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. 19, 1990
Filed:
Aug. 22, 1989
Applicant:
Inventors:
Rudolf Kuhne, Frankfurt am Main, DE;
Heinrich Hamal, Liederbach, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B / ; C09B / ; D06P / ; D06P / ;
U.S. Cl.
CPC ...
534742 ; 106447 ; 106448 ; 106494 ; 106483 ; 106498 ; 534573 ; 534575 ; 534581 ; 534582 ; 534887 ;
Abstract
When a diamine of the formula ##STR1## in which n is 1 to 4, is bis-diazotized and the resulting bis-diazo compound is coupled with 2 moles of one or more coupling components of the formula ##STR2## in which R.sup.1 is hydrogen, chlorine, bromine, methyl or methoxy and R.sup.2 is hydrogen or, if R.sup.1 is hydrogen, also methyl or ethyl, disazo compounds are obtained which are colorants. Due to their high fastness to light and to migration and their heat stability and dispersibility, these compounds are useful for pigmenting high molecular weight materials, especially polyolefins.