US2999081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition comprising phenol-aldehyde resin and heavy metal hydroxy halide, and process for the vulcanization of rubber therewith
Assignee: 3M Co
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Filing: 1958-09-15
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Granted: 1961-09-05
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Expires: 1978-09-15
Abstract
No abstract record available.
Inventors
- 👤 David A Stivers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:44
CPC Classifications
C; C08; C08L; C08L21/00; C08L61/00; C08L61/04; C08L61/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PROCESS FOR THE VULCANIZATION OF A RAW CONJUGATED DIENE RUBBER WHICH COMPRISES INCORPORATING WITH SAID RUBBER A META-SUBSTITUTED PHENOL-FORMALDEHYDE RESIN AS A VULCANIZING AGENT, STANNOUS HYDROXY CHLORIDE AS A CATALYST, AND A NORMALLY LIQUID ALKYL CHLORIDE AS A HYDROGEN CHLORIDE DONATOR, IN AN AMOUNT SUCH THAT THE VULCANIZING AGENT IS PRESENT IN A WEIGHT RATIO OF ABOUT 1:100 TO ABOUT 20:100 OF VULCANIZING AGENT TO ELASTOMER AND THE STANNOUS HYDROXY CHLORIDE CATALYST AND THE HYDROGEN CHLORIDE DONATOR ARE PRESENT, RESPECTIVELY, IN AN AMOUNT BETWEEN ABOUT 1:10 AND ABOUT 10:1 OF VULCANIZING AGENT TO THESE INGREDIENTS, HEATING THE RESULTING MIXTURE AT A TEMPERATURE BETWEEN ABOUT 250* AND ABOUT 400*F. FOR A PERIOD OF TIME OF AT LEAST 5 MINUTES TO VULCANIZE THE RUBBER WITHOUT SUBSTANTIAL SCORCH.
Claim 2
Dependent Claim
126 words
A PROCESS FOR THE VULCANIZATION OF A RAW CONJUGATED DIENE RUBBER WHICH COMPRISES INCORPORATING WITH SAID RUBBER A META-SUBSTITUTED PHENOL-FORMALDEHYDE RESIN AS A VULCANIZING AGENT, STANNOUS HYDROXY CHLORIDE AS A CATALYST, AND A NORMALLY LIQUID ALKYL CHLORIDE AS A HYDROGEN CHLORIDE DONATOR, IN AN AMOUNT SUCH THAT THE VULCANIZING AGENT IS PRESENT IN A WEIGHT RATIO OF ABOUT 1:100 TO ABOUT 20:100 OF VULCANIZING AGENT TO ELASTOMER AND THE STANNOUS HYDROXY CHLORIDE CATALYST AND THE HYDROGEN CHLORIDE DONATOR ARE PRESENT, RESPECTIVELY, IN AN AMOUNT BETWEEN ABOUT 1:10 AND ABOUT 10:1 OF VULCANIZING AGENT TO THESE INGREDIENTS, HEATING THE RESULTING MIXTURE AT A TEMPERATURE BETWEEN ABOUT 250* AND ABOUT 400*F. FOR A PERIOD OF TIME OF AT LEAST 5 MINUTES TO VULCANIZE THE RUBBER WITHOUT SUBSTANTIAL SCORCH.
References Cited (Backward Citations)
US2727874A
Cited
US2726224A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |