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Organic silicon modified styrene-acrylic emulsion type pressure sensitive glue with high steric hindrance and low residual, and preparation method and application thereof

A styrene-acrylic emulsion, silicone technology, applied in the direction of adhesives, adhesive types, film/flake adhesives, etc., can solve the problem of reducing the pressure-sensitive properties of pressure-sensitive adhesives, easy hydrolysis of silicone monomers, and system cohesion. Instability and other problems, to achieve the effect of reducing the side reactions of hydrolysis and self-condensation, reducing hydrolysis and self-condensation, and narrowing the particle size distribution

Inactive Publication Date: 2015-02-18
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of siloxane containing double bonds and acrylate free radical copolymerization to introduce siloxane still has some shortcomings, such as the easy hydrolysis and condensation of silicone monomers, and early cross-linking polymerization makes the system coagulation unstable.
The reactivity ratios of vinyl siloxane and acrylate monomers are quite different, and the conversion rate of monomers during copolymerization is low, which will reduce the pressure-sensitive properties of pressure-sensitive adhesives

Method used

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  • Organic silicon modified styrene-acrylic emulsion type pressure sensitive glue with high steric hindrance and low residual, and preparation method and application thereof
  • Organic silicon modified styrene-acrylic emulsion type pressure sensitive glue with high steric hindrance and low residual, and preparation method and application thereof
  • Organic silicon modified styrene-acrylic emulsion type pressure sensitive glue with high steric hindrance and low residual, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 35.5g of butyl acrylate, 35.5g of isooctyl acrylate, 1.6g of acrylic acid, 3.6g of hydroxypropyl acrylate, 2.2g of methyl methacrylate, and 1.7g of styrene, and mix them evenly to obtain a mixed monomer; mix 48ml of water, Add 1.6g sodium dodecyl sulfate (SDS) and 0.8g octylphenol polyoxyethylene ether (OP-10) into the pre-emulsification bottle and stir to dissolve, add the weighed mixed monomer, and pre-emulsify for 20 minutes under stirring at 6000r / min Minutes to get pre-emulsion.

[0035] Add 26ml of water into a four-neck flask, add aqueous sodium bicarbonate solution (0.2g of sodium bicarbonate dissolved in 10ml of water), protect it with nitrogen, put it in an oil bath at 60°C, and measure about 1 / 5 of the pre-prepared solution with a graduated cylinder. After adding the emulsion, stir at a speed of 260 rpm, raise the temperature to 75°C, add an aqueous initiator solution (0.3g potassium persulfate is dissolved in 10ml water), and continue stirring for 60 m...

Embodiment 2

[0040] Weigh 32.8g of butyl acrylate, 32.8g of isooctyl acrylate, 1.6g of acrylic acid, 3.6g of hydroxypropyl acrylate, 5.2g of methyl methacrylate, and 4g of styrene, and mix them uniformly to obtain a mixed monomer. Add 48ml of water, 1.6g of sodium dodecyl sulfate (SDS), 0.8g of octylphenol polyoxyethylene ether (OP-10) into the pre-emulsification bottle and stir to dissolve, add the weighed mixed monomer, and stir at 10000r / min Lower pre-emulsification for 20 minutes to obtain a pre-emulsion.

[0041] Add 26ml of water into a four-neck flask, add aqueous sodium bicarbonate solution (0.2g of sodium bicarbonate dissolved in 10ml of water), protect it with nitrogen, put it in an oil bath at 70°C, and measure about 1 / 5 of the pre-prepared solution with a measuring cylinder. After adding the emulsion, stir at a speed of 260 rpm, raise the temperature to 80°C, add an aqueous initiator solution (0.3g potassium persulfate is dissolved in 10ml water), and continue stirring for 30 m...

Embodiment 3

[0046] Weigh 35.5g of butyl acrylate, 35.5g of isooctyl acrylate, 1.6g of acrylic acid, 3.6g of hydroxypropyl acrylate, 2.2g of methyl methacrylate, and 1.7g of styrene, and mix them evenly to obtain a mixed monomer; mix 48ml of water, Add 1.6g sodium dodecyl sulfate (SDS) and 0.8g octylphenol polyoxyethylene ether (OP-10) into the pre-emulsification bottle and stir to dissolve, add the weighed mixed monomer, and pre-emulsify for 20 minutes under stirring at 10000r / min Minutes to get pre-emulsion.

[0047] Add 26ml of water into a four-neck flask, add aqueous sodium bicarbonate solution (0.2g of sodium bicarbonate dissolved in 10ml of water), protect it with nitrogen, put it in an oil bath at 70°C, and measure about 1 / 5 of the pre-prepared solution with a measuring cylinder. After adding the emulsion, stir at a speed of 260 rpm, raise the temperature to 80°C, add an aqueous initiator solution (0.3g potassium persulfate is dissolved in 10ml water), and continue stirring for 30 ...

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Abstract

The invention belongs to the technical field of a pressure sensitive adhesive for packing of electronic products, and discloses organic silicon modified styrene-acrylic emulsion type pressure sensitive glue with high steric hindrance and low residual, and a preparation method thereof. The method comprises the following steps: firstly synthesizing a polyacrylate seed emulsion, then introducing organic silicon by using the after dripping technique, and processing heated glue films to urge the cross-linking of carboxyl and hydroxyl to obtain the organic silicon modified styrene-acrylic emulsion type pressure sensitive glue with low residual. The siloxane with larger steric hindrance is used, so that side effects of hydrolysis and autocondensation of the organic silicon in a polyreaction process are reduced, the gel rate is reduced, the conversion rate is increased, and the stability of emulsion is improved. The glue films are heated and processed, so that the cohesion of the pressure sensitive glue is further improved. Through adoption of the method, a complex working procedure of additionally adding cross-linking agents for improving the cohesion is avoided, the disadvantages that the cross-linking agents are additionally added for modifying and improving the cohesion, and the initial adhesion and the peeling strength of the pressure sensitive glue can be sacrificed at the same time are overcome, and water resistance, high temperature resistance and aging resistance are improved.

Description

technical field [0001] The invention belongs to the technical field of pressure-sensitive adhesives used for electronic product packaging, and in particular relates to a low-residue, high-steric silicone modified styrene-acrylic emulsion pressure-sensitive adhesive and its preparation and application. Background technique [0002] During the production, transportation and storage of electronic products, they need to be packaged and protected to avoid mechanical scratches or dust pollution. The commonly used method is to paste a layer of surface protection film, and then remove the protection film after processing, transportation and other treatments. [0003] But the problem is that there will be residual glue after peeling off, which will affect the use and performance of electronic products. At present, it is mainly solved by increasing the degree of crosslinking of pressure-sensitive adhesives, adding ultraviolet light absorbers to reduce aging, using hard substrates or ...

Claims

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Application Information

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IPC IPC(8): C09J133/08C08F220/18C08F220/06C08F220/28C08F220/14C08F212/08C08F230/08C08F2/30C08F2/26C09J7/02
Inventor 廖兵李朋娟庞浩李海涛黄健恒程劲松刘海露马哲
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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