Patents
US 12703784 B2: Tire tread rubber composition comprising rice husk ash silica
- Granted
- 2026-08-11
- Filed
- 2022-11-30 application 18071989
- Type
- Utility · 15 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
This invention is based upon the unexpected discovery that rice husk ash silica (synthetic amorphous silica from rice husk ash) provides an exceptionally good combination of properties when used in certain tire tread rubber formulations, such as an excellent combination of traction, tread-wear, and rolling resistance. These tread rubber formulations are comprised of a blend of high cis-1,4-polybutadiene rubber and a solution styrene-butadiene rubber which is preferably functionalized with amine groups, siloxy groups, thiol groups, carboxyl groups, or groups that are reactive with hydroxyl groups present on the precipitated rice husk ash silica. The use of such rice husk silica as a reinforcing-filler in rubber formulations is also highly desirable because such silica is a sustainable resource (bio-renewable) which is derived from an agricultural waste material which would otherwise be discarded as an undesirable waste product.
Source: PTBLXML, file of 2026-08-11 (ipgb20260811.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| The Goodyear Tire & Rubber Company 2,292 patents | US company or organization | Akron, OH | PTBLXML, file of 2026-08-11 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Bruce Raymond Hahn | Hudson, OH | 29 | PTBLXML, file of 2026-08-11 | |
| George Jim Papakonstantopoulos | Medina, OH | 27 | PTBLXML, file of 2026-08-11 | |
| Xiaoping Yang | Streetsboro, OH | 26 | PTBLXML, file of 2026-08-11 | |
| Kuo-Chih Hua | Richfield, OH | 7 | PTBLXML, file of 2026-08-11 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C08K | Use of inorganic or non-macromolecular organic substances as compounding ingredients | C08K3/36 | PTBLXML, file of 2026-08-11 |
| C08L | Compositions of macromolecular compounds | C08L9/06 | PTBLXML, file of 2026-08-11 |
| B60C | Vehicle tyres; tyre inflation; tyre changing; connecting valves to inflatable elastic bodies in general; devices or arrangements related to tyres | B60C1/0016 | PTBLXML, file of 2026-08-11 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
No recorded assignments or security interests on file for this patent.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.