US5281691A
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Poly(3-hydroxyalkanoates)
Assignee: Eastman Chemical Co
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Filing: 1992-06-19
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Granted: 1994-01-25
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Expires: 2012-06-19
Abstract
Abstract Novel poly(3-hydroxyalkanoates), such as poly(3-hydroxybutyrate), and blends of these with other polymers are disclosed. A novel process for producing these poly(3-hydroxyalkanoates) is also disclosed which entails polymerizing one or more β-substituted-β-propiolactone(s) under polymerization conditions in the substantial absence of water in the presence of an anionic initiator.
Inventors
- 👤 John C. Hubbs
- 👤 Marti N. Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:23
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/04; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08; C08G63/78; C08G63/82; C08G63/823; C08L101/00; C08L67/02; C08L2201/00; C08L2201/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
92 words
A composition comprising poly(3-hydroxyalkanoate) containing recurring units of the formula: ##STR18## wherein n is an integer from 10 to 12,000; m is an integer of at least 2; R and R 1 are each independently selected from the group consisting of saturated and unsaturated C 1 -C 20 alkyls and substituted alkyls, C 3 to C 10 aryls and substituted aryls, C 5 to C 10 cycloalkyls and substituted cycloalkyls and R 1 is also selected from hydrogen; and P is a monomeric carbon skeleton backbone or polymeric backbone bearing polycarboxylate functionality.
Claim 2
Dependent Claim
92 words
A composition comprising poly(3-hydroxyalkanoate) containing recurring units of the formula: ##STR18## wherein n is an integer from 10 to 12,000; m is an integer of at least 2; R and R 1 are each independently selected from the group consisting of saturated and unsaturated C 1 -C 20 alkyls and substituted alkyls, C 3 to C 10 aryls and substituted aryls, C 5 to C 10 cycloalkyls and substituted cycloalkyls and R 1 is also selected from hydrogen; and P is a monomeric carbon skeleton backbone or polymeric backbone bearing polycarboxylate functionality.
Claim 3
Dependent Claim
24 words
The composition according to claim 1 wherein m is an integer from 2 to 1,000 and n is an integer from 150 to 10,000.
Claim 4
Dependent Claim
15 words
The composition according to claim 2 wherein m is an integer from 3 to 100.
Claim 5
Dependent Claim
17 words
The composition according to claim 1 wherein P is a monomeric carbon skeleton backbone bearing polycarboxylate functionality.
Claim 6
Dependent Claim
37 words
The composition according to claim 1 wherein the poly(3-hydroxyalkanoate) has an inherent viscosity of about 0.2 to 6 at 25° C. on a 0.5 gram sample in 100 ml of a 60/40 by weight solution of phenol/tetrachloroethane.
Claim 7
Dependent Claim
29 words
The composition according to claim 1 wherein R 1 is hydrogen and R is selected from the group consisting of C 1 to C 5 alkyls and substituted alkyls.
Claim 8
Dependent Claim
15 words
The composition according to claim 1 wherein m is an integer of at least 3.
Claim 9
Dependent Claim
21 words
The composition according to claim 1 wherein P is selected from the group consisting of cellulose acetate succinate, 1,2,3-propanetricarboxylate, and 1,2,3,4-butanetetracarboxylate.
Claim 10
Dependent Claim
38 words
The composition according to claim 5 wherein the poly(3-hydroxyalkanoate) has an inherent viscosity of about 0.4 to 2 at 25° C. for a 0.5 gram sample in a 100 ml of a 60/40 by weight solution of phenol/tetrachlorethane.
Claim 11
Dependent Claim
19 words
The composition according to claim 1 wherein the poly(3-hydroxyalkanoate) has a polydispersity index greater than 1 to about 1.7.
Claim 12
Dependent Claim
10 words
The composition according to claim 6 wherein R is methyl.
Claim 13
Dependent Claim
11 words
The composition according to claim 11 wherein R 1 is hydrogen.
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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) | 1997-01-24 | 1997-07-26 | 1998-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-24 | 2001-07-26 | 2002-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-24 | 2005-07-26 | 2006-01-25 | $7700.00 | Window Closed / Lapsed |