Loading...
Please wait, while we are loading the content...
Similar Documents
Tire with Tread for Low Temperature Performance and Wet Traction
| Content Provider | The Lens |
|---|---|
| Abstract | This invention relates to a tire with tread for promoting a combination of winter service at low temperatures and for promoting wet traction. The tread is of a rubber composition containing low Tg styrene/butadiene elastomer and cis 1,4-polybutadiene rubber, along with high Tg liquid styrene/butadiene polymer, traction resin and vegetable triglyceride oil. |
| Related Links | https://www.lens.org/lens/patent/011-240-713-643-391/frontpage |
| Language | English |
| Publisher Date | 2017-05-16 |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Patent |
| Jurisdiction | United States of America |
| Date Applied | 2015-06-24 |
| Agent | Henry C. Young, Jr. |
| Applicant | Goodyear Tire & Rubber |
| Application No. | 201514748328 |
| Claim | A pneumatic tire having a circumferential rubber tread of a rubber composition comprised of, based on parts by weight per 100 parts by weight elastomer (phr): (A) diene-based elastomers comprised of; (1) about 40 to about 90 phr of a styrene/butadiene elastomer having a Tg in a range of from at least −50° C. to about −85° C., (2) about 10 to about 60 phr of high cis 1,4-polybutadiene rubber having a Tg in a range of from about −100° C. to about −105° C. and a cis 1,4-isometric content of at least about 95 percent, together with (3) about 3 to about 50 phr of low molecular weight liquid styrene/butadiene polymer having a Tg in a range of from about −30° C. to about 0° C., and (B) about 50 to about 250 phr of rubber reinforcing filler comprised of a combination of precipitated silica and rubber reinforcing carbon black in a ratio of precipitated silica to rubber reinforcing carbon black of at least 9/1, together with silica coupling agent having a moiety reactive with hydroxyl groups on said precipitated silica and another different moiety interactive with said diene-based elastomers and polymer, (C) about 5 to about 45 phr of resin comprised of styrene-alphamethylstyrene resin having a softening point (ASTM E28) in a range of from about 60° C. to about 125° C., and (D) about 5 to about 50 phr of vegetable triglyceride oi The tire of claim 1 wherein the tread rubber composition further contains up to 25 phr of at least one additional low Tg diene based elastomer comprised of cis 1,4-polyisoprene. The tire of claim 1 wherein said styrene/butadiene elastomer is a functionalized elastomer containing at least one of siloxane, amine and thiol functional groups reactive with hydroxyl groups on said precipitated silica. The tire of claim 1 wherein said styrene/butadiene elastomer is tin coupled. The tire of claim 3 wherein said functionalized styrene/butadiene elastomer is a tin coupled elastomer. The tire of claim 1 wherein said tread rubber composition further contains up to 25 phr of at least one additional diene based elastomer comprised of at least one of cis 1,4-polyisoprene, isoprene/butadiene, and styrene/isoprene rubber. The tire of claim 1 wherein said silica coupling agent is comprised of a bis(3-triethoxysilylpropyl) polysulfide containing an average of from about 1 to about 4 connecting sulfur atoms in its polysulfidic bridge or is comprised of an alkoxyorganomercaptosilane. The tire of claim 1 wherein said precipitated silica and silica coupling agent are pre-reacted to form a composite thereof prior to their addition to the rubber composition. The tire of claim 1 wherein said precipitated silica and silica coupling agent are added to the rubber composition and reacted together in situ within the rubber composition. The tire of claim 1 wherein said styrene-alphamethylstyrene resin has a styrene content of from about 10 to about 30 percent. The tire of claim 1 wherein said tread is provided as being sulfur cured. The tire of claim 3 wherein said tread is provided as being sulfur cured. The tire of claim 5 wherein said tread is provided as being sulfur cured. The tire of claim 7 wherein said tread is provided as being sulfur cured. The tire of claim 10 wherein said tread is provided as being sulfur cured. |
| CPC Classification | COMPOSITIONS OF MACROMOLECULAR COMPOUNDS Vehicle Tyres;Tyre Inflation;Tyre Changing;Connecting Valves To Inflatable Elastic Bodies In General;Devices Or Arrangements Related To Tyres Use of inorganic or non-macromolecular organic substances as compounding ingredients |
| Examiner | Susannah Chung Robert T Butcher |
| Extended Family | 151-121-211-343-350 011-240-713-643-391 142-681-157-121-456 090-185-871-287-560 |
| Patent ID | 9650503 |
| Inventor/Author | Sandstrom Paul Harry Thielen Georges Marcel Victor Steiner Pascal Patrick Isitman Nihat Ali |
| IPC | C08L91/00 B60C1/00 C08L9/06 C09D11/02 |
| Status | Active |
| Owner | Goodyear Tire & Rubber Company The |
| Simple Family | 142-681-157-121-456 011-240-713-643-391 151-121-211-343-350 090-185-871-287-560 |
| CPC (with Group) | C08L9/06 B60C1/0016 C08K3/36 C08L9/00 C08L45/02 C08L57/02 C08L91/00 C08L2205/02 C08L2205/025 C08L2205/03 C08L2205/035 |
| Issuing Authority | United States Patent and Trademark Office (USPTO) |
| Kind | Patent/New European patent specification (amended specification after opposition procedure) |
