Patents by Inventor Leonid Rappoport

Leonid Rappoport 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: 9670324
    Abstract: A composition of the formulae MZAORSnR1F1mOAZ1M1, wherein O and S have their normal meaning of oxygen and sulfur, n is at least 2 and not more than 8, F1 is of the formula —OAORSnR1—, m is at least 1, Z and Z1 are the same or different and are oxy or amino, M and M1 are the same or different and are hydrogen or an organic substituent, R and R1 are the same or different and are organic divalent radicals, each having from 2 to 20 carbon atoms, and A is the residue of a dicarboxylic acid of from 2 to 40 carbon atoms.
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: June 6, 2017
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Leonid Rappoport, Aleksander Yam, Alexander Vainer
  • Publication number: 20160130401
    Abstract: A composition of the formulae MZAORSnR1F1mOAZ1M1, wherein O and S have their normal meaning of oxygen and sulfur, n is at least 2 and not more than 8, F1 is of the formula —OAORSnR1—, m is at least 1, Z and Z1 are the same or different and are oxy or amino, M and M1 are the same or different and are hydrogen or an organic substituent, R and R1 are the same or different and are organic divalent radicals, each having from 2 to 20 carbon atoms, and A is the residue of a dicarboxylic acid of from 2 to 40 carbon atoms.
    Type: Application
    Filed: January 13, 2016
    Publication date: May 12, 2016
    Inventors: Leonid RAPPOPORT, Aleksander YAM, Alexander VAINER
  • Patent number: 8889802
    Abstract: A composition comprising a reaction product of reactants comprising (a) a compound comprising (i) a polysulfide moiety and (ii) an oxygen atom in a ?-position to a sulfur link having the formula: where each R is independently selected from H or a C1 to C20 organyl group, R? is independently selected from a C1 to C20 organyl group, R?? is independently selected from H or a C1 to C20 organyl group, and x has an average of greater than 2, (b) a compound comprising a nucleophilic moiety; and (c) a compound comprising a moiety reactive to active hydrogen.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: November 18, 2014
    Assignee: POLYMERight, Inc.
    Inventors: Leonid Rappoport, Alexander Vainer, Aleksander Yam
  • Patent number: 8378060
    Abstract: A composition of the formulae MZAORSnR1F1mOAZ1M1, wherein O and S have their normal meaning of oxygen and sulfur, n is at least 2 and not more than 8, F1 is of the formula —OAORSnR1—, m is at least 1, Z and Z1 are the same or different and are oxy or amino, M and M1 are the same or different and are hydrogen or an organic substituent, R and R1 are the same or different and are organic divalent radicals, each having from 2 to 20 carbon atoms, and A is the residue of a dicarboxylic acid of from 2 to 40 carbon atoms.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: February 19, 2013
    Assignee: POLYMERight, Inc.
    Inventors: Leonid Rappoport, Aleksander Yam, Alexander Vainer
  • Publication number: 20120238718
    Abstract: A composition of the formulae MZAORSnR1F1mOAZ1M1, wherein O and S have their normal meaning of oxygen and sulfur, n is at least 2 and not more than 8, F1 is of the formula —OAORSnR1—, m is at least 1, Z and Z1 are the same or different and are oxy or amino, M and M1 are the same or different and are hydrogen or an organic substituent, R and R1 are the same or different and are organic divalent radicals, each having from 2 to 20 carbon atoms, and A is the residue of a dicarboxylic acid of from 2 to 40 carbon atoms.
    Type: Application
    Filed: March 22, 2012
    Publication date: September 20, 2012
    Applicant: POLYMERIGHT, INC.
    Inventors: Leonid RAPPOPORT, Aleksander YAM, Alex VAINER
  • Publication number: 20120130040
    Abstract: A composition comprising a reaction product of reactants comprising (a) a compound comprising (i) a polysulfide moiety and (ii) an oxygen atom in a ?-position to a sulfur link having the formula: where each R is independently selected from H or a C1 to C20 organyl group, R? is independently selected from a C1 to C20 organyl group, R?? is independently selected from H or a C1 to C20 organyl group, and x has an average of greater than 2, (b) a compound comprising a nucleophilic moiety; and (c) a compound comprising a moiety reactive to active hydrogen.
    Type: Application
    Filed: January 31, 2012
    Publication date: May 24, 2012
    Applicant: POLYMERIGHT, INC.
    Inventors: Leonid RAPPOPORT, Alexander VAINER, Aleksander YAM
  • Patent number: 8158726
    Abstract: The present invention provides poly(thioesters) and monomeric diesters, produced from di(hydroxyethyl)polysulfides and various mono- and di-basic carbonic acids or their anhydrides, and their derivatives. The new compounds combine properties of polyesters and polysulfides. The poly(thioesters) can be used as components in many compositions, including but not limited to adhesives, sealants, caulks, coatings, plastics, paints and elastomers. The monomeric diesters find use in compositions such as solvents and plasticizers.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: April 17, 2012
    Assignee: Polymeright, Inc.
