Process for preparation of copolymers from polyesters and alipha

Details Process for preparation of copolymers from polyesters and alipha Process for preparation of copolymers from polyesters and alipha

1974-11-29

1976-03-09

Schain, Howard E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 75T, C08G 6360, C08L 6700

Patent

active

039431894

ABSTRACT:
Disclosed is a process for preparation of copolymers which have an inherent viscosity of at least 0.4 and are formed from polyesters and aliphatic polyformals. The process comprises contacting within a temperature range of 220.degree. to 280.degree.C. a poly(tetramethylene terephthalate) type polyester and selected aliphatic polyformals.

REFERENCES:
patent: 2382938 (1945-08-01), Gresham
patent: 2968646 (1961-01-01), Caldwell et al.
patent: 3023192 (1962-02-01), Shivers
patent: 3547888 (1970-12-01), Sardessai et al.
patent: 3580973 (1971-05-01), Kennedy et al.
patent: 3644574 (1972-02-01), Jackson et al.
patent: 3766146 (1973-10-01), Witsiepe
patent: 3875257 (1975-04-01), Musser et al.

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