US4478973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber composition containing furnace carbon black
Assignee: Tokai Carbon Co Ltd
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Filing: 1984-01-31
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Granted: 1984-10-23
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Expires: 2004-01-31
Abstract
Abstract A rubber composition is provided which comprises 100 parts by weight of basic rubber and 25 to 250 parts by weight of furnace carbon black having the particle properties defined by an N2SA higher than 60 m2/g and a DBP higher than 108 ml/100 g and the following selective characteristic values. True specific gravity</=-0.0006xN2SA+1.8379 Tinting strength (%)>/=0.6979xN2SA-0.4278xDBP+203.3 Range of aggregate size distribution ( DELTA Dst)>/=0.6118x(Dst mode diameter)+30.
Inventors
- 👤 Shinji Misono
- 👤 Hiroaki Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:52
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; B; B60; B60C; B60C1/00; B60C1/0016; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C01; C01P; C01P2006/00; C01P2006/12; C01P2006/19; C01P2006/60
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
72 words
A rubber composition which comprises 100 parts by weight of basic rubber and 25 to 250 parts by weight of furnace carbon black having the particle properties defined by an N 2 SA higher than 60 m 2 /g and a DBP higher than 108 ml/100 g and the following selective characteristic values, True specific gravity≦-0.0006×N 2 SA+1.8379 Tinting strength (%)≧0.6979×N 2 SA-0.4278×DBP+203.3 Range of aggregate size distribution (ΔDst) ≧0.6118×(Dst mode diameter)+30.6.
Claim 2
Dependent Claim
72 words
A rubber composition which comprises 100 parts by weight of basic rubber and 25 to 250 parts by weight of furnace carbon black having the particle properties defined by an N 2 SA higher than 60 m 2 /g and a DBP higher than 108 ml/100 g and the following selective characteristic values, True specific gravity≦-0.0006×N 2 SA+1.8379 Tinting strength (%)≧0.6979×N 2 SA-0.4278×DBP+203.3 Range of aggregate size distribution (ΔDst) ≧0.6118×(Dst mode diameter)+30.6.
Claim 3
Dependent Claim
29 words
A rubber composition as set forth in claim 1, which comprises 100 parts by weight of basic rubber and 40 to 80 parts by weight of furnace carbon black.
Claim 4
Dependent Claim
25 words
A rubber composition as set forth in claim 1, wherein the basic rubber is natural rubber, styrenebutadiene rubber, polybutadiene rubber, isoprene rubber, or butyl rubber.
Claim 5
Dependent Claim
50 words
A rubber composition as set forth in claim 1, wherein the furnace carbon black is one which is produced by the process characterized by that burned gas streams which are formed by pyrolyzing a feedstock hydrocarbon oil by combustion gas of fuel oil are caused to impinge against each other.
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) | 1987-10-23 | 1988-04-23 | 1988-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-23 | 1992-04-23 | 1992-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-23 | 1996-04-23 | 1996-10-23 | $7700.00 | Window Closed / Lapsed |