Special-Primer PP 7560

Solubility
Special-Primer PP 7560 is only soluble in aromatics and chlorinated hydrocarbons.

Application and Properties
Special-Primer PP 7560 is mainly used to solve adhesion problems with critical substrates like polypropylene. With Special-Primer PP 7560 coated plastics can be applicated with e.g. 2 component polyurethane or epoxy systems. In most cases the adhesion promotion of Special-Primer PP 7560 is superior to Special-Primer PP 5130.

Before use Special-Primer PP 7560 must be stirred thoroughly. For application SpecialPrimer PP 7560 must be diluted to 2.5% solids (sometimes even lower) with suitable solvents, e.g. aromatic hydrocarbons. The primer may be applied by spraying, dipping or printing. It is not necessary to clean the substrate before application; only if the extruded polypropylene is dusted after long storage time.

Special-Primer PP 7560 should be applied in a thin and uniform layer. The drying is completely physically. At room temperature recoatability after 2-3 minutes is given. By adding heat the drying time can be further reduced. Painting, printing or gluing can follow immediately or even months later. It should be observed that after any long storage time the substrate treated with Special-Primer PP 7560 may need cleaning before any further coating can be applied.