US Patent 7534821 - Polymeric aerogel nanocomposite moisture barrier

http://www.freepatentsonline.com/7534821.html

Laser printers and copiers are usually highly susceptible to environmental changes which can alter image quality. This patent from Xerox teaches how aerogel nanocomposites can be used as a coating to counteract such effects. Claim 1 reads:

1. A nanocomposite composition comprising:

one or more aerogel components, and one or more polymeric resin components;

wherein the nanocomposite composition is capable of absorbing water in an amount that is less than an amount that can be absorbed by the polymeric resin components, and wherein the one or more aerogel components comprise aerogel particles having an average particle size of less than about 500 Å.