Process for making a polyurethane foam sheet and composites including the sheet
US3989869A · kind A · utility
43Cited by
3References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1974 |
| Grant date | Nov 2, 1976 |
| Priority date | — |
| Expiry date | Aug 22, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/652
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A process is provided for making a polyurethane mechanical foam adapted to be used as an interlayer between a plastic surface layer and a textile, the process involving frothing a non-ionic aqueous dispersion free from emulsifying agents of a polyurethane having a particle size of less than 1 micron, said dispersion containing more than 45% by weight polyurethane and a thickening agent whereby its viscosity of the dispersion is from about 10 to about 70 seconds with a Ford Cup having a 4 mm orifice to form a foamable mixture, spreading the frothed dispersion into a foamed film, and drying the resulting product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.