The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 31, 2020
Filed:
Apr. 05, 2017
Kuraray Europe Gmbh, Hattersheim, DE;
Martin Steuer, Liederbach, DE;
Daniel Wenzlik, Wiesbaden, DE;
Takeshi Kusudo, Troisdorf, DE;
Philipp Lellig, Troisdorf, DE;
Uwe Keller, Avon, FR;
KURARAY EUROPE GMBH, Hattersheim, DE;
Abstract
A multilayer laminating film contains at least one first and one second layer of plasticized polyvinyl acetal, wherein the first layer comprises a first plasticizer and a first polyvinyl acetal with a degree of acetalization of 75.1-84.0 mol % and a molar ratio of continuous sequences of vinyl alcohol groups with 5 members with a stereochemical sequence of rrrr of more than 0.23 based on the total amount of continuous syndiotactic sequences of vinyl alcohol groups with 3 members in the polyvinyl acetal, and the second layer comprises a second plasticizer and a second polyvinyl acetal with a degree of acetalization of 60-84 mol %.