| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a curable silicone resin composition giving a transparent cured material having excellent hardness and flexural strength. <P>SOLUTION: This curable silicone resin composition contains (A) a hydrocarbon compound containing an aromatic ring and having two or more hydrogen atoms bonded to silicon atom in one molecule wherein the silicon atom is bonded to the hydrocarbon skeleton, (B) an organopolysiloxane expressed by the formula (1) R<SP>1</SP><SB>x</SB>SiO<SB>ä(4-x)/2}</SB>(R<SP>1</SP>groups are each independently a substituted or unsubstituted univalent hydrocarbon group, a substituted or unsubstituted hydrocarbyloxy group or hydroxy group; 0.1-80 mol% of the total R<SP>1</SP>groups is alkenyl group; and (x) is a positive number satisfying 1≤x<2), having a viscosity of ≥1,000 mPas at 25°C and having a branched or three-dimensional network structure, and (C) a catalyst for hydrosilylation reaction. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
