| 摘要 |
PROBLEM TO BE SOLVED: To provide a weather resistance-enhancing material for an aqueous coating that enhances weather resistance such as gloss retention, yellowing resistance, water resistance or the like by leaps and bounds when added to various kinds of aqueous coatings and enhances also stain resistance. SOLUTION: The weather resistance-enhancing material for an aqueous coating comprises a copolymer particle (A) having a weight-average molecular weight within the range of 5,000-300,000 obtained by emulsion polymerization of 6-50 mass% of an ethylenically unsaturated monomer (a) bearing a piperidyl group in the molecule and 50-94 mass% of an ethylenically unsaturated monomer (b) bearing a radically polymerizable unsaturated double bond in the molecule (provided that the sum of the components (a) and (b) is 100 mass%). COPYRIGHT: (C)2008,JPO&INPIT
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