CN102898986A - Melamine-modified urea-formaldehyde glue and preparation method thereof - Google Patents
Melamine-modified urea-formaldehyde glue and preparation method thereof Download PDFInfo
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- CN102898986A CN102898986A CN2012103602333A CN201210360233A CN102898986A CN 102898986 A CN102898986 A CN 102898986A CN 2012103602333 A CN2012103602333 A CN 2012103602333A CN 201210360233 A CN201210360233 A CN 201210360233A CN 102898986 A CN102898986 A CN 102898986A
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Abstract
Melamine-modified urea-formaldehyde glue comprises, by mass, 200-300 parts of 37%wt of formaldehyde solutions, 3-5 parts of ammonium chloride, 0.1-0.5 part of formic acid, 100-200 parts of urea, 20-30 parts of melamine, 3-4 parts of sodium hydroxide, 5-10 parts of polyvinyl alcohol (PVA) and 1-5 parts of 50%wt of phosphoric acid. According to the urea-formaldehyde glue, water resistance is good, a board cannot chip after 3-4 months of soaking, the content of free formaldehyde is smaller than 0.3%, and the viscosity is larger than 150mPa*s.
Description
Technical field
The invention belongs to the urea-formaldehyde glue technical field, relate in particular to a kind of cyanurotriamide modified urea-formaldehyde glue, be applicable to the production of elevator car floor.
Background technology
Urea-formaldehyde glue is that urea and formaldehyde are lower in catalyzer (basic catalyst or an acidic catalyst) effect, and polycondensation becomes the initial stage urea-formaldehyde resin, and then under solidifying agent or promoter effect, form melt, insoluble resin adhesive in latter stage.Urea-formaldehyde resin (UF resin) is synthetic first by B.Tollens in 1844, after the research of C.Goldschmidt etc., use first before and after 1896, nineteen twenty-nine IG company has developed and has been named as Kanrit Leim and can at the UF of ambient cure veneer(ed) wood resin condensation intermediate, causes people's attention.Along with the develop rapidly of science and technology, the production technique new technology of urea-formaldehyde glue grows with each passing hour, and improves constantly on original traditional basis, formaldehyde, urea and glue get precious as main raw material, adopt before acid adjustment 20 minutes, and vast scale adds glue and gets precious, after the acid adjustment, the pH value is adjusted 7-7.5.Low, the reduction content of free aldehyde of urea-formaldehyde glue good performance indexes, production cost of employing new technology and producing.At present, because the manufacturing of urea-formaldehyde glue new technology is simple, easy to use, with low cost, functional, become the main glue kind of China's Wood-based Panel Production, accounted for the wood-based plate glue consumption more than 90%.Trimeric cyanamide also is a kind of widely used chemical feedstocks, and itself and formaldehyde condensation polymerization can make melamine resin, can be used for plastics and coatings industry, also can do the anti-Zhe of yarn fabric, anti-shrinking agent.Its modified resin can be done lovely luster, durable, metallic paint that hardness is good.It also can be used for firm, heat-resisting fancy veneer, the skin agent of tanning of building paper and grey leather, the caking agent of synthesizing fireproof laminate, the fixing agent of water-resisting agent or stiffening agent etc.
Summary of the invention
The technical problem that solves:The invention provides a kind of cyanurotriamide modified urea-formaldehyde glue that utilizes, water resistance is good, after sheet material soaks 3～4 months, does not still come unglued, and free formaldehyde content is low, and viscosity is moderate.
Technical scheme:Cyanurotriamide modified urea-formaldehyde glue comprises in mass parts: 200～300 parts of 37%wt formaldehyde solutions, 3～5 parts of ammonium chlorides, 0.1～0.5 part in formic acid, 100～200 parts in urea, 20～30 parts of trimeric cyanamides, 3～4 parts in sodium hydroxide, 5～10 parts of polyvinyl alcohol, 50%wt phosphatase 11～5 part.
Preferred version 1: comprise in mass parts: 250 parts of 37%wt formaldehyde solutions, 5 parts of ammonium chlorides, 0.5 part in formic acid, 200 parts in urea, 20 parts of trimeric cyanamides, 4 parts in sodium hydroxide, 7 parts of polyvinyl alcohol, 3 parts of 50%wt phosphoric acid.
The preparation method of cyanurotriamide modified urea-formaldehyde glue, first with 37%wt formaldehyde solution, ammonium chloride, formic acid and urea mixing post-heating to 70～100 ℃, add successively again trimeric cyanamide, sodium hydroxide part, polyvinyl alcohol and phosphoric acid in batches, low whipping speed is under 1500 rev/mins of conditions, naturally cools to room temperature.
Beneficial effect:
The invention provides a kind of cyanurotriamide modified urea-formaldehyde glue that utilizes, water resistance is good, after sheet material soaks 3～4 months, does not still come unglued, and free formaldehyde content is less than 0.3%, and viscosity is greater than 150mPas.
