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AssigneeToyo Seikan Kaisha, Ltd.
InventorsSadao Hirata, Muneki Yamada, Akira Kishimoto
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A resinous composition excellent in processability and gas permeation resistance, which comprises (A) 30 to 98 % by weight of a crystalline polyolefin, (B) 2 to 70 % by weight of a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 25 to 75 mole % and a degree of saponification of at least 93 %, and (C) 0.5 to 15 parts by weight, per 100 parts by weight of said polyolefin and ethylene-vinyl acetate copolymer saponified product, of a thermoplastic polymer containing a carbonyl group in the main or side chain thereof, and a molded structure formed therefrom, which has a specific multi-layer structure and a high gas permeation resistance.
A resinous composition excellent in processability and gas permeation resistance, which comprises (A) 30 to 98% by weight of a crystalline polyolefin, (B) 2 to 70% by weight of a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 25 to 75 mole % and a degree of saponification of at least 93%, and (C) 0.5 to 15 parts by weight, per 100 parts by weight of said polyolefin and ethylenevinyl acetate copolymer saponified product, of a thermoplastic polymer selected from the group consisting of polymers composed of a monomer expressed by the following formula ##STR9## wherein R.sub.1 is a hydrogen atom or a lower alkyl group of up to 4 carbon atoms, and R.sub.2 is a hydrogen atom or an alkyl group of 1 to 12 carbon toms.
A resinous composition excellent in processability and gas permeation resistance which comprises (A) 30 to 98% by weight of a crystalline polyolefin, (B) 2 to 70% by weight of a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 25 to 75 mole % and a degree of saponification of at least 93%, and (C) 0.5 to 15 parts by weight, per 100 parts by weight of said polyolefin and ethylene-vinyl acetate copolymer saponified product, of a thermoplastic polymer selected from the group consisting of polymers composed of a monomer expressed by the following formula ##STR10## wherein R.sub.3 is a hydrogen atom, or an alkyl group of up to 4 carbon atoms or a phenyl group,
A resinous composition excellent in processability and gas permeation resistance, which comprises (A) 30 to 98% by weight of a crystalline polyolefin, (B) 2 to 70% by weight of a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 25 to 75 mole % and a degree of saponification of at least 93%, and (C) 0.5 to 15 parts by weight, per 100 parts by weight of said polyolefin and ethylene-vinyl acetate copolymer saponified product, of an ionomer having carbonyl groups in an amount of 120 to 1400 milliequivalents per 100 g of the ionomer.
A resinous composition excellent in processability and gas permeation resistance, which comprises (A) 30 to 98% by weight of a crystalline polyolefin, (B) 2 to 70% by weight of a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 25 to 75 mole % and a degree of saponification of at least 93%, and (C) 0.5 to 15 parts by weight, per 100 parts by weight of said polyolefin and ethylene-vinyl acetate copolymer saponified product, of a copolymer of maleic anhydride with other .alpha. ,.beta.-ethylenically unsaturated monomer free of a carbonyl group, said copolymer containing carbonyl groups in an amount of 120 to 1400 milliequivalents per 100 g of the polymer.
A resinous molded structure obtained by melt-extrusion molding a resinous composition which comprises (A) 30 to 98 % by weight of a crystalline polyolefin (B) 2 to 70% by weight of a saponified product of an ethylene-vinyl acetate copolymer having an ethylene content of 25 to 50 mole %, a degree of saponification of at least 99% and an intrinsic viscosity (.eta.), measured at 30.degree.C. in a mixed solvent of 85% by weight of phenol and 15% by weight of water, of from 0.07 to 0.17 l/g and (C) 0.5 to 15 parts by weight, per 100 parts by weight of said polyolefin and ethylene-vinyl acetate copolymer saponified product, of a thermoplstic polymer having carbonyl groups in an amount of 120 to 1400 milliequivalents per 100 g of the polymer (C), said thermoplastic polymer (C) being selected from the group consisting of
Dependencies are inferred from the claim text.