US5384374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curing fluorocarbon elastomers
Assignee: Dyneon LLC
•
Filing: 1993-07-27
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Granted: 1995-01-24
•
Expires: 2013-07-27
Abstract
Abstract Fluorocarbon elastomer gum is compounded with fluorinated ether compositions, the resulting compounded gum is shaped and heated to form a cured shaped article such as automotive fuel line hose or O-ring.
Inventors
- 👤 Miguel A. Guerra
- 👤 David A. Stivers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:50
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/06; C08F; C08F8/00; C08F8/18; C08G; C08G65/00; C08G65/002; C08G65/005; C08G65/007; C08J; C08J3/00; C08J3/24; C08L; C08L71/00; C08L71/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
31 words
A fluorocarbon elastomer composition comprising (A) fluorocarbon elastomer gum, and (B) monohydroxy terminated fluorinated mono- or polyether of linear and regular structure, and wherein said hydroxy is reactive with said gum.
Claim 2
Dependent Claim
31 words
A fluorocarbon elastomer composition comprising (A) fluorocarbon elastomer gum, and (B) monohydroxy terminated fluorinated mono- or polyether of linear and regular structure, and wherein said hydroxy is reactive with said gum.
Claim 3
Dependent Claim
113 words
The composition of claim 1 wherein said fluorinated ether is HO--A--R.sub.f --O--(R.sub.fo).sub.n --R'.sub.f with a number average molecular weight between 250 and 3,000; where Q is a divalent linking group; R' f is a non-branched, monovalent, perfluoroalkyl group containing from 1 to 10 carbon atoms; R f is a non-branched, perfluoroalkylene group of 1 to 20 carbon atoms, R fo is a perfluoroalkyleneoxy group selected from the group consisting of --(CF 2 ) 2 --O--, --(CF 2 ) 3 --O--, --(CF 2 ) 4 --O--, --CF 2 --CF 2 --O--CF 2 --O--, and --CF 2 --CF 2 --O--CF 2 CF 2 --O--CF 2 --O--; and n is a number from 0 to 30.
Claim 4
Dependent Claim
44 words
The composition of claim 2 wherein Q is selected from the group consisting of --C y H 2y -- where y is 1 to 20 , --C 6 H 4 --, --C 6 H 3 Cl--, --C 2 H 4 O--, and combinations thereof.
Claim 5
Dependent Claim
14 words
The composition of claim 2 where R fo is --CF 2 CF 2 --O--.
Claim 6
Dependent Claim
10 words
The composition of claim 1 further comprising a curing system.
Claim 7
Dependent Claim
33 words
The composition of claim 1 wherein said fluorinated ether is present in an amount sufficient to impart, to the composition in its cured state, improved low-temperature flexibility or improved mold-release properties or both.
Claim 8
Dependent Claim
26 words
The composition of claim 1 wherein the amount of said fluorinated ether present is 0.5 to 50 weight percent based on the weight of said gum.
Claim 9
Dependent Claim
50 words
The composition of claim 1 wherein said gum comprises a polymer whose interpolymerized units comprise units derived from two or more of the following monomers, CF 2 ═CH 2 , CF 2 ═CFCF 3 , CF 2 ═CF 2 , CH 2 ═CHCH 3 , CF 2 ═CFOCF 3 .
Claim 10
Dependent Claim
18 words
The composition of claim 1 wherein said gum comprises a copolymer of vinylidene fluoride, hexafluoropropene, and, optionally, tetrafluoroethylene.
Claim 11
Dependent Claim
17 words
The composition of claim 1 wherein said gum comprises a copolymer of vinylidene fluoride, tetrafluoroethylene, and propylene.
Claim 12
Dependent Claim
28 words
The composition of claim 1 further comprising a dihydroxy terminated fluorinated mono- or polyether of linear and regular structure, and wherein said dihydroxy is reactive with said gum.
Claim 13
Dependent Claim
101 words
The composition of claim 11 wherein said dihydroxy terminated ether is HO--A--R.sub.f --O--(R.sub.fo).sub.n --R.sub.f --Q--OH with a number average molecular weight between 250 and 3,000; where Q is a divalent linking group; R f is a non-branched, perfluoroalkylene group of 1 to 20 carbon atoms; R fo is a perfluoroalkyleneoxy group selected from the group consisting of --(CF 2 ) 2 --O--(CF 2 ) 3 --O--, (CF 2 ) 2 ) 4 --O--, CF 2 --CF 2 --O--CF 2 --, and --CF 2 --CF 2 --O--CF 2 CF 2 --O--CF 2 --O--; and n is a number from 0 to 30.
