US5446079A
Expired / Lapsed
US
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Aliphatic-aromatic copolyesters and cellulose ester/polymer blends
Assignee: Eastman Chemical Co
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Filing: 1993-12-07
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Granted: 1995-08-29
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Expires: 2013-12-07
Abstract
Abstract This invention relates to binary blends of cellulose esters and aliphatic-aromatic copolyesters, cellulose esters and aliphatic polyesters as well as ternary blends of cellulose esters and/or aliphatic polyesters and/or aliphatic-aromatic copolyesters and/or polymeric compounds as well as fibers, molded objects, and films prepared therefrom.
Inventors
- 👤 Charles M. Buchanan
- 👤 Robert M. Gardner
- 👤 Alan W. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:37
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/08; C08L1/10; C08L67/00; A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/225; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08L1/14; C08L67/02; C08L67/04; C08L2201/00; C08L2201/06; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
147 words
A linear, random, semicrystalline aliphatic-aromatic copolyester which has an inherent viscosity of about 0.5 to 1.8 deciliters/gram as measured at a temperature of 25° C. for a 0.5 g sample in 100 mL of a 60/40 parts by weight solution of phenol/tetrachloroethane wherein the aliphatic-aromatic copolyester is comprised of repeat units of the following structures: ##STR6## wherein R 11 and R 12 are the same and are selected from the groups consisting of C 4 and C 6 alkylene wherein R 11 and R 12 are 100% of the diol components; R 13 is selected from the group consisting of C 3 -C 4 alkylene wherein the mole % of R 13 is from about 40-60% of the dicarboxylic components; and R 14 is selected from the group consisting of C6-C10 aryl wherein the mole % of R 14 is from about 60-40% of the dicarboxylic component.
Claim 2
Dependent Claim
147 words
A linear, random, semicrystalline aliphatic-aromatic copolyester which has an inherent viscosity of about 0.5 to 1.8 deciliters/gram as measured at a temperature of 25° C. for a 0.5 g sample in 100 mL of a 60/40 parts by weight solution of phenol/tetrachloroethane wherein the aliphatic-aromatic copolyester is comprised of repeat units of the following structures: ##STR6## wherein R 11 and R 12 are the same and are selected from the groups consisting of C 4 and C 6 alkylene wherein R 11 and R 12 are 100% of the diol components; R 13 is selected from the group consisting of C 3 -C 4 alkylene wherein the mole % of R 13 is from about 40-60% of the dicarboxylic components; and R 14 is selected from the group consisting of C6-C10 aryl wherein the mole % of R 14 is from about 60-40% of the dicarboxylic component.
Claim 3
Dependent Claim
19 words
The aliphatic-aromatic copolyester of claim 1 which has a melting point of about 75° C. to about 160° C.
Claim 4
Dependent Claim
15 words
The aliphatic-aromatic copolyester of claim 2 wherein R 14 is a 1,4-disubstituted C 6 aryl.
Claim 5
Dependent Claim
19 words
The aliphatic-aromatic copolyester of claim 2 consisting of poly(tetramethylene glutarate-co-terephthalate) copolyester wherein the mole % of terephthalate is 45-60%.
Claim 6
Dependent Claim
19 words
The aliphatic-aromatic copolyester of claim 2 consisting of poly(tetramethylene adipate-co-terephthalate) copolyester wherein the mole % of terephthalate is 40-60%.
Claim 7
Dependent Claim
19 words
The aliphatic-aromatic copolyester of claim 2 consisting of poly(hexamethylene adipate-co-terephthalate) copolyester wherein the mole % of terephthalate is 40-60%.
Claim 8
Dependent Claim
70 words
A mixture comprising: (A) about 50% to about 99% of claim 1 having an inherent viscosity of about 0.5 to about 1.8 deciliters/gram as measured at a temperature of 25° C. for a 0.5 g sample in 100 ml of a 60/40 parts by weight solution of phenol/tetrachloroethane, (B) about 1% to about 50% of biodegradable additives, said percentages being based on the weight of component (A) plus component (B).
Claim 9
Dependent Claim
11 words
The blend of claim 7 wherein component (B) is microcrystalline cellulose.
Claim 10
Dependent Claim
11 words
The blend of claim 7 wherein component (B) is cellulose monoacetate.
Claim 11
Dependent Claim
10 words
The blend of claim 7 wherein component (B) is starch.
Claim 12
Dependent Claim
18 words
The blend of claims 8, 9, or 10 wherein component (B) has a particle size of 0.1-15 microns.
Claim 13
Dependent Claim
52 words
The mixture of claim 7 additionally comprising 0,001 to 50 weight %, based on the total weight of the composition, of at least one additional additive selected from a non-polymeric plasticizer, a thermal stabilizer, an antioxidant, a pro-oxidant, an acid scavenger, an ultraviolet light stabilizer, a promoter of photodegradation, inorganics, and colorants.
Claim 14
Dependent Claim
12 words
The mixture of claim 12 wherein the inorganic is CaCO 3 .
Claim 15
Dependent Claim
20 words
The mixture of claim 12 wherein the colorant is a polyester with 0.01 to 50% of a covalently bound dye.
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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) | 1998-08-28 | 1999-02-27 | 1999-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-28 | 2003-02-27 | 2003-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-28 | 2007-02-27 | 2007-08-29 | $7700.00 | Window Closed / Lapsed |