FLUOROPOLYMERIC COMPOSITION FOR COATINGS Russian patent published in 1997 - IPC

FIELD: chemical industry. SUBSTANCE: composition for applying coatings that protects against corrosion and adhesion of products comprises, %: 0.1-3.99 pigments; 0.15-2.47 fillers; 0.2-4.96 surfactants; 0.5-25.0 zirconium salt, and the fluoroplastic suspension balance. Two-layer of 25-30 mcm thick coating is applied by spraying onto fluoroplastic composition. First layer comprises adhesion promoter and second layer comprises no adhesion promoter. The coating is previously dried at temperature of less than 100 C for 20 minutes. First layer is sintered at temperature from 200 to 250 C for 8-12 minutes. Second layer is sintered at temperature from 400 to 420 C for 15-20 minutes. Composition has higher adhesion strength of coating to etched metallic surface of 12.2-13.9 kgf/sq.mm. EFFECT: improved properties of fluoropolymeric composition. 1 tbl