Nathaly Vassal

Title: Nathaly Vassal: Innovator in Photochromic Polyurethane Technologies

Introduction

Nathaly Vassal, an inventive mind based in Paris, France, has made significant contributions to the field of ophthalmic optics. As a dedicated researcher and inventor, she is known for her innovative methods related to photochromic materials, specifically within the realm of polyurethane latex.

Latest Patents

Nathaly Vassal holds a notable patent titled "Method for preparing a photochromic polyurethane latex and application to ophthalmic optics." This invention outlines a meticulous process involving several critical steps: first, forming a hydrophilic polyurethane prepolymer through a polyaddition reaction using polyols and diisocyanates with an internal emulsifying agent. Following this, she combines the prepolymer with a photochromic agent, and then introduces water or a solvent mixture to create an emulsion. Finally, a chain extension agent is added, which facilitates a chain extension reaction to yield the final product—a photochromic polyurethane latex tailored for ophthalmic applications.

Career Highlights

Nathaly has been instrumental in advancing optical technologies within her field. Her work at Essilor International, a leader in ophthalmic optics, underscores her commitment to innovation. With her patent, she has opened new avenues for producing ophthalmic articles that exhibit photochromic properties, enhancing the functionality and usability of eyewear products.

Collaborations

During her career, Nathaly Vassal has collaborated with esteemed colleagues, including Jean-Pierre Vairon and Bernadette Charleux. These partnerships have enriched her research, leading to advancements that not only benefit the company but also contribute to the broader scientific community in ophthalmology.

Conclusion

Nathaly Vassal's contributions to the field of ophthalmic optics through her innovative patent reflect her dedication to enhancing the quality of optical materials. Her work at Essilor International signifies her role in pushing the boundaries of optical technology, offering improved solutions that benefit consumers and the industry alike. As innovations in this field continue to evolve, Nathaly’s work will undoubtedly serve as a foundation for future advancements.