A method and, in particular provided to this blowing agents for the production of pu - od. The like. Foam

摘要

described is a process for the manufacture of pu - 2) foam, in which the traditional rezepturkomponenten before the verschu00e4umen an aqueous ammonia solution is added.as the propellant fungierendes carbon dioxide reacts with the ammonia forming ammoniumcarbonat which closed pores of the schaumstoffes as thin film auskleidet and the release of carbon dioxide and, if appropriate, available nitrogen in the pores is prevented.the isolationsvermu00f6gen of schaumstoffes which is stable for a long time, so that the cfc free foam is a good substitute for fluorkunststoff represents.