AQUEOUS POLYMER DISPERSION

• Main Authors: KOZISKI KATHLEEN A, FASANO DAVID M, LAU WILLIE, SHEPPARD AURELIA C, GEBHARD MATTHEW S
• Format: Patent
• Language: English
• Published: 18.11.2010
• Subjects: ADHESIVES; 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; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS THEREFOR; WOODSTAINS

PROBLEM TO BE SOLVED: To provide a polymer dispersion used in a low VOC coating formulation. SOLUTION: The aqueous polymer dispersion comprises polymer particles (A), polymer particles (B) and at least one low molecular-weight polymer (C), wherein polymer particles (A) comprise a high molecular-weight polymer pA having Mw>50,000 and an acid number of 0-160, polymer particles (B) comprise a high molecular-weight polymer pB having Mw>50,000 and an acid number of 0-160, and C is an addition polymer having a calculated Tg,(low) of less than 10°C, Mn<10,000, and an acid number of 0-80, formed by polymerization of at least one ethylenically unsaturated nonionic monomer. COPYRIGHT: (C)2011,JPO&INPIT