Company Filing History:
Years Active: 1977-1983
Title: Innovations of William L. Carlstrom
Introduction
William L. Carlstrom is a notable inventor based in West Bend, Wisconsin. He has made significant contributions to the field of polyurethane foams, holding a total of four patents. His work focuses on developing materials with improved safety and performance characteristics.
Latest Patents
One of Carlstrom's latest patents is for a low smoke isocyanurate modified urethane foam and the method of making it. This innovation involves preparing low smoke isocyanurate modified polyurethane foams from polyols and a stoichiometric excess of reactive isocyanates. The process provides an --NCO/--OH index of 1.3-3.0, with a preference for 1.6-2.3. Catalysts are employed for the trimerization reaction of the isocyanate to the isocyanurate form. The polyol used includes a digestion product made by digesting polyalkylene terephthalate residues in organic polyols. The resulting foams exhibit unexpected properties in flame spread, smoke, and low friability, making them suitable for commercial applications. Another significant patent involves producing a flexible polyurethane foam with a low flame spread index. This foam is created by combining polyol, primarily diol and/or triol, with polyisocyanate, predominantly diisocyanate, in the presence of a foaming catalyst and a blowing agent. By incorporating at least 75% by weight of pentabromoethyl benzene, a flame spread index of less than 150 can be achieved, with some foams reaching a flame spread index of less than 25.
Career Highlights
William L. Carlstrom is associated with Freeman Chemical Corporation, where he continues to innovate in the field of chemical engineering and materials science. His work has led to advancements in the safety and efficiency of polyurethane foams.
Collaborations
Carlstrom has collaborated with notable coworkers, including Glenn R. Svoboda and Gary L. Maechtle, contributing to the development of innovative materials and processes.
Conclusion
William L. Carlstrom's contributions to the field of polyurethane foams demonstrate his commitment to innovation and safety in material science. His patents reflect a deep understanding of chemical processes and their applications in commercial products.