1. Definition of vulcanized silicone rubber:

Vulcanized silicone rubber is a new type of silicone elastomer, used to manufacture dealcohol type, deacetate type, deketoxime type one-component, two-component sealant, etc. It has very good mold release properties, especially It is suitable for manufacturing precision molds; it can also be used as an insulating material for electronic potting. The most significant feature of this kind of rubber is that it can be cured on the spot without heating and pressing at room temperature, and it is extremely convenient to use. Become an important part of the entire silicone products.　

2. Features:

Vulcanized silicone rubber can protect against moisture, corrosion and shock. Can improve the performance and stability of silicone rubber. Room temperature vulcanized silicone rubber has excellent anti-sticking performance after vulcanization, and the shrinkage rate during vulcanization is very small. Vulcanized silicone rubber is particularly suitable for deep potting materials and has a faster vulcanization time.

3. Application:

Vulcanized silicone rubber is widely used as potting and molding materials. After various electronic and electrical components are coated and potted with room temperature vulcanized silicone rubber, they are widely used for sealing in the automobile and machinery industries, shock-resistant materials, rubber roller materials in the textile, plastic, and printing industries, and caulking and sealing materials in the construction industry. . At the same time, it can be used to make soft molds and molds for casting epoxy resin, polyester resin, polystyrene, polyurethane, vinyl plastic, paraffin wax, low melting point alloy, etc. In addition, the high simulation performance of two-component room temperature vulcanized silicone rubber can replicate various exquisite patterns on cultural relics.


Silicone rubber refers to a rubber whose main chain consists of alternating silicon and oxygen atoms, and two organic groups are usually attached to the silicon atoms. Ordinary silicone rubber is mainly composed of siloxane chain links containing methyl groups and a small amount of vinyl groups. The introduction of phenyl groups can improve the high and low temperature resistance of silicone rubber, while the introduction of trifluoropropyl and cyano groups can improve the temperature and oil resistance of silicone rubber. Silicone rubber has good low-temperature resistance and can generally work at -55°C. After the introduction of phenyl, it can reach -73°C. Silicone rubber also has outstanding heat resistance. It can work for a long time at 180°C, and can withstand a few weeks or longer when it is slightly higher than 200°C. It can still withstand high temperatures above 300°C in an instant. Silicone rubber has good air permeability, and its oxygen transmission rate is the highest among synthetic polymers. In addition, silicone rubber also has outstanding characteristics of physiological inertness and does not cause blood clotting, so it is widely used in the medical field.

Silicone rubber is divided into thermal vulcanization type (high temperature vulcanized silica gel HTV) and room temperature vulcanization type (RTV), among which room temperature vulcanization type is divided into condensation polymerization reaction type and addition reaction type. High temperature silicone rubber is mainly used to manufacture various silicone rubber products, while room temperature silicone rubber is mainly used as an adhesive, potting material or mold. The hot vulcanization type has the largest amount, and the hot vulcanization type is divided into methyl silicone rubber (MQ), methyl vinyl silicone rubber (VMQ, the amount and product brand are the most), and methyl vinyl phenyl silicone rubber PVMQ (low temperature resistance, radiation resistance ), there are other silicone rubber, fluorosilicone rubber and so on.

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