US5162409A
Expired / Lapsed
US
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Tire tread rubber composition
Assignee: PIRELLI TIRE A Corp OF DELAWARE LLC
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Filing: 1991-08-02
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Granted: 1992-11-10
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Expires: 2011-08-02
Abstract
Abstract An abrasion-resistant halogenated isobutylene-based rubber composition having good traction characteristics is disclosed. In a preferred embodiment, the composition comprises a halogenated isobutylene rubber, styrene/butadiene rubber and polybutadiene rubber combined with carbon black and a silane-coupled silica filler. In automobile tire treads, tire retreads, and other anti-skid materials, the composition exhibits viscoelastic properties offering excellent traction and good rolling resistance with no loss in tire treadwear.
Inventors
- 👤 Tomasz S. Mroczkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:16
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/54; B; B60; B60C; B60C1/00; B60C1/0016; C08L; C08L9/00; C08L9/06; C08K3/00; C08K3/34; C08K3/36; C08L23/00; C08L23/26; C08L23/28; C08L23/283; Y; Y02; Y02T; Y02T10/00; Y02T10/80; Y02T10/86
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
61 words
A tire tread rubber composition which comprises 90 to 70 parts, per hundred parts rubber, a mixture of butadiene rubber and styrene-butadiene rubber, and 10 to 30 parts, per hundred parts rubber, halogenated isobutylene rubber, and further comprising 10 to 30 parts, per hundred parts rubber, silica and 1 to 8 parts, per hundred parts rubber, of an organosilane cross-linking agent.
Claim 2
Dependent Claim
61 words
A tire tread rubber composition which comprises 90 to 70 parts, per hundred parts rubber, a mixture of butadiene rubber and styrene-butadiene rubber, and 10 to 30 parts, per hundred parts rubber, halogenated isobutylene rubber, and further comprising 10 to 30 parts, per hundred parts rubber, silica and 1 to 8 parts, per hundred parts rubber, of an organosilane cross-linking agent.
Claim 3
Dependent Claim
28 words
A composition according to claim 1 comprising 20 to 60 parts, per hundred parts rubber, butadiene rubber and 20 to 60 parts, per hundred parts rubber, styrene-butadiene rubber.
Claim 4
Dependent Claim
23 words
A composition according to claim 1 wherein said halogenated isobutylene rubber is selected from the group consisting of bromobutyl, star-branched bromobutyl, and isobutylene/bromomethylstyrene.
Claim 5
Dependent Claim
14 words
A composition according to claim 1 wherein said halogenated isobutylene rubber is a terpolymer.
Claim 6
Dependent Claim
92 words
An abrasion-resistance tire tread rubber composition which comprises: (a) a rubber component comprising 10 to 30 parts, per hundred parts rubber, halogenated isobutylene rubber and 90 to 70 parts, per hundred parts rubber, a mixture of styrene-butadiene rubber and butadiene rubber; (b) 10 to 30 parts, per hundred parts rubber, silica filler; and (c) 1 to 8 parts, per hundred parts rubber, of an organosilane cross-linking agent and exhibiting higher hysteresis loss at lower temperatures and lower hysteresis loss at higher temperatures than a control composition formulated without the halogenated isobutylene rubber.
Claim 7
Dependent Claim
92 words
An abrasion-resistance tire tread rubber composition which comprises: (a) a rubber component comprising 10 to 30 parts, per hundred parts rubber, halogenated isobutylene rubber and 90 to 70 parts, per hundred parts rubber, a mixture of styrene-butadiene rubber and butadiene rubber; (b) 10 to 30 parts, per hundred parts rubber, silica filler; and (c) 1 to 8 parts, per hundred parts rubber, of an organosilane cross-linking agent and exhibiting higher hysteresis loss at lower temperatures and lower hysteresis loss at higher temperatures than a control composition formulated without the halogenated isobutylene rubber.
Claim 8
Dependent Claim
26 words
A composition according to claim 5 wherein the rubber component comprises 20 to 60 weight percent styrene-butadiene rubber and 20 to 60 weight percent butadiene rubber.
Claim 9
Dependent Claim
19 words
A composition according to claim 6 wherein said styrene-butadiene rubber has a bound styrene content of 10 to 50%.
Claim 10
Dependent Claim
16 words
A composition according to claim 6 wherein said butadiene rubber has 90% or greater cis content.
Claim 11
Dependent Claim
17 words
A composition according to claim 6 wherein said silica level is about 20 parts per hundred rubber.
