| 摘要 |
<p>A curable organopolysiloxane composition comprising: (A) a solvent-soluble organopolysiloxane obtained by conducting a hydrosilylation reaction between (i) an organopolysiloxane represented by the following average structural formula: RaSiO(4-a)/2 (wherein R1 represents a substituted or non-substituted monovalent hydrocarbon group, the content of alkenyl groups in all groups represented by R1 is within the range of 0.1 to 40 mole %, and‘a’is a positive number that satisfies the following condition: 1≰a<2), and (ii) a diorganopolysiloxane represented by the following general formula: HR22Si(R22SiO)nR22SiH (wherein R2 designates substituted or unsubstituted monovalent hydrocarbon groups that can be identical or different and that are free of unsaturated aliphatic bonds, and‘n’is an integer ranging from 0 to 1,000), the reaction being carried out in the presence of (iii) a hydrosilylation catalyst; (B) an organohydrogenpolysiloxane represented by the following average structural formula: R2bHcSiO (wherein R2 is the same as defined above, and‘b’and‘c’are positive numbers that satisfy the following conditions: 0.7≰b≰2.1; 0.001≰c≰1.0; and 0.8≰(b+c)≰2.6); and (C) a hydrosilylation catalyst; is suitable for forming a cure product having a favorable modulus of elasticity.</p> |
