CN104479601A - High-moisture resistance urea-formaldehyde resin adhesive and preparation method thereof - Google Patents
High-moisture resistance urea-formaldehyde resin adhesive and preparation method thereof Download PDFInfo
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- CN104479601A CN104479601A CN201410587643.0A CN201410587643A CN104479601A CN 104479601 A CN104479601 A CN 104479601A CN 201410587643 A CN201410587643 A CN 201410587643A CN 104479601 A CN104479601 A CN 104479601A
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Abstract
The invention belongs to the technical field of adhesives for artificial fiber plates, relates to a urea-formaldehyde resin adhesive and especially relates to a high-moisture resistance urea-formaldehyde resin adhesive and a preparation method thereof. The high-moisture resistance urea-formaldehyde resin adhesive comprises, by weight, 45-55 parts of formaldehyde, 1-18 parts of water, 22-30 parts of urea, 8-30 parts of a composite assistant, and 0.1-0.5 parts of methanesiliconic acid sodium salt. The composite assistant is obtained by mixing of 0.1-1 part by weight of polyvinyl alcohol, 1-95 parts by weight of melamine and 1-10 parts by weight of glycol. The invention discloses a preparation method of the high-moisture resistance urea-formaldehyde resin adhesive. The high-moisture resistance urea-formaldehyde resin adhesive has good viscosity and a low cost. The preparation method has simple processes and high production efficiency. An artificial board with the high-moisture resistance urea-formaldehyde resin adhesive has high moisture resistance and a very low water absorption thickness swelling rate, greatly widens an artificial board use environment and range and prolongs a board service life.
Description
Technical field
The invention belongs to beaver board and stick with glue agent technical field, relate to urea-formaldehyde resin adhesive, particularly relate to a kind of high moistureproof urea-formaldehyde resin adhesive and preparation method thereof.
Background technology
Medium and high density fibre panel because of its fibrous tissue even, interfibrous bonding strength is high, therefore its MOR, two-dimensional electrostatic fields, modulus of elasticity geometric ratio shaving board are good, in addition there is good machining property, as sawing, boring, fluting, mortise, sanding processing and engraving, the edge of plate can process by any shape, and processing rear surface is smooth, is widely used in the industries such as medium-to-high grade Furniture manufacture, interior decoration, loudspeaker casing, musical instrument, car and boat interior decoration.Because main raw material(s) is timber, there is the problems such as water-swelling in sheet material.By carrying out modification to glue or add water-resisting agent in sheet material process, suitably can improve the water resistance of sheet material, but for the applied environment that waterproof and dampproof requirement is higher, when this kind of sheet material is exposed to wet condition or periodicity becomes under wet environment, can there are the quality problems such as layering, spalling because moistureproof and waterproof grade is low in the sheet material of common classification of waterproof, can not be adapted to particular surroundings requirement.Such as be applicable to humidity or outdoor environment, be used for manufacturing outdoor use billboard signboard, tables and chairs, outdoor notice plate, exterior door, toilet decoration, transportation box, building template, vehicle interior finishing, shop fronts decoration etc., need the medium and high density fibre panel with high moisture energy in a large number, there is the market requirement widely.
High Dampproof plate has accounted for 30%-40% in the market share of American-European countries, and China, the research and development of high moistureproof wood-based plate and application are in the starting stage, also do not have ripe high Dampproof plate industrialization.The research and development key of high moistureproof wood-based plate is just the research and development of high moistureproof adhesive technology, diphenylmethanediisocyanate (MDI) generally acknowledged has excellent moistureproof and waterproof performance and without the high-quality tackiness agent of aldehyde, production for wood-based plate also has very long history, production technology is very ripe, easily can realize the production of high Dampproof plate.But its price is high, manufacturing enterprise, market and human consumer are difficult to bear.Therefore, develop a kind of moistureproof urea-formaldehyde resin adhesive of height of low cost, there is great economic benefit and social benefit.
