CN100350012C - Urea resin additive - Google Patents
Urea resin additive Download PDFInfo
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- CN100350012C CN100350012C CNB2006100386591A CN200610038659A CN100350012C CN 100350012 C CN100350012 C CN 100350012C CN B2006100386591 A CNB2006100386591 A CN B2006100386591A CN 200610038659 A CN200610038659 A CN 200610038659A CN 100350012 C CN100350012 C CN 100350012C
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- urea
- formaldehyde resin
- resin additive
- attapulgite
- flap
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- Chemical And Physical Treatments For Wood And The Like (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The present invention discloses a urea-formaldehyde resin additive having the key point of a technical scheme that the ingredients of the urea-formaldehyde resin additive comprise the following components: active attapulgite clay, magnesium oxide, polyvinyl alcohol, polyacrylamide and sodium dodecanesulphonate. After the ingredients are mixed, the ingredients are jointly ground into powder, and the powder is packed into a finished product of the urea-formaldehyde resin additive. The urea-formaldehyde resin additive is a neutral filler with active mineral matter and high molecules. The urea-formaldehyde resin additive is suitable for being added to urea-formaldehyde resin when various artificial board mateirals are produced to enhance the inner quality of the urea-formaldehyde resin and lower the release amount of formaldehyde, and environment pollution is reduced.
Description
Technical field:
The present invention relates to tackiness agent, be specifically related to a kind of urea-formaldehyde resin additive and preparation method thereof.
Background technology:
Along with the extensive application of wood-based plate at building decoration and furniture industry, people are more and more closer with contacting of wood-based plate, so the environment-friendly quality of wood-based plate also more and more is subject to people's attention and pays close attention to.The wood-based plate of Chu Shouing is to use urea-formaldehyde resin to produce more than 90% in the market, all the time, urea-formaldehyde resin is owing to simple, cheap, colourless, the good water solubility of preparation and bonding strength is high is widely used, but its each stage after making, use and solidifying all can discharge formaldehyde, even after decorating processing, still have free formaldehyde to discharge, cause indoor environmental pollution.And the release of the free formaldehyde in the wood-based plate slowly, is the peak period in 3 years, is the paracme in 3～15 years, could remove problem of environment pollution caused in its release after 15 years.It is just more serious to be engaged in the harm that the laborer of Wood-based Panel Production work is subjected to, and for a long time works under the environment of high-concentration formaldehyde content, and the probability of generation tetter even cancer is more much bigger than ordinary person.
Particularly China's living standards of the people improve in recent years; make everybody more and more higher to the degree of concern of living environment and health; country has also issued that in calendar year 2001 new compulsory standard comes the objectionable impurities of confinement cells interior trim finishing material to discharge; main raw as the indoor decorating use of present China; the formaldehyde emission problem of wood-based plate is urgently put in face of us; addressing this problem singly is not protection people's living environment and healthy, also has vast market prospect and profit margin simultaneously.
Chinese patent publication number CN 1062541, open day is on January 24th, 1992, name is called " AU formaldehyde catching agent producing process ", it discloses " a kind of formaldehyde-trapping agent that is used for urea-formaldehyde resin; be referred to as the AU formaldehyde-trapping agent; it is that clay Attapulgite and aqueous solution of urea by microcrystalline porous structure is mixed and made into, and it is the 11-15% of urea-formaldehyde resin with China ink (by weight).When the AU trapping agent is used for the urea-formaldehyde resin extrusion chipboard, can be under the condition of the physical and mechanical property that does not reduce shaving board, the burst size of methanal of reduction plate by a relatively large margin.Has the advantage easy to operate, that cost is low, effective ".
The foregoing invention weak point is:
1, its technology is that attapulgite is broken to 200-300 purpose fineness, and under 250-300 ℃, handled 1-3 hour, this technology is fine in experiment, and in actual industrial production, can't carry out, because the proportion of Attapulgite is lighter, after attapulgite is broken to 200-300 purpose fineness, it is a kind of thinner meal, be difficult in and carry out large-batch processing under 250-300 ℃, have only earlier with the Attapulgite raw ore 250-300 ℃ handle down after, again attapulgite is broken to 200-300 purpose fineness.
