Method for the preparation of diorganopolysiloxanes

Details Method for the preparation of diorganopolysiloxanes Method for the preparation of diorganopolysiloxanes

1994-04-25

1995-03-21

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

528 18, 528 33, 528 34, 528 37, 556453, C08G 7708

Patent

active

053996496

ABSTRACT:
A method for the high-purity synthesis of a diorganopolysiloxane having a functional group at only one molecular chain terminal, that is characterized by the preliminary silylation with a silylating agent of the silanol group-containing impurity present in the cyclic trisiloxane, and that is characterized by preliminarily converting the silanol group-containing impurity in the cyclic trisiloxane into a lithiated material by lithiation with an organolithium compound and then silylating this lithiated material using a silylating agent that contains silicon-bonded halogen.

REFERENCES:
patent: 4876373 (1989-10-01), Okawa et al.
patent: 5045621 (1991-09-01), Suzuki

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