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    4.
    发明专利
    未知

    公开(公告)号：DE3766045D1

    公开(公告)日：1990-12-13

    申请号：DE3766045

    申请日：1987-08-08

    Applicant: BASF AG

    Inventor： DEGEN HANS-JUERGEN DR ,  REICHEL FRITZ DR ,  RIEBELING ULRICH ,  HOEHR LOTHAR DR

    IPC: C08F220/12 ,  C08F2/22 ,  C08F2/24 ,  C08F220/10 ,  C08F220/18 ,  C08F220/42 ,  C08F251/00 ,  C08F290/00 ,  D21H17/28 ,  D21H17/37 ,  D21H17/55 ,  D21H21/16

    Abstract: Sizes for paper are based on finely divided aqueous dispersions of copolymers which are obtainable by copolymerization of from 10 to 56 parts by weight of a monomer mixture of (a) from 20 to 65% by weight of (meth)acrylonitrile, (b) from 35 to 80% by weight of one or more acrylates of monohydric, saturated C3-C8-alcohols and (c) from 0 to 10% by weight of other ethylenically unsaturated copolymerizable monomers by an emulsion polymerization method in 100 parts by weight of an aqueous solution of from 1.7 to 25% by weight of a degraded starch having a viscosity eta i of from 0.12 to 0.50 dl/g, at from 40 DEG to 100 DEG C. in the presence of a peroxide-containing initiator.

    Process for internal sizing of paper
    5.
    发明专利
    Process for internal sizing of paper 未知

    公开(公告)号：DE3316179A1

    公开(公告)日：1984-11-08

    申请号：DE3316179

    申请日：1983-05-04

    Applicant: BASF AG

    Inventor： REICHEL FRITZ DR ,  FREY GUENTER DR

    IPC: C08L61/00 ,  C08L79/02 ,  C09K23/16 ,  D21H17/17 ,  D21H17/45 ,  D21H17/49 ,  D21H17/56 ,  D21H3/38 ,  D21H3/52

    Abstract: A process for internal sizing of paper and paper-like products by adding (A) emulsions of fatty alkyl-diketenes and (B) polyethyleneimine with 20 to 500 ethyleneimine units and/or water-soluble condensation products, which are obtainable by grafting 100 parts by weight of water-soluble polyamido-amines with 20 to 400 parts by weight of ethyleneimine and crosslinking of the ethyleneimine-grafted products by means of difunctional crosslinking agents, to the paper stock and draining of the paper stock with sheet formation leads to diketene sizing which manifests itself within a short time.

    SMALL-PARTICLES POLYMER DISPERSIONS CONTAINING POLYMERISED NITROGEN-CONTAINING MONOMERS
    9.
    发明专利
    SMALL-PARTICLES POLYMER DISPERSIONS CONTAINING POLYMERISED NITROGEN-CONTAINING MONOMERS 未知

    公开(公告)号：DE3162897D1

    公开(公告)日：1984-05-03

    申请号：DE3162897

    申请日：1981-09-21

    Applicant: BASF AG

    Inventor： REICHEL FRITZ DR ,  RICHTER KONRAD DR ,  HOEHR LOTHAR DR

    IPC: C08F2/06 ,  C08F220/34 ,  C08F246/00 ,  D21H17/42 ,  D21H17/45 ,  D21H21/16 ,  D21H3/38

    Abstract: 1. A finely divided polymer dispersion which contains polymerized units of nitrogen-containing monomers, and is obtained by a two-stage polymerization reaction, wherein, in the first polymerization stage, a low molecular weight prepolymer, which has a viscosity of from 1.06 to 1.40 (measured in an Ubbelohde viscometer) in a 1% strength solution of a mixture of 99 parts by weight of dimethyl formamide and 1 part by weight of glacial acetic acid at 20 degrees C, is prepared in a water-miscible solvent, which may contain up to 15% by weight of water, in the manner of a solution copolymerization from a monomer mixture which contains (a) per mole of a nitrogen-containing monomer of the formula see diagramm : EP0051144,P13,F1 or see diagramm : EP0051144,P13,F3 where A is O or NH, B is Cn H2n , n being from 1 to 8, R**1 and R**2 are each Cm H2m+1 , m being from 1 to 4, R**3 is H or CH3 , X4 **- is OH**- , Cl**- , Br**- or CH3 -OSO3 H**- , and R**4 is Cm H2m+1 , m being from 1 to 4, (b) 2.5 to 10 moles of at least one nonionic, hydrophobic, ethylenically unsaturated monomer which, if it is polymerized on its own, forms a hydrophobic polymer, (c) 0.5 to 1.5 moles of an ethylenically unsaturated carboxylic acid or maleic anhydride, and (d) 0 to 7 moles of a nonionic, hydrophilic, ethylenically unsaturated monomer, the solution of the prepolymer is diluted with water in a weight ratio of from 1:3 to 1:50 and, in the second polymerization stage, 1 to 32 parts by weight of at least one nonionic, hydrophobic, ethylenically unsaturated monomer, which is the same as monomer (b) of the prepolymer, are polymerized per part by weight of the solution polymer in this polymer solution in the manner of an emulsion polymerization in the presence of a usual amount of a water-soluble polymerization initiator.

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