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    MANUFACTURE OF CELLULOSIC PULP SHEETS
    1.
    发明申请
    MANUFACTURE OF CELLULOSIC PULP SHEETS 审中-公开
    纤维纸浆的制造

    公开(公告)号：US20150027651A1

    公开(公告)日：2015-01-29

    申请号：US14453282

    申请日：2014-08-06

    Applicant: BASF SE

    Inventor： Christian JEHN-RENDU ,  Joachim Hege ,  Detlef Kannengiesser

    IPC: D21H21/10 ,  D21H17/56 ,  D21H17/45 ,  D21H17/37

    CPC classification number: D21H21/10 ,  D21C9/002 ,  D21C9/18 ,  D21H17/37 ,  D21H17/375 ,  D21H17/45 ,  D21H17/56

    Abstract: A pulp making process in which fibrous cellulosic material is pulped to form an aqueous suspension of cellulosic material, the suspension is drained through a screen to form a pulp sheet and that the pulp sheet is dried to form a dry market pulp, in which a water soluble cationic polymer is added to the suspension as the sole drainage aid wherein the water-soluble cationic polymer is either, i) a copolymer comprising (a) between 1 and 70 mole % (meth) acrylamide and (b) between 30 and 99 mole % (meth) acryloyloxyethyltrimethyl ammonium chloride with an intrinsic viscosity between 5 and 9 dl/g; or ii) a hydrolysed homopolymer of vinylformamide comprising between 1 and 100 mole % vinyl amine units and having a K value of between 45 and 240. The process of the invention provides improved drainage time and solids content of the dewatered pulp.

    Abstract translation: 一种制浆工艺，其中将纤维状纤维素材料制浆以形成纤维素材料的水悬浮液，将悬浮液通过筛网排出以形成纸浆片，并将纸浆片干燥以形成干市场纸浆，其中水 将可溶性阳离子聚合物作为唯一的助溶剂加入到悬浮液中，其中水溶性阳离子聚合物为：i）包含（a）1-70摩尔％（甲基）丙烯酰胺和（b）30-99摩尔 ％（甲基）丙烯酰氧基乙基三甲基氯化铵，特性粘度在5至9dl / g之间; 或ii）乙烯基甲酰胺的水解均聚物，其包含1至100摩尔％的乙烯基胺单元并且具有45至240的K值。本发明的方法提供了脱水纸浆的改进的排水时间和固体含量。

    PROCESS FOR THE MANUFACTURE OF PAPER AND PAPERBOARD
    3.
    发明申请
    PROCESS FOR THE MANUFACTURE OF PAPER AND PAPERBOARD 审中-公开
    纸和纸板的制造工艺

    公开(公告)号：US20150345081A1

    公开(公告)日：2015-12-03

    申请号：US14760381

    申请日：2014-01-09

    Applicant: BASF SE

    Inventor： Christopher Alan GRAY ,  Antonius MOORMANN-SCHMITZ ,  Hubert MEIXNER ,  Luis Miguel SANCHEZ CERRO ,  Thomas MUEHLENBERND ,  Christian JEHN-RENDU

    IPC: D21H17/00 ,  D21H17/45 ,  D21H17/68 ,  D21H11/20

    CPC classification number: D21H17/74 ,  D21H11/20 ,  D21H17/375 ,  D21H17/44 ,  D21H17/45 ,  D21H17/55 ,  D21H17/56 ,  D21H17/68 ,  D21H21/10 ,  D21H23/04 ,  D21H23/18

    Abstract: Process for the Manufacture of Paper and Paperboard The present invention relates to a process of making paper or paperboard in which a cellulosic thin stock is provided and subjected to one or more shear stages and then drained and a moving screen to form a sheet which is dried, wherein the process employs a retention system which is applied to the thin stock, said retention system comprising as components i) a blend of different cationic polymers and ii) a microparticulate material, in which the blend of cationic polymers comprises, a) a cationic polymer having a charge density of from 0.5 and below 3 mEq per gram and a molar mass of greater than 700,000 Da, which cationic polymer is selected from polymers containing vinyl amine units and polyethylenimine, b) a cationic polymer having a charge density of below 3 mEq per gram and an intrinsic viscosity of at least 3 dl/g, wherein one of the components of the retention system is dosed into the thin stock after the final shearing stage and the other is dosed into the thin stock before the final shearing stage.

