Method for the preparation of organopolysiloxane

Details Method for the preparation of organopolysiloxane Method for the preparation of organopolysiloxane

1992-05-28

1992-12-29

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

C07F 708

Patent

active

051753286

ABSTRACT:
There is disclosed a novel method for the preparation of an organopolysiloxane which has two or three diorganohydrogensiloxy groups at one and only one end of the molecular chain terminal. The method of the invention is particularly useful in that it produces high yields of the desired organopolysiloxane. The method comprises causing a condensation reaction between (A) a hydrogen or lithium terminated polysiloxane and (B) an organopolysiloxane having two or three diorganohydrogensiloxy groups at one terminal of the molecular chain and a halogen at the other terminal of the molecular chain.

REFERENCES:
patent: 2811506 (1957-10-01), Coustan
patent: 3249585 (1966-05-01), Stark et al.
patent: 3576029 (1971-04-01), Haluska
patent: 4816541 (1989-03-01), Koerner et al.
patent: 5041591 (1991-08-01), Okawa
patent: 5097054 (1992-03-01), Yamamoto et al.

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