    Inventors: Leonid Rappoport, Aleksander Yam, Alex Vainer
  • Patent number: 8138278
    Abstract: A composition comprising a reaction product of reactants comprising (a) a compound comprising (i) a polysulfide moiety and (ii) an oxygen atom in a ?-position to a sulfur link having the formula: where each R is independently selected from H or a C1 to C20 organyl group, R? is independently selected from a C1 to C20 organyl group, R?? is independently selected from H or a C1 to C20 organyl group, and x has an average of greater than 2, (b) a compound comprising a nucleophilic moiety; and (c) a compound comprising a moiety reactive to active hydrogen.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: March 20, 2012
    Assignee: POLYMERight, Inc.
    Inventors: Leonid Rappoport, Alexander Vainer, Aleksander Yam
  • Publication number: 20110152492
    Abstract: A composition comprising a reaction product of reactants comprising (a) a compound comprising (i) a polysulfide moiety and (ii) an oxygen atom in a ?-position to a sulfur link having the formula: where each R is independently selected from H or a C1 to C20 organyl group, R? is independently selected from a C1 to C20 organyl group, R?? is independently selected from H or a C1 to C20 organyl group, and x has an average of greater than 2, (b) a compound comprising a nucleophilic moiety; and (c) a compound comprising a moiety reactive to active hydrogen.
    Type: Application
    Filed: June 25, 2010
    Publication date: June 23, 2011
    Applicant: POLYMERIGHT, INC.
    Inventors: Leonid RAPPOPORT, Alexander VAINER, Aleksander YAM
  • Publication number: 20070015902
    Abstract: The present invention provides poly(thioesters) and monomeric diesters, produced from di(hydroxyethyl)polysulfides and various mono- and di-basic carbonic acids or their anhydrides, and their derivatives. The new compounds combine properties of polyesters and polysulfides. The poly(thioesters) can be used as components in many compositions, including but not limited to adhesives, sealants, caulks, coatings, plastics, paints and elastomers. The monomeric diesters find use in compositions such as solvents and plasticizers.
    Type: Application
    Filed: June 28, 2006
    Publication date: January 18, 2007
    Inventors: Leonid Rappoport, Aleksander Yam, Alex Valner
  • Patent number: 7087708
    Abstract: Compounds and polymers of such compounds are prepared based on the reaction product of a polysulfide containing diol and a dibasic acid, conveniently using an acid catalyst for the reaction. By appropriate choice of mole ratios, the resulting compound may have a hydroxyl and carboxyl, two hydroxyls or two carboxyls as terminal groups. The compounds can be modified by adding augmenting groups to change the terminal groups or properties of the monomer. The polymers find advantageous use as adhesives, sealants, coatings, paints, elastomers, plastic formulations, fibers, films and molded objects.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: August 8, 2006
    Assignee: Polymeright, Inc.
    Inventors: Leonid Rappoport, Aleksander Yam, Alex Vainer
  • Publication number: 20050143557
    Abstract: Compounds and polymers of such compounds are prepared based on the reaction product of a polysulfide containing diol and a dibasic acid, conveniently using an acid catalyst for the reaction. By appropriate choice of mole ratios, the resulting compound may have a hydroxyl and carboxyl, two hydroxyls or two carboxyls as terminal groups. The compounds can be modified by adding augmenting groups to change the terminal groups or properties of the monomer. The polymers find advantageous use as adhesives, sealants, coatings, paints, elastomers, plastic formulations, fibers, films and molded objects.
    Type: Application
    Filed: February 25, 2005
    Publication date: June 30, 2005
    Inventors: Leonid Rappoport, Aleksander Yam, Alex Vainer
  • Publication number: 20040230030
    Abstract: Compounds and polymers of such compounds are prepared based on the reaction product of a polysulfide containing diol and a dibasic acid, conveniently using an acid catalyst for the reaction. By appropriate choice of mole ratios, the resulting compound may have a hydroxyl and carboxyl, two hydroxyls or two carboxyls as terminal groups. The compounds can be modified by adding augmenting groups to change the terminal groups or properties of the monomer. The polymers find advantageous use as adhesives, sealants, coatings, paints, elastomers, plastic formulations, fibers, films and molded objects.
    Type: Application
    Filed: April 16, 2004
    Publication date: November 18, 2004
    Inventors: Leonid Rappoport, Aleksander Yam, Alex Vainer
  • Patent number: 6590011
    Abstract: An epoxy-amine composition includes an epoxy resin, an amine curative and a latent catalyst. The latent catalyst does not cause the instant acceleration of the reaction between epoxides and amines. In the presence of radiation, the latent catalyst generates an active catalyst that accelerates/initiates the cure process of the epoxy-amine composition.
    Type: Grant
    Filed: April 30, 2001
    Date of Patent: July 8, 2003
    Assignee: Polymeright, Inc.
