Patents by Inventor David A. Shimp

David A. Shimp 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).

  • Low temperature curable dicyanate esters of dihydric phenols
    Patent number: 5149863
    Abstract: Cyanate esters of 4,4'-[1,3-phenylenebis(1-methylethylidene)] 2,2',6,6'-R-bisphenol when properly catalyzed, can be cured at temperatures in the range of about 250.degree. to about 300.degree. F. to obtain percent cyclotrimerization of the cyanate ester groups of at least 80 percent.
    Type: Grant
    Filed: August 12, 1991
    Date of Patent: September 22, 1992
    Assignee: Hi-Tek Polymers, Inc.
    Inventors: David A. Shimp, Jeffrey T. Vanderlip
  • Low temperature curable dicyanate ester of dihydric phenol composition
    Patent number: 5068309
    Abstract: Cyanate esters of 4,4'-[1,3-phenylenebis (1-methylethylidene)] 2,2',6,6'-R-bisphenol when properly catalyzed, can be cured at temperatures in the range of about 250.degree. to about 300.degree. F. to obtain percent cyclotrimerization of the cyanate ester groups of at least 80 percent.
    Type: Grant
    Filed: March 29, 1990
    Date of Patent: November 26, 1991
    Assignee: Hi-Tek Polymers, Inc.
    Inventors: David A. Shimp, Jeffrey T. Vanderlip
  • Polycyanate esters of polyhydric phenols blended with thermoplastic polymers
    Patent number: 4983683
    Abstract: Curable compositions are made from blends of polycyanate ester of polyhydric phenols and amorphous, aromatic thermoplastic resins which are initially soluble in the polycyanate ester but which phase separate during curing of the polycyanate ester.
    Type: Grant
    Filed: November 6, 1989
    Date of Patent: January 8, 1991
    Assignee: Hi-Tek Polymers, Inc.
    Inventor: David A. Shimp
  • Stable solutions of prepolymers of thiodi(phenylcyanate) and laminating method employing same
    Patent number: 4940848
    Abstract: Stable prepolymer solutions are made from partially cyclotrimerized 4,4'-thiodi(phenylcyanate) dissolved in cyclopentanone. The prepolymer solutions are used to make flame retardant and thermally stable laminates.
    Type: Grant
    Filed: November 10, 1988
    Date of Patent: July 10, 1990
    Assignee: Hi-Tek Polymers, Inc.
    Inventor: David A. Shimp
  • Flame retardant polycyanate ester blend
    Patent number: 4931545
    Abstract: Flame retardant thermoset compositions having excellent water absorption resistance, caustic resistance, and low dielectric constants are made from blends of the dicyanate ester of 4,4'-(hexafluoroisopropylidene) bisphenol and a different polycyanate ester of a polyhydric phenol.
    Type: Grant
    Filed: May 3, 1989
    Date of Patent: June 5, 1990
    Assignee: Hi-Tek Polymers, Inc.
    Inventors: David A. Shimp, Steven J. Ising
  • Polycyanate esters of polyhydric phenols blended with thermoplastic polymers
    Patent number: 4902752
    Abstract: Curable compositions are made from blends of polycyanate esters of polyhydric phenols and amorphous, aromatic thermoplastic resins which are initially soluble in the polycyanate ester but which phase separate during curing of the polycyanate ester.
    Type: Grant
    Filed: October 5, 1987
    Date of Patent: February 20, 1990
    Assignee: Hi-Tek Polymers, Inc.
    Inventor: David A. Shimp
  • Metal acetylacetonate/alkylphenol curing catalyst for polycyanate esters of polyhydric phenols
    Patent number: 4847233
    Abstract: Polycyanate esters of polyhydric phenols are cured with a liquid solution of a metal acetylacetonate in an alkylphenol. Such cured compositions are useful in structural composites, transfer molded-encapsulants, filmed structural adhesives and printed wiring boards.
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: July 11, 1989
    Assignee: Hi-Tek Polymers, Inc.
    Inventor: David A. Shimp
  • Metal acetylacetonate/alkylphenol curing catalyst for polycyanate esters of polyhydric phenols
    Patent number: 4785075
    Abstract: Polycyanate esters of polyhydric phenols are cured with a liquid solution of a metal acetylacetonate in an alkylphenol. Such cured compositions are useful in structural composites, transfer molded-encapsulants, filmed structural adhesives and printed wiring boards.
    Type: Grant
    Filed: July 27, 1987
    Date of Patent: November 15, 1988
    Assignee: Interez, Inc.
    Inventor: David A. Shimp
  • Blend of dicyanate esters of dihydric phenols
    Patent number: 4740584
    Abstract: Blends of ortho substituted dicyanate esters and unsubstituted dicyanate esters when partially reacted to form co-prepolymers are appreciably lower in viscosity at process temperatures than the homo-prepolymers of a particular dicyante. When cured, the blends exhibit excellent heat and moisture resistance properties. The cured compositions are useful in structural composites, filmed structural adhesives and printed wiring boards.
    Type: Grant
    Filed: September 8, 1986
    Date of Patent: April 26, 1988
    Assignee: Interez, Inc.
