Patent · US Active

Multilayer film comprising layer of plasticized polyvinyl acetal with reduced flowability

US10603882B2 · kind B2 · utility

0Cited by

8References

13Claims

0Family size

Assignee

Kuraray Europe GmbH · DE

Inventors

Martin Steuer · Liederbach, DE
Daniel Wenzlik · Wiesbaden, DE
Takeshi Kusudo · Troisdorf, DE
Philipp Lellig · Troisdorf, DE
Uwe Keller · Avon, FR

Key dates

Filing date	Apr 5, 2017
Grant date	Mar 31, 2020
Priority date	—
Expiry date	Apr 5, 2037

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB32B2605/00
WIPO fieldSurface technology, coating
WIPO sectorChemistry

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 %.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.