US4837115A
Expired / Lapsed
US
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Thermoplastic polyester composition having improved flavor-retaining property and vessel formed therefrom
Assignee: Toyo Seikan Group Holdings Ltd
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Filing: 1987-07-30
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Granted: 1989-06-06
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Expires: 2007-07-30
Abstract
Abstract In a vessel composed of a thermoplastic polyester such as polyethylene terephthalate, by incorporating a predetermined amount of a terminal amino group-containing polyamide or an amino group-containing compound into the polyester, acetaldehyde formed in the vessel wall can be effectively caught.
Inventors
- 👤 Reiko Igarashi
- 👤 Yoshihiko Watanabe
- 👤 Sadao Hirata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:47
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/02; B65D1/0207; B65D1/0215; B29; B29C; B29C49/00; B29C49/0005; C; C08; C08L; C08L67/00; C08L67/02; B29C49/42; B29C49/78; B29C2049/7879; B29C2949/00; B29C2949/20; B29C2949/22; B29C2949/24; B29C2949/26; B29C2949/28; B29C2949/30; B29C2949/3008; B29C2949/3012; B29C2949/3016; B29C2949/302; B29C2949/3024; B29C2949/3026; B29C2949/3028; B29C2949/3032; B29C2949/3034; B29C2949/3036; B29C2949/3041; B29C2949/3056; B29C49/08; B29C49/087; B29K; B29K2067/00; B29K2105/00; B29K2105/0002; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1397; Y10T428/31504; Y10T428/31725; Y10T428/31736; Y10T428/31786
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
85 words
A heat-molded or draw-formed plastic vessel composed of a thermoplastic polyester composition comprising (A) a thermoplastic polyester having ethylene terephthalate units and (B) 3×10 -7 to 10.0% by weight, based on the polyester, of a thermoplastic polyamide having a terminal amino group at a concentration of 0.05 to 50 millimoles per 100 g of the resin, said thermoplastic polyamide being a polymerized fatty acid polyamide obtained by polycondensation of (i) a polymerized fatty acid formed by polymerizing an unsaturated fatty acid with (ii) a diamine.
Claim 2
Dependent Claim
85 words
A heat-molded or draw-formed plastic vessel composed of a thermoplastic polyester composition comprising (A) a thermoplastic polyester having ethylene terephthalate units and (B) 3×10 -7 to 10.0% by weight, based on the polyester, of a thermoplastic polyamide having a terminal amino group at a concentration of 0.05 to 50 millimoles per 100 g of the resin, said thermoplastic polyamide being a polymerized fatty acid polyamide obtained by polycondensation of (i) a polymerized fatty acid formed by polymerizing an unsaturated fatty acid with (ii) a diamine.
Claim 3
Dependent Claim
16 words
A vessel as set forth in claim 1, wherein the thermoplastic polyester (A) is polyethylene terephthalate.
Claim 4
Dependent Claim
57 words
A vessel as set forth in claim 1, wherein the thermoplastic polyester (A) is a copolyester comprising in the polymer chain a terephthalic acid component and an isophthalic acid component at a molar ratio of from 95/5 to 5/95 and an ethylene glycol component and a bis(2-hydroxyethoxy)benzene component at a molar ratio of from 99.999/0.001 to 2.0/98.0.
Claim 5
Dependent Claim
30 words
A vessel as set forth in claim 1, wherein the polyamide (B) is incorporated in an amount of 5×10 -7 to 10.0% by weight based on the thermoplastic polyester (A).
Claim 6
Dependent Claim
30 words
A vessel as set forth in claim 1, wherein the polyamide (B) is incorporated in an amount of 5×10 -4 to 5.0% by weight based on the thermoplastic polyester (A).
Claim 7
Dependent Claim
29 words
A vessel as set forth in claim 1, wherein the terminal amino group concentration in the polyamide (B) is 0.1 to 40 millimoles per 100 g of the resin.
Claim 8
Dependent Claim
26 words
A vessel as set forth in claim 3, which is a multi-layer vessel comprising a layer of said thermoplastic polyester composition as a gas barrier layer.
Claim 9
Dependent Claim
33 words
A vessel as set forth in claim 7, which is obtained by forming a laminate having a layer of said thermoplastic polyester composition by co-injection molding and molding the laminate into a vessel.
