EP0979142A1 - Procede de compactage d'aerogels - Google Patents

Procede de compactage d'aerogels

Info

Publication number
EP0979142A1
EP0979142A1 EP98925497A EP98925497A EP0979142A1 EP 0979142 A1 EP0979142 A1 EP 0979142A1 EP 98925497 A EP98925497 A EP 98925497A EP 98925497 A EP98925497 A EP 98925497A EP 0979142 A1 EP0979142 A1 EP 0979142A1
Authority
EP
European Patent Office
Prior art keywords
starting material
pressed
aerogels
granules
airgel particles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP98925497A
Other languages
German (de)
English (en)
Inventor
Marc Schmidt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cabot Corp
Original Assignee
Cabot Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cabot Corp filed Critical Cabot Corp
Publication of EP0979142A1 publication Critical patent/EP0979142A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/20—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by expressing the material, e.g. through sieves and fragmenting the extruded length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/08—Making granules by agglomerating smaller particles

Definitions

  • the present invention relates to a method for compacting aerogels.
  • Aerogels in particular those with porosities above 60% and densities below 0.6 g / cm 3 , have an extremely low thermal conductivity and are therefore used as heat insulation material, as described in EP-A-0 1 71 722, as catalysts or Catalyst carrier, as well as an adsorbent material.
  • the use for Cerenkov detectors is known due to their very low refractive index for solids.
  • the literature describes a possible use as an impedance matching, for example in the ultrasound range, due to its special acoustic impedance.
  • Aerogels in the broader sense ie in the sense of "gel with air as the dispersion medium" are produced by drying a suitable gel.
  • airgel in this sense includes aerogels in the narrower sense, xerogels and cryogels.
  • a dried gel is referred to as an airgel in the narrower sense if the liquid of the gel is largely removed at temperatures above the critical temperature and starting from pressures above the critical pressure. If, on the other hand, the liquid of the gel becomes subcritical, for example with the formation of a liquid-vapor boundary phase removed, the resulting gel is often referred to as xerogel.
  • aerogels in the broad sense, i.e. in the sense of "gel with air as a dispersion medium”.
  • the term does not include xerogels known from the older literature, which e.g. obtained by precipitation of silica (e.g. DE 3025437, DD 296 898), or as pyrogenic silica, e.g. Aerosil TM. In these cases, a homogeneous three-dimensional gel network is not formed over large distances during production.
  • Inorganic aerogels have been known since 1 931 (SS Kistler, Nature 1 931, 1 27.741). Since then, aerogels have been made from a wide variety of starting materials.
  • z. B. SiO 2 -, Al 2 O 3 -, TiO 2 -, ZrO 2 -, SnO 2 -, Li 2 O-, CeO 2 -, V 2 O 5 -Aerogels and mixtures of these can be prepared (H .D. Gesser, PCGoswami, Chem. Rev. 1 989, 89.765ff).
  • organic aerogels made from a wide variety of starting materials, e.g. from Meiamine formaldehyde, known (R.W. Pekala, J. Mater. Sci. 1 989, 24, 3221).
  • Inorganic aerogels can be produced in different ways.
  • SiO 2 aerogels can be produced, for example, by acid hydrolysis and condensation of tetraethyl orthosilicate in ethanol. This creates a gel that is obtained by supercritical drying while maintaining the structure can be dried. Manufacturing processes based on this drying technique are known, for example, from EP-A-0 396 076, WO 92/03378 or WO 95/0661 7.
  • An alternative to supercritical drying is a method for subcritical drying of SiO 2 gels.
  • the SiO 2 gel can be obtained, for example, by acid hydrolysis of tetraalkoxysilanes in a suitable organic solvent using water. After replacing the solvent with a suitable organic solvent, the gel obtained is reacted with a silylating agent in a further step. The resulting SiO 2 gel can then be dried in air from an organic solvent. This enables aerogels with densities below 0.4 g / cm 3 and porosities above 60% to be achieved. The manufacturing process based on this drying technique is described in detail in WO 94/25149.
  • the gels described above can also be mixed with tetraalkoxysilanes and aged in the alcohol-aqueous solution before drying in order to increase the gel network strength, as disclosed in WO 92/20623.
  • the tetraalkoxysilanes used as starting materials in the processes described above also represent an extremely high cost factor.
  • a not inconsiderable cost reduction can be achieved by using water glass as the starting material for the production of the SiO 2 gels.
