John A Clark

Title: The Innovative Contributions of John A. Clark

Introduction

John A. Clark, a prominent inventor based in Seabrook, Texas, has made significant strides in the field of elastomers. With a total of three patents to his name, his innovative approaches have advanced the understanding and application of brominated elastomer compositions. His recent work showcases his dedication to improving material properties and processing methods.

Latest Patents

Among his notable inventions is the patent for "Mooney viscosity stable brominated elastomers." This invention focuses on a brominated elastomer composition that incorporates a free radical scavenger, which ensures that the Mooney viscosity does not increase beyond a specific range when subjected to elevated temperatures over an extended period. Specifically, the scavenger is present in a concentration of at least about 0.05 wt % and can include various stabilized forms, such as sterically hindered nitroxyl ethers or nitroxyl radicals.

Another significant patent involves the "Process for preparing a halogenated elastomer with improved Mooney viscosity stability." This patent details a method that enhances the stability of Mooney viscosity in a brominated elastomer. The process outlines steps including the polymerization of isomonoolefins, bromination of the resulting polymer, neutralization, and recovery of the final elastomer, with critical attention paid to the introduction of a Mooney stabilizer at appropriate stages.

Career Highlights

Throughout his career, John A. Clark has been associated with ExxonMobil Chemical Patents Inc., where he has applied his expertise to develop innovative solutions. His work has focused on the intersection of chemistry and material science, particularly concerning elastomer properties and applications.

Collaborations

In his innovative journey, Clark has collaborated with distinguished colleagues such as Sunny Jacob and Michael F. McDonald, Jr. Their combined efforts have fostered an environment of creativity and advancement, pushing the boundaries of elastomer technology further.

Conclusion

John A. Clark's contributions to the field of elastomers are a testament to his inventive spirit and dedication to improving material technologies. His patents continue to influence the industry, providing valuable insights and methodologies for future innovations. The advancements he has made will undoubtedly lead to further developments in the application of brominated elastomers across various sectors.