Company Filing History:
Years Active: 1981-1984
Title: **Walter Knobel: Innovator in Dye Fastness Technology**
Introduction
Walter Knobel, an accomplished inventor based in Pratteln, Switzerland, has made significant contributions to the field of dye technology. With a total of three patents to his name, Knobel focuses on enhancing the fastness properties of dyes, particularly for cellulose substrates, through innovative chemical treatments.
Latest Patents
Knobel's latest patents demonstrate his expertise in improving the stability of direct and reactive dyes. His first patent details a composition and method for increasing the fastness of direct dyes on cellulose substrates. This advancement involves after-treatment with the reaction product of a quaternary polyalkylene polyamine combined with an N-methylol resin precursor. The application of heat curing in the presence of a catalyst enhances the durability of the dyes, ensuring better wet and light fastness.
Further expanding his innovation, his second patent focuses on a similar methodology that improves the wet fastness of direct dyes using the reaction product of an amine with compounds such as cyanamide, dicyanodiamide, guanidine, or biguanidine. This reaction is also followed by treatment with an N-methylol resin precursor and heat curing, which optimizes the fastness properties, potentially eliminating the need for washing unfixed reactive dyes.
Career Highlights
Knobel currently serves at Sandoz GmbH, where he leverages his knowledge and experience to advance dye technology. His work significantly impacts various industries where dye reliability and durability are critical.
Collaborations
Throughout his career, Walter Knobel has collaborated with talented coworkers such as Tibor Robinson and Bruno Kissling. These partnerships reflect a commitment to innovation and continuous improvement in dye fastness technology.
Conclusion
Walter Knobel's contributions to the field of dye technology are notable, particularly through his innovative patents aimed at enhancing dye fastness for cellulose substrates. His work at Sandoz GmbH, coupled with collaborations with esteemed colleagues, positions him as a key figure in the ongoing evolution of dye application methods.