Cyclic polycarbonate oligomer containing spiro diLactam moieties

Details Cyclic polycarbonate oligomer containing spiro diLactam moieties Cyclic polycarbonate oligomer containing spiro diLactam moieties

1990-08-13

1992-03-10

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528196, 528201, 528204, 528323, C08G 6412

Patent

active

050950886

ABSTRACT:
Novel cyclic polycarbonate oligomers of relatively high glass transition temperatures consist essentially of carbonyl moieties alternating in a cyclic chain with moieties of a 1,6-diaza [4.4] spirodilactam having an oxyaryl-containing substituent on each ring nitrogen atom and, optionally, moieties of a di(oxyphenyl) compound.

REFERENCES:
patent: 4197394 (1980-04-01), Hallgren
patent: 4605731 (1986-08-01), Evans et al.
patent: 4644053 (1987-02-01), Brunelle et al.
patent: 4740583 (1988-04-01), Brunelle et al.
patent: 4746726 (1988-05-01), Evans et al.
patent: 4906725 (1990-03-01), Wang
Schnell, Industrial and Engineering Chemistry, 51, (2), pp. 157-160 (1959).

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