Karlfried Keller

Title: The Innovations of Karlfried Keller

Introduction

Karlfried Keller, an esteemed inventor based in Frankfurt am Main, Germany, has made significant contributions to the field of leather tanning processes. With a total of four patents to his name, Keller's work showcases innovative techniques that have advanced the industry.

Latest Patents

Keller's most recent patents focus on the improvement of leather tanning processes. One notable invention involves a method for tanning leather by treating animal skins with a water-soluble melamine-formaldehyde resin in the presence of an acid catalyst. This innovative approach is enhanced by using a resin that is at least partially etherified with glycol ether or alkyl glycol ether. Another patent details the use of a mixed resin, combining melamine-formaldehyde resin and anionically modified melamine-formaldehyde resin, to achieve optimal results. The anionic modification is achieved by preparing the resin in the presence of alkali metal sulfite or sulfamate, which allows for the creation of a mixed resin through partial modification.

Career Highlights

Throughout his career, Karlfried Keller worked with prominent companies such as Cassella Aktiengesellschaft and Hoechst Aktiengesellschaft. These experiences provided him with the expertise and knowledge necessary to develop innovative solutions in leather processing.

Collaborations

Keller collaborated with notable coworkers like Hans Honel and Walter Michel, whose contributions complemented his inventive efforts. Together, they explored new methods and advancements in leather tanning, solidifying their status in the industry.

Conclusion

Karlfried Keller's dedication to innovation in leather tanning has resulted in multiple patents that illustrate his creative problem-solving abilities. His collaborations and work with reputable companies have paved the way for advancements in the field, and his legacy continues to impact the industry today.