US2821515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of incorporating oil in butyl rubber
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1955-01-11
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Granted: 1958-01-28
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Expires: 1975-01-11
Abstract
No abstract record available.
Inventors
- 👤 Stanley E Jaros
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:41
CPC Classifications
C; C08; C08F; C08F10/00; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
THE PROCESS WHICH COMPRISES POLYMERIZING ISOBUTYLENE AT A TEMPERATURE BETWEEN -40*C. AND 160*C., IN CONTACT WITH A FRIEDEL-CRAFTS CATALYST DISSOLVED IN AN ORGANIC NON-COMPLEX FORMING SOLVENT WHICH IS LIQUID AT THE REACTION TEMPERATURE, TO FORM A POLYMER, MIXING SAID POLYMER WITH A SOLUTION OF AN EXTENDER OIL IN A DILUENT, DISCHARGING SAID POLYMER INTO WATER HEATED TO A TEMPERATURE OF 100* TO 180*F. AND CONTAINING A WATER-INSOLUBLE SOAP OF A FATTY ACID HAVING 16 TO 18 CARBON ATOMS PER MOLECULE AND A METAL SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM, ZINC, ALUMINUM AND CALCIUM IN ORDER TO FLASH OFF THE VOLATILE REACTION LIQUID AND MAINTAIN THE POLYMER IN FINELY DIVIDED FORM, SEPARATING THE POLYMER PARTICLES FROM THE WATER, WITHDRAWING THE VOLATILIZED MATERIALS, SUBJECTING THE VOLATILIZED MATERIALS TO A RECOVERY TREATMENT AND RECYCLING THE RECOVERED MATERIAL TO THE POLYMERIZATION.
Claim 2
Dependent Claim
138 words
THE PROCESS WHICH COMPRISES POLYMERIZING ISOBUTYLENE AT A TEMPERATURE BETWEEN -40*C. AND 160*C., IN CONTACT WITH A FRIEDEL-CRAFTS CATALYST DISSOLVED IN AN ORGANIC NON-COMPLEX FORMING SOLVENT WHICH IS LIQUID AT THE REACTION TEMPERATURE, TO FORM A POLYMER, MIXING SAID POLYMER WITH A SOLUTION OF AN EXTENDER OIL IN A DILUENT, DISCHARGING SAID POLYMER INTO WATER HEATED TO A TEMPERATURE OF 100* TO 180*F. AND CONTAINING A WATER-INSOLUBLE SOAP OF A FATTY ACID HAVING 16 TO 18 CARBON ATOMS PER MOLECULE AND A METAL SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM, ZINC, ALUMINUM AND CALCIUM IN ORDER TO FLASH OFF THE VOLATILE REACTION LIQUID AND MAINTAIN THE POLYMER IN FINELY DIVIDED FORM, SEPARATING THE POLYMER PARTICLES FROM THE WATER, WITHDRAWING THE VOLATILIZED MATERIALS, SUBJECTING THE VOLATILIZED MATERIALS TO A RECOVERY TREATMENT AND RECYCLING THE RECOVERED MATERIAL TO THE POLYMERIZATION.
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) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |