Takeda Chemical Industries, Inc.

Kuraray Co., Ltd.

Yuzo Furukawa

Masamitsu Nakabayashi

Teruo Hori

Takuji Okaya

Fumihiro Doura

Toshiyuki Akasawa

Akira Tashiro

A heat adherable resin composition which comprises (a) a carboxyl-modified resin obtained by the reaction of a partially saponified product of an ethylene-vinyl acetate copolymer having a vinyl acetate content of 10 to 55 weight percent with an unsaturated carboxylic acid or dicarboxylic acid anhydride and (b) a monoolefin-unsaturated carboxylic acid copolymer or metal salt thereof is valuable as an adhesive layer for the heat sealable sheet made of aluminum foil which is used in the food industry in sealing and packaging the mouths of glass containers.

Heat adherable resin compositions and aluminum sheet laminated with the

Laminated article and process for production thereof

Disclosed are a colorless and transparent carboxyl-modified resin of saponified ethylene-vinyl acetate copolymers prepared from an ethylene-vinyl acetate copolymer, the 1.0 mm-thick sheet therefrom having a total transmittance of more than 90%, a haze of less than 3% and a yellowness index of 3 and the preparation of the resin. The uses of the resin are also disclosed for laminated glass wherein the resin is used as an interlayer as well as for a solar cell module wherein the resin is used as a sealing material of a semiconductor element.

Resin from saponified ethylene-vinyl acetate copolymers, production and

Disclosed is an adhesive for bonding an ethylene/vinyl alcohol copolymer and polystyrene, which comprises a modified ethylene/vinyl acetate copolymer obtained by graft-copolymerizing a styrenic vinyl monomer and an .alpha.,.beta.-unsaturated carboxylic acid to an ethylene/vinyl acetate copolymer. A laminated article having the said adhesive as an interlayer and production thereof are also disclosed. The laminated article shows strong resistance to delamination and excels in processability. Therefore, the laminate is valuable as a deep-draw forming material with enhanced gas barrier properties for a preservation rigid container for foods.

Laminated article and production thereof

A spherical powder of a hydrolyzed ethylene-vinyl acetate copolymer or its carboxyl modified product, is prepared by a method which comprises mixing 100 parts by weight of (1) a hydrolyzed product of an ethylene-vinyl acetate copolymer having 5 to 50% by weight of vinyl acetate group content or (2) a carboxyl modified product of the aforementioned hydrolyzed product obtained by reacting said hydrolyzed product with an unsaturated carboxylic acid or cyclic acid anhydride, with 10 to 100 parts by weight of an organic solvent capable of dissolving said hydrolyzed product or its carboxyl modified product, the solvent being not freely miscible with water and having a boiling point of not lower than 80.degree. C., 300 to 1000 parts by weight of water and 0.1 to 10 parts by weight of an alkylphenol ethylene oxide adduct having an HLB value of 10 to 20, emulsifying said mixture while it is maintained at a temperature of not lower than the softening point of said hydrolyzed product or carboxyl modified product, and decreasing the temperature of the system under stirring down to not higher than said softening point. The resultant powder is virtually spherical in its particle form, the particles are of almost equal size, and their particle size distribution is such that not less than 70% fall between 70 and 300.mu.. Such spherical powder, when used in electrostatic coating, can provide beautiful coating films.

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Kawanishi, Japan

Yuzo Furukawa