Polyvinyl acetal with high flowability and plasticizer-containing films produced therewith
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United States of America Patent
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Issued Date -
Jun 30, 2011
app pub date -
Dec 17, 2010
filing date -
Dec 18, 2009
priority date (Note) -
Abandoned
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Abstract
The invention relates to polyvinyl acetals obtainable by reacting polyvinyl alcohol with at least one aldehyde with a degree of acetalisation of at least 75 mol %, characterised by an OH blockiness of the polyvinyl acetal, defined as a quotient from the number of methylene groups of two adjacent alcohol sequences (VV) and the sum of the number of methylene groups of adjacent alcohol/acetal sequences and acetal/acetal sequences (VB+BB), of more than 0.151, as well as a process for the preparation thereof.
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