2, Attapulgite was just handled 1-3 hour down at 250-300 ℃ after not carrying out acidification, and the activity degree of Attapulgite is lower, mixes with aqueous solution of urea, and the effect of catching formaldehyde can decrease.
Summary of the invention:
The objective of the invention is to overcome weak point in the prior art, a kind of formaldehyde that not only can adsorb in the wood-based plate is provided, can also increase wood-based plate viscosifying power and urea-formaldehyde resin additive that reduces production costs and preparation method thereof.
Urea-formaldehyde resin additive is made up of activated attapulgite, magnesium oxide, polyvinyl alcohol, polyacrylamide and sodium laurylsulfonate.
Attapulgite clay is to be a kind of clay pit of main ingredient with the attapulgite, and density is 2.05～2.30,2～3 grades of Mohs' hardness, be viscosity and plasticity-when moist, its viscosity can reach more than the 3000mPas, and dry shrinkage is little, and do not produce be full of cracks, water-absorbent is strong, and specific surface area is at 350m
2More than/the g, stable electrochemical property is difficult for being flocculated by ionogen.
Activated attapulgite, be to add in the attapulgite clay with sulfuric acid to carry out acidifying, be activated attapulgite through high-temperature roasting again, the specific surface area of activation back attapulgite clay is than not increased by 25～45% before the activation, the surface of attapulgite clay rhabdolith structure is uneven, attapulgite clay has formed a large amount of micropores each other, and the ability that makes its absorption catch formaldehyde is greatly improved.
Magnesium oxide both can improve ageing-resistant performance, can improve water tolerance again.
Polyvinyl alcohol has good snappiness, elasticity and unique powerful adhesiveproperties, adds polyvinyl alcohol in urea-formaldehyde resin, helps improving the bonding and ageing-resistant performance of urea-formaldehyde resin.
Polyacrylamide has stronger suction and water retention property, is used for wood-based plate, can improve the intensity after wood-based plate bonds, and reduces the urea-formaldehyde resin glue too to the immersion of wood-based plate inside, improves the water tolerance and the utilization ratio of urea-formaldehyde resin.
Sodium laurylsulfonate is a kind of surfactant, it can reduce the surface tension of urea-formaldehyde resin glue, air is disperseed in glue easily, form stable foam, increase the volume of glue, and can prevent that the too much inside that is penetrated into timber of glue from causing local starved, and can save glue consumption, reduce production costs.
The present invention is achieved by following technical proposals:
1, the production method of activated attapulgite is:
1. the preparation of dilute sulphuric acid is made up of following component by weight percentage: the sulfuric acid 3～5% of concentration 98%, water 95～97%;
2. the batching of acidification is made up of following component by weight percentage: attapulgite clay raw ore 55～65%, and dilute sulphuric acid 35～45% slowly adds dilute sulphuric acid and to carry out acidification in the attapulgite clay raw ore;
3. extruding: with Concavo-convex excellent stone clay after the acidify, push by extrusion machine and to be flap, the thickness of flap≤3 millimeter;
4. roasting: the flap of attapulgite clay is transported to and carries out roasting in the stoving oven, and roasting time is 1.5～3 hours, and maturing temperature is controlled at 320～450 ℃, and the attapulgite clay flap after the roasting is an activated attapulgite.
2, the preparation method of urea-formaldehyde resin additive is:
1. the batching of urea-formaldehyde resin additive is made up of following component: activated attapulgite 80～96%, magnesium oxide 2～10%, polyvinyl alcohol 1～5%, polyacrylamide 0.5～3% and sodium laurylsulfonate 0.5～2% by weight percentage.
