Abstract:

In this paper，polypropylene (PP) bonding with CPPgGMA (glycidyl methacrylate grafted chlorinated polypropylene) was studied as well as bicomponent acrylic coating painted on PP and its composite after using CPPgGMA as a primer.The results show that the adhesive strength of CPPgGMA to PP is better to some extent than that of CPP to PP，and the adhesion strength of coatingsubstrate can be improved effectively.As the grafting degree of glycidyl methacrylate onto chlorinated increasing，the adhesion strength of coatingsubstrate increased more and more significantly.When using CPPgGMA with grafting degree of 2.31% as primer the coating adhesion can even reach class zero which is the best class.

Key words: CPPgGMA, polypropylene composite, painting, bonding