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    12.
    发明专利
    未知

    公开(公告)号：DE3909004A1

    公开(公告)日：1990-09-27

    申请号：DE3909004

    申请日：1989-03-18

    Applicant: BASF AG

    Inventor： MOENCH DIETMAR DR ,  HARTMANN HEINRICH DR ,  FREUDENBERG ENRIQUE DR ,  STANGE ANDREAS DR

    IPC: D21H17/34 ,  D21H17/45 ,  D21H21/06 ,  D21H21/10

    Abstract: PCT No. PCT/EP90/00406 Sec. 371 Date Dec. 4, 1990 Sec. 102(e) Date Dec. 4, 1990 PCT Filed Mar. 14, 1990 PCT Pub. No. WO90/11404 PCT Pub. Date Oct. 4, 1990.Paper, board and cardboard are produced by draining a paper stock in the presence of a nonhydrolyzed copolymer which contains, as polymerized units, (a) from 99 to 1 mol % of N-vinylformamide and (b) from 1 to 99 mol % of one or more water-soluble basic monomers of the formula (I) or (II) where R1 is H, CH3 or C2H5, R2, R3 and R4 are each H, CH3, C2H5 or (-CH2-CH2-O-)nH, R5 and R6 are each C1-C10-alkyl, A is C1-C6-alkylene, n is from 1 to 6 and Y(-) is an anion, in an amount of from 0.01 to 3.5% by weight, based on dry paper stock.

    13.
    发明专利
    未知

    公开(公告)号：DE3834435A1

    公开(公告)日：1990-06-13

    申请号：DE3834435

    申请日：1988-10-10

    Applicant: BASF AG

    Inventor： MOENCH DIETMAR DR ,  STANGE ANDREAS DR ,  LIEBE JOERG DR ,  HARTMANN HEINRICH DR ,  MERGER FRANZ DR ,  SCHWARTZ MANFRED DR

    IPC: C08C19/00 ,  C08F8/12 ,  C08F8/28 ,  D21H17/37

    Abstract: Bridged, water-soluble copolymers are obtainable by (A) copolymerization of a monomer mixture of (a) from 50 to 99 mol % of acrylamide and/or methacrylamide, (b) from 50 to 1 mol % of a monoethylenically unsaturated monomer containing actual groups and (c) from 0 to 20 mol % of monomers which differ from (a) and (b), in the presence of a polymerization initiator under conditions such that the acetal groups of the monomers (b) undergo virtually no hydrolysis, (B) hydrolysis of the acetal groups of the monomers (b), present as copolymerized units in the copolymers (A), (C) condensation of the copolymers (B) containing aldehyde groups at a pH above 5, at most to a degree such that the resulting condensates are still water-soluble and (D) stopping of the condensation reaction by adding acid until the pH reaches 3 or less, and are used as paper stock additives in papermaking for increasing the wet strength of paper.

    16.
    发明专利
    未知

    公开(公告)号：DE3587868D1

    公开(公告)日：1994-08-04

    申请号：DE3587868

    申请日：1985-08-02

    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.

    17.
    发明专利
    未知

    公开(公告)号：DE3864938D1

    公开(公告)日：1991-10-24

    申请号：DE3864938

    申请日：1988-07-19

    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 prodn. of paper, paperboard and cardboard with high dry strength by adding a dry strength agent (I) to the pulp and dewatering, with sheet formation, the novelty is that (I) is an aq. soln. of mixts. of enzymatically degraded starches (II) with a viscosity of 20-2000 mPa.s (in 7.5% aq. soln. at 45 deg.C) and cationic polymers (III) derived from (a) diallyldimethylammonium chloride (IV), (b) N-vinylamine (V) or (c) N-vinylimidazolines of the formula (VI). R1 = H, 1-18C alkyl or C6H3R5R6; R5 and R6 = H, 1-4C alkyl or Cl; R2 = H, 1-18C alkyl, benzyl or glycidyl; R3 and R4 = H or 1-4C alkyl; X(-) = an acid gp.; which have a Fikentscher K value of min. 30 (In 5% aq. NaCl soln. at 25 deg.C and polymer concn. of 0.5wt.%).

    Thiazolyl cyano-coumarins and their use for the areal concentration of light
    20.
    发明专利
    Thiazolyl cyano-coumarins and their use for the areal concentration of light 未知

    公开(公告)号：DE3609804A1

    公开(公告)日：1987-09-24

    申请号：DE3609804

    申请日：1986-03-22

    Applicant: BASF AG

    Inventor： HAHN ERWIN DR ,  SEYBOLD GUENTHER DR ,  STANGE ANDREAS DR

    IPC: C07D491/052 ,  C08K5/47 ,  C09B57/02 ,  H01S3/213 ,  C07D417/04 ,  C07D491/00 ,  C08K5/46 ,  H01S3/20

    Abstract: The invention relates to coumarin derivatives of the general formula in which B and B are identical or different aliphatic, cycloaliphatic, aromatic or heterocyclic radicals, X is oxygen or imino, Z is hydrogen, C1- to C4-alkyl, C1- to C4-alkyl which is optionally substituted by hydroxyl, cyano, C1- to C4-alkoxy, chlorine, bromine, carboxyl, carbo-C1- to -C4-alkoxy, carboxamido or acetoxy, or is cyclohexyl, benzyl, phenylethyl, phenyl or p-tolyl, Z is hydrogen, C1- to C4-alkyl or C1- to C4-alkyl which is optionally substituted by cyano, C1- to C4-alkoxy, chlorine, bromine, carboxyl, carbo-C1- to -C4-alkoxy, carboxamido or acetoxy, Z and Z , together with the nitrogen, are the radical of a 5- or 6-membered saturated heterocyclic ring, and Z and/or Z may each form a ring with the ortho position (with respect to the N atom). The compounds according to the invention are suitable as fluorescent compounds in plastics, light-collecting systems and as laser dyes.

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