Production method of pigment-dispersing resin
AssigneeKansai Paint Co., Ltd.
InventorsMasami Kobata, Noriyuki Yamada, Hiromi Harakawa
Life of this patent
Estimating the term…
Abstract
This invention provides a method for producing a pigment-dispersing resin which contains divalent group(s) represented by a general formula (I): (in which R1 stands for C1-10 alkylene group, m is an integer of 1-30, and the m recurring units, may be the same or different), phosphoric acid group(s) and/or sulfonic acid group(s), characterized by copolymerizing a polymerizable unsaturated monomeric mixture in a reaction solvent containing at least 30 mass %, based on the total mass of the reaction solvent, of an organic solvent having no hydroxyl group and having a solubility in 20° C. water of at least 100 mass %.
Claims13
A method for producing a pigment-dispersing resin (A) containing divalent group(s) represented by the following formula (I):
- (wherein R1 is a C1-10 alkylene group, m is an integer of 1-30, and the m recurring units,
- may be the same or different,
- phosphoric acid group(s) and/or sulfonic acid group(s), comprising:
- copolymerizing a polymerizable unsaturated monomeric mixture
- (a-3):
- a mixture of polymerizable unsaturated monomer(s) (m-6) having the divalent group represented by the above formula (I) and phosphoric acid group, and polymerizable unsaturated monomer(s) (m-7) other than the polymerizable unsaturated monomer(s) (m-6), wherein the polymerizable unsaturated monomeric mixture (a-3) is composed of 1-90 mass % of the polymerizable unsaturated monomer(s) (m-6), and 10-99 mass % of the polymerizable unsaturated monomer(s) (m-7), based on a total amount of the polymerizable unsaturated monomers (m-6) and (m-7);
- in a reaction solvent (b) which comprises at least 30 mass %, based on a total mass of the reaction solvent, of an organic solvent (b-1) having no hydroxyl group and having a solubility in 20° C. water of at least 100 mass %.
Dependencies are inferred from the claim text.