| 摘要 |
PROBLEM TO BE SOLVED: To provide a polymer dispersion usable for a low VOC (volatile organic compound) coating composition. SOLUTION: The aqueous polymer dispersion comprises polymer particles (A), polymer particles (B) and at least one low molecular weight polymer (C), where polymer particles (A) comprise high molecular weight polymer pA having Mw>50,000 and acid value of from 0 to 160, polymer particles (B) comprise high molecular weight polymer pB having Mw>50,000 and acid value of from 0 to 160, and (C) is an addition polymer having a calculated Tg, (low) of less than 10°C, Mn<10,000, acid value of from 0 to 80, formed by the polymerization of at least one ethylenically unsaturated nonionic monomer. COPYRIGHT: (C)2007,JPO&INPIT
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