Patents Assigned to CONNORA TECHNOLOGIES, INC.
  • Synthesis of and compositions containing diaminoacetals and diaminoketals
    Patent number: 10214479
    Abstract: The present invention relates to the reduction of polycyano compounds to produce polyamines, in particular diaminoacetal and diaminoketal compounds, and their use as curing agents in epoxy resin compositions. The reduction with molecular hydrogen can be carried out using a metal catalyst selected from GROUP VIII and a catalytic promoter. The reduction can include anhydrous or aqueous ammonia. The reaction can be carried out in continuous and batch modes with catalyst and solvent recycling. The epoxy resin composition consisting of an epoxy resin and a polyamine curing agent that can be used in fiber-reinforced composite materials, coating materials, and the like.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: February 26, 2019
    Assignee: Connora Technologies, Inc.
    Inventors: Szymon Kosinski, Stefan J. Pastine
  • Sterically hindered aliphatic polyamine cross-linking agents, compositions containing them and uses thereof
    Patent number: 9862797
    Abstract: The present disclosure relates, in part, to an epoxy resin composition comprising: an epoxy resin; and an aliphatic polyamine (e.g., as a cross-linking agent), wherein the aliphatic polyamine comprises a compound having the structure of Formula (1): wherein each of R1 and R2 is independently selected from the group consisting of hydrogen, alkyl group, cycloalkyl group and aromatic group; or R1 and R2 together with the carbon atom to which they are attached form a cyclic ring; each of R3 and R4 is independently selected from the group consisting of hydrogen, alkyl group, cycloalkyl group and aromatic group.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: January 9, 2018
    Assignee: Connora Technologies, Inc.
    Inventor: Stefan J. Pastine
  • SYNTHESIS OF AND COMPOSITIONS CONTAINING DIAMINOACETALS AND DIAMINOKETALS
    Publication number: 20170114002
    Abstract: The present invention relates to the reduction of polycyano compounds to produce polyamines, in particular diaminoacetal and diaminoketal compounds, and their use as curing agents in epoxy resin compositions. The reduction with molecular hydrogen can be carried out using a metal catalyst selected from GROUP VIII and a catalytic promoter. The reduction can include anhydrous or aqueous ammonia. The reaction can be carried out in continuous and batch modes with catalyst and solvent recycling. The epoxy resin composition consisting of an epoxy resin and a polyamine curing agent that can be used in fiber-reinforced composite materials, coating materials, and the like.
    Type: Application
    Filed: January 3, 2017
    Publication date: April 27, 2017
    Applicant: CONNORA TECHNOLOGIES, INC.
    Inventor: Stefan J. Pastine
  • Agents for reworkable epoxy resins
    Patent number: 9631049
    Abstract: Compounds of formula I, uses as crosslinking agents or curing agents thereof, and resins obtained by using the compounds as crosslinking agents.
    Type: Grant
    Filed: July 8, 2011
    Date of Patent: April 25, 2017
    Assignee: CONNORA TECHNOLOGIES, INC.
    Inventors: Stefan J. Pastine, Bo Liang, Bing Qin
  • Processes for the preparation of di-(2-aminoethyl) formal, di-(3-aminopropyl) formal, and related molecules
    Patent number: 8785694
    Abstract: Disclosed herein are hardeners for use in making cleavable epoxy compositions, including compositions wherein components in contact with epoxy composition can be recovered, as well as methods of making such hardeners.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: July 22, 2014
    Assignee: Connora Technologies, Inc
    Inventor: Stefan J. Pastine
  • NOVEL AGENTS FOR REWORKABLE EPOXY RESINS
    Publication number: 20130245204
    Abstract: Compounds of formula I, uses as crosslinking agents or curing agents thereof, and resins obtained by using the compounds as crosslinking agents.
    Type: Application
    Filed: July 8, 2011
    Publication date: September 19, 2013
    Applicant: CONNORA TECHNOLOGIES, INC.
    Inventors: Stefan J. Pastine, Bo Liang, Bing Qin