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Preparation process of a low-viscosity high-temperature resistant protective film

A high-temperature resistant protective film and preparation technology, which is applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc., can solve the problems of unstable viscosity, residual glue residue, and difficult to tear off, etc., so as to reduce the viscosity , easy to tear off, good fit effect

Active Publication Date: 2021-10-01
四川羽玺新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PET protective films on the market generally have some problems, such as low temperature resistance, difficult to tear off, residual glue residue, poor fit and unstable viscosity, etc.

Method used

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  • Preparation process of a low-viscosity high-temperature resistant protective film
  • Preparation process of a low-viscosity high-temperature resistant protective film
  • Preparation process of a low-viscosity high-temperature resistant protective film

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Experimental program
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Effect test

Embodiment 1

[0024] A preparation process for a low-viscosity high-temperature-resistant protective film, specifically comprising the following steps:

[0025] S1. PET film pretreatment: Corona treatment is performed on the PET film, and then washed with acetone and alcohol in sequence, and then the film is dried in a vacuum oven at 70°C for 12 hours, and set aside;

[0026] S2, preparing glue, the steps are as follows:

[0027] S21. Preparation of silicon-containing diphenol, specific steps: (1) Add 0.11mol of p-chlorophenol, 0.2mol of pyridine, and 100mL of anhydrous toluene into the reaction flask, add 0.12mol of trimethylchlorosilane dropwise under stirring in an ice bath, and drop After the addition, the temperature was raised to room temperature, stirred and reacted for 8 hours, the filtered solution was evaporated and concentrated and dried in vacuo to obtain a liquid intermediate product a; (2) Add 0.2 mol of sodium metal and 100 mL of anhydrous toluene into a three-necked flask, e...

Embodiment 2

[0032] A preparation process for a low-viscosity high-temperature-resistant protective film, specifically comprising the following steps:

[0033] S1. PET film pretreatment: Corona treatment was performed on the PET film, and then washed with acetone and alcohol in sequence, and then the film was dried in a vacuum oven at 70°C for 12 hours, and then set aside.

[0034] S2, preparing glue, the steps are as follows:

[0035] S21. Preparation of silicon-containing diphenol, specific steps: (1) Add 0.11mol of p-chlorophenol, 0.2mol of pyridine, and 100mL of anhydrous toluene into the reaction flask, add 0.12mol of trimethylchlorosilane dropwise under stirring in an ice bath, and drop After the addition, the temperature was raised to room temperature, stirred and reacted for 8 hours, the filtered solution was evaporated and concentrated and dried in vacuo to obtain a liquid intermediate product a; (2) Add 0.2 mol of sodium metal and 100 mL of anhydrous toluene into a three-necked f...

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Abstract

The invention discloses a preparation process of a low-viscosity and high-temperature-resistant protective film. The steps are as follows: S1. Prepare a PET film; S2. Prepare an adhesive liquid. The steps are as follows: S21. Prepare a silicon-containing diphenol; S22. Prepare a catalyst; S23 1. Vacuum dehydrate macromolecular polyol at 100-120°C for 1-5h, then cool to 60-80°C; then add organic solvent acetone and silicon-containing diphenol, stir and mix well, add isocyanate and catalyst, and stir at constant temperature for 5 -6h; cool to 30-50°C, finally add emulsifier and deionized water, and disperse at high speed for 2 hours to obtain a low-viscosity and high-temperature-resistant adhesive liquid; S3, apply the adhesive liquid on corona-treated Put it on the PET film, dry it in an oven at 100-110°C, cool it, and stick a protective layer on the side coated with the adhesive to obtain a PET protective film. The PET protective film prepared by the preparation process of the present invention has excellent properties such as high temperature resistance, low viscosity, easy tearing, no glue residue, and good adhesion, and is especially suitable for use in foaming materials.

Description

technical field [0001] The invention relates to the technical field of protective films, in particular to a preparation process of a low-viscosity and high-temperature-resistant protective film for foam materials. Background technique [0002] With the development of society and the improvement of people's needs, protective films have penetrated into all walks of life, such as instruments, meters, electronics, machinery, construction, automobile manufacturing and signage industries. The application of protective films not only improves the appearance quality of products , It facilitates material processing, improves the utilization rate of materials, and reduces the production cost of products. [0003] Foam material refers to a microporous material with numerous bubbles inside based on polymers such as plastics, rubber, elastomers, and natural polymer materials. It can also be regarded as a composite material filled with gas. Foam materials have the advantages of sound ins...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/30C09J7/25C09J175/08C09J175/06C08G18/66C08G18/48C08G18/42C08G18/32
CPCC08G18/3893C08G18/42C08G18/48C08G18/6633C08G18/6666C09J175/06C09J175/08C09J2467/006C09J7/255C09J7/30
Inventor 郑婷代申强巫柯许显成
Owner 四川羽玺新材料股份有限公司
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