Very low density molded polyurethane foams via isocyanate-terminated prepolymers
US5708045A · kind A · utility
12Cited by
7References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1997 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Mar 26, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2110/0083
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Very soft, very low density, all water-blown polyurethane foams are prepared by reacting an isocyanate-terminated prepolymer with from 30% to 150% stoichiometric excess of water. The foams have molded densities less than or equal to 1.5 lb/ft.sup.3 and softness, as measured by 25% ILD of less than or equal to 15 lbs., yet retain excellent resiliency, tear strength and elongation. The foams are suitable for use in cushioning applications such as those traditionally employing polyester fiberfill.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.