Method for producing alkoxysilalkylene terminated siloxane polym

Details Method for producing alkoxysilalkylene terminated siloxane polym Method for producing alkoxysilalkylene terminated siloxane polym

1995-07-24

1996-08-13

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

528 12, 528 23, 528 32, 528 33, 528 38, C08G 7708

Patent

active

055457045

ABSTRACT:
A method is described of producing alkoxysilalkylene enblocked polydiorganosiloxane in two steps. First, silanol terminated polydiorganosiloxane is capped with an SiH containing silazane in the presence of an acid catalyst. Then, that polymer is reacted with an alkoxy functional alkenylsilane in the presence of a hydrosilylation catalyst to give the desired polymer. The polymers are useful in formulating room temperature curing sealants.

REFERENCES:
patent: 3175993 (1965-03-01), Weyenberg
patent: 4599394 (1986-07-01), Lucas
patent: 4772675 (1988-09-01), Klosowski et al.
patent: 4847400 (1989-07-01), Krahnke et al.
patent: 4962174 (1990-10-01), Bilgrien et al.
patent: 5017672 (1991-05-01), Krahnke et al.

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