CN101880437A - Method for preparing nano modified urea resin - Google Patents
Method for preparing nano modified urea resin Download PDFInfo
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- CN101880437A CN101880437A CN2009100392115A CN200910039211A CN101880437A CN 101880437 A CN101880437 A CN 101880437A CN 2009100392115 A CN2009100392115 A CN 2009100392115A CN 200910039211 A CN200910039211 A CN 200910039211A CN 101880437 A CN101880437 A CN 101880437A
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Abstract
The invention relates to a method for preparing nano modified urea resin, and belongs to the field of fine chemical engineering. The method provided by the invention comprises mixing and modification of nano ions and urea resin, wherein the nano particles comprise one or two or mixture of over two of nano titanium dioxide, nano silicon dioxide and nano calcium carbonate. The nano particles have small particle diameter, large specific surface area and high surface energy; and the surfaces of the nano particles have a large amount of unsaturated residual bonds, so the nano particles have high reaction activity and strong bonding force with the UF resin, and can reduce the content of free formaldehyde, improve the cross-linking degree of the UF resin, play a toughening role in reducing the content of the free formaldehyde in the urea resin, improve the cross-linking degree of the UF resin and play a toughening role.
Description
One, technical field
The present invention relates to a kind of preparation method of nano modified urea resin, belong to field of fine chemical.
Two, background technology
Urea aldehyde (UF) resin adhesive is the adhesive made of synthetic resin of consumption maximum in the present timber industry, accounts for about 80% of wood adhesive.Because with the slow release formaldehyde of wood-based plate meeting that the UF resin is produced, major polluting indoor environment, therefore harmful HUMAN HEALTH reduces the focus that artificial board formaldehyde burst size has just become research.Main innovative approach at present has:: adopt low mol ratio prescription, improve synthesis technique, add various properties-correcting agent etc.The interior decoration wood-based plate generally adopts low mol ratio UF resin, and this can reduce artificial board formaldehyde burst size undoubtedly, but also can cause some adverse influences to the performance of UF resin simultaneously, as bad stability, bonding strength reduction etc.Adding weighting agent in the UF resin has certain effect to improving performance, but the weighting agent that in the past added all is the above particle of micron order, and modified effect is very little.Nano particle diameter is little, specific surface area is big, surface energy is high, and the surface exists a large amount of unsaturated residual bonds, reactive behavior height, and very strong bonding force is arranged between the UF resin, not only can reduce free formaldehyde content, improve the crosslinking degree of UF resin, can also play toughness reinforcing effect.
Three, summary of the invention
The objective of the invention is to improve the crosslinking degree of UF resin, and play toughening effect in order to reduce free formaldehyde content in the urea-formaldehyde resin.
The preparation method of a kind of nano modified urea resin provided by the invention, this method comprise with nanoparticle with carry out mixed and modifiedly with urea-formaldehyde resin, it is characterized in that described nanoparticle comprises nano titanium oxide, nano silicon, nano-calcium carbonate.
The preparation method of above-mentioned a kind of low-emission urea formaldehyde resin, wherein the nano material of Jia Ruing can also can be two kinds or above mixture for a kind of.
The preparation method of above-mentioned a kind of low-emission urea formaldehyde resin, the amount of the nano material of adding are 0～10 weight % of urea-formaldehyde resin solid content.
Four, embodiment
Embodiment one
In there-necked flask, add formaldehyde solution and the 1st batch of urea, treat that it is 7.6～8.0 with 30.0%～40.0%NaOH solution adjust pH that urea dissolves the back fully, slowly rises to certain temperature, insulation 45min in 40～60min; With 30.0%～40.0% formic acid adjust pH is 4.2～4.6, after certain hour reaches cloud point, is 7.0～7.5 with 30.0%～40.0%NaOH solution adjust pH, adds the 2nd batch of urea, at 88 ℃ of about 45min of reaction; Add the 3rd batch of urea, at 65 ℃ of insulation 20min; Adjust pH is 7.5～8.0, reduces to 40 ℃ of dischargings and obtains urea-formaldehyde resin, with nano-TiO
2Colloidal sol and the blend of synthetic UF resin adhesive, its addition is respectively 5% of UF resin solid content, and mechanical stirring 30min fully disperses it.
Embodiment two:
In there-necked flask, add formaldehyde solution and the 1st batch of urea, treat that it is 7.6～8.0 with 30.0%～40.0%NaOH solution adjust pH that urea dissolves the back fully, slowly rises to certain temperature, insulation 45min in 40～60min; With 30.0%～40.0% formic acid adjust pH is 4.2～4.6, after certain hour reaches cloud point, is 7.0～7.5 with 30.0%～40.0%NaOH solution adjust pH, adds the 2nd batch of urea, at 88 ℃ of about 45min of reaction; Add the 3rd batch of urea, at 65 ℃ of insulation 20min; Adjust pH is 7.5～8.0, reduces to 40 ℃ of dischargings and obtains urea-formaldehyde resin, with nanometer SiO
2Colloidal sol and the blend of synthetic UF resin adhesive, its addition is respectively 3% of UF resin solid content, and mechanical stirring 30min fully disperses it.
