Accession Number : AD0434213

Title :   HYDROPHOBIC AND OLEOPHOBIC FLUOROPOLYMER COATINGS OF EXTREMELY LOW SURFACE ENERGY.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Bernett,Marianne K. ; Zisman,W. A.

Report Date : 14 FEB 1964

Pagination or Media Count : 10

Abstract : A comparison of the critical surface tension of wetting of new but commercially available polymeric solids revealed that a group of polyfluoroesters had the lowest values of any plastics or other solids yet reported. In order to assess their possible utility in cert/in new potential naval applications, experimental studies were made on the effect of high humidity and immersion in organic liquids on thin coatings of the two fluorinated polyesters. No changes in coating adhesion to the underlying resin or metal surface were found after such exposures. Prevention of spreading by fine instrument oils on surfaces of substances such as stainless steel, sapphire, and Pyrex glass was also investigated. The results showed these polymer coatings will have future usefulness in several new types of applications among which are prevention of liquid penetration in electrical, electronic, and mechanical equipment; parting agents or abhesives for mold release applications; barriers to prevent oil spreading in fine instruments; and reduction of surface electrical leakage. (Author)

Descriptors :   (*PLASTIC COATINGS, SURFACE PROPERTIES), (*HALOCARBON PLASTICS, SURFACE PROPERTIES), (*SURFACE ACTIVE SUBSTANCES, COATINGS), ESTERS, FLUORINE COMPOUNDS, HUMIDITY, LUBRICANTS, PROTECTIVE TREATMENTS, PLASTICS, METALS, GLASS, SAPPHIRE, STABILITY, COMPATIBILITY

Distribution Statement : APPROVED FOR PUBLIC RELEASE