A low-temperature foam compositions and that are produced from an epoxy compound and an acid source can be substantially free of polyurethane or isocyanate chemistry. The disclosed compositions and precursors thereof reduce, if not eliminate, the presence of conventional undesirable compounds and by-products...http://www.google.de/patents/US20020115737?utm_source=gb-gplus-sharePatent US20020115737 - Novel foraming compositions and methods for making and using the composition
