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Preparation method and application of water-based polymer adhesive

A technology of water-based polymers and adhesives, applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems of industrialization’s impact on food safety and difficulty in achieving bonding strength, and achieve Significant economic and social benefits of industrialization, increased product added value, and the effect of solving environmental pollution

Inactive Publication Date: 2011-01-19
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention patent with the application number CN200910031280.1 discloses a preparation method of water-based polyurethane adhesive for wood processing; its preparation is divided into three stages, the first stage consists of oligomer polyol, hydrophilic monomer, isocyanate 1. The modified monomer is polymerized step by step and free radical to form a modified polyurethane prepolymer; the second stage is to disperse the modified polyurethane prepolymer in water after neutralization and salt formation; the third stage is to form a modified polyurethane prepolymer after adding a chain extender. Water-based polyurethane emulsion; because the highly reactive isocyanate group (-N=C=O) in the adhesive has undergone a gradual polymerization reaction, it is difficult to achieve excellent bonding strength when applied to wood bonding
The invention patent with the application number CN200810051264.4 discloses another method for preparing wood adhesives. The adhesive uses starch and polyvinyl alcohol as the main raw materials. The main agent of the adhesive is prepared by grafting polyvinyl alcohol, and then modified by adding water-based SBS emulsion or melamine-formaldehyde resin. Since the adhesive uses starch as one of the main raw materials, its industrialization possible impact on food security

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Crumble the recovered PET, dry it with airflow, reduce the moisture to less than 0.5% by mass, and sieve out solids such as sand, stones, metals, etc.; add 100kg of recycled and broken PET, 5kg of ethanolamine, and monobutyl esterification catalyst to the reaction kettle Tin oxide 0.5kg, heat stabilizer trimethyl phosphate 0.6kg, and turn on the agitator, heat to 265-270°C, react for 30min; Add 165 kg of ammonia aqueous solution to the mixture, adjust the pH to 8.0, and disperse the resin to obtain PET water-based polymer emulsion.

[0030] When used, the prepared PET water-based polymer emulsion and diphenylmethane-4,4'-diisocyanate are mixed at room temperature in a mass ratio of 100:5 to obtain a water-based polymer wood adhesive.

Embodiment 2

[0032] Crumble the recovered PET, air-dry it, reduce the moisture content to less than 0.5% by mass, sieve out sand, stones, metals and other solids; add 100 kg of recovered and broken PET, 7 kg of ethanolamine, and two esterification catalysts to the reactor. 0.8kg of butyltin oxide, 1.0kg of heat stabilizer 2,6-di-tert-butyl-4-methylphenol, and turn on the stirrer, heat to 265-270°C, react for 30min; add 10kg of phthalic anhydride into the reaction kettle, React at 160-180°C for 30 minutes; add 170 kg of ammonia aqueous solution to the reaction kettle, adjust the pH to 8.0, and disperse the resin to obtain a PET water-based polymer emulsion.

[0033] When used, the prepared PET water-based polymer emulsion and diphenylmethane-4,4'-diisocyanate are mixed at room temperature in a mass ratio of 100:8 to obtain a water-based polymer wood adhesive.

Embodiment 3

[0035]Crumble the recycled PET, air-dry it, reduce the moisture content to less than 0.5% by mass, sieve out solids such as sand, stones, metals, etc.; add 100kg of recycled and broken PET, 6kg of ethanolamine, and titanium esterification catalyst to the reaction kettle 0.6 kg of tetrabutyl phosphate, 0.7 kg of heat stabilizer triphenyl phosphite, and turn on the agitator, heat to 265-270 ° C, and react for 30 min; add 8 kg of phthalic anhydride to the reaction kettle, and react at 160-180 ° C for 30 min; Add 168 kg of ammonia aqueous solution to the reaction kettle, adjust the pH to 8.0, and disperse the resin to obtain PET water-based polymer emulsion.

[0036] When used, the prepared PET water-based polymer emulsion and diphenylmethane-4,4'-diisocyanate are mixed at room temperature in a mass ratio of 100:6 to obtain a water-based polymer wood adhesive.

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Abstract

The invention relates to a preparation method and application of a water-based polymer adhesive, and belongs to the technical field of chemical adhesives. PET aqueous polymer emulsion is prepared from recycled polyethylene terephthalate (PET), ethanolamine, an esterification catalyst, a heat stabilizer, phthalic anhydride and aqueous solution of sodium hydroxide; and when used, the PET aqueous polymer emulsion which is packaged independently is mixed with diphenylmethane-4,4'-diisocyanate at room temperature to obtain the water-based polymer adhesive. The water-based polymer adhesive is used for adhering wood plywood.

Description

technical field [0001] The invention relates to a preparation method and application of a water-based polymer adhesive, in particular to a preparation method and application of a water-based polymer wood adhesive, and belongs to the technical field of chemical adhesives. Background technique [0002] my country's forest resources are scarce and wood is scarce. It is of great significance to prepare wood-based panels to replace wood with small-diameter wood segments, branch wood, and wood processing residues. The production of wood-based panels in our country is very large, and wood adhesives play a pivotal role in the production of wood-based panels. According to reports, the amount of adhesives used in my country's wood industry accounts for more than 60% of the total adhesive production. At present, the adhesives used in the wood industry are mainly "three-formaldehyde resins", namely urea-formaldehyde resins, phenolic resins and melamine-formaldehyde resins. Among them, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J167/02C09J11/06B27D1/04
Inventor 王志玲郑鲁沂刘思全刘志莲崔玉
Owner UNIV OF JINAN
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