Patent ID: 9458321
Filing Date: 2016-10-04
CPC Classification: C01P,C09B,C09C,C09D

Claim Text:
1. A process for making a pigment press cake comprising the steps of: (a) grinding a mixture comprising a pigment, a grinding agent and a vehicle to form a premix, wherein said grinding agent is insoluble in said vehicle and soluble in water, (b) adding to said premix a polyetheramine having the formula (I): (c) grinding said premix and said polyetheramine together; and (d) washing with an aqueous medium to remove said grinding agent to form a press cake; wherein each Q 1 and Q 3 is independently —OCH 2 CH 2 — or —OCH 2 CH(CH 3 )—; each Q 2 is —OCH 2 CH(CH 3 )—; R 1 is CH 2 CH(NH 2 )(CH 3 ) or NH 2 ; each R 2 and R 3 is independently C 1 -C 4 alkyl or a straight bond; each R 4 is H, C 1 -C 4 alkyl or -(Q 3 ) q -NH 2 ; each R 5 is C 1 -C 4 alkyl or a straight bond; n is an integer from 0 to 60; m is an integer from 2 to 30; p is 0; each q is an integer from 0 to 30; and said grinding agent is an inorganic salt.