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    Chemically modified polymers of 1,2-alkylenimines and a process for their production
    13.
    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.

    Solutions of water-soluble condensation products and a process for the production thereof
    15.
    发明专利
    Solutions of water-soluble condensation products and a process for the production thereof 未知

    公开(公告)号：GB1065114A

    公开(公告)日：1967-04-12

    申请号：GB2710864

    申请日：1964-07-01

    Applicant: BASF AG

    Inventor： SOENKSEN UWE

    IPC: C02F1/52 ,  C02F1/54 ,  C08G59/50 ,  C08G73/02 ,  C08G73/04

    Abstract: Solutions, for use as flocculants, comprise (1) water soluble products of (a) 3 to 100 moles of an alkylene imine, and (b) 1 mole of a hydrocarbon which is substituted by at least 2 reactive groups which are epoxy groups or halogen atoms situated in an a -position to a hydroxy or epoxy group, and (2) a completely water miscible organic solvent, water, or a mixture thereof.ALSO:A solution containing at least 2% by wt. of a water-soluble condensation product is prepared by condensing (i) 3 to 100 moles of an imine of general formula wherein R1, R2 and R3 are each hydrogen or C1- 6 alkyl, and (ii) 1 mole of hydrocarbon compound which is substituted by at least 2 reactive groups which are epoxy groups, or halogen atoms situated in an a -position to a hydroxyl or epoxy group, in water, a completely water-miscible organic solvent or a mixture thereof. Suitable compounds (ii) are di-and tri-epoxides, halo-alkyl epoxides and di-halo alkanols, many are specified. Specified solvents are water, acetone, alcohols, dimethyl formamide and dioxane. The reaction with polyepoxides or halo-alkyl epoxides may be carried in the presence of equivalent amounts of aqueous hydrogen halide, or mineral acid, since the halo-alcohols formed initially react more rapidly with the amine. The examples describe the preparation of solutions of the condensates of (1)-(3), (6) and (8)-(11) ethylene imine and epichlorohydrin, the reactions in (6) and (11) being effected in the presence of concentrated hydrochloric and hydroiodic acids respectively; (4) C-methyl-ethylene imine and epichlorohydrin; (5) dichlorohydrin and ethylene-imine; and (7) ethyleneimine and the product obtained by hydrolysing 1 mole of dimethyl-di-[(p-2,3-epoxypropyl)-phenyl]-methane, with 1 mole of hydrochloric acid.

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