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:
Jan. 05, 2021
Filed:
Jun. 24, 2016
3m Innovative Properties Company, St. Paul, MN (US);
Bimal V. Thakkar, Saint Paul, MN (US);
Jay M. Jennen, Forest Lake, MN (US);
Robert D. Hamann, Eagan, MN (US);
Ryan M. Braun, Saint Paul, MN (US);
Robert F. Watkins, White Bear Lake, MN (US);
Joseph D. Rule, Woodbury, MN (US);
Todd D. Jones, Saint Paul, MN (US);
Charlie C. Ho, Woodbury, MN (US);
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Abstract
The disclosed aliphatic thermoplastic polyurethane composition is well suited for use in thin, flexible light directing articles to impart flexibility, toughness, or protection to the light directing articles that contain optically active elements. The disclosed aliphatic thermoplastic polyurethanes have improved thermostability at higher temperatures. Specifically, the disclosed aliphatic thermoplastic polyurethanes have a cross-over temperature greater than 110° C. In one embodiment, the cross-over temperature is greater than 130° C. In one embodiment, the cross-over temperature is less than 170° C. and a Tg greater than 35 C and less than 70 C.