Synthesis and Properties of Adhesion Promoter Used in LED Packaging Silicone Rubber

Taking hydroxyvinyl silicone oil, γ-(2,3-epoxypropoxy) propyltrimethoxysilane (KH-560), γ-methacryloxypropyl trimethoxysilane (KH-570) as raw materials, silicone adhesion promoters containing epoxy, acryloyloxy and vinyl groups were synthesized by condensation reaction. The blank LED packaging silicone rubber were prepared by vinyl silicone oil and hydrogen silicone oil, the properties were studied by adding different kinds of adhesion promoters. The experiments demonstrated that the silicone adhesion promoter synthesized by KH560 and KH570 with the molar ratio of 9∶1 has the best adhesion performance when its containing ratio in the LED packaging silicone rubber is 2%. And the adhesion performance of the LED iron bracket is superior to that of the LED copper bracket.