| 摘要 |
<p>The invention provides a polyurethane amide segmented copolymer selected from: a) a segmented block polyurethane amide (PEUAm) of the following repeating unit [I] <CHEM> wherein R is hexamethylene, 4,4 min -diphenylmethane, toluene, naphthalene, 4,4 min -dicyclohexylmethane, cyclohexyl, 3,3 min -dimethylphenyl, 3,3 min -dimethyl-diphenylmethane, 4,6 min -xylylene, 3,5,5-trimethylcyclohexyl, 2,2,4-trimethyl-hexamethylene or p-phenylene, R min is selected from a linear or branched, unsubstituted or substituted hydrocarbyl group. the substituents being selected from halogen or hydroxy, or R min is a bivalent Si-(R1R2) group, wherein R1 and R2 are identical or different groups selected from hydrogen, alkyl, a double bond-containing hydrocarbyl group, halogen, hydroxy or an aromatic ring-containing group, and m is a positive integer, A is a bivalent saturated or unsaturated, linear or branched, substituted or unsubstituted hydrocarbyl group, the substituents being selected from halogen, hydroxy, cyano, carboxy or amino groups; or A is an unsubstituted or substituted aromatic ring-containing group, the substituents being selected from halogen, hydroxy, cyano, carboxy or amino groups, and n is zero or a positive integer; b) a segmented block polyurethane amide of the following repeating unit [II] <CHEM> wherein R is hexamethylene, 4,4 min -diphenylmethane, toluene, naphthalene, 4,4 min -dicyclohexylmethane, cyclohexyl, 3,3 min -dimethylphenyl, 3,3 min -dimethyl-diphenylmethane, 4,6 min -xylylene, 3,5,5-trimethylcyclohexyl, 2,2,4-trimethyl-hexamethylene or p-phenylene, R min is selected from a linear or branched, unsubstituted or substituted hydrocarbyl group, the substitutents being selected from halogen or hydroxy, or R min is a bivalent Si-(R1R2) group, wherein R1 and R2 are identical or different groups selected from hydrogen, alkyl, a double bond-containing hydrocarbyl group, halogen, hydroxy or an aromatic ring-containing group, and m is a positive integer and B and D are each a bivalent, saturated or unsaturated, linear or branched, unsubstituted or substituted hydrocarbyl group, the substituents being selected from halogen, hydroxy, cyano, carboxy or amino groups, or B and D are each an unsubstituted or substituted aromatic ring-containing group, the substituents being selected from halogen, cyano, carboxy or amino groups wherein B and D can be the same or different, and a and b are identical or different and are each 0 or 1, and X and Y are identical or different grafted substituents, usually bearing biomedical relevance. i</p> |
