Solid-liquid phase interfacial polymerization

Details Solid-liquid phase interfacial polymerization Solid-liquid phase interfacial polymerization

1998-12-01

2000-04-04

Dawson, Robert

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

Synthetic resins

From silicon reactant having at least one...

528 32, 528 33, 528 34, 528 38, 528 43, C08G 7706

Patent

active

060462930

ABSTRACT:
A process for manufacturing high molecular weight, alternating polysiloxane copolymers, by solid-liquid phase, nonaqueous, interfacial polymerization. The copolymers consist of alternating siloxane repeating units of the (AB).sub.m type, such as diphenylsiloxane units and dimethylsiloxane units, alternately polymerized together to form the copolymer. The solid-liquid phase interfacial polymerization process is fast, proceeds smoothly at room temperature, and is not reversible, i.e., no cyclic siloxane species are generated. The resulting polysiloxanes can be formed into thermoplastic elastomers which are suitable for use as sealants, fillers, and films.

REFERENCES:
patent: 3481965 (1969-12-01), Selin
patent: 5169920 (1992-12-01), Okawa
patent: 5629401 (1997-05-01), Graiver
patent: 5637668 (1997-06-01), Graiver
patent: 5969173 (1999-10-01), Clarke et al.

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