  • a silica can be produced from an aqueous water glass solution with the aid of an ion exchange resin, and this polycondenses into an SiO 2 gel by adding a base. After replacing the aqueous medium with a suitable organic solvent, the gel obtained is then reacted with a chlorine-containing silylating agent in a further step. The resulting, on the surface z. B. modified with methylsilyl groups SiO 2 gel can also be dried in air from an organic solvent. The manufacturing method based on this technique is known from DE-A-43 42 548.
  • DE-A-1 95 02 453 also describes the use of chlorine-free silylating agents in the production of subcritically dried aerogels.
  • DE-A-1 95 34 1 98 also describes organofunctionalization using organofunctionalized silylating agents in the production of subcritically dried aerogels.
  • airgel particles are, however, for the sake of Process engineering and the manufacturing costs on an industrial scale limited to particle sizes smaller than 5 mm, preferably smaller than 2 mm.
  • the object of the present invention is therefore to provide a method by means of which small airgel particles below 2 mm can be formed into larger airgel particles.
  • This object is achieved by a method in which the airgel particles are placed in a pressing device and pressed. In this way, it is particularly easy to form small airgel particles into larger airgel particles.
  • these additives, fillers and / or binders are advantageously added, which may be in particulate and / or fibrous form, optionally also liquid or pasty.
  • the starting material is degassed before pressing. This is particularly advantageous if the starting material is a loose bed, since then a certain proportion of the gas located between the airgel particles must be removed before compacting.
  • the starting material for degassing is expediently subjected to a negative pressure, and in another embodiment the degassing can also take place during the pressing.
  • the airgel particles or the starting material can be pressed into granules, after which they are then advantageously separated according to their size. This can be done, for example, by sieving the desired particle size range in order to obtain the desired target fraction. Granules lying below the desired grain size range are advantageously returned to the pressing device, while granules lying above are expediently comminuted so that they lie in the desired grain size range. After crushing, they can also be fed directly back to the pressing device in order to be compacted again.
  • the granulate is then dried before further processing in order to remove undesirable residual moisture or harmful residual moisture for the further course of the process.
  • the starting material can also be pressed into a slug, which is then also dried in accordance with a further embodiment before a further process step.
  • the airgel particles or the airgel particles with possible additives can be pressed using customary suitable pressing devices.
  • Another embodiment provides that the starting material is pressed into a die by a punch.
  • the resulting compacts can then optionally be cut to the desired size with a knife, a scraper or the like.
  • the starting material is pressed between a die and a roller sliding or rolling over it.
  • the die can be perforated, in which case the resulting compacts are advantageously cut off in the desired size on the exit side with a knife, a scraper or the like.
  • the starting material is pressed between two rollers, at least one of which rotates, but advantageously both.
  • the starting material is then expediently pressed into the roll gap by a stuffing screw.
  • At least one of the rolls is designed as a perforated hollow roll.
  • the compacts formed here during the pressing are advantageously cut to the desired size on the outlet side using a suitable device, for example a knife or scraper.
  • rollers are profiled.
  • the starting material can then be pressed directly either into granules or into a coherent product band, a so-called Schülpe.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Silicon Compounds (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
  • Colloid Chemistry (AREA)

Abstract

L'invention concerne un procédé de compactage de particules d'aérogel dans lequel les particules d'aérogel sont introduites dans un dispositif de compression et comprimées.
EP98925497A 1997-05-02 1998-04-29 Procede de compactage d'aerogels Ceased EP0979142A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19718741 1997-05-02
DE19718741A DE19718741A1 (de) 1997-05-02 1997-05-02 Verfahren zur Kompaktierung von Aerogelen
PCT/EP1998/002520 WO1998050145A1 (fr) 1997-05-02 1998-04-29 Procede de compactage d'aerogels

Publications (1)

Publication Number Publication Date
EP0979142A1 true EP0979142A1 (fr) 2000-02-16

Family

ID=7828545

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98925497A Ceased EP0979142A1 (fr) 1997-05-02 1998-04-29 Procede de compactage d'aerogels

Country Status (8)

Country Link
US (1) US6620355B1 (fr)
EP (1) EP0979142A1 (fr)
JP (1) JP2001525721A (fr)
KR (1) KR20010012152A (fr)
CN (2) CN1258231A (fr)
CA (1) CA2287832A1 (fr)
DE (1) DE19718741A1 (fr)
WO (1) WO1998050145A1 (fr)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19648798C2 (de) * 1996-11-26 1998-11-19 Hoechst Ag Verfahren zur Herstellung von organisch modifizierten Aerogelen durch Oberflächenmodifikation des wäßrigen Gels (ohne vorherigen Lösungsmitteltausch) und anschließender Trocknung
US7118801B2 (en) * 2003-11-10 2006-10-10 Gore Enterprise Holdings, Inc. Aerogel/PTFE composite insulating material
US9469739B2 (en) 2005-04-07 2016-10-18 Aspen Aerogels, Inc. Microporous polyolefin-based aerogels
US8461223B2 (en) 2005-04-07 2013-06-11 Aspen Aerogels, Inc. Microporous polycyclopentadiene-based aerogels
US9476123B2 (en) 2005-05-31 2016-10-25 Aspen Aerogels, Inc. Solvent management methods for gel production
CN1317233C (zh) * 2005-07-06 2007-05-23 北京科技大学 一种采用凝胶注模法成型硅石气凝胶粉体的方法
US20070014979A1 (en) 2005-07-15 2007-01-18 Aspen Aerogels, Inc. Secured Aerogel Composites and Methods of Manufacture Thereof
US9181486B2 (en) 2006-05-25 2015-11-10 Aspen Aerogels, Inc. Aerogel compositions with enhanced performance
WO2007146945A2 (fr) * 2006-06-12 2007-12-21 Aspen Aerogels, Inc. Composites d'aérogel et de mousse
KR101091860B1 (ko) * 2006-10-10 2011-12-12 한국생산기술연구원 영구적 소수성을 갖는 에어로겔의 제조 방법 및 이로부터 제조된 영구적 소수성을 갖는 에어로겔
US7794805B2 (en) * 2007-06-29 2010-09-14 Schlumberger Technology Corporation Thermal insulation barriers
WO2009020615A1 (fr) * 2007-08-07 2009-02-12 Hunter Douglas Inc. Panneau de verre isolé translucide
US8952119B2 (en) 2010-11-18 2015-02-10 Aspen Aerogels, Inc. Organically modified hybrid aerogels
US8906973B2 (en) 2010-11-30 2014-12-09 Aspen Aerogels, Inc. Modified hybrid silica aerogels
US9133280B2 (en) 2011-06-30 2015-09-15 Aspen Aerogels, Inc. Sulfur-containing organic-inorganic hybrid gel compositions and aerogels
SI24001A (sl) 2012-02-10 2013-08-30 Aerogel Card D.O.O. Kriogena naprava za transport in skladiščenje utekočinjenih plinov
US9302247B2 (en) 2012-04-28 2016-04-05 Aspen Aerogels, Inc. Aerogel sorbents
US11053369B2 (en) 2012-08-10 2021-07-06 Aspen Aerogels, Inc. Segmented flexible gel composites and rigid panels manufactured therefrom
US9593206B2 (en) 2013-03-08 2017-03-14 Aspen Aerogels, Inc. Aerogel insulation panels and manufacturing thereof
FR3007025B1 (fr) 2013-06-14 2015-06-19 Enersens Materiaux composites isolants comprenant un aerogel inorganique et une mousse de melamine
US9434831B2 (en) 2013-11-04 2016-09-06 Aspen Aerogels, Inc. Benzimidazole based aerogel materials
US11380953B2 (en) 2014-06-23 2022-07-05 Aspen Aerogels, Inc. Thin aerogel materials
JP6487542B2 (ja) 2014-10-03 2019-03-20 アスペン エアロゲルズ，インコーポレイティド 改善された疎水性エアロゲル材料
DE102015207944A1 (de) 2015-04-29 2016-11-03 Wacker Chemie Ag Verfahren zur Herstellung organisch modifizierter Aerogele
DE102015207939A1 (de) 2015-04-29 2016-11-03 Wacker Chemie Ag Verfahren zur Herstellung organisch modifizierter Aerogele
DE102015211812A1 (de) 2015-06-25 2016-12-29 Wacker Chemie Ag Wirtschaftliches Verfahren zur Herstellung von organisch modifizierten Lyo- oder Aerogelen
SG11202011338TA (en) 2018-05-31 2020-12-30 Aspen Aerogels Inc Fire-class reinforced aerogel compositions
CN108905912B (zh) * 2018-08-01 2020-10-30 纳诺科技有限公司 气凝胶复合材料的制备方法
EP4382498A1 (fr) 2022-12-09 2024-06-12 EMPA Eidgenössische Materialprüfungs- und Forschungsanstalt Materiau en aerogel de silice en vrac exempt de liant, procede de production et utilisations
WO2023148082A1 (fr) 2022-02-03 2023-08-10 Empa Eidgenössische Materialprüfungs- Und Forschungsanstalt Matériau d'aérogel de silice en vrac exempt de liant, son procédé de production et ses utilisations

Family Cites Families (78)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE296898C (fr)
DE261581C (de) 1912-01-17 1913-06-25 Krupp Ag Aufschlagzünder mit ein- und ausschaltbarer Verzögerung
US2093454A (en) 1934-10-01 1937-09-21 Samuel S Kistler Method of producing aerogels
US2385217A (en) 1942-10-09 1945-09-18 Socony Vacuum Oil Co Inc Gel pellets
GB607234A (en) 1946-01-15 1948-08-27 Standard Oil Dev Co Improved process for the preparation of gel particles
NL74665C (fr) 1949-04-07
GB682574A (en) 1950-05-04 1952-11-12 Dow Corning Ltd Improvements in or relating to silica compositions
US2680696A (en) 1951-02-14 1954-06-08 Du Pont Method of esterifying the surface of a silica substrate having a reactive silanol surface
US2786042A (en) 1951-11-23 1957-03-19 Du Pont Process for preparing sols of colloidal particles of reacted amorphous silica and products thereof
US2886460A (en) 1954-09-14 1959-05-12 Du Pont Organophilic and hydrophilic composition
GB783868A (en) 1954-10-06 1957-10-02 Midland Silicones Ltd A process of preparing hydrophobic organo-silicon powders
US3015645A (en) 1954-10-06 1962-01-02 Dow Corning Silica powders
US2978298A (en) 1956-09-04 1961-04-04 Gen Electric Process for producing hydrophobic aerogels
US3122520A (en) 1959-10-05 1964-02-25 Dow Corning Method of making silicone rubber fillers
US3024126A (en) 1960-06-15 1962-03-06 Dow Corning Method of treating reinforcing silica
DE1667078B2 (de) 1967-10-31 1979-07-19 W.R. Grace & Co., New York, N.Y. (V.St.A.) Verfahren zur Herstellung von kugelförmigen Kieselsäurehydrogelen
SE319161B (fr) 1968-01-30 1970-01-12 Fosfatbolaget Ab
US3794713A (en) 1968-08-06 1974-02-26 Nat Petro Chem Preparation of silica gels
DE2103243C3 (de) 1971-01-25 1979-01-11 Basf Ag, 6700 Ludwigshafen Verfahren und Vorrichtung zur Herstellung von weitgehend kugelförmigen, Kieselsäure enthaltenden Hydrogelen
US4101443A (en) 1976-06-01 1978-07-18 Union Carbide Corporation Transient antifoam compositions
US4101442A (en) 1976-06-01 1978-07-18 Union Carbide Corporation Non-aqueous antifoam compositions
US4190457A (en) 1978-06-09 1980-02-26 Phillips Petroleum Co. Preparation of inorganic xerogels
CS208879B1 (en) 1979-07-09 1981-10-30 Ivan Novak Preparation method of silicic acid xerogel with high volumen of pores
DE2951577A1 (de) 1979-12-21 1981-07-02 Grünzweig + Hartmann und Glasfaser AG, 6700 Ludwigshafen Verfahren zur herstellung von waermeisolierkoerpern sowie vorrichtung zur durchfuehrung des verfahrens
US4256682A (en) * 1980-03-05 1981-03-17 W. R. Grace & Co. Method of preparing silica gel pellets
US4344800A (en) 1980-06-03 1982-08-17 Dow Corning Corporation Method for producing hydrophobic reinforcing silica fillers and fillers obtained thereby
DE3329016A1 (de) 1983-08-11 1985-02-28 Basf Ag, 6700 Ludwigshafen Verfahren zum herstellen von polymerisaten des ethylens mittels eines kieselsaeure-xerogel/chromtrioxid-katalysators
DE3429671A1 (de) 1984-08-11 1986-02-20 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von aerogelen
JPS6169867A (ja) 1984-09-13 1986-04-10 Mitsubishi Rayon Co Ltd シリカ微粒子含有樹脂組成物
US4649037A (en) 1985-03-29 1987-03-10 Allied Corporation Spray-dried inorganic oxides from non-aqueous gels or solutions
FR2584698B1 (fr) 1985-07-15 1990-05-18 Rhone Poulenc Spec Chim Procede de preparation de particules de silice spheroidales
US5215733A (en) 1986-04-25 1993-06-01 Unilever Patent Holdings B.V. Manufacture of silica gels using shear to reduce the particle size prior to washing with a hydrocyclone
US4888369A (en) 1987-01-21 1989-12-19 Himont Incorporated Polypropylene composition resistant to high energy radiation, and radiation sterilized articles therefrom
FR2613708B1 (fr) 1987-04-13 1990-10-12 Rhone Poulenc Chimie Silice de precipitation hydrophobe, son procede de preparation et son application au renforcement des elastomeres silicones
US5001183A (en) 1987-09-10 1991-03-19 Dow Corning Corporation Method of hydrophobing silica
US4950502A (en) 1987-09-10 1990-08-21 Dow Corning Corporation Method of hydrophobing silica
US4873218A (en) 1988-05-26 1989-10-10 The United States Department Of Energy Low density, resorcinol-formaldehyde aerogels
JPH02152196A (ja) 1988-12-03 1990-06-12 Osaka Prefecture 分散型ｅｌ素子
DE3914850A1 (de) 1989-05-05 1990-11-08 Basf Ag Thermisches isoliermaterial auf der basis von pigmenthaltigen kieselsaeureaerogelen
DE69128073T2 (de) 1990-08-23 1998-02-26 Univ California As Represented Verfahren zur herstellung von metalloxidaerogelen mit dichte weniger als 0,02 g/cm3
US5409683A (en) 1990-08-23 1995-04-25 Regents Of The University Of California Method for producing metal oxide aerogels
JP2646150B2 (ja) 1990-08-27 1997-08-25 出光興産 株式会社 撥水性シリカゾルおよびその製造方法
US5674962A (en) 1990-11-30 1997-10-07 Mitsubishi Rayon Company Ltd. Toner resin
US5081163A (en) 1991-04-11 1992-01-14 The United States Of America As Represented By The Department Of Energy Melamine-formaldehyde aerogels
NO912006D0 (no) 1991-05-24 1991-05-24 Sinvent As Fremgangsmaate for fremstilling av et silika-aerogel-lignende materiale.
DE4201306A1 (de) * 1992-01-20 1993-07-22 Basf Ag Formteile oder platten aus silica-aerogelen
US5565142A (en) 1992-04-01 1996-10-15 Deshpande; Ravindra Preparation of high porosity xerogels by chemical surface modification.
DE4231749A1 (de) 1992-09-23 1994-03-24 Basf Ag Verfahren zur Herstellung eines Trägerkatalysators für die Polymerisation von alpha-Olefinen
US5420168A (en) 1993-04-01 1995-05-30 The Regents Of The University Of California Method of low pressure and/or evaporative drying of aerogel
DE4316540A1 (de) 1993-05-18 1994-11-24 Hoechst Ag Verfahren zur unterkritischen Trocknung von Aerogelen
US5508341A (en) 1993-07-08 1996-04-16 Regents Of The University Of California Organic aerogel microspheres and fabrication method therefor
PT710262E (pt) 1993-07-22 2000-09-29 Huntsman Ici Chem Llc Aerogeis organicos
US5484818A (en) 1993-07-22 1996-01-16 Imperial Chemical Industries Plc Organic aerogels
WO1995006617A1 (fr) 1993-08-31 1995-03-09 Basf Aktiengesellschaft Aerogels hydrophobes d'acide silicique
JP2725573B2 (ja) 1993-11-12 1998-03-11 松下電工株式会社 疎水性エアロゲルの製法
