Patent ID: 6720403
Filing Date: 2004-04-13
Classification: C08G,D01F,Y10S

Abstract:
A polyurethaneurea comprising the reaction product of:i. a polymeric glycol; ii. a diisocyanate composition comprising at least one Orthoalky-MDI selected from the group represented by Formula I: wherein:each R1 may be the same or different and are independently selected from the group consisting of hydrogen, methyl, ethyl, propyl and isopropyl; each R2 may be the same or different and are independently selected from the group consisting of hydrogen, methyl, ethyl, propyl and isopropyl; each X may be the same or different and are selected from the group consisting of hydrogen, fluorine, and chlorine; wherein the total amount of said at least one Orthoalkyl-MDI of Formula I is at least about 20 mole percent of said diisocyanate composition; and iii. a chain extender composition comprising at least one bulky diamine selected from the group consisting of: 2,2-dimethyl1.3-pentanediamine, 2,5-dimethyl-2,5-hexanediamine, 2,3,5,6-tetramethyl-1,4-diaminocyclohexane, and 2,5-dimethylpiperazine; and wherein the total amount of said at least one bulky diamine is at least about 80 mole percent of said chain extender composition; wherein said polyurethaneurea polymer is amide soluble.