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Process for preparing low-viscosity and high-temperature-resistance protective film

A technology of high temperature resistant protective film and preparation process, applied in the direction of adhesives, adhesive types, polyurea/polyurethane adhesives, etc. , Easy to tear off, good fit effect

Active Publication Date: 2019-12-20
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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  • Process for preparing low-viscosity and high-temperature-resistance protective film
  • Process for preparing low-viscosity and high-temperature-resistance protective film
  • Process for preparing low-viscosity and high-temperature-resistance protective film

Examples

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 process for preparing a low-viscosity and high-temperature-resistance protective film. The process for preparing the low-viscosity and high-temperature-resistance protectivefilm comprises the following steps that S1, a PET thin-film is prepared; S2, adhesive liquid is prepared, specifically, S21, silicon-containing diphenol is prepared; S22, a catalyst is prepared; S23,macromolecular polyol is subjected to vacuum dewatering at 100-120 DEG C for 1-5 h and then cooled to 60 DEG C-80 DEG C; then organic solvent acetone and the silicon-containing diphenol are added, themixture is stirred and mixed well, isocyanate and the catalyst are added, and the mixture is stirred at a constant temperature for reaction for 5-6h; and the mixture is cooled to 30 DEG C-50 DEG C, an emulsifier and deionized water are finally added, high-speed shearing and dispersing is carried out for 2h to obtain the low-viscosity and high-temperature-resistance adhesive liquid; and S3, the PET thin-film subjected to corona treatment is coated with the adhesive liquid, the PET thin-film is dried in an oven at 100 DEG C-110 DEG C, and then cooled, and a protective layer is attached to the side coated with the adhesive liquid to obtain the PET protective film. The PET protective film prepared by the process for preparing the low-viscosity and high-temperature-resistance protective film has excellent properties such as high temperature resistance, low viscosity, easy tearing, no adhesive residue, and good adhesion, and is particularly suitable for foamed 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 Applications(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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