Patent ID: 6867374

Claim:
A ceramic insulation coated wire characterized by a ceramic insulating coating, which is made of a coating composition containing a zirconium compound and a silicon compound, applied on a conductor and thermally cured, the coating composition comprising: (a) 5 to 55 parts by weight on a solids content basis of at least an organo-polysiloxane selected from its group expressed by the general formula: ( R ½ Si ) n ( OR 2 ) 2 where R 1 is an organic radical containing 1 to 8 carbons and R 2 is an alkyl radical containing 1 to 5 carbons and/or an acyl radical containing 1 to 4 carbons; (b) 0.5 to 15 parts by weight on a solids content basis of a mixture of at least a zirconium compound selected from zirconium tetra-alkoxide expressed by the general formula, Zr(OR) 4 where R is a hydrocarbon residue containing 1 to 5 carbons, a hydrolysate of zirconium tetra-alkoxide, and a partial condensate of the hydrolysate and/or at least a silane compound selected from tetra-alkoxy silane expressed by the general formula, Si(OR) 4 where R is a hydrocarbon radical containing 1 to 5 carbons, a hydrolysate of tetra-alkoxy silane, and a partial condensate of the hydrolysate, with the zirconium compound; and (c) 30 to 94.5 parts by weight of an organic solvent, wherein (a)+(b)+(c)=100 parts by weight.