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    PREPARATION OF A COATINGS FORMULATION WITH ALKALI SWELLABLE POLYMER PARTICLES
    1.
    发明申请
    PREPARATION OF A COATINGS FORMULATION WITH ALKALI SWELLABLE POLYMER PARTICLES 审中-公开

    公开(公告)号：US20200299527A1

    公开(公告)日：2020-09-24

    申请号：US16607257

    申请日：2018-05-02

    Applicant: Dow Global Technologies LLC ,  Rohm and Haas Company

    Inventor： James K. Bardman ,  Jonathan DeRocher ,  Andrew Hejl ,  Antony K. Van Dyk ,  Lin Wang ,  Kimy Yeung

    IPC: C09D7/65 ,  C09D7/40 ,  C08F220/06 ,  C08F220/18 ,  C08F220/14 ,  C08F212/08 ,  C08F2/22 ,  C08L25/14 ,  C08K3/22

    Abstract: The present invention relates to a process for preparing a coatings composition with an open time additive comprising the steps of a) contacting an aqueous dispersion of alkali swellable polymer particles with a rheology modifier and a binder to form a coatings composition with a VOC of less than 50 g/L; and b) neutralizing the alkali swellable particles with a non-volatile base after or upon contact with the rheology modifier and the binder to form swelled multi-staged polymer particles; wherein the alkali swellable polymer particles comprise a shell having a Tg of not greater than 25° C. and an acid functionalized core; and wherein the core-to-shell ratio is in the range of from 1:3.2 to 1:10. The composition arising from the process of the present invention is useful for improving open time, especially for low VOC coatings applications.In another aspect the present invention relates to the preparation of the coatings composition with an open time additive comprising the steps of a) contacting the open time additive with a rheology modifier and a binder to form a coatings composition with a VOC of less than 50 g/L, then b) neutralizing the open time additive to form swelled multi-staged polymer particles, wherein the coatings composition with the open time additive exhibits less than a 50% increase in viscosity than the coating composition without the open time additive.

    Aqueous dispersion of mutlistage polymer particles
    5.
    发明授权
    Aqueous dispersion of mutlistage polymer particles 有权

    公开(公告)号：US11124656B2

    公开(公告)日：2021-09-21

    申请号：US16511061

    申请日：2019-07-15

    Applicant: Rohm and Haas Company

    Inventor： Jonathan DeRocher ,  Andrew Hejl ,  Jessica Levin ,  John J. Rabasco ,  Antony K. Van Dyk ,  Kimy Yeung

    IPC: C09D4/06 ,  C09D133/10 ,  C09D7/65

    Abstract: The present invention relates to a composition comprising an aqueous dispersion of multistage polymer particles with a first phase comprising structural units of a carboxylic acid monomer and a nonionic ethylenically unsaturated monomer; and a second phase with a calculated Tg of less than 50° C. and comprising a mixture of polymers which together comprise structural units of styrene or methyl methacrylate or both; structural units of one or of n-butyl acrylate, 2-ethylhexyl acrylate, ethyl acrylate, or n-butyl methacrylate; and structural units of a carboxylic acid monomer. The composition is useful as an open time additive in coatings formulations.

    AQUEOUS DISPERSION OF MUTLISTAGE POLYMER PARTICLES
    9.
    发明申请
    AQUEOUS DISPERSION OF MUTLISTAGE POLYMER PARTICLES 审中-公开

    公开(公告)号：US20200024458A1

    公开(公告)日：2020-01-23

    申请号：US16511061

    申请日：2019-07-15

    Applicant: Rohm and Haas Company

    Inventor： Jonathan DeRocher ,  Andrew Hejl ,  Jessica Levin ,  John J. Rabasco ,  Antony K. Van Dyk ,  Kimy Yeung

    IPC: C09D4/06 ,  C09D133/10 ,  C09D7/65

    Abstract: The present invention relates to a composition comprising an aqueous dispersion of multistage polymer particles with a first phase comprising structural units of a carboxylic acid monomer and a nonionic ethylenically unsaturated monomer; and a second phase with a calculated Tg of less than 50° C. and comprising a mixture of polymers which together comprise structural units of styrene or methyl methacrylate or both; structural units of one or of n-butyl acrylate, 2-ethylhexyl acrylate, ethyl acrylate, or n-butyl methacrylate; and structural units of a carboxylic acid monomer. The composition is useful as an open time additive in coatings formulations.

    PROCESS FOR PREPARING AN AQUEOUS DISPERSION OF MULTISTAGE POLYMER PARTICLES
    10.
    发明申请
    PROCESS FOR PREPARING AN AQUEOUS DISPERSION OF MULTISTAGE POLYMER PARTICLES 审中-公开

    公开(公告)号：US20200024440A1

    公开(公告)日：2020-01-23

    申请号：US16511069

    申请日：2019-07-15

    Applicant: Rohm and Haas Company

    Inventor： Jonathan DeRocher ,  Andrew Hejl ,  Jessica Levin ,  John J. Rabasco ,  Antony K. Van Dyk ,  Kimy Yeung

    IPC: C08L33/12 ,  C09D7/65 ,  C09D5/14

    Abstract: The present invention relates to a process for preparing an aqueous dispersion of neutralized multistage polymer particles comprising the steps of:1) contacting under emulsion polymerization conditions a) a aqueous dispersion of first polymer particles comprising structural units of a carboxylic acid monomer, and structural units of a nonionic monomer with b) first monomers comprising styrene or methyl methacrylate or a combination thereof, and a carboxylic acid monomer; to form an aqueous dispersion of 2-stage polymer particles; then2) contacting under emulsion polymerization conditions the aqueous dispersion of first multistage polymer particles with second monomers comprising a) methyl methacrylate; b) n-butyl acrylate, 2-ethylhexyl acrylate, ethyl acrylate, or n-butyl methacrylate, or a combination thereof; c) a carboxylic acid monomer; and d) less than 20 weight percent styrene, to form an unneutralized aqueous dispersion of 3-stage polymer particles; then3) neutralizing the unneutralized aqueous dispersion of 3-stage polymer particles with a base to form an aqueous dispersion of neutralized 3-stage polymer particles, wherein the first and second monomers form a shell having a calculated Tg of less than 50° C.The process of the present invention is useful in preparing a composition that is useful as an open time additive in coatings formulations.

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