Straight-chain organopolysiloxane and process of producing the same.

摘要

A straight-chain organopolysiloxane represented by the following general formula : <CHEM> wherein R and R<1> each represent a monovalent hydrocarbon group, X represents a hydrogen atom or a triorganosilyl group, and n is an integer of 15 to 4,000 and containing cyclic polysiloxanes having molecular weights of 3,000 or less in an amount of 50 ppm or less. This straight-chain organopolysiloxane is novel in that the straight-chain organopolysiloxane contains the cyclic polysiloxanes having molecular weights of 3,000 or less only in an amount of 50 ppm or less. Where the straight-chain organopolysiloxane is used as an electric/electronic material, a building material, and the like, a contact failure due to volatilization of low molecular weight components, soiling to surroundings due to bleeding, and the like can be avoided.