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Core-shell-structured organosilicone internal crosslinking styrene-acrylic emulsion pressure-sensitive adhesive for protective film, and preparation method and application thereof

A core-shell structure, silicone technology, applied in the field of pressure-sensitive adhesives, can solve the problems of easy increase in peel strength, poor water resistance of pressure-sensitive adhesives, etc.

Active Publication Date: 2020-05-19
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to address the shortcomings of the existing emulsion-type acrylate pressure-sensitive adhesives, such as poor water resistance and easy increase in later peel strength, by modifying acrylate with styrene, and introducing surface-energy silicone as an internal crosslinking monomer at the same time. In addition, the core-shell structure emulsion polymerization method is adopted to synthesize the core-shell structure organosilicon internal cross-linking modified styrene-acrylic emulsion pressure-sensitive adhesive, which improves the cohesion and water resistance of the emulsion pressure-sensitive adhesive, and at the same time reduces the surface tension of the pressure-sensitive adhesive and reduces peeling The growth rate of strength (note: after the protective film is attached to the protected substrate, the peel strength will increase with time, and the growth rate indicates the percentage of the increase in the later peel strength to the initial peel strength

Method used

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  • Core-shell-structured organosilicone internal crosslinking styrene-acrylic emulsion pressure-sensitive adhesive for protective film, and preparation method and application thereof
  • Core-shell-structured organosilicone internal crosslinking styrene-acrylic emulsion pressure-sensitive adhesive for protective film, and preparation method and application thereof
  • Core-shell-structured organosilicone internal crosslinking styrene-acrylic emulsion pressure-sensitive adhesive for protective film, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The preparation method of the core-shell structure organosilicon internal crosslinking styrene-acrylic emulsion pressure-sensitive adhesive for protective film is as follows:

[0058] (1) Preparation of shell pre-emulsion

[0059] 62 parts of butyl acrylate, 30 parts of isooctyl acrylate, 2.5 parts of styrene, 1.5 parts of branched vinyl silicone oil, 2 parts of hydroxypropyl acrylate, 2 parts of acrylic acid, 0.15 parts of nonylphenol polyoxyethylene ether ammonium sulfate, 0.06 parts of phenol polyoxyethylene ether (10), 0.18 parts of sodium dodecyl diphenyl ether disulfonate, 0.3 parts of ammonium persulfate, 0.1 parts of sodium bicarbonate, and 50 parts of deionized water were mixed at 20 to 40 Stir and emulsify at a speed of 2000-3000 rpm for 20-40 minutes at ℃ to obtain a shell pre-emulsion;

[0060] (2) Preparation of nuclear emulsion:

[0061] 40 parts of butyl acrylate, 19 parts of isooctyl acrylate, 37 parts of styrene, 1 part of branched vinyl silicone oil,...

Embodiment 2

[0072] A core-shell structure styrene-acrylic emulsion pressure-sensitive adhesive is prepared according to the following method steps:

[0073] (1) Preparation of shell pre-emulsion

[0074] 58 parts of butyl acrylate, 31 parts of isooctyl acrylate, 5 parts of styrene, 2 parts of branched vinyl silicone oil, 2 parts of hydroxypropyl acrylate, 2 parts of acrylic acid, 0.2 parts of nonylphenol polyoxyethylene ether ammonium sulfate, nonylphenol 0.08 part of phenol polyoxyethylene ether (10), 0.24 part of sodium dodecyl diphenyl ether disulfonate, 0.3 part of ammonium persulfate, 0.1 part of sodium bicarbonate, and 50 parts of deionized water were mixed at 20 to 40 Stir and emulsify at a speed of 2000-3000 rpm for 20-40 minutes at ℃ to obtain a shell pre-emulsion;

[0075] (2) Preparation of nuclear emulsion:

[0076] 35 parts of butyl acrylate, 19 parts of isooctyl acrylate, 42 parts of styrene, 1 part of branched vinyl silicone oil, 1 part of hydroxypropyl acrylate, 2 parts ...

Embodiment 3

[0087] The core-shell structure styrene-acrylic emulsion pressure-sensitive adhesive of the present invention is prepared according to the following weight ratios and method steps:

[0088] (1) Preparation of shell pre-emulsion

[0089] 62 parts of butyl acrylate, 30 parts of isooctyl acrylate, 2.5 parts of styrene, 1.5 parts of branched vinyl silicone oil, 2 parts of hydroxypropyl acrylate, 2 parts of acrylic acid, 0.15 parts of nonylphenol polyoxyethylene ether ammonium sulfate, 0.06 parts of phenol polyoxyethylene ether (10), 0.18 parts of sodium dodecyl diphenyl ether disulfonate, 0.3 parts of ammonium persulfate, 0.1 parts of sodium bicarbonate, and 50 parts of deionized water were mixed at 20 to 40 Stir and emulsify at a speed of 2000-3000 rpm for 20-40 minutes at ℃ to obtain a shell pre-emulsion;

[0090] (2) Preparation of nuclear emulsion:

[0091] 35 parts of butyl acrylate, 19 parts of isooctyl acrylate, 42 parts of styrene, 1 part of branched vinyl silicone oil, ...

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Abstract

The invention belongs to the technical field of pressure-sensitive adhesives for surface protection of building aluminum profiles, stainless steel, household appliances and the like. The invention discloses a core-shell-structured organosilicone internal crosslinking styrene-acrylic emulsion pressure-sensitive adhesive and a preparation method thereof. The adhesive is prepared by introducing organosilicone for internal crosslinking modification of a styrene-acrylic emulsion and adopting an emulsion polymerization mode of a core-shell structure. According to the obtained core-shell-structured organosilicone internal crosslinking styrene-acrylic emulsion pressure-sensitive adhesive, the cohesion and water resistance of the pressure-sensitive adhesive prepared by conventional polymerization of pure acrylate and styrene-acrylic are obviously improved, the surface tension of the pressure-sensitive adhesive is reduced, the later growth amplitude of peel strength is reduced, and no residual adhesive is left when the protective film is torn off from a protected surface.

Description

technical field [0001] The invention belongs to a pressure-sensitive adhesive, in particular to a core-shell structure organosilicon internally cross-linked styrene-acrylic emulsion pressure-sensitive adhesive applied to protective films with smooth surfaces, such as architectural aluminum profiles, stainless steel, glass, and household appliances, and a preparation method thereof and apply. Background technique [0002] Pressure-sensitive adhesive is an adhesive that is sensitive to pressure, does not require heating, does not require solvents, does not require high pressure, and can be bonded with a slight pressure or a press of a finger. It is characterized by being easy to stick, not difficult to remove, and not damaged when peeled off, and the adhesive layer will not dry up in a long period of time, so pressure-sensitive adhesives are also called self-adhesives. Most of the pressure-sensitive adhesives are made into various pressure-sensitive adhesive products such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F285/00C08F220/18C08F283/12C08F212/08C08F2/26C08F2/30C09J7/24C09J7/38
CPCC08F285/00C08F283/124C08F2/26C08F2/30C09J7/38C09J7/243C09J2451/00C09J2423/046C08F212/08
Inventor 毛胜华姚小龙何伟胡晓杨升吴旭黄明伟李凤宇曹阳
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY