Accession Number : AD0727750

Title :   Development of Rain-Erosion-Resistant Coatings for High-Speed Aircraft.

Descriptive Note : Final rept. 15 Jan 70-14 Jan 71,

Corporate Author : SOUTHERN RESEARCH INST BIRMINGHAM ALA

Personal Author(s) : Tanquary,A. C. ; Burks,Robert E. , Jr ; Jackson,M. Virginia

Report Date : MAR 1971

Pagination or Media Count : 39

Abstract : A polymer prepared as a prospective rain- erosion-resistant coating from hexafluoroacetone, propylene, and bis(dimethylamino)-dimethylsilane had a glass-transition temperature of -50 C, and it had good resistance to heat and aliphatic or aromatic hydrocarbons. However, it was not successfully cured to an elastomer. A POLYMER PREPARED FROM 1,4- BIS(dimethylhydroxysilyl) benzene and bis(dimethylamino)dimethylsilane had a glass-transition temperature of 62 C, excellent thermal stability, but less resistance to hydrocarbons than the fluoropolymer. It was cured to a tough elastomer at room temperature. The coating obtained when this elastomer was sprayed onto air-foil test specimens was found to have much greater resistance to simulated rain erosion at ordinary temperatures than a silicone coating and slightly less than neoprene. It suffered no degradation on being heated 4 hours at 150 C, as indicated by sand-erosion tests. (Author-PL)

Descriptors :   (*PLASTIC COATINGS, *EROSION), (*ELASTOMERS, SYNTHESIS(CHEMISTRY)), AIRCRAFT FINISHES, FLUORINE COMPOUNDS, HALOCARBON PLASTICS, SILICONES, DEGRADATION, THERMAL STABILITY

Subject Categories : Organic Chemistry
      Coatings, Colorants and Finishes

Distribution Statement : APPROVED FOR PUBLIC RELEASE