High resiliency polyurethane foams with improved static fatigue properties
US5157056A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 17, 1991 |
| Grant date | Oct 20, 1992 |
| Priority date | — |
| Expiry date | Jul 17, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/51
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A novel high resiliency (HR) polyurethane resin foam composition is provided which contains phosphorus compounds to improve the static fatigue properties thereof. An unusual benefit of using certain phosphorus compounds in HR foams is that improved compression set characteristics are obtained. As might be expected, flammability properties are also improved. Some preferred phosphorus additives include, but are not limited to phosphates, phosphonates, phosphites and phosphine oxides such as tri(.beta.-chloroethyl)phosphate; tri(.beta.-chloropropyl)phosphate; dichloroethyl methylphosphate; tetrakis(2-chloroethyl) ethylene diphosphate; dimethyl methylphosphonate; diphenyl methylphosphate; triethylphosphate; tricrysylphosphate (TCP); triphenylphosphite; triethylphosphite; triethylphosphine oxide; triphenylphosphine oxide; and mixtures thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.