| 摘要 |
PURPOSE:To obtain a composition for inner coat, free from volatilizing a low- boiling point compound when heat-cured and having excellent adhesion by blending a specific vinyl group-containing polysiloxane with a specific polysiloxane and modified organopolysiloxane together with a platinum based catalyst. CONSTITUTION:100 pts.wt. vinyl group-containing polysiloxane expressed by formula I [V is vinyl; Me is methyl; ph is phenyl; R is methyl or phenyl; k and l are natural numbers and expressed by the formula 0.01<=l/(k+l)<=0.2] and having 100-800cp viscosity at 25 deg.C is blended with 1-35 pts. wt. polysiloxane expressed by formula II [m and n are natural numbers and expressed by the formula 5<=n/(m+n)<=0.3] and having 2-500cp viscosity at 25 deg.C, 0.1-20wt.% (based on the sum of the above-mentioned two components) modified organopolysiloxane having H bonded to silicone and group expressed by the formula (R1O)3SiCH2CH2R2(OCH2CH2)p (R2 is methyl, etc.; p is <=3) in one molecule and platinum based addition reaction catalyst. |