US5795556A (en) 1993-12-14 1998-08-18 Hoechst Ag Xerogels and process for their preparation
DE4342548A1 (de) 1993-12-14 1995-06-22 Hoechst Ag Xerogele, Verfahren zu ihrer Herstellung, sowie ihre Verwendung
DE4404701A1 (de) 1994-02-15 1995-08-17 Hoechst Ag Verbundschaumstoffe, Verfahren zu ihrer Herstellung und ihre Verwendung
US5494858A (en) 1994-06-07 1996-02-27 Texas Instruments Incorporated Method for forming porous composites as a low dielectric constant layer with varying porosity distribution electronics applications
DE4430669A1 (de) 1994-08-29 1996-03-07 Hoechst Ag Verfahren zur Herstellung von faserverstärkten Xerogelen, sowie ihre Verwendung
US5476878A (en) 1994-09-16 1995-12-19 Regents Of The University Of California Organic aerogels from the sol-gel polymerization of phenolic-furfural mixtures
DE4437424A1 (de) 1994-10-20 1996-04-25 Hoechst Ag Aerogelhaltige Zusammensetzung, Verfahren zu ihrer Herstellung sowie ihre Verwendung
DE4439217A1 (de) 1994-11-03 1996-05-09 Hoechst Ag Verfahren zur Herstellung von Aerogelen
DE4441567A1 (de) 1994-11-23 1996-05-30 Hoechst Ag Aerogelhaltiges Verbundmaterial, Verfahren zu seiner Herstellung sowie seine Verwendung
WO1996019607A1 (fr) 1994-12-21 1996-06-27 Hoechst Aktiengesellschaft Materiau composite non-tisse-aerogel contenant des fibres a deux composants, son procede de fabrication et son utilisation
DE19502453C1 (de) 1995-01-27 1996-09-05 Hoechst Ag Verfahren zur Herstellung von modifizierten Si0¶2¶- Aerogelen und deren Verwendung
DE19506141A1 (de) 1995-02-22 1996-08-29 Hoechst Ag Verwendung von Aerogelen in der Pharmazie, in der Kosmetik und im Pflanzenschutz
DE19533564A1 (de) * 1995-09-11 1997-03-13 Hoechst Ag Faserhaltiges Aerogel-Verbundmaterial
DE19534198A1 (de) 1995-09-15 1997-03-20 Hoechst Ag Verfahren zur Herstellung organofunktionalisierter Aerogele
DE19537821A1 (de) 1995-10-11 1997-04-17 Hoechst Ag Aerogelbeschichtete Folie
US5595593A (en) 1995-10-12 1997-01-21 Dow Corning Corporation Treatment of fillers with oxa-silacycloalkanes
DE19541279A1 (de) 1995-11-06 1997-05-07 Hoechst Ag Verfahren zur Herstellung von organisch modifizierten Aerogelen unter Verwendung von Alkoholen
DE19541715A1 (de) 1995-11-09 1997-05-15 Hoechst Ag Verfahren zur Herstellung von organisch modifizierten Aerogelen, bei dem die gebildeten Salze ausgefällt werden
DE19541992A1 (de) 1995-11-10 1997-05-15 Hoechst Ag Verfahren zur Herstellung von organisch modifizierten Aerogelen unter Verwendung von Alkoholen, bei dem gebildeten Salze ausgefällt werden
US5731360A (en) * 1996-03-05 1998-03-24 Regents Of The University Of California Compression molding of aerogel microspheres
DE19648798C2 (de) 1996-11-26 1998-11-19 Hoechst Ag Verfahren zur Herstellung von organisch modifizierten Aerogelen durch Oberflächenmodifikation des wäßrigen Gels (ohne vorherigen Lösungsmitteltausch) und anschließender Trocknung
US5750610A (en) 1997-02-24 1998-05-12 Dow Corning Corporation Hydrophobic organosilicate-modified silica gels
US5708069A (en) 1997-02-24 1998-01-13 Dow Corning Corporation Method for making hydrophobic silica gels under neutral conditions

