Patents by Inventor Rene Dien

Rene Dien 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).

  • Impregnating solutions based on at least one reactive thermoplastic poly (imide-amide) oligomer and a coreactant, which can be used especially for the production of preimpregnated intermediate articles
    Patent number: 5470920
    Abstract: The present invention relates to impregnating solutions consisting:of an active principle A+B in which: A denotes at least one thermoplastic poly(imide-amide) oligomer functionalized at the chain ends with an alkenyloxy, maleimido or nadimido group, B denotes a coreactant chosen from: B1=an imide ingredient, B2=an acrylate ingredient, B3=an alkenylphenol ingredient, B4=a novolac resin, B5=a vinyl ingredient, B6=an epoxy resin, B7=an amino ingredient and B8=a mixture of a number of ingredients B1 to B7;and of one or a number of aprotic polar solvent(s), the concentration of the active principle in the solution being between 2 and 80% by weight.These solutions are employed especially for the production of preimpregnated intermediate articles.
    Type: Grant
    Filed: October 1, 1993
    Date of Patent: November 28, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Yves Camberlin, Rene Dien, Philippe Michaud
  • Thermally stable bisimido/p-allylaniline copolymers
    Patent number: 5198516
    Abstract: Novel thermally stable bisimido/allylaniline polymers and prepolymers, well adopted for the production of prepregs and reinforced and impregnated composite shaped articles, comprise the copolymerizates of (a) at least one N,N'-bisimide, with (b) at least one hindered p-allylaniline, optionally in the presence of (c) an organic peroxide, azobisisobutyronitrile or an imidazole, (d) a vinylpyridine, N-vinylpyrrolidone, allyl isocyanurate, vinyltetrahydrofuran, or mixture thereof, (e) at least one diprimary diamine, and/or (f) an unhalogenated or chlorinated/brominated epoxy resin or N,N'-alkylenebistetrahalophthalimide, or particular (meth)acrylate or alkenylphenol.
    Type: Grant
    Filed: July 16, 1991
    Date of Patent: March 30, 1993
    Assignee: Ciba-Geigy Corporation
    Inventors: Yves Camberlin, Rene Dien, Philippe Michaud
  • Polymer from (1) bis-imide, (2) allyloxy-phenyl maleimide and (3) diamine
    Patent number: 4777237
    Abstract: Novel, heat-stable imido polymers, well adopted, e.g., as coating or molding resins, comprise the polymerizates of (a) at least one N,N'-bismaleimide, (b) at least one diprimary diamine, and (c) at least one N-(meth)-allyloxyphenylmaleimide.
    Type: Grant
    Filed: November 13, 1986
    Date of Patent: October 11, 1988
    Assignee: Rhone-Poulenc Specialities Chimiques
    Inventors: Rene Dien, Michel Rakoutz
  • Imido polymer from bis imide and alkenyloxyaniline
    Patent number: 4742141
    Abstract: Novel, heat-stable imido polymers, well adopted, e.g., as impregnants, or coating or molding resins, comprise the polymerizates of (a) at least one N,N'-bismaleimide, (b) at least one alkenyloxyaniline, and, optionally, (c) at least one N-(meth)allyloxyphenylmaleimide.
    Type: Grant
    Filed: November 13, 1986
    Date of Patent: May 3, 1988
    Assignee: Rhone-Poulenc Specialites Chimiques
    Inventors: Rene Dien, Michel Rakoutz
  • Storage-stable thermosetting compositions comprising an imido/organosilicon prepolymer
    Patent number: 4650719
    Abstract: Storage-stable, adhesive, flexible and mechanically improved thermosetting film-forming compositions are comprised of (A) an imido-hydroxylated organosilicon prepolymer, (B) triallyl isocyanurate or an acrylic ester of a diphenylated siloxane, (C) an imidazole, and (D) an N,N',N"-tris(hydroxyalkyl)hexahydrotriazine.
    Type: Grant
    Filed: October 25, 1985
    Date of Patent: March 17, 1987
    Assignee: Rhone-Poulenc Specialites Chimiques
    Inventors: Rene Dien, Guy Poulain
  • Storage-stable thermosetting compositions comprising imido prepolymers
    Patent number: 4544728
    Abstract: Storage-stable thermosetting compositions, well adopted for molding or the production of prepregs, and characterized by the absense of gas release upon crosslinking, are comprised of (A) an imido/hydroxylated organosilicon compound prepolymer, (B) triallyl isocyanurate or an acrylic ester of an ethoxyphenylated siloxane, and (C) an imidazole compound.
    Type: Grant
    Filed: October 25, 1984
    Date of Patent: October 1, 1985
    Assignee: Rhone-Poulenc Specialites Chimiques
    Inventors: Rene Dien, Guy Poulain