Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of high-performance environment-friendly melamine resin glue and preparation method thereof

A melamine, high-performance technology, used in adhesives, aldehyde/ketone condensation polymer adhesives, adhesive types, etc., can solve the problems of high adhesive cost, unsatisfactory adhesive strength, gelation, etc. Low cost, good chemical resistance and electrical insulation, high bond strength

Active Publication Date: 2019-05-14
广西高峰桂山人造板有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Chinese patent CN201010244439.0 discloses an adhesive that uses cyanoethylated fiber as an adhesive for the manufacture of wood-based panels. The raw materials of this adhesive do not contain formaldehyde, and its formaldehyde release is almost zero. However, the cost of the adhesive is high and the adhesive strength is not ideal
[0007] At the same time, it was proposed to reduce the residual amount of monomeric formaldehyde in the adhesive to reduce the release of formaldehyde, but it is easy to produce gel phenomenon during the reaction process.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of environmental protection type melamine resin glue, its preparation process is as follows:

[0022] a. Put 42.0 parts of formaldehyde, 20.0 parts of urea, 8.0 parts of melamine, 0.3 parts of acrylamide, and 1.04 parts of polyvinyl alcohol into the reaction kettle in sequence according to the weight percentage of the formula. After fully stirring, the mixed solution is mixed with 0.01 parts of sodium hydroxide solution Adjust the pH value to 7.5, raise the temperature to 65-75°C, and keep it warm for 30 minutes;

[0023] b. Use 0.1 part of ammonium chloride aqueous solution to adjust the pH value of the reaction mixture, and lower the temperature appropriately. Add an acidic catalyst every 10 minutes and check the pH value. When the pH value of the mixture is adjusted to about 4.5, continue the reaction for 10 minutes; then use Adjust the pH value of the reaction mixture to about 7.5 with 0.04 parts of sodium hydroxide, and raise the temperature to about 75°C at...

Embodiment 2

[0025] A kind of environmental protection type melamine resin glue, its preparation process is as follows:

[0026] a. Put 40.0 parts of formaldehyde, 19.0 parts of urea, 7.5 parts of melamine, 0.5 parts of acrylamide, and 1.54 parts of polyvinyl alcohol into the reaction kettle in sequence according to the weight percentage of the formula. After fully stirring, mix the mixed solution with 0.01 parts of sodium hydroxide solution Adjust the pH value to 7.5, raise the temperature to 65-75°C, and keep it warm for 30 minutes;

[0027] b. Use 0.1 part of ammonium chloride aqueous solution to adjust the pH value of the reaction mixture, and lower the temperature appropriately. Add an acidic catalyst every 10 minutes and check the pH value. When the pH value of the mixture is adjusted to about 4.5, continue the reaction for 10 minutes; then use Adjust the pH value of the reaction mixture to about 7.5 with 0.04 parts of sodium hydroxide, and raise the temperature to about 75°C at the ...

Embodiment 3

[0029] A kind of environmental protection type melamine resin glue, its preparation process is as follows:

[0030] a. Put 45.0 parts of formaldehyde, 22.0 parts of urea, 6.5 parts of melamine, 0.2 parts of acrylamide, and 0.94 parts of polyvinyl alcohol into the reaction kettle in sequence according to the weight percentage of the formula. Adjust the pH value to 7.5, raise the temperature to 65-75°C, and keep it warm for 30 minutes;

[0031] b. Use 0.1 part of ammonium chloride aqueous solution to adjust the pH value of the reaction mixture, and lower the temperature appropriately. Add an acidic catalyst every 10 minutes and check the pH value. When the pH value of the mixture is adjusted to about 4.5, continue the reaction for 10 minutes; then use Adjust the pH value of the reaction mixture to about 7.5 with 0.04 parts of sodium hydroxide, and raise the temperature to about 75°C at the same time, add 8.0 parts of melamine and 5.0 parts of urea to continue the reaction for 15...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a high-performance environment-friendly melamine resin adhesive and a preparation method thereof. The high-performance environment-friendly melamine resin adhesive is mainly prepared from formaldehyde, urea, melamine, a basic catalyst, an acidic catalyst, polyvinyl alcohol, acrylamide and ammonia water. A weak base-weak acid-weak base production technology is adopted in the preparation method of the adhesive. The high-performance environment-friendly melamine resin adhesive prepared through the method has the advantages of being high in hardness and bonding strength, extremely low in formaldehyde emission, good in wear resistance, excellent in water resistance, good in aging resistance, chemical resistance and electrical insulating property, capable of being cured by heating without adding a curing agent, low in cost and the like.

Description

technical field [0001] The invention relates to a preparation method of melamine resin glue with high performance, low cost and extremely low formaldehyde release, belonging to the field of polymer synthetic materials. Background technique [0002] Wood-based panels are boards made of wood or other non-wood plants as the main raw material and processed by adding adhesives. At present, the most commonly used adhesive for wood-based panels is urea-formaldehyde resin or modified urea-formaldehyde resin. The production process of urea-formaldehyde resin is simple and convenient, and the cost is low, but its water resistance and adhesive strength are low, so only the modified urea-formaldehyde resin can better meet the market demand. After it is modified by melamine, polyvinyl alcohol, etc., its water resistance and bonding strength are obviously improved. [0003] The existing melamine resin impregnated products are mainly impregnated decorative paper, which is cured by hot pr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09J161/32C08G12/40
CPCC08G12/40C09J161/32
Inventor 张武许钧强康伦国姚东生
Owner 广西高峰桂山人造板有限公司