Process for producing froth polyurethane foam
US5604267A · kind A · utility
19Cited by
10References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 30, 1995 |
| Grant date | Feb 18, 1997 |
| Priority date | — |
| Expiry date | Aug 30, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31554
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
High quality, consistent polyurethane froth foams, both filled and unfilled, are prepared by directing polyol, isocyanate, and optionally other polyurethane-forming ingredients to a high pressure mix head prior to introducing the mixture to a froth foaming head. Changes in stoichiometry may be made rapidly without shut-down. An in-line blender incorporated filler into the polyol stream minimizing density differentials normally encountered in the holding tank, maintaining low and reproducible viscosity, and allowing for greater amounts of filler than otherwise possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.