174 or SH-6030.
The preferable coupling agent can further improve the mechanical property and the toughness of the waterproof coating.
The light stabilizer is one or any combination of more than two of titanium dioxide, ultraviolet absorbent UV-O or ultraviolet absorbent UV-9; the catalyst is one of dibutyltin dilaurate or dibutyltin bisacetylacetonate.
The preferable light stabilizer can further improve the weather resistance of the flame-retardant silane modified waterproof coating. The optimized catalyst can improve the integral synthesis efficiency of the flame-retardant silane modified waterproof coating and improve the integral quality.
The preparation method of the flame-retardant silane modified waterproof coating mainly comprises the following steps of:
(1) Heating and melting double-end hydroxyl polyethylene glycol at 90-110 ℃, introducing nitrogen for protection, adding triethylene diamine and polyisocyanate into the double-end hydroxyl polyethylene glycol, keeping the temperature at 90-110 ℃, stirring for reaction for 1-2h, then adding epoxypropane polyether and peroxide toluoyl, cooling to 85-95 ℃, and stirring for 0.5-1.5h to obtain a polyurethane polymer containing ether bonds;
(2) Adding methyldimethoxysilane into the polyurethane polymer containing ether bonds obtained in the step (1), reacting for 3-5h at a constant temperature of 75-85 ℃, naturally cooling to 25 +/-5 ℃, and simultaneously vacuumizing to a vacuum degree of-0.085 to-0.1 Mpa to obtain silane modified polyurethane resin containing ether bonds;
(3) Mixing the plasticizer, the powder filler and the thixotropic agent, stirring for 2-3 h at the temperature of 110-120 ℃ and the vacuum degree of-0.08 to-0.09 MPa, then cooling to 40 +/-2 ℃, and relieving vacuum;
(4) Adding the silane modified polyurethane resin containing ether bonds and the composite flame retardant into the mixture obtained in the step (3), and stirring and mixing for 15-30 min at the temperature of 25 +/-5 ℃ and normal pressure;
(5) And (4) adding a coupling agent, a light stabilizer and a catalyst into the mixture obtained in the step (4), dispersing and mixing for 10-20min, stirring for 5-10min under the condition of vacuum degree of-0.08 to-0.09 MPa, and finally releasing the vacuum to obtain the flame-retardant silane modified waterproof coating.
The preparation method of the flame-retardant silane modified waterproof coating is simple in steps and convenient to operate.
The composite flame retardant mainly comprises the following steps which are carried out in sequence: firstly, uniformly mixing the silicon flame retardant and pentaerythritol, then heating to 50 +/-2 ℃, adding ammonium borate, and stirring for 30 +/-5 min to obtain the composite flame retardant.
The preparation method of the composite flame retardant has simple steps and convenient operation.
Compared with the prior art, the method has the following advantages that:
1) According to the flame-retardant silane modified waterproof coating, the specially prepared silane modified ether bond-containing polyurethane resin is matched with the preferable types and dosage ratios of other components, and meanwhile, the flame-retardant silane modified waterproof coating has the advantages of excellent flame retardance, high mechanical strength (tensile strength and tearing strength), weather resistance and the like;
2) The optimized composite flame retardant is compounded by a silicon flame retardant, pentaerythritol and ammonium borate, and besides good flame retardant effect of the composite flame retardant, the silicon flame retardant, the pentaerythritol and the ammonium borate have a flame retardant synergistic effect, so that the flame retardant property of the coating can be further improved, and the mechanical strength of the waterproof coating is improved to a certain extent;
3) The preparation method of the flame-retardant silane modified waterproof coating is simple in steps, convenient to operate and easy to popularize.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the embodiments of the specification.
Example 1
The flame-retardant silane modified waterproof coating is prepared from the following components in parts by weight:
the silane modified ether bond-containing polyurethane resin is mainly prepared from the following components in percentage by mass:
the composite flame retardant is mainly prepared from the following components in parts by weight:
silicon flame retardant 100 parts
Pentaerythritol 40 parts
And 20 parts of ammonium borate.
The silicon flame retardant is polydimethylsiloxane.
The plasticizer is DIDP and polyether alcohol according to a mass ratio of 1:3, and mixing the components.
