Thomas Hassall, Jr

Title: Innovations of Thomas Hassall, Jr.

Introduction

Thomas Hassall, Jr. is an accomplished inventor based in Wilmington, DE (US). He has made significant contributions to the field of polymer chemistry, particularly in the development of processes involving polyvinyl alcohol (PVA). With a total of 2 patents to his name, his work has implications in various industrial applications.

Latest Patents

Hassall's latest patents include a dry blending process for the quaternization of polyvinyl alcohol. This innovative method involves blending polyvinyl alcohol under high shear conditions with a small amount of water, an excess of base, and a quaternizing agent containing a halohydrin radical and a quaternary ammonium group. The quaternization process achieves acceptable conversions of about 35% to well over 50%. The resulting quaternized polyvinyl alcohol has numerous applications, including use as a flocculating agent, stabilizing colloid, and in adhesive formulations. Another notable patent focuses on polyvinyl alcohol dust suppression by admixing polyglycol. This process prepares a substantially dust-free PVA powder by contacting the PVA with about 0.5% to 4.0% polyglycol, enhancing its usability in various applications.

Career Highlights

Hassall is currently employed at E.I. du Pont de Nemours and Company, where he continues to innovate and develop new materials and processes. His work has been instrumental in advancing the applications of polyvinyl alcohol in different industries.

Collaborations

Hassall collaborates with fellow inventor Aleksander Beresniewicz, contributing to the advancement of their shared projects and innovations.

Conclusion

Thomas Hassall, Jr. is a notable inventor whose work in polyvinyl alcohol has led to significant advancements in the field. His contributions continue to impact various industrial applications, showcasing the importance of innovation in material science.