Summary of the invention
The object of the invention is to, a kind of high moistureproof urea-formaldehyde resin adhesive and preparation method thereof is provided, and is applied the production of medium and high density fibre panel, realize 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:
Formaldehyde 45-55 part, water 1-18 part, urea 22-30 part, composite assistant 8-30 part, sodium methyl silicate 0.1-0.5 part;
Described composite assistant is mixed by polyvinyl alcohol, trimeric cyanamide and ethylene glycol, wherein polyvinyl alcohol 0.1-1 weight part, trimeric cyanamide 1-95 weight part, ethylene glycol 1-10 weight part.
Composite assistant of the present invention can add in proportion according to different wood-based plate humidity resistance class requirement, by the requirement regulating the amount of composite assistant and urea to carry out satisfied different wood-based plate PARA FORMALDEHYDE PRILLS(91,95) burst size.Function and the purposes of composite assistant are mainly reflected in: for promoting the synergism of formaldehyde and urea reaction, polycomponent compound auxiliary better effects if, implant a large amount of constitutionally stable group in molecular resin, reduce resin hydrolyzing speed, excellent adhesive accelerant, the dispersiveness of resin can be improved and improve binding property and water tolerance; Add a small amount of sodium methyl silicate latter stage at resin reaction, water tolerance and the ageing-resistant performance of resin can be improved.
A preparation method for high moistureproof urea-formaldehyde resin adhesive, comprises the following steps:
(1) formaldehyde solution of total formaldehyde amount 60-70% and water are dropped into reactor, after stirring, heat up heating, and the aqueous sodium hydroxide solution adjustment reacting solution pH value of functional quality percentage concentration 20-30% is 9.2-9.4 simultaneously;
(2) be warming up to 40 DEG C, stop heating, add composite assistant, continue intensification heating 30 ~ 50min, be heated to 90-93 DEG C of insulation 50min;
(3) acidometer detects the pH value of solution, and adjustment pH>9.0 adds remaining formaldehyde solution;
(4) add urea, be cooled to 70 DEG C, 70-72 DEG C of reaction to terminal, the terminal of muddy method detection reaction liquid;
(5), after reaching reaction end, adjusting reacting solution pH value with the aqueous sodium hydroxide solution of 20-30% concentration after adding sodium methyl silicate is 8.0-9.0;
(6) be cooled to 38-40 DEG C, regulate the pH>9.0 of final product, discharging.
The terminal of muddy method detection reaction liquid of the present invention, instills by reaction solution in the water of 25 DEG C, observes white vaporific form and occurs, treat that white vaporific form occurs being reaction end.
Preparation method of the present invention, synthesis techniques that " alkali-acid-alkali " urea not adopting urea-formaldehyde resin traditional divides 3 times or 4 times to add, but under basic conditions, formaldehyde divides 2 times, the carrying out synthesis preparation added of urea 1 property.
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 present invention, bonding property is good, and cost is low; Glue is simple to operate, and production efficiency is high; Use the wood-based plate of this adhesive producing, not only there is stronger humidity resistance, and the thickness swelling rate of sheet material is very low.Greatly expand environment for use and the use range of wood-based plate, extend the work-ing life of sheet material simultaneously.
Embodiment
Below in conjunction with concrete embodiment, the present invention will be further described, and to make those skilled in the art understand the present invention better, but the present invention is not limited to following examples.
embodiment 1
A kind of high moistureproof urea-formaldehyde resin adhesive, comprises the raw material of following parts by weight:
45 parts, formaldehyde, 1 part, water, 22 parts, urea, composite assistant 8 parts, sodium methyl silicate 0.1 part;
Described composite assistant weight and number are: polyvinyl alcohol 0.1 part, trimeric cyanamide 1 part, ethylene glycol 1 part.
embodiment 2
A kind of high moistureproof urea-formaldehyde resin adhesive, comprises the raw material of following parts by weight:
55 parts, formaldehyde, 18 parts, water, 30 parts, urea, composite assistant 30 parts, sodium methyl silicate 0.5 part;
Described composite assistant weight and number are: polyvinyl alcohol 1 part, trimeric cyanamide 95 parts, ethylene glycol 10 parts.
