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. 16, 2015
Filed:
Jun. 09, 2011
Applicants:
Jean-pierre Bacher, Buschwiller, FR;
Gerardus DE Keyzer, Riehen, CH;
Urs Lehmann, Basel, CH;
Inventors:
Assignee:
BASF SE, Ludwigshafen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C09K 19/60 (2006.01); G02B 5/30 (2006.01); C09B 31/043 (2006.01); C09B 31/053 (2006.01); C09B 31/14 (2006.01); C09B 31/18 (2006.01); C09B 31/28 (2006.01); C09B 67/22 (2006.01); G02B 5/22 (2006.01);
U.S. Cl.
CPC ...
C09K 19/601 (2013.01); C09B 31/043 (2013.01); C09B 31/18 (2013.01); C09B 31/28 (2013.01); C09B 67/0055 (2013.01); G02B 5/223 (2013.01); G02B 5/3033 (2013.01);
Abstract
Described is a black dichroic dye composition comprising 2 or more dyes, wherein at least one dye, generally a red dye and optionally a yellow dye, conforms to the formula A and at least one dye, usually a blue dye, conforms to the formula B Ar—N═N—[Ar—N═N—]Ar—N═N—Ar(B) with symbols as defined in present claims. The dye composition is well suited for combination with liquid crystal material for use, inter alia, as polarizing film and/or in liquid crystal displays, showing, inter alia, high dichroic ratio and excellent compatibility with the LC material.