Vinyl ester copolymeric emulsions and paints prepared therefrom

Abstract

Abstract A VINYL ESTER-BASED COPOLYMER EMULSION IS PROVIDED WHICH, BECAUSE OF INTERNAL MODIFICATION, IS SUITED FOR FORMULATION INTO HIGH-GLOSS AND SEMIGLOSS PAINTS. THE EMULSION EXHIBITS INTERCATION WITH ADDED PIGMENT, THIXOTROPY, BODY, PH AND VICOSITY STABILITY, AS WELL AS MECHANICAL AND FREEZE-THAW STABILITY. THE EMULSION IS READILY COALESCIBLE UNDER AMBIENT CONDITIONS INTO CLEAR, TOUGH FILMS WHICH CURE ON DRYING AND DEVELOP A HIGH LEVEL OF WATER RESISTANCE. THE ESSENTIAL COMPONENTS OF THE EMULSION ARE A COPOLYMER OF ABOUT 75 TO 99 PERCENT BY WEIGHT OF VINYL ESTER, 0 TO ABOUT 24 PERCENT BY WEIGHT OF SOFTENING MONOMER AND ABOUT 1 TO3.5 PERCENT BY WEIGHT OF THE AMMONIUM SALT OF AN UNSATURATED CARBOXYLIC ACID; O.5 TO 7 PERCENT BY WEIGHT SURFACTAND, PREFERABLY 0.5 TO 2.5 TO 7 PERCENT BY WEIGHT OF ANIOMIC SURFACTANT AND 1 TO 4 PERCENT BY WEIGHT OF NONIONIC SURFACTANT; 0.3 TO 3 PERCENT BY WEIGHT OF ALKYLENE ININE ADDED IN A POST-TREATMENT STEP TO IMINATE THE COPOLYMER: AND SUFFICIENT AMMONIA BANKED AS THE CARBONATE-BICARBONATE TO MAINTAIN THE PH BETWEEN 7 AND 8.4 THE PRESENCE OF ABOUT 0.01 TO 1 PERCENT BY WEIGHT OF ONE OF A VARIETY OF COLLOIDAL CARBOXYLATED COPOLYMER THICKENING AGENTS IN THE EMULSION, WHILE NOT ESSENTIAL, ENHANCES FURTHER THE DESIRED FORMULATING RHEOLOGY OF THE AMULSION. PROCESSES FOR PREPARING THE EMULSION AND THE DERIVED PAINTS ARE PROVIDED.

Inventors

• 👤 James Newton Coker

Bibliographic Details