Patents by Inventor Yefim Blyakhman

Yefim Blyakhman 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).

  • Benzoxazine compounds derivated from phenolphthalein having flame-retardant properties and a process for their preparation
    Patent number: 9012543
    Abstract: The instant invention relates to 3,3?-bis(3,4-dihydro-3-phenyl-2H-1,3-benzoxazin-6-yl)-1(3H)-isobenzofuranone and analogues based on phenolphthalein, formaldehyde and a primary amine. Such compounds are, when cured to form polymeric networks, difficultly inflammable and resistant to high temperatures. Such compounds may especially be used in the production of printed wiring boards.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: April 21, 2015
    Assignee: Huntsman Advanced Materials Americas LLC
    Inventors: Roger Tietze, Dave Orser, Yefim Blyakhman, Mark Bryant, Bor-Sheng Lin
  • BOROXINE DERIVATIVES AS FLAME RETARDANT
    Publication number: 20100059174
    Abstract: The instant invention relates to boroxine derived compounds, for example tripropargylboroxine, the preparation of said compounds and the use as flame retardant in polymeric resins, in particular in thermosetting polymeric resins.
    Type: Application
    Filed: February 23, 2006
    Publication date: March 11, 2010
    Applicant: HUNTSMAN ADVANCED MATERIALS AMERICAS INC.
    Inventors: Roger Tietze, Dave Orser, Yefim Blyakhman, Mark Bryant, Bor-Sheng Lin, Ulrich Weidmann
  • Pyrrolidinone-containing compatibilizers
    Patent number: 6369163
    Abstract: There is described the use of monomeric and polymeric N-pyrrolidinone-containing compounds as compatibilizers for plastic compositions, a process for improving the compatibility of plastic compositions, the improved plastic compositions obtainable thereby as well as novel polymeric N-pyrrolidinone-containing compounds.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: April 9, 2002
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Rudolf Pfaendner, Yefim Blyakhman
  • 1-imidazolylmethyl-2-naphthols as catalysts for curing epoxy resins
    Patent number: 5591811
    Abstract: 1-Imidazolylmethyl-2-naphthols are effective catalysts and accelerators for curing epoxy resins, said naphthol compounds providing epoxy resin systems with prolonged room-temperature stability and fast curing at temperatures of 110.degree.-150.degree. C.
    Type: Grant
    Filed: September 12, 1995
    Date of Patent: January 7, 1997
    Assignee: Ciba-Geigy Corporation
    Inventor: Yefim Blyakhman
  • N-alkyl-N'-aryl-P-phenylenediamines as modifiers for epoxy resins
    Patent number: 5503936
    Abstract: N-Alkyl-N'-aryl-p-phenylenediamines, when added at 2.5 to 12.5% by weight, based on the total weight of the epoxy resin and hardener, cause the epoxy resin after curing to exhibit substantial increases in physical properties, such as strength, stiffness, toughness and hot/wet properties, compared to the properties of the cured, but unmodified epoxy resin.
    Type: Grant
    Filed: January 12, 1995
    Date of Patent: April 2, 1996
    Assignee: Ciba-Geigy Corporation
    Inventor: Yefim Blyakhman
  • High performance epoxy resin systems containing trimethylquinoline oligomers
    Patent number: 5464702
    Abstract: Oligomerized 1,2-dihydro-2,2,4-trimethylquinoline is an effective curing agent for epoxy resins to give products with high glass transition temperatures, low water absorption and excellent retention of hot/wet physical properties. These cured epoxy resins find use as matrix resins, in laminates, adhesives, coatings and in electrical applications.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: November 7, 1995
    Assignee: Ciba-Geigy Corporation
    Inventor: Yefim Blyakhman
  • Adducts of diaminodiphenyl sulfone compounds as hardeners for epoxy resins
    Patent number: 5331068
    Abstract: The present invention relates to a hardener for polyfunctional epoxy resins comprising the adduct obtained from the reaction of (1) a diaminodiphenyl sulfone of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently hydrogen, C.sub.1 -C.sub.4 alkyl or halogen and (2) a cycloaliphatic diepoxide at a ratio of aminohydrogen equivalent of said sulfone to said epoxy equivalent of said diepoxide from 2.5:1 to 75:1.
    Type: Grant
    Filed: August 19, 1993
    Date of Patent: July 19, 1994
    Assignee: Ciba-Geigy Corporation
    Inventor: Yefim Blyakhman
  • Aromatic trisanhydrides
    Patent number: 5310943
    Abstract: Aromatic trisanhydrides of the formula (I) ##STR1## wherein R is hydrogen, C.sub.1 -C.sub.4 alkyl or aryl are useful for the synthesis of star-branched and star-burst polyester-imides and polyesterimide-amides and as curing agents for epoxy resins, phenolics and polyesters.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: May 10, 1994
    Assignee: Ciba-Geigy Corporation
    Inventor: Yefim Blyakhman
  • Aromatic trisanhydrides
    Patent number: 5241082
    Abstract: Aromatic trisanhydrides of the formula (I) ##STR1## wherein R is hydrogen, C.sub.1 -C.sub.4 alkyl or aryl are useful for the synthesis of star-branched and star-burst polyester-imides and polyesterimide-amides and as curing agents for epoxy resins, phenolics and polyesters.
    Type: Grant
    Filed: March 11, 1991
    Date of Patent: August 31, 1993
    Assignee: Ciba-Geigy Corporation
    Inventor: Yefim Blyakhman
  • Aromatic monoanhydride-esters
    Patent number: 5191088
    Abstract: Aromatic monoanhydride-esters of the formula (I) ##STR1## wherein R.sup.1 is ##STR2## and R.sup.2 is hydrogen, C.sub.1 -C.sub.4 alkyl or --OCH.sub.3 are useful as endcapping agents for the synthesis of multifunctional high temperature resins such as polyimides, polyimide-esters, polyimide-ethers and polyimide-amides.
    Type: Grant
    Filed: November 13, 1991
    Date of Patent: March 2, 1993
    Assignee: Ciba-Geigy Corporation
    Inventor: Yefim Blyakhman
  • Substituted diallylphenol derivatives as reactive diluents for bismaleimides
    Patent number: 5025095
    Abstract: Substituted diallylphenol derivatives are useful as reactive diluents for bismaleimides. Formulations comprising bismaleimides and substituted diallylphenol derivatives are particularly useful in resin transfer molding and filament winding techniques.
    Type: Grant
    Filed: October 12, 1990
    Date of Patent: June 18, 1991
    Assignee: Ciba-Geigy Corporation
    Inventors: Yefim Blyakhman, Byung H. Lee