EVALUATION OF INTERIOR AND EXTERIOR LATEX PAINTS
Exposure tests of 24 latex paints on both concrete and wood are in progress. On concrete the longest exposures have been for 8.9 weeks in the weatherometer and an additional 1 1/2 years outdoor exposure at 45 degrees from the vertical facing south. On wood the longest exposures have been for 1 1/2 years outdoor exposure at 45 degrees south. In general, all paints are still in quite good condition. On the basis of outdoor exposures of thin films of the latex paints it is possible to calculate a rate of loss of film thickness, but such results must be considered tentative at this time. In reference to the rate of disappearance of calcium carbonate and zinc oxide from thin films of latex paints, the results indicate that a 45 degree south outdoor exposure is more effective than exposure in a weatherometer. Some results with a scanning electron microscope are reported.
- Prepared in cooperation with Federal Highway Administration, Washington, D.C. See also PB-231 908.
Louisiana Department of HighwaysResearch and Development Section
Baton Rouge, LA USA
Washington, DC USA 20590
- Kewish, R W
- Rathe, S A
- Publication Date: 1975-4
- Pagination: 39 p.
- TRT Terms: Calcium carbonate; Color; Concrete; Crash exposure; Deterioration; Electron microscopes; Electron microscopy; Evaluation; Highways; Latex; Paint; Reflectivity; Thickness; Thin films; Weathering; Wood; X ray analysis; Zinc rich paint
- Uncontrolled Terms: Exposure; Reflectance
- Old TRIS Terms: Zinc oxides
- Subject Areas: Geotechnology; Highways; Materials; Safety and Human Factors;
- Accession Number: 00092997
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: LA-72-3CH(B)-2 Intrm Rpt.
- Files: NTIS, TRIS, USDOT, STATEDOT
- Created Date: Nov 18 1976 12:00AM