US3210318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxymethylene polymers stabilized with epoxides
Assignee: Celanese Corp
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Filing: 1961-10-23
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Granted: 1965-10-05
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Expires: 1981-10-23
Abstract
Abstract An oxymethylenepolymer is stabilized by incorporation therein of an epoxy compound containing at least two epoxy groups in the molecule and is monomeric unless the polymer is a copolymer containing adjacent carbon atoms when the epoxy compound may also be a resin. Specified epoxy compounds are dicyclopentadiene dioxide vinylcyclohexene dioxide, 3,4 - epoxy - 6 - methylcyclohexyl-methyl - 3,4 - 6 - methyl cyclohexane carboxylate, resorcinol diglycidyl ether and epoxidized drying oils. Phenolic stabilizers may also be present, e.g. diphenylol methane or 2,21-methylene - bis - (4 - methyl - 6 - tertiary butyl phenol). The polymers may be end capped either by esterification or by etherification.
Inventors
- 👤 Thomas J Dolce
- 👤 John H Prichard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:30
CPC Classifications
C; C08; C08L; C08L59/00; C08L59/02; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1515; C08L63/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A STABILIZED COMPOSITION COMPRISING AN OXYMETHYLENE POLYMER HAVING AT LEAST ABOUT 80% BY WEIGHT OF OXYMETHYLENE UNITS IN THE FORM OF CHAINS OF REPEATING OXYMETHYLENE UNITS AND AN 1,2-EPOXY COMPOUND CONTAINING AT LEAST TWO EPOXY GROUPS, SAID EPOXY COMPOUND BEING PRESENT IN SUFFICIENT AMOUNT SO THAT SAID POLYMER COMPOSITION EXHIBITS A GREATER DEGREE OF THERMAL STABILITY THAT DOES SAID COMPOSITION IN THE ABSENCE OF SAID EPOXY COMPOUND.
Claim 2
Dependent Claim
67 words
A STABILIZED COMPOSITION COMPRISING AN OXYMETHYLENE POLYMER HAVING AT LEAST ABOUT 80% BY WEIGHT OF OXYMETHYLENE UNITS IN THE FORM OF CHAINS OF REPEATING OXYMETHYLENE UNITS AND AN 1,2-EPOXY COMPOUND CONTAINING AT LEAST TWO EPOXY GROUPS, SAID EPOXY COMPOUND BEING PRESENT IN SUFFICIENT AMOUNT SO THAT SAID POLYMER COMPOSITION EXHIBITS A GREATER DEGREE OF THERMAL STABILITY THAT DOES SAID COMPOSITION IN THE ABSENCE OF SAID EPOXY COMPOUND.
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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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |