Wilhelm Holznagel

Title: Wilhelm Holznagel: Innovator in Inorganic Pigments

Introduction

Wilhelm Holznagel is a notable inventor based in Krefeld, Germany. He has made significant contributions to the field of inorganic pigments, holding a total of 2 patents. His work focuses on developing temperature-stable pigments that have various applications in industries requiring durable coloring agents.

Latest Patents

Holznagel's latest patents include a temperature-stable inorganic yellow pigment and an improved iron oxide pigment. The first patent describes a yellow pigment with the composition Fe.sub.2 TiO.sub.5 .multidot. x TiO.sub.2, where x ranges from 0 to about 15. This pigment is produced by forming an aqueous suspension of finely divided iron and titanium compounds, followed by calcination at temperatures between 600°C and 1100°C. The second patent details an Fe.sub.3 O.sub.4 iron oxide black pigment that incorporates up to 50 mole percent of .gamma.-Fe.sub.2 O.sub.3. This pigment is designed to have improved resistance to oxidation, making it particularly useful for pigmenting both inorganic and organic dispersions.

Career Highlights

Holznagel has had a distinguished career at Bayer Aktiengesellschaft, where he has been instrumental in advancing the company's pigment technology. His innovative approaches have led to the development of pigments that meet the demanding requirements of various applications.

Collaborations

Throughout his career, Holznagel has collaborated with esteemed colleagues such as Franz Hund and Friedrich Kindervater. These partnerships have fostered a creative environment that has contributed to the success of his inventions.

Conclusion

Wilhelm Holznagel's contributions to the field of inorganic pigments highlight his innovative spirit and dedication to advancing technology. His patents reflect a commitment to improving the quality and performance of pigments used in various industries.