Nippon Shokubai Co., Ltd.

Dai Nippon Printing Co., Ltd.

Minoru Yamaguchi

Kenichi Ueda

Kazumi Fujioka

Tomomasa Kaneko

Shinji Hayashi

Masatoshi Yoshida

Shunsuke Sega

Tomonobu Sumino

Tomomi Makino

Masahiro Tatsuzawa

Hideo Asano

Kiyoshi Ito

Fumioki Shimoyama

Shingo Kataoka

Osamu Koso

Kazuhide Kuroda

Provided is an alkali-soluble maleimide-based copolymer which comprises, as essential constituents, 5 to 50% by mass of a maleimide monomer unit which is at least one unit selected from the group consisting of a N-cyclohexylmaleimide monomer unit, a N-benzylmaleimide monomer unit and a substituted N-benzylmaleimide monomer unit, 8 to 30% by mass of the (meth)acrylic acid monomer unit and 30 to 87% by mass of a (meth)acrylic acid ester monomer unit and which satisfies the condition represented by the formula:0.4&#xd7;0.5&#xd7;10where X is the content, in % by mass, of the N-cyclohexylmaleimide monomer unit, the N-benzylmaleimide monomer unit and the substituted N-benzylmaleimide monomer unit and Y is the content, in % by mass, of the (meth)acrylic acid monomer unit. Also provided are a color filter and a liquid crystal display which are formed by using the ionizing radiation-curable resin composition.

Alkali-soluble maleimide copolymer and liquid crystal display comprising the same

The present invention provides: a photosensitive resin composition, which can form uniform coating films having higher coating film strength without causing surface contamination, decrease of evenness of coating films, decrease of film thickness, and coloring by decomposition in heat treatment of subsequent steps, and has good sensitivity of exposure. The photosensitive resin composition comprises a lactone-ring-containing polymer (A) as an essential component, wherein: the lactone-ring-containing polymer (A) is obtained by carrying out polymerization of comonomers and lactonization at the same time wherein the comonomers include a 2-(hydroxyalkyl)acrylate ester and an acidic-group-containing monomer; and the lactone-ring-containing polymer (A) is obtained by almost quantitatively carrying out lactonization of a 2-(hydroxyalkyl)acrylate ester structural unit.

Photosensitive resin composition, its use, lactone-ring-containing polymer, and production process therefor

The present invention provides: a transparent heat-resistant resin that has a small amount of both the residual maleimide monomer and the maleimide monomer generated by heating in order to carry out such as a mold processing, and further, is excellent in heat resistance and yellowish little; a production process therefor; and a resin composition utilizing this resin. The transparent heat-resistant resin, according to the present invention, is obtained by a process including the step of running a polymerization of comonomers including a maleimide monomer and a methacrylic acid ester monomer, wherein the amount of the residual maleimide monomer in the resin is not more than 10&times; ppm when the amount of a structural unit derived from the maleimide monomer is X weight % in the resin, and the amount of the generated maleimide monomer by heating the resin at 240&deg; C. for 10 minutes is not more than 10&times; ppm when the amount of a structural unit derived from the maleimide monomer is X weight % in the resin. In addition, the production process for a transparent heat-resistant resin, according to the present invention, comprises the step of running a polymerization of comonomers including a maleimide monomer and a methacrylic acid ester monomer in order to obtain a transparent resin having heat resistance, wherein an acidic substance is made to exist with a sulfur chain-transfer agent in the polymerization system during the polymerization.

Transparent heat-resistant resin and production process therefor

Thermoplastic copolymer and process for the production thereof

A maleimide-based copolymer is provided, in which the content of compound (X) shown by the formula (I) is controlled in a range which does not adversely affect the physical properties of the copolymer. Such a copolymer includes an aromatic vinyl-based monomer unit and a maleimide-based monomer unit as essential components, proportion y of the maleimide-based monomer unit in structure is 35 to 65% by weight, and a content of the compound (X) is 3% or less and also, does not exceed a numeral value of 0.06y. The copolymer is prepared by radical copolymerization which is carried out by supplying gradually an aromatic vinyl-based monomer and a maleimide-based monomer into a reaction vessel under a condition of keeping these monomers separated without mixing together beforehand. ##STR1##

Maleimide-based copolymer, process for producing it, and thermoplastic

Growing community of inventors

Ibaraki, Japan

Minoru Yamaguchi