公开(公告)号：DE19525021A1

公开(公告)日：1997-01-16

申请号：DE19525021

申请日：1995-07-10

Applicant: HOECHST AG

Inventor： SCHWERTFEGER FRITZ DR ,  ZIMMERMANN ANDREAS DR

IPC: C01B33/16 ,  C04B14/06 ,  C07F7/10 ,  C08G77/02 ,  C07F7/18 ,  C08G77/38

Abstract: The invention concerns a process for preparing organically modified aerogels, in which: a) a silicate-like lyogel or hydrogel is prepared; b) optionally the gel prepared in step a) is subjected to complete or partial conversion of the solvent into an organic solvent; c) the gel obtained in step a) or b) is reacted with at least one silylation agent; d) optionally the silylated gel obtained in step c) is washed with an organic solvent; and e) the gel obtained in step c) or d) is dried subcritically. The invention further concerns the use of these aerogels.

公开(公告)号：DE4422912A1

公开(公告)日：1996-01-11

申请号：DE4422912

申请日：1994-06-30

Applicant: HOECHST AG

Inventor： JANSEN ROLF-MICHAEL DR ,  ZIMMERMANN ANDREAS DR

IPC: F16L59/00 ,  C01B33/154 ,  C01B33/16 ,  C04B30/00 ,  C01B33/157

Abstract: Xerogels are manufactured from a soln. of water glass brought to pH ≤ 3 with an acid ion exchange resin or a mineral acid. The silicic acid obtained is polycondensed to a SiO2 gel by the addn. of a base. If mineral acid was used in the 1st step, the gel is washed free of electrolyte with H2O. Water is removed from the gel by extractive distillation with an organic solvent that forms an azeotrope that separates into 2 phases on cooling. The water content is reduced to ≤ 5 wt.%. The resulting gel is dried at below the critical temp. and below the critical pressure of the organic solvent used for extractive distillation. äU

公开(公告)号：DE4404701A1

公开(公告)日：1995-08-17

申请号：DE4404701

申请日：1994-02-15

Applicant: HOECHST AG

Inventor： BEHME KLAUS JUERGEN DIPL ING ,  JANSEN ROLF-MICHAEL DR ,  ZIMMERMANN ANDREAS DR

IPC: C08J9/02 ,  C01B33/158 ,  C04B26/02 ,  C04B38/08 ,  C08J9/00 ,  C08J9/04 ,  C08J9/12 ,  C08K3/36 ,  C08L75/04 ,  C08G18/08 ,  F16L59/00

Abstract: Composite foam (I) contains: (a) 10-90 vol.% SiO2 aerogel particles, and (b) 90-10 vol.% plastic foam. Also claimed is a process for the prodn. of (I) by reacting a plastic foam compsn. contg. aerogel particles (a) in amts. of 10-90 vo.% w.r.t. the intended vol. of (I).

公开(公告)号：DE19548128A1

公开(公告)日：1997-06-26

申请号：DE19548128

申请日：1995-12-21

Applicant: HOECHST AG

Inventor： FRANK DIERK DR ,  ZIMMERMANN ANDREAS DR ,  THOENNESSEN FRANZ

IPC: C04B30/02 ,  D04H1/54 ,  D04H1/542 ,  D04H13/00 ,  C08J5/18 ,  B32B5/02 ,  B32B31/26 ,  B01J20/10 ,  F16L59/02

Abstract: The invention relates to a composite material which has at least one formation comprising fibres and aerogel particles and is characterised in that the fibrous formation contains at least one thermoplastic fibrous material to which the aerogel particles are bound and by which the fibres in the formation are bound together. It also relates to a process for the production of said composite material, and the use thereof.

