Method for meniscus coating with liquid carbon dioxide

Details Method for meniscus coating with liquid carbon dioxide Method for meniscus coating with liquid carbon dioxide

1998-11-06

2000-07-04

Bareford, Katherine A.

Coating processes

Immersion or partial immersion

4274342, 4274346, B05D 118

Patent

active

060835656

ABSTRACT:
A method of coating a substrate comprises immersing a surface portion of a substrate in a liquid or supercritical first phase. The first phase comprises carbon dioxide and a coating component such as a polymer. The substrate is then withdrawn from the first phase into a distinct second phase such as a gas atmosphere so that the coating component is deposited on said surface portion. The withdrawal step is followed by separating the carbon dioxide from the coating component (e.g., by evaporation, venting, heating, etc.) so that the coating component is retained as a coating layer formed on the surface portion. Apparatus for carrying out the method by free meniscus coating, or employing a metering element such as a knife, blade, or roll, are also disclosed.

REFERENCES:
patent: 4992308 (1991-02-01), Sunol
patent: 5512058 (1996-04-01), Gavend et al.
patent: 5709910 (1998-01-01), Argyle et al.
patent: 5863612 (1999-01-01), DeSimone
Schunk et al.: Free-Meniscus Coating Processes, Liquid Film Coating, Chapman & Hall. Ed: Stephan F. Kistlec & Peter M. Schweizer (1997) Review of Dip Coating, pp. 673-708.

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