Polyurethane/urea elastomer material for game ball applications
US9862795B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2015 |
| Grant date | Jan 9, 2018 |
| Priority date | — |
| Expiry date | Aug 6, 2035 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2102/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed herein is a composition for use in the preparation of a Lacrosse sport ball, the composition comprising a prepolymer, the prepolymer comprising a multifunctional polyisocyanate and one or more polyols having a molecular weight of from about 1000 Daltons to about 5000 Daltons, and a curative comprising an amine or an additional polyol or a combination thereof. A Lacrosse ball formed from the composition exhibits a ball compression of from about 180 pounds to about 210 pounds or from about 90 pounds to about 210 pounds when tested in accordance with ND 049-12m12 Section 5.3 Ball Compression, and wherein the molded spherical ball exhibits a ball coefficient of restitution COR of from about 0.60 to about 0.70 or from about 0.50 to about 0.75 when tested in accordance with ND 049-12m12 Section 5.4 Ball Coefficient of Restitution COR.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.