公开(公告)号：DE4441567A1

公开(公告)日：1996-05-30

申请号：DE4441567

申请日：1994-11-23

Applicant: HOECHST AG

Inventor： FRANK DIERK DR ,  ZIMMERMANN ANDREAS DR ,  STUHLER HELMUT G

IPC: C04B14/04 ,  C04B14/06 ,  C04B16/04 ,  C04B28/00 ,  C04B28/02 ,  C04B28/24 ,  C04B38/08 ,  E04B1/78 ,  C04B20/00 ,  E04B1/76 ,  F16L59/00

Abstract: The invention concerns: a composite material containing a quantity of aerogel particles equivalent to 10-95 % by volume and at least one inorganic binder; a process for manufacturing said composite material; and the use thereof.

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.

公开(公告)号：DE19719395A1

公开(公告)日：1998-11-12

申请号：DE19719395

申请日：1997-05-07

Applicant: HOECHST AG

Inventor： SIEVERS WERNER DR ,  ZIMMERMANN ANDREAS DR

IPC: B01D53/04 ,  C02F1/28 ,  C12P35/06 ,  B01J20/00 ,  A61K31/545 ,  B01D15/08 ,  B01D53/02 ,  C12P1/00

Abstract: The uses is claimed of: (i) aerogels (AG) for adsorption from a liquid phase; (ii) hydrophilic or hydrophobic AG as adsorbents; and (iii) adsorbents containing AG (not as a mixture with activated carbon or active alumina) for adsorption from a gas phase. Also claimed are: (a) corresponding purification methods, involving contacting (i') liquids, (ii') gases or liquids or (iii') gases to be purified with adsorbents as in (i), (ii) or (iii) respectively, for adsorption of impurities; and (b) a method for isolating organic compounds (I) from (preferably aqueous) liquids, by contacting the liquids with AG as adsorbent for sufficient time to adsorb (I), separating AG from the liquid and separating (I) from AG.

公开(公告)号：DE19716372A1

公开(公告)日：1998-10-22

申请号：DE19716372

申请日：1997-04-18

Applicant: HOECHST AG

Inventor： SIEVERS WERNER DR ,  ZIMMERMANN ANDREAS DR

IPC: B01D15/00 ,  B01D53/02 ,  C02F1/28 ,  B01J20/00 ,  C07B63/04

Abstract: Use of aerogels as adsorption material for adsorption in liquid phase is new. Also claimed are: (1) the use of hydrophobic and hydrophilic aerogels as adsorption material, and (2) the use of adsorption materials containing aerogels which are not mixed with active carbon or active aluminium oxide, for adsorption in a gas phase.

公开(公告)号：DE19507732A1

公开(公告)日：1996-09-12

申请号：DE19507732

申请日：1995-03-07

Applicant: HOECHST AG

Inventor： FRANK DIERK DR ,  ZIMMERMANN ANDREAS DR

IPC: E06B3/66 ,  B32B5/18 ,  B32B17/10 ,  B32B17/12 ,  C03C27/06 ,  E04C2/54 ,  E06B3/67 ,  E06B3/677 ,  B32B17/06 ,  B32B7/12 ,  E04C1/42

Abstract: The invention concerns a transparent component comprising at least two parallel plates of transparent material with a space therebetween. The space contains at least one fibre-reinforced aerogel plate and/or mat. The invention further concerns the use of this component.

公开(公告)号：DE4430669A1

公开(公告)日：1996-03-07

申请号：DE4430669

申请日：1994-08-29

Applicant: HOECHST AG

Inventor： FRANK DIERK DR ,  KESSLER BIRGIT ,  ZIMMERMANN ANDREAS DR

IPC: C04B28/24 ,  B01J13/00 ,  C01B13/32 ,  C01B33/16 ,  C04B30/02 ,  C04B38/00 ,  C04B35/80 ,  C04B35/14 ,  C01F7/02 ,  C09K3/00 ,  D04H1/42 ,  D04H1/58 ,  F16L59/00

Abstract: A process is disclosed for producing modified, fibre-reinforced xerogels with porosities above 60 % and a xerogel matrix with less than 0.6 g/cm density, as well as their use as thermal insulating materials.