... Physico-chemical nature of traits white crystalline powder. Melting point 261 ~ 262 Boiling point 276 Relative density 1.395g/cm3 Refractive index of ... modified phenolic resin (2118 type), rosin modified phenolic resin, p-tert-butyl phenolic resin, alkyd resin, unsaturated polyester resin (Polaroid plate special ...