Patent US2270027A successfully refreshed from Google Patents.
Patent US4530970A successfully refreshed from Google Patents.
US4530970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoroelastomer composition and lining material made thereof
Assignee: AGC Inc
•
Filing: 1984-03-20
•
Granted: 1985-07-23
•
Expires: 2004-03-20
Abstract
Abstract A fluoroelastomer composition comprising a fluoroelastomer and a polyvinylidene fluoride, wherein the fluoroelastomer is a peroxide-curable fluorinated copolymer elastomer, the polyvinylidene fluoride is fine powder having an average particle size of at most 20 mu m, and the composition contains a peroxide and an allyl compound as essential ingredients.
Inventors
- 👤 Mitsuharu Morozumi
- 👤 Yasumichi Ito
- 👤 Takeshi Hiramatsu
- 👤 Minoru Asai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:18
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/14; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
151 words
A fluoroelastomer composition comprising a fluoroelastomer and a polyvinylidene fluoride, wherein (a) the fluoroelastomer is a peroxide-curable fluorinated copolymer elastomer, (b) the polyvinylidene fluoride is a fine powder having an average particle size of at most 20 μm, and the composition contains a peroxide and about 0.2 to 20 polyallyl monomer as essential ingredients; wherein the amounts of the polyvinylidene fluoride, the peroxide and the allyl compound are from 30 to 300 parts by weight, from 0.1 to 10 parts by weight and from 0.2 to 20 parts by weight, respectively, based on 100 parts by weight of the fluoroelastomer; wherein the fluorinated copolymer elastomer has, in its polymer structure, at least one kind of cure site selected from the group consisting of an unsaturated bond, a --CF 2 X group where X is iodine or bromine, a CFX group where X is as defined above and a --CH 3 group.
Claim 2
Dependent Claim
151 words
A fluoroelastomer composition comprising a fluoroelastomer and a polyvinylidene fluoride, wherein (a) the fluoroelastomer is a peroxide-curable fluorinated copolymer elastomer, (b) the polyvinylidene fluoride is a fine powder having an average particle size of at most 20 μm, and the composition contains a peroxide and about 0.2 to 20 polyallyl monomer as essential ingredients; wherein the amounts of the polyvinylidene fluoride, the peroxide and the allyl compound are from 30 to 300 parts by weight, from 0.1 to 10 parts by weight and from 0.2 to 20 parts by weight, respectively, based on 100 parts by weight of the fluoroelastomer; wherein the fluorinated copolymer elastomer has, in its polymer structure, at least one kind of cure site selected from the group consisting of an unsaturated bond, a --CF 2 X group where X is iodine or bromine, a CFX group where X is as defined above and a --CH 3 group.
Claim 3
Dependent Claim
21 words
The composition according to claim 1, wherein the fluorinated copolymer elastomer contains units derived from tetrafluoroethylene and propylene, as essential components.
Claim 4
Dependent Claim
13 words
A lining material obtained by sheeting the composition as defined in claim 1.
Claim 5
Dependent Claim
25 words
The lining material according to claim 3, wherein the fluorinated copolymer elastomer has a Mooney viscosity (ML 1+10 :100° C.) of from 5 to 120.
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) | 1988-07-22 | 1989-01-21 | 1989-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-22 | 1993-01-21 | 1993-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-22 | 1997-01-21 | 1997-07-23 | $7700.00 | Window Closed / Lapsed |