Pebble-based surfacing materials
US8962750B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 2012 |
| Grant date | Feb 24, 2015 |
| Priority date | — |
| Expiry date | Dec 5, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31598
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Pebble or granular based elastomeric surfacing materials that include an aliphatic thermoplastic polyurethane based pebble or granule bonded together with a two-part aliphatic polyurethane binder are provided. In one embodiment, an A side of the two-part binder has at least one polyol, and a B side of the two-part binder has multiple isocyanates. The multiple isocyanates can include for example hydrogenated methylene diphenyldisocyanate and hexamethylene diisocyanate. The A side and the B side of the binder are utilized to bond the pebbles together to form a surface that can be either porous or non-porous. In another embodiment, an A side of a two-part binder includes multiple polyols. The multiple polyols can include for example esterified ricinoleic acid polyols and caprolactone polyols. The A side of the two-part binder can be combined with a B side of the two-part binder and pebbles to form a non-porous surface. In yet another embodiment, a pebble-based surface is utilized as a wear layer in a multi-layer safety surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.