65.
    发明专利
    未知

    公开(公告)号:ES2160322T3

    公开(公告)日:2001-11-01

    申请号:ES97903333

    申请日:1997-02-20

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP97/00801 Sec. 371 Date Aug. 31, 1998 Sec. 102(e) Date Aug. 31, 1998 PCT Filed Feb. 20, 1997 PCT Pub. No. WO97/31518 PCT Pub. Date Sep. 4, 1997Partially hydrolyzed polymers of N-vinylcarboxamides obtainable by sole polymerization of N-vinylcarboxamides of the formula where R1 and R2 are each hydrogen or C1- to C6-alkyl, and elimination from the polymers of from 0.5 to 95 mol % of the groups of the formula where R1 is hydrogen or C1- to C6-alkyl, can be used as paper, paperboard and cardboard dry strength enhancers.

    APPLICATION OF POLYMERS AS BIOCIDES

    公开(公告)号:PL328772A1

    公开(公告)日:1999-02-15

    申请号:PL32877297

    申请日:1997-03-04

    Applicant: BASF AG

    Abstract: The use of polymers (I) as biocides is new, where (I) comprises: (a) 0.1-100 mol. % vinylamine (VA) or ethyleneimine units; (b) 0-99.9 mol.% units derived from at least one monomer selected from N-vinylcarboxamides of formula CH2=CH-N(R1)-CO-R2 (II), vinyl formate, vinyl acetate, vinyl propionate, vinyl alcohol, (1-6C) alkyl-vinyl ethers, monoethylenically unsaturated 3-8C carboxylic acids, or their esters, nitriles, amides and anhydrides, N-vinylurea, N-vinylimidazoles and N-vinylimidazolines; and (c) 0-5 mol.% units derived from monomers with at least two ethylenically unsaturated double bonds. The sum of (a)-(c) is 100 mol.%. R1, R2 = H or 1-6C alkyl.

    70.
    发明专利
    未知

    公开(公告)号:AT174040T

    公开(公告)日:1998-12-15

    申请号:AT95919452

    申请日:1995-05-13

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP95/01818 Sec. 371 Date Nov. 21, 1996 Sec. 102(e) Date Nov. 21, 1996 PCT Filed May 13, 1995 PCT Pub. No. WO95/32227 PCT Pub. Date Nov. 30, 1995A process for the preparation of a stable water-in-oil emulsion of a hydrolyzed polymer of an N-vinyl amide of the formula (I) in which R and R1 denote H or C1-C6 alkyl, by the polymerization of a compound of the formula I alone or in admixture with another ethylenically unsaturated monomer in the presence of a polymerization initiator and emulsifier in the form of a water-in-oil emulsion, to form a water-in-oil polymeric emulsion, followed by hydrolysis of the polymer in the form of the water-in-oil polymeric emulsion in the presence of an acid or base and from 1 to 30 wt %, based on the polymer, of an emulsifier, the emulsifier used being a mixture of (a) from 5 to 95 wt % of a block or graft copolymer of the structure (A-B)m, (A)-B or (B)-A, in which in each case (a) from 5 to 95 wt % of a block or graft copolymer of the structure (A-B)m, (A)nB or (B)nA, in which in each case A is a hydrophobic homopolymer or copolymer having a degree of polymerization of at least 3, B is a hydrophilic homopolymer or copolymer having a degree of polymerization of at least 3, m is equal to or greater than 1, and n is equal to or greater than 2, and (b) from 5 to 95 wt % of another water-in-oil emulsifier having a molar mass below 1000 g/mol.

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