公开(公告)号：DE10248307A1

公开(公告)日：2004-04-29

申请号：DE10248307

申请日：2002-10-16

Applicant: BASF AG

Inventor： FALKE PETER ,  ROTERMUND UDO ,  HEMPEL RENATE ,  VIETH SIEGFRIED

IPC: C04B38/06 ,  C08G18/48 ,  C08K3/22 ,  C08L75/04 ,  C08J9/16

Abstract: Ceramic foams are prepared by reaction of organic and/or modified organic polyisocyanates with a polyetherol mixture comprising a mixture of bifunctional polyetherols and up to 60 wt.% of a suitable inorganic solid followed by drying and baking. Ceramic foams (I) are prepared by reaction of organic and/or modified organic polyisocyanates (A) with a polyetherol mixture (B) and optionally other hydrogen atom containing compounds (C) that are reactive with isocyanates in the presence of water and/or other propellants (D), catalysts (E) and processing aids and additiives (F) followed by drying and baking whereby the polyetherol mixture (B) comprises at least 60 wt.% of at least one bifunctional polyetherol (B1) having an OH number of 20-150 mgKOH/g based on propylene oxide and/or butylene oxide and ethylene oxide whereby the ethylene oxide content is greater than 40 wt.% (with respect to the total quantity of alkylene oxide) and up to 40 wt.% of at least one bifunctional polyetherol (B2) having an OH number of greater than 25 mgKOH/g based on propylene oxide and/or butylene oxide and up to 60 wt.% of a suitable inorganic solid (F1) (with respect to all components (B)-(F).