Patents by Inventor David S. Laitar

David S. Laitar 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: 9896542
    Abstract: A method of producing a high primary hydroxyl group content and a high number average molecular weight polyol includes preparing a mixture that includes a double metal cyanide catalyst and a low molecular weight polyether polyol having a number average molecular weight of less than 1,000 g/mol, the polyether polyol is derived from propylene oxide, ethylene oxide, or butylene oxide, setting the mixture to having a first temperature, adding at least one selected from propylene oxide, ethylene oxide, and butylene oxide to the mixture at the first temperature, allowing the mixture to react to form a reacted mixture, adding a Lewis acid catalyst to the reacted mixture, setting the reaction mixture including the second catalyst to have a second temperature that is less than the first temperature, and adding additional at least one selected from propylene oxide, ethylene oxide, and butylene oxide to the reacted mixture at the second temperature such that a resultant polyol having a primary hydroxyl group content of
    Type: Grant
    Filed: October 19, 2015
    Date of Patent: February 20, 2018
    Inventors: Arjun Raghuraman, Matthias Schaefer, Jean-Paul Masy, David S. Laitar
  • Patent number: 9869026
    Abstract: Electroless copper plating baths include alternative reducing agents to the conventional reducing agents currently used in the electroless plating industry. The electroless copper baths are stable and deposit a salmon bright copper deposit on substrates. Exclusion of many environmentally unfriendly conventional reducing agents enables environmentally friendly electroless copper plating baths.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: January 16, 2018
    Assignees: Rohm and Haas Electronic Materials LLC, Dow Global Technologies LLC
    Inventors: David S. Laitar, Crystal P. L. Li, Andy Lok-Fung Chow
  • Publication number: 20170240702
    Abstract: A method of producing a high primary hydroxyl group content and a high number average molecular weight polyol includes preparing a mixture that includes a double metal cyanide catalyst and a low molecular weight polyether polyol having a number average molecular weight of less than 1,000 g/mol, the polyether polyol is derived from propylene oxide, ethylene oxide, or butylene oxide, setting the mixture to having a first temperature, adding at least one selected from propylene oxide, ethylene oxide, and butylene oxide to the mixture at the first temperature, allowing the mixture to react to form a reacted mixture, adding a Lewis acid catalyst to the reacted mixture, setting the reaction mixture including the second catalyst to have a second temperature that is less than the first temperature, and adding additional at least one selected from propylene oxide, ethylene oxide, and butylene oxide to the reacted mixture at the second temperature such that a resultant polyol having a primary hydroxyl group content of
    Type: Application
    Filed: October 19, 2015
    Publication date: August 24, 2017
    Inventors: Arjun Raghuraman, Matthias Schaefer, Jean-Paul Masy, David S. Laitar
  • Publication number: 20170229670
    Abstract: The invention provides compositions comprising copper(I) pyrazolate dimer compounds for use in OLEDs applications. The inventive compositions can be used to generate visible light colors or a color blend in electronic devices.
    Type: Application
    Filed: October 6, 2015
    Publication date: August 10, 2017
    Applicant: Dow Global Technologies LLC
    Inventors: David S. Laitar, Thomas P. Clark, Aaron A. Rachford, Sukrit Mukhopadhyay, Timothy S. De Vries, David D. Devore
  • Patent number: 9702046
    Abstract: Electroless copper plating baths include alternative reducing agents to the conventional reducing agents currently used in the electroless plating industry. The electroless copper baths are stable and deposit a salmon bright copper deposit on substrates. Exclusion of many environmentally unfriendly conventional reducing agents enables environmentally friendly electroless copper plating baths.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: July 11, 2017
    Assignees: Dow Global Technologies LLC, Rohm and Haas Electronic Materials LLC
    Inventors: David S. Laitar, Crystal P. L. Li, Andy Lok-Fung Chow
  • Publication number: 20170101506
    Abstract: Alkylene oxide polymerizations are performed in the presence of a double metal cyanide polymerization catalyst and certain magnesium, Group 3-Group 15 metal or lanthanide series metal compounds. The presence of the magnesium, Group 3-Group 15 metal or lanthanide series metal compound provides several benefits including more rapid catalyst activation, faster polymerization rates and the reduction in the amount of ultra high molecular weight polymers that are formed. The catalyst mixture is unexpectedly useful in making polyethers having low equivalent weights.
