Composition of and method for forming high molecular weight pred

Details Composition of and method for forming high molecular weight pred Composition of and method for forming high molecular weight pred

1994-04-25

1995-08-08

Marquis, Melvyn I.

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

Synthetic resins

From carboxylic acid or derivative thereof

525408, 525413, 525415, 528357, 528361, C08G 6308

Patent

active

054400074

ABSTRACT:
High molecular weight, biodegradable polymers of substituted-poly(.beta.-propioesters), wherein the repeat unit sequences have a predominantly syndiotactic arrangement and a method of forming such polymers are disclosed. The method includes exposing a substituted-.beta.-propiolactone to a tin-based organometallic catalyst for a sufficient combination of time and temperature to form the predominantly syndiotactic substituted-poly(.beta.-propioester).

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Hans R. Kricheldorf et al., "Polylactones. 20. Polymerization of .epsilon.-Caprolactone with Tributyltin Derivatives": A Mechanistic Study, Macromolecules, 24:1944-1949 Apr./(1991).
Hans R. Kricheldorf et al., "Poly(lactones).9.Polymerization Mechanism of Metal Alkoxide Initiated Polymerizations of Lactide and Various Lactones", Macromolecules, 21:286-293 Feb./(1988).

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