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AssigneeMitsubishi Chemical Corporation
InventorsChikako Ikeda, Hiroyuki Sato
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According to the present invention, there is provided an adhesive resin composition comprising 50-99% by weight of a modified hydrogenated block copolymer (a), which is obtained by hydrogenating a block copolymer of a vinyl aromatic compound and a conjugated diene compound followed by modification with an unsaturated carboxylic acid or a derivative thereof, wherein the content of the unsaturated carboxylic acid or the derivative thereof is 0.01-20% by weight, and 1-50% by weight of a tackifier (b), and a laminate and an oriented film wherein such adhesive resin composition is used for the adhesive layer. The adhesive resin composition of the present invention is useful in various fields such as film packaging of foods and pharmaceutical preparations.
An adhesive resin composition consisting essentially of 50-99% by weight of a modified hydrogenated block copolymer (a), which is obtained by hydrogenating a block copolymer consisting essentially of a vinyl aromatic compound and a conjugated diene compound followed by modification by graft polymerization with an unsaturated carboxylic acid or anhydride thereof, wherein the content of the unsaturated carboxylic acid or anhydride thereof is 0.01-20% by weight, and 1-50% by weight of a tackifier (b).
An adhesive resin composition consisting essentially of 50-99% by weight of a modified hydrogenated block copolymer (a), which is obtained by hydrogenating a block copolymer consisting essentially of a vinyl aromatic compound and a conjugated diene compound followed by modification by graft polymerization with an unsaturated carboxylic acid or anhydride thereof, wherein the content of the unsaturated carboxylic acid or anhydride thereof is 0.01-20% by weight, 1-50% by weight of a tackifier (b), and an ethylenic polymer (c) having a melt flow rate of 0.05-50 g/10 minutes and a density of 0.850-0.950 g/cm3 in an amount of 10-1000 parts by weight per 100 parts by weight of the total of the modified hydrogenated block copolymer (a) and the tackifier (b), said ethylenic polymer (c) being an ethylene homopolymer or an ethylene-α-(C3-20)alkene copolymer.
An adhesive resin composition consisting essentially of a modified hydrogenated block copolymer (a) in an amount of not less than 1% by weight and less than 50% by weight, which is obtained by hydrogenating a block copolymer consisting essentially of a vinyl aromatic compound and a conjugated diene compound followed by modification by graft polymerization with an unsaturated carboxylic acid or anhydride thereof, wherein the content of the unsaturated carboxylic acid or the anhydride thereof is 0.01-20% by weight, a tackifier (b) in an amount of more than 50% by weight and not more than 99% by weight, and an ethylenic polymer (c) having a melt flow rate of 0.05-50 g/10 minutes and a density of 0.850-0.950 g/cm3 in an amount of 10-1000 parts by weight per 100 parts by weight of the total of the modified hydrogenated block copolymer (a) and the tackifier (b), said ethylenic polymer (c) being an ethylene homopolymer or an ethylene-α-(C3-20)alkene copolymer.
A method of producing a laminate comprising coextrusion laminating an adhesive layer (layer A) consisting essentially of 50-99% by weight of a modified hydrogenated block copolymer (a), which is obtained by hydrogenating a block copolymer consisting essentially of a vinyl aromatic compound and a conjugated diene compound followed by modification by graft polymerization with an unsaturated carboxylic acid or anhydride thereof, wherein the content of the unsaturated carboxylic acid or anhydride thereof is 0.01-20% by weight, and 1-50% by weight of a tackifier (b), and a thermoplastic resin layer (layer B) comprising a thermoplastic resin which is selected from the group consisting of ethylene-vinyl acetate copolymer saponified products having an ethylene content of 15-65 mol %, and a saponification degree of not less than 90%, polyamide resins, polyolefin resins, styrene resins, polyester resins, acrylic resins and polycarbonate resins, said layer B being adhered to on a resin film, sheet or metal by said adhesive layer A.
A method of producing a laminate comprising extrusion laminating an adhesive layer (layer A) consisting essentially of a modified hydrogenated block copolymer (a) in an amount of not less than 1% by weight and less than 50% by weight, which is obtained by hydrogenating a block copolymer consisting essentially of a vinyl aromatic compound and a conjugated diene compound followed by modification by graft polymerization with an unsaturated carboxylic acid or anhydride thereof, wherein the content of the unsaturated carboxylic acid or anhydride thereof is 0.01-20% by weight, a tackifier (b) in an amount of more than 50% by weight and not more than 99% by weight, and an ethylenic polymer (c) having a melt flow rate of 0.05-50 g/10 minutes and a density of 0.850-0.950 g/cm3 in an amount of 10-1000 parts by weight per 100 parts by weight of the total of the modified hydrogenated block copolymer (a) and the tackifier (b), said ethylenic polymer (c) being an ethylene homopolymer or an ethylene-α-(C3-20)alkene copolymer, and a thermoplastic resin layer (layer B) comprising a thermoplastic resin which is selected from the group consisting of ethylene-vinyl acetate copolymer saponified products having an ethylene content of 15-65 mol %, and a saponification degree of not less than 90%, polyamide resins, polyolefin resins, styrene resins, polyester resins,—acrylic resins—and polycarbonate resins, said layer B being adhered to on a resin film, sheet or metal by said adhesive layer A.
Dependencies are inferred from the claim text.