CN104130731A - Compound modifier for urea-formaldehyde resin adhesives and urea-formaldehyde resin adhesive powder modified by same - Google Patents
Compound modifier for urea-formaldehyde resin adhesives and urea-formaldehyde resin adhesive powder modified by same Download PDFInfo
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- CN104130731A CN104130731A CN201410384815.4A CN201410384815A CN104130731A CN 104130731 A CN104130731 A CN 104130731A CN 201410384815 A CN201410384815 A CN 201410384815A CN 104130731 A CN104130731 A CN 104130731A
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- urea
- formaldehyde resin
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Abstract
The invention provides a compound modifier for urea-formaldehyde resin adhesives and urea-formaldehyde resin adhesive powder modified by the same, belonging to the field of urea-formaldehyde resin adhesives and aiming to solve the technical problems that existing urea-formaldehyde resin adhesives release formaldehyde for a long term in the using process, thus causing great impact on the living environments and affecting body health. The compound modifier is formed by melamine, urea and cassava starch; the modified urea-formaldehyde resin adhesive powder is formed by powdery urea-formaldehyde resin adhesives, the compound modifier for urea-formaldehyde resin adhesives and a curing agent. The content of free formaldehyde in the adhesives prepared by using the urea-formaldehyde resin adhesive powder is 0.5-0.75%, and the viscosity of a glue solution is about 248mPa.s. The three-ply poplar plywood with thickness of 3.0mm is bonded by adopting the urea-formaldehyde resin adhesives, and the plywood bonding strength is detected to be 2.05-2.84MPa.
Description
Technical field
The invention belongs to urea-formaldehyde resin adhesive field, be specifically related to a kind of urea-formaldehyde resin adhesive and with composite modifier and urea-formaldehyde resin adhesive, use the urea-formaldehyde resin adhesive of composite modifier modification.
Background technology
Urea-formaldehyde resin adhesive is a kind of exploitation thermosetting polymer tackiness agent early.Because its technique is simple, the advantage such as raw material is cheap, and bonding strength is high, water white transparency, is widely used in the industries such as the production of glued board, shaving board, medium density fibre board (MDF), artificial board and interior decoration.
Urea-formaldehyde resin adhesive is because of cheap, functional, so account for very large proportion in wood-based plate is used.But because of long-term release formaldehyde in use, living environment is caused very large, affect healthy.
Summary of the invention
The present invention will solve existing urea-formaldehyde resin adhesive and have the medium-term and long-term release formaldehyde of use procedure, living environment is caused very large, affects healthy technical problem; And provide urea-formaldehyde resin adhesive with composite modifier and with the urea-formaldehyde resin adhesive of its modification.
Urea-formaldehyde resin adhesive composite modifier of the present invention is comprised of trimeric cyanamide, urea and tapioca (flour); Preparation method stirs after each component is mixed and makes.
The weight ratio of described trimeric cyanamide, urea and tapioca (flour) is 2:2:3.
Composite modifier raw material sources of the present invention are wide, cheap.
In the present invention, urea-formaldehyde resin adhesive is comprised of following component with the urea-formaldehyde resin adhesive powder of composite modifier modification: powdery urea resin glue, composite modifier and solidifying agent for urea-formaldehyde resin adhesive; Preparation method stirs after each component is mixed and makes.By the using method of the urea-formaldehyde resin adhesive powder of above-mentioned modification: first powdery urea resin glue, composite modifier, solidifying agent are pre-mixed evenly under dry state, then add water to mix high-speed stirring and can use after evenly.
In the present invention, each composition weight (part) proportioning is: powdery urea resin glue 100, composite modifier 15～30, solidifying agent 2～5 for urea-formaldehyde resin adhesive.
In the present invention urea-formaldehyde resin adhesive with the urea-formaldehyde resin adhesive powder of composite modifier modification in adding urea-formaldehyde resin adhesive to, with urea-formaldehyde resin adhesive interaction, can be in the situation that not affecting tackiness agent use, reducing formaldehyde discharges, add composite modifier time substitute the usage quantity of 15% urea-formaldehyde resin adhesive, reduce costs, improve wood-based plate competitive power on market.