    Type: Application
    Filed: December 16, 2016
    Publication date: April 13, 2017
    Inventors: David S. Laitar, David A. Babb, Carlos M. Villa, Richard Keaton, Jean-Paul Masy
  • Patent number: 9556309
    Abstract: Alkylene oxide polymerizations are performed in the presence of a double metal cyanide polymerization catalyst and certain magnesium, Group 3-Group 15 metal or lanthanide series metal compounds. The presence of the magnesium, Group 3-Group 15 metal or lanthanide series metal compound provides several benefits including more rapid catalyst activation, faster polymerization rates and the reduction in the amount of ultra high molecular weight polymers that are formed. The catalyst mixture is unexpectedly useful in making polyethers having low equivalent weights.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: January 31, 2017
    Assignee: Dow Global Technologies LLC
    Inventors: David S. Laitar, David A. Babb, Carlos M. Villa, Richard Keaton, Jean-Paul Masy
  • Patent number: 9512053
    Abstract: Processes for the production of chlorinated propenes are provided. The processes make use of 1,2-dichloropropane as a starting material and subject a feedstream comprising the same to an ionic chlorination process. At least a portion of any tri- and tetrachlorinated propanes not amenable to ionic chlorination conditions are removed from the ionic chlorination product stream, or, are subjected to chemical base dehydrochlorination step. In this way, recycle of intermediates not amenable to ionic chlorination reactions is reduced or avoided, as is the buildup of these intermediates within the process. Selectivity and, in some embodiments, yield of the process is thus enhanced.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: December 6, 2016
    Assignee: BLUE CUBE IP LLC
    Inventors: Max M. Tirtowidjojo, David S. Laitar, Barry B. Fish, Matthew L. Grandbois
  • Patent number: 9475739
    Abstract: Processes for the production of chlorinated propenes are provided. The present processes make use of a feedstock comprising 1,2,3-trichloropropane and chlorinates the 1,1,2,3-tetrachloropropane generated by the process prior to a dehydrochlorination step. Production of the less desirable pentachloropropane isomer, 1,1,2,3,3-pentachloropropane, is thus minimized. The present processes provide better reaction yield as compared to conventional processes that require dehydrochlorination of 1,1,2,3-tetrachloropropane prior to chlorinating the same. The present process can also generate anhydrous HCl as a byproduct that can be removed from the process and used as a feedstock for other processes, while limiting the production of waste water, thus providing further time and cost savings.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: October 25, 2016
    Assignee: BLUE CUBE IP LLC
    Inventors: Max M. Tirtowidjojo, Barry B. Fish, David S. Laitar
  • Patent number: 9475740
    Abstract: Processes for the production of chlorinated propenes are provided. The present processes make use of 1,2-dichloropropane, a by-product in the production of chlorohydrin, as a low cost starting material. 1,1,1,2,2-pentachloropropane produced by the process is subjected to catalytic dehydrochlorination and build-up of the same within the process is avoided.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: October 25, 2016
    Assignee: BLUE CUBE IP LLC
    Inventors: Max M. Tirtowidjojo, David S. Laitar, Barry B. Fish, William J. Kruper, Jr.
  • Patent number: 9440923
    Abstract: 4,5,6-Trichloropicolinic acid is prepared by selectively dechlorinating 3,4,5,6-tetrachloropicolinic acid with zinc and a catalyst prepared from a nickel compound and a bidentate ligand in a polar solvent.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: September 13, 2016
    Assignee: Dow AgroSciences LLC
    Inventors: Matthew L. Grandbois, David S. Laitar, James M. Renga, Gregory T. Whiteker
  • Patent number: 9403741
    Abstract: Processes for the production of chlorinated alkanes are provided. The present processes comprise dehydrochlorinating one or more trichloroalkanes having from 3-6 carbon atoms and vicinal chlorine atoms, followed by a series of sequential chlorination and/or further dehydrochlorination steps. Because the trichloroalkane is first dehydrochlorinated, rather than being first chlorinated, greater specificity to desired tetra- and pentachloroalkanes can be seen.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: August 2, 2016
    Assignee: BLUE CUBE IP LLC
    Inventors: Max M. Tirtowidjojo, David S. Laitar, Matthew L. Grandbois, William J. Kruper, Jr., Edward M. Calverley
  • Publication number: 20160122876
    Abstract: Electroless copper plating baths include alternative reducing agents to the conventional reducing agents currently used in the electroless plating industry. The electroless copper baths are stable and deposit a salmon bright copper deposit on substrates. Exclusion of many environmentally unfriendly conventional reducing agents enables environmentally friendly electroless copper plating baths.
    Type: Application
    Filed: January 12, 2016
    Publication date: May 5, 2016
    Inventors: David S. LAITAR, Crystal P. L. LI, Andy Lok-Fung CHOW
  • Publication number: 20160039760
    Abstract: 4,5,6-Trichloropicolinic acid is prepared by selectively dechlorinating 3,4,5,6-tetrachloropicolinic acid with zinc and a catalyst prepared from a nickel compound and a bidentate ligand in a polar solvent.
