| abstract |
Organosiloxane copolycondensates are disclosed and which are optionally cross-linked by means of cross-linking agents containing Si, Ti, Zr and/or Al and contain the units ##STR1## wherein R 1 -R 5 are ##STR2## wherein R 6 is alkylene with C 1 -C 10 bound directly to N or X, cycloalkylene with C 5 -C 8 or ##STR3## X is >N--H, >N--CH 3 , >N--C 2 H 5 , --S--, --S 2 --, --S 3 --, --S 4 --, ##STR4## wherein R" is H or alkyl with C 1 -C 5 . These products are in the form of spherical particles with a diameter of 0.01 to 3.0 mm, a specific surface of up to 1000 m 2 /g, a specific pore volume of up to 6.0 ml/g and a bulk density of 50 to 1000 g/l. Different methods of preparing the formed copolycondensates are disclosed as well as use of certain compositions for removing metals from solutions and/or for the adsorption of gaseous organic compounds and/or of water vapor. |