Accession Number : AD0470146

Title :   ADVANCED POLYMER RESEARCH TO DEVELOP POLYMERS FOR USE IN COATINGS EXPOSED O EXTREME ENVIRONMENTS.

Descriptive Note : Progress rept. no. 3, 15 Dec 64-15 Jun 65,

Corporate Author : NAVAL AIR ENGINEERING CENTER PHILADELPHIA PA AERONAUTICAL MATERIALS LAB

Personal Author(s) : Howerton,W. W.

Report Date : 15 JUN 1965

Pagination or Media Count : 32

Abstract : This third progress report is a continuation of the research to develop a tough, stable polymer that will withstand severe environments including high temperature exposure to 500 F, and which after being formulated into paint, is air-drying when spray-applied. Polymer synthesis continues to be concentrated primarily on aromatic type structures for outstanding heat resistance, and more particularly with Bisphenol A type polyphenyl ester polymers. To date, modifications of this type polymer appear to hold the most promise for meeting the many necessary requirements of a high temperature coating polymer. Relative to Bisphenol A type polyphenyl ester coating polymers, a breakthrough has been obtained in high temperature performance, from 500 F to 750 F, by thermal cross-linking. In practice, this reaction should occur naturally during aircraft operation at higher speeds, as skin temperatures increase. New high molecular weigh Fluoro-Bisphenol A (Hexafluoroacetone Bisphenol A) polyphenyl ester polymers have been developed which exhibit greatly improved resistance to discoloration at elevated temperature. As one of the factors of weathering, water resistance of polymers has been improved in that clear coatings exposed for several months to water and high humidity conditions are completely unaffected. (Author)

Descriptors :   (*POLYMERS, COATINGS), (*COATINGS, POLYMERS), (*HEAT RESISTANT MATERIALS, STABILITY), POLYMERIZATION, HIGH TEMPERATURE, AROMATIC COMPOUNDS, ENVIRONMENTAL TESTS, AIRCRAFT FINISHES, VISCOSITY, POLYESTER PLASTICS

Distribution Statement : APPROVED FOR PUBLIC RELEASE