WATER-SOLUBLE COMPOSITION FOR ELECTRIC- INSULATION COATING OF ELECTRIC STEEL Russian patent published in 1999 - IPC

FIELD: magnetic circuits of electrical machines, equipment and instruments, in particular, for electric motors of sealed compressors of household refrigerators, rotation compressors of air conditioners, submersed and other types of electric motors. SUBSTANCE: sheets of isotropic electric steel are covered with water-soluble composition, which weight percentages of constituents are 46-47% of latex, 25.8- 29.9 of butadiene-styrene rubber, 31.3-35.8 of orthophosphoric acid, 1.4-1.7 of oxiethylated monoalkyl phenol based on propylene terpolymers, 2.8-3.3 of magnesium oxide, 1.5-2.1 of aluminum hydroxide, 0.25-0.3 of boric acid, 1.7-1.9 of ammonium polyphosphate; rest is water. EFFECT: improved production of composition, increased homogeneity of coating, improved physical and mechanical characteristics. 1 tbl