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US 6,639,047 B2Granted
Biodegradable disposable syringe
AssigneeBoo Yoon Tech, Inc.
InventorYeo Saeng Yoon
Life of this patent
Estimating the term…
Abstract
The present invention relates to a biodegradable disposable syringe and more particularly, to the biodegradable disposable syringe by using a novel polyester resin composition under a specific injection molding condition, thus being able to be disposed of without causing environmental contamination.
Claims6
A polyester resin produced by the esterification and condensation of:
- 1) an aromatic dicarboxylic acid or an acid anyhdride thereof;
- 2) succinic acid or adipic acid;
- and
- 3) 1,4-butanediol or ethylene glycol, wherein the polyester has a biodegradability of at least about 90%.
1 more element
A process for producing a polyester, said process comprising the steps of:
- esterification of succinic acid and 1,4-butanediol to yield an esterification product;
- and
- polycondensation of the esterification product under 0.3 torr at 245° C. for at least 155 mm to yield a polyester having a biodegradability of at least about 90%.
Dependencies are inferred from the claim text.