    Abstract translation: 纸和纸板的制造方法技术领域本发明涉及一种制造纸或纸板的方法，其中提供纤维素薄料并经受一个或多个剪切阶段然后排干，并移动筛网以形成干燥的片材 其中所述方法采用应用于稀浆的保留系统，所述保留系统包含作为组分的i）不同阳离子聚合物的共混物和ii）微粒材料，其中阳离子聚合物的共混物包含：a）阳离子 电荷密度为0.5〜3mEq / g，摩尔质量大于700,000Da的聚合物，该阳离子聚合物选自含有乙烯基胺单元和聚乙烯亚胺的聚合物，b）电荷密度低于3的阳离子聚合物 mEq /克，特性粘度至少为3dl / g，其中保留体系的组分之一在最终剪切阶段之后投入稀浆中 另一个在最终剪切阶段之前投入稀薄的原料。

    PROCESS FOR PRODUCING AN AQUEOUS POLYMER DISPERSION FROM A VINYL AROMATIC COMPOUND AND A CONJUGATED ALIPHATIC DIENE
    5.
    发明申请
    PROCESS FOR PRODUCING AN AQUEOUS POLYMER DISPERSION FROM A VINYL AROMATIC COMPOUND AND A CONJUGATED ALIPHATIC DIENE 有权

    公开(公告)号：US20250146225A1

    公开(公告)日：2025-05-08

    申请号：US18838062

    申请日：2023-02-06

    Applicant: BASF SE

    Inventor： Carmen-Elena CIMPEANU ,  Christian JEHN-RENDU ,  Justin Andrew BORDLEY ,  Claudia WOOD

    IPC: D21H19/20 ,  D21H19/58 ,  D21H21/16 ,  D21H21/18

    Abstract: The invention relates to a process for producing an aqueous polymer dispersion by means of radically initiated aqueous emulsion polymerisation by polymerising, in an aqueous medium, in accordance with a monomer feed process: (a) 40 to 75 parts by weight styrene; (b) 24.9 to 59.9 parts by weight butadiene; (c) 0.1 to 10 parts by weight of at least one ethylenically unsaturated carboxylic acid; and (d) 0 to 15 parts by weight other monomers, wherein the parts by weight of monomers (a) to (d) add up to 100 parts by weight, which process comprises the following steps: a) creating a template of a seed latex and 1 to 10 parts by weight monomers, based on the total monomer amount; b) starting the polymerisation at a temperature ≥80° C. in this template; and c) subsequently steadily metering monomers and emulsifier into this reaction mixture; c1) wherein at a time when 40 to 55% of the total metering time of the monomers has elapsed and 40 to 55 parts by weight of the monomer amounts to be metered in are metered in, the metering rate of the emulsifier for a period P2 that lasts at most for 30 minutes is increased to 10 to 100 times the average metering rate of the emulsifier during the period P1, wherein the period P1 is the preceding length of time beginning with the start of the emulsifier metering; c2) and at a time when 60 to 85% of the total metering time of the monomers has elapsed and 60 to 85 parts by weight of the monomer amount to be metered in are metered in, the metering rate of the emulsifier for a period P4 that lasts at most 30 minutes is increased to 10 to 120 times the average metering rate of the emulsifier of the period P1 and with the proviso that the aqueous polymer dispersion has a solids content of ≥58 wt. %. The invention also relates to the dispersion obtained according to the process, and to the use thereof as a binder, adhesive, sizing agent for fibres, for producing coatings or for producing a paper coating slip.

    BINDER COMPOSITION FOR BOARD COATING SLIPS
    6.
    发明申请
    BINDER COMPOSITION FOR BOARD COATING SLIPS 有权

    公开(公告)号：US20230049303A1

    公开(公告)日：2023-02-16

    申请号：US17881652

    申请日：2022-08-05

    Applicant: BASF SE

    Inventor： Christian JEHN-RENDU ,  Silke BOERNER ,  Steffen GEIGER

    IPC: C09D5/02 ,  C09D125/14 ,  C09D7/61

    Abstract: The invention relates to a coating slip comprising (i) an aqueous dispersion of one or more vinyl acetate polymers, obtainable by free-radically initiated emulsion polymerization of 77% to 99% by weight of vinyl acetate, 1% to 13% by weight of ethylene and 0% to 10% by weight of one or more monoethylenically unsaturated monomers that are neither vinyl acetate nor ethylene, where the amounts of the monomers add up to 100% by weight, (ii) an aqueous dispersion of one or more styrene copolymers, obtainable by free-radically initiated emulsion polymerization of a monomer composition comprising 35% to 70% by weight of styrene, 20% to 60% by weight of one or more esters of acrylic and/or methacrylic acid with alkanols having 1 to 12 carbon atoms, or of one or more conjugated aliphatic dienes, 1% to 10% by weight of one or more monomers comprising acid groups, where the amounts of the monomers add up to 100% by weight, (iii) inorganic pigments and (iv) optionally further auxiliaries, where the total amount of emulsion polymers (i) and (ii) is 10 to 30 parts by weight based on 100 parts by weight of inorganic pigment (iii) and where the weight ratio of the styrene copolymer to the vinyl acetate polymer is 77:23 to 93:7, and to a method of producing the coating slip, to the use thereof for coating board, to a method of coating board with the coating slip and to the board coated thereby.

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