Method of producing polydiorganosiloxane gum

Details Method of producing polydiorganosiloxane gum Method of producing polydiorganosiloxane gum

1987-12-07

1988-10-25

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

528 21, 528 23, 528 37, 556450, 556460, 556462, 556467, C08G 7706

Patent

active

047805196

ABSTRACT:
During the polymerization of diorganocyclosiloxane, to produce a polymer for use in manufacturing silicone rubber, a small amount of --SiOH is formed. The amount of --SiOH present in the polymer can be controlled by controlling the water vapor pressure present in the reaction container during polymerization.

REFERENCES:
patent: 2546036 (1951-03-01), Marsden
patent: 2634252 (1953-04-01), Warrick
patent: 3433765 (1969-03-01), Geipel
patent: 4122247 (1978-10-01), Evans
patent: 4439592 (1984-03-01), Maass et al.
patent: 4551515 (1985-11-01), Herberg et al.
patent: 4719276 (1988-01-01), Stebleton

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