The powder filler is a mixture formed by mixing heavy calcium and calcium hydrogen according to the mass ratio of 1.
The thixotropic agent is polyamide wax; the coupling agent is KH-171; the light stabilizer is titanium dioxide; the catalyst was dibutyltin dilaurate.
The preparation method of the flame-retardant silane modified waterproof coating mainly comprises the following steps of:
(1) Heating and melting double-end hydroxyl polyethylene glycol at 100 ℃, introducing nitrogen for protection, adding triethylene diamine and polyisocyanate into the double-end hydroxyl polyethylene glycol, keeping the temperature at 100 ℃, stirring for reaction for 1.5h, then adding epoxypropane polyether and toloyl peroxide, cooling to 90 ℃, and stirring for 1h to obtain a polyurethane polymer containing ether bonds;
(2) Adding methyldimethoxysilane into the polyurethane polymer containing ether bonds obtained in the step (1), reacting for 5 hours at the constant temperature of 80 ℃, naturally cooling to 25 ℃, and simultaneously vacuumizing to the vacuum degree of-0.09 Mpa to obtain silane modified polyurethane resin containing ether bonds;
(3) Mixing the plasticizer, the powder filler and the thixotropic agent, stirring for 2 hours at 120 ℃ and under the vacuum degree of-0.09 MPa, then cooling to 40 ℃, and removing the vacuum;
(4) Adding silane modified polyurethane resin containing ether bonds and a composite flame retardant into the mixture obtained in the step (3), and stirring and mixing for 30min at 25 ℃ under normal pressure;
(5) And (4) adding a coupling agent, a light stabilizer and a catalyst into the mixture obtained in the step (4), dispersing and mixing for 10min, stirring for 5min under the condition of vacuum degree of-0.08 MPa, and finally releasing the vacuum to obtain the flame-retardant silane modified waterproof coating.
The composite flame retardant mainly comprises the following steps which are carried out in sequence: firstly, uniformly mixing the silicon flame retardant and pentaerythritol, then heating to 50 ℃, adding ammonium borate, and stirring for 30min to obtain the composite flame retardant.
Example 2
The flame-retardant silane modified waterproof coating and the preparation method thereof are prepared from the following components in parts by weight:
the silane-modified polyurethane resin containing ether bonds is prepared from the following components in percentage by mass:
the composite flame retardant is mainly prepared from the following components in parts by weight:
90 portions of silicon flame retardant
46 portions of pentaerythritol
And 15 parts of ammonium borate.
The silicon flame retardant is polydimethylsiloxane; the plasticizer is DBP; the powder filler is barium sulfate; the thixotropic agent is fumed silica; the coupling agent is A-174; the light stabilizer is an ultraviolet absorbent UV-O; the catalyst is dibutyltin bisacetylacetonate.
The preparation method of the flame-retardant silane modified waterproof coating mainly comprises the following steps of:
(1) Heating and melting double-end hydroxyl polyethylene glycol at 110 ℃, introducing nitrogen for protection, adding triethylene diamine and polyisocyanate into the double-end hydroxyl polyethylene glycol, keeping the temperature at 110 ℃, stirring for reaction for 1h, then adding epoxypropane polyether and toloyl peroxide, cooling to 95 ℃, and stirring for 0.5h to obtain a polyurethane polymer containing ether bonds;
(2) Adding methyldimethoxysilane into the polyurethane polymer containing ether bonds obtained in the step (1), reacting for 3 hours at the constant temperature of 75 ℃, naturally cooling to 20 ℃, and simultaneously vacuumizing to the vacuum degree of-0.1 Mpa to obtain silane modified polyurethane resin containing ether bonds;
(3) Mixing the plasticizer, the powder filler and the thixotropic agent, stirring for 3 hours at the temperature of 110 ℃ and the vacuum degree of-0.08 MPaMPa, then cooling to 38 ℃, and releasing the vacuum;
(4) Adding silane modified polyurethane resin containing ether bonds and a composite flame retardant into the mixture obtained in the step (3), and stirring and mixing for 15min at 30 ℃ under normal pressure;
(5) And (4) adding a coupling agent, a light stabilizer and a catalyst into the mixture obtained in the step (4), dispersing and mixing for 20min, stirring for 10min under the condition of vacuum degree of-0.09 MPa, and finally releasing the vacuum to obtain the flame-retardant silane modified waterproof coating.
