Stereoregular poly(methyl(3,3,3-trifluoropropyl)-siloxane) polym

Details Stereoregular poly(methyl(3,3,3-trifluoropropyl)-siloxane) polym Stereoregular poly(methyl(3,3,3-trifluoropropyl)-siloxane) polym

1994-02-03

1995-03-28

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

528 14, 528 37, 528 42, C08G 7708

Patent

active

054018226

ABSTRACT:
The present invention is stereoregular poly{methyl(3,3,3-trifluoropropyl)siloxane} polymers and copolymers and methods for their making. The process involves reacting isomers of 1,3,5-trimethyl-1,3,5-tris(3',3',3'-trifluoropropyl)cyclotrisiloxane in the presence of an aprotic polar promoter and a lithium compound. The lithium compound initiates ring opening and polymerization of the isomers without effecting the steric arrangement of the isomers. Elastomers prepared by cross-linking polymers of the present invention can have sufficient cis 3,3,3-trifluoropropyl substitution to allow the elastomers to strain crystallize and provide reinforcement to the elastomers at typical use temperatures.

REFERENCES:
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patent: 3575921 (1971-04-01), Lee
patent: 4814418 (1989-03-01), Miyake et al.
patent: 5300609 (1994-04-01), Kobayashi
Curtis et al., Polym. Preprin., Div. Polym. Chem., Am. Chem. Soc., 25 (1984) 1.
Momper et al., Polym. Commun. 31 (1990) 186.
Rubber Chemistry and Technology, Rubber Reviews for 1979, vol. 52 (No. 3) pp. 447-454.

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