Branched aliphatic polyesters
AssigneeEastman Chemical Company
InventorsPhillip M. Cook, John M. Staples, Charles R. Tomlinson
Life of this patent
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Abstract
A gum base comprising at least one crosslinked branched aliphatic biodegradable polyester comprising repeat units formed from at least one polyol having three to four hydroxy groups, or ester thereof, at least one dibasic acid, or ester thereof, and at least one long chain monocarboxylic acid, or ester thereof. The process of producing a crosslinked branched aliphatic biodegradable polyester gum base by reactive extrusion is also included.
Claims15
A process for making a crosslinked branched aliphatic biodegradable polyester comprising:
- (a) reacting at least one polyol having from three to four hydroxy groups, or ester thereof, at least one dibasic acid, or ester thereof, and at least one long chain monocarboxylic acid, or ester thereof, at a temperature and time sufficient to form a pre-gel;
- (b) crosslinking the pre-gel by extruding the pre-gel at a temperature and time sufficient to provide a crosslinked branched aliphatic biodegradable polyester.
A process for making a crosslinked branched aliphatic biodegradable polyester comprising:
- (a) reacting at least one polyol having from three to four hydroxy groups, or ester thereof, and at least one dibasic acid, or ester thereof at a temperature and time sufficient to form a pre-gel;
- (b) crosslinking the pre-gel by extruding the pre-gel at a temperature and time sufficient to provide a crosslinked branched aliphatic biodegradable polyester.
Dependencies are inferred from the claim text.