Insulating Polyurethane Foams Containing Impregnated Aerogel Particles

Title: METHOD FOR MAKING ORGANIC FOAM COMPOSITES CONTAINING AEROGEL PARTICLES

 Number/Link: WO2013000861

Applicant/Assignee: Dow

Publication date: 3-01-2013

Gist”: Polyurethane or polyisocyanurate (or -less preferred- extruded foams like EPS foams) are produced in the presence of aerogel particles impregnated with blowing agents resulting in composite foams with exceptional insulation properties.

Why it is interesting: The blowing agent evaporates during the reaction (or extrusion),expands the foam and prevents the aerogel particles of losing their porosity and low density.  Already 0.1% w/w of the particles is claimed to have a significant impact on insulation properties.  In the examples an HFC blowing agent is used together with aerogel particles with an average size of about 1mm.
It appears that composites of aerogels together with PU or PIR, but also with PS and rockwool e.g. are becoming an ever more important trend in insulation.

Aerogel (Wikipedia)

Aerogel (Wikipedia)

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