embodiment 3
A kind of high moistureproof urea-formaldehyde resin adhesive, comprises the raw material of following parts by weight:
50 parts, formaldehyde, 10 parts, water, 16 parts, urea, composite assistant 19 parts, sodium methyl silicate 0.3 part;
Described composite assistant weight and number are: polyvinyl alcohol 0.5 part, trimeric cyanamide 45 parts, ethylene glycol 5 parts.
embodiment 4
A kind of high moistureproof urea-formaldehyde resin adhesive, comprises the raw material of following parts by weight:
45 parts, formaldehyde, 18 parts, water, 30 parts, urea, composite assistant 30 parts, sodium methyl silicate 0.5 part;
Described composite assistant weight and number are: polyvinyl alcohol 0.1 part, trimeric cyanamide 95 parts, ethylene glycol 9 parts.
embodiment 5
The preparation method of the moistureproof urea-formaldehyde resin adhesive of the height of preparation disclosed in above-described embodiment, comprising:
Formaldehyde solution 300kg and 170kg water are dropped into reactor, and after stirring, heat up heating, and use the aqueous sodium hydroxide solution of 30% concentration to adjust reacting solution pH value is 9.2-9.4 simultaneously; When being warming up to 40 DEG C, stopping heating, start to add composite assistant (polyvinyl alcohol 1kg, trimeric cyanamide 250kg, ethylene glycol 20kg), after interpolation, continue the heating that heats up; Be heated to 90 DEG C.90-93 DEG C of insulation 50 minutes.The pH of acidometer detection reaction solution, maintains solution ph and is greater than 9.0.Add secondary formaldehyde 200kg, after 10min, add urea 230kg, 70-72 DEG C of reaction.Use the terminal of muddy method detection reaction liquid, reaction solution is instilled in the water of 25 DEG C, observe white vaporific form and occur, until white vaporific form occurs being reaction end.After reaching reaction end, surveying pH after adding sodium methyl silicate 1kg, is 9.5-10.0 with the aqueous sodium hydroxide solution adjustment reacting solution pH value of 25% concentration.Be cooled to 38-40 DEG C, the aqueous sodium hydroxide solution of 25% concentration adjusts pH>9.0, discharging.
embodiment 6
The preparation method of the moistureproof urea-formaldehyde resin adhesive of the height of preparation disclosed in above-described embodiment, comprising:
Formaldehyde 1200kg and 600kg water are dropped into reactor, and after stirring, heat up heating, and use the aqueous sodium hydroxide solution of 30% concentration to adjust reacting solution pH value is 9.2-9.4 simultaneously; When being warming up to 40 DEG C, stopping heating, start to add composite assistant (polyvinyl alcohol 3kg, trimeric cyanamide 1000kg, ethylene glycol 90kg), after interpolation, continue the heating that heats up; Be heated to 90 DEG C.90-93 DEG C of insulation 50 minutes.The pH of acidometer detection reaction solution, maintains solution ph and is greater than 9.0.Add secondary formaldehyde 550kg, after 10min, add urea 900kg, 70-72 DEG C of reaction.Use the terminal of muddy method detection reaction liquid, reaction solution is instilled in the water of 25 DEG C, observe white vaporific form and occur, until white vaporific form occurs being reaction end.After reaching reaction end, surveying pH after adding sodium methyl silicate 4kg, is 9.5-10.0 with the aqueous sodium hydroxide solution adjustment reacting solution pH value of 25% concentration.Be cooled to 38-40 DEG C, the aqueous sodium hydroxide solution of 25% concentration adjusts pH>9.0, discharging.
