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    41.
    发明专利
    未知

    公开(公告)号：FI951516A

    公开(公告)日：1995-03-30

    申请号：FI951516

    申请日：1995-03-30

    Applicant: BASF AG

    Inventor： NILZ CLAUDIA ,  SENDHOFF NORBERT ,  BREITSCHAFT WALTER ,  ZILLIG MANFRED ,  LORENCAK PRIMOZ

    IPC: D21H17/34 ,  D21H21/28 ,  D21H

    Abstract: PCT No. PCT/EP93/02580 Sec. 371 Date Mar. 15, 1995 Sec. 102(e) Date Mar. 15, 1995 PCT Filed Sep. 23, 1993 PCT Pub. No. WO94/08092 PCT Pub. Date Apr. 14, 1994A process for dyeing paper in connection with paper manufacture by adding water-soluble anionic dyes and cationic polymers which contain vinylamine units to the paper pulp as fixing agents and removing water from the paper pulp with the formation of dyed paper is described.

    42.
    发明专利
    未知

    公开(公告)号：ES2063977T3

    公开(公告)日：1995-01-16

    申请号：ES90912409

    申请日：1990-08-22

    Applicant: BASF AG

    Inventor： FLORY KLAUS ,  STANGE ANDREAS ,  KROENER MICHAEL ,  SENDHOFF NORBERT

    IPC: C08G12/12 ,  C08G12/46 ,  D21H17/49 ,  D21H17/50

    Abstract: Cationic urea/formaldehyde resins are obtainable by condensing urea and formaldehyde in a molar ratio of from 1:1.5 to 1:3 in the presence of polymers which contain not less than 1 mol % of polymerized vinylamine units and have Fikentscher K values of from 5 to 300, in an amount of from 5 to 50 g per mole of urea in the end product, where the mixture is first a) precondensed at a pH of from 8 to 14, then acidified and b) condensed at a pH of from 1 to 5 until gel formation begins, c) then from 0.3 to 1.5 moles of formaldehyde are added per mole of urea used, d) post-condensation is carried out and e) the resin solution is subsequently neutralized. The resins thus obtained are used in papermaking as assistants for increasing the dry and wet strength of paper and result in less dulling of the whiteness of the paper.

    43.
    发明专利
    未知

    公开(公告)号：DE59007652D1

    公开(公告)日：1994-12-08

    申请号：DE59007652

    申请日：1990-08-22

    Applicant: BASF AG

    Inventor： FLORY KLAUS ,  STANGE ANDREAS ,  KROENER MICHAEL ,  SENDHOFF NORBERT

    IPC: C08G12/12 ,  C08G12/46 ,  D21H17/49 ,  D21H17/50

    Abstract: Cationic urea/formaldehyde resins are obtainable by condensing urea and formaldehyde in a molar ratio of from 1:1.5 to 1:3 in the presence of polymers which contain not less than 1 mol % of polymerized vinylamine units and have Fikentscher K values of from 5 to 300, in an amount of from 5 to 50 g per mole of urea in the end product, where the mixture is first a) precondensed at a pH of from 8 to 14, then acidified and b) condensed at a pH of from 1 to 5 until gel formation begins, c) then from 0.3 to 1.5 moles of formaldehyde are added per mole of urea used, d) post-condensation is carried out and e) the resin solution is subsequently neutralized. The resins thus obtained are used in papermaking as assistants for increasing the dry and wet strength of paper and result in less dulling of the whiteness of the paper.

    PREPARATION OF STABLE WATER-IN-OIL EMULSIONS OF HYDROLYZED POLYMERS OF N-VINYLAMIDES AND THEIR USE
    49.
    发明专利
    PREPARATION OF STABLE WATER-IN-OIL EMULSIONS OF HYDROLYZED POLYMERS OF N-VINYLAMIDES AND THEIR USE 未知

    公开(公告)号：CA2004144A1

    公开(公告)日：1990-06-20

    申请号：CA2004144

    申请日：1989-11-29

    Applicant: BASF AG

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

    IPC: C08F2/32 ,  C08F8/12 ,  C08F26/00 ,  C08F26/02 ,  C09K23/42 ,  D21F1/66 ,  D21H17/34 ,  C08L33/24 ,  D21H17/37

    Abstract: o.z. 0050/40418 Stable water-in-oil emulsions of hydrolyzed polymers of N-vinylamides of the formula (I) where R and R1 are each H or C1-C6-alkyl are prepared by polymerization of a compound of the formula I alone or as a mixture with other monoethylenically unsaturated monomers, in the form of a water-in-oil emulsion, to give a water-in-oil polymer emulsion, and subsequent hydrolysis of the polymer, by a process in which hydrolysis of the polymer in the form of the water-in-oil polymer emulsion is carried out in the presence of an acid or base and of from 1 to 30% by weight, based on the polymer, of an emulsifier which is obtainable by (A) reacting a C10-C22-fatty alcohol with epichlorohydrin in a molar ratio of from 1 : 0.5 to 1 : 1.5 to give a glycidyl ether, (B) reacting the glycidyl ether with (1) a saturated C2 C6-alcohol containing from 2 to 6 OH groups or (2) its monoether with a C10-C22-fatty alcohol, in a molar ratio of glycidyl ether to (1) or (2) of from 1 : 0.5 to 1 : 6, in the presence of an acid or base, and (C) alkoxylating the reaction product from (B) with one or more C2-C4-alkylene oxides in a molar ratio of from 1 : 1 to 1 : 6. The polymer emulsions obtainable in this manner are used as drainage aids, retention aids and flocculants in the making of paper and paper products.

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