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    DEFOAMING AGENT FOR THE PAPER INDUSTRY BASED ON OIL IN WATER EMULSIONS
    86.
    发明专利
    DEFOAMING AGENT FOR THE PAPER INDUSTRY BASED ON OIL IN WATER EMULSIONS 未知

    公开(公告)号：CA2141576A1

    公开(公告)日：1994-04-14

    申请号：CA2141576

    申请日：1993-09-18

    Applicant: BASF AG

    Inventor： SCHUHMACHER RUDOLF ,  DRALLE-VOSS GABRIELE ,  OPPENLAENDER KNUT ,  WEGNER BRIGITTE

    IPC: D21H17/14 ,  D21H19/44 ,  D21H21/12 ,  D21C3/28

    Abstract: Antifoams based on oil-in-water emulsions, in which the oil phase accounts for from 5 to 50% by weight of the emulsions and consists essentially of a mixture of (a) fatty esters of C12-C22-carboxylic acids with mono hydric to trihydric C1-C22-alcohols, (b) polyglyceryl esters which are obtainable by at least 20% esterification of polyglycerols which contain at least 2 glyceryl units with at least one C12-C36-fatty acid and (c) fatty esters of C12-C22-carboxylic acids and poly alkylene glycols, the molecular weight of the polyalkylene glycols being up to 5,000 g/mol, and, if required, (d) long-chain alcohols, fatty esters of alcohols of at least 22 carbon atoms and C1-C36-carboxylic acids, distillation residues which are obtainable in the preparation of alcohols having a relatively large number of carbon atoms by oxo synthesis or by the Ziegler process and which may be alkoxylated, and/or e) hydrocarbons having a boiling point above 200.degree.C or fatty acids of 12 to 22 carbon atoms, are used for controlling foam in pulp digestion, in the beating of paper stock, in papermaking and in the dispersing of pigments for papermaking.

    87.
    发明专利
    未知

    公开(公告)号：FI923754A0

    公开(公告)日：1992-08-20

    申请号：FI923754

    申请日：1992-08-20

    Applicant: BASF AG

    Inventor： WEGNER BRIGITTE ,  OPPENLAENDER KNUT ,  SCHUHMACHER RUDOLF ,  HOHMANN ANDREAS ,  DRALLE-VOSS GABRIELE

    IPC: B01J13/00 ,  C09K23/00 ,  C09K23/42 ,  D21C3/28 ,  D21D1/20 ,  D21H17/00 ,  D21H17/14 ,  D21H21/12 ,  D21H

    Abstract: In anti-foams for the paper industry, based on oil-in-water emulsions, the oil phase makes up 5 to 50 % by weight of the bulk of the emulsion and contains (a) an alcohol having at least 12 carbon atoms, fatty acid esters of alcohols having at least 22 carbon atoms and C1- to C36-carboxylic acids, distillation residues which are obtainable in the production of alcohols having a higher carbon number by oxo synthesis or by the Ziegler process and which may be alkoxylated, mixtures of the said compounds and/or (b) a fatty acid ester of C12- to C22-carboxylic acids with monohydric to trihydric C1- to C18-alcohols and, if appropriate, (c) a hydrocarbon having a boiling point above 200 DEG C or fatty acids having 12 to 22 carbon atoms in combination with (d) 1 to 80 % by weight of polyglycerol esters which can be prepared by an at least 20% esterification of polyglycerol mixtures which contain, as essential constituents, diglycerol, triglycerol, tetraglycerol and, if appropriate, more highly condensed polyglycerols, with saturated or unsaturated C12- to C36-fatty acids. i

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