US3884285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasion-resistant rubber compositions
Assignee: PPG Industries Inc
•
Filing: 1973-10-11
•
Granted: 1975-05-20
•
Expires: 1993-10-11
Abstract
Abstract Abrasion-resistant vulcanized rubber compositions which are also resistant to heat build-up are provided which are useful as tire treads and subtreads for vehicles, e.g., automobiles. The compounds comprise the vulcanizate of a rubber polymer, a finelydivided reinforcing siliceous pigment, and an organic coupling agent having at least one nitrogen functional group that bonds to the siliceous pigment and at least one sulfur functional group that bonds to the rubber polymer.
Inventors
- 👤 David B Russell
- 👤 Jr Thomas J Doran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:43
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; B; B60; B60C; B60C1/00; B60C1/0016; C08K3/00; C08K3/34; C08K5/37
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
98 words
A VULCANIZED RUBBER COMPOSITION COMPRISING THE VULCANIZATE OF A VULCANIZABLE RUBBER POLYMER, FROM 5 TO 100 PARTS, PER 100 PARTS OF RUBBER POLYMER, OF FINELY-DIVIDED REINFORCING SILICEOUS PIGMENT, AND BETWEEN 0.1 AND 15 PARTS, PER 100 PARTS OF RUBBER POLYMER OF AN ORGANIC COUPLING AGENT THE FUNCTIONAL GROUPS OF WHICH CONSISTS ESSENTIALLY OF AT LEAST ONE SULFUR FUNCTIONAL GROUP CAPABLE OF BONDING TO THE RUBBER POLYMER AND AT LEAST ONE NITROGEN FUNCTIONAL GROUP CAPABLE OF BONDING TO THE SILICEOUS PIGMENT PROVIDED THAT WHEN THE NITROGEN FUNCTIONAL GROUP IS AMINO THE COUPLING AGENT HAS AT LEAST TWO SUCH GROUPS.
Claim 2
Dependent Claim
98 words
A VULCANIZED RUBBER COMPOSITION COMPRISING THE VULCANIZATE OF A VULCANIZABLE RUBBER POLYMER, FROM 5 TO 100 PARTS, PER 100 PARTS OF RUBBER POLYMER, OF FINELY-DIVIDED REINFORCING SILICEOUS PIGMENT, AND BETWEEN 0.1 AND 15 PARTS, PER 100 PARTS OF RUBBER POLYMER OF AN ORGANIC COUPLING AGENT THE FUNCTIONAL GROUPS OF WHICH CONSISTS ESSENTIALLY OF AT LEAST ONE SULFUR FUNCTIONAL GROUP CAPABLE OF BONDING TO THE RUBBER POLYMER AND AT LEAST ONE NITROGEN FUNCTIONAL GROUP CAPABLE OF BONDING TO THE SILICEOUS PIGMENT PROVIDED THAT WHEN THE NITROGEN FUNCTIONAL GROUP IS AMINO THE COUPLING AGENT HAS AT LEAST TWO SUCH GROUPS.
Claim 3
Dependent Claim
23 words
The composition of claim 1 wherein the nitrogen functional group is selected from the group consisting of isocyanato, isothiocyanato, carbodi-imido and cyclic imino.
Claim 4
Dependent Claim
15 words
The composition of claim 1 wherein the nitrogen functional group is amino or imino group.
Claim 5
Dependent Claim
14 words
The composition of claim 3 wherein the sulfur functional group is the mercapto group.
Claim 6
Dependent Claim
22 words
The composition of claim 3 wherein the nitrogen functional group is primary, secondary, or tertiary amino groups and mixtures of such groups.
Claim 7
Dependent Claim
18 words
The composition of claim 5 wherein the coupling agent contains at least 5 nitrogen functional groups per molecule.
Claim 8
Dependent Claim
20 words
The composition of claim 1 wherein the ratio of nitrogen functional groups to sulfur functional groups is at least 2:1.
Claim 9
Dependent Claim
13 words
The composition of claim 1 wherein the coupling agent is a mercaptoalkylated poly(alkyleneimine).
Claim 10
Dependent Claim
12 words
The composition of claim 8 wherein the coupling agent is mercaptoethylated polyethyleneimine.
