Partially cross-linked polyvinyl alcohol
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United States of America Patent
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Nov 1, 2005
Grant Date -
Dec 2, 2004
app pub date -
Jul 26, 2004
filing date -
Aug 18, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a partially cross-linked polyvinyl alcohol, obtained by reacting a polyvinyl alcohol with a polycarboxylic acid, in particular a hydroxypolycarboxylic acid. The partially cross-linked polyvinyl alcohol can be used to produce foils, which have a good water-solubility or water-swelling capacity. Due to this property, such foils can be used as packing material for detergents, cosmetics and the like. According to the invention, the packing dissolves in water, releases its contents or is suitable for releasing (permeation) chemical compounds or agents.
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