Aminoplast/polyurethane wear layer for PVC support surface
US5643677A · kind A · utility
26Cited by
9References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1994 |
| Grant date | Jul 1, 1997 |
| Priority date | — |
| Expiry date | Sep 15, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31862
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A resilient surface covering has a wear layer including a crosslinked aminoplast/polyurethane which is directly adhered to a vinyl support surface. The adhesion between the wear layer and support surface is improved by including at least 20% polyurethane by weight based on the total amount of aminoplast, polyurethane and epoxy resin in the wear layer composition, or by applying the wear layer composition to a gelled, but unfused vinyl support surface by fusing the vinyl support surface and curing the wear layer in a single step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.