Polyurethane carpet backing catalyzed with organoiron and organobismuth catalysts
US4611044A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1985 |
| Grant date | Sep 9, 1986 |
| Priority date | — |
| Expiry date | May 28, 2005 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06N2209/067
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
This invention is an improvement in a process for preparing a polyurethane backed substrate whereby a reacting polyurethane forming mixture comprising at least one polyahl and at least one polyisocyanate as applied to a substrate and subsequently curing thereon to form an attached polyurethane backing. The improvement which is this invention comprises employing an organoiron or organobismuth catalyst for said polyurethane forming mixture. The organoiron or organobismuth catalyst is employed in an amount such that the polymer forming mixture exhibits the viscosity of not greater than about 20,000 cps 2 minutes after the polyahl and polyisocyanates are contacted in the presence of said catalyst at 20.degree.-50.degree. C. and the polyurethane forming mixture cures to a tack free state at an elevated temperature in the presence of said catalyst in less than about 8 minutes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.