Patents Assigned to Hercules
  • Precoat resin dispersion for tufted carpets
    Patent number: 4604311
    Abstract: Disclosed is a precoat resin dispersion having a solids content from about 63% to about 69% comprising (1) at least one resin having a Ring and Ball softening point from about 60.degree. C. to about 100.degree. C. in an aqueous dispersion having a solids content from about 53% to about 58%; (2) at least one water-soluble polymer; (3) at least one cationic resin; and (4) water. The precoat resin dispersion is useful in the manufacture of tufted carpets, especially carpets manufactured with carboxylated latices as a backcoat.
    Type: Grant
    Filed: June 27, 1985
    Date of Patent: August 5, 1986
    Assignee: Hercules Incorporated
    Inventor: Raymond W. Goss
  • Halogen-free, high flash point reactant solution
    Patent number: 4604447
    Abstract: Disclosed is a reactant solution comprised of dicyclopentadiene; trialkyl aluminum, where each alkyl contains from 5 to 10 carbon atoms and where the trialkyl aluminum is present in a dicyclopentadiene to trialkyl aluminum molar ratio of about 80:1 to about 1300:1; and bis(2-methoxyethyl)ether, where the bis(2-methoxyethyl)ether is present in a trialkyl aluminum to bis(2-methoxyethyl)ether ratio of at least 1:0.5. Such a solution, which is both halogen-free and has a flash point greater than 100.degree. F., is useful as a reactant solution in the metathetical-polymerization of the dicyclopentadiene.
    Type: Grant
    Filed: November 22, 1983
    Date of Patent: August 5, 1986
    Assignee: Hercules Incorporated
    Inventor: Gerald D. Malpass, Jr.
  • Scavengers for the removal of impurities from inert fluids
    Patent number: 4604270
    Abstract: Lewis acid and oxidant impurities are removed from inert fluids by contacting with a high capacity macroreticulate polymer comprising a macroreticulate polymer backbone having a plurality of pendant functional groups or mixtures of functional groups having the general formula: ##STR1## where Ar is an aromatic hydrocarbon radical containing from one to three rings; R.sub.1 and R.sub.2 are the same or different and are selected from the group consisting of hydrogen, alkyl hydrocarbon radicals, methylene-bridged benzophenone radicals, salts of methylene-bridged benzophenone, methylene-bridged fluorenone radicals and salts of methylene-bridged fluorenone; and M is selected from the group consisting of lithium, potassium, sodium, alkyl magnesium, and alkyl zinc.
    Type: Grant
    Filed: July 31, 1985
    Date of Patent: August 5, 1986
    Assignee: Hercules Incorporated
    Inventor: Glenn M. Tom
  • Macroreticulate polymer scavengers for the removal of impurities from inert fluids
    Patent number: 4603148
    Abstract: Lewis acid and oxidant impurities are removed from inert fluids by contacting with a high capacity macroreticulate polymer comprising a macroreticulate polymer backbone having a plurality of pendant functional groups or mixtures of functional groups having the general formula: ##STR1## where Ar is an aromatic hydrocarbon radical containing from one to three rings; R.sub.1 and R.sub.2 are the same or different and are selected from the group consisting of hydrogen, alkyl hydrocarbon radicals, methylene-bridged benzophenone radicals, salts of methylene-bridged benzophenone, methylene-bridged fluorenone radicals and salts of methylene-bridged fluorenone; and M is selected from the group consisting of lithium, potassium, sodium, alkyl magnesium, and alkyl zinc.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: July 29, 1986
    Assignee: Hercules Incorporated
    Inventor: Glenn M. Tom
  • Threaded polar openings for composite pressure vessels
    Patent number: 4602480
    Abstract: A composite pressure vessel having a large diameter, threaded polar opening with integrally depending threads is disclosed. The threaded polar opening is reinforced by a winding pattern that enables it to be closed against the axial forces resulting from significant internal pressures. This closure seals the interior of the pressure vessel in the tactical rocket motor case assembly disclosed.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: July 29, 1986
    Assignee: Hercules Incorporated
    Inventors: Paul W. Hill, Thomas C. White
  • Maleic modified butene copolymers
    Patent number: 4599385
    Abstract: Graft copolymers are disclosed wherein maleic acid or maleic anhydride is grafted to a poly(propylene--butene) backbone. The grafts are useful materials for adhering polypropylene to other materials.
