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    AQUEOUS PICKLING COMPOSITIONS AND THEIR USE
    1.
    发明申请
    AQUEOUS PICKLING COMPOSITIONS AND THEIR USE 审中-公开

    公开(公告)号：WO2021249878A1

    公开(公告)日：2021-12-16

    申请号：PCT/EP2021/064965

    申请日：2021-06-04

    Applicant: CHEMETALL GMBH

    Inventor： MOHR, Anna, Verena ,  SIX, Marcell ,  KHELFALLAH, Nawel, Souad

    IPC: C23C22/73 ,  C23G1/24 ,  C23G1/26 ,  C23F11/167 ,  C23F11/173 ,  C23C22/18 ,  C23C22/83 ,  C23C22/184 ,  C23C2222/20 ,  C23F11/1676

    Abstract: The invention relates to an aqueous composition having a pH value at 55 °C in the range from 5 to 9, containing at least one different amino organophosphonic acid derivatives of formula (I) wherein residues R independently of each other are CH2-PO(OR'')2, residues R' independently of each other are alkylene residues with 2 to 4 carbon atoms, residues R'' independently of each other are H, Na, K, Li or NH4; and n is an integer from 0 to 4; and at least one copolymer, which is water-soluble or water-dispersible and selected from the group consisting of at least partially neutralized poly(meth)acrylic acids and polyvinylpyrrolidones; the content of water being in the range from 80 wt.-% to 99.5 wt.-%, based on the total weight of the composition. The invention further relates to a concentrate to produce such compositions, a pickling method for pickling metallic substrates making use of the compositions, a coating method for coating metallic substrates comprising the pickling method and a use of the compositions for pickling metallic substrates.

    AQUEOUS PICKLING COMPOSITIONS AND THEIR USE
    2.
    发明申请
    AQUEOUS PICKLING COMPOSITIONS AND THEIR USE 审中-公开

    公开(公告)号：WO2021249880A1

    公开(公告)日：2021-12-16

    申请号：PCT/EP2021/064968

    申请日：2021-06-04

    Applicant: CHEMETALL GMBH

    Inventor： MOHR, Anna, Verena ,  SIX, Marcell ,  KHELFALLAH, Nawel, Souad

    IPC: C23C22/73 ,  C23G1/24 ,  C23G1/26 ,  C23F11/167 ,  C23C22/18 ,  C23C22/83 ,  C23C22/184 ,  C23C2222/20 ,  C23F11/1676

    Abstract: The invention relates to an aqueous composition having a pH value at 55 °C in the range from 5 to 9, containing at least two different amino organophosphonic acid derivatives of formula (I) wherein residues R independently of each other are CH2-PO(OR'')2, residues R' independently of each other are alkylene residues with 2 to 4 carbon atoms, residues R'' independently of each other are H, Na, K, Li or NH4; and n is an integer from 0 to 4; and wherein the at least two different amino organophosphonic acid derivatives differ in the value of n. The invention further relates to a concentrate to produce such compositions, a pickling method for pickling metallic substrates making use of the compositions, a coating method for coating metallic substrates comprising the pickling method and a use of the compositions for pickling metallic substrates.

    PHOSPHONATE-FREE, AQUEOUS PICKLING COMPOSITIONS AND THEIR USE
    3.
    发明申请
    PHOSPHONATE-FREE, AQUEOUS PICKLING COMPOSITIONS AND THEIR USE 审中-公开

    公开(公告)号：WO2021249879A1

    公开(公告)日：2021-12-16

    申请号：PCT/EP2021/064967

    申请日：2021-06-04

    Applicant: CHEMETALL GMBH

    Inventor： MOHR, Anna, Verena ,  SIX, Marcell ,  KHELFALLAH, Nawel, Souad

    IPC: C23C22/73 ,  C23G1/24 ,  C23G1/26 ,  C23C22/18 ,  C23C22/83 ,  C23C22/184 ,  C23C2222/20

    Abstract: The invention relates to a phosphonate-free, aqueous pickling composition having a pH value at 55 °C in the range from 5 to 9, and containing at least one copolymer, which is water-soluble or water-dispersible and selected from the group consisting of polyvinylpyrrolidones; the content of water being in the range from 95.0 wt.-% to 99.9 wt.-% based on the total weight of the composition. The invention further relates to a concentrate to produce such compositions, a pickling method for pickling metallic substrates making use of the compositions, a coating method for coating metallic substrates comprising the pickling method and a use of the compositions for pickling metallic substrates.

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