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:
Jan. 22, 1991
Filed:
Dec. 20, 1988
Erwin Dietz, Kelkheim, DE;
Gustav Kapaun, Bad Soden am Taunus, DE;
Michael Kappert, Kelkheim, DE;
Frank Prokschy, Frankfurt am Main, DE;
Adolf Kroh, Selters, DE;
Manfred Urban, Wiesbaden, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
Pigments of the formula I ##STR1## where A is a five- or six-membered aromatic fused or unfused heterocycle which contains one to three hetero atoms from the series consisting of nitrogen and/or oxygen and/or sulfur and which is bonded to the methylene group via a carbon atom, R.sub.1 and R.sub.2 are each hydrogen, alkyl C.sub.1 -C.sub.4, alkylene C.sub.2 or aryl, and together R.sub.1 and R.sub.2 may also be an aliphatic or aromatic ring, R.sub.3 is hydrogen, alkyl C.sub.1 -C.sub.4 hydroxylkyl C.sub.1 -C.sub.3 or alkylene C.sub.2, P is the radical of a polycyclic pigment or a radical of a mix-crystal of polycyclic pigments, and n is a number from 0.0001 to 0.2, are useful for pigmenting high molecular weight materials in the form of plastic materials, melts, spinning solutions, surface coatings, paints, printing inks, baking finishes of the class of the alkyd melamine resin or acrylic melamine resin finishes, two-component coatings based on polyisocyanate-crosslinkable acrylic resins and printing inks based on nitrocellulose.