Task: Translation
Input (Czech): Vinylalkoholov  kopolymery jsou vyrobiteln  za p° tomnosti kyseliny jako katalyz toru acetyla n  reakc  polyvinylalkohol  se stupn m zm²deln n  v rozsahu 80 a  99,5 % mol., s v²hodou mezi 88 a 99,5 % mol., s p° rodn mi l tkami nebo jejich deriv ty, obsahuj c mi karbonylov  skupiny, pop° pad  p°edpokl dan  karbonylov  skupiny. Jsou pops ny ve vod  rozpustn  filmy, kter  obsahuj  tyto vinylalkoholov  kopolymery a jejich  rozpustnost ve vod  je nastaviteln  podle po adovan  teploty rozpouÜt n . Tyto ve vod  rozpustn  filmy se pou  vaj  jako balic  materi ly a tak  jako pomocn  balic  prost°edky, nap° klad jako pe etn  laky. Je pops n zp sob v²roby vinylalkoholov²ch kopolymer  a z nich vyr b n²ch ve vod  rozpustn²ch lak .\
Output (English): In the present invention, there are disclosed vinyl alcohol copolymers that can be prepared by the acid-catalyzed acetalization reaction of polyvinyl alcohols with a degree of saponification within the range of 80 to 99.5 mole percent and preferably between 88 and 99.5 mole percent with natural substances or their derivatives containing carbonyl or presumptive carbonyl groups. The description also relates to water-soluble films containing such vinyl alcohol copolymers, the solubility of which can be adjusted to the desired dissolution temperature. Said water-soluble films are used as packaging materials and auxiliaries, for example in the form of sealing lacquers. Further described is a process for preparing the invented vinyl alcohol copolymers as well as water-soluble lacquers produced therefrom.