Types and classification of liquid silicone rubber
Liquid silicone rubber is divided into two types: single-component and two-component (multi-component) according to the packaging form of the product; according to its cross-linking vulcanization mechanism, it can be divided into two systems: condensation type and addition type. It can be divided into two types of liquid silicone rubber: condensation type (room temperature moisture vulcanization) and addition type (heat vulcanization); the two-component can also be subdivided into two types: condensation type (room temperature moisture vulcanization) and addition type (room temperature or heat vulcanization). A liquid silicone rubber.
There are three main types of liquid silicone rubber:
1. Condensed one-component room temperature vulcanization (RTV) liquid silicone rubber
Condensed one-component room temperature vulcanizing (RTV) silicone is a kind of liquid silicone rubber, which is made of a, W-dihydroxypolydimethylsiloxane (viscosity 3000~100000mPa.S) as the base polymer (commonly known as base rubber) After being uniformly warmed with cross-linking agent, catalyst, filler and other characteristic additives in a moisture-proof thermostat, it is packaged in a sealed cylinder or hose; it is extruded from the package during use and exposed to moisture in the air. Gas cross-linking vulcanization.
The type of crosslinking system of condensation type one-component RTV silicone rubber: deacetic acid type, deketoxime type, dealcoholization type, acetone removal type, deamidation type.
Condensed two-component RTV liquid silicone rubber
Condensed two-component room temperature vulcanizing (RTV) silica gel is a kind of liquid silicone replacement rubber. It is composed of a, w-polydimethylsiloxane (viscosity 3000~100000mPa.S) and fillers and other characteristic additives. It is a type of silicone material that is made into a base material, made into a vulcanizing agent by crosslinking agent, catalyst and other additives, packaged separately, and mixed in proportion when used.
Condensation type two-component RTV silica gel type: ① dealcoholization type: soft mold material, perfusion material, high and medium modulus building sealing ring: ② degassing type: anti-vibration, buffer material, perfusion material, gastric perforation filling material; 3 dehydrogenated amine type: low modulus building sealant.
Addition liquid silicone rubber
Addition-type liquid silicone rubber is made of polyorganosiloxane containing vinyl as the base polymer, and polyorganosiloxane containing Si-H bonds as the crosslinking agent. In the presence of a platinum catalyst, it can be cross-linked at room temperature or under heating. A class of organosilicon materials of disulfide
Addition type liquid silicone rubber type: ① Two-component: potting material, coating material, soft mold material, optical fiber coating material, fabric coating material, liquid injection molding material, gel perfusion material, foam, spherical micropowder. ②Single component: potting material, FIGP sealant, coating material.


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