| 摘要 |
PURPOSE:To provide a polymer compsn. having good adhesion, strength and protective colloidal properties inherent to PVA as well as good water resistance and pigment-dispersibility inherent to casein, consisting of casein and a modified PVA into which a specified quantity of a specified long-chain alkyl group is introduced. CONSTITUTION:A polymer compsn. consists of 1-99wt% water-soluble long- chain alkyl group-modified PVA contg. 0.05-10mol% of a 4-20C long-chain alkyl group and 99-1wt% casein. If faults in PVA and casein can be covered without detriment to advantages inherent to each of them, it can be expected to increase the range of their use. However, they are poorly compatible with each other so that no combined effect could be obtd. When said modified PVA is used, there can be obtd. a compsn. having good adhesion, strength and protective colloidal properties inherent to PVA without detriment to good water resistance, pigment- dispersibility, etc. inherent to casein.
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