Company Filing History:
Years Active: 1988-1989
Title: Randi Johansen: Innovator in Aqueous Dispersions
Introduction
Randi Johansen is a notable inventor based in Bromma, Sweden. She has made significant contributions to the field of aqueous dispersions, particularly in their preparation and application in the paper industry. With a total of 2 patents, her work has had a substantial impact on the production of paper and related products.
Latest Patents
Randi's latest patents include innovative processes for creating aqueous dispersions. One of her patents focuses on a process for preparing aqueous dispersions of rosin and synthetic sizing agents. This invention involves a mixture of rosin and synthetic sizing agents, where the dispersions contain a polyaluminum compound. The preparation method includes homogenization of a homogeneous mixture, which can either incorporate the polyaluminum compound during production or add it to an aqueous dispersion of mixed particles. These dispersions serve as effective sizing agents in the production of paper, paperboard, and similar products.
Another significant patent by Randi involves aqueous cationic or anionic dispersions of rosin combined with certain synthetic sizing agents, such as carbamoyl chlorides, ketene dimers, or acid anhydrides. The particles in this dispersed phase also contain a mixture of rosin and synthetic sizing agents, prepared through homogenization in the presence of a dispersing agent. This innovation further enhances the utility of dispersions as sizing agents in the paper production process.
Career Highlights
Randi Johansen is currently associated with Casco Nobel AB, where she continues to develop her innovative ideas. Her work has been instrumental in advancing the technology behind aqueous dispersions, making her a key figure in her field.
Collaborations
Throughout her career, Randi has collaborated with notable colleagues, including Ulla Helmer and Ulf Carlson. These partnerships have contributed to her success and the advancement of her inventions.
Conclusion
Randi Johansen's contributions to the field of aqueous dispersions have established her as a prominent inventor. Her innovative patents and ongoing work at Casco Nobel AB continue to influence the paper industry significantly.
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