Hisashi Nanno

Title: Hisashi Nanno: Innovator in Polyurethane Technology

Introduction

Hisashi Nanno is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of polyurethane technology, particularly through his innovative patent related to curing agents.

Latest Patents

Hisashi Nanno holds a patent for a polyisocyanate curing agent and paint and adhesive compositions. The invention provides a curing agent comprising a polyisocyanate compound obtained from hexamethylene diisocyanate. This compound contains not more than 0.5% by weight of hexamethylene diisocyanate monomer, 21 to 60% weight of uretidine dione dimer, and 11 to 40% by weight of isocyanurate cyclic trimer. The uretidine dione dimer and isocyanurate cyclic trimer are prepared from a product obtained by urethane modification of 0.5 to 15 mole % of the total isocyanate groups of hexamethylene diisocyanate. This modification is achieved using a dihydric alcohol with at least two hydroxyl groups and a branched hydrocarbon group containing 4 to 35 carbon atoms. The resulting curing agent exhibits low viscosity and good compatibility with solvents, providing a polyurethane paint or adhesive composition with excellent curing properties, drying properties, adhesion strength, and weathering resistance.

Career Highlights

Hisashi Nanno is associated with Nippon Polyurethane Industry Co., Ltd., where he has been instrumental in advancing polyurethane technologies. His work has led to the development of innovative products that enhance the performance of paints and adhesives.

Collaborations

He has collaborated with notable colleagues such as Susumu Sato and Mitsuhiro Yoshida, contributing to the advancement of their shared field.

Conclusion

Hisashi Nanno's contributions to polyurethane technology through his patent demonstrate his innovative spirit and commitment to improving industrial applications. His work continues to influence the development of high-performance materials in the industry.