Patents by Inventor Ivan G. Hargis

Ivan G. Hargis 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: 5294663
    Abstract: The present invention provides an emulsion polymerization synthetic isoprene-styrene/butadiene rubber for use in improved tire tread compositions is provided. The improved composition is a blend of a 1,4 cis-polyisoprene such as natural rubber and a synthetic rubber produced by emulsion polymerization which synthetic rubber includes isoprene and either styrene or butadiene or both styrene and butadiene. The tire tread composition has an excellent balance of good wear resistance and low rolling resistance as well as a low T.sub.g and good traction. These improved qualities for tire tread compositions have heretofore been unavailable in rubbers utilizing emulsion polymers, and have been achievable only with tire compositions including synthetic rubbers that are produced by solution polymerization.
    Type: Grant
    Filed: August 28, 1992
    Date of Patent: March 15, 1994
    Assignee: General Tire, Inc.
    Inventors: Hubert J. Fabris, Ivan G. Hargis, Russell A. Livigni, Richard M. Wise
  • Patent number: 4670502
    Abstract: Rubbery high trans-high vinyl diblock copolymers, blends of rubbery high trans copolymers and rubbery high vinyl polymers, and mixtures (alloys or blends) of said diblock copolymers, high trans copolymers and high vinyl polymers are useful in producing tire treads exhibiting good processibility, good rolling resistance, skid resistance and abrasion resistance. The high trans block or copolymer comprises a copolymer of butadiene-1,3 and styrene and/or isoprene and the high vinyl block or polymer comprises polybutadiene or copolymers of butadiene and styrene and/or isoprene. These di-block copolymers, copolymers and polymers are made by solution polymerization. The diblock copolymer may be made by copolymerizing butadiene and styrene and/or isoprene using a Ba, Ca or Sr alcoholate, R.sub.2 Mg and R.sub.
    Type: Grant
    Filed: April 7, 1986
    Date of Patent: June 2, 1987
    Assignee: GenCorp Inc.
    Inventors: Ivan G. Hargis, Hubert J. Fabris, Russell A. Livigni, Sundar L. Aggarwal, George B. Thomas, John A. Wilson
  • Patent number: 4669518
    Abstract: Rubbery high trans-high vinyl diblock copolymers, blends of rubbery high trans copolymers and rubbery high vinyl polymers, and mixtures (alloys or blends) of said diblock copolymers, high trans copolymers and high vinyl polymers are useful in producing tire treads exhibiting good processibility, good rolling resistance, skid resistance and abrasion resistance. The high trans block or copolymer comprises a copolymer of butadiene-1,3 and styrene and/or isoprene and the high vinyl block or polymer comprises polybutadiene or copolymers of butadiene and styrene and/or isoprene. These di-block copolymers, copolymers and polymers are made by solution polymerization. The diblock copolymer may be made by copolymerizing butadiene and styrene and/or isoprene using a Ba, Ca or Sr alcoholate, R.sub.2 Mg and R.sub.
    Type: Grant
    Filed: April 7, 1986
    Date of Patent: June 2, 1987
    Assignee: GenCorp Inc.
    Inventors: Ivan G. Hargis, Hubert J. Fabris, Russell A. Livigni, Sundar L. Aggarwal, George B. Thomas, John A. Wilson
  • Patent number: 4616065
    Abstract: Rubbery high trans-high vinyl diblock copolymers, blends of rubbery high trans copolymers and rubbery high vinyl polymers, and mixtures (alloys or blends) of said diblock copolymers, high trans copolymers and high vinyl polymers are useful in producing tire treads exhibiting good processibility, good rolling resistance, skid resistance and abrasion resistance. The high trans block or copolymer comprises a copolymer of butadiene-1,3 and styrene and/or isoprene and the high vinyl block or polymer comprises polybutadiene or copolymers of butadiene and styrene and/or isoprene. These di-block copolymers, copolymers and polymers are made by solution polymerization. The diblock copolymer may be made by copolymerizing butadiene and styrene and/or isoprene using a Ba, Ca or Sr alcoholate, R.sub.2 Mg and R.sub.
    Type: Grant
    Filed: April 15, 1985
    Date of Patent: October 7, 1986
    Assignee: GenCorp Inc.
    Inventors: Ivan G. Hargis, Hubert J. Fabris, Russell A. Livigni, Sundar L. Aggarwal, George B. Thomas, John A. Wilson
  • Patent number: 4553578
    Abstract: A tire having a tread exhibiting substantial low rolling resistance, traction and wear comprises a cured compounded carbon black reinforced blend of (A) a star-shaped substantially random vinyl containing rubbery solution polymerized polymer selected from the group consisting of polybutadienes, polyisoprenes, butadiene-styrene copolymers, butadiene-isoprene copolymers, isoprene-styrene copolymers, butadiene-isoprene-styrene copolymers and mixtures of the same and (B) at least one other rubbery diene polymer.
    Type: Grant
    Filed: January 30, 1985
    Date of Patent: November 19, 1985
    Assignee: GenCorp Inc.
    Inventors: Francis J. Vitus, Ivan G. Hargis, Russell A. Livigni, Sundar L. Aggarwal
  • Patent number: 4503204
    Abstract: A composition useful as a catalyst in solution polymerization comprises (1) a barium, calcium and/or strontium alcoholate, (2) an organoaluminum compound and (3) an organomagnesium compound. (2) and (3) may be used as a complex with (1). The compositions can be used to polymerize ethylenically unsaturated monomers like butadiene, butadiene and styrene, and isoprene and heterocyclic monomers like oxiranes, thiiranes, siloxanes, thiatanes and lactams. The catalyst composition can produce polybutadienes and butadiene-styrene copolymers having a trans-1,4 content as high as 90%. The non-terminating features of the polymerization of this invention permit the preparation of functionally terminated butadiene based polymers and block polymers containing sufficient amounts of trans-1,4 butadiene units to crystallize.
    Type: Grant
    Filed: February 15, 1983
    Date of Patent: March 5, 1985
    Assignee: The General Tire & Rubber Company
    Inventors: Robert E. Bingham, Richard R. Durst, Hubert J. Fabris, Ivan G. Hargis, Russell A. Livigni, Sundar L. Aggarwal
  • Patent number: 4497748
    Abstract: Divinyl benzene and/or diisopropenyl benzene in hydrocarbon solvent is added over a period of time at low temperature to a hydrocarbon solvent containing a C.sub.2-20 normal, secondary or tertiary alkyl or cycloalkyl lithium compound and a tertiary alkylamine having 2-4 carbon atoms prepared at low temperature to provide an initiator having an average of from 4 to 9 C-Li sites and a VPO Mn of from about 750 to 4,000. These initiators are useful in polymerizing dienes and vinyl monomers to provide star polymers having an average of from about 4 to 9 arms or branches. These star polymers among other things are useful low profile or low shrink additives for FRPs, e.g., glass fiber reinforced plastics.
    Type: Grant
    Filed: September 22, 1982
    Date of Patent: February 5, 1985
    Assignee: The General Tire & Rubber Company
    Inventors: Francis J. Vitus, Ivan G. Hargis, Russell A. Livigni, Sundar L. Aggarwal
  • Patent number: 4426495
    Abstract: Divinyl benzene and/or diisopropenyl benzene in hydrocarbon solvent is added over a period of time at low temperature to a hydrocarbon solvent containing a C.sub.2-20 normal, secondary or tertiary alkyl or cycloalkyl lithium compound and a tertiary alkylamine having 2-4 carbon atoms prepared at low temperature to provide an initiator having an average of from 4 to 9 C-Li sites and a VPO Mn of from about 750 to 4,000. These initiators a re useful in polymerizing dienes and vinyl monomers to provide star polymers having an average of from about 4 to 9 arms or branches. These star polymers among other things are useful low profile or low shrink additives for FRPs, e.g., glass fiber reinforced plastics.
