| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an aqueous polymer dispersion for a moisture-proof layer. <P>SOLUTION: This aqueous polymer dispersion has, as its dispersed polymer, a radical-polymerized polymer comprising 20-65 mass% at least a vinyl aromatic monomer (monomer A), 30-75 mass% at least a monomer (monomer B) having two conjugated ethylenically unsaturated double bond, and 0.5-10 mass% at least one other monomer (monomer C) selected from the group consisting ofα,β-monoethylenically unsaturated mono- and di-carboxylic acids and their ester derivatives, and the quantity of its alkali metal ion GA is not less than 0.5 mass% of the mass of the dispersed polymer, and the pH of the aqueous dispersion medium is controlled to less than 6. <P>COPYRIGHT: (C)2003,JPO</p> |
