| 摘要 |
<p>There is provided a curable composition comprising: (A) an organopolysiloxane block copolymer comprising: (i) at least one siloxane block consisting essentially of from about 6 to about 120 units of the formula R2SiO, (ii) at least one siloxane block consisting essentially of from about 3 to about 160 units of the formula R1SiO1.5, (iii) optionally, at least one siloxane block consisting essentially of from 1 to about 80 units of the formula R2SiO1.5, and (iv) at least one siloxane block consisting essentially of from about 0.1 to about 10 mole percent of the sum of (i), (ii) and (iii) of units of the formula RR3SiO, where R is a C1-5 substituted or unsubstituted alkyl radical or a C6-10 substituted or unsubstituted aryl or alkaryl radical, R1 is a C6-10 substituted or unsubstituted aryl or alkaryl radical, R2 is a C1-5 substituted or unsubstituted alkyl radical and R3 is a C2-5 alkenyl radical; (B) an organohydrogenpolysiloxane, and (C) a catalyst.</p> |
