What product is silicone resin and what are its uses

Silicone resin is a highly cross-linked polyorganosiloxane with a network structure, usually methyltrichlorosilane, dimethyldichlorosilane, phenyltrichlorosilane, diphenyldichlorosilane or


Various mixtures of methylphenyldichlorosilane, in the presence of organic solvents such as toluene, are hydrolyzed at a relatively low temperature to obtain acid hydrolysates. The initial product of hydrolysis is a mixture of cyclic, linear and cross-linked polymers.


It usually contains quite a lot of hydroxyl groups. The hydrolyzate is washed with water to remove the acid, and the neutral primary polycondensate is thermally oxidized in the air or further polycondensed in the presence of a catalyst, and finally forms a highly cross-linked three-dimensional network structure


Silicone resin paint


In view of the above characteristics, silicone resin is mainly used as insulating paint (including varnish, enamel, colored paint, impregnating paint, etc.) to impregnate class H motors and transformer coils, and to impregnate glass cloth, glass cloth silk and asbestos cloth to make motor covers Tubes, electrical insulation windings, etc. Using organic silicon insulating varnish to bond mica can make a large area of mica sheet insulating material, which can be used as the main insulation of high-voltage motors. In addition, silicone resin can also be used as heat-resistant, weather-resistant anti-corrosion coatings, metal protective coatings, waterproof and moisture-proof coatings for construction projects, release agents, adhesives, and secondary processing into silicone plastics for use in electronics, electrical and defense industries Above, as semiconductor packaging materials and insulating materials for electronic and electrical parts.


There are roughly three ways to cure and crosslink silicone resins: one is to use the hydroxyl groups on the silicon atoms to shrink and polymerize and crosslink to form a network structure, which is the main way to cure silicone resins, and the other is to use the ethylene connected to the silicon atoms. Base, using organic peroxide as a catalyst, similar to the way of silicone rubber vulcanization: the third is to use the vinyl and silicon-hydrogen bond connected to the silicon atom to carry out the addition reaction, for example, solvent-free silicone resin and foaming agent can be mixed Get foamed silicone resin. Therefore, silicone resins can be roughly divided into silicone insulating varnishes, silicone coatings, silicone plastics and silicone adhesives according to their main uses and cross-linking methods.