TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The coating agent further contains additive. The additive contains fluorescence agent or pigment. Preferred Components: The fluorine compound is polymer having repeating unit derived from fluorine-containing acrylate monomer, and polymer having repeating unit derived from amino-group containing monomer. The aqueous fluid medium is mixture of water and/or water-soluble organic solvent. Preferred Compound: The fluorine-containing acrylate monomer is monomer having unsaturated group of formula: -O-CO-CX=CH2 or CH2=C(-X)-C(=O)-O-Y'-R. The amino group containing monomer is of formula: R11-N(R12)-Z-Y11-C(=O)-C(R21)=CH2.X=H, 1-6C linear or branched alkyl, fluoro, chloro, bromo, iodo, CFX1X2, cyano, 1-21C linear or branched fluoroalkyl, optionally substituted benzyl or optionally substituted phenyl;X1,X2=H, fluoro, chloro, bromo or iodo;Y'=1-10C aliphatic group or 6-10C aromatic group (both optionally substituted by oxygen), direct bonding, cycloaliphatic group, aroma aliphatic group, -CH2CH2N(-R1)SO2- or -CH2CH(OY1)CH2-;R1=1-4C alkyl;Y1=H or acetyl;R=1-21C linear or branched fluoroalkyl, 2-21C fluoroalkenyl or fluoroether repeating unit of formula: -C3F6O-, -C2F4O- or -CF2O-, preferably 2-6C fluoroalkyl or 3-6C fluoroalkenyl;R11,R12,R21=H or 1-4C alkyl;Y11=oxygen or NH;andZ=1-10C branched or linear alkylene.R11 and R12 optionally combine with each other, to form ring containing nitrogen atom. Preferred Process: The coating agent is coated on electronic component and aqueous fluid medium is removed, to obtain processed electronic component. EXAMPLE - 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl-2-methylprop-2-enoate (in g) (73.30), dimethylamino ethyl methacrylate (26.7) and isopropanol (150) were mixed and stirred at 60 degrees C. Then, t-butylperoxy pivalate (2) was added to the reaction mixture and reacted at 60 degrees C for 6 hours, to obtain polymer fluid. Further, liquid mixture of acetic acid (10.2) and ion exchange water (300) was added to the polymer fluid and stirred at 60 degrees C, to obtain coating agent. The obtained coating agent had excellent moisture prevention property, chemical resistance, electrically insulation, weather resistance and durability.