Theeraphol Piachan

Title: Theeraphol Piachan: Innovator in Synthetic Polyisoprene Latex Condoms

Introduction

Theeraphol Piachan is a notable inventor based in Chonburi, Thailand. He has made significant contributions to the field of materials science, particularly in the development of synthetic polyisoprene latex condoms. His innovative approach has led to advancements that enhance the safety and performance of these products.

Latest Patents

Theeraphol Piachan holds a patent for "Synthetic polyisoprene latex condoms with reduced nitrosamine." This invention involves a synthetic polyisoprene latex emulsion that includes both pre-vulcanization and post-vulcanization compositions. The pre-vulcanization composition utilizes insoluble amorphous sulfur extracted with a zinc dithiocarbamate catalyst at 20° C. This process forms a sulfur chain that is transported to the interior of the synthetic polyisoprene particle, creating a physical attachment of sulfur to active sites. The degree of pre-vulcanization is verified through a swelling index test, which measures the expansion of a cast and dried film of latex in toluene within 20 minutes. The latex emulsion is then vulcanized at temperatures ranging from 90° C. to 120° C. for 3 to 5 minutes. The post-vulcanization composition incorporates accelerators that crosslink the synthetic polyisoprene particles, ensuring uniform curing in both inter-particle and intra-particle regions. This results in high cross-link density and a uniform distribution of double bonds, with zinc segregation at the boundaries of the original particles. The final product exhibits high tensile strength, tensile modulus, elongation, and excellent tear strength, while releasing below 10 ppb of nitrosamines.

Career Highlights

Theeraphol Piachan is associated with Thai Nippon Rubber Industry Public Company Limited, where he has applied his expertise in rubber technology. His work has not only contributed to the company's product line but has also set new standards in the industry for safety and performance.

Collaborations

He has collaborated with notable coworkers, including Pathompong Chupayak and Supparat Piachan, who have contributed to his research and development efforts.

Conclusion

Theeraphol Piachan's innovative work in synthetic polyisoprene latex condoms represents a significant advancement