Bruce D Lawrey

Title: Bruce D. Lawrey: Innovator in Thermoplastic Polyurethanes

Introduction

Bruce D. Lawrey is an accomplished inventor based in Carnegie, PA (US). He has made significant contributions to the field of thermoplastic polyurethanes (TPUs) with a focus on enhancing their properties through innovative techniques. With a total of 3 patents, Lawrey's work has garnered attention for its practical applications in various industries.

Latest Patents

One of Lawrey's notable patents is centered around softening thermoplastic polyurethanes using ionomer technology. This invention presents a novel approach to the addition of plasticizers for softening TPUs, which involves lowering the durometer and melt viscosity. The method incorporates bonded sulfonate groups with quaternary ammonium counterions into the TPU. By using an ionic diol, such as N,N-bis (2-hydroxyethyl)-2-aminoethane-sulfonic acid (BES), along with bulky alkyl ammonium cations during the TPU synthesis, the softening effect is achieved. The steric hindrance of the bulky quaternary ammonium groups is believed to weaken the dipole-dipole interactions of the sulfonate groups and lower the crystallinity of the hard block. This results in additional free volume that softens the polymer and reduces the melt viscosity.

Career Highlights

Throughout his career, Bruce D. Lawrey has worked with reputable organizations, including the University of Akron and Covestro LLC. His experience in these institutions has allowed him to refine his expertise in polymer science and contribute to advancements in TPU technology.

Collaborations

Lawrey has collaborated with notable colleagues, including Matthew L. Becker and Robert A. Weiss. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.

Conclusion

Bruce D. Lawrey's contributions to the field of thermoplastic polyurethanes demonstrate his commitment to innovation and excellence. His patents reflect a deep understanding of polymer chemistry and its applications, making him a significant figure in the industry.