Location History:
- Kelkheim, Taunus, DE (1976)
- Kelkheim, DE (1977 - 1983)
Company Filing History:
Years Active: 1976-1983
Title: Reinhard Zunker: Innovator in Pigment Chemistry
Introduction
Reinhard Zunker is a notable inventor based in Kelkheim (Taunus), Germany. He has made significant contributions to the field of pigment chemistry, holding a total of four patents. His work focuses on the development of innovative compounds that enhance the quality and performance of pigments.
Latest Patents
Zunker's latest patents include the synthesis of 1,3,4-Oxadiazoles, specifically 2,5-Bis-(4'-aminophenyl)-1,3,4-oxadiazoles. These compounds are chlorinated in the phenyl nuclei and are produced by condensing hydrazine or a hydrazine yielding agent with chlorinated benzoic acids or their derivatives. The resulting bis-hydrazide undergoes ring closure to yield the oxadiazole. These products serve as bis-diazo components, particularly for pigments that exhibit high tinctorial strength, clear and pure shades, and excellent fastness to light, heat, and solvents. Another notable patent involves the preparation of N,N'-dimethyl-perylene-3,4,9,10-tetracarboxylic acid diimide, which is a valuable pigment characterized by a pure red shade. This is achieved by reacting perylene-3,4,9,10-tetracarboxylic acid anhydride with a dilute aqueous solution of methylamine, leading to a product that can be used directly or treated further for enhanced transparency and hiding power.
Career Highlights
Reinhard Zunker has had a distinguished career at Hoechst Aktiengesellschaft, where he has been instrumental in advancing pigment technology. His innovative approaches have led to the development of high-performance pigments that are widely used in various applications.
Collaborations
Throughout his career, Zunker has collaborated with esteemed colleagues such as Otto Fuchs and Klaus Hunger. These partnerships have fostered a collaborative environment that has contributed to the success of his research and development efforts.
Conclusion
Reinhard Zunker is a prominent figure in the field of pigment chemistry, with a strong portfolio of patents that reflect his innovative spirit and dedication to advancing the industry. His contributions continue to influence the development of high-quality pigments that meet the demands of modern applications.
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