Patent ID: 6392000
Filing Date: 2002-05-21
Classification: C08G,H01B,Y10T

Abstract:
A binder comprising a structural block polymer of structural blocks of A and B and at least one of the structural blocks of C and D or E and F and wherein the structural blocks are formed from:A aliphatic, saturated or unsaturated, linear or branched monocarboxylic acids having 15 to 50 carbon atoms, B aromatic and/or aliphatic polyisocyanates having at least 2 isocyanate groups, C aromatic and/or aliphatic polycarboxylic acids having at least 2 carboxyl and/or anhydride groups, D aromatic and/or aliphatic polyisocyanates having at least 2 isocyanate groups which may be the same as or different from B, E polyalcohols having at least 2 hydroxyl groups, and F aromatic and/or aliphatic polyisocyanates having at least 2 isocyanate groups which may be the same as or different from B and D, and wherein the composition of the block polymer corresponds to the following definition:(f+g)/h=0.5 to 1.0 i/(hâˆ’fâˆ’g)=2.0 to 25.0 a/(c+e)=0.1 to 1.0 where a=total moles of A, c=total moles of C, e=total moles of E, f=total equivalents of hydroxyl groups, g=total equivalents of carboxyl and anhydride groups, h=total equivalents of isocyanate groups, i=total moles of A to F.