Process for producing substantially linear carbonate polymer

Details Process for producing substantially linear carbonate polymer Process for producing substantially linear carbonate polymer

1981-06-24

1982-12-21

Cockeram, H. S.

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

Synthetic resins

From reactant having a halogen atom or oxygen single bonded...

524405, 524409, 524435, 528372, C08G 6362

Patent

active

043650554

ABSTRACT:
In the preparation of a substantially linear carbonate polymer wherein carbonic dihalide is introduced to a substantially anhydrous solution comprising at least one substituted or unsubstituted 1,3-propanediol, the coproduction of cyclic carbonate is reduced by the presence in the solution of a catalytic amount of nitrogen-containing, hydrohalide salt-forming, thermally regenerable organic catalyst. The preferred carbonic dihalide is phosgene and the preferred catalyst is pyridine.

REFERENCES:
patent: 2787630 (1957-04-01), Katz et al.
patent: 2873291 (1959-02-01), Spiegler
patent: 3112292 (1963-11-01), Bottenbauch et al.
patent: 3207814 (1965-09-01), Goldberg
patent: 3334128 (1967-08-01), Brown
patent: 3382207 (1968-05-01), Jaquiss
patent: 3527734 (1970-09-01), Matzner
patent: 3688001 (1972-08-01), Exner et al.
patent: 3700625 (1972-10-01), Brady et al.
patent: 3763644 (1973-10-01), Jackson et al.
patent: 3779984 (1973-12-01), Exner et al.
patent: 3804792 (1974-04-01), Pews
patent: 3823175 (1974-07-01), Exner et al.
patent: 3855277 (1974-12-01), Fox
patent: 4012406 (1977-03-01), Buysch et al.
patent: 4085129 (1978-04-01), Semler et al.
Wertheim, Textbook of Organic Chemistry, 3rd Ed., McGraw-Hill, N.Y. (1951) pp. 682-687.
SRI International-1982 Directory of Chemical Producers, U.S.A. Menlo Park, CA, pp. 871 and 987.
Sarel et al., Journal of Organic Chemistry, vol. 24, pp. 1873-1877 (1959).
Schnell, Chemistry and Physics of Polycarbonates, Interscience Publishers (1964), pp. 9-12 and 72.
Ludwig et al., Journal of the American Chemical Society, vol. 73, pp. 5774-5781 (1951).
Sarel et al., Journal of the American Chemical Society, vol. 80, pp. 4596-4599 (1958).

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