Claim 14
Independent Claim
34 words
A method of preparing an elastomer composition, comprising mixing (A) fluorocarbon elastomer gum, and (B) monohydroxy functional, fluorinated, mono- or polyether of linear and regular structure, wherein said hydroxy is reactive with said gum.
Claim 15
Independent Claim
34 words
A method of preparing an elastomer composition, comprising mixing (A) fluorocarbon elastomer gum, and (B) monohydroxy functional, fluorinated, mono- or polyether of linear and regular structure, wherein said hydroxy is reactive with said gum.
Claim 16
Dependent Claim
112 words
The method of claim 13 wherein said fluorinated ether is HO-Q--R.sub.f --O--(R.sub.fo) n--R'.sub.f with an average molecular weight between 250 and 3,000; where Q is a divalent linking group; R' f is a non-branched, monovalent, perfluoroalkyl group containing from 1 to 10 carbon atoms; R f is a non-branched, perfluoroalkylene group of 1 to 20 carbon atoms, R fo is a perfluoroalkyleneoxy group selected from the group consisting of --(CF 2 ) 2 --O--, --(CF 2 ) 3 --O--, (CF 2 ) 4 --O--, --CF 2 --CF 2 --O--CF 2 --O--, and --CF 2 --CF 2 --O--CF 2 CF 2 --O--CF 2 --O--; and n is a number from 0 to 30.
Claim 17
Independent Claim
177 words
A method of forming a cured elastomeric article, comprising the steps of: 1) shaping, at an elevated temperature into the form of an article, a compounded curable elastomer composition, comprising (A) fluorocarbon elastomer gum (B) monohydroxy functional, fluorinated, mono- or polyether of linear and regular structure, wherein said hydroxy is reactive with said gum, having structure HO--Q--R.sub.f --O--(R.sub.fo).sub.n --R'.sub.f with a number average molecular weight between 250 and 3,000; where Q is a divalent linking group; R' f is a non-branched, monovalent, perfluoroalkyl group containing from 1 to 10 carbon atoms; R f is a non-branched, perfluoroalkylene group of 1 to 20 carbon atoms, R fo is a perfluoroalkyleneoxy group selected from the group consisting of --(CF 2 ) 2 --O--, --(CF 2 ) 3 --O--, (CF 2 ) 4 --O----CF 2 --CF 2 --O--CF 2 --O--, and --CF 2 --CF 2 O--CF 2 CF 2 --O--CF 2 --O--; and n is a number from 0 to 30, and (C) a cure system for said gum; and 2) heating said formed article to cure said compounded composition.
Claim 18
Independent Claim
177 words
A method of forming a cured elastomeric article, comprising the steps of: 1) shaping, at an elevated temperature into the form of an article, a compounded curable elastomer composition, comprising (A) fluorocarbon elastomer gum (B) monohydroxy functional, fluorinated, mono- or polyether of linear and regular structure, wherein said hydroxy is reactive with said gum, having structure HO--Q--R.sub.f --O--(R.sub.fo).sub.n --R'.sub.f with a number average molecular weight between 250 and 3,000; where Q is a divalent linking group; R' f is a non-branched, monovalent, perfluoroalkyl group containing from 1 to 10 carbon atoms; R f is a non-branched, perfluoroalkylene group of 1 to 20 carbon atoms, R fo is a perfluoroalkyleneoxy group selected from the group consisting of --(CF 2 ) 2 --O--, --(CF 2 ) 3 --O--, (CF 2 ) 4 --O----CF 2 --CF 2 --O--CF 2 --O--, and --CF 2 --CF 2 O--CF 2 CF 2 --O--CF 2 --O--; and n is a number from 0 to 30, and (C) a cure system for said gum; and 2) heating said formed article to cure said compounded composition.
Claim 19
Dependent Claim
13 words
A shaped article comprising the composition of claim 1 in its cured state.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-23 | 1998-07-25 | 1999-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-23 | 2002-07-25 | 2003-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-23 | 2006-07-25 | 2007-01-24 | $7700.00 | Window Closed / Lapsed |