Patent ID: 6869541

Claim:
An epoxy resin composition comprising: an epoxy resin having one or more water repellent groups and two or more cyclic aliphatic epoxy groups per molecule; a triazine-base catalyst for cationic polymerization; and a non-polar solvent, wherein the epoxy resin has the following general formula (1): wherein R 1 , R 4 and R 5 are independently selected from a hydrogen atom and an alkyl group with 1 to 3 carbons; R 2 and R 3 are independently selected from a methyl group and a phenyl group; x is 2 to 100; n 1 is an integer of 1 to 3; n 2 is an integer of 1 to 5; Rf is a fluoroalkyl group; a is 1 to 50; b is 2 to 100; c is 1 to 50; and d is 1 to 50, the number average molecular weight being 8,000 to 22,000.