公开(公告)号：EP2150508A1

公开(公告)日：2010-02-10

申请号：EP08736497.2

申请日：2008-04-23

Applicant: BASF SE

Inventor： ULANOVA, Tatiana ,  ALTEHELD, Armin ,  HAHN, Klaus ,  DECK, Patrick ,  RANFT, Meik ,  HEILMANN, Frank

IPC: C04B28/02 ,  C04B38/00

CPC classification number: C04B35/638 ,  C04B35/14 ,  C04B38/10 ,  C04B2111/00362 ,  C04B2111/52 ,  C04B2201/20 ,  C04B2235/3418 ,  C04B38/0022 ,  C04B38/0058

Abstract: The invention relates to a method for the production of a silicate foam of lower density, which comprises the following steps: (a) partial saponification of an aqueous dispersion of SiO2 particulates which have an average particle diameter ranging from 1 to 100 nm, with a strong base; (b) addition of a surfactant and a blowing agent, and dispersion of the blowing agent at temperatures below 50°C; (c) foaming of the mixture by heating to a temperature ranging from 35° to 100°C or by relieving the pressure; (d) stabilization of the foam obtained in step (c) with a curing agent; (e) sintering of the foam at a temperature above 500°C.