The composite flame retardant mainly comprises the following steps which are carried out in sequence: firstly, uniformly mixing the silicon flame retardant and pentaerythritol, then heating to 52 ℃, adding ammonium borate, and stirring for 25min to obtain the composite flame retardant.
Example 3
The flame-retardant silane modified waterproof coating and the preparation method thereof are prepared from the following components in parts by weight:
the silane modified polyurethane resin containing ether bonds is prepared from the following components in percentage by mass:
the composite flame retardant is mainly prepared from the following components in parts by weight:
110 portions of silicon flame retardant
35 portions of pentaerythritol
And 22 parts of ammonium borate.
The silicon flame retardant is polydimethylsiloxane; the plasticizer is paraffin; the powder filler is formed by mixing barium sulfate, calcium hydrogen and titanium dioxide according to the mass ratio of 1; the thixotropic agent is carbon black; the coupling agent is SH-6030; the light stabilizer is an ultraviolet absorbent UV-9; the catalyst is bis-acetylacetone dibutyl tin.
The preparation method of the flame-retardant silane modified waterproof coating mainly comprises the following steps of:
(1) Heating and melting double-end hydroxyl polyethylene glycol at 90 ℃, introducing nitrogen for protection, adding triethylene diamine and polyisocyanate into the double-end hydroxyl polyethylene glycol, keeping the temperature at 90 ℃, stirring for reaction for 2 hours, then adding epoxypropane polyether and toloyl peroxide, cooling to 85 ℃, and stirring for 1.5 hours to obtain a polyurethane polymer containing ether bonds;
(2) Adding methyldimethoxysilane into the polyurethane polymer containing ether bonds obtained in the step (1), reacting at the constant temperature of 85 ℃ for 4h, naturally cooling to 30 ℃, and simultaneously vacuumizing to the vacuum degree of-0.085 Mpa to obtain silane modified polyurethane resin containing ether bonds;
(3) Mixing the plasticizer, the powder filler and the thixotropic agent, stirring for 2.53 hours at 115 ℃ under the condition that the vacuum degree is-0.085 MPa, then cooling to 42 ℃, and releasing the vacuum;
(4) Adding silane modified polyurethane resin containing ether bonds and a composite flame retardant into the mixture obtained in the step (3), and stirring and mixing for 28min at 20 ℃ under normal pressure;
(5) And (4) adding a coupling agent, a light stabilizer and a catalyst into the mixture obtained in the step (4), dispersing and mixing for 18min, stirring for 8min under the condition that the vacuum degree is-0.085 MPa, and finally releasing the vacuum to obtain the flame-retardant silane modified waterproof coating.
The composite flame retardant mainly comprises the following steps which are carried out in sequence: firstly, uniformly mixing the silicon flame retardant and pentaerythritol, then heating to 48 ℃, adding ammonium borate, and stirring for 35min to obtain the composite flame retardant.
Information on the manufacturer of the partial raw materials involved in the examples:
a-174: the new material group of the Mianji, silane coupling agent gamma-methacryloxypropyl trimethoxy silane;
SH-6030: dow Corning chemical company, USA;
KH-171: shandong Huanji chemical Co., ltd, vinyltrimethoxysilane.
Experimental data:
comparative example: the silane modified polymer waterproof coating is prepared from the following components in parts by weight: 30 parts of silane modified polymer resin, 15 parts of plasticizer, 50 parts of powder filler, 2 parts of coupling agent, 2 parts of thixotropic agent, 1 part of light stabilizer and 0.6 part of catalyst, and the preparation method and the example 3 refer to the example 3 specifically.
Wherein, the silane modified polymer resin is Desmoseal S XP2636 of Corsai Polymer (China) Limited, the plasticizer is DIDP, the powder filler is barium sulfate, the thixotropic agent is carbon black, the coupling agent is SH-6030, the light stabilizer is an ultraviolet absorbent UV-9, and the catalyst is dibutyltin bisacetylacetonate.
The finished coatings of examples 1 to 3 and comparative example were sealed and left for 24 hours, respectively, and then applied to a mold to form a coating film having a thickness of about 1.5mm, and after curing for 7 days under standard test conditions, the tensile strength, elongation at break, tear strength, heat resistance and weather resistance of the coating film were measured, and the results are shown in the following table.
The detection method comprises the following steps:
1. the tensile strength and the elongation at break refer to a dumbbell I type specified by GB/T528, and the test method of the tear strength refers to a right-angled shape without a cut specified by GB/T529-2008; the combustion performance is measured according to GB/T8626-2007; the weather resistance is specified by 6.6 method A cycle 1 in GB/T16422.3-2014;
2. viscosity: and (3) placing the sample to be tested in a standard test environment (23 +/-2 ℃ and 50% relative humidity) for 24 hours in a sealed manner, and then performing viscosity test in the standard test environment by adopting a Brookfield rotary viscometer.
TABLE 1 Performance test results of flame-retardant silane-modified waterproof coating material of each example
From the test results on the table above, it can be seen that the flame retardance of the flame-retardant silane modified waterproof coating of each embodiment of the application is improved remarkably, and the tensile strength and the tear strength are improved to a certain extent.
The flame-retardant silane-modified waterproof coating and the preparation method thereof are not limited to the examples, and any modification or replacement according to the principles of the present invention should be within the protection scope of the present invention.
Claims (7)
1. The flame-retardant silane modified waterproof coating is characterized by comprising the following components in parts by weight: the composition is prepared from the following components in parts by weight:
20-40 parts of silane modified ether bond-containing polyurethane resin
10-20 parts of plasticizer
30-60 parts of powder filler
1-2 parts of coupling agent
1-2 parts of thixotropic agent
1-2 parts of light stabilizer
1-3 parts of composite flame retardant
0.5-0.8 part of catalyst;
the silane modified ether bond-containing polyurethane resin is mainly prepared from the following components in parts by weight:
90-110 parts of hydroxyl-terminated polyethylene glycol
1-2 parts of triethylene diamine
80-90 parts of polyisocyanate
45-53 parts of propylene oxide polyether
2-3 parts of dibenzoyl peroxide
15-20 parts of methyldimethoxysilane;
the composite flame retardant is mainly prepared from the following components in parts by weight:
90-110 parts of silicon flame retardant
35-46 parts of pentaerythritol
15-22 parts of ammonium borate;
the silicon flame retardant is polydimethylsiloxane;
the preparation method of the flame-retardant silane modified waterproof coating mainly comprises the following steps of:
(1) Heating and melting double-end hydroxyl polyethylene glycol at 90-110 ℃, introducing nitrogen for protection, adding triethylene diamine and polyisocyanate into the double-end hydroxyl polyethylene glycol, keeping the temperature at 90-110 ℃, stirring and reacting for 1-2h, then adding epoxypropane polyether and dibenzoyl peroxide, cooling to 85-95 ℃, and stirring for 0.5-1.5h to obtain a polyurethane polymer containing ether bonds;
(2) Adding methyldimethoxysilane into the polyurethane polymer containing ether bonds obtained in the step (1), reacting for 3-5h at the constant temperature of 75-85 ℃, then naturally cooling to 25 +/-5 ℃, and simultaneously vacuumizing to the vacuum degree of-0.085 to-0.1 Mpa to obtain silane modified polyurethane resin containing ether bonds;
(3) Mixing the plasticizer, the powder filler and the thixotropic agent, stirring for 2-3 h at 110-120 ℃ and under the vacuum degree of-0.08-0.09 MPa, then cooling to 40 +/-2 ℃, and relieving vacuum;
(4) Adding silane modified polyurethane resin containing ether bonds and a composite flame retardant into the mixture obtained in the step (3), and stirring and mixing for 15-30 min at the temperature of 25 +/-5 ℃ under normal pressure;
(5) Adding a coupling agent, a light stabilizer and a catalyst into the mixture obtained in the step (4), dispersing and mixing for 10-20min, stirring for 5-10min under the condition of vacuum degree of-0.08 to-0.09 MPa, and finally releasing the vacuum to obtain the flame-retardant silane modified waterproof coating;
the composite flame retardant mainly comprises the following steps which are carried out in sequence: firstly, uniformly mixing the silicon flame retardant and pentaerythritol, then heating to 50 +/-2 ℃, adding ammonium borate, and stirring for 30 +/-5 min to obtain the composite flame retardant.
2. The flame-retardant, silane-modified, waterproof coating material according to claim 1, characterized in that: the plasticizer is one or any combination of more than two of DIDP, DBP, paraffin or polyether alcohol.
3. The flame-retardant, silane-modified, waterproof coating material according to claim 1, characterized in that: the powder filler is one or any combination of more than two of heavy calcium, light calcium, barium sulfate, carbon black or titanium dioxide.
4. The flame-retardant, silane-modified, waterproof coating material according to claim 1, characterized in that: the thixotropic agent is one of polyamide wax, gas silicon or carbon black.
5. The flame-retardant, silane-modified, waterproof coating material according to claim 1, characterized in that: the coupling agent is KH-171 or A-174.
6. The flame-retardant, silane-modified, waterproof coating material according to claim 1, characterized in that: the light stabilizer is one or any combination of more than two of titanium dioxide, ultraviolet absorbent UV-O or ultraviolet absorbent UV-9; the catalyst is one of dibutyltin dilaurate or dibutyltin bisacetylacetonate.
7. The method for producing the flame-retardant, silane-modified waterproof coating material according to any one of claims 1 to 6, characterized in that: mainly comprises the following steps which are carried out in sequence:
(1) Heating and melting double-end hydroxyl polyethylene glycol at 90-110 ℃, introducing nitrogen for protection, adding triethylene diamine and polyisocyanate into the double-end hydroxyl polyethylene glycol, keeping the temperature at 90-110 ℃, stirring and reacting for 1-2h, then adding epoxypropane polyether and dibenzoyl peroxide, cooling to 85-95 ℃, and stirring for 0.5-1.5h to obtain a polyurethane polymer containing ether bonds;
(2) Adding methyldimethoxysilane into the polyurethane polymer containing ether bonds obtained in the step (1), reacting for 3-5h at a constant temperature of 75-85 ℃, naturally cooling to 25 +/-5 ℃, and simultaneously vacuumizing to a vacuum degree of-0.085 to-0.1 Mpa to obtain silane modified polyurethane resin containing ether bonds;
(3) Mixing the plasticizer, the powder filler and the thixotropic agent, stirring for 2-3 h at the temperature of 110-120 ℃ and the vacuum degree of-0.08 to-0.09 MPa, then cooling to 40 +/-2 ℃, and relieving vacuum;
(4) Adding silane modified polyurethane resin containing ether bonds and a composite flame retardant into the mixture obtained in the step (3), and stirring and mixing for 15-30 min at the temperature of 25 +/-5 ℃ under normal pressure;
(5) Adding a coupling agent, a light stabilizer and a catalyst into the mixture obtained in the step (4), dispersing and mixing for 10-20min, stirring for 5-10min under the condition of vacuum degree of-0.08 to-0.09 MPa, and finally releasing the vacuum to obtain the flame-retardant silane modified waterproof coating;
the composite flame retardant mainly comprises the following steps which are carried out in sequence: firstly, uniformly mixing the silicon flame retardant and pentaerythritol, then heating to 50 +/-2 ℃, adding ammonium borate, and stirring for 30 +/-5 min to obtain the composite flame retardant.
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| EP2726527B1 (en) * | 2011-06-30 | 2015-07-29 | Dow Global Technologies LLC | Silicone backbone prepolymers for flame resistant polyurethanes |
| CN106947380B (en) * | 2017-03-15 | 2018-07-17 | 广东中星科技股份有限公司 | A kind of environmental protection flame retardant anticorrosive paint based on polyurethane |
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| CN108456483A (en) * | 2018-02-08 | 2018-08-28 | 湖州科博信息科技有限公司 | A kind of one pack system water proof fire retardant polyurethane coating |
| CN112500671A (en) * | 2020-10-14 | 2021-03-16 | 南通东弘电线电缆有限公司 | Insulating layer material for electric wire and preparation method thereof |
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