High resilience, high clarity polyurethane elastomer
US6221999A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1999 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Sep 10, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A cast polyurethane elastomer possessing a resilience of at least about 50 percent and a clarity index of at least 80 percent is obtained by subjecting to polyurethane elastomer-forming conditions a polyurethane elastomer-forming reaction mixture comprising: PA1 a) an isocyanate selected from the group consisting of diphenyl methane diisocyanate, isocyanate obtained from the reaction of polyether diol with MDI and mixtures thereof wherein at least a major proportion by weight of the diphenyl methane diisocyanate is the 4,4'-diphenyl methane diisocyanate isomer; PA1 b) at least one polyether diol; and, PA1 c) at least one diol chain extender of the general formula: EQU HO--(CH.sub.2).sub.x --OH wherein x is an integer from 5 to about 16.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.