Accession Number:
AD0272780
Title:
THE DEVELOPMENT OF HEAT-RESISTANT PAINTS FOR METALS
Descriptive Note:
Corporate Author:
SOUTHERN RESEARCH INST BIRMINGHAM ALA
Personal Author(s):
Report Date:
1961-12-18
Pagination or Media Count:
1.0
Abstract:
The ZnO-dimethyl hydrogen phosphite DMHP-ethyl acid phosphate EAP coating systems were studied. ZnO made by the French process, which has modular-shaped particles, produced smoother ZnO-DMHP-EAP coatings than ZnO made by the American process, which has acicular-shaped particles. It was found that addition of water to coating mixtures of this type accelerated reaction and resulted in harder, better-bonded coatings. Application of several thin coats of ZnO-DMHP-EAP compositions produced coatings with better properties than application of a single thick coat. Overcoating ZnO-DMHP-EAP coatings with colloidal silica increased the hardness, glossiness, and heat-resistance of the coatings. The use of silicates in the reaction mixtures was not promising. Other metal oxides showed no advantage over ZnO in a re-evaluation of coatings prepared with the organophosphorus compounds. Frit 1 also remains the best frit yet produced for preparing heat-resistant coatings from frits and organophosphorus compounds. The effective potlife of the ZnO-DMHP-EAP reaction mixture was about 15 min. Most of the curing of the coating apparently takes place during the first 90 min after application. Author
Descriptors:
- *HEAT RESISTANT MATERIALS
- *METAL COATINGS
- *METALS
- *PAINTS
- CERAMIC COATINGS
- DIOXIDES
- ETHYL RADICALS
- HARDNESS
- HYDROGEN COMPOUNDS
- MANUFACTURING
- METAL COMPOUNDS
- ORGANOMETALLIC COMPOUNDS
- METHYL RADICALS
- OXIDES
- PHOSPHATE COATINGS
- PHOSPHATES
- PHOSPHITES
- PREPARATION
- PROCESSING
- ELECTRICAL RESISTANCE
- SILICON COMPOUNDS
- TEMPERATURE
- WEATHERPROOFING
- ZINC COMPOUNDS