Abstract: The invention relates to a method for modifying acetalated polyvinyl alcohols comprising reacting a melt acetalated polyvinyl alcohols with epoxides. The invention also relates to uses of the resultant modifying acetalated polyvinyl alcohols, including uses in ceramic applications.

Abstract: The invention relates to a method for modifying acetylized polyvinyl alcohols by reacting the same with epoxides in the polymer melt. Also disclosed is the use of said products in ceramic applications, for example.

Abstract: The invention relates to modified polymers which contain vinyl alcohol groups and are obtained by reacting some of the vinyl alcohol groups with at least one olefinically unsaturated carboxylic acid anhydride and then photochemically crosslinking the reaction product.

Abstract: The invention relates to a method for producing polyvinyl alcohol shaped bodies involving thermoplastic processing of at least one polymer (A), of at least one softener and, optionally, of water and/or other additives, whereby polymer (A) contains: a.) 15.0 to 99.9 wt. % structural units of formula (1); b.) 0.0 to 50.0 wt. % structural units of formula (2), and; c.) 0.0 to 50.0 wt. % structural units of formula (3), each with regard to the total weight of polymer (A), whereby radicals R1, R2, R3, R4, R5, and R6 are defined according to the description. The method is characterized in that polymer (A) and the softener are placed into the extruder without being mixed beforehand and that the quantity of water is less than 2 wt. % with regard to polymer (A). The invention also relates to the polyvinyl alcohol shaped bodies, which can be obtained by using the method, and to their use.