Expansible rehumidified adhesive and its preparing method

A kind of adhesive, wet technology, applied in the direction of adhesive type, ester copolymer adhesive, amide/imide polymer adhesive, etc., to achieve the effect of repairing damage, convenient use and construction, and good stability

Inactive Publication Date: 2007-05-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Utilizing the high water absorption performance of polyacrylamide, the preparation of cross-linked remoistening adhesive by inverse emulsion polymerization technology has not been reported in China.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The first step, in the reactor, add 40 parts (mass parts, the same below) liquid paraffin, 1 part of sorbitan monolaurate, stir;

[0021] In the second step, 15 parts of acrylamide, 15 parts of aminoethyl methacrylate and 2 parts of ethylenediaminetetraacetic acid, 25 parts of water, 2 parts of potassium persulfate and sodium bisulfite are added to the oil phase of the first step , and use hydrochloric acid to control the pH value to 6.0, stir evenly, wait until the emulsion is stable, and heat up to 35°C;

[0022] In the third step, after reacting for 6 hours, the material is cooled and discharged to obtain a cationic cross-linked emulsion.

Embodiment 2

[0024] In the first step, in the reactor, add 40 parts of cyclohexane, 1 part of sodium dodecylbenzenesulfonate and nonylphenol polyoxyethylene ether compound, and stir evenly;

[0025] In the second step, 13 parts of acrylamide, 20 parts of methacrylic acid and 2 parts of sodium edetate, 25 parts of water, 4 parts of hydrogen peroxide and sodium bisulfite were added to the oil phase of the first step, and used Sodium hydroxide controls the pH value to 7.0, stirs evenly, waits for the emulsion to be stable, and raises the temperature to 35°C;

[0026] In the third step, after reacting for 4 hours, the material is cooled and discharged to obtain an anionic cross-linked emulsion.

Embodiment 3

[0028] The first step, in the reactor, add 10 parts of white kerosene oil phase dispersion medium, 2 parts of sorbitan monolaurate and sorbitan oleate, stir evenly;

[0029] In the second step, 10 parts of methacrylamide, 10 parts of dimethylaminoethyl methacrylate and 2.5 parts of N-methacrylamide, 4 parts of hydrogen peroxide and 61.5 parts of water are added to the oil phase of the first step , and use hydrochloric acid to control the pH value to 7.0, stir evenly, wait until the emulsion is stable, and heat up to 70°C;

[0030] In the third step, after reacting for 4 hours, the material is cooled and discharged to obtain a cationic cross-linked emulsion.

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PUM

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Abstract

The invention disclosed a kind of inflatable re-wet mastic the ingredient of which is cross-link copolymer (the solid content of the copolymer is 20-50%). The copolymer refers to the cross-link copolymer of non-ion metamer and positive ion metamer, the cross-link copolymer of non-ion metamer and negative ion metamer or the mixture of the two copolymers, the aqueous mediator and the oily mediator. The mastic in the invention has good gluing ability at low temperature; it also has strong initial cohesity, quick moistening back-glue speed; it takes less than 35 seconds to reach strong gluing ability; it has very good stability and expandibility, the volume can be expanded by 25 times so it can compensate the damage because of the coarse surface; it can be used in various aspects such as wall paper, ads, labels, stamps, envelop sealing and so on.

Description

technical field [0001] The invention relates to a convenient adhesive that can be rewetted with water after drying, and specifically relates to an expandable and rewettable adhesive and a preparation method thereof. The adhesive can be used for wallpapers, advertisements, labels, stamps, envelopes Sealing and other pasting. Background technique [0002] In the past, it was generally processed from natural materials such as gum arabic, bone glue, or animal glue, but their low-temperature bonding is slow, performance is poor, wetting speed is slow, and initial adhesion is low. Modern organic synthesis methods are used to prepare or use organic synthetics and processed plant starch as the main component, use small molecule alcohols as solvents, polyvinyl acetate and other polymers and glucose derivatives as the main components, and add other additives. Made into a water-based recycled adhesive. [0003] Utilizing the high water absorption performance of polyacrylamide, the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/26C09J133/10C08F2/22
Inventor 文秀芳曲爱兰皮丕辉程江杨卓如
Owner SOUTH CHINA UNIV OF TECH
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