| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an aqueous composition in which a coating layer including polyvinyl alcohol (PVA)-based resin can be formed, that excels in coating nature and viscosity stability, and in which the obtained coating layer is excellent in water resistance. <P>SOLUTION: The temperature-sensitivity phase change type aqueous composition includes: a PVA-based resin (A); a compound having two or more hindered amino groups (B); and water, wherein the resin (A) contains 5-40 mol% of a structural unit having an acid group, a bridged structure is formed between the resin (A) and the compound (B) by the interaction working between the acid group of the resin (A) and the hindered amino group of the compound (B), wherein the gel phase in which a water-containing gel in which water is incorporated in the network by the bridged structure is formed; and the sol phase in which the formation of the bridged structure is inhibited, and an aqueous liquid body in which the resin (A) and the compound (B) are dissolved or dispersed in water is formed are expressed, and the phase change of both phases is heat reversible. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
