Synthesis of dihydroxy-terminated poly(2,2,3,3,4,4-hexafluoropen

Details Synthesis of dihydroxy-terminated poly(2,2,3,3,4,4-hexafluoropen Synthesis of dihydroxy-terminated poly(2,2,3,3,4,4-hexafluoropen

1987-05-05

1988-04-26

Phynes, Lucille M.

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

Synthetic resins

From aldehyde or derivative thereof as reactant

528244, 528401, C08G 1002, C08G 7324

Patent

active

047405791

ABSTRACT:
A method of producing dihydroxy-terminated poly(2,2,3,3,4,4-hexafluoropene-1,5-diol formal) of a desired number average molecular weight by controlling the relative amounts of 1,3-dioxa-5,5,6,6,7,7-hexafluorocyclooctane monomer, 2,2,3,3,4,4-hexafluoropentane-1,5-diol, and the catalyst trifluoromethane sulfonic acid (having a determined activity) used to produce the polymer.

REFERENCES:
patent: 3419531 (1968-12-01), Trischler
patent: 3442865 (1969-05-01), Weissermel et al.

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