Mechanical Properties of Films from Hybrid Acrylic‐Polyurethane Polymer Colloids

A variety of polyurethane based on the polyaddition of isophoronediisocyanate and polypropyleneglycol has been used to prepare acrylic‐polyurethane hybrid polymer colloids, through either mini‐emulsion polymerization of their solutions in a mixture of monomers or seeded emulsion polymerization of this mixture from seeds of modified polyurethane containing dimethylolpropionic acid neutralized with triethylamine. The mixture of monomer is composed of 30% styrene, 30% methylmethacrylate, and 40% butylacrylate. The mechanical properies of films prepared through coalescence of these latexes where studied. The effect of various parameters such as the composition and the amount of polyurethane as well as the synthesis process are discussed.