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High-temperature-resistant pressure-sensitive coating material, preparation method and protective film

A pressure-sensitive coating, high-temperature resistance technology, applied in pressure-sensitive films/sheets, film/sheet-like adhesives, non-polymer adhesive additives, etc. Problems such as poor stability of the protective film to achieve good high temperature resistance

Active Publication Date: 2021-01-22
SICHUAN YUXI ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the conventional polyacrylate pressure-sensitive adhesive protective film has poor stability, such as poor performance in high temperature resistance, heat and humidity resistance, acid and alkali resistance, etc. The present invention provides a method to solve the above problems High temperature resistant pressure sensitive coating material and protective film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment provides a high temperature resistant pressure sensitive coating protective film, prepared by the following steps:

[0032] Step 1, the raw material composition of the pressure-sensitive coating material:

[0033] The raw materials of pressure-sensitive coating materials include by mass percentage:

[0034] Polyacrylate pressure sensitive adhesive: 50%; Crosslinking agent: 1%; Solvent: 30%; Auxiliary: 19%;

[0035] The crosslinking agent adopts a liquid mixture of hexamethylene diisocyanate and dicyclohexylmethane diisocyanate and diphenylmethane diisocyanate hollow particles; hexamethylene diisocyanate, dicyclohexylmethane diisocyanate and diphenylmethane diisocyanate The mass ratio of the three is: 1:1:5.

[0036] The auxiliary agent adopts ethanol, and the added mass of the auxiliary agent is 38% of the mass of the polyacrylate pressure-sensitive adhesive.

[0037] The outer diameter of the hollow particles is 10mm.

[0038] Described solvent adop...

Embodiment 2

[0050] This embodiment provides a high temperature resistant pressure sensitive coating protective film, prepared by the following steps:

[0051] Step 1, the raw material composition of the pressure-sensitive coating material:

[0052] The raw materials of pressure-sensitive coating materials include by mass percentage:

[0053] Polyacrylate pressure sensitive adhesive: 65%; crosslinking agent: 5%; solvent: 20%; additives: 10%;

[0054] The crosslinking agent adopts a liquid mixture of hexamethylene diisocyanate and dicyclohexylmethane diisocyanate and diphenylmethane diisocyanate hollow particles; hexamethylene diisocyanate, dicyclohexylmethane diisocyanate and diphenylmethane diisocyanate The mass ratio of the three is: 1:1:5.

[0055] The auxiliary agent adopts ethanol, and the added mass of the auxiliary agent is 15% of the mass of the polyacrylate pressure-sensitive adhesive.

[0056] The outer diameter of the hollow particles is 10mm.

[0057] Described solvent adop...

Embodiment 3

[0069] This embodiment provides a high temperature resistant pressure sensitive coating protective film, prepared by the following steps:

[0070] Step 1, the raw material composition of the pressure-sensitive coating material:

[0071] The raw materials of pressure-sensitive coating materials include by mass percentage:

[0072] Polyacrylate pressure sensitive adhesive: 56%; Crosslinking agent: 2%; Solvent: 29%; Auxiliary: 13%;

[0073] The crosslinking agent adopts a liquid mixture of hexamethylene diisocyanate and dicyclohexylmethane diisocyanate and diphenylmethane diisocyanate hollow particles; hexamethylene diisocyanate, dicyclohexylmethane diisocyanate and diphenylmethane diisocyanate The mass ratio of the three is: 1:1:5.

[0074] The auxiliary agent adopts ethanol, and the added mass of the auxiliary agent is 23% of the mass of the polyacrylate pressure-sensitive adhesive.

[0075] The outer diameter of the hollow particles is 10mm.

[0076] Described solvent adop...

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Abstract

The invention discloses a high-temperature-resistant pressure-sensitive coating material, a preparation method and a protective film. The high-temperature-resistant pressure-sensitive coating materialcomprises the following raw materials in percentage by mass: 50-65% of a polyacrylate pressure-sensitive adhesive; 0.5%-6% of a cross-linking agent; 10%-30% of a solvent; and 5%-20% of an auxiliary agent; wherein the cross-linking agent is prepared from a liquid mixture of hexamethylene diisocyanate and dicyclohexyl methane diisocyanate and diphenyl methane diisocyanate hollow particles; the outer diameter of the hollow particles ranges from 1 mm to 80 mm; and ethanol is adopted as the auxiliary agent. By improving the kinds, proportions, and states of isocyanate cross-linking agents added into the composition, adding auxiliaries, and adjusting the ratio of raw materials of the coating material, the polyacrylate pressure-sensitive adhesive makes fully contact with theisocyanate cross-linking agents, cross-linking reactions are performed fully; and at the same time, a protective film having the advantages of high temperature resistance, wet resistance, heat resistance, acid resistance,and alkali resistance is obtained.

Description

technical field [0001] The invention relates to the technical field of display screen protective films, in particular to a high-temperature-resistant pressure-sensitive coating material, a preparation method and a protective film. Background technique [0002] In order to prevent the surface of the electronic product screen from being scratched or worn, which will affect the use effect, a screen protective film is generally pasted on the screen surface of the electronic product. The protective film generally consists of a substrate layer and an adhesive layer coated on the substrate layer. This has high requirements for the adhesive, which can withstand high temperature, strong acid and strong alkali, etc., so as to be able to well protect the local position of the smartphone during the manufacturing process. [0003] In the prior art, during the preparation of the pressure-sensitive coating solution, an isocyanate crosslinking agent (with a highly reactive isocyanate group...

Claims

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Application Information

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IPC IPC(8): C09J133/04C09J11/06C09J7/38C09J7/25
CPCC08K2201/014C09J11/06C09J133/04C09J2433/00C09J2467/006C09J7/255C09J7/385C08K5/29
Inventor 许显成张建军王中正邬艺
Owner SICHUAN YUXI ELECTRONICS TECH CO LTD