Method for preparing starch-based water-resistant adhesive for corrugated board production

A technology of corrugated cardboard and adhesives, applied in the direction of adhesives, adhesive types, grafted polymer adhesives, etc., can solve problems such as poor component compatibility, achieve improved water resistance, good quick-drying characteristics, and reduce damage Effect

Inactive Publication Date: 2012-07-04
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The adhesive described in this invention ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: the synthesis of starch-isopropenyl acetate / butyl acrylate cross-linked graft copolymer, take cornstarch as raw material, after being mixed with the starch emulsion that mass percent concentration is 30%, with starch quality 2% Ammonium sulfate is the initiator, with acetic acid as the catalyst, under the condition of adjusting pH=3, slowly add the graft monomer of starch quality 70%, wherein isopropenyl acetate accounts for 60% of the graft monomer gross weight, carry out Graft copolymerization reaction, the graft copolymerization reaction temperature is 60 ° C, the graft copolymerization reaction time is 6 hours, after the graft copolymerization reaction for 2 hours, add 0.2% of the starch mass and 1% of the N, N' -Methylenebisacrylamide is used as a crosslinking agent to carry out a crosslinking reaction, and both feeding and reaction are carried out under stirring, and the reaction product is a starch-isopropenyl acetate / butyl acrylate crosslinking graf...

Embodiment 2

[0020] Embodiment 2: the synthesis of starch-isopropenyl acetate / butyl acrylate cross-linked graft copolymer, take potato starch as raw material, after being mixed with the starch emulsion that mass percentage concentration is 40%, with starch quality 3% Ammonium sulfate is an initiator, with acetic acid as a catalyst, under the condition of adjusting pH=4, slowly add the graft monomer of starch quality 85%, wherein isopropenyl acetate accounts for 70% of the graft monomer gross weight, carry out Graft copolymerization reaction, the graft copolymerization reaction temperature is 70 ° C, the graft copolymerization reaction time is 5 hours, after the graft copolymerization reaction for 2 hours, add N, N' with 0.4% starch mass and 1% mass concentration -Methylenebisacrylamide is used as a crosslinking agent to carry out a crosslinking reaction, and both feeding and reaction are carried out under stirring, and the reaction product is a starch-isopropenyl acetate / butyl acrylate cros...

Embodiment 3

[0023] Embodiment 3: the synthesis of starch-isopropenyl acetate / butyl acrylate cross-linked graft copolymer, take cassava starch as raw material, after being mixed with the starch emulsion that mass percentage concentration is 5%, with the persulfuric acid of starch quality 4 Ammonium is the initiator, with acetic acid as the catalyst, under the condition of adjusting pH=5, slowly add the grafting monomer of starch quality 95%, wherein isopropenyl acetate accounts for 80% of the total weight of the grafting monomer, and carry out the grafting Copolymerization reaction, graft copolymerization reaction temperature is 80 ℃, graft copolymerization reaction time is 4 hours, after graft copolymerization reaction 2 hours, add starch mass 0.5%, mass concentration is 2% N, N '- Methylbisacrylamide is used as a cross-linking agent to carry out cross-linking reaction, both feeding and reaction are carried out under stirring, and the reaction product is starch-isopropenyl acetate / butyl ac...

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Abstract

The invention relates to a method for preparing a starch-based water-resistant adhesive for corrugated board production, and belongs to the technical field of paper coating adhesives. The method comprises the following steps of: performing grafting copolymerization modification on starch serving as a main raw material by using two monomers, namely isopropenyl acetate and butyl acrylate, and performing crosslinking modification; and heating for pasting, and adding aids to obtain a good-performance starch-based water-resistant adhesive for corrugated board production. The prepared adhesive improves the defect of low water resistance of a starch adhesive, has the advantages of wide material sources, no pollution, high adhesive strength and high water resistance, and can be widely applied to the corrugated board production.

Description

technical field [0001] The invention relates to a preparation method of a starch-based water-resistant adhesive for corrugated cardboard production, and belongs to the technical field of paper coating adhesives. Background technique [0002] In the prior art, the surfaces of different products can be joined by adhesives. On an industrial scale, typical surfaces joined together by adhesives include paper surfaces and cardboard surfaces. In this regard, starch-based adhesive mixtures are widely used due to their simplicity of preparation, their technical features and their economically acceptable manufacturing costs. However, in actual use, there are disadvantages of poor water resistance, and the produced corrugated cardboard tends to become damp and soft, resulting in a decrease in the bond strength and edge pressure strength of the cardboard. [0003] Chinese invention patent CN1438284 discloses a water-resistant starch adhesive for single-facer and corrugated cardboard pr...

Claims

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Application Information

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IPC IPC(8): C09J151/02C08F251/00C08J3/24B31F5/04
Inventor 张治国许贤根
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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