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Acrylic emulsion pressure-sensitive adhesive and preparation method thereof

A technology of acrylic emulsion and butyl acrylate, which is applied in the direction of adhesives, adhesive types, ester copolymer adhesives, etc., can solve the problems of poor dispersion of nano-silica, high reactivity, and easy agglomeration. To achieve the effect of improving the degumming phenomenon, increasing the peel strength, and stabilizing the heat release

Inactive Publication Date: 2021-09-24
SUZHOU SIDIKE NEW MATERIALS SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The peel force of the pressure-sensitive adhesive prepared by using this adhesive is only about 9N, which is lower than the performance of the oil-based pressure-sensitive adhesive, which limits its application range to a certain extent.
[0004] A patented high-temperature-resistant water-based acrylate pressure-sensitive adhesive and its preparation method (CN 111187585A) synthesizes two adhesives containing carboxyl groups and epoxy groups, and mixes them in a certain proportion before adding some carbon dioxide Coating after silicon, the adhesive can only cross-link the carboxyl group and the epoxy group at high temperature (110-120°C) to achieve high temperature resistance. bad sex
Trifunctional monomers are used in the glue synthesis process, which has high reactivity, and the glue is easy to gel. The added nano-silica is not well dispersed in the emulsion adhesive, and agglomeration is prone to occur. The prepared spline has a viscosity of about 8N.

Method used

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  • Acrylic emulsion pressure-sensitive adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Accurately weigh 30 grams of emulsifier nonylphenol polyoxyethylene ether ammonium sulfate (Co-436), fully dissolve in 1100 grams of deionized water, weigh 50 grams of hydroxyethyl acrylate, 80 grams of carboxyethyl acrylate, acrylic acid 3,300 grams of butyl ester and 800 grams of isobornyl acrylate were added to the aqueous solution of the emulsifier in turn under agitation to fully stir and disperse for 30 minutes to prepare a stable pre-emulsion. Add 1500 grams of water, 12 grams of buffer, and 6 grams of emulsifier NRS-10 (special alcohol ether sulfate containing allyl group, Shanghai Zhongcheng Fine Chemical Co., Ltd.) in the reaction kettle, start to heat up after stirring evenly. After the temperature was raised to 83°C, 15 grams of initiator was added to the reactor, and 50 grams of pre-emulsion was added dropwise as a seed emulsion. After the seed emulsion was added dropwise, it was kept warm for 5 minutes to allow it to fully react. After the heat preservatio...

Embodiment 2

[0029] Accurately weigh 40 grams of emulsifier nonylphenol polyoxyethylene ether ammonium sulfate, fully dissolve in 1100 grams of deionized water, weigh 50 grams of hydroxyethyl acrylate, 80 grams of carboxyethyl acrylate, and 3000 grams of butyl acrylate, 500 grams of ethyl acrylate and 500 grams of isobornyl acrylate were added to the aqueous solution of the emulsifier in turn under agitation to fully stir and disperse for 30 minutes to prepare a stable pre-emulsion. Add 1500 grams of water, 12 grams of buffer, and 6 grams of emulsifier NRS-10 into the reaction kettle, stir well and then start to heat up. After the temperature was raised to 83°C, 15 grams of initiator was added to the reactor, and 100 grams of pre-emulsion was added dropwise as the seed emulsion. After the seed emulsion was added dropwise, it was kept warm for 5 minutes to allow it to fully react. After the heat preservation is over, the remaining pre-emulsion and the aqueous solution of the initiator are a...

Embodiment 3

[0031]Accurately weigh 40 grams of emulsifier nonylphenol polyoxyethylene ether ammonium sulfate, fully dissolve in 1100 grams of deionized water, weigh 50 grams of hydroxyethyl acrylate, 50 grams of carboxyethyl acrylate, and 30 grams of methacrylic acid, 3000 grams of butyl acrylate, 600 grams of ethyl acrylate, and 600 grams of isobornyl acrylate were added to the aqueous solution of the emulsifier in turn under stirring conditions and fully stirred and dispersed for 30 minutes to form a stable pre-emulsion. Add 1500 grams of water, 12 grams of buffer, and 6 grams of emulsifier NRS-10 into the reaction kettle, stir well and then start to heat up. After the temperature was raised to 83°C, 13 grams of initiator was added to the reactor, and 0 grams of pre-emulsion was added dropwise as the seed emulsion. After the seed emulsion was added dropwise, it was kept warm for 5 minutes to allow it to fully react. After the heat preservation is over, the remaining pre-emulsion and the...

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Abstract

The invention discloses an acrylic emulsion pressure-sensitive adhesive and a preparation method thereof. The preparation method comprises the steps of adding hydroxyethyl acrylate, carboxyethyl acrylate, butyl acrylate and isobornyl acrylate into an aqueous solution of an emulsifier nonylphenol polyoxyethylene ether ammonium sulfate, and stirring and dispersing to prepare a stable pre-emulsion; adding deionized water, an emulsifier NRS-10 and a buffer agent into a reaction kettle, heating to the temperature of 80-86 DEG C, adding part of an initiator into the reaction kettle, then adding part of the prepared pre-emulsion as a seed emulsion, reacting after the seed emulsion is added, then synchronously dropwise adding the rest of the pre-emulsion and an aqueous solution of the initiator, and preserving heat after dropwise adding; and adding a defoaming agent and a wetting agent after the heat preservation is finished, and filtering to obtain the acrylic emulsion pressure-sensitive adhesive. The overall performance of the prepared emulsion type acrylate pressure-sensitive adhesive is equivalent to that of an oily pressure-sensitive adhesive, so that the emulsion type acrylate pressure-sensitive adhesive can replace the oily pressure-sensitive adhesive to reduce the emission of volatile organic compounds.

Description

technical field [0001] The invention relates to an acrylic emulsion pressure-sensitive adhesive and a preparation method thereof. Background technique [0002] With the implementation of GB33372-2020 "Limits of Volatile Organic Compounds in Adhesives", the country has increasingly strict control over the content of volatile organic compounds in adhesives. The traditional coating industry has basically switched to water-based coatings. The adhesive industry is also developing in the direction of solvent-free adhesives such as water-based adhesives, hot-melt adhesives, and UV-curable adhesives. Hot-melt adhesives have high requirements for coating, UV curing has special requirements for equipment, and monomer conversion is incomplete, water-based adhesives are easy to coat, production and storage requirements are lower than oil-based adhesives, but overall performance lower than oil-based adhesives. Therefore, it is necessary to develop a water-based adhesive with properties...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C08F220/18C08F220/20C08F220/28C08F2/28C08F2/26
CPCC09J133/066C08F220/1804C08F2/28C08F2/26C08F220/20C08F220/283C08F220/1811
Inventor 金闯曲鹏
Owner SUZHOU SIDIKE NEW MATERIALS SCI & TECH
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