2. after the batch mixes with urea-formaldehyde resin additive, be transported to grinding machine and carry out abrasive dust, particle fineness is controlled at 0.074～0.105 millimeter, is packaged as the finished product of urea-formaldehyde resin additive.
Urea-formaldehyde resin additive is a kind of have active mineral matter, high molecular formaldehyde-trapping agent and inert filler, mix the back with urea-formaldehyde resin and form the suspended dispersed body, can prevent that the urea-formaldehyde resin glue from producing layering and precipitating, can weaken the stress concentration that causes owing to the glue-line volumetric shrinkage, thus the phenomenon that causes coming unglued and come off.In the production process of making wood-based plate, it can prevent that not only urea-formaldehyde resin from too infiltrating in the timber, have suction and water retention preferably,, improve tensile strength and bonding strength to reduce the water-intake rate of goods, prolong the working life of glue, save the usage quantity of urea-formaldehyde resin, reduce production costs, improve the ageing-resistant performance of urea-formaldehyde resin and improve the quality of gluing together, and can also reduce the content of free formaldehyde, reduce and pollute, improve work situation.
In the production process of wood-based plate, after urea-formaldehyde resin adds urea-formaldehyde resin additive, can improve 10～25% viscosifying power of wood-based plate, and make burst size of methanal in the wood-based plate reduce by 75～95% and save 20～35% production cost.
Urea-formaldehyde resin additive is applicable to when producing various artificial board, is added in the urea-formaldehyde resin, with inner quality that improves urea-formaldehyde resin and the burst size that reduces formaldehyde, reduces environmental pollution.
Embodiment:
Below in conjunction with embodiment, the invention will be further described:
1, the production method of activated attapulgite is:
1. the preparation of dilute sulphuric acid is made up of following component by weight percentage: the sulfuric acid 3% of concentration 98%, water 97%;
2. the batching of acidification is made up of following component by weight percentage: attapulgite clay raw ore 55%, and dilute sulphuric acid 45% slowly adds dilute sulphuric acid and to carry out acidification in the attapulgite clay raw ore;
3. extruding: with Concavo-convex excellent stone clay after the acidify, push by extrusion machine and to be flap, the thickness of flap≤3 millimeter;
4. roasting: the flap of attapulgite clay is transported to and carries out roasting in the stoving oven, and roasting time is 2.5 hours, and maturing temperature is controlled at 320～350 ℃, and the attapulgite clay flap after the roasting is an activated attapulgite.
2, the preparation method of urea-formaldehyde resin additive is:
1. the batching of urea-formaldehyde resin additive is made up of following component: activated attapulgite 90%, magnesium oxide 5%, polyvinyl alcohol 2%, polyacrylamide 2% and sodium laurylsulfonate 1% by weight percentage.
2. after the batch mixes with urea-formaldehyde resin additive, be transported to grinding machine and carry out abrasive dust, particle fineness is controlled at 0.074 millimeter, is packaged as the finished product of urea-formaldehyde resin additive.
Claims (2)
1, a kind of urea-formaldehyde resin additive, it is characterized in that, the batching of urea-formaldehyde resin additive is made up of following component: activated attapulgite 80～96%, magnesium oxide 2～10%, polyvinyl alcohol 1～5%, polyacrylamide 0.5～3% and sodium laurylsulfonate 0.5～2% by weight percentage; The production method of activated attapulgite is: 1. the preparation of dilute sulphuric acid is made up of following component by weight percentage: the sulfuric acid 3～5% of concentration 98%, water 95～97%; 2. the batching of acidification is made up of following component by weight percentage: attapulgite clay raw ore 55～65%, and dilute sulphuric acid 35～45% slowly adds dilute sulphuric acid and to carry out acidification in the attapulgite clay raw ore; 3. extruding: with Concavo-convex excellent stone clay after the acidify, push by extrusion machine and to be flap, the thickness of flap≤3 millimeter; 4. roasting: the flap of attapulgite clay is transported to and carries out roasting in the stoving oven, and roasting time is 1.5～3 hours, and maturing temperature is controlled at 320～450 ℃, and the attapulgite clay flap after the roasting is an activated attapulgite.
