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A kind of high temperature resistant acid and alkali resistant acrylate pressure sensitive adhesive composition and protective film

A technology of acrylate and pressure-sensitive adhesives, applied in the direction of pressure-sensitive films/sheets, ester copolymer adhesives, non-polymer adhesive additives, etc., which can solve the problems of high cost, low production efficiency, and inability to meet simultaneously , to achieve high transparency and increase the effect of cross-linking

Active Publication Date: 2020-12-15
深圳市益达兴科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The protective film cannot meet the requirements of being able to withstand high temperature for a long time (160°C, more than 2 hours) without fogging and glue residue, and resistant to strong acid and alkali immersion (pH2 or pH 13, 1h) without dissolution and glue residue.
In the manufacturing process of smartphone back cover (3D glass), it is still necessary to use high temperature or acid and alkali resistant process protective film for protection, the production efficiency is low and the cost is high

Method used

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  • A kind of high temperature resistant acid and alkali resistant acrylate pressure sensitive adhesive composition and protective film
  • A kind of high temperature resistant acid and alkali resistant acrylate pressure sensitive adhesive composition and protective film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 100g of the acrylate adhesive prepared above, 1g of 5% Al 3+ Add metal salt crosslinking agent, 1.5g hexamethylene diisocyanate, 10g toluene and 90g ethyl acetate into the container with stirring device, and stir thoroughly for 30 minutes. After the bubbles disappear, filter with a filter of ≤5 μm to remove impurities to prepare an acrylate pressure-sensitive adhesive composition.

Embodiment 2

[0024] 100g of the acrylate adhesive prepared above, 1g of 5% Al 3+ Add metal salt crosslinking agent, 2.5g hexamethylene diisocyanate, 10g toluene and 90g ethyl acetate into the container with stirring device, and stir thoroughly for 30 minutes. After the bubbles disappear, filter with a filter of ≤5 μm to remove impurities to prepare an acrylate pressure-sensitive adhesive composition.

Embodiment 3

[0026] 100g of the acrylate adhesive prepared above, 0.5g of 5% Al 3+ Add metal salt crosslinking agent, 3g hexamethylene diisocyanate, 10g toluene and 90g ethyl acetate into the container with stirring device, and stir thoroughly for 30 minutes. After the bubbles disappear, filter with a filter of ≤5 μm to remove impurities to prepare an acrylate pressure-sensitive adhesive composition.

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Abstract

The present invention provides a high-temperature-resistant acid-resistant and alkali-resistant acrylate pressure sensitive adhesive composition, which comprises, by weight, 100 parts of an acrylate adhesive, 1.5-3 parts of an isocyanate cross-linking agent, 0.5-1.5 parts of a metal ion cross-linking agent, and 10-200 parts of an organic solvent. The invention further provides a high-temperature-resistant acid-resistant and alkali-resistant acrylate pressure sensitive adhesive protection film prepared from the composition. According to the acrylate pressure-sensitive adhesive composition of the present invention, the isocyanate cross-linking agent and the metal ion cross-linking agent are simultaneously used so as to significantly increase the cross-linking degree, and can react to form the dense network structure so as to achieve the high transparency, such that the protection film made of the acrylate pressure-sensitive adhesive composition cannot produce mist forming and adhesive residue at a high temperature (160 DEG C, more than 2 h), and cannot produce dissolving and adhesive residue after strong acid and alkali (pH value of 2 or 13, respectively 1 h) soaking.

Description

technical field [0001] The invention relates to the technical field of acrylate pressure-sensitive adhesives, in particular to a high-temperature-resistant, acid- and alkali-resistant acrylate pressure-sensitive adhesive composition and an acrylate pressure-sensitive adhesive protective film prepared from the acrylate pressure-sensitive adhesive composition. The film is especially useful as a protective film for the back cover of a 3D glass mobile phone. Background technique [0002] In the manufacturing process of smartphone back cover (3D glass), it needs to go through processes such as screen printing, cleaning with strong acid and strong alkali, spraying, coating, etc. These production processes have requirements for high temperature resistance, strong acid and strong alkali resistance, and need to use process protection film to protect local areas from scratching, corrosion or contamination. [0003] The existing acrylate pressure-sensitive adhesive protective film usu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/08C09J11/06C09J7/25C09J7/38
CPCC09J11/06C09J133/08C09J2467/006C09J7/255C09J7/385C09J2301/122C09J2301/302C08K5/29
Inventor 樊勤海樊秋实胡文光
Owner 深圳市益达兴科技股份有限公司
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