Patent ID: 6540825
Filing Date: 2003-04-01
Classification: C09B,C09D

Abstract:
A method of forming a silica-free carbon black pigment that is dispersible in an organic solvent or resin, the method comprising the steps of:1. dispersing (A) the reaction product of a hydrocarbyl substituted succinic acid or anhydride with an alkanol amine in (C) water to form an emulsion, said alkanol amine being represented by the formula R1R2R3N wherein R1 is a hydroxyhydrocarbyl group and R2 and R3 are independently hydrogen, hydrocarbyl or hydroxyhydrocarbyl; 2. mixing the emulsion from (1) with (B) carbon black fluff to obtain a pigment composition; 3. removing water from said pigment composition to form said carbon black pigment which comprises (A) said reaction product of said hydrocarbyl-substituted succinic acid or anhydride with said alkanol amine deposited on the surface of carbon black pigment.