Special peelable protective silicone rubber for lcm module and preparation method thereof

Abstract

The invention discloses special strippable protective silicon rubber for an LCM (liquid crystal module) and a preparation method of the special strippable protective silicon rubber. The silicon rubber is prepared from hydroxy-terminated polysiloxane, methoxy terminated polysiloxane, filler, a plasticizer, pigments, a silane coupling agent, a titanate coupling agent and a volatile solvent. The preparation method includes: 1) adding the hydroxy-terminated polysiloxane, the methoxy terminated polysiloxane, the filler and the plasticizer into a vacuum kneader to realize mixing, low-molecular-weight volatile removal and grinding; 2) transferring materials at the step 1) into a high-speed disperser, adding the pigments, and performing high-speed dispersion; 3) transferring materials at the step 2) into a planetary stirrer, adding the silane coupling agent, the titanate coupling agent and the volatile solvent, stirring, dispersing, debubbling, filtering and discharging. The special strippable protective silicon rubber for the LCM has advantages of high curing speed and storage stability, slight smell, corrosion resistance, weather resistance, easiness in stripping, high repairability, simplicity in preparation, low cost and applicability to industrial production.

Description

technical field [0001] The invention relates to a special peelable protective silicone rubber for LCM modules, in particular to a special room temperature moisture curing peelable ITO protective silicone rubber for LCM modules and a preparation method thereof. Background technique [0002] With the development of information technology, display devices are playing an increasingly important role as a key component of man-machine dialogue. The display industry has become the most eye-catching industry in our country. Anisotropic conductive film (ACF) is an indispensable key material for flexible connections in display devices. Generally, low-cost PET circuit boards are used, which can make products shorter, smaller, lighter and thinner, and are easy to use. Easy to automate. However, studies have shown that the moisture absorption capacity of ACF will change with changes in ambient temperature and humidity. When ACF is exposed to the air for a long time, due to contact with ...

AI Technical Summary

Problems solved by technology

Room temperature vulcanized silicone module protective glue is made of polysiloxane with low viscosity as a polymer. It can be vulcanized into an elastomer by contacting with moisture or mixing with a crosslinking agent at room temperature. It has excellent high and low temperature resistance. , weather resistance, ozone resistance, arc resistance, electrical insulation, chemical resistance, high gas permeability, physiological inertness and other properties, low vulcanization temperature, fast vulcanization speed, low cost, easy to operate, so it is widely used, but its stripping property is poor. Difficult to rework, not conducive to module repair or rework

Solvent-based peelable blue glue has good peelability. The peelable blue glue on the existing market mainly comes from Japan’s Hitachi Tuffy and China’s Taiwan Tianbao. It is expensive and contains volatile solvents, which will affect the performance of the scraper, the working environment, The length of curing time will affect the substrate on the touch screen function block, and the organic solvent will also endanger human health.

Images