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    Graft polymers of natural substances containing saccharide structures or derivatives thereof and ethylenically unsaturated compounds and their use.
    82.
    发明专利
    Graft polymers of natural substances containing saccharide structures or derivatives thereof and ethylenically unsaturated compounds and their use. 未知

    公开(公告)号：DE4127733A1

    公开(公告)日：1993-02-25

    申请号：DE4127733

    申请日：1991-08-22

    Applicant: BASF AG

    Inventor： HARTMANN HEINRICH ,  DENZINGER WALTER ,  KROENER MICHAEL ,  NILZ CLAUDIA ,  LINHARDT FRIEDRICH ,  STANGE ANDREAS

    IPC: C08F251/02 ,  C08F251/00 ,  D21H17/34 ,  D21H17/35 ,  D21H17/37 ,  D21H21/18

    Abstract: (1) Graft polymers (I) obtainable by polymerisation of (A) monomers or monomer mixts. comprising (A1) 10-100 % (all pts. wt.) N-vinylcarboxylic amides. CH2=CH-N(R2)C(O)R' (1), where R1, R2 = H or 1-6 C alkyl (A2) 0-90 % other monoethylenically unsatd., carboxylic gp.-free monomer copolymerisation with (A1) (A3) 0-5 % monomer with at least 2 ethylenically unsatd., non-conjugated double bonds in mol. in presence of (B) mono-, oligo-, or poly-saccharide; oxidatively, hydrolytically, or enzymatically degraded polysaccharide; oxidatively-hydrolytically or oxidatively-enzymatically degraded polysaccharide; chemically modified mono-, oligo-, or poly-sacchardie, or mixt. of these in ratio (A):(B) = 95-20:5-80 and op. subsequent splitting off of gp. -C(:O)R1 from polymerised monomers (A) of (I) with formation of units -CH2-CNHR2H- are claimed. (2) Also claimed are (I) obtainable by process wherein mixt. of 1-99 % N-vinylformamide (II) and 99-1 % vinyl acetate (III) is used as (A), 2-100 % formyl gps. of polymerised (II) are split off with formation of units -CH2-C(NH2)H- (3) and 2-100 % acetate gps. of polymerisated (III) and split off with formation of units -CH20C(OH)H- (4). USE/ADVANTAGE - Dry- and wet-stength agents in prepn. of paper, carboard, and paperboard, (I), prepd. partly with renewable raw materials, are less expensi

    83.
    发明专利
    未知

    公开(公告)号：NO171173B

    公开(公告)日：1992-10-26

    申请号：NO880856

    申请日：1988-02-26

    Applicant: BASF AG

    Inventor： DEGEN HANS-JUERGEN ,  PFOHL SIGBERG ,  WEBERNDOERFER VOLKMAR ,  REHMER GERD ,  KROENER MICHAEL ,  STANGE ANDREAS

    IPC: D21H17/34 ,  D21H17/28 ,  D21H17/29 ,  D21H17/37 ,  D21H17/45 ,  D21H17/56 ,  D21H21/18 ,  D21H21/10

    Abstract: Paper and paperboard of high dry strength are produced by adding a dry strength enhancer to the paper stock and dewatering the paper stock with sheet formation by using as the dry strength enhancer a mixture of a cationic polymer which contains as characteristic monomers copolymerized units of (a) diallyldimethylammonium chloride, (b) N-vinylamine or (c) a substituted or unsubstituted N-vinylimidazoline and has a K value of not less than 30, and natural potato starch which is converted into a water-soluble form by heating in an aqueous medium at above the gelatinization temperature of natural potato starch in the absence of any oxidizing agents or alkali.

    90.
    发明专利
    未知

    公开(公告)号：DK407888D0

    公开(公告)日：1988-07-21

    申请号：DK407888

    申请日：1988-07-21

    Applicant: BASF AG

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

    IPC: D21H17/34 ,  D21H17/28 ,  D21H17/45 ,  D21H21/18 ,  D21H3/28 ,  D21H3/36

    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.

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