    Type: Grant
    Filed: September 22, 1982
    Date of Patent: January 17, 1984
    Assignee: The General Tire & Rubber Company
    Inventors: Francis J. Vitus, Ivan G. Hargis, Russell A. Livigni, Sundar L. Aggarwal
  • Patent number: 4409368
    Abstract: Divinyl benzene and/or diisopropenyl benzene in hydrocarbon solvent is added over a period of time at low temperature to a hydrocarbon solvent containing a C.sub.2-20 normal, secondary or tertiary alkyl or cycloalkyl lithium compound and a tertiary alkylamine having 2-4 carbon atoms prepared at low temperature to provide an initiator having an average of from 4 to 9 C-Li sites and a VPO Mn of from about 750 to 4,000. These initiators are useful in polymerizing dienes and vinyl monomers to provide star polymers having an average of from about 4 to 9 arms or branches. These star polymers among other things are useful low profile or low shrink additives of FRPs, e.g., glass fiber reinforced plastics.
    Type: Grant
    Filed: July 13, 1981
    Date of Patent: October 11, 1983
    Assignee: The General Tire & Rubber Company
    Inventors: Francis J. Vitus, Ivan G. Hargis, Russell A. Livigni, Sundar L. Aggarwal
  • Patent number: 4355156
    Abstract: A composition useful as a catalyst in solution polymerization comprises (1) a barium, calcium and/or strontium alcoholate, (2) an organoaluminum compound and (3) an organomagnesium compound. (2) and (3) may be used as a complex with (1). The compositions can be used to polymerize ethylenically unsaturated monomers like butadiene, butadiene and styrene, and isoprene and heterocyclic monomers like oxiranes, thiiranes, siloxanes, thiatanes and lactams. The catalyst composition can produce polybutadienes and butadiene-styrene copolymers having a trans-1,4 content as high as 90%. The non-terminating features of the polymerization of this invention permit the preparation of functionally terminated butadiene based polymers and block polymers containing sufficient amounts of trans-1,4 butadiene units to crystallize.
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: October 19, 1982
    Assignee: The General Tire & Rubber Company
    Inventors: Robert E. Bingham, Richard R. Durst, Hubert J. Fabris, Ivan G. Hargis, Russell A. Livigni, Sundar L. Aggarwal
  • Patent number: 4307218
    Abstract: A composition useful as a catalyst in solution polymerization comprises (1) a barium, calcium and/or strontium alcoholate, (2) an organoaluminum compound and (3) an organomagnesium compound. (2) and (3) may be used as a complex with (1). The compositions can be used to polymerize ethylenically unsaturated monomers like butadiene, butadiene and styrene, and isoprene and heterocyclic monomers like oxiranes, thiiranes, siloxanes, thiatanes and lactams. The catalyst composition can produce polybutadienes and butadiene-styrene copolymers having a trans-1,4 content as high as 90%. The non-terminating features of the polymerization of this invention permit the preparation of functionally terminated butadiene based polymers and block polymers containing sufficient amounts of trans-1,4 butadiene units to crystallize.
    Type: Grant
    Filed: August 15, 1980
    Date of Patent: December 22, 1981
    Assignee: The General Tire & Rubber Company
    Inventors: Robert E. Bingham, Richard R. Durst, Hubert J. Fabris, Ivan G. Hargis, Russell A. Livigni, Sundar L. Aggarwal
  • Patent number: 4302568
    Abstract: A composition useful as a catalyst in solution polymerization comprises (1) a barium, calcium and/or strontium alcoholate, (2) an organoaluminum compound and (3) an organomagnesium compound. (2) and (3) may be used as a complex with (1). The compositions can be used to polymerize ethylenically unsaturated monomers like butadiene, butadiene and styrene, and isoprene and heterocyclic monomers like oxiranes, thiiranes, siloxanes, thiatanes and lactams. The catalyst composition can produce polybutadienes and butadiene-styrene copolymers having a trans-1,4 content as high as 90%. The non-terminating features of the polymerization of this invention permit the preparation of functionally terminated butadiene based polymers and block polymers containing sufficient amounts of trans-1,4 butadiene units to crystallize.
    Type: Grant
    Filed: February 25, 1980
    Date of Patent: November 24, 1981
    Assignee: The General Tire & Rubber Co.
    Inventors: Robert E. Bingham, Richard R. Durst, Hubert J. Fabris, Ivan G. Hargis, Russell A. Livigni, Sundar L. Aggarwal
  • Patent number: 4297240
    Abstract: A composition useful as a catalyst in solution polymerization comprises (1) a barium, calcium and/or strontium alcoholate, (2) an organoaluminum compound and (3) an organomagnesium compound. (2) and (3) may be used as a complex with (1). The compositions can be used to polymerize ethylenically unsaturated monomers like butadiene, butadiene and styrene, and isoprene and heterocyclic monomers like oxiranes, thiiranes, siloxanes, thiatanes and lactams. The catalyst composition can product polybutadienes and butadiene-styrene copolymers having a trans-1,4 content as high as 90%. The non-terminating features of the polymerization of this invention permit the preparation of functionally terminated butadiene based polymers and block polymers containing sufficient amounts of trans-1,4 butadiene units to crystallize.
    Type: Grant
    Filed: August 15, 1980
    Date of Patent: October 27, 1981
    Assignee: The General Tire & Rubber Company
    Inventors: Robert E. Bingham, Richard R. Durst, Hubert J. Fabris, Ivan G. Hargis, Russell A. Livigni, Sundar L. Aggarwal
  • Patent number: 4279798
    Abstract: A block copolymer of polyalkalene oxide and a polydiene is made by the lithium catalyzed anionic polymerization of a diene followed by polymerization of an alkalene oxide using a double metal cyanide catalyst. The dispersant can be used in forming a crude oil methanol dispersion for transport through unheated pipelines from the North Slope oil fields to Prudhoe Bay.
    Type: Grant
    Filed: March 28, 1980
    Date of Patent: July 21, 1981
    Assignee: The General Tire & Rubber Company
    Inventors: Sundar L. Aggarwal, Ivan G. Hargis, Russell A. Livigni
  • Patent number: 4260712
    Abstract: The characteristics of barium t-alkoxide salts used with organolithium compounds as catalyst complexes in the solution polymerization of unsaturated or oxirane monomers to make polymers such as rubbers is improved by reducing or eliminating the nitrogen content of the barium salt and, further, by using a certain mixture of tertiary carbinols and water in forming the barium salt. In certain instances water may be eliminated.
    Type: Grant
    Filed: September 20, 1979
    Date of Patent: April 7, 1981
    Assignee: The General Tire & Rubber Company
    Inventors: Sundar L. Aggarwal, Ivan G. Hargis, Russell A. Livigni, Hubert J. Fabris
  • Patent number: 4260519
    Abstract: The characteristics of barium t-alkoxide salts used with organolithium compounds as catalyst complexes in the solution polymerization of unsaturated or oxirane monomers to make polymers such as rubbers is improved by reducing or eliminating the nitrogen content of the barium salt and, further, by using a certain mixture of tertiary carbinols and water in forming the barium salt. In certain instances water may be eliminated.
    Type: Grant
    Filed: April 22, 1980
    Date of Patent: April 7, 1981
    Assignee: The General Tire & Rubber Company
    Inventors: Sundar L. Aggarwal, Ivan G. Hargis, Russell A. Livigni, Hubert J. Fabris
  • Patent number: 3978161
    Abstract: Hydrocarbon polymers are readily metalated in solution in a hydrocarbon solvent with metallic sodium, potassium, rubidium and/or cesium utilizing a chelating polytertiary amine or a crown polyether.
    Type: Grant
    Filed: July 29, 1975
    Date of Patent: August 31, 1976
    Assignee: The General Tire & Rubber Company
    Inventors: Stuart D. Nielsen, Ivan G. Hargis, Russell A. Livigni