US2723966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing siloxane elastomers using dichlorobenzoylperoxide
Assignee: Dow Silicones Corp
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Filing: 1953-11-19
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Granted: 1955-11-15
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Expires: 1973-11-19
Abstract
No abstract record available.
Inventors
- 👤 Delmar C Youngs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:53
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD OF PRODUCING SILOXANE ELASTOMERS WHICH COMPRISES HEATING A MIXTURE OF A METHYLPOLYSILOXANE CONTAINING UP TO 30 MOL PER CENT OF A COPOLYMERIZED SILOXANE OF THE GROUP CONSISTING OF PHENYLMETHYLSILOXANE UNITS, DIPHENYLSILOXANE UNITS, METHYLVINYLSILOXANE UNITS, AND PHENYLVINYLSILOXANE UNITS, SAID METHYLSILOXANE HAVING A PLASTICITY OF AT LEAST 30 MILS, THE RATIO OF ORGANIC RADICALS TO SILICON ATOMS IN SAID SILOXANE BEING, ON THE AVERAGE, 1.9 TO 2.0, A FILLER, AND DICHLOROBENZOYL PEROXIDE CONTAINING TWO CHLORINE ATOMS PER BENZOYL RADICAL, AT A TEMPERATURE OF FROM 200*C. TO 400*C. WHEREBY VULCANIZATION OF THE SILOXANE WITHOUT BUBBING IS OBTAINED.
Claim 2
Independent Claim
96 words
A METHOD OF PRODUCING SILOXANE ELASTOMERS WHICH COMPRISES HEATING A MIXTURE OF A METHYLPOLYSILOXANE CONTAINING UP TO 30 MOL PER CENT OF A COPOLYMERIZED SILOXANE OF THE GROUP CONSISTING OF PHENYLMETHYLSILOXANE UNITS, DIPHENYLSILOXANE UNITS, METHYLVINYLSILOXANE UNITS, AND PHENYLVINYLSILOXANE UNITS, SAID METHYLSILOXANE HAVING A PLASTICITY OF AT LEAST 30 MILS, THE RATIO OF ORGANIC RADICALS TO SILICON ATOMS IN SAID SILOXANE BEING, ON THE AVERAGE, 1.9 TO 2.0, A FILLER, AND DICHLOROBENZOYL PEROXIDE CONTAINING TWO CHLORINE ATOMS PER BENZOYL RADICAL, AT A TEMPERATURE OF FROM 200*C. TO 400*C. WHEREBY VULCANIZATION OF THE SILOXANE WITHOUT BUBBING IS OBTAINED.
References Cited (Backward Citations)
US2494920A
Cited
US2658882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |