Andrew B Holmstrem

Title: **Andrew B Holmstrem: Innovator in Polyurethane Foam Technology**

Introduction

Andrew B Holmstrem, an accomplished inventor based in Burlington, MA, has made significant strides in the field of polyurethane foam technology. With two patents to his credit, Holmstrem's innovations showcase his commitment to enhancing material properties and applications in various industries.

Latest Patents

Holmstrem's most notable patents include the "Polyurethane foam sheet and method" and a "Foam sheet fabric." The first patent discloses a composite, self-supporting polyurethane foam sheet prepared by forming an aqueous dispersion of hydrophilic polyurethane foam particles combined with fibers to create a binder. This innovative method involves wet-layering the dispersion onto a supporting screen to form a sheet, followed by water removal. The result is a product that can either be in sheet form or as a laminar composite structure, combining desirable softness and cushioning feel.

His second patent focuses on a foam sheet fabric created using a hydrophilic crosslinked polyurethane component. This component is synthesized by reacting an isocyanate capped polyoxyethylene polyol reactant with large quantities of an aqueous reactant. The resulting fabrics exhibit a broad spectrum of improved properties such as enhanced comfort, moisture control, and processing ease. Additionally, selective additives like fibers and fire retardants can be incorporated for further enhancement.

Career Highlights

Andrew B Holmstrem is associated with W. R. Grace & Co., a company known for its innovative solutions in various markets, including specialty chemicals and construction materials. Holmstrem's work is pivotal in advancing the company's product offerings, particularly in the realm of advanced polyurethane foams.

Collaborations

Throughout his career, Holmstrem has collaborated with notable colleagues including Irving E Isgur and Norman J Hayes. These collaborations have contributed to his success as an inventor and have fostered a productive environment for innovation within his field.

Conclusion

Andrew B Holmstrem stands out as a key innovator in polyurethane foam technology. His patents reflect a dedication to improving material properties and applications, paving the way for advancements in industries that utilize foam materials. As he continues to contribute to the field, his legacy as an inventor is firmly established.