The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 07, 1987
Filed:
Mar. 19, 1985
Albrecht Muller, D-6230 Frankfurt am Main 80, DE;
Wolfgang Zimmermann, D-6230 Frankfurt am Main 80, DE;
Other;
Abstract
In order to preserve the solubility of films and moldings of polyvinyl alcohol in cold water even under the action of an aggressive atmosphere, in particular a strongly acidic atmosphere, the thermoplastically processable polyvinyl alcohol composition used for the preparation of the films and moldings is stabilized by the addition of a water-soluble polymer or copolymer which is composed to the extent of at least 70% by weight of monomer units which are carboxylic acid amides at least monosubstituted on the amido nitrogen. N-vinylpyrrolidine, N-vinyl-N-methylacetamide and the alkali metal salts or the ammonium salts of 2-acrylamido-2-methylpropanesulfonic acid have proved to be particularly suitable representatives of this group of compounds.