Mitsubishi Rayon Company, Limited

Nippon Paint Compnay, Ltd.

Norihisa Osaka

Yukihiro Ikegami

Kazuo Kishida

Hitoshi Kodama

Kazumasa Kamada

Masanori Itakura

Hideo Nakamoto

Toshitaka Kawanami

Masahiro Kaneda

Yasushi Umeda

Fumio Ide

Shuichiro Tokuda

Kazuo Ueda

Masatoshi Takesue

Kazumasa Kamata

Shoji Imao

Masataka Inomoto, Deceased

Kiichiro Ishiguro

Kinuko Suzuki

A phosphor paste composition is disclosed, which uses as an organic binder an acrylic polymer obtained by copolymerizing an alkyl methacrylate as a principal component with a specific amount of at least one monomer selected from unsaturated carboxylic acids and hydroxyalkyl (meth)acrylates. Also disclosed is a phosphor paste composition making use of a phosphor having a volume average particle size in a range of 1-7 .mu.m, with particles having a particle size of 1-9 .mu.m accounting for at least 60 wt.%. These phosphor paste compositions have excellent firing characteristics and provide phosphor coatings excellent in both light-emitting characteristics and resolution.

Phosphor paste compositions and phosphor coatings obtained therefrom

Method for manufacturing color phosphor surface

Disclosed is a water developable photosensitive resin composition suitable for a printing plate, which has excellent dimensional stability and excellent chemical and physical properties. The photosensitive resin composition comprises;

Water developable photosensitive resin composition

A process is described for the formation of an undercoat which is in turn useful in forming a CRT metal back layer. According to the process, a pretreatment composition is coated on a glass panel having a fluorescent layer overlaid thereon, so that a water film is formed. The pretreatment composition is composed of 2-20 wt. % of an alkyl monoalcohol having a C.sub.1-3 alkyl group, 0.05-1 wt. % of a water-soluble, high molecular compound and 79-97.95 wt. % of water. An undercoating composition is then coated on the water film by a wet-on-wet coating method, whereby a coating layer is formed. The undercoating composition is composed of 1-7 parts by weight of an acrylic resin, which has been obtained by polymerizing 90-100 wt. % of an alkyl methacrylate having a C.sub.1-4 alkyl group other than tertbutyl methacrylate and 0-10 wt. % of an ethylenically unsaturated monomer copolymerizable therewith, and 99-93 parts by weight of a solvent containing at least 80 wt. % of toluene. The sum of the acrylic resin and the solvent is 100 parts by weight. The water film and the coating layer are dried to form the undercoat.

Process for the formation of undercoat for CRT metal back layer

A phosphor paste composition is disclosed, which uses as an organic binder an acrylic polymer obtained by copolymerizing an alkyl methacrylate as a principal component with a specific amount of at least one monomer selected from unsaturated carboxylic acids and hydroxyalkyl (meth)acrylates. Also disclosed is a phosphor paste composition making use of a phosphor having a volume average particle size in a range of 1-7 .mu.m, with particles having a particle size of 1-9 .mu.m accounting for at least 60 wt. %. These phosphor paste compositions have excellent firing characteristics and provide phosphor coatings excellent in both light-emitting characteristics and resolution.

Acrylic phosphor paste compositions and phosphor coatings obtained

An undercoat composition for ceramic flame spraying and composite molded articles produced using the undercoat composition are disclosed. The undercoat composition comprises an inorganic filler component having complex irregularities in the surface thereof and an organic binder component. The composite molded articles comprises a substrate, a ceramic flame sprayed coating, and an intermediate layer between the substrate and the ceramic flame sprayed coating, said intermediate layer being made of the above undercoat composition. The present undercoat composition permits good ceramic flame spraying, and there can be obtained composite molded articles having good impact resistance and environmental resistance.

Composite molded articles having specified undercoat composition

A vinyl chloride polymer having an excellent workability, lubricating property, and gelling property comprises (1) from 80 to 99.95 weight % of a polymeric ingredient (I) consisting of polyvinyl chloride and/or a copolymer of 80 weight % or more of vinyl chloride with 20 weight % or less of another comonomer and (2) from 0.05 to 20 weight % of a polymeric ingredient (II) consisting of at least one three-stage emulsion polymerization product prepared by first polymerizing, in the presence of a polymeric component (a) consisting of polymethyl methacrylate and/or a copolymer of 50 weight % or more of methyl methacrylate and 50 weight % or less of another comonomer, from 40 to 70 parts by weight of a first monomeric component (b) consisting of an alkyl acrylate (C.sub.1-18) and/or benzyl acrylate or a mixture of 30 weight % or more of an alkyl acrylate (C.sub.1-18) and/or benzyl acrylate with 70 weight % or less of an alkyl methacrylate (C.sub.1-18) and/or benzyl methacrylate under such a polymerization condition that when the monomeric componet (b) alone is polymerized, the resultant product exhibits a reduced viscosity of 1 or less in a concentration of 0.1 g/100 ml of chloroform of 25.degree. C. and by second polymerizing, in the presence of the first polymerization product, from 5 to 40 parts by weight of a second monomeric component (c) consisting of methyl methacrylate or a mixture of 50 weight % or more of methyl methacrylate and 50 weight % or less of another comonomer, the sum of the components (a), (b), and (c) being 100 parts by weight and the preparation of the polymeric component (a) and the first and second polymerizations being carried out by means of an emulsion polymerization method in the presence of a chain transfer agent.

Vinyl chloride polymer composition

A composition with high impact resistance and little fish eyes content, comprising 97 to 60 parts by weight of a polyvinyl chloride-base resin and 3 to 40 parts by weight of a graft copolymer obtained by the three-stage graft-polymerization of 65 to 25 parts by weight of a monomer combination (B) comprising 12 to 57% by weight of methyl methacrylate, 1 to 24% by weight of at least one of alkyl acrylates having a C.sub.1-8 -alkyl group, 80 to 40% by weight of styrene and 0 to 3% by weight of a polyfunctional crosslinking agent having one or more alkyl groups in the molecule onto 35 to 75 parts by weight of a butadiene-base elastomer (A) containing 30% by weight or more of 1,3-butadiene units, said three-stage graft polymerization being carried out in the following way: at first at least one member selected from the group consisting of electrolytes and carboxyl-containing polymer latices is added to the reaction system; then in the first stage monomer mixture consisting of major amount of methyl methacrylate and minor amount of an alkyl acrylate or acrylates, which has a proportion of 50 to 90% by weight based on total weight of methyl methacrylate and alkyl acrylate or acrylates, and, if included in said monomer combination, a polyfunctional crosslinking agent are graft-polymerized; in the second stage, styrene is graft-polymerized; and in the third stage, the remaining 10 to 50% by weight of methyl methacrylate and an alkyl acrylate or acrylates are graft-polymerized.

Polyvinyl chloride-base resin and multistage graft resin composition

Provided are vinyl chloride polymer compositions having a composite elastomer modifier incorporated therein, whereby said polymers exhibit on excellent balance of the physical properties of thermal resistance, transparency, and impact resistance. The composite elastomer modifier is comprised of (A) 20 to 60% by weight of a graft copolymer prepared by grafting methyl methacrylate and styrene onto a butadiene rubber in a specified sequential multi-stage polymerization procedure of (B) 40 to 80% by weight of a copolymer comprised of .alpha.-methylstyrene, methyl methacrylate and acrylonitrile. The composite elastomer modifier may be prepared by either blending graft copolymer (A) with copolymer (B) or by polymerizing a monomer charge of copolymer (B) in the presence of graft copolymer (A).

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Nagoya, Japan

Norihisa Osaka