Embodiment three:
In there-necked flask, add formaldehyde solution and the 1st batch of urea, treat that it is 7.6～8.0 with 30.0%～40.0%NaOH solution adjust pH that urea dissolves the back fully, slowly rises to certain temperature, insulation 45min in 40～60min; With 30.0%～40.0% formic acid adjust pH is 4.2～4.6, after certain hour reaches cloud point, is 7.0～7.5 with 30.0%～40.0%NaOH solution adjust pH, adds the 2nd batch of urea, at 88 ℃ of about 45min of reaction; Add the 3rd batch of urea, at 65 ℃ of insulation 20min; Adjust pH is 7.5～8.0, reduces to 40 ℃ of dischargings and obtains urea-formaldehyde resin, and with nano-calcium carbonate and the blend of synthetic UF resin adhesive, its addition is respectively 3% of UF resin solid content, and mechanical stirring 30min fully disperses it.
Claims (3)
1. the preparation method of a nano modified urea resin, this method comprise with nanoparticle with carry out mixed and modifiedly with urea-formaldehyde resin, it is characterized in that described nanoparticle comprises nano titanium oxide, nano silicon, nano-calcium carbonate.
2. method according to claim 1, wherein the nano material of Jia Ruing can also can be two kinds or above mixture for a kind of.
3. method according to claim 1, the amount of the nano material of adding are 0～10 weight % of urea-formaldehyde resin solid content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100392115A CN101880437A (en) | 2009-05-05 | 2009-05-05 | Method for preparing nano modified urea resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100392115A CN101880437A (en) | 2009-05-05 | 2009-05-05 | Method for preparing nano modified urea resin |
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| Publication Number | Publication Date |
|---|---|
| CN101880437A true CN101880437A (en) | 2010-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100392115A Pending CN101880437A (en) | 2009-05-05 | 2009-05-05 | Method for preparing nano modified urea resin |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103232827A (en) * | 2013-05-27 | 2013-08-07 | 新凯骅实业发展有限公司 | System for preparing UFIM (Urea-Formaldehyde-Inorganic Mineral) adhesive |
| CN103254860A (en) * | 2013-05-27 | 2013-08-21 | 新凯骅实业发展有限公司 | UFIM adhesive and preparation method thereof and UFIM glued ecological plant fiber board and particle board |
| CN103540282A (en) * | 2013-09-16 | 2014-01-29 | 浙江农林大学 | Urea-formaldehyde resin wood adhesive modifier and applications thereof |
| CN104725775A (en) * | 2015-03-18 | 2015-06-24 | 桂林兴松林化有限责任公司 | Preparation method of nano silicon dioxide/rosin modified urea-formaldehyde resin |
| CN104762039A (en) * | 2015-04-30 | 2015-07-08 | 黄琳 | Adhesive for indoor plywood |
| CN107325486A (en) * | 2017-06-27 | 2017-11-07 | 苏州威尔德工贸有限公司 | A kind of nano-material modified multi-functional Lauxite composite and preparation method thereof |
| CN108047644A (en) * | 2017-12-29 | 2018-05-18 | 溧阳市乔森塑料有限公司 | Modified urea-formaldehyde moulding compound and preparation method thereof |
| CN110951212A (en) * | 2019-12-21 | 2020-04-03 | 北华大学 | Preparation method of nano silicon dioxide modified melamine formaldehyde resin |
-
2009
- 2009-05-05 CN CN2009100392115A patent/CN101880437A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103232827A (en) * | 2013-05-27 | 2013-08-07 | 新凯骅实业发展有限公司 | System for preparing UFIM (Urea-Formaldehyde-Inorganic Mineral) adhesive |
| CN103254860A (en) * | 2013-05-27 | 2013-08-21 | 新凯骅实业发展有限公司 | UFIM adhesive and preparation method thereof and UFIM glued ecological plant fiber board and particle board |
| CN103232827B (en) * | 2013-05-27 | 2014-04-09 | 新凯骅实业发展有限公司 | System for preparing UFIM (Urea-Formaldehyde-Inorganic Mineral) adhesive |
| CN103254860B (en) * | 2013-05-27 | 2014-06-11 | 新凯骅实业发展有限公司 | UFIM adhesive and preparation method thereof and UFIM glued ecological plant fiber board and particle board |
| CN103540282A (en) * | 2013-09-16 | 2014-01-29 | 浙江农林大学 | Urea-formaldehyde resin wood adhesive modifier and applications thereof |
| CN103540282B (en) * | 2013-09-16 | 2015-07-08 | 浙江农林大学 | Urea-formaldehyde resin wood adhesive modifier and applications thereof |
| CN104725775A (en) * | 2015-03-18 | 2015-06-24 | 桂林兴松林化有限责任公司 | Preparation method of nano silicon dioxide/rosin modified urea-formaldehyde resin |
| CN104762039A (en) * | 2015-04-30 | 2015-07-08 | 黄琳 | Adhesive for indoor plywood |
| CN107325486A (en) * | 2017-06-27 | 2017-11-07 | 苏州威尔德工贸有限公司 | A kind of nano-material modified multi-functional Lauxite composite and preparation method thereof |
| CN108047644A (en) * | 2017-12-29 | 2018-05-18 | 溧阳市乔森塑料有限公司 | Modified urea-formaldehyde moulding compound and preparation method thereof |
| CN108047644B (en) * | 2017-12-29 | 2020-08-14 | 溧阳市乔森塑料有限公司 | Modified urea-formaldehyde molding compound and preparation method thereof |
| CN110951212A (en) * | 2019-12-21 | 2020-04-03 | 北华大学 | Preparation method of nano silicon dioxide modified melamine formaldehyde resin |
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Application publication date: 20101110 |