Patent · US Active

Covers for LED light sources

US11353165B2 · kind B2 · utility

0Cited by

6References

12Claims

0Family size

Assignee

Covestro Intellectual Property GmbH & Co. KG · DE

Inventors

Ulrich Blaschke · Krefeld, DE
Alexander Meyer · Mülheim an der Ruhr, DE
Rafael Oser · Krefeld, DE
Michael Roppel · Burscheid, DE
Franky Bruynseels · Sint-Gillis-Waas, BE

Key dates

Filing date	May 21, 2019
Grant date	Jun 7, 2022
Priority date	—
Expiry date	Jun 6, 2039

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02B20/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

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.

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