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Patent US4514541A successfully refreshed from Google Patents.
US4514541A
Expired / Lapsed
US
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Fiber containing particulate elastomeric composition
Assignee: EIDP Inc
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Filing: 1984-05-21
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Granted: 1985-04-30
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Expires: 2004-05-21
Abstract
Abstract A particulate elastomeric composition having a density ratio of 0.1 to 0.4 comprising 5-75% by weight of an elastomer, 15-65% by weight of a filler and 10-60% by weight of aramid pulp and a solution process for its preparation. The composition is useful as a masterbatch for the introduction of aramid pulp into elastomeric articles.
Inventors
- 👤 Arnold Frances
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:35
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08K; C08K7/00; C08K7/02; C08G; C08G2261/00; C08G2261/30; C08G2261/31; C08G2261/312
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
86 words
Process for preparing a particulate elastomeric composition having a density ratio of 0.1 to 0.4 exclusive of any organic solvent which may be present whereby 10 to 60 parts of aramid pulp and 15 to 65 parts of reinforcing filler are thoroughly mixed, a solution of elastomer in an organic solvent is added with continued stirring, the quantity of solution being sufficient to provide 5 to 75 parts elastomer, all parts to add up to 100 parts exclusive of organic solvent, the elastomeric particles are removed.
Claim 2
Dependent Claim
86 words
Process for preparing a particulate elastomeric composition having a density ratio of 0.1 to 0.4 exclusive of any organic solvent which may be present whereby 10 to 60 parts of aramid pulp and 15 to 65 parts of reinforcing filler are thoroughly mixed, a solution of elastomer in an organic solvent is added with continued stirring, the quantity of solution being sufficient to provide 5 to 75 parts elastomer, all parts to add up to 100 parts exclusive of organic solvent, the elastomeric particles are removed.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the aramid pulp is poly(p-phenylene terephthalamide)pulp.
Claim 4
Dependent Claim
15 words
The process of claim 2 wherein the pulp has a length of 0.5 4.0 mm.
Claim 5
Dependent Claim
11 words
The process of claim 1 wherein the elastomer is a fluoroelastomer.
Claim 6
Dependent Claim
10 words
The process of claim 1 wherein the elastomer is polychloroprene.
Claim 7
Dependent Claim
11 words
The process of claim 1 wherein the elastomer is chlorosulfonated polyethylene.
Claim 8
Dependent Claim
13 words
The process of claim 1 wherein the elastomer is an ethylene/propylene diene rubber.
Claim 9
Dependent Claim
11 words
The process of claim 1 wherein the elastomer is natural rubber.
Claim 10
Dependent Claim
10 words
The process of claim 1 wherein the elastomer is polyisoprene.
Claim 11
Dependent Claim
11 words
The process of claim 1 wherein the elastomer is an SBR.
Claim 12
Dependent Claim
11 words
The process of claim 1 wherein the elastomer is nitrile rubber.
Claim 13
Dependent Claim
12 words
The process of claim 1 wherein the elastomer is an ethylene-acrylic rubber.
Claim 14
Dependent Claim
15 words
The process of claim 1 wherein a solution of 20-30% by weight elastomer is used.
Claim 15
Dependent Claim
60 words
A particulate elastomeric composition produced by the process of claim 1 comprising, exclusive of any organic solvent which may be present, 5-75% by weight of an elastomer, 15-65% by weight of a reinforcing filler and 10-60% by weight of aramid pulp, said composition having a density ratio of 0.1 to 0.4 exclusive of any organic solvent which may be present.
Claim 16
Dependent Claim
23 words
The composition of claim 14 wherein the composition contains 10-50% by weight elastomer, 30-50% by weight reinforcing filler and 25-50% by weight pulp.
Claim 17
Dependent Claim
28 words
Process for preparing a reinforced elastomeric article wherein the particulate elastomeric composition of claim 14 is blended with the same or another elastomer using conventional rubber compounding techniques.
References Cited (Backward Citations)
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US3969568A
Cited
US4255817A
Cited
EP0020273A1
Cited
JPS58154743A
Cited
JPS58127761A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-29 | 1988-10-29 | 1989-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-29 | 1992-10-29 | 1993-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-29 | 1996-10-29 | 1997-04-30 | $7700.00 | Window Closed / Lapsed |