David W Macomber

Title: David W. Macomber: Innovator in Reactive Polymeric Dyes

Introduction

David W. Macomber is a notable inventor based in Saint Paul, MN (US). He has made significant contributions to the field of polymer chemistry, particularly in the development of reactive polymeric dyes. With a total of 10 patents to his name, Macomber's work has had a substantial impact on various applications, including photoresist systems and electrophotography.

Latest Patents

Macomber's latest patents include innovative advancements in reactive polymeric dyes. One of his key inventions involves reactive polymeric dyes that comprise a chromophoric moiety derived from at least one free radically polymerizable dye and an azlactone moiety derived from 2-alkenylazlactone. This unique combination allows for the incorporation of the free radically polymerizable dye into the backbone of the polymer. Alternatively, the 2-alkenylazlactone can be polymerized and then derivatized with a nucleophilic dye, resulting in a chromophoric portion that is pendent to the polymer backbone. These reactive polymeric dyes can be utilized in photoresist systems, particularly in color proofing constructions.

Another significant patent focuses on liquid toners with hydrocarbon solvents. This invention features polymeric dyes that consist of segments rendering them soluble or dispersible in hydrocarbon solvents, along with segments that impart color. These polymeric dyes can be introduced into hydrocarbon solvents or formed within them to create stable colored dispersions, which are ideal for use as toners in electrophotography. The polymeric dye may also include charge-directing chelating moieties or surface-release promoting moieties, enhancing their functionality.

Career Highlights

David W. Macomber is currently associated with the Minnesota Mining and Manufacturing Company, a leading organization in the field of materials science and technology. His work at this company has allowed him to explore and develop innovative solutions in polymer chemistry.

Collaborations

Macomber has collaborated with notable colleagues, including Terrance P. Smith and Gary L. Holmes. These partnerships have contributed to the advancement of his research and the successful development of his patented technologies.

Conclusion

David W. Macomber stands out as a prominent inventor in the realm of reactive polymeric dyes. His innovative patents and contributions to polymer chemistry continue