ADDITION-TYPE ORGANOSILICON SEALANT FOR HALOGEN-FREE CONDUCTIVE AND FLAME-RESISTANT ELECTRIC PRODUCTS

摘要

This invention refers to an addition-type organosilicon sealant for halogen-free conductive and flame-resistant electric products, which consists of: A) vinyl silicone oil; B) silicon dioxide treated by silane or aluminium oxide treated by silane; C) a compound in which every molecule contains H—Si functional group, the mass content of H is 0.1-1.2%; D) hydrolysis product from hydrolysis reaction between Vinyl trimethoxy (triethoxy) silane and γ-(2,3-epoxy propoxy) propyl trimethoxy (triethoxy) silane; E) chloroplatinic acid or 1,3-divinyl-1,1,3,3-tetramethyl disiloxane platinum complex; F) any one or combination of carbon black, iron black, titanium dioxide, cerium oxide, benzotriazole, zinc carbonate and magnesium carbonate. The substance provided by this invention, which is halogen-free and flame-resistant with certain heat conductivity and viscosity, is quite applicable to sealing of electric products.

主权项

1. An addition-type organosilicon sealant for halogen-free conductive and flame-resistant electric products, featured by: the said sealant consists of:
A) 100 parts (by weight) of vinyl silicone oil; B) 10-500 parts (by weight) of silicon dioxide treated by silane or aluminium oxide treated by silane; C) A compound in which every molecule contains H—Si functional group, the mass content of H is 0.1-1.2%; the molar ratio of H—Si and vinyl in the compound is 0.6-3; D) Hydrolysis product from hydrolysis reaction between Vinyl trimethoxy (triethoxy) silane and γ-(2,3-epoxy propoxy) propyl trimethoxy (triethoxy) silane, or the reactant of the said hydrolysis product and γ-aminopropyl trimethoxy (triethoxy) silane; the dosage is 0.1-5 parts (by weight); E) Chloroplatinic acid or 1,3-divinyl-1,1,3,3-tetramethyl disiloxane platinum complex, the dosage is 2-200 PPm of the whole sealant composition; F) Any one or combination of carbon black, iron black, titanium dioxide, cerium oxide, benzotriazole, zinc carbonate, magnesium carbonate; the dosage is 0.01-50 parts (by weight);