Electrical components and method for the fabrication thereof

摘要

This invention relates to a primer that improves adherence of a cured resin sealant to a cured silicone coating on an electrical element, wherein said primer is selected from: (i) a mixture of components (A) and (B), (ii) a reaction mixture of components (A) and (B), (iii) component (C), (iv) component (C) and a mixture of components (A) and (B), and (v) component (C) and a reaction mixture of components (A) and (B), where component (A) is silanol-functional organopolysiloxane; component (B) is an epoxy-functional organoalkoxysilane: and component (C) is an organopolysiloxane with the average unit formula: (R<1>SiO3/2)a(R<2> 2SiO2/2)b(R<2> 3SiO1/2)c(R<3>O1/2)d where R<1> is an epoxy-functional monovalent organic group; each R<2> is independently a monovalent hydrocarbon group, R<3> is selected from hydrogen and alkyl groups of 1 to 4 carbon atoms; a, b and d are each a positive number; and c is 0 or a positive number.