    Inventor: David Shimp
  • Bis-maleimide resin systems and structural composites prepared therefrom
    Patent number: 4721639
    Abstract: The use of organophosphines, organophosphonium salts or organophosphine complexes as cure catalysts in the cure of maleimide resin systems produces products having excellent physical properties and improved gel times. These systems are especially useful in the production of advanced structural composites.
    Type: Grant
    Filed: November 24, 1986
    Date of Patent: January 26, 1988
    Assignee: BASF Corporation
    Inventors: David A. Shimp, Jack D. Boyd
  • Blend of tris (cyanatophenyl) alkane and bis(cyanatophenyl) alkane
    Patent number: 4709008
    Abstract: Blends of tricyanate esters and dicyanate esters when cured exhibit excellent heat and moisture resistant properties. The cured compositions are useful in structural composites, filmed structural adhesive and printed wiring boards.
    Type: Grant
    Filed: June 30, 1986
    Date of Patent: November 24, 1987
    Assignee: Interez, Inc.
    Inventor: David A. Shimp
  • Bis-maleimide resin systems and structural composites prepared therefrom
    Patent number: 4644039
    Abstract: The use of organophosphines, organophosphonium salts or organophosphine complexes as cure catalysts in the cure of maleimide resin systems produces products having excellent physical properties and improved gel times. These systems are especially useful in the production of advanced structural composites.
    Type: Grant
    Filed: March 14, 1986
    Date of Patent: February 17, 1987
    Assignee: BASF Corporation
    Inventors: Jack D. Boyd, David A. Shimp
  • Metal carboxylate/alcohol curing catalyst for polycyanate ester of polyhydric phenol
    Patent number: 4608434
    Abstract: Polycyanate esters of polyhydric phenols are cured with a liquid solution of a coordinating transition metal carboxylate in a monohydric alcohol. Such cured compositions are useful in structural composites, transfer molded encapsulants, filmed structural adhesives and printed wiring boards.
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: August 26, 1986
    Assignee: Celanese Corporation
    Inventor: David A. Shimp
  • Metal carboxylate/alkylphenol curing catalyst for polycyanate esters of polyhydric phenols
    Patent number: 4604452
    Abstract: Polycyanate esters of polyhydric phenols are cured with a liquid solution of a coordinating transition metal carboxylate in an alkylphenol. Such cured compositions are useful in structural composites, transfer molded encapsulants, filmed structural adhesives and printed wiring boards.
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: August 5, 1986
    Assignee: Celanese Corporation
    Inventor: David A. Shimp
  • Stable blends of N,N-diglycidyl amines and polyglycidyl ethers of polyhydric phenols
    Patent number: 4490273
    Abstract: Stable polyepoxide blends are made from N,N-diglycidyl aromatic amines having alkyl substituents on one or both aromatic nucleus positions ortho to the amine group and polyglycidyl ethers of polyhydric phenols. Such blends are useful in various plastics applications when cured.
    Type: Grant
    Filed: November 16, 1983
    Date of Patent: December 25, 1984
    Assignee: Celanese Corporation
    Inventor: David A. Shimp
  • Polyglycidyl hindered aromatic amines
    Patent number: 4487948
    Abstract: Polyglycidyl amines having room temperature latency when blended with curing agents and high heat distortion temperatures when cured are derived from hindered aromatic diamines and epihalohydrins. Cured products obtained from these polyglycidyl amines and curing agents are useful in structural composites, film adhesives, molding compounds and the like.
    Type: Grant
    Filed: March 23, 1983
    Date of Patent: December 11, 1984
    Assignee: Celanese Corporation
    Inventors: David A. Shimp, Richard B. Graver
  • Metal fluoborate catalyzed hindered aromatic amine curing agents for polyepoxide resins
    Patent number: 4447586
    Abstract: Curable compositions are made from polyepoxide resins and hindered aromatic diamines accelerated with copper fluoborate. Cured products obtained from these compositions are useful in oil well casings, geothermal piping, chemical piping and tankage, filament wound large composites and the like.
    Type: Grant
    Filed: April 11, 1983
    Date of Patent: May 8, 1984
    Assignee: Celanese Corporation
    Inventor: David A. Shimp
  • Polyol/imidazole curing agents for epoxy resins
    Patent number: 4417010
    Abstract: A liquid curing agent for polyepoxides having terminal epoxide groups is made from a blend of a normally solid aliphatic polyol and a monoimidazole. Cured compositions made from the curing agent and the polyepoxide are useful in various types of plastics applications.
    Type: Grant
    Filed: February 2, 1983
    Date of Patent: November 22, 1983
    Assignee: Celanese Corporation
    Inventor: David A. Shimp
  • Water reducible coating composiions
    Patent number: 4388374
    Abstract: Water reducible compositions useful as coating compositions for flexible substrates are prepard by reacting a glycidyl polyether of a dihydric phenol with a polyethylene glycol and ortho phosphoric acid.
    Type: Grant
    Filed: August 30, 1982
    Date of Patent: June 14, 1983
    Assignee: Celanese Corporation
    Inventor: David A. Shimp
  • Ether-ester water reducible coating compositions
    Patent number: 4360613
    Abstract: Water reducible compositions useful as coating compositions for flexible substrates are prepared by reacting a glycidyl polyether of a dihydric phenol with a polyethylene glycol and ortho phosphoric acid.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: November 23, 1982
    Assignee: Celanese Corporation
    Inventor: David A. Shimp