High-temperature-resistant protective film

A high-temperature resistant protective film and release film technology, which is applied in the direction of pressure-sensitive film/sheet, polymer adhesive additive, film/sheet-shaped adhesive, etc., can solve the problem of large shrinkage rate of pressure-sensitive adhesive layer The range is limited and other issues, to achieve the effect of reduced shrinkage, high stress relaxation rate, and improved high temperature resistance

Pending Publication Date: 2021-12-31
HEFEI LUCKY SCI & TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shrinkage rate of the pressure-sensitive adhesive layer after the high-temperature process is relatively large, and its application range is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Weigh 0.6g octadecyl acrylate, 0.4g hexadecyl methacrylate, 2g lauryl acrylate, 75g butyl acrylate, 8g methyl methacrylate, 2g vinyl acetate, 2g acrylic acid, 2 g of methacrylic acid and 8 g of hydroxyethyl acrylate were added to the reaction container, and the temperature was raised to 70°C. Evenly add 70g of initiator diluent dropwise, control the dropping time for 3 hours, and then keep warm for 2 hours. Continue to dropwise add 30g of the initiator diluent, control the dropwise addition time for 1 hour, and then keep the temperature for 1 hour. Then the synthesized resin is cooled to room temperature to obtain acrylate resin.

[0055] Weigh 30 g of the above-mentioned acrylate resin, 30 g of ethyl acetate, 0.4 g of isophorone diisocyanate, and 0.2 g of tetraglycidyl m-xylylenediamine epoxy resin, and mix them uniformly to obtain a coating solution. The coating solution is coated on the surface of a 23 μm thick PET substrate. After the PET substrate is subjected to...

Embodiment 2

[0057] Weigh 0.55g octadecyl acrylate, 0.55g hexadecyl methacrylate, 1.1g dodecyl acrylate, 80g isooctyl acrylate, 7.8g methyl methacrylate, 2g methacrylic acid, 8g of hydroxypropyl acrylate was added to the reaction vessel, and the temperature was raised to 70°C. Evenly add 70g of initiator diluent dropwise, control the dropping time for 3 hours, and then keep warm for 2 hours. Continue to dropwise add 30g of the initiator diluent, control the dropwise addition time for 1 hour, and then keep the temperature for 1 hour. Then the synthesized resin is cooled to room temperature to obtain acrylate resin.

[0058] Weigh 30g of the above-mentioned acrylate resin, 30g of ethyl acetate, 0.8g of dicyclohexylmethane diisocyanate, and 0.4g of hydrogenated bisphenol A epoxy resin, and mix them uniformly to obtain a coating solution. The coating solution is coated on the surface of a 50 μm thick PET substrate. After the PET substrate is subjected to high temperature resistance for 60 mi...

Embodiment 3

[0060] Weigh 2g hexadecyl methacrylate, 3g ethyl acrylate, 70g butyl acrylate, 10g isooctyl acrylate, 3g methyl methacrylate, 4g vinyl acetate, 2g acrylic acid, 2g methacrylic acid, 4g formazan Glycidyl acrylate was added to the reaction vessel, and the temperature was raised to 70°C. Evenly add 70g of initiator diluent dropwise, control the dropping time for 3 hours, and then keep warm for 2 hours. Continue to dropwise add 30g of the initiator diluent, control the dropwise addition time for 1 hour, and then keep the temperature for 1 hour. Then the synthesized resin is cooled to room temperature to obtain acrylate resin.

[0061] Weigh 30 g of the above-mentioned acrylate resin, 30 g of ethyl acetate, 0.8 g of cyclohexane diisocyanate, and 0.7 g of glycidyl hexahydrophthalate, and mix them uniformly to obtain a coating solution. The coating solution is coated on the surface of a 100 μm thick PET substrate. After the PET substrate is subjected to high temperature resistance ...

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Abstract

The invention belongs to the field of protective films, and relates to a high-temperature-resistant protective film which comprises a base material layer, a pressure-sensitive adhesive layer coating the surface of the base material layer, and a release film attached to the pressure-sensitive adhesive layer. The pressure-sensitive adhesive layer comprises acrylic resin and a composite curing agent which accounts for 2%-5% based on the weight of the acrylic resin. The acrylic resin is prepared from a long-chain acrylate monomer, an acrylate soft monomer, an acrylate hard monomer and an acrylate functional monomer through free radical polymerization. The weight percentages of the long-chain acrylic monomer, the acrylate soft monomer, the acrylate hard monomer and the acrylate functional monomer are 2%-3%, 75%-83%, 7%-10% and 8%-12% respectively. According to the technical scheme, an ITO conducting film or a nano-silver conducting film can be effectively protected, no adhesive residue exists after high-temperature manufacturing, the dyne value of the attached face of the conducting film is not reduced, and the warping degree is small.

Description

technical field [0001] The invention belongs to the technical field of protective films, and in particular relates to a high temperature resistant protective film. Background technique [0002] ITO conductive film and nano-silver conductive film are emerging industries in flexible screens, and the market prospect is very good. In the production process, the surface of the main substrate of this type of conductive film is not resistant to scratches and is easily polluted. Therefore, when making the conductive film, a specific protective film is required to prevent the surface from being scratched and polluted. [0003] The production process of this kind of conductive film needs to withstand high temperature treatment. The high temperature treatment process is an extremely strict test for the lamination products of the protective film. First, the pressure sensitive adhesive layer of the protective film is prone to residual glue or glue transfer during high temperature treatme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/38C09J133/08C09J11/06C09J11/08C09J7/25
CPCC09J7/385C09J133/14C09J11/06C09J11/08C09J7/255C09J2467/006C09J2301/122C09J2301/302C08L63/00C08K5/29
Inventor 李彩翠郑宇翔周守发牛正富安佳丽黄永华吴胜
Owner HEFEI LUCKY SCI & TECH IND
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