Name: Chlorinated Polypropylene Adhesion Promoter CPP-15
Brand: Coatingsink
SKU: cpp-adhesion-promoter-cpp15
Availability: InStock

Question 1

What is the mechanism by which CPP-15 adheres to polypropylene and TPO?

Accepted Answer

CPP-15 adheres to PP and TPO through physical compatibility — the polypropylene backbone co-crystallizes and interdiffuses with the substrate polymer chains during film formation. The chlorine substituents increase polarity and cohesive energy density, improving anchorage to subsequently applied topcoats or inks that contain polar binders.

Question 2

How is CPP-15 applied as an adhesion primer before automotive coating?

Accepted Answer

CPP-15 is typically diluted to 5–10% solids in aromatic solvent blends (toluene, xylene) or ketones and spray-applied in a thin flash coat (5–10 µm dry film). Flash-off time is 2–5 minutes at ambient temperature before applying the basecoat. Baking at 60–80°C for 5 minutes strengthens the CPP adhesion layer further.

Question 3

Can CPP-15 be incorporated directly into a solventborne coating rather than used as a separate primer?

Accepted Answer

Yes. CPP-15 can be added at 5–15% on total resin solids directly into solventborne basecoats and single-stage topcoats formulated for PP substrates. Ensure the formulation solvent is compatible (aromatic or ketone-containing) to keep CPP-15 in solution; avoid purely aliphatic solvent systems as CPP-15 may precipitate.

Appearance	Clear to pale yellow solution
Solid Content	20% in toluene solution
Softening Point	80–100°C
Chlorine Content	14–16 wt%
Viscosity (toluene, 25°C)	200–400 mPa·s

Chlorinated Polypropylene Adhesion Promoter CPP-15

Specifications

FAQ

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