公开(公告)号：US10968342B2

公开(公告)日：2021-04-06

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 ,  C08F212/08 ,  C08F285/00 ,  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 contacting under emulsion polymerization conditions a) an aqueous dispersion of first polymer particles with b) first monomers to form an aqueous dispersion of 2-stage polymer particles; then contacting under emulsion polymerization conditions the aqueous dispersion of 2-stage polymer particles with second monomers comprising to form an unneutralized aqueous dispersion of 3-stage polymer particles; then 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.

公开(公告)号：US10800932B2

公开(公告)日：2020-10-13

申请号：US16254723

申请日：2019-01-23

Applicant: Dow Global Technologies LLC ,  Rohm and Haas Company

Inventor： John J. Rabasco ,  Duane R. Romer ,  Joey W. Storer ,  Antony K. Van Dyk ,  Wenqin Wang ,  Mark Langille ,  Jessica Levin

IPC: C09D7/43 ,  C09D7/65 ,  C09D133/00 ,  C09D7/00

Abstract: The present invention relates to a composition comprising a) an aqueous dispersion of polymer particles and b) a hydrophobically modified poly(oxyalkylene-urethane) rheology modifier having a 1) backbone; and 2) a hydrophobic portion represented by Fragment I: where R and R1 are defined herein. The composition is useful as an aqueous coating formulation that exhibits a highly shear thinning rheology profile suitable for spray applications to provide high sag resistance without adverse impact on gloss or corrosion resistance.

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.

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.

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.

公开(公告)号：US20190233663A1

公开(公告)日：2019-08-01

申请号：US16254723

申请日：2019-01-23

Applicant: Dow Global Technologies LLC ,  Rohm and Haas Company

Inventor： John J. Rabasco ,  Duane R. Romer ,  Joey W. Storer ,  Antony K. Van Dyk ,  Wenqin Wang ,  Mark Langille ,  Jessica Levin

IPC: C09D7/43 ,  C09D133/00 ,  C09D7/65

Abstract: The present invention relates to a composition comprising a) an aqueous dispersion of polymer particles and b) a hydrophobically modified poly(oxyalkylene-urethane) rheology modifier having a 1) backbone; and 2) a hydrophobic portion represented by Fragment I: —O—R—SR1mH   I where R and R1 are defined herein. The composition is useful as an aqueous coating formulation that exhibits a highly shear thinning rheology profile suitable for spray applications to provide high sag resistance without adverse impact on gloss or corrosion resistance.