Patents Assigned to Hercules
  • Patent number: 5066433
    Abstract: Process of carbon fiber manufacture wherein the polyacrylonitrile precursor is stretched prior to oxidation step of the carbonization operation but after the stretching step of the spinning operation in limited temperature range. Process permits greater throughput in precursor manufacture and reduces flaws in the precursor because significant stretching is at lower line speeds typically used for oxidation and carbonization in making carbon fiber.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: November 19, 1991
    Assignee: Hercules Incorporated
    Inventor: James T. Paul, Jr.
  • Patent number: 5064919
    Abstract: A process for producing a molded article by introducing a reactive liquid mixture which comprises a cycloalkene containing dicyclopentadiene, a norbornene-type monomer containing at least one N-substituted 5-membered cyclic imide group and a metathesis polymerization catalyst system and which has moderated metathesis polymerizability into a mold in which the liquid mixture is metathesis polymerized, and a multi-part polymerizable composition for producing the molded article.
    Type: Grant
    Filed: November 24, 1989
    Date of Patent: November 12, 1991
    Assignee: Hercules Incorporated
    Inventors: Shigeyoshi Hara, Zen-ichiro Endo, Hiroshi Mera
  • Patent number: 5061521
    Abstract: A method for improving the properties of a metathesis polymerized cycloolefin article by treating with molecular halogen in an organic solvent. Degree of treatment can be regulated according to the swelling power of the solvent for the polymer. Improved properties include improved flame retardance, oxidation resistance and surface properties.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: October 29, 1991
    Assignee: Hercules Incorporated
    Inventors: Zen-ichiro Endo, Shigeyoshi Hara, Umewaka Nakatani
  • Patent number: 5055499
    Abstract: A method is disclosed for preparing filled shaped articles of metathesis polymerized poly(cycloolefins) wherein an inorganic filler material is treated with a norbornene-substituted silane coupling agent. The norbornene moiety copolymerizes with the metathesis polymerizable monomer and the silane moiety creates a bond with the filler. Products are characterized by improved physical properties.
    Type: Grant
    Filed: January 5, 1990
    Date of Patent: October 8, 1991
    Assignee: Hercules Incorporated
    Inventors: Zenichiro Endo, Shigeyoshi Hara, Paul A. Silver, Hikoichiro Yamada
  • Patent number: 5053256
    Abstract: A method of improving the paint adhesion properties of a cycloolefin polymer article comprising exposing the surface of said article to a solution of sodium hypochlorite or a solution of potassium permanganate. Preferably the solution is of sodium hypochlorite and it further contains a detergent solution.
    Type: Grant
    Filed: November 3, 1988
    Date of Patent: October 1, 1991
    Assignee: Hercules Incorporated
    Inventor: Harold F. Haag
  • Patent number: 5051150
    Abstract: A stabilized synthetic polyolefin pulp-cellulose blend is prepared by adding 0.1-1.0% by weight of an antioxidant (a hindered phenolic and/or phosphite antioxidant) to a solution of a polyolefin and solvent wherein the antioxidant is homogenously dispersed therein, forming the polyolefin into a polyolefin pulp, and then mixing the polyolefin pulp with from about 55 to about 90% by weight of a wood pulp to produce the blend. This blend with improved higher ignition temperature is used in the absorbent products industry as an absorbent core, when the blend is heated sufficiently to melt the polyolefin.
    Type: Grant
    Filed: March 20, 1989
    Date of Patent: September 24, 1991
    Assignee: Hercules Incorporated
    Inventors: Elliott Echt, Edward J. Engle, III
  • Patent number: 5049652
    Abstract: Rosin esters having improved viscosity stability are prepared by heating a mixture of rosin and a polyol in the presence of a catalyst mixture of 0.1% to 0.6% by weight calcium bis(ethyl 3,5-di-t-butyl-4-hydroxybenzyl phosphonate) and 0.02 to 1.0% by weight of a second calcium compound selected from calcium carbonate, calcium oxide and a calcium salt of an aliphatic carboxylic acid, all percentages being based on the weight of rosin.