    Type: Grant
    Filed: October 10, 1984
    Date of Patent: July 8, 1986
    Assignee: Hercules Incorporated
    Inventors: Anthony B. Clayton, Brian D. Kramer
  • Method for impregnating a thermoplastic polymer
    Patent number: 4598006
    Abstract: Disclosed is a method for impregnating a thermoplastic polymer with an impregnation material such as a fragrance or pest control agent or pharmaceutical composition. A thermoplastic polymer is impregnated by (1) dissolving an impregnation material such as a fragrance or pest control agent or pharmaceutical composition material in a volatile swelling agent maintained at or near supercritical conditions for the volatile swelling agent, (2) swelling the thermoplastic polymer by contacting it at or near supercritical conditions for the volatile swelling agent with the impregnation material-laden volatile swelling agent and then (3) reducing the pressure so that the volatile swelling agent diffuses out of the thus impregnated thermoplastic polymer.
    Type: Grant
    Filed: May 2, 1985
    Date of Patent: July 1, 1986
    Assignee: Hercules Incorporated
    Inventor: Michael L. Sand
  • Method, composition and product produced by delayed gelation in the polymerization of cycloolefins
    Patent number: 4598102
    Abstract: A composition and method for polymerization of cycloolefins using a feed stream including dialkylaluminum iodide and the cross-linked polymer produced. The polymer product may be formed by polymerization in an intricately shaped mold and/or be of ultra-low density. A trialkylaluminum compound or a dialkylaluminum chloride are preferably included with dialkylaluminum iodide.
    Type: Grant
    Filed: November 16, 1984
    Date of Patent: July 1, 1986
    Assignee: Hercules Incorporated
    Inventor: Douglas R. Leach
  • Process for lining composite vessels
    Patent number: 4596619
    Abstract: A method of making an elastomer lined composite vessel or portion of such vessel is disclosed. The method comprises causing a thin, tacky ribbon comprising an elastomer (preferably curable) to continuously so encircle a center rotational axis of a mandrel as to adjacently position and tack together integral segments of the ribbon substantially circumferentially relative to this center rotational axis thereby forming a layer of the elastomer about the mandrel; applying a shell comprising filaments and thermosettable resin to the layer of elastomer; curing the thermosettable resin (preferably in stages if the elastomer is curable with a later stage including cure of the elastomer) to provide the vessel or portion of the vessel.
    Type: Grant
    Filed: May 17, 1982
    Date of Patent: June 24, 1986
    Assignee: Hercules Incorporated
    Inventor: John D. Marks
  • N-alkyl methacrylate modified polypropylene
    Patent number: 4595726
    Abstract: Disclosed are graft copolymers of polypropylene containing 3 to 100% by weight based on the weight of the polypropylene backbone, preferably 3 to 30%, of an alkyl methacrylate moiety. These are useful as adhesives for bonding polypropylene to chlorinate-hydrocarbon polymers.
    Type: Grant
    Filed: October 4, 1984
    Date of Patent: June 17, 1986
    Assignee: Hercules Incorporated
    Inventor: Daniel W. Klosiewicz
  • Cross-linking halogenated polymers
    Patent number: 4594396
    Abstract: A cure system for halogen-containing polymers that comprises a thiourea derivative, a thiuram sulfide and an inorganic base yields stable cross-linked products with useful properties when incorporated into normal vulcanization procedures.
    Type: Grant
    Filed: December 5, 1984
    Date of Patent: June 10, 1986
    Assignee: Hercules Incorporated
    Inventor: Dominick A. Berta
  • Crosslinking composition for butyl rubber or halobutyl rubber and epihalohydrin rubber blends
    Patent number: 4591617
    Abstract: Disclosed are crosslinking compositions having both sulfur and nonsulfur curative systems which are particularly adapted for crosslinking rubber blends of (a) from about 35% to about 85% halobutyl rubber or a mixture of butyl rubber and halobutyl rubber wherein the halobutyl rubber is at least 50% by weight of the mixture and (b) from about 15% to about 65% of an epihalohydrin rubber, and to the rubber materials crosslinked therewith. The rubber materials crosslinked with these crosslinking compositions have an excellent balance of cure rate, cure state and scorch safety; have improved tire carcass adhesion and good impermeability to gases; and are useful in tire inner tubes and inner liners.
    Type: Grant
    Filed: January 14, 1985
    Date of Patent: May 27, 1986
    Assignee: Hercules Incorporated
    Inventor: Dominic A. Berta
  • Pineapple ketone 1'-alkoxyalkyl derivatives
    Patent number: 4590284
    Abstract: A compound of the general formula, ##STR1## wherein R.sub.1 and R.sub.2 independently are --H, --CH.sub.3, or --CH.sub.2 CH.sub.3 ; and R.sub.3 and R.sub.4 are independently alkyl or alkenyl of from 1 to 10 carbons, or aryl of from 6 to 10 carbons, or R.sub.4 =hydrogen.
