... 4.vinyl chloride75%; vinyl isobutyl ether 25% SMP-15 resin is copolymer of vinyl chloride and vinyl isobutyl ether .The vinyl isobutyl ... . SMP15 could make the painting more flexible.Solubility: SMP-15 is well soluble in aromatic and chlorinated hydrocarbons, ester, ... resins, aldehyde resins, petroleum resin, natural resins, alkyd resins modified by oil and fatty acids, drying oil, tars, and bitumen, ...