Claim 11
Dependent Claim
12 words
The composition of claim 1 wherein the rubber polymer is styrene-butadiene rubber.
Claim 12
Dependent Claim
100 words
A vulcanized rubber composition comprising the vulcanizate of a vulcanizable rubber polymer, from about 40 to about 90 parts of finely-divided reinforcing siliceous pigment and from about 0.1 to about 15 parts of an organic coupling agent the functional groups of which consist essentially of at least one sulfur functional group capable of bonding to the rubber polymer and at least one nitrogen functional group capable of bonding to the siliceous pigment, said amounts being based on 100 parts of rubber polymer provided that when the nitrogen functional group is amino the coupling agent has at least two such groups.
Claim 13
Dependent Claim
100 words
A vulcanized rubber composition comprising the vulcanizate of a vulcanizable rubber polymer, from about 40 to about 90 parts of finely-divided reinforcing siliceous pigment and from about 0.1 to about 15 parts of an organic coupling agent the functional groups of which consist essentially of at least one sulfur functional group capable of bonding to the rubber polymer and at least one nitrogen functional group capable of bonding to the siliceous pigment, said amounts being based on 100 parts of rubber polymer provided that when the nitrogen functional group is amino the coupling agent has at least two such groups.
Claim 14
Dependent Claim
20 words
The composition of claim 11 wherein the ratio of nitrogen functional groups to sulfur functional groups is at least 2:1.
Claim 15
Dependent Claim
13 words
The composition of claim 11 wherein the coupling agent is a mercaptoalkylated poly(alkyleneimine).
Claim 16
Dependent Claim
12 words
The composition of claim 11 wherein the coupling agent is mercaptoethylated polyethyleneimine.
Claim 17
Dependent Claim
12 words
The composition of claim 14 wherein the rubber polymer is styrene-butadiene rubber.
Claim 18
Dependent Claim
34 words
The composition of claim 11 wherein the coupling agent is present in amounts of from 1 to 8 parts per 100 parts of rubber polymer and the nitrogen functional group is amino or imino.
Claim 19
Dependent Claim
22 words
The composition of claim 16 wherein the nitrogen functional group is primary, secondary, or tertiary amino groups and mixtures of such groups.
Claim 20
Dependent Claim
109 words
A rubber tire having as the tread, subtread or tread and subtread thereof a vulcanizate of a composition comprising a vulcanizable rubber polymer, from 5 to 100 parts of finely-divided reinforcing siliceous pigment and from about 0.1 to about 15 parts of an organic coupling agent the functional groups of which consist essentially of at least one sulfur functional group capable of bonding to the rubber polymer and at least one nitrogen functional group capable of bonding to the siliceous pigment, said amounts being based on 100 parts of rubber polymer, provided that when the nitrogen functional group is amino the coupling agent has at least two such groups.
Claim 21
Dependent Claim
109 words
A rubber tire having as the tread, subtread or tread and subtread thereof a vulcanizate of a composition comprising a vulcanizable rubber polymer, from 5 to 100 parts of finely-divided reinforcing siliceous pigment and from about 0.1 to about 15 parts of an organic coupling agent the functional groups of which consist essentially of at least one sulfur functional group capable of bonding to the rubber polymer and at least one nitrogen functional group capable of bonding to the siliceous pigment, said amounts being based on 100 parts of rubber polymer, provided that when the nitrogen functional group is amino the coupling agent has at least two such groups.
Claim 22
Dependent Claim
23 words
The rubber tire of claim 18 wherein the nitrogen functional group is primary, secondary, or tertiary amino groups and mixtures of such groups.
Claim 23
Dependent Claim
19 words
The Rubber tire of claim 19 wherein the coupling agent contains at least 5 nitrogen functional groups per molecule.
Claim 24
Dependent Claim
21 words
The rubber tire of claim 18 wherein the ratio of nitrogen functional groups to sulfur functional groups is at least 2:1.
Claim 25
Dependent Claim
14 words
The rubber tire of claim 18 wherein the coupling agent is a mercaptoalkylated poly(alkyleneimine).
Claim 26
Dependent Claim
20 words
The rubber tire of claim 18 wherein the coupling agent is mercaptoethylated polyethyleneimine and the rubber polymer is styrene-butadiene rubber.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |