Claims
- 1. A method of producing a colored polyurethane article comprising the steps of
(a) providing a binder composition comprising at least one polyol and at least isocyanate within a manifold, having an inside and outer surface, attached to a valve assembly, wherein said valve assembly is oriented such that it is simultaneously in contact with both said inside and outer surfaces of said manifold; (b) introducing a liquid colorant into said valve assembly including a ball valve; (c) introducing the colorant from within the valve assembly of step “b” into said binder composition of step “a”; and (d) allowing said binder composition constituents to react to form the desired colored polyurethane article.
- 2. The method of claim 1 wherein
said ball valve of step “b” has first and second channels; wherein each channel is exclusive of the other; wherein said first channel has a first opening and a second opening, both of which are located at different locations on the spherical ball valve surface; and wherein said second channel has a first opening and a second opening, both of which are located at different locations on the spherical ball valve surface.
- 3. The method of claim 2 wherein
said ball valve of step “b” is a spherical ball valve having an x-axis, a y-axis, and a z-axis; wherein said first channel is located on said x-axis; and wherein said second channel is located on either said y-axis or said z-axis.
- 4. The method of claim 3 wherein
said spherical ball valve comprises a first opening of said first channel at a location of approximately 0° on said x-axis and a second opening of said first channel at a location of approximately 180° on said x-axis; and wherein said first opening of said second channel is at a location on said y-axis and said second opening of said second channel is at a location on said z-axis.
- 5. The method of claim 4 wherein
said first and second channels of said spherical ball valve are straight and have the substantially the same bore size.
- 6. A colored polyurethane article produced by the method of claim 1.
- 7. A colored polyurethane article produced by the method of claim 2.
- 8. A colored polyurethane article produced by the method of claim 3.
- 9. A colored polyurethane article produced by the method of claim 4.
- 11. A colored polyurethane carpet underlay produced by the method of claim 5.
- 12. A colored polyurethane carpet underlay produced by the method of claim 1.
- 13. A colored polyurethane carpet underlay produced by the method of claim 2.
- 14. A colored polyurethane carpet underlay produced by the method of claim 3.
- 15. A colored polyurethane carpet underlay produced by the method of claim 4.
- 16. A colored polyurethane carpet underlay produced by the method of claim 5.
CROSS REFERENCE TO RELATED APPLICATIONS
1. This application is a divisional of co-pending application 09/335,197, filed on Jun. 17, 1999.
Divisions (1)
|
Number |
Date |
Country |
Parent |
09335197 |
Jun 1999 |
US |
Child |
09736696 |
Dec 2000 |
US |