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.

  • Supplemental Notes:
    • Prepared in cooperation with Federal Highway Administration, Washington, D.C. See also PB-231 908.
  • Corporate Authors:

    Louisiana Department of Highways

    Research and Development Section
    Baton Rouge, LA  United States 

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Kewish, R W
    • Rathe, S A
  • Publication Date: 1975-4

Media Info

  • Pagination: 39 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00092997
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: LA-72-3CH(B)-2 Intrm Rpt.
  • Created Date: Nov 18 1976 12:00AM