Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1988-08-22
1989-05-02
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521178, 528371, 528405, C08G 5900
Patent
active
048268879
ABSTRACT:
Process for the preparation of polycarbonates by reacting at least one epoxy compound with carbon dioxide at 40.degree. to 200.degree. C. and 2 to 40 bar in the presence of a catalytic amount of a double metal cyanide complex and
REFERENCES:
patent: 3248415 (1966-04-01), Stevens
patent: 4500704 (1985-02-01), Kruper, Jr. et al.
Kuyper Jan
Lednor Peter W.
Pogany George A.
Foelak Morton
Shell Oil Company
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