CN1062541A - AU formaldehyde catching agent producing process - Google Patents
AU formaldehyde catching agent producing process Download PDFInfo
- Publication number
- CN1062541A CN1062541A CN 92107276 CN92107276A CN1062541A CN 1062541 A CN1062541 A CN 1062541A CN 92107276 CN92107276 CN 92107276 CN 92107276 A CN92107276 A CN 92107276A CN 1062541 A CN1062541 A CN 1062541A
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- CN
- China
- Prior art keywords
- urea
- formaldehyde
- trapping agent
- formaldehyde resin
- attapulgite
- Prior art date
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The present invention is a kind of formaldehyde-trapping agent that is used for urea-formaldehyde resin, is referred to as the AU formaldehyde-trapping agent, and it is that clay Attapulgite and aqueous solution of urea by microcrystalline porous structure is mixed and made into.It is 11-15% of a 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.
Description
The present invention relates to the formaldehyde catching agent producing process of a kind of wood-based plate with urea-formaldehyde resin.
For avoiding environmental pollution and harm people's health, at present domestic more and more low with the burst size of methanal requirement of urea-formaldehyde resin to wood-based plate.As West Germany shaving board is divided into three grades (being E1, E2 and E3 level), the burst size of methanal of wherein indoor V shaving board (E level) regulation plate should be less than the 10mg/100g(perforation method).Reduce the burst size of methanal of shaving board, effective means is the formaldehyde and the mol ratio of urea that reduces urea-formaldehyde resin, but the low excessively physical and mechanical property decline that tends to cause shaving board of mol ratio.Therefore, for obtaining the low shaving board of burst size of methanal, also need usually wood-based plate is carried out aftertreatment (as handling with ammonia mood or urea liquid), or in urea-formaldehyde resin, add formaldehyde-trapping agent.The formaldehyde-trapping agent kind of having reported is a lot, as volatile salt (EP13,372), urea and polymer glycan share (EP94,797), urea (DE2,917,159), pasted starch and urea share (U, S, 4,397,756) and the FR-4514 that uses of A, B, CasCo company, useful more multiple unsaturated and (DE3,733,630) such as saturated carboxylic acid, urea and ammoniacal liquor.The adding of these trapping agent, the meeting that has reduces curing reaction of urea formaldehyde resin speed, and then influences the physical and mechanical property of plate, and the then cost that has is higher.
The present invention is exactly the problem at above-mentioned existence, a kind of new AU formaldehyde-trapping agent is proposed, this trapping agent is a kind of many magnesium clays that urea is called Attapulgite that absorbed, because this clay contains the feature of fine geode, entering urea in the geode can not influence original performance of original urea-formaldehyde resin in the pressing plate process, therefore its adding can not reduce the physical and mechanical property of shaving board, and the price of this clay is lower than urea.
AU trapping agent of the present invention is like this preparation: a kind of containing of microcrystalline porous structure many magnesium clays of containing claim Attapulgite as carrier.Attapulgite is broken to 200-300 purpose fineness, and handled 1-3 hour down, should note during preservation no longer absorbing water at 250-300 ℃.The water ratio of its sample should be 0%.With the raw material of urea conduct with formaldehyde reaction, then urea is made into the aqueous solution, mix to stir evenly with Attapulgite and make.The ratio of Attapulgite and urea is 1: 1 to 1: 2, is preferably 1: 1 to 1: 1.5.The urea-formaldehyde resin consumption is the 8.5-9.5% of shaving board during pressing plate, and AU trapping agent consumption is counted the 11-15% of Precondensed UreaFormaldehyde Resin liquid weight with amount of solid.
AU trapping agent of the present invention is applicable to the urea-formaldehyde resin of various different sortses and different purposes.Be particularly suitable for the used for shaving board low formaldehyde release volume urea formaldehyde resin.Adduction mixed when the AU trapping agent used at urea-formaldehyde resin.
