Patent ID: 6689731
Filing Date: 2004-02-10
Classification: C08G,C09B,C11D

Abstract:
A block-copolymer phosphoric ester or salt thereof of the general formula[R1O(SO)a(EO)b(CH2CHCH3O)c(BO)d]xPOâ€”(OH)3âˆ’xâ€ƒâ€ƒ(I) whereR1=a straight-chain or branched or cycloaliphatic radical, so=styrene oxide, EO=ethylene oxide, BO=butylene oxide and a=1 to <2, b=3 to 100, c=0 to 10, d=0 to 3, x=1 or 2 where b&gE;a+c+d.