Preparation process and application of water resistant starch-base timber adhesive

A wood adhesive, starch-based technology, applied in the direction of adhesives, adhesive application devices, adhesive types, etc., can solve the problems of poor water resistance and achieve the effect of improving water resistance, maintaining molecular configuration, and stable three-dimensional structure

Inactive Publication Date: 2007-07-18
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Starch-based wood adhesives applied to wood products have reached the national standard in terms of dry and wet strength, but there are disadvantages of poor water resistance in actual use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Synthesis of starch-vinyl acetate cross-linked graft copolymer, using starch as raw material, after preparing starch emulsion with a concentration of 30-40% by mass, using hydrochloric acid as a catalyst and ammonium persulfate as an initiator, at pH 3-40 Within the range of 5, slowly add vinyl acetate monomer accounting for 75% to 85% of the mass ratio of starch to carry out graft copolymerization reaction, the grafting reaction temperature is 60-70°C, and the grafting reaction time is 2-4 hours; After 1-2 hours of grafting reaction, N,N'-methylenebisacrylamide cross-linking agent is added with a mass ratio of 0.2%-0.4% of starch and a mass concentration of 1%-2%. Both feeding and reaction are carried out under stirring, and the reaction product is starch-vinyl acetate cross-linked graft copolymer.

[0016] The mixing of starch-vinyl acetate cross-linked graft copolymer and auxiliary agent, using the synthesized starch-vinyl acetate cross-linked graft copolymer as the ...

Embodiment 2

[0018] Commercially available white latex, starch glue and the compressive shear strength of water-resistant wood glue of the present invention and water resistance compare, can find from table 1, the compressive shear strength of water-resistant wood glue of the present invention and water resistance are all higher than commercially available. Sale of white latex and starch glue.

[0019] Table 1 Comparison of compressive shear strength and water resistance of three kinds of adhesives

[0020] Compressive shear strength

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PUM

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Abstract

The present invention belongs to the field of adhesive technology, and provides one kind of starch-base timber adhesive with excellent water resistance and its preparation process and application. The starch-base timber adhesive with excellent water resistance has wide material source, no environmental pollution and high adhesion strength, and may be used widely in timber adhesion.

Description

technical field [0001] The invention discloses a preparation method and application of a water-resistant starch-based wood adhesive. The adhesive is obtained by grafting starch and vinyl acetate, cross-linking, and mixing with auxiliary agents, belonging to the technical field of adhesives. Background technique [0002] Starch-based wood adhesive is a polymer compound with starch as the main raw material. It has the advantages of wide source of raw materials, high bonding strength, low cost and no pollution. Starch-based wood adhesives applied to wood products have reached the national standard in terms of dry and wet strength, but have the disadvantage of poor water resistance in actual use. Therefore, it is necessary to find a modification method to improve the water resistance of the product. Contents of the invention [0003] The object of the present invention is to provide a preparation method and application of a water-resistant starch-based wood adhesive. Firstly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J151/02B27G11/00
Inventor 顾正彪洪雁李兆丰王嫣
Owner JIANGNAN UNIV
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