2, the preparation method of urea-formaldehyde resin additive according to claim 1, it is characterized in that, after the batch mixes with urea-formaldehyde resin additive, be transported to grinding machine and carry out abrasive dust, particle fineness is controlled at 0.074～0.105 millimeter, is packaged as the finished product of urea-formaldehyde resin additive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100386591A CN100350012C (en) | 2006-03-07 | 2006-03-07 | Urea resin additive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100386591A CN100350012C (en) | 2006-03-07 | 2006-03-07 | Urea resin additive |
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| CN1834183A CN1834183A (en) | 2006-09-20 |
| CN100350012C true CN100350012C (en) | 2007-11-21 |
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| CNB2006100386591A Expired - Fee Related CN100350012C (en) | 2006-03-07 | 2006-03-07 | Urea resin additive |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101012358B (en) * | 2007-02-05 | 2011-02-02 | 永港伟方（北京）科技股份有限公司 | Increment agent for urea-formaldehyde resin, preparing method thereof and urea-formaldehyde resin adhesive |
| CN101570605B (en) * | 2008-04-28 | 2013-03-06 | 中国矿业大学 | Compounded additive of pollopas and preparation method thereof |
| CN101585926B (en) * | 2009-04-20 | 2012-02-01 | 永港伟方（北京）科技股份有限公司 | Urea-formaldehyde resin additive, preparing method and application thereof |
| CN102086361B (en) * | 2010-06-28 | 2013-09-18 | 永港伟方（北京）科技股份有限公司 | High-efficiency extender for environmentally-friendly urea formaldehyde resin, and preparation and use thereof |
| CN103740052B (en) * | 2013-12-09 | 2015-11-18 | 辽宁盖亚科技开发有限责任公司 | Water sucting glue and preparation method thereof, application |
| CN106590466A (en) * | 2016-12-17 | 2017-04-26 | 浦北县建业胶合板有限责任公司 | Urea resin filler for plywood and preparation method thereof |
| CN106675471A (en) * | 2016-12-17 | 2017-05-17 | 浦北县建业胶合板有限责任公司 | Adhesive for indoor plywood and preparation method of adhesive |
| CN109504325A (en) * | 2018-12-13 | 2019-03-22 | 柳州市荣森新型材料科技有限公司 | A kind of ageing-resistant urea-formaldehyde resin adhesive and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062541A (en) * | 1992-01-24 | 1992-07-08 | 中国林业科学院林产化学工业研究所 | AU formaldehyde catching agent producing process |
| CN1506427A (en) * | 2002-12-12 | 2004-06-23 | 上海鹰翔实业有限公司 | Multifunctional carpentery stuffing and its compounding process |
| CN1623747A (en) * | 2004-12-13 | 2005-06-08 | 东南大学 | Artificial board of straw non-wood plant fibre and its preparation process |
| CN1730516A (en) * | 2005-08-26 | 2006-02-08 | 许盛英 | Attapulgite gel filling agent |
-
2006
- 2006-03-07 CN CNB2006100386591A patent/CN100350012C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062541A (en) * | 1992-01-24 | 1992-07-08 | 中国林业科学院林产化学工业研究所 | AU formaldehyde catching agent producing process |
| CN1506427A (en) * | 2002-12-12 | 2004-06-23 | 上海鹰翔实业有限公司 | Multifunctional carpentery stuffing and its compounding process |
| CN1623747A (en) * | 2004-12-13 | 2005-06-08 | 东南大学 | Artificial board of straw non-wood plant fibre and its preparation process |
| CN1730516A (en) * | 2005-08-26 | 2006-02-08 | 许盛英 | Attapulgite gel filling agent |
Non-Patent Citations (1)
| Title |
|---|
| 脲醛树脂改性机理及措施 叶云等.广州化工，第32卷第3期 2004 * |
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| CN1834183A (en) | 2006-09-20 |
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