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9850145A1 *

Also Published As

Publication number Publication date
KR20010012152A (ko) 2001-02-15
DE19718741A1 (de) 1998-11-05
JP2001525721A (ja) 2001-12-11
WO1998050145A1 (fr) 1998-11-12
US6620355B1 (en) 2003-09-16
CA2287832A1 (fr) 1998-11-12
CN101015781A (zh) 2007-08-15
CN1258231A (zh) 2000-06-28

Similar Documents

Publication Publication Date Title
WO1998050145A1 (fr) Procede de compactage d'aerogels
EP0979141A1 (fr) Procede de granulation d'aerogels
WO2016124680A1 (fr) Procédé de production d'un matériau aérogel
DE2317455A1 (de) Chromatographisches fuellmaterial
DE69811948T2 (de) Verfahren zur unterkritischen trocknung vonlyo-gelen zur herstellung von aerogelen
EP0044051B1 (fr) Polymère sous forme d'une poudre poreuse
EP0807669B1 (fr) Granulé à base de noir de carbone
DE102020131638A1 (de) Verfahren zur Zerkleinerung von Düngemittelschülpen in einer Zweiwalzenmühle
DE2747204A1 (de) Verfahren zum verbessern der verarbeitungseigenschaften von pulverfoermigen polyolefinen
WO2009003979A1 (fr) Procédé de fabrication d'un solide versable et stable à l'entreposage, contenant essentiellement de l'acide αlpha-alanine-n,n-diacétique et/ou un ou plusieurs dérivés de l'acide αlpha-alanine-n,n-diacétique
DE4345168A1 (de) Ruß-Granulate
EP0984828B1 (fr) Procede de production de logels et d'aerogels se presentant sensiblement sous la forme de billes
EP0100751B1 (fr) Procédé de déshydratation
EP0984829B1 (fr) Procede de production de lyogels et d'aerogels se presentant sensiblement sous la forme de billes
DE102005004893B4 (de) Verfahren zur Formgebung von Celluloseethern
DE102019125358A1 (de) Verfahren zur Herstellung eines Verbundwerkstoffs
EP0951389A1 (fr) Corps moules calorifuges pourvus d'un enrobage et leur procede de production
DE3222865A1 (de) Verfahren zum granulieren von chemiegips und vorrichtung zur durchfuehrung des verfahrens
EP0184605A2 (fr) Procédé pour la production de corps moulés poreux riches en acide de silice et son utilisation
EP1279715A1 (fr) Procédé de liaison des substances non polaires
DE2733004C3 (de) Tonerde-Agglomerate
DE2617366A1 (de) Verfahren zur optimierung der pressleistung von granulierpressen
DE2225452C3 (de) Verfahren zur Herstellung von weitporigem Adsorptionsmittel für Chromatographiezwecke
WO2004035470A2 (fr) Procede de production de peroxydes alcalino-terreux exempts de poussiere
DE69204815T2 (de) Herstellung von Platten aus einem mikroporösen, wärmeisolierenden Material.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19991102

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE ES FR GB IT LI NL SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: CABOT CORPORATION

17Q First examination report despatched

Effective date: 20030704

APBN Date of receipt of notice of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA2E

APAF Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNE

APBT Appeal procedure closed

Free format text: ORIGINAL CODE: EPIDOSNNOA9E

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20070629