C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 8/28 (2006.01) C04B 35/634 (2006.01) C08F 8/12 (2006.01) C09D 5/08 (2006.01) C09D 11/02 (2006.01) C09D 11/10 (2006.01)
Patent
CA 2259380
Modified polyvinyl acetals are prepared by saponification of 1-alkylvinyl acetate-vinyl acetate copolymers, which contain 1-alkylvinyl acetate/vinyl acetate in a weight ration of 1/99 - 40/60 and subsequent acetalization the saponification products containing at least 80% units of vinyl alcohol and 1-alkyl vinyl alcohol with one or more aliphatic aldehydes with 1-6 C atoms under acid catalysis in an aqueous and/or organic medium; as well as to a method for the manufacture and the use thereof, especially in printing inks.
L'invention concerne des polyvinylacétals modifiés obtenus par saponification de copolymères de 1-alkylvinylacétate-vinylacétate contenant du 1-alkylvinylacétate/vinylacétate dans un rapport en poids de 1/99 à 40/60, et acétalisation consécutive des produits de saponification possédant au moins 80 % en poids d'unités alcool vinylique et alcool vinylique 1-alkyle avec au moins un aldéhyde aliphatique ayant 1 à 6 atomes de carbone dans des conditions de catalyse acide dans un milieu aqueux et/ou organique. L'invention concerne également un procédé de production correspondant et l'utilisation de ces polyvinylacétals modifiés, en particulier, dans les encres d'imprimerie.
Braunsperger Guenter
Friedl Georg
Haefner Klaus
Heiling Peter
Huber Otto-Sebastian
Gowling Lafleur Henderson Llp
Wacker-Chemie Gmbh
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