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AssigneeNippon Shokubai Co., Ltd.
InventorsHayato Ikeda, Nobuyuki Ando, Yoshinobu Asako, Kazuhiro Anan, Tatsuhito Matsuda, Hironobu Toribuchi, Mitsuo Kushino, Keiichi Uehara, Yoshikuni Mori
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A carbon black graft polymer which excels in stability of dispersion in various media, coloring property, and imperviousness to light is obtained by mixing under heating a block- or graft-copolymer having a segment (A) containing a reactive group capable of reacting with a functional group on the surface of carbon black and a segment (B) different in skeletal structure from the segment (A) with carbon black. The carbon black graft polymer, by causing the graft chain thereof to incorporate therein an ethylenically unsaturated double bond and/or a carboxyl group, is enabled to manifest photosensitivity, developability with an alkali, and insulating property and acquire usefulness for a black photocurable resin composition such as, for example, the material for the formation of a black matrix particularly in a color filter.
A carbon black graft polymer, which is characterized by having a block- or graft-copolymer graft chain, and which is obtained by a process comprising mixing under heating carbon black with a block- or graft-copolymer comprising a segment (A) having a reactive group capable of reacting with a functional group on the surface of said carbon black and a segment (B) different in skeletal structure from said segment (A).
A method for the production of a resin composition containing carbon black, which method comprises melting and mixing a resin component destined to serve as a dispersion medium and carbon black in combination with a block- or graft-copolymer, said copolymer having a segment (A) containing a reactive group capable of reacting with a functional group on the surface of said carbon black and a segment (B) containing substantially none of said reactive group and exhibiting higher affinity for said resin component than said segment (A).
A method for the treatment of minute solid particles for surfacial modification, which method comprises incorporating minute solid particles and a reactive graft- or block-copolymer containing a reactive group capable of reacting with a functional group on the surface of said minute solid particles in a liquid dispersion medium, and subjecting the resultant mixture as kept in a heated state to a treatment for dispersion.
Dependencies are inferred from the claim text.