    Type: Grant
    Filed: April 29, 1985
    Date of Patent: May 20, 1986
    Assignee: Hercules Incorporated
    Inventors: Brian Byrne, Louise M. L. Lawter
  • Butyl rubber and chlorinated rubber composition
    Patent number: 4587302
    Abstract: Disclosed are vulcanized compositions of (1) from about 80% to about 99% of a rubber material selected from the group consisting of butyl rubber, halogenated butyl rubber having from about 1% to about 3% by weight of halogen and mixtures thereof, and (2) from about 1% to about 20% of a chlorinated hydrocarbon polymer having a chlorine content of from about 30% to about 70% by weight of chlorine, said composition having good impermeability to gases and tear resistance and being useful in tire inner tubes and inner liners.
    Type: Grant
    Filed: March 25, 1985
    Date of Patent: May 6, 1986
    Assignee: Hercules Incorporated
    Inventor: Dominic A. Berta
  • Low density, polybutadiene based, wet filament winding resin
    Patent number: 4587300
    Abstract: Disclosed are wet filament winding resins that are intimate admixtures consisting essentially of polybutadiene polymers whose functionality resides solely in unsaturation, an unsaturated monomer component, a peroxide free-radical initiator and a block copolymer impact modifier. The resins have long pot lives and cure into low density resin matrices in composite structures. The resin matrices can have select mechanical properties of desired character through ingredient choice.
    Type: Grant
    Filed: June 13, 1985
    Date of Patent: May 6, 1986
    Assignee: Hercules Incorporated
    Inventor: Robert H. Valentine
  • Extrusion, conveyance, and cutting system
    Patent number: 4585600
    Abstract: An apparatus 10 that extrudes, conveys and cuts a propellant strand into precise lengths independent of strand velocity is disclosed. Cutting of the strand is accomplished by a cutter 18 having a blade mounted on a shaft which in one revolution cuts the strand. The shaft is activated after passage of the strand end past a pair of downstream optic sensors; compensation is made for cutter delay and strand velocity by having cutting activation take place in the same amount of time as it takes the strand end to pass both sensors less cutter delay.
    Type: Grant
    Filed: November 28, 1984
    Date of Patent: April 29, 1986
    Assignee: Hercules Incorporated
    Inventors: Richard A. Rollyson, Peter D. Wesson, Paul S. Zerwekh
  • Cycloolefin purification method and polymerization composition
    Patent number: 4584425
    Abstract: A high flash point cycloolefin composition, including at least 50% by weight dicyclopentadiene, the composition having a flash point of greater than 100.degree. F. and a viscosity of from about 3 cps to about 3000 cps at about 70.degree. F. and about 1 atmosphere pressure. The cycloolefin composition is used in a method of preparation of cycloolefin for polymerization by metathesis catalysis to form a substantially crosslinked thermoset polymer by: distilling the cycloolefin to form distilled cycloolefin, and contacting the distilled cycloolefin and an adsorbant.
    Type: Grant
    Filed: November 16, 1984
    Date of Patent: April 22, 1986
    Assignee: Hercules Incorporated
    Inventor: Glenn M. Tom
  • Bactericidal toothpastes
    Patent number: 4584189
    Abstract: Disclosed are dentifrice compositions comprising a cationic bactericide, water, a dental abrasive, and a hydrophobically modified hydroxyethyl cellulose thickener.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: April 22, 1986
    Assignee: Hercules Incorporated
    Inventor: Dianne P. Leipold
  • Fabricating large, thick wall, tubular structures
    Patent number: 4581086
    Abstract: This invention relates to an improvement in filament winding large, hollow, tubular structures having significant axial reinforcement in their thick walls by means including (a) using a hollow, light weight mandrel adapted to expand radially at elevated temperatures and windings of alternate layers of filamentary materials positioned substantially axially and substantially circumferentially relative to the longitudinal axis of the mandrel wherein the alternate layers are preferably in a certain thermosettable resin matrix and wound in certain fashion and (b) heating the filament wound mandrel to cure the thermosettable resin wherein heat from inside and out of the mandrel controls the cure and expansion during the heating step. The thick walls preferably incorporate graphite fibers for significant strength in the reinforcement provided by the filamentary materials.
    Type: Grant
    Filed: July 13, 1984
    Date of Patent: April 8, 1986
    Assignee: Hercules Incorporated
    Inventors: Dee R. Gill, Edward T. Hikida, Daniel M. Radice
  • Orally active tolciclate .[.(and tolnaftate).].
    Patent number: RE32145
    Abstract: It has been found that fungal diseases can be effectively treated systemically by oral administration of tolciclate .[.or tolnaftate.].. The .[.drugs.]. .Iadd.drug .Iaddend.will generally be administered in divided daily doses in the form of tablets, capsules, syrups or suspensions.
    Type: Grant
    Filed: November 5, 1984
    Date of Patent: May 13, 1986
    Assignee: Hercules Incorporated
    Inventor: Irving Shemano