Antistatic polyurethane protective film and preparation method thereof

A polyurethane, protective film technology, applied in the direction of polyurea/polyurethane adhesive, pressure-sensitive film/sheet, film/sheet adhesive, etc., can solve the problem of low viscosity, high exhaust and no white fog. , Affect the performance of PU pressure-sensitive adhesives, the exhaust performance is not ideal, etc., to achieve good self-exhaust performance, lasting antistatic effect, and good adhesion performance.

Active Publication Date: 2021-09-10
XIANGYANG SUNVALOR AEROSPACE FILMS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polyurethane modified high-temperature resistant pressure-sensitive adhesive disclosed above and its preparation method have high peeling force and unsatisfactory air release, which seriously affects the performance of the PU pressure-sensitive adhesive, and cannot achieve low viscosity and high air release. The performance of white fog makes it difficult to widely promote

Method used

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  • Antistatic polyurethane protective film and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] S1, the preparation of polyurethane pressure-sensitive adhesive: According to the mass ratio, polyurethane resin slurry PU-1 (viscosity 12000, weight average molecular weight 90000, solid content 66%), 100 parts, EA: 150 parts, TDI: 6 parts, triethylene Sodium diamine-2-ethylhexanoate (TEDA-EH) delayed catalyst: 0.02 parts; tributylmethylammonium bis(trifluoromethanesulfonyl)imide salt antistatic agent: 0.5 parts. Under normal temperature conditions, add the formula amount of polyurethane resin slurry and dissolving agent into a clean stainless steel bucket, turn on the high-speed mixer, and fully stir the material in the stainless steel bucket at a speed of 400rpm for 5 minutes, and then add the formula amount of curing agent in sequence , antistatic agent, delayed catalyst, mix evenly according to the above formula amount and adding order, each time a substance is added, mix at 400rpm for 5 minutes to ensure the accuracy of the formula and the uniformity of mixing.

[0...

Embodiment 2

[0040] S1, the preparation of polyurethane pressure-sensitive adhesive: According to the mass ratio, polyurethane resin slurry PU-1 (viscosity 12000, weight average molecular weight 90000, solid content 66%), 100 parts, EA: 250 parts, TDI: 7 parts, triethylene Diamine-o-dicyano-sodium diacetate (TEDA-DCN-Ac) delayed catalyst: 0.023 parts; 2-(11-methyldodecyloxy) ethanol phosphate antistatic agent: 0.7 parts. Under normal temperature conditions, add the formula amount of polyurethane resin slurry and dissolving agent into a clean stainless steel bucket, turn on the high-speed mixer, and fully stir the material in the stainless steel bucket at a speed of 300rpm for 8 minutes, and then add the formula amount of curing agent in sequence , antistatic agent, delayed catalyst, mix evenly according to the above formula amount and adding order, each time a substance is added, mix at 300rpm for 8 minutes to ensure the accuracy of the formula and the uniformity of mixing.

[0041] S2, pr...

Embodiment 3

[0043] S1, the preparation of polyurethane pressure-sensitive adhesive: According to the mass ratio, polyurethane resin slurry PU-2 (viscosity 5000, weight average molecular weight 80000, solid content 70%), 100 parts, EA: 90 parts, TDI: 10 parts, triethylene Diamine-o-dicyano-sodium dinitrate (TEDA-DCN-NIT) delayed catalyst: 0.05; tributylmethylammonium bis(trifluoromethanesulfonyl)imide antistatic agent: 0.7 parts. Under normal temperature conditions, add the formula amount of polyurethane resin slurry and dissolving agent into a clean stainless steel bucket, turn on the high-speed mixer, and fully stir the material in the stainless steel bucket at a speed of 200rpm for 10 minutes, and then add the formula amount of curing agent in sequence , antistatic agent, delayed catalyst, mix evenly according to the above formula amount and adding order, and mix at 200rpm for 10 minutes for each substance added to ensure the accuracy of the formula and the uniformity of mixing.

[0044...

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Abstract

The invention relates to an antistatic polyurethane pressure-sensitive adhesive protective film and a preparation method thereof. The antistatic polyurethane pressure-sensitive adhesive protective film is prepared by uniformly coating a polyurethane pressure-sensitive adhesive on a plastic film substrate and baking at high temperature, wherein the polyurethane pressure-sensitive adhesive is prepared from the following components in parts by mass: 100 parts of polyurethane resin slurry, 50-300 parts of a dissolving agent, 3-15 parts of a curing agent, 0.02-1.2 parts of a delay catalyst and 0.1-1.5 parts of an antistatic agent; the delay catalyst is a thermal activation type amine delay catalyst; and the antistatic agent is an ionic liquid antistatic agent. According to the antistatic protective film, the silicon transfer phenomenon of an organic silicon pressure-sensitive adhesive is avoided, the antistatic protective film also has stripping force stability and aging resistance superior to those of an acrylate pressure-sensitive adhesive, meanwhile, the antistatic protective film has a stable and excellent antistatic effect, and the protective film has good self-exhaust performance, good adhesion performance, soft and residue-free torn film, stable stripping force and excellent aging performance. The preparation method disclosed by the invention is simple in process and easy for industrial production and control.

Description

technical field [0001] The invention relates to the field of pressure-sensitive adhesive protective films, in particular to an antistatic polyurethane pressure-sensitive adhesive protective film and a preparation method thereof. Background technique [0002] Glass cover plates of electronic products, precision molded parts, and precision electronic components need to be covered with protective films during the manufacturing process or transportation to protect the surface from contamination and damage. Cleanliness, at the same time, in order to avoid damage to component products due to electrostatic breakdown caused by tearing the film, the protective film is also required to have an antistatic function; when protecting the screen, the protective film is also required to have excellent wetting and self-exhausting functions. [0003] At present, there are three main types of pressure-sensitive adhesives used in PET protective films on the market: acrylate type, silicone type ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/38C09J7/25C09J7/24C09J175/04C09J11/06
CPCC09J7/38C09J7/25C09J7/243C09J175/04C09J11/06C09J2475/00C09J2467/006C09J2423/046C08K2201/017C08K5/0075
Inventor 李莹李俊彬高明华武鹏张鹏周志豪彭德勇冯强辉尹鹏
Owner XIANGYANG SUNVALOR AEROSPACE FILMS CO LTD
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