Process for preparing polyurethane-backed substrate
US4913958A · kind A · utility
28Cited by
1References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1989 |
| Grant date | Apr 3, 1990 |
| Priority date | — |
| Expiry date | Jun 29, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/649
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Substrates having successive layers of a cellular polyurethane and a noncellular polyurethane are prepared using certain siloxane-polyether block copolymers in the noncellular polyurethane formulation. The use of the block copolymer reduces or eliminates the formation of a bubble line at the interface of the polyurethane layers, thereby improving physical and cosmetic properties of the carpet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.