embodiment 7
The preparation method of the moistureproof urea-formaldehyde resin adhesive of the height of preparation disclosed in above-described embodiment, comprising:
One formaldehyde 1200kg and 600kg water are dropped into reactor, and after stirring, heat up heating, and use the aqueous sodium hydroxide solution of 30% concentration to adjust reacting solution pH value is 9.2-9.4 simultaneously; When being warming up to 40 DEG C, stopping heating, start to add composite assistant (polyvinyl alcohol 3kg, trimeric cyanamide 1300kg, ethylene glycol 90kg), after interpolation, continue the heating that heats up; Be heated to 90 DEG C.90-93 DEG C of insulation 50 minutes.The pH of acidometer detection reaction solution, maintains solution ph and is greater than 9.0.Add secondary formaldehyde 600kg, after 10min, add urea 1000kg, 70-72 DEG C of reaction.Use the terminal of muddy method detection reaction liquid, reaction solution is instilled in the water of 25 DEG C, observe white vaporific form and occur, until white vaporific form occurs being reaction end.After reaching reaction end, surveying pH after adding sodium methyl silicate 4kg, is 9.5-10.0 with the aqueous sodium hydroxide solution adjustment reacting solution pH value of 25% concentration.Be cooled to 38-40 DEG C, the aqueous sodium hydroxide solution of 25% concentration adjusts pH>9.0, discharging.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent flow process conversion utilizing description of the present invention to do, or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (6)
1. a high moistureproof urea-formaldehyde resin adhesive, is characterized in that, is made up of the raw material of following parts by weight:
Formaldehyde 45-55 part, water 1-18 part, urea 22-30 part, composite assistant 8-30 part, sodium methyl silicate 0.1-0.5 part.
2. the moistureproof urea-formaldehyde resin adhesive of height according to claim 1, it is characterized in that, described composite assistant is mixed by polyvinyl alcohol, trimeric cyanamide and ethylene glycol, wherein polyvinyl alcohol 0.1-1 weight part, trimeric cyanamide 1-95 weight part, ethylene glycol 1-10 weight part.
3. prepare the method for high moistureproof urea-formaldehyde resin adhesive as claimed in claim 1 or 2, it is characterized in that, comprise the steps:
(1) formaldehyde solution of total formaldehyde amount 60-70% and water are dropped into reactor, after stirring, heat up heating, and the aqueous sodium hydroxide solution adjustment reacting solution pH value of working concentration 20-30% is 9.2-9.4 simultaneously;
(2) be warming up to 40 DEG C, stop heating, add composite assistant, continue the heating that heats up, to 90-93 DEG C of insulation 50min;
(3) acidometer detects the pH value of solution, and adjustment pH>9.0 adds remaining formaldehyde solution;
(4) add urea, be cooled to 70 DEG C, 70-72 DEG C of reaction to terminal, the terminal of muddy method detection reaction liquid;
(5), after reaching reaction end, adjusting reacting solution pH value with the aqueous sodium hydroxide solution of 20-30% concentration after adding sodium methyl silicate is 8.0-9.0;
(6) be cooled to 38-40 DEG C, regulate the pH>9.0 of final product, discharging.
4. preparation method according to claim 3, is characterized in that, in step (2), add composite assistant, continue heat up heat-up time be 30 ~ 50min.
5. preparation method according to claim 3, is characterized in that, the described muddy some method of step (4), instills by reaction solution in the water of 25 DEG C, observes white vaporific form and occurs, treat that white vaporific form occurs being reaction end.
6. preparation method according to claim 3, is characterized in that, the aqueous sodium hydroxide solution of described 20-30% is mass percent concentration.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111171770A (en) * | 2018-11-09 | 2020-05-19 | 青岛科技大学 | Synergistic silicon modified phenolic resin adhesive and preparation of recombined wood thereof |
| CN115477914A (en) * | 2022-10-21 | 2022-12-16 | 昆明黄才平科技有限公司 | Moisture-proof adhesive and preparation method thereof |
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| US20030004298A1 (en) * | 2001-03-23 | 2003-01-02 | Zhu Huide Dennis | 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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2014
- 2014-10-29 CN CN201410587643.0A patent/CN104479601B/en active Active
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| US20030004298A1 (en) * | 2001-03-23 | 2003-01-02 | Zhu Huide Dennis | 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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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111171770A (en) * | 2018-11-09 | 2020-05-19 | 青岛科技大学 | Synergistic silicon modified phenolic resin adhesive and preparation of recombined wood thereof |
| 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 |
| CN115477914A (en) * | 2022-10-21 | 2022-12-16 | 昆明黄才平科技有限公司 | Moisture-proof adhesive and preparation method 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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| CN104479601B (en) | 2017-07-14 |
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