    Type: Grant
    Filed: November 30, 1990
    Date of Patent: September 17, 1991
    Assignee: Hercules Incorporated
    Inventor: James Minn
  • Patent number: 5049615
    Abstract: Novel thermoplastic compositions are provided comprising a blend of a polyindane resin and an engineering thermoplastic such as polyphenylene ethers, polysulfones, polycarbonates, polyether ether ketones, polyarylates, polyamides, polyimides and polyphenylene sulfides. Blends of thermoplastic block copolymers with polyindane resins are also provided. These blends provide improved processability with good physical properties including high impact strength and high heat distortion temperature.
    Type: Grant
    Filed: December 11, 1989
    Date of Patent: September 17, 1991
    Assignee: Hercules Incorporated
    Inventors: Sung G. Chu, Birendra K. Patnaik, Keith S. Shih
  • Patent number: 5045331
    Abstract: A container for storage of fruits or vegetables wherein the optimum environment, i.e., the optimum carbon dioxide to oxygen ratio, for the storage of said fruits or vegetable can be attained and maintained, thereby retarding maturation and spoilage thereof. The environment is controlled by providing a resin-coated nonwoven panel of limited carbon dioxide and oxygen permeability on an otherwise substantially impermeable container. The size of this panel is a function of its permeability, the amount and respiration rate of the contents, and the ratio of carbon dioxide of oxygen desired.
    Type: Grant
    Filed: March 30, 1988
    Date of Patent: September 3, 1991
    Assignee: Hercules Incorporated
    Inventor: Mitchell K. Antoon, Jr.
  • Patent number: 5045387
    Abstract: A method for imparting and retaining hydrophilicity and liquid strike-through properties within an essentially hydrophobic polyolefin-containing nonwoven material and the corresponding fiber, fibrillated film, and nonwoven product thereof, whereby essentially hydrophobic polyolefin-containing fiber or film is topically treated with an effective amount of one or more of a water soluble polyalkoxylated polydimethylsiloxane, an alkoxylated ricinolein with certain fatty acids, or corresponding hydrogenated derivatives thereof.
    Type: Grant
    Filed: July 28, 1989
    Date of Patent: September 3, 1991
    Assignee: Hercules Incorporated
    Inventor: A. Chandler Schmalz
  • Patent number: 5045362
    Abstract: A metathesis polymerized cycloolefin article may be improved by treating with halogen halide in an organic solvent. Degree of treatment can be regulated according to the swelling power of the solvent for the polymer. Improved properties include improved flame retardance, oxidation resistance and surface properties.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: September 3, 1991
    Assignee: Hercules Incorporated
    Inventors: Shigeyoshi Hara, Umewaka Nakatani
  • Patent number: 5045147
    Abstract: A filament winding system includes a head that selects the number of tows to be within a winding band while winding and positioning the winding band directly on the mandrel according to contours of the mandrel. Half of the tows are conveyed in an upper portion of the head and the remaining half are conveyed in a lower portion of the head with both halves meeting at an applicating roller at the discharge end of the tows. The head includes cut and add assemblies wherein the individual tows are selectively cut and later can be added to the band.
    Type: Grant
    Filed: November 23, 1988
    Date of Patent: September 3, 1991
    Assignee: Hercules Incorporated
    Inventors: Vernon M. Benson, Dee R. Gill, Boyd L. Hatch, John A. Johnson, Brian Moloney, Noel I. Shepherd, Keith G. Shupe, William J. Weis
  • Patent number: 5040583
    Abstract: An innerliner for tubeless tires is comprised of at least one non-elastomeric barrier layer such as poly(vinylidene chloride) or ethylene--vinyl alcohol copolymer film with each barrier layer sandwiched between two layers of an elastomeric material adhering to the rubber stock employed in the carcass of the tire. The innerliner has the advantage of imparting equal or better air retention properties to the tire with a substantial reduction in the thickness and weight relative to conventional halobutyl rubber innerliners.
