Patent ID: 6228969
Filing Date: 2001-05-08
Classification: C08G,C09J,Y10T

Abstract:
A biodegradable linear polyester urethane, wherein the linear polyester urethane consist of units of the general formula (I): ##STR21##whereby R is an unsubstituted or substituted, saturated or unsaturated (C.sub.1 -C.sub.10)-hydrocarbon group, and the substituents are selected from group A consisting of halogen, pseudo-halogen, (C.sub.1 -C.sub.10)-alkyl, (C.sub.1 -C.sub.10)-alkoxy, allyl, vinyl, benzyl, unsubstituted, or substituted aryl, alkenyl, alkinyl, amide, (C.sub.1 -C.sub.6)-dialkylamino, unsubstituted or substituted (C.sub.3 -C.sub.8)-cycloalkyl; and that the aryl or cycloalkyl substituents are selected from the group consisting of halogen, pseudo-halogen, (C.sub.1 -C.sub.10)-alkyl, (C.sub.1 -C.sub.10)-alkoxy, amide, (C.sub.1 -C.sub.6)-dialkylamino, alkenyl, alkinyl, allyl, and vinyl; and wherebyR.sup.I is selected from the group consisting of: ##STR22##with a=2 to 12, and b=1 to 3000;R.sup.II is a ring-opening product of a compound selected from the group consisting of b-propiolactone, .gamma.-butyrolactone, .delta.-valerolactone, .epsilon.-caprolactone, and N-protected D, L-serine-lactone, which compound may be substituted with a substituent from group A;R.sup.III and R.sup.IV are independently of each other identical or different and selected from the group consisting of H, --OR, whereby R is as defined above, halogen, pseudo-halogen, benzyl, allyl, vinyl, unsubstituted or substituted aryl, (C.sub.1 -C.sub.10)-alkyl, alkenyl, alkinyl, amide, (C.sub.1 -C.sub.6)-dialkylamino, unsubstituted or substituted (C.sub.3 -C.sub.8)-cycloalkyl, with at least one hetero-atom, unsubstituted or substituted five-, six- or seven-link aromatic compound, or hetero aromatics with at least one hetero-atom, whereby the hetero-atom is O, S or N; and the substituents are taken from group A;whereby 0.ltoreq.x+y.ltoreq.60, and 2.ltoreq.1+m.ltoreq.60, and z=1 to 25.