Title:  METHOD FOR PRODUCING A POLYURETHANE FOAM AND POLYURETHANE FOAM OBTAINABLE THEREBY

Number: US2012238655

Publication date: 20-9-2012

Applicant/Assignee: Bayer IP

Gist: isocyanate and polyol reacted together with specific surfactante and blowing agent in supercritical state.

Why it is interesting: Heat insulation is a ‘hot’ topic in polyurethane research.  One way to improve insulation is to reduce cell size to nano-scale. This material is interesting because it combines both micron-scale cells as nano-scale cells which is claimed to result in improved insulation as well as mechanical properties.