Anthony Cacciola

US Patent:

44129211, Nov 1, 1983

Filed:

Apr 15, 1981

Appl. No.:

6/254488

Inventors:

Pak S. Leung - Highland Mills NY
Anthony R. Cacciola - Pleasantville NY

Assignee:

Union Carbide Corporation - Danbury CT

International Classification:

B01D 3100

US Classification:

2105002

Abstract:

A coating is applied to a microporous support in the presence of a volatile liquid capable of drawing the coating into the support and of desolvating the coating. The liquid is thereafter volatilized with the resulting dry ultrafiltration membrane being essentially crack-free and having desirable mechanical and chemical stability. The support may be pretreated with a volatile liquid, such as acetone, prior to the applying of the coating to the support. Alternately, the coating material can be dispersed in a volatile liquid, such as methanol, to form a coating suspension that is applied to the support. The coating material, preferably zirconia, will have a particle size within the range of from about 5 m. mu. to about 10. mu. , with the coating having a thickness of up to about 20. mu.