US4937314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyetherester elastomer with poly(1,3-propylene terephthalate) hard segment
Assignee: EIDP Inc
•
Filing: 1989-02-28
•
Granted: 1990-06-26
•
Expires: 2009-02-28
Abstract
Abstract A thermoplastic, segmented, linear copolyetherester elastomer of at least 70 weight percent soft segments, derived from poly(alkylene oxide) glycols and terephthalic acid, and hard segments constituting 10-30% of the elastomer and being 95 to 100% poly(1,3-propylene terephthalate). Melt-spun and drawn fibers of the elastomer have superior elastic and set properties versus comparable fibers made from such elastomers having hard segments of poly(ethylene terephthalate) or of poly(1,4-butylene terephthalate).
Inventors
- 👤 Robin N. Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:44
CPC Classifications
C; C08; C08G; C08G63/00; D; D01; D01F; D01F6/00; D01F6/78; D01F6/86; C08G63/66; C08G63/668; C08G63/672
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
151 words
A thermoplastic, segmented, linear copolyetherester elastomer which consists essentially of a multiplicity of recurring intralinear long-chain and short-chain ester units connected head-to-tail through ester linkages, the long-chain ester units amounting to at least 70 percent by weight of the elastomer and being represented by the structure ##STR3## and the short-chain ester units amounting to 10 to 30 percent by weight of the elastomer and being represented by the structure ##STR4## wherein R is a divalent radical remaining after removal of carboxyl groups from a dicarboxylic acid which consists essentially of terephthalic acid, G is a divalent radical remaining after removal of hydroxyl groups from a poly(alkylene oxide) glycol having a carbon-to-oxygen ratio in the range of 2.0 to 4.3 and a molecular weight in the range of 1,500 to 5,000, and D is a divalent radical remaining after removal of terminal hydroxyl groups from a diol which consists essentially of 1,3-propanediol.
Claim 2
Dependent Claim
151 words
A thermoplastic, segmented, linear copolyetherester elastomer which consists essentially of a multiplicity of recurring intralinear long-chain and short-chain ester units connected head-to-tail through ester linkages, the long-chain ester units amounting to at least 70 percent by weight of the elastomer and being represented by the structure ##STR3## and the short-chain ester units amounting to 10 to 30 percent by weight of the elastomer and being represented by the structure ##STR4## wherein R is a divalent radical remaining after removal of carboxyl groups from a dicarboxylic acid which consists essentially of terephthalic acid, G is a divalent radical remaining after removal of hydroxyl groups from a poly(alkylene oxide) glycol having a carbon-to-oxygen ratio in the range of 2.0 to 4.3 and a molecular weight in the range of 1,500 to 5,000, and D is a divalent radical remaining after removal of terminal hydroxyl groups from a diol which consists essentially of 1,3-propanediol.
Claim 3
Dependent Claim
19 words
An elastomer in accordance with claim 1, wherein the short chain ester units are substantially all poly(1,3-propylene terephthalate) units.
Claim 4
Dependent Claim
35 words
An elastomer in accordance with claim 1, wherein the poly-alkylene oxide) of the glycol is selected from the group consisting of poly(tetramethylene oxide), copolymers of tetrahydrofuran and ethylene oxide and copolymers of tetrahydrofuran and 3-methyltetrahydrofuran.
Claim 5
Dependent Claim
24 words
An elastomer in accordance with claim 3 wherein the long chain ester units have a molecular weight in the range of 1,500 to 5,000.
Claim 6
Dependent Claim
19 words
An elastomer in accordance with claim 4, wherein the molecular weight is in the range of 2,000 to 4,000.
Claim 7
Dependent Claim
27 words
An elastomer in accordance with claim 3, wherein the short chain ester units are in the range of 15 percent to 27 by weight of the elastomer.
Claim 8
Dependent Claim
29 words
An elastomer in accordance with claim 3, wherein the mole ratio of short chain ester units to long chain ester units is in the range of 2.5 to 4.5.
Claim 9
Dependent Claim
21 words
An elastomer in accordance with claim 7, wherein the wherein the mole ratio is in the range of 2.7 to 3.5.
Claim 10
Dependent Claim
43 words
An elastomer in accordance with claim 3, 5, 7 or 8, wherein the short chain ester units are derived from a copolymer of tetrahydrofuran and 3-methyltetrahydrofuran, with the mole percent of 3-methyltetrahydrofuran in the copolymer being in the range of 7 to 15.
Claim 11
Dependent Claim
37 words
An elastomer in accordance with claim 3, 5, 7 or 8, wherein the short chain ester units are derived from a copolymer of tetrahydrofuran and ethylene oxide, with the mole percent of ethylene oxide being about 50.
Claim 12
Dependent Claim
14 words
An elastomer of any of claim 1 in the form of a melt-spun fiber.
Claim 13
Dependent Claim
6 words
A drawn fiber of claim 11.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-25 | 1993-12-25 | 1994-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-25 | 1997-12-25 | 1998-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-25 | 2001-12-25 | 2002-06-26 | $7700.00 | Window Closed / Lapsed |