US3904706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of polymers containing poly(alkylene oxide) units
Assignee: EIDP Inc
•
Filing: 1973-03-15
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Granted: 1975-09-09
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Expires: 1993-03-15
Abstract
Abstract A copolyetherester elastomer of improved thermostability is obtained by the preparation of a physical mixture of the copolyetherester elastomer with a polyurethane and an antioxidant.
Inventors
- 👤 Guenther Kurt Hoeschele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:29
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/005; C08L; C08L67/00; C08L67/02; C08L67/025
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
85 words
A COMPOSITION OF MTTER CONSISTING ESSENTIALLY OF A PHYSICAL MIXTURE OF (1) A COPOLYETHERESTER ELASTOMER (2)A MONOOR POLYURETHANE WHICH ON HYDROLYSIS YIELDS A PRIMARY AMINO GROUP CARBON DIOXIDE AND A HYDROXYL GROUP AND (3) UP TO 5 PERCENT BY WEIGHT BASED ON THE WEIGHT OF THE COPOLYETHERESTER ELASTOMER OF AN ANTIOXIDANT SAID COPOLYETHERESTER ELASTOMER BEING COMPOSED 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
85 words
A COMPOSITION OF MTTER CONSISTING ESSENTIALLY OF A PHYSICAL MIXTURE OF (1) A COPOLYETHERESTER ELASTOMER (2)A MONOOR POLYURETHANE WHICH ON HYDROLYSIS YIELDS A PRIMARY AMINO GROUP CARBON DIOXIDE AND A HYDROXYL GROUP AND (3) UP TO 5 PERCENT BY WEIGHT BASED ON THE WEIGHT OF THE COPOLYETHERESTER ELASTOMER OF AN ANTIOXIDANT SAID COPOLYETHERESTER ELASTOMER BEING COMPOSED 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
38 words
The composition of claim 1 wherein said mono- or polyurethane is physically mixed with said copolyetherester elastomer in an amount sufficient to provide urethane linkages in an amount of from about 0.01-7.0 percent by weight of copolyetherester elastomer.
Claim 4
Dependent Claim
29 words
The composition of claim 1 wherein component (2) is a substantially linear polyurethane derived from about equivalent amounts of at least one diisocyanate and at least one dihydroxy compound.
Claim 5
Dependent Claim
13 words
The composition of claim 2 wherein said urethane linkages have the general formula:
Claim 6
Dependent Claim
20 words
The composition of claim 4 wherein R'' and R'''' are independently selected from C2-C12 aliphatic and C4-C16 cycloaliphatic hydrocarbon radicals.
Claim 7
Dependent Claim
17 words
The composition of claim 1 wherein the urethanes are obtained by reacting a diol and a diisocyanate.
Claim 8
Dependent Claim
16 words
The composition of claim 1 wherein the urethane is the reaction product of hexamethylenediisocyanate and 1,4-butanediol.
Claim 9
Dependent Claim
15 words
The composition of claim 1 wherein said antioxidant is an arylamine or a hindered phenol.
Claim 10
Dependent Claim
15 words
The composition of claim 1 wherein said antioxidant is 4,4''-bis( Alpha , Alpha -dimethylbenzyl) diphenylamine.
Claim 11
Dependent Claim
15 words
The composition of claim 4 wherein said antioxidant is 4,4''-bis( Alpha , Alpha -dimethylbenzyl) diphenylamine.
Claim 12
Dependent Claim
24 words
The composition of claim 4 wherein said antioxidant is present in the amount of 0.2 to 5 weight present, based on the copolyetherester elastomer.
Claim 13
Dependent Claim
36 words
The composition of claim 4 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 phthalate.
Claim 14
Dependent Claim
12 words
The composition of claim 12 wherein said dicarboxylic acid is dimethyl terephthalate.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |