Willem Hendrik Dokter

Title: **Willem Hendrik Dokter: Innovator in Silica Particle Technology**

Introduction

Willem Hendrik Dokter, located in Almere, Netherlands, is a notable inventor specializing in silica particle technology. With a total of two patents to his name, his innovations are making significant strides in the fields of cat litter and rubber reinforcement, particularly for tire production.

Latest Patents

Dokter's innovative work includes his latest patents:

1. **Precipitated Silica Particles for Cat Litter**

This invention relates to precipitated silica particles characterized by edged surfaces, exhibiting a length: width: depth ratio ranging from 1:1:1 to 3:3:1. These particles have lengths between 0.25 to 15 mm, an absorbing capacity (PV water) exceeding 125 wt. %, a pore volume (PV Hg) of 0.8 to 4 ml/g, and a pore volume (PV N2) of 0.2 to 1.5 ml/g. The bulk density is between 200 to 500 g/l, with a preferred pH less than 8, specifically designed for use as cat litter.

2. **Amorphous Silica Particles Comprising Boron**

This invention pertains to amorphous silica particles containing 0.1 to 10 ppm boron atoms, and optionally, 0.05 to 15 wt. % aluminum atoms. The boron and aluminum are covalently bonded to the oxygens in the silica network. These amorphous silica particles serve as reinforcing fillers for rubber articles, with a particular focus on tire treads.

Career Highlights

Willem Hendrik Dokter is affiliated with Grace GmbH & Co. KG, where he continues to contribute to advancements in silica technology. His dedication to innovation in material science has positioned him as an influential figure in the industry.

Collaborations

Throughout his career, Dokter has collaborated with esteemed colleagues such as Paulus Johannes Kunkeler and Willem Taede Hulshof. These partnerships foster an environment of creativity and innovation, further enhancing the technological advancements they pursue.

Conclusion

Willem Hendrik Dokter exemplifies the spirit of innovation, with his contributions to silica technology significantly impacting multiple industries. His patents reflect his commitment to enhancing product performance and functionality, setting a standard for future inventions in the field.