Method for the preparation of hydroxy-terminated polycarbonate p

Details Method for the preparation of hydroxy-terminated polycarbonate p Method for the preparation of hydroxy-terminated polycarbonate p

1987-04-20

1988-04-05

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528198, 528199, 528200, C08G 6362

Patent

active

047360135

ABSTRACT:
A method for preparing thermoplastic carbonate polymers terminated with hydroxy groups is disclosed, in which a dihydric phenol is reacted with a carbonyl halide in the presence of a monotetrahydropyranyl ether salt. The hydroxy-terminated polymer is then obtained by cleaving the tetrahydropyranyl group with oxalic acid or a hydrogen halide acid.

REFERENCES:
patent: 3697481 (1972-10-01), Bialous et al.
patent: 4233431 (1980-11-01), Idel et al.
patent: 4273717 (1981-06-01), Carnahan
patent: 4469860 (1984-09-01), Rosenquist

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