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    Method for pretreating aluminum materials, particularly aluminum wheels
    33.
    发明授权
    Method for pretreating aluminum materials, particularly aluminum wheels 有权

    公开(公告)号：US11261531B2

    公开(公告)日：2022-03-01

    申请号：US16645725

    申请日：2018-09-11

    Applicant: CHEMETALL GMBH ,  RHODIA OPERATIONS

    Inventor： Lars Sebralla ,  Nawel Souad Khelfallah ,  Manfred Walter ,  Marie-Pierre Labeau ,  Guillaume Gody

    IPC: C23G1/12 ,  C23C22/80 ,  B05D7/16 ,  C09D133/02 ,  C09D143/02 ,  C09D5/08 ,  C23C22/34 ,  C23G1/22

    Abstract: Provided herein is a method for pretreating aluminum materials, particularly aluminum wheels, wherein an aluminum material is successively i) cleaned and subsequently rinsed, ii) optionally subjected to alkaline pickling and subsequently rinsed, iii) optionally contacted with an aqueous composition comprising at least one mineral acid, iv) optionally rinsed and v) contacted with an acidic aqueous composition comprising a) at least one compound selected from the group consisting of titanium, zirconium and hafnium compounds and b) at least one linear terpolymer prepared by controlled radical polymerisation and comprising vinylphosphonic acid monomeric units, hydroxylethyl- and/or hydroxylpropyl-(meth)acrylate monomeric units and (meth)acrylic acid monomeric units, vi) optionally rinsed, vii) optionally contacted with another aqueous composition, viii) optionally rinsed and ix) optionally dried. Further provided herein is a corresponding composition as well as the use of the materials treated according to the method.

    METAL SURFACE TREATMENT
    34.
    发明申请
    METAL SURFACE TREATMENT 有权

    公开(公告)号：US20220002562A1

    公开(公告)日：2022-01-06

    申请号：US17293537

    申请日：2019-11-27

    Applicant: RHODIA OPERATIONS

    Inventor： Marie-Pierre LABEAU

    IPC: C09D5/08 ,  C08F220/06 ,  C09D5/00 ,  C09D133/02 ,  C23C22/36 ,  C23C22/83 ,  C23C22/78

    Abstract: The instant invention concerns the use of at least one polymer P obtained by radical copolymerization of a mixture of (i) acrylic acid; (ii) methacrylic acid; and (iii) at least one 2-hydroxyethyl methacrylate phosphate for treating a metallic surface intended to be coated by a paint, a varnish or an adhesive. The invention also concerns methods of coatings making use of this polymer P, compositions comprising the polymer P and useful for these methods, and the obtained coated materials.

    PRECIPITATED SILICA AND PROCESS FOR ITS MANUFACTURE
    35.
    发明申请
    PRECIPITATED SILICA AND PROCESS FOR ITS MANUFACTURE 有权

    公开(公告)号：US20210387858A1

    公开(公告)日：2021-12-16

    申请号：US17291027

    申请日：2019-11-06

    Applicant: RHODIA OPERATIONS

    Inventor： Frédéric COLBEAU-JUSTIN ,  Emmanuelle ALLAIN NAJMAN ,  Pascaline LAURIOL-GARBEY

    IPC: C01B33/193 ,  C08K3/36 ,  B01J21/08 ,  B01J20/10 ,  A61L15/18

    Abstract: Precipitated silica having large median particle size for use as reinforcing filler in elastomeric compositions as well as its method of manufacture. In particular, a precipitated silica characterised by a CTAB surface area SCTAB in the range from 70 to 350 m2/g; an amount WM of at least one metal M selected from elements of groups 3, 4 and 5 of at least 0.1 mol %; and a median particle size d50, measured by centrifugal sedimentation, such that: |d50|≥183×|RION|×|WM|−0.67×|SCTAB|+233 (I) wherein |d50| represents the numerical value of median particle size d50 measured by centrifugal sedimentation and expressed in nm; |RION|, the numerical value of the ionic radius of metal M expressed in nm; |SCTAB|, the numerical value of the CTAB surface area SCTAB expressed in m2/g; and |WM|, the numerical value of the percentage molar amount of the metal WM.

    Controlled radical polymerization in water-in-water dispersion
    39.
    发明授权
    Controlled radical polymerization in water-in-water dispersion 有权

    公开(公告)号：US11168165B2

    公开(公告)日：2021-11-09

    申请号：US16191698

    申请日：2018-11-15

    Applicant: RHODIA OPERATIONS

    Inventor： Mathias Destarac ,  David James Wilson ,  Silvia Stoilova

    IPC: C08F2/28 ,  C08F220/56 ,  C08F293/00 ,  C09D153/00 ,  C09J153/00 ,  C08F2/10 ,  C08F2/38

    Abstract: The present invention relates to a method for preparing an aqueous dispersion of water-soluble polymers, which comprises a step (E) of radical polymerization, wherein the following are brought into contact in an aqueous medium (M) in which the synthesised polymer is not soluble: at least one ethylenically unsaturated monomer which is soluble in the aqueous medium (M); at least one source of free radicals; and a reactive stabiliser which comprises: a polymer chain (CP) which is soluble in the medium (M), a group (G) providing the radical polymerization of step (E) with a living and controlled nature, such as, for example, a group carrying a thiocarbonylthio —S(C═S)— group.

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