Location History:
- Asheville, NC (US) (1981)
- Norton, MA (US) (1981 - 1984)
Company Filing History:
Years Active: 1981-1984
Title: Innovations of David A Johnson
Introduction
David A Johnson is a notable inventor based in Norton, MA (US), recognized for his contributions to the field of polymer chemistry. With a total of four patents to his name, Johnson has made significant advancements in the stabilization and processing of polymers.
Latest Patents
Among his latest patents is a method for the prevention of hydrolysis of polyesterification catalysts. This innovative approach involves the use of aluminum sulfate as a desiccant for drying the starting materials used in polymerization reactions that employ readily hydrolyzable catalysts. The aluminum sulfate can remain in the reaction mixture during polymerization and may even be retained in the reaction product without causing any adverse effects. Another significant patent is for polyester/polyether segmented copolymers that are stabilized against degradation by UV light. This is achieved through copolymerization with novel diesters and/or bis-hydroxyalkyl terminated derivatives of 2,2,6,6-tetramethylpiperidines.
Career Highlights
David A Johnson is currently associated with Akzona Incorporated, where he continues to innovate in the field of polymer chemistry. His work has contributed to advancements that enhance the durability and performance of various polymer products.
Collaborations
Throughout his career, Johnson has collaborated with esteemed colleagues such as Kenneth B Wagener and Ronald W Worley. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.
Conclusion
David A Johnson's contributions to polymer chemistry through his patents and collaborations highlight his role as a significant inventor in the field. His innovative methods and approaches continue to influence the industry and pave the way for future advancements.