Polyurethane foam of increased rigidity
US4082704A · kind A · utility
3Cited by
13References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1976 |
| Grant date | Apr 4, 1978 |
| Priority date | — |
| Expiry date | Jul 6, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249994
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention provides a polyurethane foam of increased rigidity. The invention is provided by impregnating a flexible polyurethane foam with a thermosetting melamine, urea or benzoguanamine resin and a cross-linker, and then reacting the resin with the cross-linker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.