Stephen Y Chen

Title: The Innovative Contributions of Stephen Y Chen

Introduction

Stephen Y Chen is a notable inventor based in Wheaton, IL (US), recognized for his significant contributions to the field of polymer science. With a total of 3 patents to his name, Chen has made strides in developing advanced materials for packaging applications.

Latest Patents

One of Chen's latest patents focuses on oxygen scavenging condensation copolymers for bottles and packaging. This invention discloses compositions that comprise condensation copolymers predominantly made of polyester segments and an oxygen scavenging amount of polyolefin oligomer segments. The polyester segments are derived from common bottling and packaging polyesters such as PET and PEN. The copolymers are formed through transesterification during reactive extrusion, typically containing about 0.5 to 12 wt % of polyolefin oligomer segments. These copolycondensates can absorb at least 0.4 cc of oxygen per gram in the solid state at ambient temperatures, making them suitable for use in films, liners, cups, wraps, and bottles. Notably, bottles made with these compositions maintain a clear and rigid appearance similar to unmodified polyester bottles, with over 99.4 wt % polyester, allowing for recycling with other polyester bottles.

Another significant patent involves a concentrate for use in the melt fabrication of polyester. This invention describes concentrates produced by melt processing a branching agent and a polyester carrier. These concentrates are designed to contain high concentrations of a branching agent to minimize the formation of crosslinked compounds during processing. The patent also outlines the processes for utilizing these concentrates effectively.

Career Highlights

Throughout his career, Stephen Y Chen has worked with prominent companies such as Amoco Corporation and BP Amoco Corporation. His experience in these organizations has contributed to his expertise in polymer technology and innovation.

Collaborations

Chen has collaborated with notable professionals in his field, including George E Rotter and Weilong L Chiang. These collaborations have likely enriched his research and development efforts, leading to impactful innovations.

Conclusion

Stephen Y Chen's work in the field of polymer science, particularly in developing oxygen scavenging materials and polyester fabrication processes, showcases his innovative spirit and dedication to advancing packaging technology. His contributions continue to influence the industry and promote sustainable practices in material usage.