US5258233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester/polyamide blend having improved flavor retaining property and clarity
Assignee: Eastman Chemical Co
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Filing: 1992-04-02
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Granted: 1993-11-02
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Expires: 2012-04-02
Abstract
Abstract This invention relates to a polyester/polyamide blend having an excellent gas barrier property and an improved flavor retaining property and clarity. More particularly, the present invention relates to a polyethylene terephthalate/low molecular weight polyamide blend having an excellent gas barrier property, in which by reducing the concentration of acetaldehyde contained in the polyester, the storage property of a food or the like and the flavor-retaining property and fragrance retaining property are highly improved without producing haze.
Inventors
- 👤 David E. Mills
- 👤 Steven L. Stafford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:21
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; B; B65; B65D; B65D65/00; B65D65/38; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
126 words
A polyester composition having an improved flavor retaining property comprising: (A) 98.0 to 99.95 weight percent of a polyester which comprises (1) a dicarboxylic acid component comprising repeat units from at least 85 mole percent terephthalic acid; and (2) a diol component comprising repeat units from at least 85 mole percent ethylene glycol, based on 100 mole percent dicarboxylic acid and 100 mole percent diol; and (B) 2.0 to 0.05 weight percent of a polyamide selected from the group consisting of low molecular weight partially aromatic polyamides having a number average molecular weight of less than 15,000, low molecular weight aliphatic polyamides having a number average molecular weight of less than 7,000, and combinations thereof, wherein the combined weights of (A) and (B) total 100 percent.
Claim 2
Dependent Claim
126 words
A polyester composition having an improved flavor retaining property comprising: (A) 98.0 to 99.95 weight percent of a polyester which comprises (1) a dicarboxylic acid component comprising repeat units from at least 85 mole percent terephthalic acid; and (2) a diol component comprising repeat units from at least 85 mole percent ethylene glycol, based on 100 mole percent dicarboxylic acid and 100 mole percent diol; and (B) 2.0 to 0.05 weight percent of a polyamide selected from the group consisting of low molecular weight partially aromatic polyamides having a number average molecular weight of less than 15,000, low molecular weight aliphatic polyamides having a number average molecular weight of less than 7,000, and combinations thereof, wherein the combined weights of (A) and (B) total 100 percent.
Claim 3
Dependent Claim
120 words
A polyester composition having an improved flavor retaining property comprising: (A) 98.0 to 99.95 weight percent of a polyester which comprises (1) a dicarboxylic acid component consisting essentially of repeat units from terephthalic acid, and (2) a diol component consisting essentially of repeat units from ethylene glycol, based on 100 mole percent dicarboxylic acid and 100 mole percent diol; and (B) 2.0 to 0.05 weight percent of a polyamide selected from the group consisting of low molecular weight partially aromatic polyamides having a number average molecular weight of less than 15,000, low molecular weight aliphatic polyamides having a number average molecular weight of less than 7,000, and combinations thereof, wherein the combined weights of (A) and (B) total 100 percent.
Claim 4
Dependent Claim
120 words
A polyester composition having an improved flavor retaining property comprising: (A) 98.0 to 99.95 weight percent of a polyester which comprises (1) a dicarboxylic acid component consisting essentially of repeat units from terephthalic acid, and (2) a diol component consisting essentially of repeat units from ethylene glycol, based on 100 mole percent dicarboxylic acid and 100 mole percent diol; and (B) 2.0 to 0.05 weight percent of a polyamide selected from the group consisting of low molecular weight partially aromatic polyamides having a number average molecular weight of less than 15,000, low molecular weight aliphatic polyamides having a number average molecular weight of less than 7,000, and combinations thereof, wherein the combined weights of (A) and (B) total 100 percent.
Claim 5
Dependent Claim
98 words
A polyester composition having improved clarity comprising: (A) 98.0 to 99.95 weight percent of a polyester which comprises (1) a dicarboxylic acid component comprising repeat units from at least 85 mole percent terephthalic acid; and (2) a diol component comprising repeat units from at least 85 mole percent ethylene glycol, based on 100 mole percent dicarboxylic acid and 100 mole percent diol; and (B) 2.0 to 0.05 weight percent of a low molecular weight partially aromatic polyamide having a number average molecular weight of less than 15,000, wherein the combined weights of (A) and (B) total 100 percent.
Claim 6
Dependent Claim
98 words
A polyester composition having improved clarity comprising: (A) 98.0 to 99.95 weight percent of a polyester which comprises (1) a dicarboxylic acid component comprising repeat units from at least 85 mole percent terephthalic acid; and (2) a diol component comprising repeat units from at least 85 mole percent ethylene glycol, based on 100 mole percent dicarboxylic acid and 100 mole percent diol; and (B) 2.0 to 0.05 weight percent of a low molecular weight partially aromatic polyamide having a number average molecular weight of less than 15,000, wherein the combined weights of (A) and (B) total 100 percent.
