Invention Grant
US4656216A Thermoplastically processable polyvinyl alcohol compositions, process
for their preparation, and films and moldings prepared from them
失效
可热塑加工的聚乙烯醇组合物，它们的制备方法以及由它们制备的薄膜和模制品
- Patent Title: Thermoplastically processable polyvinyl alcohol compositions, process for their preparation, and films and moldings prepared from them
- Patent Title (中): 可热塑加工的聚乙烯醇组合物，它们的制备方法以及由它们制备的薄膜和模制品
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Application No.: US714045Application Date: 1985-03-19
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Publication No.: US4656216APublication Date: 1987-04-07
- Inventor: Albrecht Muller , Wolfgang Zimmermann
- Applicant: Albrecht Muller , Wolfgang Zimmermann
- Assignee: Hoechst AG
- Current Assignee: Hoechst AG
- Priority: DEX3410241 19840321
- Main IPC: C08K5/053
- IPC: C08K5/053 ; C08L29/00 ; C08L29/04 ; C08L33/00 ; C08L33/02 ; C08L33/24 ; C08L39/06 ; C08K5/05 ; C08L39/00 ; C11D17/00
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.
Public/Granted literature
- US5880406A Cover layer for electrical conductors or semiconductors Public/Granted day:1999-03-09
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