Johan Stijntjes

Title: Innovations of Johan Stijntjes

Introduction

Johan Stijntjes is a notable inventor based in Alkmaar, Netherlands. He has made significant contributions to the field of conveyor technology and polymer chemistry. With a total of 2 patents, his work reflects a commitment to innovation and practical applications in industry.

Latest Patents

Johan's latest patents include a unique conveyor belt designed specifically for trough conveyors. This conveyor belt is made from synthetic materials such as polyvinyl chloride, polyolefin, polyurethane, and polyester. It features at least one fabric embedded within it, consisting of wrap and weft. The weft thread material is composed of multiple monofilament threads, which can range from two to ten in number. Additionally, the thread material may have a twine of 40 to 80 twists per meter and a titre of 100 to 1000 dtex.

Another significant patent involves a process for preparing aqueous dispersions of acrylic-urethane grafts. This innovative method allows for the creation of ethylenically unsaturated aqueous urethane dispersions of controlled molecular weight. The process begins with the reaction of an active hydrogen atom-containing polymerizable vinyl compound with a diisocyanate, resulting in a monoacrylated diisocyanate adduct. This adduct is then utilized to prepare an aqueous urethane polymer dispersion, which is subjected to emulsion polymerization with various polymerizable compounds. The resulting urethane-acrylate graft copolymers are particularly useful as binders for coatings and printing inks.

Career Highlights

Throughout his career, Johan has worked with several prominent companies, including Ammeraal Conveyor Belting B.V. and Polyvinyl Chemie Holland B.V. His experience in these organizations has allowed him to refine his skills and contribute to advancements in conveyor technology and polymer applications.

Collaborations

Johan has collaborated with notable coworkers such as Simon J. Roet and Walter M. Zom. These partnerships have fostered a creative environment that has led to innovative solutions in their respective fields.

Conclusion

Johan Stijntjes is a distinguished inventor whose work in conveyor technology and polymer chemistry has made a lasting impact. His patents demonstrate a blend of creativity and practicality, showcasing his dedication to advancing industrial applications.