The composition of claim 1, where Component (B) comprises at least one unit of the general formula R4 aR5 bSiO4-a-b/2 wherein R4 is an alkyl or aryl group having from 1 to about 8 carbon atoms, a has a value of 0 or 1, b has a value of from 2 to 3, the sum of a+b being no more than 3, and R5 is selected from the group consisting of a hydrogen atom, a hydroxyl and an alkoxy group.