CABOT PATENTS PROCESS FOR
PREPARING MODIFIED PIGMENTS
Patent No. U.S. 6,916,367 B2
Cabot Corporation has obtained a
patent for a modified pigment
preparation that is comprised of a
pigment having attached a group
comprising the formula -X-Sp-S-
[PI], wherein X is an arylene, heteroarylene,
or alkylene group, Sp is
a spacer group, and PI represents a
polymeric group comprising at least
one ionic or ionizable group comprising
the reaction product of a
polymer having at least one anhydride,
at least one activated carboxylic
acid, or at least one carboxylic
acid or salt thereof and an
alkylamine, arylamine, or alcohol.