公开(公告)号：CS575085A2

公开(公告)日：1991-02-12

申请号：CS575085

申请日：1985-08-07

Applicant: BASF AG

Inventor： GRASER FRITZ DR ,  STANGE ANDREAS DR

IPC: A23J3/06 ,  A23L17/60 ,  B01D11/02 ,  B01J13/00 ,  B01J37/00 ,  C01B33/14 ,  C01B33/158 ,  C01B33/32 ,  C01B39/06

Abstract: A process for the drying of inorganic hydrogels obtained from readily hydrolyzable compounds of the elements Al, Si, Ti, B, La, Zr, Cr, Sn, Th or Mg, and organic hydrogels based on gelatine, albumin or agar agar, from CO2, to give aerogels is easy to carry out industrially, and drying can be effected at from room temperature to 90 DEG C. The resulting aerogels are transparent and have a low bulk density and low thermal conductivity. The aerogels can be used as packing materials for liquid chromatography, as catalyst carriers, as substrates for enzymes and as adsorbents.

公开(公告)号：DE3909007A1

公开(公告)日：1990-09-27

申请号：DE3909007

申请日：1989-03-18

Applicant: BASF AG

Inventor： FLORY KLAUS DR ,  EISELE WOLFGANG DR ,  STANGE ANDREAS DR

IPC: C08G12/04 ,  C08G12/12 ,  C08G12/14 ,  C08G12/38 ,  D21H17/49 ,  D21H17/51 ,  D21H19/24

Abstract: Cationic urea-formaldehyde condensates, which may be obtained by (a) the conversion of urea with alkanol amines in the mol ratio 1 to 6:1 at temperatures of 130 to 180 DEG C with separation of ammonia; (b) the methylolisation of the conversion products obtained in step (a) in an aqueous medium in the basic pH range with formaldehyde; (c) the condensation of the methylolisation products in an aqueous medium at a pH of 0 to 6, the condensation reaction being stopped by setting the pH to between 6.2 and 8 and, where necessary, diluting the reaction mixture with water; a process for manufacturing the condensates, and their use as stiffening agents in papermaking.

公开(公告)号：DE3724646A1

公开(公告)日：1989-02-02

申请号：DE3724646

申请日：1987-07-25

Applicant: BASF AG

Inventor： STANGE ANDREAS DR ,  DEGEN HANS-JUERGEN DR ,  AUHORN WERNER ,  WEBERNDOERFER VOLKMAR DR ,  KROENER MICHAEL DR ,  HARTMANN HEINRICH DR

IPC: D21H17/34 ,  D21H17/28 ,  D21H17/45 ,  D21H21/18

Abstract: In the process, an agent which confers dry strength and can be obtained by mixing enzymatically degraded starch having a viscosity of 20 to 2,000 m Pa.s (determined on a 7.5% strength solution in water at 45 DEG C) with cationic polymers which contain, in copolymerised form,… a) diallyldimethylammonium chloride… b) N-vinylamine or… c) optionally substituted N-vinylimidazolines as characteristic monomers, the K-value of the cationic polymers being at least 30, is added to the paper stock and the stock is dewartered, during sheet formation.

公开(公告)号：DE3413418A1

公开(公告)日：1985-10-17

申请号：DE3413418

申请日：1984-04-10

Applicant: BASF AG

Inventor： GRASER FRITZ DR ,  IDEN RUEDIGER DR ,  SEYBOLD GUENTHER DR ,  STANGE ANDREAS DR ,  WAGENBLAST GERHARD DR

IPC: C09B3/14 ,  C09B3/22 ,  C09B5/00 ,  C09B5/02 ,  C09B5/62 ,  H01S3/213 ,  H01S3/20 ,  C09B3/78

Abstract: A dye laser which as dye contains at least one dye from the substituted violanthrene-5,10-dione, substituted isoviolanthrene-9,18-dione or substituted perylene series. On account of the high fluorescence quantum yield and the high light and heat resistance, the dyes are suitable for use in dye lasers.

公开(公告)号：DE3321738A1

公开(公告)日：1984-12-20

申请号：DE3321738

申请日：1983-06-16

Applicant: BASF AG

Inventor： HELLWIG KARL-RUEDIGER ,  IDEN RUEDIGER DR ,  SCHARFENBERGER WERNER ,  SEYBOLD GUENTHER DR ,  STANGE ANDREAS DR

IPC: G09F13/04 ,  G09F13/20 ,  G02F2/02 ,  C09K11/06 ,  F21S5/00

Abstract: Optical display elements which are controlled by light and consist of a combination of one or more transparent pellucid materials dyed in a fluorescing fashion. The pellucid material is structured entirely or partly so as to cause the emission of light at these points.