Silicone rubber (English name: Silicone rubber), divided into thermal vulcanization type (high temperature vulcanization silica gel HTV), room temperature vulcanization type (RTV), of which the room temperature vulcanization type is divided into condensation 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 adhesive, potting material or mold. The thermal vulcanization type has the largest amount, and the thermal vulcanization type is divided into methyl silicone rubber (MQ), methyl vinyl silicone rubber (VMQ, with the largest amount and product brand), methyl vinyl phenyl silicone rubber (PVMQ low temperature resistance, radiation resistance) , Others include eye silicone rubber, fluorosilicone rubber, etc.

Silicone resin, scientific name polysiloxane resin (English name: Silicone resin) is a polyorganosiloxane with a highly cross-linked network structure. It has the dual characteristics of organic resin and inorganic material. Silicone resin has unique physical and chemical properties. Classification of silicone resin Silicone resin is a cross-linked semi-inorganic high polymer with a silicon-oxygen-silicon main chain and an organic group connected to the silicon atom. It has outstanding weather resistance with the direct production of silicone monomer silicone resin, which is beyond the reach of any organic resin. Even under strong ultraviolet radiation, silicone resin is resistant to yellowing. Silicone resin adhesives and silicone adhesives can be divided into silicone resin-based adhesives and silicone rubber-based adhesives according to the source of raw materials. The former is mainly used for bonding metals and heat resistance. Such metals have good bonding performance, and are easy to bond to glass and ceramics, but have poor adhesion to copper. Silicone adhesive based on pure silicone resin.

Features:
Silicone rubber has excellent heat resistance, cold resistance, dielectric properties, ozone resistance and atmospheric aging resistance. ℃ (or higher temperature) for long-term use. However, the mechanical properties such as tensile strength and tear strength of silicone rubber are poor, and its physical and mechanical properties are not as good as most synthetic rubbers at room temperature. Besides nitrile silicon and fluorosilicone rubber, general silicone rubber has oil and solvent resistance properties It is not good, so silicone rubber is not suitable for ordinary conditions, but it is very suitable for many specific occasions.

Silicone resin is mainly used as: insulating paint (including varnish, enamel, paint, impregnating paint, etc.) to impregnate H-class motor and transformer coils, and to impregnate glass cloth, glass cloth and asbestos cloth to make motor bushings, electrical appliances Insulated windings, etc. The large-area mica sheet insulating material can be obtained by bonding mica with silicone insulating paint, which is used as the main insulation of high-voltage motors.

In addition, silicone resin can also be used as heat-resistant and weather-resistant anti-corrosion coatings, metal protective coatings, construction waterproof and moisture-proof coatings, mold release agents, adhesives and secondary processing into silicone plastics for electronic, electrical and defense industries In the past, as semiconductor packaging materials and electronic and electrical silicone resins, it can be roughly divided into several categories such as silicone insulating paints, silicone coatings, silicone plastics and silicone adhesives according to their main uses and cross-linking methods. Silicone resins can include small molecular organosilicon compounds, which do not have to be large in molecular weight. The silicone rubber must be a polyorganosilane with a certain molecular weight and a rubbery state.

Silicone resin coatings have many disadvantages: poor film-forming properties, including high curing temperature, long time, inconvenient construction in large areas, and poor adhesion of the coating film to the bottom layer. Modification with fluorination is mainly to increase the solvent resistance, oil repellency (anti-tack) and reduce the surface energy of the silicone resin. The critical surface tension of silicone resins is lower than that of other resins, but higher than that of fluororesins.