    Type: Grant
    Filed: March 13, 1990
    Date of Patent: August 20, 1991
    Assignee: Hercules Incorporated
    Inventors: Kuang F. Lin, Daniel W. Klosiewicz
  • Patent number: 5041483
    Abstract: Rosin esters are used to reduce the tendency of shaped articles made from polypropylene, especially fibers, to form malodorous decomposition products upon sterilization by gamma-irradiation. Other stabilizers normally used to prevent discoloration and degradation of polyolefins may also be present. Stabilized fibers are used for the manufacture of disposable medical products.
    Type: Grant
    Filed: April 4, 1988
    Date of Patent: August 20, 1991
    Assignee: Hercules Incorporated
    Inventor: George N. B. Burch
  • Patent number: 5039636
    Abstract: An aluminum- and titanium-containing oligomer is prepared by a controlled hydrolysis reaction between a chelated aluminum compound and an organotitanium compound. The oligomer is heated to 800.degree. C. in an oxygen-containing atmosphere to produce .beta.-aluminum titanate.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: August 13, 1991
    Assignee: Hercules Incorporated
    Inventor: Alexander Lukacs, III
  • Patent number: 5038803
    Abstract: Method for controlling delivery of by-products found in cigarette smoke by utilizing a cigarette filter element comprising one or more substrates treated with an effective amount of at least one of (A) zinc chloride, ferrous bromide, calcium bromide, lithium bromide, zinc thiocyanate, sarcosine hydrochloride, manganese sulfate, manganese acetate, magnesium chloride and magnesium acetate; alone or combined with (B) glyceryl triacetate; plus corresponding treated filter element(s) and cigarette(s) utilizing such filter elements(s).
    Type: Grant
    Filed: July 1, 1988
    Date of Patent: August 13, 1991
    Assignee: Hercules Incorporated
    Inventors: Richmond R. Cohen, David J. Gibboni
  • Patent number: 5033172
    Abstract: A method and corresponding product whereby hydrophobic polyolefin-containing nonwoven materials are provided with sustainable hydrophilic properties for rewet purposes by incorporation into the appropriate spin melt composition an effective amount of an alkoxylated fatty amine in optional combination with up to 60% by weight of primary fatty acid amide.
    Type: Grant
    Filed: June 1, 1989
    Date of Patent: July 23, 1991
    Assignee: Hercules Incorporated
    Inventor: James H. Harrington
  • Patent number: 5033385
    Abstract: Method for air dispersion of filamentary type organic material from an initial compressed form comprising a component of a propellant and/or air-activated shell-like structure.An invention comprised of a plurality of compressed filamentary organic materials, a vehicle for storing and dispersing said materials and a method for effecting air dispersion of such materials.
    Type: Grant
    Filed: November 20, 1989
    Date of Patent: July 23, 1991
    Assignee: Hercules Incorporated
    Inventor: Fevzil Zeren
  • Patent number: 5032009
    Abstract: A process of aligning or realigning a liquid crystal medium adjacent to a substrate which process comprises (1) exposing anisotropically absorbing molecules disposed on the substrate, disposed in the liquid crystal medium or which themselves are the liquid crystal medium to linearly polarized light of a wavelength or wavelengths within the absorption band of the anisotropically absorbing molecules, wherein (a) the exposed anisotropically absorbing molecules induce alignment of the liquid crystal medium at an angle + and - .theta.
    Type: Grant
    Filed: August 13, 1990
    Date of Patent: July 16, 1991
    Assignee: Hercules Incorporated
    Inventors: Wayne M. Gibbons, Shao-Tang Sun, Brian J. Swetlin
  • Patent number: 5032649
    Abstract: Silazane polymers are prepared by (1) reacting ammonia with one or more halogenated organic silicon compounds containing an Si-H bond to produce a silazane ammonolysis product, (2) mixing the ammonolysis product with 0.1% to 30% by weight of an organic amide or thioamide, and (3) heating to a temperature of 30.degree. to 300.degree. C. Silazane polymers containing alkenyl or alkynyl groups can be cured by supplying energy to generate free radicals. The cured or uncured polymers can be pyrolyzed to produce silicon nitride-containing ceramic materials.
    Type: Grant
    Filed: November 27, 1989
    Date of Patent: July 16, 1991
    Assignee: Hercules Incorporated
    Inventor: Joanne M. Schwark