Preparation of polyorganosiloxanes by interfacial polymerization

Details Preparation of polyorganosiloxanes by interfacial polymerization Preparation of polyorganosiloxanes by interfacial polymerization

1996-04-01

1997-06-10

Dean, Ralph H.

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

Synthetic resins

From silicon reactant having at least one...

528 14, 528 34, C08G 7706

Patent

active

056376685

ABSTRACT:
A process for manufacturing high molecular weight polysiloxane copolymers by interfacial polymerization. The polysiloxanes may contain phenylmethyl siloxane blocks and dimethyl siloxane blocks, alternately polymerized together to form an (A.sub.m B.sub.n).sub.x type copolymer. The interfacial polymerization process is fast, proceeds smoothly at room temperature, and is not reversible, i.e., no cyclic siloxane species are generated. The polysiloxanes can be formed as thermoplastic elastomers suitable for use as sealants, fillers, and films.

REFERENCES:
patent: 3641090 (1972-02-01), Bostick
patent: 4493714 (1985-01-01), Ueda
patent: 4518547 (1985-05-01), Cuff
patent: 4604442 (1986-08-01), Rich

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