Joseph J Hammer

Title: Joseph J Hammer: Innovator in Poly(1,3-propylene terephthalate) Production

Introduction

Joseph J Hammer is a notable inventor based in Charlotte, NC (US). He has made significant contributions to the field of polymer chemistry, particularly in the production of poly(1,3-propylene terephthalate). His innovative approach has led to advancements in the efficiency and quality of this important material.

Latest Patents

Joseph J Hammer holds a patent for a process that produces poly(1,3-propylene terephthalate) from the reaction of either terephthalic acid or a lower dialkyl ester of terephthalic acid and 1,3-propanediol. This process involves the polymerization of the monomer produced using a novel catalyst system. The catalyst composition includes an effective catalytic amount of tin in the polycondensation reaction. This innovative catalyst system, combined with Hostaperm.RTM. pigments, allows for the production of poly(1,3-propylene terephthalate) with a yellowness of less than 4 and an intrinsic viscosity (IV) of at least 0.80 dl/g.

Career Highlights

Joseph J Hammer is associated with Hoechst Celanese Corporation, where he has applied his expertise in polymer production. His work has contributed to the development of high-quality materials that are essential in various applications. His patent reflects his commitment to advancing the field of polymer chemistry.

Collaborations

Throughout his career, Joseph has collaborated with notable colleagues, including Marvin L Doerr and J R Dees. These collaborations have fostered an environment of innovation and have led to significant advancements in their respective fields.

Conclusion

Joseph J Hammer is a distinguished inventor whose work in the production of poly(1,3-propylene terephthalate) has made a lasting impact on the industry. His innovative processes and collaborations highlight his dedication to advancing polymer chemistry.