Polysaccharides grafted with aliphatic polyesters derived from c

Details Polysaccharides grafted with aliphatic polyesters derived from c Polysaccharides grafted with aliphatic polyesters derived from c

1996-04-15

1997-04-01

Nutter, Nathan M.

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

Synthetic resins

From carbohydrate or derivative as a reactant

527305, C08G 1600

Patent

active

056166710

ABSTRACT:
Novel synthetic pathways to derive aliphatic polyester-grafted polysaccharides from cyclic ester monomers, preferably, poly(.epsilon.-caprolactone) and starch. Different reaction schemes lead to compositions with various levels of grafting. The grafting reactions were conducted using bulk monomer and an organometallic polymerization agent (catalyst or initiator) such as metal alkoxides initiators which were generated in-situ by the reaction of metal alkyls with hydroxyl groups of the polysaccharide. The grafting reactions were characterized by very fast reaction times of the order of a few minutes to effect complete conversion of monomer. Biodegradable compositions, particularly using these poly(.epsilon.-caprolactone)-grafted starch are described for use in film applications.

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