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    3.
    发明专利
    未知

    公开(公告)号：DE4007312A1

    公开(公告)日：1991-09-12

    申请号：DE4007312

    申请日：1990-03-08

    Applicant: BASF AG

    Inventor： MOENCH DIETMAR DR ,  KROENER MICHAEL DR ,  FREUDENBERG ENRIQUE DR ,  HARTMANN HEINRICH DR ,  SENDHOFF NORBERT DR

    IPC: C08F2/10 ,  C08F8/12 ,  C08F26/00 ,  C08F26/02

    Abstract: N-vinylformamide is polymerized with or without other water-soluble monoethylenically unsaturated monomers and with or without water-insoluble monoethylenically unsaturated monomers in not less than 30% strength by weight aqueous monomer solutions in the presence of a polymerization initiator at not more than 150 degrees C. in a kneader by a method in which the polymerization is carried out to such an extent that the initially formed water-containing polymer gel disintegrates into fine particles and the finely divided polymer obtainable in this manner is hydrolyzed, preferably in the kneader, so that not less than 0.1 mol % of the N-vinylformamide units present in the polymer are converted into vinylamine units. The polymers obtainable in this manner dissolve readily in water. The aqueous solutions are used, for example, in papermaking and tertiary oil production.

    4.
    发明专利
    未知

    公开(公告)号：ES2051973T3

    公开(公告)日：1994-07-01

    申请号：ES89122748

    申请日：1989-12-09

    Applicant: BASF AG

    Inventor： HARTMANN HEINRICH DR ,  DENZINGER WALTER ,  KROENER MICHAEL DR ,  SENDHOFF NORBERT DR ,  FREUDENBERG ENRIQUE DR

    IPC: C08F2/32 ,  C08F8/12 ,  C08F26/00 ,  C08F26/02 ,  C09K23/42 ,  D21F1/66 ,  D21H17/34

    Abstract: Process for preparing stable water-in-oil emulsions of hydrolysed polymers of N-vinylamides of the formula in which R and R denote H or C1-C6-alkyl, by polymerising compounds of the formula I, alone or mixed with other monoethylenically unsaturated monomers, in the form of water-in-oil emulsions to give water-in-oil polymer emulsions, and subsequently hydrolysing the polymers, the hydrolysis of the polymers in the form of water-in-oil polymer emulsions being carried out in the presence of acids or bases and from 1 to 30% by weight, based on the polymers, of emulsifiers which are obtainable by reacting (A) C10- to C22-fatty alcohols with epichlorohydrin in the molar ratio 1:0.5 to 1:1.5 to give glycidyl ethers, (B) reacting the glycidyl ethers with (1) saturated C2- to C6-alcohols containing 2 to 6 OH groups or (2) monoethers thereof with C10- to C22-fatty alcohols, in the glycidyl ether:(1) or (2) molar ratio of from 1:0.5 to 6, in the presence of acids or bases, and (C) alkoxylating the reaction products from (B) using at least one C2- to C4-alkylene oxide in the molar ratio 1:1 to 6. The polymer emulsions obtainable in this way are used as dewatering, retention and flocculating agents in the production of paper and paper products.

    5.
    发明专利
    未知

    公开(公告)号：DE58907576D1

    公开(公告)日：1994-06-01

    申请号：DE58907576

    申请日：1989-12-09

    Applicant: BASF AG

    Inventor： HARTMANN HEINRICH DR ,  DENZINGER WALTER ,  KROENER MICHAEL DR ,  SENDHOFF NORBERT DR ,  FREUDENBERG ENRIQUE DR

    IPC: C08F2/32 ,  C08F8/12 ,  C08F26/00 ,  C08F26/02 ,  C09K23/42 ,  D21F1/66 ,  D21H17/34

    Abstract: Process for preparing stable water-in-oil emulsions of hydrolysed polymers of N-vinylamides of the formula in which R and R denote H or C1-C6-alkyl, by polymerising compounds of the formula I, alone or mixed with other monoethylenically unsaturated monomers, in the form of water-in-oil emulsions to give water-in-oil polymer emulsions, and subsequently hydrolysing the polymers, the hydrolysis of the polymers in the form of water-in-oil polymer emulsions being carried out in the presence of acids or bases and from 1 to 30% by weight, based on the polymers, of emulsifiers which are obtainable by reacting (A) C10- to C22-fatty alcohols with epichlorohydrin in the molar ratio 1:0.5 to 1:1.5 to give glycidyl ethers, (B) reacting the glycidyl ethers with (1) saturated C2- to C6-alcohols containing 2 to 6 OH groups or (2) monoethers thereof with C10- to C22-fatty alcohols, in the glycidyl ether:(1) or (2) molar ratio of from 1:0.5 to 6, in the presence of acids or bases, and (C) alkoxylating the reaction products from (B) using at least one C2- to C4-alkylene oxide in the molar ratio 1:1 to 6. The polymer emulsions obtainable in this way are used as dewatering, retention and flocculating agents in the production of paper and paper products.

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