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    Water-Soluble Derivatives of Polyalkylenimines and their production
    2.
    发明专利
    Water-Soluble Derivatives of Polyalkylenimines and their production 未知

    公开(公告)号：GB1156516A

    公开(公告)日：1969-06-25

    申请号：GB3906266

    申请日：1966-09-01

    Applicant: BASF AG

    Inventor： BAUER ERNST ,  ARNOLD JOHANNES ,  SOENKSEN UWE ,  SANNE WALTER

    IPC: C08G73/02 ,  C08G73/04 ,  D21H17/56

    Abstract: 1,156,516. Water-soluble polyalkylenimine derivatives. BADISCHE ANILIN- & SODAFABRIK A.G. 1 Sept., 1966 [2 Sept., 1965], No. 39062/66. Heading C3R. [Also in Division D2] Water-soluble polyalkylenimine derivatives are prepared by reaction of polyalkylenimines with bifunctional alkylating agents wherein a polyalkylenimine which in the form of a 1% by weight aqueous solution has a viscosity of 1À03 to 1À6 centistokes at 25‹ C. is reacted with 0À5 to 25% by weight of epichlorohydrin (or the equivalent molar amount of another bifunctional alkylating agent having 2 to 4 carbon atoms in the molecule) at from 20‹ to 150‹ C. to such an extent that the reaction product, in the form of a 1% by weight aqueous solution, has a viscosity of 1À6 to 20 centistokes at 25‹ C. Examples of suitable bifunctional alkylating agents are epichlorohydrin, ethylene chloride, 1,3-dichloropropane, 1,4-dichlorobutane, dichlorohydrin and 1,2-3,4-diepoxybutane. Polyethylenimine is particularly suitable as the polyalkylenimine; other suitable examples being copolymers of 40 to 80% by weight of ethylenimine and 20 to 60% by weight of 1,2-propylenimine. The resulting polyalkylenimine derivatives are useful as assistants in the paper industry.

    Chemically modified polymers of 1,2-alkylenimines and a process for their production
    7.
    发明专利
    Chemically modified polymers of 1,2-alkylenimines and a process for their production 未知

    公开(公告)号：GB1072088A

    公开(公告)日：1967-06-14

    申请号：GB3575165

    申请日：1965-08-20

    Applicant: BASF AG

    Inventor： SOENKSEN UWE ,  BAUER ERNST ,  SANNE WALTER ,  ARNOLD JOHANNES

    IPC: C08G73/02 ,  C08G73/04

    Abstract: Water-soluble polymers of (a) 1,2-alkylene imines which do not bear any substituents on the nitrogen atom with (b) a ,b -unsaturated carboxylic acids or their acid chlorides, esters or anhydrides, are prepared by reacting 1 mole of (a) in solution in water or in an organic solvent containing water with 0.001 to 0.5 moles of (b) with the viscosity of a 1% by weight aqueous solution of the reaction product is at least 1.2 centipoises at 20 DEG C. The reaction is preferably carried out by placing the bulk of (b) in water or a mixture of water and an organic solvent and then allowing (a) dissolved in water to flow in at 70 DEG to 100 DEG C. or by allowing the reactants to flow simultaneously into the solvent which has been previously heated. The examples describe the reactions of ethylene imine with methyl acrylate and with maleic anhydride.ALSO:Cellulose fibres for use in the paper industry are treated with water-soluble polymers formed by reaching a 1, 2-alkylene imine with an a , b -unsaturated carboxylic acid or its acid chloride, ester or anhydride until the viscocity of a 1% aqueous solution of the reaction product is at least 1.2 centipoises at 20 DEG C. The fibres may be of bleached or unbleached sulphite cellulose. Example 2 describes the treating of unbleached sulphite cellulose fibres with a polymer prepared from ethylene imine and methyl acrylate. The polymers increase the freeness of the pulp and the wet-strength of the paper.

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