US5496910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxyfunctional thermoplastic polyesters
Assignee: Dow Chemical Co
•
Filing: 1994-07-21
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Granted: 1996-03-05
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Expires: 2014-07-21
Abstract
Abstract A biodegradable hydroxy-functional polyester is prepared by contacting a hydroxy-functional aliphatic dicarboxylic acid or a mixture of dicarboxylic acids containing hydroxy-functional aliphatic diacids, with a diglycidyl ether or diglycidyl ester in the presence of an onium catalyst in an ether solvent under conditions suitable for forming the polyester.
Inventors
- 👤 Michael N. Mang
- 👤 Jerry E. White
- 👤 Paul E. Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:11
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/40; C08G63/42; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/625; C08G63/60
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
90 words
A thermoplastic polyester having repeating units represented by the formula: ##STR7## wherein R 1 is a hydrocarbylene substituted with at least one hydroxyl group, optionally in combination with an unsubstituted aromatic moiety or an unsubstituted hydrocarbylene; R 3 is ##STR8## and R 4 is ##STR9## wherein R 2 is independently a divalent aromatic moiety or a hydrocarbylene; R 5 is independently hydrogen or lower alkyl; R 6 is a divalent aromatic moiety, or a hydrocarbylene optionally substituted with at least one hydroxyl group; and n is from 0 to 10.
Claim 2
Dependent Claim
90 words
A thermoplastic polyester having repeating units represented by the formula: ##STR7## wherein R 1 is a hydrocarbylene substituted with at least one hydroxyl group, optionally in combination with an unsubstituted aromatic moiety or an unsubstituted hydrocarbylene; R 3 is ##STR8## and R 4 is ##STR9## wherein R 2 is independently a divalent aromatic moiety or a hydrocarbylene; R 5 is independently hydrogen or lower alkyl; R 6 is a divalent aromatic moiety, or a hydrocarbylene optionally substituted with at least one hydroxyl group; and n is from 0 to 10.
Claim 3
Dependent Claim
53 words
The polyester of claim 1 wherein R 1 is independently (1) alkylene, cycloalkylene, alkenylene, alkyleneoxyalkylene, alkylenethioalkylene or alkylenesulfonylalkylene, substituted with at least one hydroxyl group and, optionally, combined with (2) arylene, alkylenearylene, dialkylenearylene, diaryleneketone, diarylenesulfone, diarylenesulfoxide, alkylidene-diarylene, diarylene oxide or diarylene sulfide; or another alkylene, cycloalkylene, or alkenylene, alkenylene, alkyleneoxyalkylene, alkylenethioalkylene or alkylenesulfonylalkylene.
Claim 4
Dependent Claim
22 words
The polyester of claim 1 wherein R 1 is independently hydroxymethylene, hydroxyethylene, dihydroxyethylene, hydroxypropylene, dihydroxypropylene, trihydroxypropylene, hydroxymethylethylene, hydroxybutylene, dihydroxybutylene, trihydroxybutylene, or tetrahydroxybutylene.
Claim 5
Dependent Claim
12 words
The polyester of claim 3 wherein R 1 is hydroxyethylene or dihydroxyethylene.
Claim 6
Dependent Claim
31 words
The polyester of claim 1 wherein R 2 is independently (1) arylene, alkylenearylene, dialkylenearylene, diaryleneketone, diarylenesulfone, diarylenesulfoxide, alkylidene-diarylene, diarylene oxide, diarylene sulfide, or (2) alkylene, cycloalkylene alkenylene, alkyleneoxyalkylene, alkylenethioalkylene, or alkylenesulfonylalkylene.
Claim 7
Dependent Claim
21 words
The polyester of claim 1 wherein R 2 is independently m-phenylene, p-phenylene, naphthylene, diphenylene-isopropylideneethylene, propylene, butylene, hexylene, octylene, decylene, or cyclohexylene.
Claim 8
Dependent Claim
38 words
The polyester of claim 1 wherein R 6 is (1) arylene, alkylenearylene, dialkylenearylene, diaryleneketone, diarylenesulfone, diarylenesulfoxide, alkylidene-diarylene, diarylene oxide, diarylene sulfide, or (2) alkylene, cycloalkylene, alkenylene, alkyleneoxyalkylene, alkylenethioalkylene, or alkylenesulfonylalkylene, optionally substituted with at least one hydroxyl group.
Claim 9
Dependent Claim
31 words
The polyester of claim 1 wherein R 6 is m-phenylene, p-phenylene, naphthylene, diphenylene-isopropylidene, ethylene, propylene, butylene, hexylene, octylene, decylene, cyclohexylene, hydroxyethylene, dihydroxyethylene, hydroxypropylene, dihydroxypropylene, trihydroxypropylene, hydroxymethylethylene, hydroxybutylene, dihydroxybutylene, trihydroxybutylene, or tetrahydroxybutylene.
Claim 10
Dependent Claim
10 words
The polyester of claim 1 wherein R 5 is hydrogen.
Claim 11
Dependent Claim
13 words
The polyester of claim 1 wherein n is from about 0 to 1000.
Claim 12
Dependent Claim
13 words
The polyester of claim 1 wherein n is from about 0 to 10.
Claim 13
Dependent Claim
33 words
The polyester of claim 1 prepared by reacting a hydroxy-functional aliphatic dicarboxylic acid, optionally in combination with another diacid, with a diglycidyl ether or diglycidyl ester, in the presence of an onium catalyst.
Claim 14
Dependent Claim
20 words
The polyester of claim 1 prepared by reacting bisphenol A diglycidyl ether and a mixture of isophthalic and tartaric acids.
Claim 15
Dependent Claim
25 words
The polyester of claim 2 prepared by reacting bisphenol A diglycidyl ether and a 1:1 to 9:1 molar ratio mixture of isophthalic and tartaric acids.
Claim 16
Dependent Claim
19 words
The polyester of claim 1 in the form of a biodegradable molded or foamed article, container, film or coating.
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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) | 1999-03-05 | 1999-09-04 | 2000-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-05 | 2003-09-04 | 2004-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-05 | 2007-09-04 | 2008-03-05 | $7700.00 | Window Closed / Lapsed |