The application of paint to polypropylene and TPO (thermoplastic polyolefin) is difficult because of the poor adhesion of most coatings to plastics. Eastman™ chlorinated polyolefins (CPOs) are widely used as adhesion promoters for coatings and inks on polyolefin plastics such as untreated polyethylene, polypropylene, or TPO. Our chlorinated polyolefins serve as adhesion promoters in at least three ways:

• As a primer between the substrate and subsequent coatings
• As a primer or tie-coat between coatings layers
• As an additive to the paint or ink

Formulating with Eastman™ Waterborne CPO Adhesion Promoters

With Eastman™ CPO dispersions, it is possible to apply an adhesion-promoting primer from a waterborne system or to promote adhesion of a waterborne coating through use as an additive. Eastman™ CPO dispersions are useful as the base resin in adhesion-promoting primers and as an additive by being added directly to waterborne coating formulations to improve adhesion to polypropylene-based substrates.