Yttrium and rare earth compounds catalyzed lactone polymerizatio

Details Yttrium and rare earth compounds catalyzed lactone polymerizatio Yttrium and rare earth compounds catalyzed lactone polymerizatio

1991-04-03

1992-03-10

Stoll, Robert L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Rare earth containing

C07F 1500

Patent

active

050950983

ABSTRACT:
Process for yttrium and rare earth compound catalyzed polymerization of lactones and the living polymer compositions of such polymerizations, novel polyester products of such polymerizations and novel yttrium and rare earth metal compounds useful as catalysts in the polymerization of biodegradable polymers for medical uses and flexible films for packaging.

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patent: 4289873 (1981-09-01), Kubo et al.
patent: 4357462 (1982-11-01), Kubo et al.
patent: 4719246 (1988-01-01), Murdoch et al.
patent: 4766182 (1988-08-01), Murdoch et al.
patent: 4800219 (1989-01-01), Murdoch et al.

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