Special-Primer PP 7580

Solubility
Special-Primer PP 7580 is only soluble in aromatics and chlorinated hydrocarbons.

Application and Properties
Special-Primer PP 7580 is mainly used to solve adhesion problems with critical substrates like polypropylene. With Special-Primer PP 7580 untreated plastics can be coated with e.g. 2 component polyurethane or epoxy systems. In most cases the adhesion promotion of Special-Primer PP 7580 is superior to Special-Primer PP 5130 or PP 7550.

Before usage Special-Primer PP 7580 must be stirred thoroughly. After that Special-Primer PP 7580 is ready for use; sometimes before application it is diluted to an even lower solids content with 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 7580 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. Further 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 7580 may need cleaning before any further coating can be applied.