| 摘要 |
PROBLEM TO BE SOLVED: To obtain an aqueous coating agent which can form a coating film excellent in resistances to water, oil, and chemicals and in adhesion to many materials by incorporating a polyolefin elastomer and an acid-modified polyolefin and/or a higher fatty acid salt into the same and homogeneously dispersing solid components in an aqueous phase to give an aqueous dispersion. SOLUTION: This aqueous coating agent is prepared by melt mixing and kneading a basic substance and water into a melt mixture comprising a polyolefin elastomer and an acid-modified polyolefin and/or a higher fatty acid salt in such an amount of water that the total water concentration is 3-25 wt.% to thereby neutralize and/or saponify at least part of the acid-modified polyolefin and/or the higher fatty acid salt and to thereby disperse solid components in an aqueous phase. Preferably, this coating agent is an aqueous dispersion containing the acid-modified polyolefin and/or the higher fatty acid salt in an amount of 0.5-30 pts.wt. based on 100 pts.wt. polyolefin elastomer.
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