Aqueous polymer dispersion and method of use

• Main Author: BRADY JEAN M.,FRADKIN DEBORAH G.,GEBHARD MATTHEW S.,PUSCHAK CAREN A
• Format: Patent
• Language: English
• Published: 18.04.2007
• Subjects: ADHESIVES; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SPRAYING OR ATOMISING IN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF MATERIALS THEREFOR; WOODSTAINS

An aqueous polymer dispersion containing a predominant amount of first polymer particles and a smaller amount of second polymer particles is provided. The first polymer particles have a glass transition temperature in the range of from -20 DEG C to 25 DEG C. The second polymer particles include multiethylenically unsaturated monomer as polymerized units, and have a glass transition temperature of less than 0 DEG C. The aqueous polymer dispersion is useful for providing dry coatings having improved dirt pickup resistance and an acceptable level of scrub resistance. Also provided is an aqueous coating composition including the aqueous polymer dispersion and a method for preparing a dry coating from the aqueous coating composition.