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Formaldehyde-free board adhesive and preparing method

An adhesive and sheet technology, applied in the directions of adhesives, adhesive types, cellulose adhesives, etc., can solve problems such as formaldehyde pollution and harm to health, increase water retention, improve flow performance, and simple preparation equipment workable effect

Inactive Publication Date: 2017-12-15
东莞市冠力胶业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high content of free formaldehyde in urea-formaldehyde resin directly leads to formaldehyde pollution in the use environment (production site) of the resin and the use environment (room) of glued finished products, which seriously endangers people's health.

Method used

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  • Formaldehyde-free board adhesive and preparing method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment provides a formaldehyde-free sheet adhesive, comprising the following components by mass: 30 parts of deionized water, 15 parts of ethyl acrylate, 5 parts of starch ether, 3 parts of methyl cellulose ether, and 1 part of polyvinyl alcohol , 1 part of MDI-50 curing agent, 0.5 part of water-based polyurethane associative thickener, 0.1 part of polyether modified silicone defoamer, and 0.1 part of trishydroxymethylaminomethane.

[0026] The preparation method of the formaldehyde-free sheet adhesive of the present embodiment comprises the following steps:

[0027] Step 1: Add ethyl acrylate, starch ether, and methyl cellulose ether into the reaction kettle in sequence, raise the temperature to 55°C, and stir evenly;

[0028] Step 2: Add polyvinyl alcohol, water-based polyurethane associative thickener and polyether modified silicone defoamer to the obtained product in Step 1, continue to heat up to 72°C, and keep warm for 2.5 hours;

[0029] Step 3: Add dei...

Embodiment 2

[0033] This embodiment provides a formaldehyde-free sheet adhesive, comprising the following components by mass: 50 parts of deionized water, 30 parts of ethyl acrylate, 15 parts of starch ether, 10 parts of methyl cellulose ether, and 5 parts of polyvinyl alcohol , 10 parts of HMDI curing agent, 2 parts of water-based polyurethane associative thickener, 1 part of mineral oil mixture defoamer, 0.5 parts of potassium methyl silicate.

[0034] The preparation method of the formaldehyde-free sheet adhesive of the present embodiment comprises the following steps:

[0035] Step 1: Add ethyl acrylate, starch ether, and methyl cellulose ether into the reaction kettle in sequence, raise the temperature to 60°C, and stir evenly;

[0036] Step 2: Add polyvinyl alcohol, water-based polyurethane associative thickener and mineral oil mixture defoamer to the obtained product in Step 1, continue to heat up to 78°C, and keep warm for 2.5 hours;

[0037] Step 3: Add deionized water to the obt...

Embodiment 3

[0041] This embodiment provides a formaldehyde-free sheet adhesive, comprising the following components by mass: 40 parts of deionized water, 20 parts of ethyl acrylate, 10 parts of starch ether, 6 parts of methyl cellulose ether, and 3 parts of polyvinyl alcohol , a total of 5 parts of IPDI curing agent and HDI curing agent, 1 part of aqueous alkali-swellable acrylic thickener, 0.5 part of modified polysiloxane emulsion defoamer, and 0.3 part of ammonia water.

[0042] The preparation method of the formaldehyde-free sheet adhesive of the present embodiment comprises the following steps:

[0043] Step 1: Add ethyl acrylate, starch ether, and methyl cellulose ether into the reaction kettle in sequence, raise the temperature to 58°C, and stir evenly;

[0044] Step 2: Add polyvinyl alcohol, water-based alkali-swellable acrylic thickener and modified polysiloxane emulsion defoamer to the obtained product in Step 1, continue to heat up to 75°C, and keep warm for 2.5 hours;

[0045...

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Abstract

The invention belongs to the technical field of adhesives, and particularly relates to a formaldehyde-free board adhesive. The adhesive is prepared from, by weight, 30-50 parts of deionized water, 15-30 parts of ethyl acrylate, 5-15 parts of starch ether, 3-10 parts of methyl cellulose ether, 1-5 parts of polyving akohol, 1- 10 parts of curing agent, 0.5-2 parts of thickener, 0.1-1 part of antifoaming agent, and 0.1-0.5 part of pH regulator. Compared with the existing technology, the prepared environment-friendly adhesive has the advantages of reasonable compatibility of raw materials, no pollution to environment, no formaldehyde and other harmful substances, and good adhesion and stability performances. In addition, the invention further provides a preparing method for the formaldehyde-free board adhesive, the preparation process and preparation equipment are simple and feasible, so that the adhesive is suitable for large-scale industrial production and has a good prospect.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to an formaldehyde-free board adhesive and a preparation method thereof. Background technique [0002] Sheet adhesive refers to a substance that exerts its cohesive and bonding functions, and combines the sheet with the sheet or other materials through adhesion. The sheet metal processing industry is the industry with the largest amount of adhesives used. The amount of sheet metal adhesive used can be used to measure the development of a country or region's sheet metal processing industry. Products using board adhesives mainly include wood-based panels, floors, laminated materials and furniture. [0003] At present, more than 85% of the adhesive used for sheet metal processing in my country is urea-formaldehyde resin adhesive. Urea-formaldehyde resin is the cheapest variety among synthetic resins, the main components are urea and formaldehyde, the raw materials are e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J103/08C09J129/04C09J101/28
CPCC09J133/08C08L2205/035C08L3/08C08L1/28C08L29/04
Inventor 赵建国
Owner 东莞市冠力胶业有限公司
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