Process for making urethane coated decorative sheet-type covering material
US4176210A · kind A · utility
55Cited by
7References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1977 |
| Grant date | Nov 27, 1979 |
| Priority date | — |
| Expiry date | Apr 12, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249992
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Decorative sheet-type covering material having both PVC and polyurethane wear layers is made by first forming a sheet of gelled foamable PVC plastisol or organosol on a substrate. A layer of nonfoamable PVC plastisol or organosol is then applied to the gelled foamable layer and gelled, but not cured. A layer of polyurethane is then applied to the gelled nonfoamable layer and the entire sheet is heated to a temperature sufficient to decompose the blowing agent in the foamable layer and cure both of the PVC layers and the polyurethane layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.