Use AU formaldehyde-trapping agent of the present invention, can be at the physical and mechanical property that does not reduce shaving board and not increasing under the prerequisite of cost, with the formaldehyde of the shaving board 30-50% that high-volume descends.
The burst size of methanal of shaving board is measured by standard GB 4905-85.The physical and mechanical property of shaving board is measured by standard GB 4899-4903-85.
Example 1,
The preparation of AU trapping agent: attapulgite clay is crushed to 200 order powder.As for 250 ℃ of processing 3 hours, cool off standby.Get above-mentioned powder 100 grams, add the aqueous solution that is made into by 100 gram urine aldehyde, mix, promptly get the AU formaldehyde-trapping agent.
Get 100 parts of the LF-3 type urea-formaldehyde resins (Inst. of Chemical Industry on Forest Products, Chinese Academy of Forestry Scien's development) of low mol ratio, adding 11 parts of trapping agent of AU (in amount of solid) stir.The urea-formaldehyde resin consumption is 9% of wood shavings.The pressing plate condition is 200 ℃, and unit is 2.94N/mm
2, be 4 minutes clamping time, thickness of slab 19mm, wood shavings are pine.The physical and mechanical property and the burst size of methanal of shaving board were listed in table 1 before and after the AU trapping agent added.
Example 2,
With example 1, but the pressing plate time change 3.5 minutes into, the physical and mechanical property and the burst size of methanal of its plate are listed in table 1.
Example 3,
With example 1, wood shavings use pine instead and hard assorted wood mixes wood shavings, and be 4.5 minutes clamping time.The physical and mechanical property and the burst size of methanal of plate are listed in table 1.
Example 4,
With example 3, urea-formaldehyde resin is used No. 4 urea-formaldehyde resins of LF-3 type of Chinese forest-science academy chemistry of forest product Research Institute instead, the results are shown in table 1.
Example 5,
With example 1, but attapulgite is broken to 200 orders, handles 2 hours at 275 ℃, and Attapulgite is 1: 1.5 with the urea ratio.Used Precondensed UreaFormaldehyde Resin changes LF-2 type (Chinese forest-science academy chemistry of forest product Research Institute plant produced) into, and be 4.5 minutes clamping time, and AU trapping agent consumption is counted 13% of urea-formaldehyde resin liquid weight with solid, the results are shown in table 1.
Example 6,
With example 5, Attapulgite 300 orders were handled 1 hour at 300 ℃, and Attapulgite is 1: 2.0 with the urea ratio, and AU trapping agent add-on is counted 15% of urea-formaldehyde resin liquid weight with amount of solid, the results are shown in table 1.
The physical and mechanical property of table 1, examples preparation shaving board
Example AU catches the anti-water sucting thickness formaldehyde in the quiet bent plane of water ratio density and releases
Catch agent (%) (g/cm
3) intensity draws the intensity rate of expansion high-volume
(N/mm
2) (N/mm
2) (%) 20 ℃ of water (mg/100g)
2 hours 24 hours
1 adds 5.3 0.68 19.8 0.49 1.4 5.7 5.48
Do not add 6.0 0.69 19.6 0.54 3.3 14.8 7.45
2 add 6.2 0.70 19.7 0.52 1.2 5.2 6.08
Do not add 7.9 0.75 26.9 0.88 1.4-10.65
3 add 5.8 0.71 20.7 0.50 3.8-5.17
Do not add 5.2 0.71 19.3 0.48 4.4-7.78
4 add 6.0 0.70 19.0 0.59 3.8-5.47
Do not add 6.3 0.68 19.6 0.57 3.8-8.68
5 add 5.7 0.73 18.7 0.59 5.2-8.62
Do not add 5.9 0.69 17.7 0.66 3.0-14.38
6 add 4.7 0.74 19.5 0.64 5.3-8.47
Do not add 5.9 0.69 17.7 0.66 3.0-14.38
Claims (3)
1, the AU formaldehyde resin trapping agent used of a kind of urea-formaldehyde resin is characterized by:
(1) a kind of containing of microcrystalline porous structure of many magnesium clays that contain are called Attapulgite as carrier.
