GRADIENT POLYMER COMPOSITIONS FOR ELASTOMERIC WALL AND ROOF COATINGS

The present invention provides aqueous compositions for use as elastomeric roof coatings having excellent tint retention which comprise (i) one or more gradient emulsion copolymers having a weight average particle size of from 20 to 550 nm, (ii) a large particle size filler, preferably silica, (iii)...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Rokowski Joseph M, Evans Ann E
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOSITIONS BASED THEREON CORRECTING FLUIDS DYES FILLING PASTES GENERAL PROCESSES OF COMPOUNDING INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF MATERIALS THEREFOR WOODSTAINS WORKING-UP
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Beschreibung
Zusammenfassung:	The present invention provides aqueous compositions for use as elastomeric roof coatings having excellent tint retention which comprise (i) one or more gradient emulsion copolymers having a weight average particle size of from 20 to 550 nm, (ii) a large particle size filler, preferably silica, (iii) one or more chromatic colorants other than a white colorant in the amount of from 0.2 to 15 wt. %, based on the total weight of solids in the composition, and (iv) other pigments, extenders or fillers, wherein the resulting composition has a particle volume concentration (% PVC) of from 20 to 65%. The present invention provides methods of making the one or more gradient emulsion copolymers.