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:
Dec. 22, 2015
Filed:
Jul. 03, 2012
Xuming Chen, Pearland, TX (US);
Pak-wing S. Chum, Montgomery, TX (US);
Kevin E. Howard, Midland, MI (US);
Leonardo C. Lopez, Midland, MI (US);
William C. Sumner, Midland, MI (US);
Shaofu Wu, Sugar Land, TX (US);
Xuming Chen, Pearland, TX (US);
Pak-Wing S. Chum, Montgomery, TX (US);
Kevin E. Howard, Midland, MI (US);
Leonardo C. Lopez, Midland, MI (US);
William C. Sumner, Midland, MI (US);
Shaofu Wu, Sugar Land, TX (US);
Dow Global Technologies LLC, Midland, MI (US);
Abstract
The fluoropolymer compositions of the present invention generally incorporate ingredients comprising one or more fluoropolymers, an ultraviolet light protection component (hereinafter UV protection component), and optionally one or more additional ingredients if desired. The UV protection component includes a combination of at least one hindered tertiary amine (HTA) compound having a certain structure and a weight average molecular weight of at least 1000. This tertiary amine is used in combination with at least one organic, UV light absorbing compound (UVLA compound) having a weight average molecular weight greater than 500. When the HTA compound and the UVLA compound are selected according to principles of the present invention, the UV protection component provides fluoropolymer compositions with significantly improved weatherability characteristics for protecting underlying materials, features, structures, components, and/or the like. In particular, fluoropolymer compositions incorporating the UV protection component of the present invention have unexpectedly improved ability to resist blackening, coloration, or other de gradation that may be caused by UV exposure. As a consequence, devices protected by these compositions would be expected to have dramatically improved service life. The compositions have a wide range of uses but are particularly useful for forming protective layers in optoelectronic devices.