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:
Nov. 17, 1998
Filed:
May. 21, 1997
Applicant:
Inventors:
Erwin Dietz, Konigstein, DE;
Axel Schonfeld, Wiesbaden, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; C09K / ; C09K / ; F21V / ;
U.S. Cl.
CPC ...
25229901 ; 25229962 ; 2522991 ; 25229961 ; 252582 ;
Abstract
The invention relates to cholesteric liquid-crystalline polymers containing at least one colored comonomer which absorbs light in the visible wavelength region. The colored comonomers can be bifunctional hydroxyl, amino and/or carboxyl derivatives of anthranthrone, anthraquinone, dioxazine, phthalocyanine, quinacridone, diketopyrrolopyrrole, perylene, perinone, azomethine or azo pigments or aminostilbenecarboxylic acids. Coatings containing such polymers are distinguished by coloristic effects which depend on the viewing angle and cannot be achieved by absorption pigments alone or by CLCP effect coatings.