Location History:
- Schildgen, DE (1976)
- Cologne-Stammheim, DE (1978)
- Bergisch Gladbach, DE (1981 - 1986)
Company Filing History:
Years Active: 1976-1986
Title: Willi Eifler: Innovator in Polyurethane Technology
Introduction
Willi Eifler is a notable inventor based in Cologne-Stammheim, Germany. He has made significant contributions to the field of polyurethane technology, holding a total of 4 patents. His work focuses on processes that enhance the production of polyisocyanates and polyurethane elastomers.
Latest Patents
Eifler's latest patents include a process for the production of polyisocyanates. This invention is directed towards creating polyamines of the diphenylmethane series with a high diamine content and a low 2,2'-diamino-diphenylmethane content. The process involves condensing aniline with formaldehyde in the presence of hydrochloric acid as a catalyst, followed by neutralizing the acid catalyst and distilling the resulting polyamine mixture.
Another significant patent is for the production of polyurethane urea elastomers. This invention describes a process for creating non-cellular polyurethane urea elastomers using a chain-extender mixture derived from asymmetrically alkyl-substituted anilines. These chain-extending agents exhibit medium reactivity to isocyanate compounds and can be processed in both high-pressure and low-pressure metering and mixing units. The resulting elastomers are characterized by their excellent mechanical properties.
Career Highlights
Willi Eifler is associated with Bayer Aktiengesellschaft, a leading company in the chemical and pharmaceutical industry. His work at Bayer has allowed him to innovate and develop new processes that contribute to the advancement of polyurethane technology.
Collaborations
Eifler has collaborated with notable coworkers such as Roderich Raue and Otto Ganster. Their combined expertise has likely played a role in the successful development of Eifler's patents.
Conclusion
Willi Eifler's contributions to the field of polyurethane technology through his innovative patents demonstrate his commitment to advancing chemical processes. His work continues to influence the industry and showcases the importance of innovation in material science.