polyurethane coating catalyst impact on yellowing resistance in clear pu topcoats abstract: clear polyurethane (pu) topcoats are widely employed in various applications, including automotive coatings, wood finishes, and protective films, due to their excellent mechanical properties, chemical resistance, and aesthetic appeal. however, a common limitation of pu coatings is their tendency to yellow upon exposure...

polyurethane coating catalyst impact on yellowing resistance in clear pu topcoats abstract clear polyurethane (pu) topcoats are widely utilized to enhance the aesthetic appeal and protective properties of various substrates. however, a significant challenge associated with these coatings is their susceptibility to yellowing upon exposure to ultraviolet (uv) radiation, heat, and other environmental factors. the...

polyurethane coating catalyst impact on yellowing resistance in clear pu topcoats abstract clear polyurethane (pu) topcoats are widely utilized to enhance the aesthetic appeal and protective properties of various substrates. however, a significant challenge associated with these coatings is their susceptibility to yellowing upon exposure to ultraviolet (uv) radiation, heat, and other environmental factors. the...