Claim 12
Dependent Claim
22 words
A composition according to claim 6 wherein said halogenated rubber is a brominated rubber comprising about 20 weight percent of the rubber.
Claim 13
Dependent Claim
24 words
A composition according to claim 10 wherein said brominated rubber is selected from the group consisting of bromobutyl, star-branched bromobutyl and an isobutylene-bromomethylstyrene copolymer.
Claim 14
Dependent Claim
30 words
A composition according to claim 6 wherein said styrene-butadiene rubber comprises about 40 weight percent of the rubber and said butadiene rubber comprises about 40 weight percent of the rubber.
Claim 15
Dependent Claim
14 words
A composition according to claim 5 wherein said halogenated isobutylene rubber is a terpolymer.
Claim 16
Dependent Claim
11 words
A tire having a tread comprising the composition of claim 5.
Claim 17
Independent Claim
95 words
A method for producing a tire tread composition which comprises: (a) blending 10 to 30 weight percent halogenated isobutylene rubber with 90 to 70 weight percent of a mixture of styrene-butadiene rubber and butadiene rubber, 10 to 30 parts, per hundred parts rubber, silica and 1 to 8 parts, per hundred parts rubber, of an organosilane cross-linking agent and effective amounts of processing aids to form a mixture; (b) adding antioxidants, antiozonants, and effective amounts of processing aids; and (c) blending into said mixture an effective amount of cross-linking materials, cure accelerators, and cure activators.
Claim 18
Independent Claim
95 words
A method for producing a tire tread composition which comprises: (a) blending 10 to 30 weight percent halogenated isobutylene rubber with 90 to 70 weight percent of a mixture of styrene-butadiene rubber and butadiene rubber, 10 to 30 parts, per hundred parts rubber, silica and 1 to 8 parts, per hundred parts rubber, of an organosilane cross-linking agent and effective amounts of processing aids to form a mixture; (b) adding antioxidants, antiozonants, and effective amounts of processing aids; and (c) blending into said mixture an effective amount of cross-linking materials, cure accelerators, and cure activators.
Claim 19
Dependent Claim
34 words
A method according to claim 15 wherein the blend in the first step comprises equal weight percent concentrations of styrene-butadiene rubber and butadiene rubber, and 10 to 30 weight percent of a halogenated rubber.
Claim 20
Dependent Claim
17 words
A method according to claim 15 wherein tread grade carbon black is added in the first step.
Claim 21
Dependent Claim
26 words
A method according to claim 15 wherein said halogenated isobutylene rubber is a brominated rubber selected from the group consisting of bromobutyl, star-branched bromobutyl and isobutylene/bromomethylstyrene.
Claim 22
Dependent Claim
19 words
A tire having a tire tread employing the tire tread composition produced according to the method of claim 15.
Claim 23
Dependent Claim
60 words
A tire having a tire tread comprising a rubber composition which comprises 10 to 30 parts, per hundred parts rubber, isobutylene/para-bromomethylstyrene rubber and 90 to 70 parts, per hundred parts rubber, a mixture of styrene-butadiene rubber and butadiene rubber; 10 to 30 parts, per hundred rubber, silica; and 1 to 8 parts, per hundred parts rubber, an organosilane cross-linking agent.
Claim 24
Dependent Claim
60 words
A tire having a tire tread comprising a rubber composition which comprises 10 to 30 parts, per hundred parts rubber, isobutylene/para-bromomethylstyrene rubber and 90 to 70 parts, per hundred parts rubber, a mixture of styrene-butadiene rubber and butadiene rubber; 10 to 30 parts, per hundred rubber, silica; and 1 to 8 parts, per hundred parts rubber, an organosilane cross-linking agent.
Claim 25
Dependent Claim
35 words
A tire according to claim 20 wherein the tire tread rubber composition further comprises 20 to 60 parts, per hundred parts rubber, styrene/butadiene rubber and 20 to 60 parts, per hundred parts rubber, butadiene rubber.
Claim 26
Dependent Claim
11 words
A composition according to claim 3 wherein the isobutylene/bromomethylstyrene is isobutylene/para-bromomethylstyrene.
Claim 27
Dependent Claim
13 words
A composition according to claim 5 wherein the halogenated isobutylene rubber is isobutylene/para-bromomethylstyrene.
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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) | 1995-11-10 | 1996-05-11 | 1996-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-11-10 | 2000-05-11 | 2000-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-11-10 | 2004-05-11 | 2004-11-10 | $7700.00 | Window Closed / Lapsed |