CN104479601B - A kind of high moistureproof urea-formaldehyde resin adhesive and preparation method thereof - Google Patents
A kind of high moistureproof urea-formaldehyde resin adhesive and preparation method thereof Download PDFInfo
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- CN104479601B CN104479601B CN201410587643.0A CN201410587643A CN104479601B CN 104479601 B CN104479601 B CN 104479601B CN 201410587643 A CN201410587643 A CN 201410587643A CN 104479601 B CN104479601 B CN 104479601B
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Abstract
The invention belongs to beaver board field of adhesive technology, it is related to urea-formaldehyde resin adhesive, more particularly to a kind of high moistureproof urea-formaldehyde resin adhesive and preparation method thereof.A kind of high moistureproof urea-formaldehyde resin adhesive disclosed in this invention, is made up of the raw material of following parts by weight：45 55 parts of formaldehyde, 1 18 parts of water, 22 30 parts of urea, 8 30 parts of composite assistant, 0.1 0.5 parts of sodium methyl silicate；The composite assistant is mixed by polyvinyl alcohol, melamine and ethylene glycol, wherein the parts by weight of polyvinyl alcohol 0.1 1, the parts by weight of melamine 1 95, the parts by weight of ethylene glycol 1 10.The invention also discloses the method for preparing the moistureproof urea-formaldehyde resin adhesive of the height.High moistureproof modified urea-formaldehyde resin adhesive disclosed in this invention, bonding property is good, low cost；Glue is simple to operate, and production efficiency is high；Obtained wood-based plate, with stronger humidity resistance, and the thickness swelling rate of sheet material is very low, and the use environment of wood-based plate has been expanded significantly and scope is used, the service life of sheet material is extended.
Description
Technical field
The invention belongs to beaver board field of adhesive technology, it is related to urea-formaldehyde resin adhesive, more particularly to it is a kind of
High protection against the tide urea-formaldehyde resin adhesive and preparation method thereof.
Background technology
Medium and high density fibre panel is uniform because of its fibr tissue, and interfibrous bonding strength is high, therefore its MOR, plane
Tensile strength, modulus of elasticity etc. are better than particieboard, in addition with good machining property, such as sawing, drill, slot, opening
Tenon, sanding processing and engraving, the edge of plate can be processed by any shape, and surface is smooth after processing, is widely used in medium-to-high grade
The industries such as Furniture manufacture, interior decoration, loudspeaker casing, musical instrument, car and boat interior decoration.Because main raw material(s) is timber, sheet material is deposited
The problems such as water swelling.By being modified to glue or waterproofing agent being added during sheet material, plate can be properly increased
The water resistance of material, but higher applied environment is required for waterproof and dampproof, when this kind of sheet material is exposed to wet condition or week
Phase property get wet in the environment of when, the sheet material of common classification of waterproof can be because moistureproof and waterproof grade is low and the quality such as layering, spalling occurs
Problem, it is impossible to be adapted to particular surroundings requirement.Such as it is applied to moist or outdoor environment, is recruited for manufacturing outdoor use billboard
Board, tables and chairs, outdoor notice plate, exterior door, toilet decoration, transportation box, building template, vehicle interior finishing, shop fronts dress
Decorations etc., largely need the medium and high density fibre panel with high moisture energy, with the extensive market demand.
High Dampproof plate has accounted for 30%-40% in the market share of American-European countries, and China, high protection against the tide wood-based plate
Research and development and application be in the starting stage, also without ripe high Dampproof plate industrialization.The research and development of high protection against the tide wood-based plate are crucial
The research and development of high moistureproof adhesive technology are that, methyl diphenylene diisocyanate (MDI) is that the generally acknowledged excellent protection against the tide that has is prevented
Aqueous energy and the high-quality adhesive without aldehyde, the production for wood-based plate also have very long history, and production technology is highly developed, can be light
The production of the existing high Dampproof plate of pine nut.But its price is high, manufacturing enterprise, market and consumer are difficult to bear.Therefore, open
The moistureproof urea-formaldehyde resin adhesive of height that to send out a kind of inexpensive, with great economic benefit and social benefit.
The content of the invention
It is an object of the present invention to provide a kind of high moistureproof urea-formaldehyde resin adhesive and preparation method thereof, and applied
The production of medium and high density fibre panel, realizes the sheet material exploitation of high moistureproof medium and high density fibre panel.
