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    1.
    发明专利
    未知

    公开(公告)号：AT197323T

    公开(公告)日：2000-11-15

    申请号：AT97107491

    申请日：1997-05-07

    Applicant: BASF AG

    Inventor： SCHUMACHER KARL-HEINZ DR ,  HUMMERICH RAINER DR ,  KIRSCH HOWARD PETER DR

    IPC: D04H1/435 ,  D04H1/587 ,  D04H1/64 ,  D04H1/645 ,  D04H3/011 ,  D04H3/12

    Abstract: A method for removing a polymer binder containing carboxylate groups cross-linked via alkaline earth metal ions from impregnated nonwovens comprises: (1) the nonwoven is treated with an aqueous alkali salt solution so that the alkali salt anions combine with the alkaline earth metal cations to form a poorly soluble salt or chelate; and (2) the binder-free fibres are separated. Preferably a phase transfer catalyst, preferably an alkyl phenol ethoxylate, fatty alcohol ethoxylate, oxo alcohol ethoxylate or quat. organic ammonium salt, is used in the alkali salt solution. Calcium ions are the cations present. The binder comprises a radical-polymerised polymer containing 0.1-30 wt.% carboxylate groups, of which 50-100 wt.% are present as salts containing alkaline earth metal cations. The alkali salt solution has a temperature of 10-100 degrees C. The nonwoven is added to the alkali salt solution, which is then optionally stirred before separating the fibres 1-60 minutes later.

    2.
    发明专利
    未知

    公开(公告)号：DE19609311A1

    公开(公告)日：1997-09-11

    申请号：DE19609311

    申请日：1996-03-09

    Applicant: BASF AG ,  DOERKEN GMBH & CO KG

    Inventor： BEUTLER KUNO ,  HAEBERLE KARL DR ,  KIRSCH HOWARD PETER DR ,  JABLONKA DIETER

    IPC: C08G18/08 ,  C08K5/00 ,  C08K5/3492 ,  C09D175/04 ,  D06N3/14 ,  C08L75/04 ,  B32B5/18 ,  B32B5/24 ,  B32B27/40 ,  C08J3/03 ,  C08L25/10

    Abstract: The invention concerns aqueous dispersions which are suitable for preparing coated textiles and, relative to the solids content, contain: a) between 10 and 60 wt.% or polyurethane which carries hydrophilic groups rendering the polyurethane water-dispersible; b) between 5 and 30 wt.% of a copolymer composed of: b1) between 10 and 50 wt.% styrene; b2) between 90 and 10 wt.% butadiene; and b3) between 0 and 20 wt.% of a further ethylenically unsaturated monomer which can be radically copolymerized with styrene; c) between 0.1 and 5 wt.% of an emulsifier; d) between 5 and 30 wt.% melamine; e) between 0.1 and 30 wt.-% of an animoplastic or phenolic resin; f) between 1 and 30 wt.% of a flame proofing agent; and g) between 1 and 70 wt.% of a kaolin.

    4.
    发明专利
    未知

    公开(公告)号：ES2152593T3

    公开(公告)日：2001-02-01

    申请号：ES97107491

    申请日：1997-05-07

    Applicant: BASF AG

    Inventor： SCHUMACHER KARL-HEINZ DR ,  HUMMERICH RAINER DR ,  KIRSCH HOWARD PETER DR

    IPC: D04H1/435 ,  D04H1/587 ,  D04H1/64 ,  D04H1/645 ,  D04H3/011 ,  D04H3/12

    Abstract: A method for removing a polymer binder containing carboxylate groups cross-linked via alkaline earth metal ions from impregnated nonwovens comprises: (1) the nonwoven is treated with an aqueous alkali salt solution so that the alkali salt anions combine with the alkaline earth metal cations to form a poorly soluble salt or chelate; and (2) the binder-free fibres are separated. Preferably a phase transfer catalyst, preferably an alkyl phenol ethoxylate, fatty alcohol ethoxylate, oxo alcohol ethoxylate or quat. organic ammonium salt, is used in the alkali salt solution. Calcium ions are the cations present. The binder comprises a radical-polymerised polymer containing 0.1-30 wt.% carboxylate groups, of which 50-100 wt.% are present as salts containing alkaline earth metal cations. The alkali salt solution has a temperature of 10-100 degrees C. The nonwoven is added to the alkali salt solution, which is then optionally stirred before separating the fibres 1-60 minutes later.

    5.
    发明专利
    未知

    公开(公告)号：DE19619639A1

    公开(公告)日：1997-11-20

    申请号：DE19619639

    申请日：1996-05-15

    Applicant: BASF AG

    Inventor： SCHUMACHER KARL-HEINZ DR ,  HUMMERICH RAINER DR ,  KIRSCH HOWARD PETER DR

    IPC: D04H1/435 ,  D04H1/587 ,  D04H1/64 ,  D04H1/645 ,  D04H3/011 ,  D04H3/12 ,  C08J11/16 ,  C08K5/138 ,  D01G9/00

    Abstract: A method for removing a polymer binder containing carboxylate groups cross-linked via alkaline earth metal ions from impregnated nonwovens comprises: (1) the nonwoven is treated with an aqueous alkali salt solution so that the alkali salt anions combine with the alkaline earth metal cations to form a poorly soluble salt or chelate; and (2) the binder-free fibres are separated. Preferably a phase transfer catalyst, preferably an alkyl phenol ethoxylate, fatty alcohol ethoxylate, oxo alcohol ethoxylate or quat. organic ammonium salt, is used in the alkali salt solution. Calcium ions are the cations present. The binder comprises a radical-polymerised polymer containing 0.1-30 wt.% carboxylate groups, of which 50-100 wt.% are present as salts containing alkaline earth metal cations. The alkali salt solution has a temperature of 10-100 degrees C. The nonwoven is added to the alkali salt solution, which is then optionally stirred before separating the fibres 1-60 minutes later.

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