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Preparation method of coconut-shell cellulose modified acrylate pressure-sensitive adhesive

A technology of acrylate and cellulose, applied in the field of preparation of coconut shell cellulose modified acrylate pressure-sensitive adhesive, can solve the problems of low initial tack, slow drying speed, difficult peeling, etc. The effect of strong force, convenient and fast use, and easy process control

Inactive Publication Date: 2016-11-16
仇颖超
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention: Aiming at the problems that the common traditional acrylic pressure-sensitive adhesives are easily affected by temperature and solvents, difficult to peel off, low initial adhesion, poor holding force, and slow drying speed, a coconut shell adhesive is provided. The preparation method of cellulose-modified acrylate pressure-sensitive adhesive, the method uses coconut shell as raw material, extracts coconut shell cellulose through alkaline peroxide, uses it as cross-linking agent and acrylate pre-emulsion cross-linking modification, and prepares A modified emulsion is applied to the base material and dried to obtain a pressure-sensitive adhesive. The present invention utilizes coconut shell cellulose to have a central hole, longitudinal grooves, transverse branches, good flexibility, air permeability and good wear resistance. Ester emulsion cross-linking modification increases the cross-network structure of acrylate pressure-sensitive adhesives, and produces chemical bonds between linear molecules, thereby improving the peel strength, initial adhesion and holding force of pressure-sensitive adhesives, and shortening the drying time. It solves the defects of traditional single-component acrylic pressure-sensitive adhesives and has broad application prospects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] First, weigh 100g of coconut shell and put it into a jet mill to crush it and pass it through a 200-mesh standard sieve. Add the sieved coconut shell powder to 800mL of 10% hydrogen peroxide solution, then add 0.5g of magnesium sulfate and use the concentration Adjust the pH of the mixed solution to 11 for a 1mol / L sodium hydroxide solution; then put the mixed solution after the above pH adjustment into a microwave oscillator, heat up to 60°C, and react with 200W microwave oscillation for 3 hours. The reaction liquid was transferred into a horizontal centrifuge, centrifuged at 4000r / min for 15min, separated to obtain the lower precipitate, then transferred to the Buchner funnel, filtered and washed with absolute ethanol and distilled water for 3 times, and finally put into the oven , dried at 50°C for 2 hours to obtain coconut shell cellulose, and set aside; add 0.3g sodium lauryl sulfate, 1.3g alkylphenol polyoxyethylene to a four-necked flask equipped with a stirrer, t...

example 2

[0022]First, weigh 150g of coconut shell and put it into a jet mill to pulverize and pass through a 200-mesh standard sieve. Add the sieved coconut shell powder to 850mL of 10% hydrogen peroxide solution, then add 0.8g of magnesium sulfate and use the concentration Adjust the pH of the mixed solution to 11.5 for 1mol / L sodium hydroxide solution; then put the mixed solution after the pH adjustment above into a microwave oscillator, heat up to 65°C, and react with 250W microwave oscillation for 4 hours. The reaction solution was transferred into a horizontal centrifuge, centrifuged at 4500r / min for 18 minutes, separated to obtain the lower precipitate, then transferred to the Buchner funnel, filtered and washed with absolute ethanol and distilled water for 4 times, and finally put into the oven , dried at 55°C for 2.5h to obtain coconut shell cellulose, and set aside; add 0.4g sodium lauryl sulfate, 1.4g alkylphenol polyoxygen to a four-necked flask equipped with a stirrer, therm...

example 3

[0025] First, weigh 200g of coconut shell and put it into a jet mill to pulverize and pass through a 200-mesh standard sieve. Add the sieved coconut shell powder to 900mL of 10% hydrogen peroxide solution, then add 1.0g of magnesium sulfate and use the concentration Adjust the pH of the mixed solution to 12 for a 1mol / L sodium hydroxide solution; then put the mixed solution after the above pH adjustment into a microwave oscillator, heat up to 70°C, and react with 300W microwave oscillation for 5 hours. The reaction solution was transferred into a horizontal centrifuge, centrifuged at 5000r / min for 20min, separated to obtain the lower precipitate, then transferred to the Buchner funnel, filtered and washed with absolute ethanol and distilled water for 5 times, and finally put into the oven , dried at 60°C for 3 hours to obtain coconut shell cellulose, and set aside; add 0.5g sodium lauryl sulfate, 1.5g alkylphenol polyoxyethylene to a four-necked flask equipped with a stirrer, t...

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Abstract

The invention discloses a preparation method of a coconut-shell cellulose modified acrylate pressure-sensitive adhesive, belonging to the technical field of the preparation of the pressure-sensitive adhesive. The preparation method comprises the following steps: by taking coconut shells as a raw material, extracting coconut-shell cellulose by virtue of alkaline peroxide, utilizing the coconut-shell cellulose as a cross-linking agent to modify acrylate pre-emulsion in a cross-linking manner, thus obtaining modified emulsion, smearing the modified emulsion on a base material, and drying to obtain the pressure-sensitive adhesive. The acrylate emulsion is cross-linked and modified by utilizing the characteristics of the coconut-shell cellulose such as middle holes, longitudinal valleys, transverse branches, good flexibility, good air permeability and good wear resistance to add a cross-linking netted structure of the acrylate pressure-sensitive adhesive, and linear molecules are chemically bonded, so that the stripping strength, primary adhesive force and lasting adhesive force of the pressure-sensitive adhesive are improved, the drying time is shortened, the defects of a traditional single-component acrylate pressure-sensitive adhesive are overcome, and the application prospect is wide.

Description

technical field [0001] The invention discloses a preparation method of coconut shell cellulose modified acrylate pressure-sensitive adhesive, which belongs to the technical field of pressure-sensitive adhesive preparation. Background technique [0002] With the continuous advancement of science and technology, there are more and more types of pressure-sensitive adhesives and their products. Pressure-sensitive adhesives have developed to various types such as solvent-type, emulsion-type, and hot-melt type. With the enhancement of human awareness of environmental protection , Emulsion-type and hot-melt pressure-sensitive adhesives are gradually replacing solvent-type pressure-sensitive adhesives. The application fields are becoming more and more extensive. The main application fields are medical treatment, packaging, electronics, industry, culture and education, etc. In short, pressure-sensitive adhesives and their products have been applied to every place in our work and life...

Claims

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Application Information

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IPC IPC(8): C09J7/02C09J133/08C09J11/08C08F220/18C08F220/06C08F220/14
CPCC08F220/18C08F220/1804C08L2205/16C08L2312/00C09J7/22C09J7/38C09J11/08C09J133/08C09J2301/312C09J2423/106C09J2433/00C08L97/02C08F220/1808C08F220/06C08F220/14
Inventor 仇颖超林茂平薛蕾
Owner 仇颖超
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