STUDIES ON POLYURETHANE POLYACRYLATE COMPOSITE POLYMER LATICES/

Several methods of preparing polyurethane/polyacrylate composite latic es are briefly discussed in this article. Copolymerization of a new mo nomer with acrylate monomers contributed very much to increasing the t ensile strength of the polymer films. Then, reactive low molecular wei ght polyurethane aqueous dispersions were prepared and mixed with acry late polymer latices having composite polymer films of fairly good pro perties were formed. As the third method, blending polyurethane latice s with acrylate polymer latices produced films with improved compatabi lity by crosslinking with formaldehyde. Finally, seed emulsion polymer ization proved to be successful in grafting acrylate polymer chains on to polyurethane and producing polymer films with balanced properties a nd particularly low brittle temperature.