| 摘要 |
It is an object of the present invention to provide a polyvinyl acetal resin composition capable of giving a ceramic green sheet which has sufficient flexibility and is hardly damaged even when being formed into a thin film, when the polyvinyl acetal resin composition is used as a binder for a ceramic green sheet. It is another object of the present invention to provide a ceramic slurry, a ceramic paste, a ceramic green sheet, a conductive paste and an interlayer film for laminated glass for automobiles, each produced by using the polyvinyl acetal resin composition. The present invention pertains to a polyvinyl acetal resin composition containing a polyvinyl acetal resin A and a polyvinyl acetal resin B incompatible with the polyvinyl acetal resin A, which is formed by acetalizing a mixed polyvinyl alcohol containing two or more kinds of polyvinyl alcohols having different saponification degrees, and wherein the mixed polyvinyl alcohol contains main two kinds of polyvinyl alcohols in which X and Y satisfy the relationship of the following equation (1): Formula 1 X - Y ‰¥ 10
in which X represents the saponification degree of any one polyvinyl alcohol a of the polyvinyl alcohols contained in the mixed polyvinyl alcohol and Y represents the saponification degree of a polyvinyl alcohol b other than the polyvinyl alcohol a, and
wherein in denoting, by M, the polymerization degree of polyvinyl alcohol having a higher polymerization degree of the main two kinds of polyvinyl alcohols denoting the polymerization degree of the other polyvinyl alcohol by N, M and N have the relationship of the following equation (2) : Formula 2 M / N ‰¤ 3
and a phase composed of the polyvinyl acetal resin A and a phase composed of the polyvinyl acetal resin B form a sea-island structure. |
