Polychem 7478-B-79 Phenolic alkyd resin OPC Polymers Alkyd Resins 100 solvent, MPK and PMA POLYCHEM 7478-B-79 is a phenolic modified alkyd supplied at 79% solids in a HAP-FREE solvent blend. Excellent choice for specialty coatings, especially non-lifting primers. This product is HAP-free. Industrial primers Linseed: Tofa: Tung Air dry Air drying, HAP-free, phenolic modified linseed/tofa/tung alkyd resin. Used for specialty coatings especially non-lifting primers.