| abstract |
(57) [Summary]nA novel microporous isocyanate-based xerogel composition is disclosed. This composition comprises (1) (a) a polyisocyanate component, (b) a solvent that does not substantially react with the polyisocyanate component, and optionally (c) a polymerization catalyst, water, an active hydrogen compound, or a mixture thereof. , Mixed under conditions sufficient to form a gel, provided that (b) does not function to catalyze the polymerization, (c) is included, and (2) sufficient to form a microporous xerogel composition. Manufactured by a method characterized by removing the solvent under various non-supercritical conditions. The composition is easily evacuated for use in insulation applications such as vacuum panels for use as insulation in appliances and is superior to conventional rigid polyurethane open cell foams used in similar applications, for example. The K factor is shown. |