Accession Number : AD0725754

Title :   Degradation Mechanisms of Pigmented Coatings.

Descriptive Note : Final rept. 1 Dec 69-1 Jan 71,

Corporate Author : OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS

Personal Author(s) : Campbell,William B. ; Cochran,Joe K.

Report Date : MAR 1971

Pagination or Media Count : 70

Abstract : Two different types of polydimethylsiloxane formuated with a rutile titanium dioxide pigment were evaluated as polymeric thermal control coatings. Oxygen permeability, diffusion, and solubility in these coatings were measured for various temperatures. It was noted that diffusion and permeability coefficients decreased as pigment concentration increased. Morphological investigations comparing surface roughness and surface area to the ultraviolet stability of a zinc orthotitanite coating indicated that pigment surface area is directly related to the increase in solar absorptance. (Author)

Descriptors :   (*PAINTS, DEGRADATION), (*SILICONES, *PLASTIC PAINTS), (*PLASTIC COATINGS, PERMEABILITY), ADSORPTION, RUTILE, PERMEABILITY, DIFFUSION, SURFACES, TITANATES, ZINC COMPOUNDS, OXYGEN, ULTRAVIOLET RADIATION

Subject Categories : Coatings, Colorants and Finishes

Distribution Statement : APPROVED FOR PUBLIC RELEASE