Embodiment
Embodiment 1
Cyanurotriamide modified urea-formaldehyde glue comprises in mass parts: 250 parts of 37%wt formaldehyde solutions, 5 parts of ammonium chlorides, 0.5 part in formic acid, 200 parts in urea, 20 parts of trimeric cyanamides, 4 parts in sodium hydroxide, 7 parts of polyvinyl alcohol, 3 parts of 50%wt phosphoric acid.The preparation method of cyanurotriamide modified urea-formaldehyde glue, first with 37%wt formaldehyde solution, ammonium chloride, formic acid and urea mixing post-heating to 70～100 ℃, add successively again trimeric cyanamide, sodium hydroxide part, polyvinyl alcohol and phosphoric acid in batches, low whipping speed is under 1500 rev/mins of conditions, naturally cools to room temperature.The urea-formaldehyde glue that this is cyanurotriamide modified, water resistance is good, after sheet material soaks 3～4 months, does not still come unglued, and free formaldehyde content is less than 0.3%, and viscosity is greater than 150mPas.
Embodiment 2
Cyanurotriamide modified urea-formaldehyde glue comprises in mass parts: 260 parts of 37%wt formaldehyde solutions, 4 parts of ammonium chlorides, 0.4 part in formic acid, 150 parts in urea, 25 parts of trimeric cyanamides, 5 parts in sodium hydroxide, 6 parts of polyvinyl alcohol, 3 parts of 50%wt phosphoric acid.The preparation method of cyanurotriamide modified urea-formaldehyde glue, first with 37%wt formaldehyde solution, ammonium chloride, formic acid and urea mixing post-heating to 70～100 ℃, add successively again trimeric cyanamide, sodium hydroxide part, polyvinyl alcohol and phosphoric acid in batches, low whipping speed is under 1500 rev/mins of conditions, naturally cools to room temperature.The urea-formaldehyde glue that this is cyanurotriamide modified, water resistance is good, after sheet material soaks 3～4 months, does not still come unglued, and free formaldehyde content is less than 0.2%, and viscosity is greater than 160mPas.
Claims (3)
1. cyanurotriamide modified urea-formaldehyde glue, it is characterized in that comprising in mass parts: 200～300 parts of 37%wt formaldehyde solutions, 3～5 parts of ammonium chlorides, 0.1～0.5 part in formic acid, 100～200 parts in urea, 20～30 parts of trimeric cyanamides, 3～4 parts in sodium hydroxide, 5～10 parts of polyvinyl alcohol, 50%wt phosphatase 11～5 part.
2. cyanurotriamide modified urea-formaldehyde glue according to claim 1 is characterized in that comprising in mass parts: 250 parts of 37%wt formaldehyde solutions, 5 parts of ammonium chlorides, 0.5 part in formic acid, 200 parts in urea, 20 parts of trimeric cyanamides, 4 parts in sodium hydroxide, 7 parts of polyvinyl alcohol, 3 parts of 50%wt phosphoric acid.
3. the preparation method of the described cyanurotriamide modified urea-formaldehyde glue of claim 1, it is characterized in that first with 37%wt formaldehyde solution, ammonium chloride, formic acid and urea mixing post-heating to 70～100 ℃, add successively again trimeric cyanamide, sodium hydroxide part, polyvinyl alcohol and phosphoric acid in batches, low whipping speed is under 1500 rev/mins of conditions, naturally cools to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103602333A CN102898986A (en) | 2012-09-25 | 2012-09-25 | Melamine-modified urea-formaldehyde glue and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103602333A CN102898986A (en) | 2012-09-25 | 2012-09-25 | Melamine-modified urea-formaldehyde glue and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
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| CN102898986A true CN102898986A (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012103602333A Pending CN102898986A (en) | 2012-09-25 | 2012-09-25 | Melamine-modified urea-formaldehyde glue and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106147675A (en) * | 2015-03-27 | 2016-11-23 | 秦瑛 | A kind of melamine modified urea-formaldehyde glue and production method thereof |
| CN108115801A (en) * | 2017-12-21 | 2018-06-05 | 贺州宝兴新材料有限公司 | A kind of preparation method of low formaldehyde melamine plate |
| CN108115804A (en) * | 2017-12-21 | 2018-06-05 | 贺州宝兴新材料有限公司 | A kind of production method of new melamine plate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61157567A (en) * | 1984-12-28 | 1986-07-17 | Daicel Chem Ind Ltd | Adhesive for plywood |
| CN1281884A (en) * | 1999-07-23 | 2001-01-31 | 黄树军 | Powdered adhesive for wood material |
-
2012
- 2012-09-25 CN CN2012103602333A patent/CN102898986A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61157567A (en) * | 1984-12-28 | 1986-07-17 | Daicel Chem Ind Ltd | Adhesive for plywood |
| CN1281884A (en) * | 1999-07-23 | 2001-01-31 | 黄树军 | Powdered adhesive for wood material |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106147675A (en) * | 2015-03-27 | 2016-11-23 | 秦瑛 | A kind of melamine modified urea-formaldehyde glue and production method thereof |
| CN108115801A (en) * | 2017-12-21 | 2018-06-05 | 贺州宝兴新材料有限公司 | A kind of preparation method of low formaldehyde melamine plate |
| CN108115804A (en) * | 2017-12-21 | 2018-06-05 | 贺州宝兴新材料有限公司 | A kind of production method of new melamine plate |
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Application publication date: 20130130 |