Claims
- 1. A bicompatible polyester comprising a saccharide selected from the group consisting of polysaccharide and glucoside bonded to the structure of a polymer molecule having recurring structural units consisting essentially of a glycolic acid unit, a lactic acid unit or a glycolic acid unit and a lactic acid unit, said recurring structural units being represented by the formula (I): ##STR4## wherein each of R.sub.1 and R.sub.2 is a hydrogen atom or a methyl group and may be the same or different wherein the polyester has a weight average molecular weight converted to polystyrene of from 1900 to 250000.
- 2. The biocompatible polyester of claim 1 wherein the saccharide is a glucoside.
- 3. The biocompatible polyester of claim 1 wherein the saccharide is methylglucoside.
- 4. A biocompatible polyester obtained by a process comprising polymerizing glycolide, lactide or glycolide and lactide in the presence of a saccharide selected from the group consisting of polysaccharide and glucoside and bonding said saccharide to the structure of a polymer molecule having recurring structural units essentially consisting of a glycolic acid unit, a lactic acid unit or a glycolic acid unit and a latic acid unit, said recurring structural units being represented by the formula (I): ##STR5## wherein each of R.sub.1 and R.sub.2 is a hydrogen atom or a methyl group and may be the same or different wherein the polyester has a weight average molecular weight converted to polystyrene of from 1900 to 250000.
- 5. The biocompatible polyester of claim 4 wherein the saccharide is a glucoside.
- 6. The biocompatible polyester of claim 4 wherein the saccharide is methylglucoside.
- 7. The biocompatible polyester of claim 4 wherein the hydroxyl group concentration of the saccharide in the polymerization is from 0.001 to 1% by mole per mole of glycolide, lactide or glycolide and lactide.
- 8. The biocompatible polyester of claim 4 wherein the hydroxyl group concentration of the saccharide in the polymerization is from 0.01 to 0.1% by mole per mole of glycolide, lactide or glycolide and lactide.
- 9. A process for preparing a bicompatible polyester comprising a saccharide selected from the group consisting of polysaccharide and glucoside bonded to the structure of a polymer molecule having recurring structural units consisting essentially of a glycolic acid unit, a lactic acid unit or a glycolic acid unit and a lactic acid unit, said recurring structural units being represented by the formula (I): ##STR6## wherein each of R.sub.1 and R.sub.2 is a hydrogen atom or a methyl group and may be the same or different wherein the polyester has a weight average molecular weight converted to polystyrene of from 1900 to 250000, comprising polymerizing glycolide, lactide or glycolide and lactide in the presence of the saccharide.
- 10. The process of claim 9 wherein the saccharide is methylglucoside.
- 11. The process of claim 9 wherein the hydroxyl group concentration of the saccharide in the polymerization is from 0.001 to 1% by mole per mole of glycolide and/or lactide.
- 12. The process of claim 9 wherein the hydroxyl group concentration of the saccharide in the polymerization is from 0.01 to 0.1% by mole per mole of glycolide, lactide or glycolide and lactide.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1-16248 |
Jan 1989 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 07/582,192, filed Sep. 25, 1990 and now abandoned.
US Referenced Citations (3)
Foreign Referenced Citations (6)
Number |
Date |
Country |
2551072 |
Mar 1985 |
FRX |
62-64824 |
Mar 1987 |
JPX |
62-31736 |
Jul 1987 |
JPX |
63-17929 |
Jan 1988 |
JPX |
1604177 |
Dec 1981 |
GBX |
2158081 |
Nov 1985 |
GBX |
Continuations (1)
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Number |
Date |
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Parent |
582192 |
Sep 1990 |
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