US3907926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of thermoplastic copolyetherester with poly-butylene terephthalate
Assignee: EIDP Inc
•
Filing: 1973-12-19
•
Granted: 1975-09-23
•
Expires: 1993-12-19
Abstract
Abstract A substantially uniform blend of poly(butylene terephthalate), having a melt index of less than 50 at 250*C and a copolyetherester composition consisting essentially of a multiplicity of recurring long chain units and short chain ester units joined head-to-tail through ester linkages.
Inventors
- 👤 Morton Brown
- 👤 Robert Mansfield Prosser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:08
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/672; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/20; C08L67/025; C08L77/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
A SUBSTANTIALLY UNIFORM BLEND OF (A) ABOUT 5-200 PARTS BY WEIGHT OF POLY(BUTYLENE TEREPHTHALATE) HAVING A MELT INDEX NOT GREATER THAN 50 AT 250*C WITH A 2160-G. LOAD AND (B) 100 PARTS BY WEIGHT OF A COPOLYETHERESTER COMPOSITION CONSISTING ESSENTIALLY OF A MULTIPLICITY OF RECURRING LONG CHAIN ESTER UNITS AND SHORT CHAIN ESTER UNITS JOINED HEAD-TO-TAIL THROUGH ESTER LINKAGES, SAID LONG CHAIN ESTER UNITS BEING REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
69 words
A SUBSTANTIALLY UNIFORM BLEND OF (A) ABOUT 5-200 PARTS BY WEIGHT OF POLY(BUTYLENE TEREPHTHALATE) HAVING A MELT INDEX NOT GREATER THAN 50 AT 250*C WITH A 2160-G. LOAD AND (B) 100 PARTS BY WEIGHT OF A COPOLYETHERESTER COMPOSITION CONSISTING ESSENTIALLY OF A MULTIPLICITY OF RECURRING LONG CHAIN ESTER UNITS AND SHORT CHAIN ESTER UNITS JOINED HEAD-TO-TAIL THROUGH ESTER LINKAGES, SAID LONG CHAIN ESTER UNITS BEING REPRESENTED BY THE FORMULA
Claim 3
Dependent Claim
18 words
The blend of claim 1 wherein the poly(butylene terephthalate) has a melt index of between 25 and 1.
Claim 4
Dependent Claim
28 words
The blend of claim 1 wherein the poly(butylene terephthalate) is present in the amount of 10 to 60 parts by weight per 100 parts by weight of copolyetherester.
Claim 5
Dependent Claim
17 words
The composition of claim 1 additionally containing an effective amount of an arylamine or hindered phenol antioxidant.
Claim 6
Dependent Claim
40 words
The composition of claim 3 wherein said poly(alkylene oxide) glycol is poly(tetramethylene oxide) glycol having a molecular weight of 600-2000, the diol is 1,4-butanediol and the dicarboxylic acid is a mixture of dimethyl terephthalate and dimethyl phthalate or dimethyl isophthalate.
Claim 7
Dependent Claim
12 words
The composition of claim 5 wherein said dicarboxylic acid is dimethyl terephthalate.
Claim 8
Dependent Claim
17 words
The composition of claim 6 wherein said short chain segments constitute 45-65% by weight of the copolyetherester.
Claim 9
Dependent Claim
23 words
The composition of claim 1 containing as an antioxidant 4,4''-bis( Alpha , Alpha -dimethylbenzyl)diphenylamine in the amount of 0.5 to 5 weight percent.
Claim 10
Dependent Claim
23 words
The composition of claim 8 additionally containing an effective amount of a stabilizer which consists essentially of 0.5-3.0 weight percent of amide linkages.
References Cited (Backward Citations)
US3466348A
Cited
US3784520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |