Patent ID: 6147168
Filing Date: 2000-11-14
Classification: A61F,A61K,A61L,B33Y,C08G,C08L,C09D,Y10T

Abstract:
A polyoxaester copolymer formed from a polyoxaesters copolymer having a first divalent repeating unit of formula IA:[--O--C(O)--R.sub.30 --C(O)--] IAa second divalent repeating unit of the formula IB:[O--C(O)--C(R.sub.1)(R.sub.2)--O--R.sub.3 --O--C(R'.sub.1)(R'.sub.2)--C(O)--] IBand a third repeating unit selected from the group of formulas consisting of:[--O--R.sub.4 --].sub.A, II[--O--R.sub.5 --C(O)--].sub.B, III([--O--R.sub.5 --C(O)].sub.P --O--).sub.L G XIand combinations thereof, wherein R.sub.30 is an alkylene, arylene, arylalkylene, substituted alkylene, substituted arylene and substituted alkylarylene provided that R.sub.30 cannot be --[C(R.sub.1)(R.sub.2)].sub.1-2 --O--(R.sub.3)--O--[C(R'.sub.1)(R'.sub.2)].sub.1-2 --; R.sub.1, R'.sub.1, R.sub.2 and R'.sub.2 are independently hydrogen or an alkyl group containing 1 to 8 carbon atoms; R.sub.3 is an alkylene unit containing from 2 to 12 carbon atoms or is an oxyalkylene group of the following formula:--[(CH.sub.2).sub.C --O--].sub.D --(CH.sub.2).sub.E -- IVwherein C is an integer in the range of from 2 to about 5, D is an integer in the range of from about 0 to about 2,000, and E is an integer in the range of from about 2 to about 5, except when D is zero, in which case E will be an integer from 2 to 12; R.sub.4 is an alkylene unit containing from 2 to 8 carbon atoms; A is an integer in the range of from 1 to 2,000; R.sub.5 is selected from the group consisting of --C(R.sub.6)(R.sub.7)--, --(CH.sub.2).sub.3 --O--, --CH.sub.2 --CH.sub.2 --O--CH.sub.2 --, --CR.sub.8 H--CH.sub.2 --, --(CH.sub.2).sub.5 --, --(CH.sub.2).sub.F --O--C(O)-- and --(CH.sub.2).sub.F --C(O)--CH.sub.2 --; R.sub.6 and R.sub.7 are independently hydrogen or an alkyl containing from 1 to 8 carbon atoms; R.sub.8 is hydrogen or methyl; F is an integer in the range of from 2 to 6; B is an integer in the range of from 1 to n such that the number average molecular weight of formula III is less than about 200,000; P is an integer in the range of from 1 to m such that the number average molecular weight of formula XI is less than about 1,000,000; G represents the residue minus from 1 to L hydrogen atoms from the hydroxyl groups of an alcohol previously containing from 1 to about 200 hydroxyl groups; and L is an integer from about 1 to about 200.