Claims
- 1. A degradable resin composition comprising 100 parts by weight of a lactic acid base polymer and 0.05-5 parts by weight of one or more compounds selected from the group consisting of 2-hydroxy-4-n-octoxybenzophenone, 4-dodecycloxy-2-hydroxybenzotriazole, 2-(2'hydroxy-5'-methylphenyl)benzotriazole, 2-(2'hydroxy-3',5'-di-tert-butylphenyl)benzotriazole, and bis(2,2,6,6-tetramethyl-4-piperidyl)sebacate.
- 2. The degradable resin composition of claim 1 wherein the lactic acid base polymer is one or more polymers selected from the group consisting of a polylactic acid and a lactic acid/hydroxycarboxylic acid copolymer.
- 3. A degradable resin composition of claim 1 wherein the lactic acid base polymer has a molecular weight of 30,000.about.500,000.
- 4. The degradable resin composition of claim 2 wherein the polylactic acid is one or more polymers selected from the group consisting of poly(L-lactic acid), poly(DL-lactic acid) having 50.about.100% by mole of L-lactic acid units, poly(D-lactic acid) and poly(DL-lactic acid) having 50.about.100% by mole of D-lactic acid units.
- 5. The degradable resin composition of claim 2 wherein the lactic acid/hydroxycarboxylic acid copolymer is one or more polymers selected from the group consisting of a lactic acid/glycolic acid copolymer having 30.about.98% by mole of lactic acid units and 70.about.2% by mole of glycolic acid units, and a lactic acid/hydroxycaproic acid copolymer having 10.about.98% mole of lactic acid units and 90.about.2% by mole of hydroxycaproic acid units.
- 6. The degradable resin composition of claim 1 which contains 1.about.50 parts by weight of one or more plasticizers selected from the group consisting of glycerol triacetate, lactic acid, a lactic acid oligomer having a polymerization degree of 2.about.10, and lactide for 100 parts by weight of the lactic acid base polymer.
Priority Claims (4)
Number |
Date |
Country |
Kind |
4-237288 |
Sep 1992 |
JPX |
|
4-257999 |
Sep 1992 |
JPX |
|
4-282938 |
Oct 1992 |
JPX |
|
5-63601 |
Mar 1993 |
JPX |
|
Parent Case Info
This application is a divisional of application Ser. No. 08/113,102, filed Aug. 30, 1993, now U.S. Pat. No. 5,489,474
US Referenced Citations (10)
Foreign Referenced Citations (3)
Number |
Date |
Country |
435080 |
Jul 1991 |
EPX |
2-107684 |
Apr 1990 |
JPX |
2009768 |
Jun 1979 |
GBX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
113102 |
Aug 1993 |
|