Patents by Inventor Thomas L. Tomczak

Thomas L. Tomczak has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11746195
    Abstract: The present disclosure provides a process including providing a polyolefin aqueous dispersion having (50) to (90) wt % solids content of dispersion, the polyolefin aqueous dispersion containing solid particles containing a polyolefin including an ethylene-based polymer having a melting temperature from greater than (115)° C. to (140)° C., polyolefin wax, acrylic dispersant; and an aqueous phase including excess acrylic dispersant; adding diluting water to form a diluted polyolefin aqueous dispersion having (5) to less than (50) wt % solids content; collecting the solid particles; washing the solid particles with a washing agent to remove the excess acrylic dispersant; and removing the washing agent to form a powder having a mean volume average particle size from (10) to (300) ?m, a sphericity from (0.92) to (1.0), a particle size distribution from (1) to less than (2), a particle density from (98)% to (100)%, and a flow rate in a large funnel from (1) to (5) seconds.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: September 5, 2023
    Inventors: Craig F. Gorin, Sanjib Biswas, Yi Fan, Thomas L. Tomczak, Daniel L. Dermody, Harpreet Singh
  • Patent number: 11000972
    Abstract: The present disclosure provides a process. The process includes (i) melt blending, in an extruder, (a) a polyolefin phase and (b) an aqueous phase in the presence of (c) at least one dispersant selected from an acrylic dispersant, a poloxamer dispersant, and combinations thereof; (ii) producing an interfacial tension from 0.1 dynes/cm to 25 dynes/cm; (iii) forming a polyolefin aqueous dispersion having from 25 wt % to 90 wt % solids content of dispersion; and (iv) removing the water from the polyolefin aqueous dispersion to form a powder. The powder has a mean volume average particle size from 10 ?m to 300 ?m, a sphericity from 0.92 to 1.0, a particle size distribution from 1 to less than 2, and a particle density from 98% to 100%.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: May 11, 2021
    Assignees: Dow Global Technologies LLC, Rohm and Haas Company
    Inventors: Craig F. Gorin, Sanjib Biswas, Manesh Nadupparambil Sekharan, Thomas L. Tomczak, Robert S. Moglia, Daniel L. Dermody, Harpreet Singh, Bryan L. McCulloch
  • Publication number: 20200339763
    Abstract: The present disclosure provides a process including providing a polyolefin aqueous dispersion having (50) to (90) wt % solids content of dispersion, the polyolefin aqueous dispersion containing solid particles containing a polyolefin including an ethylene-based polymer having a melting temperature from greater than (115)° C. to (140)° C., polyolefin wax, acrylic dispersant; and an aqueous phase including excess acrylic dispersant; adding diluting water to form a diluted polyolefin aqueous dispersion having (5) to less than (50) wt % solids content; collecting the solid particles; washing the solid particles with a washing agent to remove the excess acrylic dispersant; and removing the washing agent to form a powder having a mean volume average particle size from (10) to (300) ?m, a sphericity from (0.92) to (1.0), a particle size distribution from (1) to less than (2), a particle density from (98)% to (100)%, and a flow rate in a large funnel from (1) to (5) seconds.
    Type: Application
    Filed: October 22, 2018
    Publication date: October 29, 2020
    Inventors: Craig F. Gorin, Sanjib Biswas, Yi Fan, Thomas L. Tomczak, Daniel L. Dermody, Harpreet Singh
  • Publication number: 20200247010
    Abstract: The present disclosure provides a process. The process includes (i) melt blending, in an extruder, (a) a polyolefin phase and (b) an aqueous phase in the presence of (c) at least one dispersant selected from an acrylic dispersant, a poloxamer dispersant, and combinations thereof; (ii) producing an interfacial tension from 0.1 dynes/cm to 25 dynes/cm; (iii) forming a polyolefin aqueous dispersion having from 25 wt % to 90 wt % solids content of dispersion; and (iv) removing the water from the polyolefin aqueous dispersion to form a powder. The powder has a mean volume average particle size from 10 ?m to 300 ?m, a sphericity from 0.92 to 1.0, a particle size distribution from 1 to less than 2, and a particle density from 98% to 100%.
    Type: Application
    Filed: October 22, 2018
    Publication date: August 6, 2020
    Inventors: Craig F. Gorin, Sanjib Biswas, Manesh Nadupparambil Sekharan, Thomas L. Tomczak, Robert S. Moglia, Daniel L. Dermody, Harpreet Singh, Bryan L. McCulloch
  • Patent number: 9579617
    Abstract: A composition is provided comprising dispersed particles in an aqueous medium, wherein said dispersed particles comprise fatty amide and one or more fatty acid, wherein 50 mole % or more of said fatty acid in is the carboxylate form, and wherein the weight ratio of said fatty amide to said fatty acid is from 0.12:1 to 2.3:1. Also provided is method of making that composition, comprising the step of applying shear to a mixture that comprises said fatty amide, said fatty acid, and water, wherein said applying shear is performed at a temperature above 59° C., and wherein the amount of water in said mixture is 70% or less by weight based on the weight of said mixture.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: February 28, 2017
    Assignees: DOW GLOBAL TECHNOLOGIES LLC, ROHM AND HAAS COMPANY
    Inventors: Mechelle Ann Churchfield, Timothy J. Young, Mai Chen, Thomas L. Tomczak
  • Publication number: 20150352509
    Abstract: A composition is provided comprising dispersed particles in an aqueous medium, wherein said dispersed particles comprise fatty amide and one or more fatty acid, wherein 50 mole % or more of said fatty acid in is the carboxylate form, and wherein the weight ratio of said fatty amide to said fatty acid is from 0.12:1 to 2.3:1. Also provided is method of making that composition, comprising the step of applying shear to a mixture that comprises said fatty amide, said fatty acid, and water, wherein said applying shear is performed at a temperature above 59° C., and wherein the amount of water in said mixture is 70% or less by weight based on the weight of said mixture.
    Type: Application
    Filed: December 5, 2013
    Publication date: December 10, 2015
    Applicants: DOW GLOBAL TECHNOLOGIES LLC, ROHM AND HAAS COMPANY
    Inventors: Mechelle Ann Churchfield, Timothy J. Young, Mai Chen, Thomas L. Tomczak