Composed of ester of fosforato, process for preparing the compound of Esther fosforato, half of a magnetic recording and process for preparing a means of recording, a magnetic pigment / binder

摘要

Radiation curable phosphorate ester compounds of the following formula: IMAGE wherein, Rd is selected from the group consisting of IMAGE wherein n=1-3, and those bond sites on Y not occupied by Rd are occupied by a moiety selected from the group consisting of -H and -ReOH wherein Re is a straight chain or branched alkyl having 1 to 20 carbon atoms; Ra is selected from -H and -CH3; -Y- is a hydrocarbon moiety selected from the group consisting of straight chain, cyclic ad branched aliphatic, aromatic, and alicyclic moieties of 1-30 carbon atoms; and R is an alkylene moiety having 2 to 5 carbon atoms; Rf is selected from the group consisting of hydrogen or methyl; A is selected from the group consisting of IMAGE +TR IMAGE in which n1 is an integer from 1 to 6; and Rg is selected from the group consisting of alkylene moieties having 2 to 10 carbon atoms, 5- or 6-membered carbocyclic aliphatic radicals having 5 to 10 carbon atoms, and arylene radicals having 6 to 10 carbon atoms; and m=1-10. These compounds are useful as dispersants in magnetic recording media, and yield media of improved stiffness.