In the present invention, urea-formaldehyde resin adhesive, with the urea-formaldehyde resin adhesive powder of composite modifier modification for urea-formaldehyde resin for artificial board tackiness agent, does not need to carry out the change of production technique, production unit.In the present invention, urea-formaldehyde resin adhesive is extensive with the raw material sources of the urea-formaldehyde resin adhesive powder of composite modifier modification, and stable performance, in the situation that not adding water, can preserve for a long time.Can be for long-distance transport.At room temperature sealing is placed does not have the moisture absorption caking phenomenon that wets for 180 days, there is no obvious denaturalization phenomenon yet.Tapioca (flour) wide material sources, cheap, and be that renewable resources can not cause environmental pollution, the cost of composite modifier and urea-formaldehyde resin adhesive reduced.
The content of the sizing agent Free-formaldehyde of preparing with modified urea-formaldehyde resin adhesive powder of the present invention is 0.5%～0.75%, the viscosity 248mPas left and right of glue.The hydroxyl generation chemical reaction of glycosidic link in properties-correcting agent of the present invention easily and in water, thus the large sizing agent of viscosity formed, and good bonding strength.Adopt the poplar three-layer glued board that urea-formaldehyde resin adhesive bond thickness is 3.0mm, glued board gummed intensity is detected, bonding strength is 2.05～2.84 (MPa).
Embodiment
Embodiment one: in present embodiment, composite modifier is comprised of by the weight ratio of 2:2:3 trimeric cyanamide, urea and tapioca (flour).
After said components is weighed in proportion, mix, obtain composite modifier.Working method is simple.Each component wide material sources, cheap, production cost is low.
In present embodiment, the index of each composition is as follows
Table 1: trimeric cyanamide acceptable end product index:
| Index name | First grade |
| Content of melamine/% | ≥99.0 |
| Water content/% | ≤0.20 |
| The ash content of coal/% | ≤0.05 |
| Water-soluble | ＜20℃ |
| PH value | 7.5—9.5 |
Table 2: urea acceptable end product index:
Table 3: tapioca (flour) index
| Starch content/% | 86.69 |
| Moisture (20 ℃, 65% atmospheric moisture)/% | 13 |
| Lipid material, % butt≤ | 0.1 |
| Protein, % butt≤ | 0.1 |
Embodiment two: in present embodiment this urea-formaldehyde resin adhesive powder by weight mark than being composite modifier, 100 parts of powdery urea resin glue, 2 parts of ammonium chlorides for urea-formaldehyde resin adhesive by 15 parts of embodiments one.Urea-formaldehyde resin adhesive preparation method: be that above-mentioned materials is mixed.
In the modified urea-formaldehyde resin adhesive powder described in present embodiment, add 120 parts of water to stir, obtain urea-formaldehyde resin adhesive, can use.
Urea-formaldehyde resin adhesive Free-formaldehyde content: 0.5%, gelatin viscosity: 248mPas.
Adopt the poplar that urea-formaldehyde resin adhesive bond thickness is 3.0mm to form three layers of glued board, glued board gummed intensity is detected to bonding strength 2.05Mpa.
Embodiment three: in present embodiment this urea-formaldehyde resin adhesive powder by weight mark than being composite modifier, 100 parts of powdery urea resin glue, 3 parts of ammonium chlorides for urea-formaldehyde resin adhesive by 12 parts of embodiments one.Urea-formaldehyde resin adhesive preparation method: be that above-mentioned materials is mixed.
In the modified urea-formaldehyde resin adhesive powder described in present embodiment, add 120 parts of water to stir, obtain urea-formaldehyde resin adhesive, can use.
Urea-formaldehyde resin adhesive Free-formaldehyde content is 0.60%, and gelatin viscosity is 250mPas.
Adopt the poplar that urea-formaldehyde resin adhesive bond thickness is 3.0mm to form three layers of glued board, glued board gummed intensity is detected, bonding strength is 2.75Mpa.
Embodiment four: in present embodiment this urea-formaldehyde resin adhesive powder by weight mark than being composite modifier, 100 parts of powdery urea resin glue, 5 parts of ammonium chlorides for urea-formaldehyde resin adhesive by 10 parts of embodiments one.Urea-formaldehyde resin adhesive preparation method: be that above-mentioned materials is mixed.
In the modified urea-formaldehyde resin adhesive powder described in present embodiment, add 120 parts of water to stir, obtain urea-formaldehyde resin adhesive, can use.
