Patent ID: 7138467

Claim:
A curable resin composition comprising: (I) crystalline epoxy resin, (II) a silicone resin with a softening point exceeding 25° C., represented by the average unit formula (R 1 SiO 3/2 ) a (R 2 2 SiO 2/2 ) b (R 3 3 SiO 1/2 ) c (SiO 4/2 ) d (XO 1/2 ) e , wherein R 1 , R 2 , and (R 3 are independently selected from the group consisting of monovalent hydrocarbon groups and epoxy-containing organic groups such that, of the total number of R 1 , R 2 , and R 3 groups in the molecule. 0.1 to 40 mol% comprises epoxy-containing organic groups and not less than 10 mol% comprises phenyl groups, X is selected from the group consisting of a hydrogen atom and alkyl group, a is a positive number, b is 0 or a positive number, c is 0 or a positive number, d is 0 or a positive number, and e is 0 or a positive number such that b/a is a number from 0 to 10, c/a is a number from 0 to 0.5, d/(a+b+c+d) is a number from 0 to 0.3, and e/(a+b+c+d) is a number from 0 to 0.4, and (III) a silicone resin that is liquid at 25° C.