| abstract |
(57) [Summary] [Object] To provide a high-performance pigment composition as a binder. [Structure] At the time of emulsion copolymerization of a conjugated diene (a), an ethylenically unsaturated carboxylic acid (b) and another monomer (c), a chain transfer agent is added at a point when the polymerization rate of the monomer exceeds 85%. A pigment composition comprising a copolymer latex produced by adding the above components and an inorganic pigment containing calcium carbonate and / or clay as a main component. [Effect] When used as a binder for pigment-coated paper, the balance between the blister resistance and the stickiness of the coated paper is improved. |