Patent US4645695A successfully refreshed from Google Patents.
US4645695A
Expired / Lapsed
US
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Resinous composition and molded article and container made thereof
Assignee: Kuraray Co Ltd
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Filing: 1985-08-23
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Granted: 1987-02-24
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Expires: 2005-08-23
Abstract
Abstract A resinous composition which comprises (A) 95 to 50 parts by weight of a saponified product of ethylene-vinyl acetate copolymer and (B) 5 to 50 parts by weight of a product formed by modifying ethylene-vinyl carboxylate ester copolymer or ethylene-acrylate ester copolymer with an alpha , beta -unsaturated carboxylic acid or anhydride thereof. This resinous composition can be made by melt extrusion into a molded article which is superior in impact resistance to that formed from the component (A) alone. The resinous composition can also be made into an inner layer or interlayer of a laminated container. This container is suitable for bottles of foods and agricultural chemicals because of its outstanding impact resistance, organic solvent resistance, and oxygen barrier properties.
Inventors
- 👤 Taichi Negi
- 👤 Akihiko Kawasaki
- 👤 Kyoichiro Ikari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:10
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/30; B32B27/06; B32B27/08; C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L29/00; C08L29/02; C08L29/04; B32B2307/00; B32B2307/50; B32B2439/00; C08L51/00; C08L51/06; Y; Y10; Y10S; Y10S220/00; Y10S220/917; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/1397; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
101 words
A resinous composition which comprises (A) 95 to 50 parts by weight of a saponified product of ethylene-vinyl acetate copolymer containing 20 to 60 mol % of ethylene and having a degree of saponification greater than 95%, and (B) 5 to 50 parts by weight of a modified ethylene-vinyl carboxylate copolymer or a modified ethylene-acrylate copolymer, said copolymers each being modified by a C 3 -C 10 α,β-unsaturated carboxylic acid or anhydride thereof therewith, wherein each of said modified copolymers contain 60 to 85 mol% of ethylene and 0.01 to 3 mol% of an α,β-unsaturated carboxylic acid or an anhydride thereof.
Claim 2
Dependent Claim
101 words
A resinous composition which comprises (A) 95 to 50 parts by weight of a saponified product of ethylene-vinyl acetate copolymer containing 20 to 60 mol % of ethylene and having a degree of saponification greater than 95%, and (B) 5 to 50 parts by weight of a modified ethylene-vinyl carboxylate copolymer or a modified ethylene-acrylate copolymer, said copolymers each being modified by a C 3 -C 10 α,β-unsaturated carboxylic acid or anhydride thereof therewith, wherein each of said modified copolymers contain 60 to 85 mol% of ethylene and 0.01 to 3 mol% of an α,β-unsaturated carboxylic acid or an anhydride thereof.
Claim 3
Dependent Claim
94 words
A resinous composition as claimed in claim 1, wherein said modified ethylene-vinyl carboxylate copolymer or modified ethylene-acrylate copolymer contains 60 to 95 mol% of ethylene and 0.01 to 3 mol% of α,β-unsaturated carboxylic acid or anhydride thereof and has a melt index of Y g/10 min (190° C., 2160 g), where Y is the value that satisfies the following equation: 0.01·Z<Y<100(Z+10·X) where X is the mol% of α,β-unsaturated carboxylic acid or anhydride thereof, and Z is the melt index (2 g/10 min (190° C., 2160 g)) of the saponified product of ethylene-vinyl acetate copolymer.
Claim 4
Dependent Claim
34 words
A resinous composition as claimed in claim 1, wherein the vinyl carboxylate component is represented by the formula ##STR3## wherein R is a linear or branched alkyl group having 1 to 20 carbon atoms.
Claim 5
Dependent Claim
34 words
A resinous composition as claimed in claim 1, wherein the acrylate ester component is represented by the formula ##STR4## (where R' is a linear or branched alkyl group having 1 to 20 carbon atoms.)
Claim 6
Dependent Claim
111 words
A molded article having impact resistance produced by melt-molding a resinous composition which comprises (A) 95 to 50 parts by weight of a saponified product of ethylene-vinyl acetate copolymer containing 20 to 60 mol % of ethylene and having a degree of saponification greater than 95% and (B) 5 to 50 parts by weight of a modified ethylene-vinyl carboxylate copolymer or modified ethylene-acrylate copolymer, said copolymers each being modified by a C 3 -C 10 α,β-unsaturated carboxylic acid or anhydride thereof therewith, wherein each of said modified copolymers contain 60 to 85 mol % of ethylene and 0.01 to 3 mol % of an α,β-unsaturated carboxylic acid or an anhydride thereof.
Claim 7
Dependent Claim
111 words
A molded article having impact resistance produced by melt-molding a resinous composition which comprises (A) 95 to 50 parts by weight of a saponified product of ethylene-vinyl acetate copolymer containing 20 to 60 mol % of ethylene and having a degree of saponification greater than 95% and (B) 5 to 50 parts by weight of a modified ethylene-vinyl carboxylate copolymer or modified ethylene-acrylate copolymer, said copolymers each being modified by a C 3 -C 10 α,β-unsaturated carboxylic acid or anhydride thereof therewith, wherein each of said modified copolymers contain 60 to 85 mol % of ethylene and 0.01 to 3 mol % of an α,β-unsaturated carboxylic acid or an anhydride thereof.