Claim 7
Dependent Claim
131 words
A heat molded or draw formed plastic article composed of a thermoplastic polyester composition comprising: (A) 98.0 to 99.95 weight percent of a polyester which comprises (1) a dicarboxylic acid component comprising repeat units from at least 85 mole percent terephthalic acid; and (2) a diol component comprising repeat units from at least 85 mole percent ethylene glycol, based on 100 mole percent dicarboxylic acid and 100 mole percent diol; and (B) 2.0 to 0.05 weight percent of a polyamide selected from the group consisting of low molecular weight partially aromatic polyamides having a number average molecular weight of less than 15,000, low molecular weight aliphatic polyamides having a number average molecular weight of less than 7,000, and combinations thereof, wherein the combined weights of (A) and (B) total 100 percent.
Claim 8
Dependent Claim
131 words
A heat molded or draw formed plastic article composed of a thermoplastic polyester composition comprising: (A) 98.0 to 99.95 weight percent of a polyester which comprises (1) a dicarboxylic acid component comprising repeat units from at least 85 mole percent terephthalic acid; and (2) a diol component comprising repeat units from at least 85 mole percent ethylene glycol, based on 100 mole percent dicarboxylic acid and 100 mole percent diol; and (B) 2.0 to 0.05 weight percent of a polyamide selected from the group consisting of low molecular weight partially aromatic polyamides having a number average molecular weight of less than 15,000, low molecular weight aliphatic polyamides having a number average molecular weight of less than 7,000, and combinations thereof, wherein the combined weights of (A) and (B) total 100 percent.
Claim 9
Dependent Claim
32 words
The plastic article according to claim 4 wherein the dicarboxylic acid component consists essentially of repeat units from terephthalic acid, and the diol component consists essentially of repeat units from ethylene glycol.
Claim 10
Dependent Claim
32 words
The composition according to claim 1 wherein said low molecular weight partially aromatic polyamide is selected from the group consisting of poly(m-xylylene adipamide), poly(hexamethylene isophthalamide), poly(hexamethylene adipamide-co-isophthalamide), poly(hexamethylene adipamide-co-terephthalamide), and poly(hexamethylene isophthalamide-co-terephthalamide).
Claim 11
Dependent Claim
17 words
The composition according to claim 6 wherein said low molecular weight partially aromatic polyamide is poly(m-xylylene adipamide).
Claim 12
Dependent Claim
24 words
The composition according to claim 1 wherein said low molecular weight aliphatic polyamide is selected from the group consisting of poly(hexamethylene adipamide) and poly(caprolactam).
Claim 13
Dependent Claim
16 words
The composition according to claim 8 wherein said low molecular weight aliphatic polyamide is poly(hexamethylene adipamide).
Claim 14
Dependent Claim
32 words
The article according to claim 4 wherein said low molecular weight partially aromatic polyamide is selected from the group consisting of poly(m-xylylene adipamide), poly(hexamethylene isophthalamide), poly(hexamethylene adipamide-co-isophthalamide), poly(hexamethylene adipamide-co-terephthalamide), and poly(hexamethylene isophthalamide-co-terephthalamide)
Claim 15
Dependent Claim
17 words
The article according to claim 10 wherein said low molecular weight partially aromatic polyamide is poly(m-xylylene adipamide).
Claim 16
Dependent Claim
24 words
The article according to claim 4 wherein said low molecular weight aliphatic polyamide is selected from the group consisting of poly(hexamethylene adipamide) and poly(caprolactam).
Claim 17
Dependent Claim
16 words
The article according to claim 12 wherein said low molecular weight aliphatic polyamide is poly(hexamethylene adipamide).
Claim 18
Dependent Claim
41 words
The composition according to claim 1 further comprising an additive selected from the group consisting of crystallization aids, impact modifiers, surface lubricants, denesting agents, stabilizers, antioxidants, ultraviolet light absorbing agents, metal deactivators, colorants, nucleating agents, phosphate stabilizers, processing aids and fillers.
Claim 19
Dependent Claim
12 words
The composition according to claim 14 wherein the nucleating agent is polyethylene.
Claim 20
Dependent Claim
12 words
The composition according to claim 14 wherein the colorant is titanium dioxide.
Claim 21
Dependent Claim
12 words
The composition according to claim 14 wherein the colorant is carbon black.
Claim 22
Dependent Claim
41 words
The article according to claim 4 further comprising an additive selected from the group consisting of crystallization aids, impact modifiers, surface lubricants, denesting agents, stabilizers, antioxidants, ultraviolet light absorbing agents, metal deactivators, colorants, nucleating agents, phosphate stabilizers, processing aids and fillers.
Claim 23
Dependent Claim
12 words
The article according to claim 17 wherein the nucleating agent is polyethylene.
Claim 24
Dependent Claim
12 words
The article according to claim 17 wherein the colorant is titanium dioxide.
Claim 25
Dependent Claim
12 words
The composition according to claim 17 wherein the colorant is carbon black.
Claim 26
Dependent Claim
11 words
The article according to claim 17 wherein the colorant is 1-cyano-6-(4-(2-hydroxyethyl)anilino)-3-methyl-3H-dibenzo(F,I,J)isoquinoline-2,7-dione.
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| 3.5 Years (Year 4) | 1996-11-01 | 1997-05-03 | 1997-11-02 | $2000.00 | Window Closed / Lapsed |
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