(2) with the raw material of urea conduct with formaldehyde reaction.
(3) Attapulgite is 1: 1～2 with the ratio of the weight of urea.
(4) urea is made into the aqueous solution and Attapulgite is mixed and made into.
(5) consumption of AU formaldehyde-trapping agent is the 11-15% of urea-formaldehyde resin liquid weight with the solid batch box.
2, according to AU formaldehyde-trapping agent in the claim 1, it is characterized by: used attapulgite clay needs process to be crushed to 200-300 order fineness, and handled 1-3 hour down at 250-300 ℃.
3, AU formaldehyde-trapping agent according to claim 1 is characterized by AU trapping agent adduction when urea-formaldehyde resin uses and mixes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92107276 CN1062541A (en) | 1992-01-24 | 1992-01-24 | AU formaldehyde catching agent producing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92107276 CN1062541A (en) | 1992-01-24 | 1992-01-24 | AU formaldehyde catching agent producing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1062541A true CN1062541A (en) | 1992-07-08 |
Family
ID=4942772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92107276 Pending CN1062541A (en) | 1992-01-24 | 1992-01-24 | AU formaldehyde catching agent producing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1062541A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100350012C (en) * | 2006-03-07 | 2007-11-21 | 许盛英 | Urea resin additive |
| CN100532486C (en) * | 2006-03-31 | 2009-08-26 | 中国科学院过程工程研究所 | Adhesive for absorbing formol |
| CN101428172B (en) * | 2008-11-04 | 2011-06-01 | 陕西科技大学 | Methanal capturing agent and preparation method thereof |
| CN1736517B (en) * | 2004-08-20 | 2011-06-01 | 中国科学院过程工程研究所 | Formaldehyde collecting agent and preparation process thereof |
| CN101570605B (en) * | 2008-04-28 | 2013-03-06 | 中国矿业大学 | Compounded additive of pollopas and preparation method thereof |
| CN105291244A (en) * | 2013-08-28 | 2016-02-03 | 钱秀英 | Production method of dampproof ceiling decoration density plate |
| CN107108783A (en) * | 2014-11-17 | 2017-08-29 | 3M创新有限公司 | Polymeric material for trapping formaldehyde |
-
1992
- 1992-01-24 CN CN 92107276 patent/CN1062541A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1736517B (en) * | 2004-08-20 | 2011-06-01 | 中国科学院过程工程研究所 | Formaldehyde collecting agent and preparation process thereof |
| CN100350012C (en) * | 2006-03-07 | 2007-11-21 | 许盛英 | Urea resin additive |
| CN100532486C (en) * | 2006-03-31 | 2009-08-26 | 中国科学院过程工程研究所 | Adhesive for absorbing formol |
| CN101570605B (en) * | 2008-04-28 | 2013-03-06 | 中国矿业大学 | Compounded additive of pollopas and preparation method thereof |
| CN101428172B (en) * | 2008-11-04 | 2011-06-01 | 陕西科技大学 | Methanal capturing agent and preparation method thereof |
| CN105291244A (en) * | 2013-08-28 | 2016-02-03 | 钱秀英 | Production method of dampproof ceiling decoration density plate |
| CN107108783A (en) * | 2014-11-17 | 2017-08-29 | 3M创新有限公司 | Polymeric material for trapping formaldehyde |
| US10391471B2 (en) | 2014-11-17 | 2019-08-27 | 3M Innovative Properties Company | Polymeric materials for capturing formaldehyde |
| CN107108783B (en) * | 2014-11-17 | 2019-08-30 | 3M创新有限公司 | For trapping the polymer material of formaldehyde |
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Legal Events
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |