The B. F. Goodrich Company

James Stanley Dodge

George Kletecka

Ti Chou

A coating composition for use as an overcoat or heat resistant coating having improved heat resistance comprised of an aqueous latex polymer emulsion and a water soluble or water-dispersible resin which containing a sufficient number of either (a) carboxyl groups or (b) carboxyl and amide groups which will form at least one anhydride ring or imide, in the presence of sufficient heat, and release water molecules, with the latex polymer having a particle size of less than about 1600 Angstroms and containing an effective amount of a nitrogen containing volatile base to achieve a pH of greater than about 7.5 to keep the resin solubilized or dispersed.

Heat resistant coating composition

A stable blend of a vinyl halide latex and an acrylic latex is prepared by adjusting pH of the latexes to below about 6, adding a surfactant containing nitrogen having attached thereto alkyleneoxy groups to one or both of the latexes, and mixing the latexes, the surfactant is selected from cationic-nonionic surfactants, and amount thereof should be sufficient to maintain the latex blend stable for at least one month at 20.degree. C.

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Bay Village, OH, United States of America

James Stanley Dodge