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Urea-formaldehyde resin adhesive containing modified starch emulsion, preparation method and application

A technology of urea-formaldehyde resin and starch milk, which is used in starch-derived adhesives, adhesives, aldehyde/ketone condensation polymer adhesives, etc. The effect of curing time, improving drying rate and improving economic efficiency of enterprises

Inactive Publication Date: 2017-10-10
ZHEJIANG SHENGHUA YUNFENG GREENEO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its high curing temperature cannot be used in the production of recombined decorative materials cured at room temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Preparation of modified starch emulsion:

[0031] According to the invention patent "a preparation method of modified starch adhesive for wood" (ZL201010171082.8), the obtained modified starch emulsion has a solid content of ≥35%.

[0032] 2) Preparation of aqueous polymer solution:

[0033] 10 g of polyvinyl alcohol was added to 90 g of water, the temperature was raised to 90° C., and stirred for 30 minutes to prepare the water-based polymer.

[0034] 3) Preparation of raw material veneer:

[0035] The AYOUS logs are peeled and cut into veneers of certain specifications, and the veneers are bleached or dyed and dried. The moisture content of the veneers is controlled at 8-12%, and then the veneers are repaired and sorted according to the process requirements. .

[0036] 4) Modulation of adhesive:

[0037] Put 30kg of urea-formaldehyde resin, 20kg of modified starch emulsion, 20kg of polyvinyl acetate emulsion, 9kg of water-based polymer, 0.15kg of polyacrylamide...

Embodiment 2

[0042] The remaining production processes in Example 1 are not changed, only the following changes are made to the adhesive formulation:

[0043] Urea-formaldehyde resin 30kg, modified starch emulsion 20kg, polyvinyl acetate emulsion 15kg, water-based polymer 9kg, polyacrylamide 0.18kg, isocyanate prepolymer 7.5kg, organic acid solution 1.1kg, bentonite 1.5kg.

[0044]The reconstituted decorative veneer thus obtained meets the requirements of the GB / T 28999-2012 "Reconstituted decorative veneer" standard, and the formaldehyde emission is 1.0 mg / L.

Embodiment 3

[0046] The remaining production processes in Example 1 are not changed, only the following changes are made to the adhesive formulation:

[0047] Urea-formaldehyde resin 25kg, modified starch emulsion 20kg, polyvinyl acetate emulsion 20kg, water-based polymer 9kg, polyacrylamide 0.18kg, isocyanate prepolymer 7.5kg, organic acid solution 1.1kg, flour 1kg, bentonite 1kg.

[0048] The reconstituted decorative veneer thus obtained has been inspected to meet the standard requirements of GB / T 28999-2012 "Reconstituted Decorative Veneer", and the formaldehyde emission is 0.9 mg / L.

[0049] To sum up, the starch emulsion-modified urea-formaldehyde resin adhesive provided by the present invention adopts urea-formaldehyde resin to be mixed with modified starch emulsion and polyvinyl acetate emulsion, so that the total volatile organic compounds are less, the formaldehyde emission is effectively reduced, and the formaldehyde emission is relatively low. High environmental protection, and ...

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Abstract

The invention relates to a urea-formaldehyde resin adhesive containing modified starch emulsion. The urea-formaldehyde resin adhesive containing the modified starch emulsion is prepared from the following raw materials in parts by weight: 10 parts of urea-formaldehyde resin, 1-10 parts of the modified starch emulsion, 2-10 parts of polyvinyl acetate emulsion, 0.3-1 part of a curing agent, 0.9-3 parts of a reinforcing agent, 2-6 parts of a water-based polymer, 0.03-0.1 part of a modifying aid and 0.5-1.5 parts of filler. The adhesive has the advantages that the formaldehyde emission amount is effectively reduced, better environment-friendliness is realized, flexibility of an adhesive layer is improved, drying rate of the adhesive is increased, curing time of the adhesive is shortened, moisture regain rate of the adhesive is reduced, production cost is reduced, and economic benefit is improved.

Description

technical field [0001] The invention relates to an adhesive, in particular to a starch emulsion-modified urea-formaldehyde resin adhesive. Background technique [0002] Restructured decorative material, also known as "technical wood", is a kind of veneer that is made from the peeling (or slicing) veneer of plantation or common tree species wood, and is manufactured by veneer dyeing, lamination gluing, molding and other technologies. It is a new type of wood decoration material with natural precious wood characteristics (texture, pattern, color, etc.) or other artistic patterns. Depending on its use, it can be processed into reconstituted decorative sawn timber, reconstituted decorative shavings and reconstituted decorative veneer. In the manufacturing process of the reconstituted decorative material, the microstructure and inherent properties of the wood are not destroyed, and the natural properties of natural wood such as heat insulation, insulation, temperature regulation...

Claims

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Application Information

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IPC IPC(8): C09J161/24C09J103/04C09J131/04C09J129/04C09J11/04C09J11/08
CPCC08L2205/02C08L2205/035C09J11/04C09J11/08C09J161/24C08L3/04C08L31/04C08L29/04C08L33/26C08L3/02C08K3/346
Inventor 陆旭晨施晓宏庞小仁盛娜赵忠庆
Owner ZHEJIANG SHENGHUA YUNFENG GREENEO
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