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    Reducing residual monomer content of e.g. acrylic polymer dispersions
    3.
    发明专利
    Reducing residual monomer content of e.g. acrylic polymer dispersions 未知

    公开(公告)号：DE19741188A1

    公开(公告)日：1999-03-25

    申请号：DE19741188

    申请日：1997-09-18

    Applicant: BASF AG

    Inventor： RUPANER ROBERT DR ,  DOBBELAAR JOHANNES DR

    IPC: C08F6/00 ,  C08F6/06

    Abstract: Post-polymerisation reduction of the residual monomer content of an aqueous polymer dispersion comprises adding an initiator or an oxidation component of a redox system. The initiator or oxidation component is a long-chain compound which is a surface-active initiator (inisurf) with a hydroperoxide, peroxo or azo group or a surface-active hydroperoxide- or peroxo-group-containing compound.- DETAILED DESCRIPTION - Post-polymerisation reduction of the residual monomer content of an aqueous polymer dispersion obtained by free radical polymerisation of olefinically-unsaturated monomers comprises adding an initiator or an oxidation component of a redox system (together with a reduction component and optionally catalytic metal ions in the latter case), the added initiator or oxidation component being a long-chain compound which is: - (A) a long-chain, surface-active initiator (inisurf) with a hydroperoxide, peroxo or azo group, or - (B) a long-chain, surface-active hydroperoxide- or peroxo-group-containing compound obtained (optionally in situ) by oxidation of optionally modified autooxidizable olefinically-unsaturated fatty acids, fatty acid compounds, fatty alcohols or hydrocarbons.TF - TECHNOLOGY FOCUS - POLYMERS - Preferred materials: Both (A) and (B) contain at least 12C.- The azo group-containing (A) compounds are obtained by coupling a long-chain hydrophobic paraffin residue with an azo compound and the hydroperoxide- or peroxo-group-containing (A) compounds are reaction products of hydroperoxides or H2O2 with cyclic anhydrides of carboxylic or sulfonic acids containing an at least 12C paraffin hydrophobic group.- Typical (A) include reaction products of 1 mol. azobutyric acid diamidine dihydrochloride and 2 mols. tetradecylsulphonyl chloride (EP65136) and the equimolar tetradecylsuccinic anhydride/tert. butyl hydroperoxide reaction products of EP569778.- (B) are obtained by oxidation of autooxidizable fatty-acids or-alcohols which have been adducted with 2-20 mol ethylene oxide and which have also optionally been finally modified by sulfation

    4.
    发明专利
    未知

    公开(公告)号：DE19707221A1

    公开(公告)日：1998-08-27

    申请号：DE19707221

    申请日：1997-02-24

    Applicant: BASF AG

    Inventor： RUPANER ROBERT DR ,  LEY GREGOR DR ,  ZELLER DIETER DR ,  GEBHARDT NORBERT DR ,  MENDERA PETER ,  HEINZ GERHART ,  NEUTZNER JOSEF DR ,  BAUER GERHARD DR

    IPC: A01N25/10 ,  A01N59/16 ,  A01N59/20 ,  C09D5/02 ,  C08J3/20 ,  A01N37/02 ,  C08K5/098

    Abstract: In order to prepare an antibacterial and fungicidal polymer dispersion, a polymer dispersion is mixed with an amount of a protective polymer which is dispersible in the polymer dispersion, said amount being sufficient to attain an antibacterial and fungicidal effect. The protective polymer comprises: between 3 and 60 wt %, relative to the total weight of components a) and b) without metallic ions, of at least one C3 to C7 alpha, beta-monoethylenically unsaturated mono or dicarboxylic acid which is partially or completely neutralized or can be present as an anhydride, as component a); between 97 and 40 wt %, relative to the total weight of components a) and b) without metallic ions, of at least one C1 to C20 alkyl(meth)acrylate, of a C1 to C20 carboxylic acid vinyl ester, of a vinyl aromatic containing up to 20 carbon atoms, of an ethylenically unsaturated C3 to C6 nitrile, of a vinyl halide or a non-aromatic C4 to C8 hydrocarbon and at least two conjugated double bonds or ethylene or propylene as component b); between 0 and 50 wt %, relative to the total weight of components a) and b) without metallic ions, of at least one further ethylenically unsaturated monomer, as component c); and between 0 and 20 wt %, relative to the total weight of components a), b) and c) without metallic ions, of at least one cross-linking polyfunctional monomer, as component d). Between 1 and 100 mol % of the acid groups are converted into salts of at least one antibacterial and/or fungicidal metallic ion.

    Reducing residual monomer content of liquid system in polymer production
    8.
    发明专利
    Reducing residual monomer content of liquid system in polymer production 未知

    公开(公告)号：DE19741189A1

    公开(公告)日：1999-03-25

    申请号：DE19741189

    申请日：1997-09-18

    Applicant: BASF AG

    Inventor： RUPANER ROBERT DR ,  DOBBELAAR JOHANNES DR ,  LAWRENZ SVEN ,  BAUER GERHARD DR

    IPC: C08F6/00

    Abstract: Method of reducing the residual monomer (I) content in a solution, mixture, melt, suspension or dispersion of a polymer produced by free radical polymerization (liquid system). The process involves adding a nucleophilic agent (II), which forms an adduct with (I) at the reaction temperature, in an amount of 0.5-5 mole (II) /mole (I). The novelty is that (II) is stirred gradually into the liquid system in a production reactor with a height/diameter ratio of 0.8-4 in a dosing time not less than the shortest possible mixing time.

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