Patent US3865788A successfully refreshed from Google Patents.
US3865788A
Expired / Lapsed
US
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Organopolysiloxane elastomers exhibiting high elongation
Assignee: AKZO PLASTICS BV A DUTCH CORP
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Filing: 1973-08-20
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Granted: 1975-02-11
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Expires: 1993-08-20
Abstract
Abstract Organopolysiloxane elastomers exhibiting high toughness and high elongation are obtained upon curing with t-butyl- Beta hydroxyethyl peroxide.
Inventors
- 👤 Norman G Gaylord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:09
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
72 words
A PROCESS FOR PEPARING HEAT CURABLE SILICONE ELASTOMER COMPOSITIONS WHICH AFTER COMPLETE CURING EXHIBIT EXCELLENT TOUGHNESS AND HIGH ELOGATION COMPRISING ADMIXING WITH AN ORGANOPOLYSILOXANE GUM THE ORGANIC PORTION OF WHICH IS ESSENTIALLY HYDROCARBON AND 0.05 TO 3 PERCENT BY WEIGHT OF THE ORGANOSILOXANE UNITS OF WHICH CONTAIRI OLEFINIC UNSATURATION FROM ABOUT 0.1 PART TO ABOUT 4 PARTS BY WEIGHT OF T-BUTYL-BHYDROXY ETHYL PEROXIDE PER 100 PARTS BY WEIGHT OF SAID ORGANOPOLYSILOXANE GUM.
Claim 2
Dependent Claim
72 words
A PROCESS FOR PEPARING HEAT CURABLE SILICONE ELASTOMER COMPOSITIONS WHICH AFTER COMPLETE CURING EXHIBIT EXCELLENT TOUGHNESS AND HIGH ELOGATION COMPRISING ADMIXING WITH AN ORGANOPOLYSILOXANE GUM THE ORGANIC PORTION OF WHICH IS ESSENTIALLY HYDROCARBON AND 0.05 TO 3 PERCENT BY WEIGHT OF THE ORGANOSILOXANE UNITS OF WHICH CONTAIRI OLEFINIC UNSATURATION FROM ABOUT 0.1 PART TO ABOUT 4 PARTS BY WEIGHT OF T-BUTYL-BHYDROXY ETHYL PEROXIDE PER 100 PARTS BY WEIGHT OF SAID ORGANOPOLYSILOXANE GUM.
Claim 3
Dependent Claim
33 words
The process of claim 1 wherein the t-butyl- Beta -hydroxy ethyl peroxide is admixed in proportions of between about 0.5 and about 1.0 part per 100 parts by weight of said organopolysiloxane gum.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein most of the hydrocarbon groups in said organopolysiloxane gum are methyl groups.
Claim 5
Dependent Claim
29 words
The process of claim 1 wherein the olefinic unsaturation in said 0.05 to 3 percent by weight fraction of diorganosiloxane units is mostly in the form of vinyl groups.
Claim 6
Dependent Claim
19 words
A process as defined in claim 1 wherein a filler is additionally admixed with the gum and the peroxide.
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |