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US 10,875,941 B2Granted
Polyvinyl acetal with reduced flowability
AssigneeKuraray Europe GmbH
InventorsMartin Steuer, Daniel Wenzlik, Takeshi Kusudo, Uwe Keller
Life of this patent
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Abstract
Polyvinyl acetals with a degree of acetalization of 70-84 mol %, and characterized by a molar ratio of the amount of continuous syndiotactic sequences of vinyl alcohol groups with 3 members of at least 0.152, based on the total amount of vinyl alcohol groups in the polyvinyl acetal, have exceptionally low melt flow.
Claims17
Polyvinyl acetal with a degree of acetalization of 70-84 mol %, having a molar ratio of the amount of continuous syndiotactic sequences of vinyl alcohol groups with 3 members of at least 0.152, based on the total amount of vinyl alcohol groups in the polyvinyl acetal.
Dependencies are inferred from the claim text.