Urea-formaldehyde resin adhesive Free-formaldehyde content is 0.75%, and gelatin viscosity is 246mPas.
Adopt the poplar that urea-formaldehyde resin adhesive bond thickness is 3.0mm to form three layers of glued board, glued board gummed intensity is detected, bonding strength is 2.84Mpa.
Claims (7)
1. urea-formaldehyde resin adhesive composite modifier, is characterized in that urea-formaldehyde resin adhesive composite modifier is comprised of trimeric cyanamide, urea and tapioca (flour).
2. urea-formaldehyde resin adhesive composite modifier according to claim 1, the weight ratio that it is characterized in that described trimeric cyanamide, urea and tapioca (flour) is 2:2:3.
3. the urea-formaldehyde resin adhesive powder with composite modifier modification according to urea-formaldehyde resin adhesive described in claim 1 or 2, is characterized in that described urea-formaldehyde resin adhesive powder is comprised of following component: powdery urea resin glue, composite modifier and solidifying agent for urea-formaldehyde resin adhesive.
4. the urea-formaldehyde resin adhesive powder of composite modifier modification for urea-formaldehyde resin adhesive according to claim 3, is characterized in that described solidifying agent is ammonium chloride.
5. the urea-formaldehyde resin adhesive powder of composite modifier modification for urea-formaldehyde resin adhesive according to claim 4, is characterized in that the weight proportion of each component is: powdery urea resin glue 100, composite modifier 10～15, solidifying agent 2～5 for urea-formaldehyde resin adhesive.
6. the urea-formaldehyde resin adhesive powder of composite modifier modification for urea-formaldehyde resin adhesive according to claim 4, is characterized in that the weight proportion of each component is: powdery urea resin glue 100,2 parts, composite modifier 15, solidifying agent for urea-formaldehyde resin adhesive.
7. the urea-formaldehyde resin adhesive powder of composite modifier modification for urea-formaldehyde resin adhesive according to claim 4, is characterized in that the weight proportion of each component is: powdery urea resin glue 100,5 parts, composite modifier 10, solidifying agent for urea-formaldehyde resin adhesive.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410384815.4A CN104130731A (en) | 2014-08-07 | 2014-08-07 | Compound modifier for urea-formaldehyde resin adhesives and urea-formaldehyde resin adhesive powder modified by same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410384815.4A CN104130731A (en) | 2014-08-07 | 2014-08-07 | Compound modifier for urea-formaldehyde resin adhesives and urea-formaldehyde resin adhesive powder modified by same |
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| CN104130731A true CN104130731A (en) | 2014-11-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107686704A (en) * | 2017-09-25 | 2018-02-13 | 常州市日臣艺术装饰材料有限公司 | A kind of composite artificial board adhesive |
| CN112608699A (en) * | 2020-12-16 | 2021-04-06 | 广西武宣利佰林木业有限公司 | Environment-friendly adhesive for plywood and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102408855A (en) * | 2011-07-18 | 2012-04-11 | 广西大学 | Urea formaldehyde resin adhesive for moisture-proof environment-friendly medium density fiberboard and production method as well as composite additives thereof |
| CN103509166A (en) * | 2013-09-23 | 2014-01-15 | 山东凯源木业有限公司 | Melamine-modified urea-formaldehyde resin and preparation method thereof |
-
2014
- 2014-08-07 CN CN201410384815.4A patent/CN104130731A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102408855A (en) * | 2011-07-18 | 2012-04-11 | 广西大学 | Urea formaldehyde resin adhesive for moisture-proof environment-friendly medium density fiberboard and production method as well as composite additives thereof |
| CN103509166A (en) * | 2013-09-23 | 2014-01-15 | 山东凯源木业有限公司 | Melamine-modified urea-formaldehyde resin and preparation method thereof |
Non-Patent Citations (1)
| Title |
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| 李晓平: "《木材胶粘剂实用技术》", 31 January 2003, article "脲醛树脂胶粘剂" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107686704A (en) * | 2017-09-25 | 2018-02-13 | 常州市日臣艺术装饰材料有限公司 | A kind of composite artificial board adhesive |
| CN112608699A (en) * | 2020-12-16 | 2021-04-06 | 广西武宣利佰林木业有限公司 | Environment-friendly adhesive for plywood and preparation method thereof |
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Application publication date: 20141105 |