    Type: Application
    Filed: August 5, 2015
    Publication date: February 11, 2016
    Applicant: Dow AgroSciences LLC
    Inventors: Matthew L. Grandbois, David S. Laitar, James M. Renga, Gregory T. Whiteker
  • Publication number: 20160023967
    Abstract: Processes for the production of chlorinated alkanes are provided. The present processes comprise dehydrochlorinating one or more trichloroalkanes having from 3-6 carbon atoms and vicinal chlorine atoms, followed by a series of sequential chlorination and/or further dehydrochlorination steps. Because the trichloroalkane is first dehydrochlorinated, rather than being first chlorinated, greater specificity to desired tetra- and pentachloroalkanes can be seen.
    Type: Application
    Filed: March 7, 2014
    Publication date: January 28, 2016
    Applicant: BLUE CUBE IP LLC
    Inventors: Max M. TIRTOWIDJOJO, David S. LAITAR, Matthew L. GRANDBOIS, William J. KRUPER, Jr., Edward M. CALVERLEY
  • Publication number: 20160017498
    Abstract: Electroless copper plating baths include alternative reducing agents to the conventional reducing agents currently used in the electroless plating industry. The electroless copper baths are stable and deposit a salmon bright copper deposit on substrates. Exclusion of many environmentally unfriendly conventional reducing agents enables environmentally friendly electroless copper plating baths.
    Type: Application
    Filed: July 15, 2014
    Publication date: January 21, 2016
    Inventors: David S. LAITAR, Crystal P. L. LI, Andy Lok-Fung CHOW
  • Patent number: 9233896
    Abstract: Processes for the production of chlorinated propenes are provided wherein a dehydrochlorination reaction occurs prior to a first chlorination reaction. The present processes make use of at least one reactor twice, i.e., at least two reactions occur in the same reactor. Cost and time savings are thus provided. Additional savings can be achieved by conducting more than two chlorination reactions, or all chlorination reactions, in one chlorination reactor, and/or by conducting more than two dehydrochlorination reactions, or all dehydrochlorination reactions, within a single dehydrochlorination reactor.
    Type: Grant
    Filed: August 4, 2012
    Date of Patent: January 12, 2016
    Assignee: Blue Cube IP LLC
    Inventors: Max M. Tirtowidjojo, Barry B. Fish, David S. Laitar
  • Publication number: 20160002127
    Abstract: Processes for the production of chlorinated propanes are provided. The processes comprise catalyzing the chlorination of 1,1,1,3-tetrachloropropane with aluminum chloride, either alone or in combination with ferric chloride. Low intensity conditions are appropriate for the process, e.g., temperatures of from ambient to 100° C. and pressures of from ambient to 200 psig may be used. Even though low intensity conditions are used, the aluminum chloride provides at least 1.5 times greater the conversion rate and/or productivity of 1,1,1,3-tetrachloropropane as compared to ferric chloride when used as a single catalyst under similar processing conditions.
    Type: Application
    Filed: February 28, 2014
    Publication date: January 7, 2016
    Applicant: Blue Cube IP LLC
    Inventors: Max M. TIRTOWIDJOJO, David S. LAITAR
  • Publication number: 20150344386
    Abstract: Processes for the production of chlorinated propenes are provided. The processes make use of 1,2-dichloropropane as a starting material and subject a feedstream comprising the same to an ionic chlorination process. At least a portion of any tri- and tetrachlorinated propanes not amenable to ionic chlorination conditions are removed from the ionic chlorination product stream, or, are subjected to chemical base dehydrochlorination step. In this way, recycle of intermediates not amenable to ionic chlorination reactions is reduced or avoided, as is the buildup of these intermediates within the process. Selectivity and, in some embodiments, yield of the process is thus enhanced.
    Type: Application
    Filed: December 18, 2013
    Publication date: December 3, 2015
    Applicant: DOW GLOBAL TECHNOLOGIES LLC
    Inventors: MAX M. TIRTOWIDJOJO, DAVID S. LAITAR, BARRY B. FISH, MATTHEW L. GRANDBOIS
  • Publication number: 20150344387
    Abstract: Processes for the production of chlorinated propenes are provided. The present processes make use of 1,2-dichloropropane, a by-product in the production of chlorohydrin, as a low cost starting material. 1,1,1,2,2-pentachloropropane produced by the process is subjected to catalytic dehydrochlorination and build-up of the same within the process is avoided.
    Type: Application
    Filed: December 17, 2013
    Publication date: December 3, 2015
    Applicant: DOW GLOBAL TECHNOLOGIES LLC
    Inventors: MAX M. TIRTOWIDJOJO, DAVID S. LAITAR, BARRY B. FISH, WILLIAM J. KRUPER, Jr.