Title: AEROGEL-CONTAINING POLYURETHANE COMPOSITE MATERIAL

 Number/Link: WO2013182506 (German)

Applicant/Assignee: BASF

Publication date: 12-12-2013

“Gist”: An aqueous dispersion based on an isocyanate and an isocyanate-reactive vinyl polymer is used to bind aerogel particles into an insulation material.

Why it is interesting: Binding (silica) aerogel (or xerogel or cryogel) particles into insulation panels using aqueous polyurethane binders is known.  See e.g. my previous posts on the subject here, here and here. According to this invention both the insulation and processing properties of existing systems can be improved by using an aqueous dispersion of a vinyl polymer containing isocyanate-reactive side groups, together with an emulsifiable isocyanate. The polyvinyl is preferably water-soluble, the side groups being -OH, -SH, -NH2 or -COOH,  a (preferred) example being poyvinylamine with a molecular weight from 10,000 to 500,000. The isocyanate used is preferably a modified HDI or IPDI.  In the examples materials are shown with densities of about 120 kg/m³ and a thermal conductivity of about 16 mW/m.K.

SLENTITE (TM) aerogel-PU insulation panel by BASF