Semi-continuous method and apparatus for forming a heated and pressurized mixture of fluids in a predetermined proportion
US5098194A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1990 |
| Grant date | Mar 24, 1992 |
| Priority date | — |
| Expiry date | Jun 27, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29B7/002
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention is directed to apparatus and methods for effectively supplying, feeding, measuring, proportioning, mixing, pressurizing, and heating on a semi-continuous basis, a plurality of fluids. Preferably, the fluids comprise at least one substantially non-compressible fluid, such as coating formulation, and at least one substantially compressible fluid, such as carbon dioxide, to form a substantially accurately proportionated coating admixture in the supercritical state of the compressible fluid for spraying the combined mixture through a spraying means onto a substrate to produce a coating. The process employs vessels having a known displacement volume to feed and proportion the fluids. The pressurization, mixing and heating is accomplished in an oscillation loop wherein the mixture is pressurized and heated while in such oscillation loop. A spray gun connected to the oscillation loop is used to spray the mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.