    Inventors: Leonid Rappoport, Alex Vainer, Aleksander Yam
  • Patent number: 6495637
    Abstract: A formulation to produce urethane linkages reacts cyclocarbonate groups with diamines. Aliphatic polyhydroxyl precursor molecules are first epoxidized. The invention does not require complete epoxidation, as it makes use of the un-epoxidized hydroxyl groups of the precursor molecule. These hydroxyl groups are combined with isocyanate groups of prepolymer molecules to form urethane links. The use of prepolymers increases the networking, flexibility, and impact-resistance of the final product. The known formulations for amine hardeners also require complete carbonation of the epoxy groups to form reactive cyclocarbonate groups, which are reacted with diamines to form an amine hardener. In the proposed invention, both cyclocarbonate and epoxy groups are used to combine with the different diamine molecules by making use of the different reactivities of aliphatic, cycloaliphatic, and aromatic amine groups.
    Type: Grant
    Filed: February 22, 2001
    Date of Patent: December 17, 2002
    Assignee: 3L & T, Inc.
    Inventor: Leonid Rappoport
  • Publication number: 20020169272
    Abstract: Polyfunctional polymerizable urethane- or urea-containing oligomers allow the design, adjustment, and regulation of chemical and physical properties of the described oligomers. The invention discloses the formulas and compositions of these oligomers and methods of their synthesis. The described oligomers can be used for many purposes, both directly and in combination with other chemicals in multiple applications such as adhesives, sealants, coatings, composites, etc., as well as in castable and moldable materials.
    Type: Application
    Filed: March 19, 2002
    Publication date: November 14, 2002
    Inventors: Leonid Rappoport, Alex Vainer, Aleksander Yam
  • Patent number: 6465597
    Abstract: An epoxy-amine composition includes an epoxy resin, an amine curing agent and elemental sulfur as a cure accelerator. The degree of acceleration is highly regulated by the concentration of sulfur in the epoxy-amine composition and the time and conditions of the contact between sulfur and the amine curing agent of the epoxy-amine composition.
    Type: Grant
    Filed: July 18, 2001
    Date of Patent: October 15, 2002
    Assignee: Polymeright, Inc.
    Inventors: Leonid Rappoport, Alex Vainer, Aleksander Yam
  • Patent number: 6369188
    Abstract: Polyfunctional polymerizable urethane- or urea-containing oligomers allow the design, adjustment, and regulation of chemical and physical properties of the described oligomers. The invention discloses the formulas and compositions of these oligomers, methods of their synthesis, and methods of converting the described oligomers into useful polymeric products. The described oligomers can be used for many purposes, both directly and in combination with other chemicals in multiple applications such as adhesives, sealants, coatings, composites, etc., as well as in castable and moldable materials.
    Type: Grant
    Filed: March 27, 1999
    Date of Patent: April 9, 2002
    Assignee: Polymeright, Inc.
    Inventors: Leonid Rappoport, Alex Vainer, Aleksandr Yam
  • Publication number: 20010008924
    Abstract: A formulation to produce urethane linkages reacts cyclocarbonate groups with diamines. Aliphatic polyhydroxyl precursor molecules are first epoxidized. The invention does not require complete epoxidation, as it makes use of the unepoxidized hydroxyl groups of the precursor molecule. These hydroxyl groups are combined with isocyanate groups of prepolymer molecules to form urethane links. The use of prepolymers increases the networking, flexibility, and impact-resistance of the final product. The known formulations for amine hardeners also require complete carbonation of the epoxy groups to form reactive cyclocarbonate groups, which are reacted with diamines to form an amine hardener. In the proposed invention, both cyclocarbonate and epoxy groups are used to combine with the different diamine molecules by making use of the different reactivities of aliphatic, cycloaliphatic, and aromatic amine groups.
    Type: Application
    Filed: February 22, 2001
    Publication date: July 19, 2001
    Inventor: Leonid Rappoport
  • Patent number: 6218480
    Abstract: A formulation to produce urethane linkages reacts cyclocarbonate groups with diamines. Aliphatic polyhydroxyl precursor molecules are first epoxidized. The invention does not require complete epoxidation, as it makes use of the un-epoxidized hydroxyl groups of the precursor molecule. These hydroxyl groups are combined with isocyanate groups of prepolymer molecules to form urethane links. The use of prepolymers increases the networking, flexibility, and impact-resistance of the final product. The known formulations for amine hardeners also require complete carbonation of the epoxy groups to form reactive cyclocarbonate groups, which are reacted with diamines to form an amine hardener. In the proposed invention, both cyclocarbonate and epoxy groups are used to combine with the different diamine molecules by making use of the different reactivities of aliphatic, cycloaliphatic, and aromatic amine groups.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: April 17, 2001
    Assignee: MMR Technologies, Inc.
    Inventor: Leonid Rappoport