MQ silicone resins come in a number of different types due to the organic group R on the shell:
When R is all methyl, it is called methyl MQ silicone or simply MQ silicone; When part R is H, it is called methyl hydrogen MQ silicone resin; There are methyl phenyl MQ silicone, vinyl MQ silicone tree, phenyl MQ silicone, fluoride MQ silicone, MDQ, MTQ silicone and so on. The performance of MQ silicone resin and its application scope mainly depends on its synthesis process conditions and the type and number of organic groups in the molecule, that is, the number ratio of M chain and Q chain; Among them, the organic group R mainly increases the compatibility with other components and plays a viscosifying role, while the SiO4/2 chain link mainly improves the strength of the composite and plays a reinforcing role.
Silicone adhesive is divided into silicone resin based adhesive and room temperature vulcanized silicone rubber based adhesive, the former is mainly used for bonding metal and heat resistant non-metallic materials, the adhesive can be used in the temperature range of -60-120℃; The latter is mainly used for gluing heat-resistant rubber, gluing rubber with metal and gluing other non-metallic materials.
Silicone resin is silicon - oxygen - silicon as the main chain, silicon atoms connected to the organic group of crosslinked semi-inorganic polymer, it is made of multifunctional silicone hydrolyzed polycondensation, under the action of heating or catalyst can be further transformed into a three-dimensional structure of the insoluble inmelt thermosetting resin. Silicone resin can be divided into methyl silicone resin, phenyl silicone resin, methyl phenyl silicone resin and so on according to the different connecting groups on the silicon atom.