Claim 8
Dependent Claim
94 words
A resinous composition as claimed in claim 5, wherein said modified ethylene-vinyl carboxylate copolymer or modified ethylene-acrylate copolymer contains 60 to 95 mol% of ethylene and 0.01 to 3 mol% of α,β-unsaturated carboxylic acid or anhydride thereof and has a melt index of Y g/10 min (190° C., 2160 g), where Y is the value that satisfies the following equation: 0.01·Z<Y<100(Z+10·X) where X is the mol% of α,β-unsaturated carboxylic acid or anhydride thereof, and Z is the melt index (2 g/10 min (190° C., 2160 g)) of the saponified product of ethylene-vinyl acetate copolymer.
Claim 9
Dependent Claim
34 words
A molded article as claimed in claim 5, wherein the vinyl carboxylate component is represented by the formula ##STR5## wherein R is a linear or branched alkyl group having 1 to 20 carbon atoms.
Claim 10
Dependent Claim
33 words
A molded article as claimed in claim 5, wherein the acrylate component is represented by the formula ##STR6## wherein R' is a linear or branched alkyl group having 1 to 20 carbon atoms.
Claim 11
Dependent Claim
17 words
A molded article as claimed in claim 5, which is produced by coextrusion with a thermoplastic resin.
Claim 12
Dependent Claim
25 words
A molded article as claimed in claim 9, wherein said thermoplastic resin is selected from polyethylene terephthalate, polyamide, polypropylene, polyethylene, polycarbonate, polystyrene, and polyvinyl chloride.
Claim 13
Dependent Claim
116 words
An impact resistant container of laminated structure formed by coextrusion of a resinous composition and one or more thermoplastic resins, said resinous composition comprising (A) 95 to 50 parts by weight of a saponified product of ethylene-vinyl acetate copolymer containing 20 to 60 mol % of ethylene and having a degree of saponification greater than 95% and (B) 5 to 50 parts by weight of a modified ethylene-vinyl carboxylate copolymer, said copolymers each being modified by a C 3 -C 10 α,β-unsaturated carboxylic acid or anhydride thereof therewith, wherein each of said modified copolymers contains 60 to 95 mol % ethylene and 0.01 to 3 mol % of an α,β-unsaturated carboxylic acid or an anhydride thereof.
Claim 14
Dependent Claim
116 words
An impact resistant container of laminated structure formed by coextrusion of a resinous composition and one or more thermoplastic resins, said resinous composition comprising (A) 95 to 50 parts by weight of a saponified product of ethylene-vinyl acetate copolymer containing 20 to 60 mol % of ethylene and having a degree of saponification greater than 95% and (B) 5 to 50 parts by weight of a modified ethylene-vinyl carboxylate copolymer, said copolymers each being modified by a C 3 -C 10 α,β-unsaturated carboxylic acid or anhydride thereof therewith, wherein each of said modified copolymers contains 60 to 95 mol % ethylene and 0.01 to 3 mol % of an α,β-unsaturated carboxylic acid or an anhydride thereof.
Claim 15
Dependent Claim
94 words
A resinous composition as claimed in claim 11, wherein said modified ethylene-vinyl carboxylate copolymer or modified ethylene-acrylate copolymer contains 60 to 95 mol% of ethylene and 0.01 to 3 mol% of α,β-unsaturated carboxylic acid or anhydride thereof and has a melt index of Y g/10 min (190° C., 2160 g), where Y is the value that satisfies the following equation: 0.01·Z<Y<100(Z+10·X) where X is the mol% of α,β-unsaturated carboxylic acid or anhydride thereof, and Z is the melt index (Z g/10 min (190° C., 2160 g)) of the saponified product of ethylene-vinyl acetate copolymer.
Claim 16
Dependent Claim
33 words
A container as claimed in claim 5, wherein the vinyl carboxylate component is represented by the formula ##STR7## wherein R is a linear or branched alkyl group having 1 to 20 carbon atoms.
Claim 17
Dependent Claim
32 words
A container as claimed in claim 5, wherein the acrylate component is represented by the formula ##STR8## wherein R' is a linear or branched alkyl group having 1 to 20 carbon atoms.
Claim 18
Dependent Claim
23 words
A container as claimed in claim 11, wherein the inner layer is the resinous composition and the outer layer is a thermoplastic resin.
Claim 19
Dependent Claim
31 words
A container as claimed in claim 11, wherein the interlayer is made of the resinous composition of claim 1 and the inner and outer layers are made of a thermoplastic resin.
Claim 20
Dependent Claim
24 words
A container as claimed in claim 11, wherein said thermoplastic resin is selected from polyethylene terephthalate, polyamide, polypropylene, polyethylene, polycarbonate, polystyrene, and polyvinyl chloride.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |