Patent US3789871A successfully refreshed from Google Patents.
Patent US4096207A successfully refreshed from Google Patents.
US4096207A
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Elastomer compositions with improved abrasion resistance
Assignee: Enichem Elastomeri SpA
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Filing: 1977-01-03
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Granted: 1978-06-20
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Expires: 1997-01-03
Abstract
Abstract Use of polytetrafluoroethylene (PTFE) to improve the abrasion resistance of elastomers and more particularly, elastomer compositions, containing fibrous PTFE, which exhibit improved resistance to abrasion, and to a method for improving the abrasion resistance of elastomers by the incorporation therein of fibrous PTEF.
Inventors
- 👤 Robert Saxon
- 👤 Jack Horstmann Thelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:23
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/02; C08K; C08K7/00; C08K7/02; C08L33/00; C08L33/04; C08L33/06; C08L33/08; C08L33/18; C08L27/00; C08L27/02; C08L27/12; C08L27/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
26 words
A composition of matter comprising a vulcanizable polyacrylate elastomer containing from about 1 to 4 parts per hundred parts thereof of particulate polytetrafluoroethylene in fibrous form.
Claim 2
Dependent Claim
26 words
A composition of matter comprising a vulcanizable polyacrylate elastomer containing from about 1 to 4 parts per hundred parts thereof of particulate polytetrafluoroethylene in fibrous form.
Claim 3
Dependent Claim
36 words
A composition according to claim 1 wherein said polyacrylate elastomer is a copolymer of a major proportion of one or more esters of acrylic acid and a minor proportion of an active halogen containing vinyl monomer.
Claim 4
Dependent Claim
16 words
A composition according to claim 2 wherein said active halogen containing vinyl monomer is vinyl chloroacetate.
Claim 5
Dependent Claim
57 words
A method for improving the abrasion resistance of vulcanizable elastomer as in claim 1, which comprises incorporating into said elastomer from about 1 to 5 parts, per hundred parts thereof, of particulate non-fibrous polytetrafluoroethylene and subjecting said elastomer and polytetrafluoroethylene to conditions of high shear, such that the resulting elastomer composition contains said polytetrafluoroethylene in fibrous form.
Claim 6
Dependent Claim
21 words
A method as in claim 4 wherein said non-fibrous polytetrafluoroethylene is in the form of an aqueous dispersion or dry powder.
Claim 7
Dependent Claim
35 words
The method of claim 4 wherein said polyacrylate elastomer is a copolymer of a major proportion of one or more esters of acrylic acid and a minor proportion of an active halogen containing vinyl monomer.
Claim 8
Dependent Claim
15 words
The method of claim 6 wherein said active halogen containing vinyl monomer is vinyl chloroacetate.
Claim 9
Dependent Claim
14 words
An abrasion resistant elastomer composition resulting when the composition of claim 4 is vulcanized.
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) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |