| prov:value
| - The polymers preferably comprise polymers derived from unsaturated alcohols or amines and, respectively, their acyl derivatives or acetals, for example polyvinyl alcohol, polyvinyl acetate, polyvinyl stearat, polyvinyl benzoate, polyvinyl maleate, polyvinyl butyral, polyallyl phthalate, polyallylmelamine; or copolymers of these with olefins.
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