Patent ID: 7378484
Filing Date: 2008-05-27
Classification: C08G

Abstract:
1. A phenolic resin which has an increased toughness due to including therein a polydimethylsiloxane, and which is a hydrolysis condensation product of a first precursor, a second precursor and tetraethoxysilane, wherein the first precursor includes a phenolic resin and γ-glycidoxypropyltrimethoxysilane in which hydroxyl groups of the phenolic resin are grafted onto an epoxy group of the γ-glycidoxypropyltrimethoxysilane, and wherein the second precursor includes a coupling agent and an hydroxyl-terminated polydimethylsiloxane in which hydroxyl groups of the polydimethylsiloxane are grafted at a first terminal of the coupling agent and a second terminal of the coupling agent has a branched siloxane structure.