公开(公告)号：DE4416330A1

公开(公告)日：1995-11-16

申请号：DE4416330

申请日：1994-05-09

Applicant: HOECHST AG

Inventor： SCHEUNEMANN UDE DR ,  ALTHOFF OLAF DR ,  HICKEL WERNER DR ,  APPEL GUNTHER ,  BAUER JACQUELINE ,  GEIS GERHARD

IPC: B01D69/12 ,  B01D71/70 ,  B32B5/18 ,  C08J3/24 ,  C08J5/18 ,  C08L83/02 ,  C08L83/04 ,  B01D67/00 ,  B01D61/36 ,  B01D53/22

Abstract: The prodn. of composite membranes comprises spreading a soln. of a polymer (I) in a volatile solvent on water. Allowing the solvent to evaporate, crosslinking the polymer and transferring the film obtd. to a supporting membrane. Also claimed is a composite membrane with polymer layer(s) on a porous base membrane, obtd. by this process. (I) is a polysiloxane which is pref. crosslinked via OH gps. on the polymer, with the aid of a bi-, tri- or tetra-functional silane with hydrolysable SiO- gps. as crosslinker (II), pref. triacetoxy-methyl-silane (TACMS), in the presence of a catalyst, pref. a tin salt. Alternatively, (I) may be a polymer contg. olefinic double bonds, which is crosslinked by irradiation. Pref. polymer layer is a protective layer of polysiloxane, crosslinked via OH gps. to a structure contg. units of formula Si(O-)4, R-Si(O-)3 or RR Si(O-)2 (with R, R = alkyl, phenyl or vinyl), or a silicone which is crosslinked by irradiation.

公开(公告)号：DE4437424A1

公开(公告)日：1996-04-25

申请号：DE4437424

申请日：1994-10-20

Applicant: HOECHST AG

Inventor： GEIS GERHARD ,  MUELLER HANS-KARL ,  PRAS WERNER DR ,  SCHEUNEMANN UDE DR ,  ZIMMERMANN ANDREAS DR

IPC: C08J3/12 ,  C01B33/14 ,  C01B33/145 ,  C01B33/16 ,  C04B14/06 ,  C04B20/00 ,  C04B30/02 ,  C04B38/08 ,  C08J3/20 ,  C08K3/36 ,  C08L101/00 ,  C09J1/00 ,  C09J11/04 ,  C09K21/00 ,  C09D5/02 ,  C09D5/18 ,  F16L59/00

Abstract: The invention concerns a composition containing 30-95 % by volume aerogel particles and at least one aqueous binder. The aerogel particles are less than 0.5 mm in diameter and are preferably provided with hydrophobic surface groups. The invention also concerns a method of producing said particles and the use thereof.