Chin-Jui Chang

Title: Chin-Jui Chang and Low Compression Set Urethane Foam

Introduction

Chin-Jui Chang is an inventor associated with Detroit, Michigan, and Gm Global Technology Operations, Inc. His patent work addresses urethane foam technology, particularly the challenge of filling small voids in integrated foam parts while maintaining low compression set.

Latest Patents

Chang is credited with 1 patent, titled “Method of Making Low Compression Set Urethane Foams.” The invention describes a high-resilience urethane foam designed to fill small voids formed during the molding of integrated foam parts without allowing foaming liquids to penetrate existing foam cells. It also aims to achieve very low compression set across a wide range of isocyanate indices.

The disclosed foaming system uses two thixotropic components: a polyisocyanate component and a polyol component. Benzal sorbitol is added to each component to provide thixotropic properties. The polyol component combines a polyolefinic polyol and a polyoxyalkylene polyol in a specified weight ratio, along with a blowing agent, surfactant, and catalyst.

Career Highlights

Chang’s listed patent reflects work on materials and processes for producing high-resilience urethane foam. Its focus is on improving void filling and compression-set performance in integrated foam parts.

Collaborations

The supplied information lists Robert James Hoye and Vabilisetti S. Murty as Chang’s coworkers. It does not specify their roles in the patent or the nature of their collaboration.

Conclusion

Chin-Jui Chang’s patent focuses on a thixotropic urethane foaming system intended to fill small voids in integrated foam parts while preserving low compression-set performance.