Patent ID: 6403655
Filing Date: 2002-06-11
Classification: A61K,A61L,B33Y,C08G,C08L,C09D

Abstract:
An aliphatic polyoxaester having a first repeating unit of the formula:[Oâ€”C(O)â€”C(R1)(R2)â€”Oâ€”R3â€”Oâ€”C(Râ€²1)(Râ€²2)â€”C(O)â€”]and a second repeating unit selected from the group consisting of formulas[â€”Oâ€”R4â€”]A; and[Oâ€”R5â€”C(O)â€”]B, wherein R1, Râ€²1, R2 and Râ€²2 are independently hydrogen or an alkyl group containing 1 to 8 carbon atoms; R3 is an alkylene unit containing from 2 to 12 carbon atoms or is an oxyalkylene group of the following formula:â€”[(CH2)Câ€”Oâ€”]Dâ€”(CH2)Eâ€”â€ƒâ€ƒIV wherein 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; R4 is an alkylene unit containing from 2 to 8 carbon atoms; A is an integer in the range of from 1 to 2,000; R5 is selected from the group consisting of â€”C(R6)(R7)â€”, â€”(CH2)3â€”Oâ€”, â€”CH2â€”CH2â€”Oâ€”CH2â€”, â€”CR8Hâ€”CH2â€”, â€”(CH2)5â€”, â€”(CH2)Fâ€”Oâ€”C(O)â€” and â€”(CH2)Fâ€”C(O)â€”CH2â€”; R6 and R7 are independently hydrogen or an alkyl containing from 1 to 8 carbon atoms; R8 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.