Patent ID: 7780775
Filing Date: 2010-08-24
Classification: C09B,C09D

Abstract:
1. A process for producing a pigment composition, comprising the step of milling a crude pigment together with from 150 to 400% by weight, based on the amount of crude pigment, of a resin composition comprising from 5 to 100% by weight, of a phenol-modified rosin fraction of weight-average molecular weight from 5000 to 40000 Da; from 5 to 80% by weight, of a hydrocarbon resin of softening point from 105 to 165° C.; from 5 to 50% by weight, of an esterified rosin; a from totally 5% by weight to a maximal total percentage comprising each below 5% by weight, of two resins selected from the group consisting of said phenol-modified rosin fraction, said hydrocarbon resin and said esterified rosin; or from totally 5% by weight to a maximal total percentage comprising each below 5% by weight, of all three resins of the group consisting of said phenol-modified rosin fraction, said hydrocarbon resin and said esterified rosin; each based on the weight of the resin composition; and optionally from 1 to 10% by weight, based on the amount of crude pigment, of an antioxidant and optionally, further components, wherein the composition remains pulverulent or granular during milling.