Claim 10
Dependent Claim
23 words
A vessel as set forth in claim 1, wherein said polymerized fatty acid polyamide is a polyamide of dimerized linoleic acid with hexamethylene-diamine.
Claim 11
Dependent Claim
61 words
A polyester vessel having an improved flavor-retaining property, which is composed of a resin composition comprising (A) a thermoplastic polyester and (C) 5×10 - to 3.0% by weight, based on the polyester, of a primary amino group-containing compound having a molecular weight of at least 100, said compound being selected from the group consisting of polyoxyethylene diamine, spiroacetal diamine and spiroguanamine.
Claim 12
Dependent Claim
61 words
A polyester vessel having an improved flavor-retaining property, which is composed of a resin composition comprising (A) a thermoplastic polyester and (C) 5×10 - to 3.0% by weight, based on the polyester, of a primary amino group-containing compound having a molecular weight of at least 100, said compound being selected from the group consisting of polyoxyethylene diamine, spiroacetal diamine and spiroguanamine.
Claim 13
Dependent Claim
41 words
A polyester vessel as set forth in claim 10, wherein the amino group-containing compound (C) is a compound having a molecular weight of at least 100 and containing a primary amino group at a concentration of 0.05 to 3000 meq/100 g.
Claim 14
Dependent Claim
16 words
A vessel as set forth in claim 10, wherein the thermoplastic polyester (A) is polyethylene terephthalate.
Claim 15
Dependent Claim
56 words
A vessel as set forth in claim 10, wherein the thermoplastic polyester (A) is a copolyester comprising in the polymer chain a terephthalic acid component and isophthalic acid component at a molar ratio of from 95/5 to 5/95 and an ethylene glycol component and a bis(2-hydroxyethoxy)benzene component at a molar ratio of from 99.999/0.001 to 2.0/98.0.
Claim 16
Dependent Claim
26 words
A polyester vessel as set forth in claim 13, which is a multi-layer vessel comprising a layer of said resin composition as a gas barrier layer.
Claim 17
Dependent Claim
33 words
A polyester vessel as set forth in claim 10, which is obtained by forming a laminate having a layer of said resin composition by co-injection molding and molding the laminate into a vessel.
Claim 18
Independent Claim
93 words
A method for reducing the acetaldehyde concentration in a heat-molded polyester vessel, which comprises dry-blending a thermoplastic polyester with 3×10 - to 10.0% by weight, based on the polyester, of a thermoplastic polyamide having a terminal amino group at a concentration of 0.05 to 50 millimoles per 100 g of the resin, melt-kneading the composition and thermoforming the melt-kneaded composition into a vessel, wherein said thermoplastic polyamide is a polymerized fatty acid polyamide obtained by polycondensation of (i) a polymerized fatty acid formed by polymerizing an unsaturated fatty acid with (ii) a diamine.
Claim 19
Independent Claim
93 words
A method for reducing the acetaldehyde concentration in a heat-molded polyester vessel, which comprises dry-blending a thermoplastic polyester with 3×10 - to 10.0% by weight, based on the polyester, of a thermoplastic polyamide having a terminal amino group at a concentration of 0.05 to 50 millimoles per 100 g of the resin, melt-kneading the composition and thermoforming the melt-kneaded composition into a vessel, wherein said thermoplastic polyamide is a polymerized fatty acid polyamide obtained by polycondensation of (i) a polymerized fatty acid formed by polymerizing an unsaturated fatty acid with (ii) a diamine.
Claim 20
Independent Claim
70 words
A method for reducing the acetaldehyde concentration in a heat-molded polyester vessel, which comprises dry-blending a thermoplastic polyester with 5×10 -7 to 3.0% by weight, based on the polyester, of a primary amino group-containing compound having a molecular weight of at least 100, melt-kneading the composition and thermoforming the melt-kneaded composition into a vessel, wherein said compound is selected from the group consisting of polyoxyethylene diamine, spiroacetal diamine and spiroguanamine.
Claim 21
Independent Claim
70 words
A method for reducing the acetaldehyde concentration in a heat-molded polyester vessel, which comprises dry-blending a thermoplastic polyester with 5×10 -7 to 3.0% by weight, based on the polyester, of a primary amino group-containing compound having a molecular weight of at least 100, melt-kneading the composition and thermoforming the melt-kneaded composition into a vessel, wherein said compound is selected from the group consisting of polyoxyethylene diamine, spiroacetal diamine and spiroguanamine.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |