... . 4.vinyl chloride75%; vinyl isobutyl ether 25% SMP-25 resin is copolymer of vinyl chloride and vinyl isobutyl ether .The ... ether offers the product good link function. SMP-25 resin has good binding property as a result of its special ... with vinyl chloride copolymer, polyacrylic ester, unsaturated polyester resins, aldehyde resins, petroleum resin, natural resins, alkyd resins modified by oil and fatty ...