US5153272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable mixes of fluoroelastomers containing bormine or iodine and of organic peroxides
Assignee: Syensqo Specialty Polymers Italy SpA
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Filing: 1990-07-23
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Granted: 1992-10-06
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Expires: 2010-07-23
Abstract
Abstract There are described mixes, which are curable by using radical intermediates, are based on fluoroelastomers containing bromine or iodine, exhibit, during curing, a low emission of toxic vapors of methyl bromide or iodide and are characterized in that they contain, as cross-linking agents, peroxides having the following formulas: ##STR1## wherein the substitutents from R 1 to R 17 have the significances defined in the specification.
Inventors
- 👤 Graziella Chiodini
- 👤 Attilio Lagostina
- 👤 Michele Merenda
- 👤 Anna Minutillo
- 👤 Ezio Montessoro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:52
CPC Classifications
C; C07; C07C; C07C409/00; C07C409/16; C08; C08K; C08K5/00; C08K5/04; C08K5/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
214 words
Curable mixes based on fluoroelastomers containing bromine and/or iodine in the polymeric chain, comprising organic peroxides as radical cross-linking agents, characterized in that the peroxides are selected from the monoperoxides of formula: ##STR11## wherein: R 1 , R 6 , like or different from each other, are C 2 -C 4 alkyls; R 3 , R 4 , like or different from each other, are C 1 -C 4 alkyls; R 2 , R 5 , like or different from each other, are C 1 -C 4 alkyls, phenyls, phenyls substituted by C 1 -C 4 alkyls; and the bisperoxides of formula: ##STR12## wherein R 7 is C 1 -C 6 alkylene, C 2 -C 6 alkenylene, C 2 -C 6 alkynylene, phenylene; R 8 , R 9 , R 10 , R 11 , like or different from one another, are C 1 -C 3 alkyls; R 13 , R 15 , like or different from each other, are C 2 -C 4 alkyls; R 12 , R 14 , R 16 , R 17 , like or different from one another, are C 1 -C 4 alkyls; provided that, when R 7 is phenylene R 8 , R 11 , like or different from each other, are C 2 -C 4 alkyls.
Claim 2
Dependent Claim
214 words
Curable mixes based on fluoroelastomers containing bromine and/or iodine in the polymeric chain, comprising organic peroxides as radical cross-linking agents, characterized in that the peroxides are selected from the monoperoxides of formula: ##STR11## wherein: R 1 , R 6 , like or different from each other, are C 2 -C 4 alkyls; R 3 , R 4 , like or different from each other, are C 1 -C 4 alkyls; R 2 , R 5 , like or different from each other, are C 1 -C 4 alkyls, phenyls, phenyls substituted by C 1 -C 4 alkyls; and the bisperoxides of formula: ##STR12## wherein R 7 is C 1 -C 6 alkylene, C 2 -C 6 alkenylene, C 2 -C 6 alkynylene, phenylene; R 8 , R 9 , R 10 , R 11 , like or different from one another, are C 1 -C 3 alkyls; R 13 , R 15 , like or different from each other, are C 2 -C 4 alkyls; R 12 , R 14 , R 16 , R 17 , like or different from one another, are C 1 -C 4 alkyls; provided that, when R 7 is phenylene R 8 , R 11 , like or different from each other, are C 2 -C 4 alkyls.
Claim 3
Dependent Claim
11 words
The mixes according to claim 1, wherein the peroxide is bis(1,1-dimethylpropyl)peroxide.
Claim 4
Dependent Claim
11 words
The mixes according to claim 1, wherein the peroxide is bis(1,1-diethylpropyl)peroxide.
Claim 5
Dependent Claim
11 words
The mixes according to claim 1, wherein the peroxide is bis(1-ethyl-1-methylpropyl)peroxide.
Claim 6
Dependent Claim
12 words
The mixes according to claim 1, wherein the peroxide is 1,1-diethylpropyl, 1-ethyl-1-methylpropyl-peroxide.
Claim 7
Dependent Claim
11 words
The mixes according to claim 1, wherein the peroxide is 2,5-dimethyl-2,5-di-ter.amylperoxy-hexane.
Claim 8
Dependent Claim
20 words
The mixes according to claim 1, furthermore containing from 0.1 to 1 part by weight of benzothiazole or derivatives thereof.
Claim 9
Dependent Claim
17 words
The mixes according to claim 1, furthermore containing from 0.1 to 2 parts by weight of N-phenylmaleimide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-10-06 | 1996-04-06 | 1996-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-06 | 2000-04-06 | 2000-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-06 | 2004-04-06 | 2004-10-06 | $7700.00 | Window Closed / Lapsed |