Technical scheme disclosed in this invention：
A kind of high moistureproof urea-formaldehyde resin adhesive, is made up of the raw material of following parts by weight：
45-55 parts of formaldehyde, 1-18 parts of water, 22-30 parts of urea, 8-30 parts of composite assistant, 0.1-0.5 parts of sodium methyl silicate；
The composite assistant is mixed by polyvinyl alcohol, melamine and ethylene glycol, wherein polyvinyl alcohol 0.1-1 weight
Part, melamine 1-95 parts by weight, ethylene glycol 1-10 parts by weight.
Composite assistant of the present invention can in proportion be added according to different wood-based plate humidity resistance class requirements, be led to
The amount of composite assistant and urea is overregulated to meet the requirement of different wood-based plate PARA FORMALDEHYDE PRILLS(91,95) burst sizes.The function and use of composite assistant
Way is mainly reflected in：Synergistic effect for promoting formaldehyde and urea reaction, multicomponent compound auxiliary effect is more preferable, implantation is a large amount of
Constitutionally stable group is in molecular resin, and reduction resin hydrolyzing speed, excellent adhesive accelerant can improve the scattered of resin
Property simultaneously improves cohesive and water resistance；A small amount of sodium methyl silicate is added in resin reaction latter stage, the water resistance of resin can be improved
And ageing-resistant performance.
A kind of preparation method of high moistureproof urea-formaldehyde resin adhesive, comprises the following steps：
(1) total formaldehyde amount 60-70% formalin and water are put into reactor, after stirring, heating heating, simultaneously
Use quality percent concentration 20-30% sodium hydrate aqueous solution adjustment reacting solution pH value is 9.2-9.4；
(2) 40 DEG C are warming up to, stops heating, composite assistant is added, continues the 30~50min of heating that heats up, is heated to 90-93
DEG C insulation 50min；
(3) acidometer detects the pH value of solution, adjusts pH>9.0 add remaining formalin；
(4) urea is added, 70 DEG C are cooled to, in 70-72 DEG C of reaction to terminal, muddy method detects the terminal of reaction solution；
(5) reach after reaction end, add anti-with the sodium hydrate aqueous solution adjustment of 20-30% concentration after sodium methyl silicate
It is 8.0-9.0 to answer solution ph；
(6) 38-40 DEG C is cooled to, the pH of final product is adjusted>9.0, discharging.
Muddy method of the present invention detects in the terminal of reaction solution, i.e., the water that reaction solution is instilled to 25 DEG C that observation is white
Mist form occurs, and it is reaction end to treat that white mist form occurs.
Preparation method of the present invention, the 3 times or 4 times additions of Lauxite traditional " alkali-Acid-Base " urea point are not used
Synthesis technique, but under basic conditions, formaldehyde point 2 times, 1 property addition of urea carry out it is synthetically prepared.
Raw material used in the present invention, is commercially available, technical grade.
Beneficial effect
Compared with prior art, the moistureproof modified urea-formaldehyde resin adhesive of height of the invention, bonding property is good, low cost；System
Glue is simple to operate, and production efficiency is high；Using the wood-based plate of the adhesive producing, not only with stronger humidity resistance, and sheet material
Thickness swelling rate it is very low.The use environment of wood-based plate has been expanded significantly and scope is used, while extending sheet material
Service life.
Embodiment
With reference to specific implementation example, the present invention will be further described, so that those skilled in the art more fully understand
The present invention, but the invention is not limited in following examples.
Embodiment 1
A kind of high moistureproof urea-formaldehyde resin adhesive, includes the raw material of following parts by weight：
45 parts of formaldehyde, 1 part of water, 22 parts of urea, 8 parts of composite assistant, 0.1 part of sodium methyl silicate；
The composite assistant weight and number are：0.1 part of polyvinyl alcohol, 1 part of melamine, 1 part of ethylene glycol.
Embodiment 2
A kind of high moistureproof urea-formaldehyde resin adhesive, includes the raw material of following parts by weight：
55 parts of formaldehyde, 18 parts of water, 30 parts of urea, 30 parts of composite assistant, 0.5 part of sodium methyl silicate；
The composite assistant weight and number are：1 part of polyvinyl alcohol, 95 parts of melamine, 10 parts of ethylene glycol.
Embodiment 3
A kind of high moistureproof urea-formaldehyde resin adhesive, includes the raw material of following parts by weight：
50 parts of formaldehyde, 10 parts of water, 16 parts of urea, 19 parts of composite assistant, 0.3 part of sodium methyl silicate；
The composite assistant weight and number are：0.5 part of polyvinyl alcohol, 45 parts of melamine, 5 parts of ethylene glycol.
Embodiment 4
A kind of high moistureproof urea-formaldehyde resin adhesive, includes the raw material of following parts by weight：
45 parts of formaldehyde, 18 parts of water, 30 parts of urea, 30 parts of composite assistant, 0.5 part of sodium methyl silicate；
The composite assistant weight and number are：0.1 part of polyvinyl alcohol, 95 parts of melamine, 9 parts of ethylene glycol.
Embodiment 5
The preparation method of the moistureproof urea-formaldehyde resin adhesive of height as disclosed in above-mentioned embodiment is prepared, including：
Formalin 300kg and 170kg water are put into reactor, after stirring, heating heating, while dense using 30%
The sodium hydrate aqueous solution adjustment reacting solution pH value of degree is 9.2-9.4；When being warming up to 40 DEG C, stop heating, start addition multiple
Auxiliary agent (polyvinyl alcohol 1kg, melamine 250kg, ethylene glycol 20kg) is closed, after addition is finished, continues the heating that heats up；It is heated to 90
℃.50 minutes are incubated at 90-93 DEG C.Acidometer detects the pH of reaction solution, maintains solution ph to be more than 9.0.Add secondary first
Urea 230kg is added after aldehyde 200kg, 10min, in 70-72 DEG C of reaction.The terminal of reaction solution is detected using muddy method, will be reacted
Drop enters in 25 DEG C of water, and the white mist form of observation occurs, until white mist form occurs being reaction end.Reach anti-
Answer after terminal, pH is surveyed after adding sodium methyl silicate 1kg, be with the sodium hydrate aqueous solution adjustment reacting solution pH value of 25% concentration
9.5-10.0.38-40 DEG C is cooled to, the sodium hydrate aqueous solution of 25% concentration adjusts pH>9.0, discharging.
Embodiment 6
The preparation method of the moistureproof urea-formaldehyde resin adhesive of height as disclosed in above-mentioned embodiment is prepared, including：
Formaldehyde 1200kg and 600kg water are put into reactor, after stirring, heating heating, while using 30% concentration
Sodium hydrate aqueous solution adjustment reacting solution pH value be 9.2-9.4；When being warming up to 40 DEG C, stop heating, start addition compound
Auxiliary agent (polyvinyl alcohol 3kg, melamine 1000kg, ethylene glycol 90kg), after addition is finished, continues the heating that heats up；It is heated to 90
℃.50 minutes are incubated at 90-93 DEG C.Acidometer detects the pH of reaction solution, maintains solution ph to be more than 9.0.Add secondary first
Urea 900kg is added after aldehyde 550kg, 10min, in 70-72 DEG C of reaction.The terminal of reaction solution is detected using muddy method, will be reacted
Drop enters in 25 DEG C of water, and the white mist form of observation occurs, until white mist form occurs being reaction end.Reach anti-
Answer after terminal, pH is surveyed after adding sodium methyl silicate 4kg, be with the sodium hydrate aqueous solution adjustment reacting solution pH value of 25% concentration
9.5-10.0.38-40 DEG C is cooled to, the sodium hydrate aqueous solution of 25% concentration adjusts pH>9.0, discharging.
Embodiment 7
The preparation method of the moistureproof urea-formaldehyde resin adhesive of height as disclosed in above-mentioned embodiment is prepared, including：
One formaldehyde 1200kg and 600kg water is put into reactor, after stirring, heating heating, while dense using 30%
The sodium hydrate aqueous solution adjustment reacting solution pH value of degree is 9.2-9.4；When being warming up to 40 DEG C, stop heating, start addition multiple
Auxiliary agent (polyvinyl alcohol 3kg, melamine 1300kg, ethylene glycol 90kg) is closed, after addition is finished, continues the heating that heats up；It is heated to
90℃.50 minutes are incubated at 90-93 DEG C.Acidometer detects the pH of reaction solution, maintains solution ph to be more than 9.0.Add secondary
Urea 1000kg is added after formaldehyde 600kg, 10min, in 70-72 DEG C of reaction.The terminal of reaction solution is detected using muddy method, will be anti-
Answer in the water that drop enters 25 DEG C, the white mist form of observation occurs, until white mist form occurs being reaction end.Reach
After reaction end, pH is surveyed after adding sodium methyl silicate 4kg, reacting solution pH value is adjusted with the sodium hydrate aqueous solution of 25% concentration
For 9.5-10.0.38-40 DEG C is cooled to, the sodium hydrate aqueous solution of 25% concentration adjusts pH>9.0, discharging.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent flow conversion that bright description is made, or other related technical fields are directly or indirectly used in, similarly wrap
Include in the scope of patent protection of the present invention.
Claims (4)
1. a kind of method for preparing high moistureproof urea-formaldehyde resin adhesive, the adhesive is made up of the raw material of following parts by weight：
45-55 parts of formaldehyde, 1-18 parts of water, 22-30 parts of urea, 8-30 parts of composite assistant, 0.1-0.5 parts of sodium methyl silicate；Its feature exists
In comprising the following steps：
（1）By the formalin of total formaldehyde amount 60~70% and water input reactor, after stirring, heating heating is used simultaneously
The sodium hydrate aqueous solution adjustment reacting solution pH value of concentration 20~30% is 9.2~9.4；
（2）40 DEG C are warming up to, stops heating, composite assistant is added, continues the heating that heats up, to 90~93 DEG C of insulation 50min；
（3）Acidometer detects the pH value of solution, adjusts pH>9.0 add remaining formalin；
（4）Urea is added, 70 DEG C are cooled to, in 70~72 DEG C of reactions to terminal, muddy method detects the terminal of reaction solution；
（5）Reach after reaction end, add molten with the sodium hydrate aqueous solution adjustment reaction of 20-30% concentration after sodium methyl silicate
Liquid pH value is 8.0~9.0；
（6）38~40 DEG C are cooled to, the pH of final product is adjusted>9.0, discharging；
Wherein, described 20~30% sodium hydrate aqueous solution is mass percent concentration.
2. preparation method according to claim 1, it is characterised in that：The composite assistant is by polyvinyl alcohol, melamine
Mixed with ethylene glycol, wherein polyvinyl alcohol 0.1-1 parts by weight, melamine 1-95 parts by weight, ethylene glycol 1-10 parts by weight.
3. preparation method according to claim 1, it is characterised in that：Step（2）In, composite assistant is added, continues to heat up
Heat time is 30~50min.
4. preparation method according to claim 1, it is characterised in that：Step（4）The muddy method, i.e., instill reaction solution
In 25 DEG C of water, the white mist form of observation occurs, and it is reaction end to treat that white mist form occurs.
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| CN201410587643.0A CN104479601B (en) | 2014-10-29 | 2014-10-29 | A kind of high moistureproof urea-formaldehyde resin adhesive and preparation method thereof |
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| CN201410587643.0A CN104479601B (en) | 2014-10-29 | 2014-10-29 | A kind of high moistureproof urea-formaldehyde resin adhesive and preparation method thereof |
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| CN104479601B true CN104479601B (en) | 2017-07-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106117476A (en) * | 2016-08-04 | 2016-11-16 | 广西三威林产工业有限公司 | High density fiberboard moistureproof adhesive and preparation method thereof |
| CN109096967A (en) * | 2018-06-28 | 2018-12-28 | 广西丰林木业集团股份有限公司 | A kind of preparation method of composite modified gluing agent and the manufacturing method of anti-wet fiber plate |
| CN111171770B (en) * | 2018-11-09 | 2022-04-08 | 青岛科技大学 | Synergistic silicon modified phenolic resin adhesive and preparation of recombined wood thereof |
| CN115477914B (en) * | 2022-10-21 | 2023-11-24 | 大庆市金鹏辉科技有限公司 | Moisture-proof adhesive and preparation method thereof |
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| US6548625B2 (en) * | 2001-03-23 | 2003-04-15 | Cytec Technology Corp. | Stable liquid melamine urea formaldehyde resins, hardeners, adhesive compositions, and methods for making same |
| CN101698786A (en) * | 2009-10-29 | 2010-04-28 | 曲阜市慧迪化工有限责任公司 | Adhesive for orienting shaving board and production method thereof |
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