THE DEVELOPMENT OF HEAT-RESISTANT PAINTS FOR METALS
Bimonthly progress rept. no. 1, 11 Jun-12 Jul 1962
SOUTHWEST RESEARCH INST SAN ANTONIO TX
Pagination or Media Count:
Coatings produced from zinc oxide and polyphosphoric acid did not resemble those produced from zinc oxide ZnO, dimethyl hydrogen phosphite DMHP, and ethyl acid phosphate EAP. Coatings ZnO-DMHP-EAP cured above 55 relative humidity at 100 deg F were water resistant but not heat resistant, while those cured below 55 were heat resistant but not water resistant. At 136 deg F, the similar critical relative humidity value was earlier found to be 38. water-resistant coatings prepared from ZnO-DMHP-EAP were more insoluble in water than coatings prepared from the same materials that were not water resistant. When the ZnO-DMHP-EAP coating material was dissolved in DMHP and the solution was applied to Al, a crusty layer was obtained. When the crust was removed, a surface coating remained that was heat resistant, water resistant, coherent, hard, and firmly bound to the aluminum.
- Coatings, Colorants and Finishes