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    Surface sizing composition, method of production, and use thereof
    3.
    发明授权
    Surface sizing composition, method of production, and use thereof 有权

    公开(公告)号：US11242423B2

    公开(公告)日：2022-02-08

    申请号：US16499302

    申请日：2018-03-29

    申请人： KEMIRA OYJ

    发明人： Anneli Lepo ,  Tarja Turkki ,  Elsi Turunen

    IPC分类号： D21H17/35 ,  C08F212/08 ,  C08F220/18 ,  C08F2/22 ,  C08L3/02 ,  D21H17/37 ,  D21H17/66 ,  D21H19/22 ,  D21H19/64 ,  D21H21/16

    摘要： The present invention relates to a surface sizing composition comprising a metal salt, wherein the metal has at least 3 valence electrons, and an aqueous polymer dispersion, wherein the aqueous polymer dispersion is an aqueous polymer dispersion (A) obtainable by free radical emulsion copolymerizing a first ethylenically unsaturated monomer blend comprising (a) 0 to 75% by weight of at least one optionally substituted styrene, (b) 15 to 100% by weight of at least one C1-C4-alkyl (meth)acrylate, and (c) 0 to 10% by weight of other ethylenically unsaturated copolymerizable monomers, wherein the sum (a)+(b)+(c) is 100%, in the presence of a water-soluble redox system comprising a first free radical initiator for the free radical emulsion copolymerization and an aqueous prepolymer composition (B) obtainable by free radical emulsion copolymerizing in a polymerization solvent comprising C1-6-carboxylic acid and C1-6-carboxylic acid anhydride, a second ethylenically unsaturated monomer blend comprising (i) 5 to 50% by weight of at least one ethylenically unsaturated quaternary amine selected from quaternary salt of N,N,N-tri(C1-4-alkyl)amino C1-4-alkyl(meth)acrylate with a mineral acid or an organic acid and/or quaternary salt of N,N,N-tri(C1-4-alkyl)amino C1-4-alkyl(meth)acrylamide with a mineral acid or an organic acid, (ii) 0 to 40%, preferably 0%, by weight of at least one ethylenically unsaturated tertiary amine selected from N,N-di(C1-4-alkyl)amino C1-4-alkyl(meth)acrylate and/or N,N-di(C1-4-alkyl)amino C1-4-alkyl(meth)acrylamide, (iii) 10 to 95% by weight of at least one optionally substituted styrene, (iv) 0 to 50% by weight of at least one C1-C4-alkyl (meth)acrylate, and (v) 0 to 10% by weight of other ethylenically unsaturated copolymerizable monomers, wherein the sum (i)+(ii)+(iii)+(iv)+(v) is 100%, in the presence of a second free radical initiator, and adding water to the obtained polymer dispersion to obtain the aqueous prepolymer composition. The present invention further relates to production thereof and use on cellulosic materials.

    Coating structure, sheet-like product and its use
    7.
    发明授权
    Coating structure, sheet-like product and its use 有权

    公开(公告)号：US11242654B2

    公开(公告)日：2022-02-08

    申请号：US16617770

    申请日：2018-06-14

    申请人： Kemira Oyj

    发明人： Tarja Turkki ,  Anneli Lepo

    IPC分类号： D21H19/82 ,  B65D65/42 ,  D21H19/20 ,  D21H19/40 ,  D21H19/54 ,  D21H19/58 ,  D21H19/64 ,  D21H27/10

    摘要： A coating structure for a sheet-like substrate, which includes lignocellulosic fibres is disclosed. The structure includes at least one pre-coat layer including at least 70 weight-% of a first styrene (meth)acrylate copolymer polymerised in the presence of a stabiliser, having a glass transition temperature Tg ≤20° C. preferably ≤10° C., ≤30 weight-% of inorganic platy mineral particles and 0.01-2 weight-% of at least one first thickener. The coating structure further includes a top coat layer including at least 50 weight-% of a second styrene (meth)acrylate copolymer polymerised in the presence of a stabiliser having a glass transition temperature Tg ≤20° C. preferably ≤10° C., ≤30 weight-% of inorganic mineral particles, 0.01-5 weight-% of at least one second thickener and 0.5-30 weight-% of an antiblocking agent. Further disclosed is a sheet-like product coated with the coating structure.

    Cationic surface sizing agent
    9.
    发明授权
    Cationic surface sizing agent 有权

    公开(公告)号：US10907307B2

    公开(公告)日：2021-02-02

    申请号：US16062550

    申请日：2016-12-28

    申请人： Kemira OYJ

    发明人： Anneli Lepo ,  Elsi Turunen ,  Tarja Turkki

    IPC分类号： D21H21/16 ,  D21H17/45 ,  D21H13/08 ,  C08F220/34 ,  C08F220/64 ,  C08F220/66 ,  C08F267/02 ,  C08F2/22 ,  C08F212/08 ,  C08F257/02 ,  D21H17/37 ,  D21H23/56 ,  C08K3/20 ,  C08F220/18

    摘要： Provided herein is an aqueous polymer dispersion (A) obtainable by free radical emulsion copolymerizing a first ethylenically unsaturated monomer blend having 15 to 100% by weight of at least one C1-C4-alkyl (meth)acrylate, in the presence of a water-soluble redox system having a first free radical initiator for free radical emulsion copolymerization and an aqueous prepolymer composition (B) obtainable by free radical emulsion copolymerizing in a polymerization solvent having C1-6-carboxylic acid and C1-6-carboxylic acid anhydride a second ethylenically unsaturated monomer blend with 5 to 50% by weight of at least one ethylenically unsaturated quaternary amine, and 10 to 95% by weight of at least one optionally substituted styrene, in the presence of a second free radical initiator.

    CATIONIC SURFACE SIZING AGENT
    10.
    发明申请
    CATIONIC SURFACE SIZING AGENT 审中-公开

    公开(公告)号：US20190003124A1

    公开(公告)日：2019-01-03

    申请号：US16062550

    申请日：2016-12-28

    申请人： Kemira OYJ

    发明人： Anneli Lepo ,  Elsi Turunen ,  Tarja Turkki

    IPC分类号： D21H21/16 ,  D21H17/45 ,  D21H13/08 ,  C08F212/08 ,  C08F220/34 ,  C08F220/64 ,  C08F220/66 ,  C08F257/02 ,  C08F2/22

    摘要： Provided herein is an aqueous polymer dispersion (A) obtainable by free radical emulsion copolymerizing a first ethylenically unsaturated monomer blend having 15 to 100% by weight of at least one C1-C4-alkyl (meth)acrylate, in the presence of a water-soluble redox system having a first free radical initiator for free radical emulsion copolymerization and an aqueous prepolymer composition (B) obtainable by free radical emulsion copolymerizing in a polymerization solvent having C1-6-carboxylic acid and C1-6-carboxylic acid anhydride a second ethylenically unsaturated monomer blend with 5 to 50% by weight of at least one ethylenically unsaturated quaternary amine, and 10 to 95% by weight of at least one optionally substituted styrene, in the presence of a second free radical initiator.