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    Use of alkanolamine ester(s) of boric acid - in deliming in leather prodn. reducing evolution of hydrogen sulphide
    72.
    发明专利
    Use of alkanolamine ester(s) of boric acid - in deliming in leather prodn. reducing evolution of hydrogen sulphide 未知

    公开(公告)号：DE4215389A1

    公开(公告)日：1993-11-18

    申请号：DE4215389

    申请日：1992-05-11

    Applicant: BASF AG

    Inventor： BIRKHOFER HERMANN DR ,  WEGNER BRIGITTE DR ,  OPPENLAENDER KNUT DR ,  GUENTHER WOLFGANG DR ,  MOHR JUERGEN DR

    IPC: C14C1/08 ,  C07F5/04

    Abstract: Boric acid alkanolamine esters of formula B(OR)3 are used for deliming in leather prodn. R = H or gp. of formula (alkylene-O)n-(C(R1)H)m-NR2R3, or 2 R gps. together form gp. of formula (alkylene1)2 N-R3, or 3 R gps. together form gp. of formula -(alkylene1)3-N and at least 1 R is not H; alkylene is 2-6C; alkylene1 is 2-3C; R1 = H, Me or Et; R2 = H, 1-4C alkyl or Ph; R3 = H or 1-4C alkyl; n = 0-6; m = 2-10. ADVANTAGE - Evolution of H2S during deliming is limited. In an example, (A) a mixt. of 149g of tiethanolamine and 62g of orthoboric acid was heated at 80-83 deg. C, with removal of water at 25 mbars. The yield of triester was almost quantitative. (B) 100 pts. of steeped, delimed oxhide was soaked in a 50% bath contg 2% of the ester from (A), at 30 deg. C. After 30 mins., the pH was 8.9 and the H2S concn. was 140 ppm. After a further 60 mins., the hide was delimed, the H2S concn. was O and the pH was 9.2. The hides were clean and bright. Further treatment gave a soft, evenly dyed leather with very fine grain.

    New N-phosphono-methyl-polyacrylamide derivs. - useful as detergent additives and water treatment agents, with builder, complexing, bleach stabilising and scale inhibiting activities
    76.
    发明专利
    New N-phosphono-methyl-polyacrylamide derivs. - useful as detergent additives and water treatment agents, with builder, complexing, bleach stabilising and scale inhibiting activities 未知

    公开(公告)号：DE4128510A1

    公开(公告)日：1993-03-04

    申请号：DE4128510

    申请日：1991-08-28

    Applicant: BASF AG

    Inventor： MOHR JUERGEN DR ,  OPPENLAENDER KNUT DR ,  DENZINGER WALTER ,  BAUR RICHARD DR ,  HARTMANN HEINRICH DR

    IPC: C08F8/40

    Abstract: Phosphonomethylated polyacrylamides (A) contg. units of formula (I) are new. In (I), R1 = H, 1-6C alkyl or -CH2-P(O)(OX)2, R2 = H or 1-6C alkyl, X = H, alkali metal, NH4 or alkaline earth metal equiv. (A) are pref. made from polyacrylamides contg. units of formula (II) by reaction with HCHO and H3PO3. In (II) R and R1a = H or 1-6C alkyl. The starting polymers are esp. derived from acrylamide but homopolymer of (or copolymer including) methacrylamide or N-methylacrylamide may also be used. Opt. other comonomers are included such as vinyl acetate, acrylic or maleic acids or, as crosslinking agents, cpds. with at least 2 ethylenic double bonds, e.g. methylene-bis-acrylamide. USE - (A) are useful as washing compsn. additives (at 0.5-20 wt.% of the compsn.). They act simultaneously as builders, complexing agents, bleach stabilisers and inhibitors of hardness deposition. When formulated with other additives such as greying inhibitors, clay dispersants etc., (A) show a synergistic effect. (A) can also be used to inhibit scale deposition in water system at 0.1-100 (0.5-25) ppm. e.g. in power stations, desalination plants and evapn. of sugar juice. (A) are prepd. from readily available starting materials. .

    80.
    发明专利
    未知

    公开(公告)号：DE4026965A1

    公开(公告)日：1992-02-27

    申请号：DE4026965

    申请日：1990-08-25

    Applicant: BASF AG

    Inventor： TER MAAT JOHAN HERMAN HENDRIK ,  OPPENLAENDER KNUT DR ,  STERZEL HANS-JOSEF DR

    IPC: B22F1/00 ,  B22F3/10 ,  C04B35/00 ,  C04B35/632 ,  C04B35/638

    Abstract: Castable moulding materials containing sinterable powders comprise, relative to the total mass, a) 60 to 95% by weight of sinterable powders, (b) 0.1 to 10% by weight of a surfactant - obtainable by alkoxylation of an aliphatic alcohol, a fatty acid, a fatty acid amide, a fatty acid ester or an aliphatic amine, and (c) 2 to 35% by weight of an organic solvent having a melting point of

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