| abstract |
Novel organopolysiloxanes having one silanol group within a molecule and the method for manufacturing them at high purity and high yield. The organopolysiloxanes having a silanol group are expressed by the formula (1) below:n n wherein R¹ s a monovalent organic group with 1 to 8 carbon atoms, each of R², R³ and R⁴ is a monovalent organic group with 1 to 8 carbon atoms or a siloxyl group expressed by -OSiR⁵R⁶R⁷ wherein R⁵, R⁶, and R⁷ are independently substituted or unsubstituted monovalent hydrocarbon groups with 1 to 8 carbon atoms, Y is a hydrogen atom, a halogen atom, or a monovalent organic group of 1 to 12 carbon atoms, n is an integer of from 0 to 12, and a is either 0 or 1, with the proviso that the grouping Y-(CH₂) n -Si is not H-Si, CH₃-Si or a hydrolyzable silyl group. |