Acrylic polyvinyl acetal films and composition
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United States of America Patent
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Apr 18, 2023
Grant Date -
Mar 11, 2021
app pub date -
Nov 19, 2020
filing date -
Dec 8, 2014
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Abstract
A film is described comprising a (meth)acrylic polymer and a polyvinyl acetal (e.g. butyral) resin. In some embodiments, the film has a glass transition temperature (i.e. Tg) ranging from 30° C. to 60° C. In some embodiments, the film has a gel content of at least 20% or greater. In some embodiments, the film has an elongation at break of at least 175%. The film typically comprises photoinitiator as a result of the method by which the film was made. The film may be a monolithic film or a layer of a multilayer film.
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