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    Aqueous polymer dispersions
    2.
    发明授权
    Aqueous polymer dispersions 有权

    公开(公告)号：US11098147B2

    公开(公告)日：2021-08-24

    申请号：US16480796

    申请日：2017-01-27

    申请人： CELANESE INTERNATIONAL CORPORATION

    发明人： Matthias Junk ,  Harald Petri ,  Stephan Krieger

    IPC分类号： C08F265/06 ,  C08F2/22 ,  C08F220/18 ,  C08F220/54 ,  C09D151/00

    摘要： An aqueous polymer dispersion is produced by multistage emulsion polymerization, in which a monomer composition I comprising 19 to 29 wt % hard monomers and 64 to 74 wt % soft monomers is polymerized to produce a first polymer phase and then a monomer composition II comprising 65 to 95 wt % hard monomers and 5 to 35 wt % soft monomers is polymerized to produce a second polymer phase. Monomer composition I also comprises from 1 to 5 wt % of at least one monomer selected from ethylenically unsaturated sulfonic acids, phosphonic acids, phosphoric acids, carboxylic acids, carboxylic amides, carboxylic anhydrides and mixtures thereof and 1 to 7.5 wt % of ethylenically unsaturated monomers containing keto groups. The weight ratio of monomer composition I to monomer composition II ranges from 50:50 to 65:35 and the polymer dispersion also contains a water-soluble cross-linking component selected from polyfunctional carboxylic hydrazides and/or polyfunctional amines.

    POLYMER DISPERSIONS
    3.
    发明申请
    POLYMER DISPERSIONS 有权
    聚合物分散剂

    公开(公告)号：US20160145430A1

    公开(公告)日：2016-05-26

    申请号：US14948791

    申请日：2015-11-23

    申请人： CELANESE INTERNATIONAL CORPORATION

    发明人： Matthias Junk ,  Ulrich Desor

    IPC分类号： C08L33/12 ,  C08J3/12 ,  C09D133/12

    CPC分类号： C08L33/12 ,  C08F2/001 ,  C08F220/18 ,  C08F265/06 ,  C08J3/12 ,  C08J2333/12 ,  C08L2201/54 ,  C08L2205/025 ,  C08L2308/00 ,  C09D5/02 ,  C09D133/12 ,  C09D151/003 ,  C08F2220/1825 ,  C08F220/14 ,  C08F220/58 ,  C08F220/06 ,  C08F220/68

    摘要： A polymer dispersion is produced by polymerization of at least two different ethylenically unsaturated monomers in at least first and second stages. The polymer produced in the first stage comprises 25 to 60% by weight of the total monomer composition and has a uniform glass transition temperature from −30° C. to 0° C. The polymer produced in the second stage comprises 40 to 75% by weight of the total monomer composition and has a variable monomer composition such that the second stage polymer has a non-uniform glass transition temperature which varies between a first value from −30° to +10° C. and second value of at least +70° C. Any polymer produced in further polymerization stages comprises no more than 10% by weight of the total monomer composition and the glass transition temperature of the hypothetical uniform copolymer produced by the total monomer composition is in the range from 0° C. to 25° C.

    摘要翻译： 聚合物分散体通过在至少第一和第二阶段中聚合至少两种不同的烯属不饱和单体来制备。 在第一阶段中生产的聚合物包含总单体组合物的25至60重量％，并且具有从-30℃至0℃的均匀玻璃化转变温度。在第二阶段中生产的聚合物包含40至75％ 总单体组合物的重量，并且具有可变的单体组成，使得第二级聚合物具有在-30°至+ 10°C的第一值之间变化的不均匀的玻璃化转变温度，并且第二值至少为+70 在另外的聚合阶段中产生的任何聚合物包含不超过总单体组合物的10重量％，并且由总单体组成产生的假想均匀共聚物的玻璃化转变温度在0℃至25℃的范围内 C。

    Biocide- and ammonia-free polymer dispersions
    4.
    发明授权
    Biocide- and ammonia-free polymer dispersions 有权

    公开(公告)号：US11608441B2

    公开(公告)日：2023-03-21

    申请号：US16766614

    申请日：2017-11-29

    申请人： CELANESE INTERNATIONAL CORPORATION

    发明人： Matthias Junk ,  Thomas Fichtner

    IPC分类号： C09D133/08 ,  C08F220/18 ,  C08L33/08 ,  C09D5/02

    摘要： A biocide- and ammonia-free aqueous polymer dispersion is obtained by radically initiated multi-stage emulsion polymerization and comprising particles comprising at least a first polymer phase formed from a monomer composition I and a second polymer phase from a different monomer composition II. The first polymer phase has a glass transition temperature below 20° C., and the second polymer phase has a glass transition temperature above 20° C., both as determined by differential scanning calorimetry according to ISO 16805. The polymer dispersion further comprises at least one water-soluble alkali metal silicate, at least one water-soluble alkali metal or alkaline earth metal alkyl siliconate, or a mixture thereof and has a pH of 10.0 or higher.

    Polymer dispersions, their preparation and use
    5.
    发明授权
    Polymer dispersions, their preparation and use 有权

    公开(公告)号：US11440978B2

    公开(公告)日：2022-09-13

    申请号：US17250136

    申请日：2019-05-30

    申请人： CELANESE INTERNATIONAL CORPORATION

    发明人： Kerstin Wenzel ,  Matthias Junk ,  Thomas Fichtner ,  Stephan Krieger

    IPC分类号： C08K3/013 ,  C08F220/06 ,  C08F2/22 ,  C08F218/08 ,  C08F218/10 ,  C08F220/14 ,  C08F230/08 ,  C08F220/18 ,  C08F2/00 ,  C09D5/02

    摘要： A multistage emulsion polymerization process comprises polymerizing a first monomer composition comprising from 50 to 95 weight percent of vinyl acetate, from 5 to 40 weight percent of at least one vinyl ester of a C5 to C18 unsaturated carboxylic acid, and optionally up to 40 weight percent of ethylene, all based on the total weight of monomers in the first monomer composition, to produce a first stage polymer. A second monomer composition comprising 40 to 89.95 weight percent of at least one ester of methacrylic acid or a vinyl aromatic monomer, 10 to 59.95 weight percent of at least one ester of acrylic acid, and from 0.05 to 10 weight percent of at least one comonomer with acid functionality, based on the total weight of monomers in the second monomer composition, is then polymerized in the presence of the first stage polymer to produce a second stage polymer.