METHOD FOR PRODUCING ONE-TERMINAL FUNCTIONAL ORGANOPOLYSILOXANE AND ONE-TERMINAL FUNCTIONAL ORGANOPOLYSILOXANE COMPOSITION

Abstract: a method for producing a one-terminal functional organopolysiloxane represented by the following general formula (1) using a cyclopolysiloxane having 3 to 5 silicon atoms as a raw material, wherein rindependently represents an alkyl or a phenyl group, and a represents a hydrogen atom or a group represented by the following general formula (2) or (3), wherein y represents a single bond or a divalent organic group, and a broken line represents an attachment, wherein r represents a hydrogen atom or a methyl group, and y and a broken line are same as above. the method including terminating a reaction at a time when a reaction conversion rate reaches 60 to 95%, the reaction conversion rate being determined using near-infrared spectrometry by analyzing a reaction liquid during the polymerization reaction.

Inventor(s): Ryota HASHIMOTO, Kaoru OKAMURA, Ken TOYODA

CPC Classification: C08G77/06 (MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS)

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