23.
    发明专利
    未知

    公开(公告)号:AT249426T

    公开(公告)日:2003-09-15

    申请号:AT99125660

    申请日:1999-12-22

    Applicant: BASF AG

    Abstract: Preparation of guanidine derivatives (I) comprises reacting O-alkylisourea salts (II) with an amine (III) in the presence of seed crystals of (I). Preparation of guanidine derivatives of formula (I) comprises reacting O-alkylisourea salts of formula (II) with an amine of formula (III) in the presence of seed crystals of (I). R1 = 1-8C alkylene or a divalent 5-10C cycloaliphatic group; R2 = H or 1-8C alkyl; or NR1R2 = 5-6 membered ring substituted by Z; Z = COOR3, SO2OR3 or PO(OR3)(OR4); R3 = H, alkalimetal or an equivalent of an alkaline earth metal; and R4 = as for R3 or 1-6C alkyl; R5 = 1-8C alkyl; X = equivalent of an anion.

    24.
    发明专利
    未知

    公开(公告)号:DE10105030A1

    公开(公告)日:2002-08-08

    申请号:DE10105030

    申请日:2001-02-05

    Applicant: BASF AG

    Abstract: The invention relates to a method for producing N,N'-carbonylbis- epsilon -caprolactam by the single-stage reaction of epsilon -caprolactam with phosgene, optionally in an inert organic solvent, in the presence of an organic nitrogenous base without an acylable nitrogen atom. The invention is characterised in that the organic nitrogenous base has a pKa-value of between 5 and 7. N,N-dimethylaniline is the preferred nitrogenous base.

    25.
    发明专利
    未知

    公开(公告)号:DE10105029A1

    公开(公告)日:2002-08-08

    申请号:DE10105029

    申请日:2001-02-05

    Applicant: BASF AG

    Abstract: The invention relates to a method for producing N,N'carbonylbis- epsilon -caprolactam by reacting epsilon -caprolactam with phosgene in the presence of a hydrogen chloride-binding agent in an inert organic solvent and isolating the reaction product from the product solution. The isolation comprises the following steps: a) optionally distilling off a part of the organic solvent from the product solution; b) adding water to the product solution; c) removing the organic solvent by azeotropic distillation, optionally while replacing the water distilled off, thereby deploying the product solution of organic solvent; d) allowing the N,N'-carbonylbis- epsilon -caprolactam to crystallize from the solution that is deployed from organic solvent, thereby obtaining an aqueous suspension of N,N'-carbonylbis- epsilon -caprolactam; and e) removing the crystallized product.

    POLYELECTROLYTE COMPLEXES AND THEIR PREPARATION

    公开(公告)号:CA2406651A1

    公开(公告)日:2001-11-15

    申请号:CA2406651

    申请日:2001-05-09

    Applicant: BASF AG

    Abstract: The invention relates to polyelectrolyte complexes of cationic and anionic polymers, comprising (a) cationic condensates of (i) at least one amine and (ii) a cross-linking agent from the group of epihalohydrins, or bishalohydri ns of diols, bishalohydrins of polyalkylene glycols, bishalohydrins of polytetrahydrofurans, alkylene dihalides, alkylene trihalides, bis-epoxides, tris-epoxides, tetra-epoxides, and/or mixtures of the above and/or quaternar y cationic condensates of (i) and (ii) and (b) anionic compounds with at last three anionic groups and a loading ratio of anionic to cationic polymers of 0.01 to 20. The invention further relates to methods for the production of t he polyelctrolyte complexes by means of mixing the cationic condensates (a) wit h anionic compounds (b).

Patent Agency Ranking