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:
Jun. 07, 2022
Filed:
May. 21, 2019
Covestro Intellectual Property Gmbh & Co. KG, Leverkusen, DE;
Ulrich Blaschke, Krefeld, DE;
Alexander Meyer, Düsseldorf, DE;
Rafael Oser, Krefeld, DE;
Michael Roppel, Burscheid, DE;
Franky Bruynseels, Sint Gillis-Waas, BE;
COVESTRO INTELLECTUAL PROPERTY GMBH & CO. KG, Leverkusen, DE;
Abstract
The invention relates to the use of branched aliphatic hydrocarbons such as squalane in compositions based on thermoplastic polymer, in particular on polycarbonate, which are used for producing molded parts used in LED lighting units, such as covers for instance. According to the invention it has been found that the use of branched aliphatic hydrocarbons makes it possible to enhance the total transmission and the transmission in the range from 360 to 460 nm, thus making corresponding compositions particularly suitable for producing molded parts for use in combination with white LED light sources. It has additionally been shown that yellowing and haze are simultaneously reduced.