Minoru Takezawa

Title: Minoru Takezawa and Rigid Polyurethane Foam Innovations.

Introduction

Minoru Takezawa is an inventor associated with Ohta, Japan, and Sanyo Electric Co., Ltd. His patent work focuses on rigid foamed polyurethane, including methods for mixing foaming agents and approaches to insulation performance. His listed portfolio includes 2 patents.

Latest Patents

“Method for the Mixing of Low-Boiling Foaming Agent” describes blending a polyol in advance with a measured amount of a low-boiling foaming agent, such as HCFC-22, while the agent is in liquid form. The method is intended to help supply the ingredients uniformly to a polyurethane foaming system, supporting a homogeneous reaction and foam with consistent cells and fewer voids.

“Rigid Foamed Polyurethane and Process for the Manufacture of the Same” concerns rigid polyurethane foam made substantially of closed cells containing HCFC-22 and carbon dioxide. The patent describes using HCFC-22, alone or blended with HCFC-142b, as a foaming agent. It also addresses thermal insulation at very low temperatures and the foam’s flame resistance and stability of insulating properties.

Career Highlights

Takezawa’s listed inventions address both the preparation of polyurethane foam and the properties of the finished material. Together, they reflect an emphasis on uniform foam structure, thermal insulation, and the selection of foaming agents for rigid polyurethane applications.

Collaborations

Takezawa’s listed coworkers include Shigeo Yatsu and Fumihisa Endo. His company affiliation is Sanyo Electric Co., Ltd.

Conclusion

Minoru Takezawa’s patent work centers on practical improvements to rigid polyurethane foam, from controlled mixing of foaming agents to insulation performance in demanding conditions.