Patents Assigned to Hercules
  • Publication number: 20090098387
    Abstract: The disclosure relates to an adhesive composition for bonding lignocellulosic substrates. The adhesive composition contains a crosslinker and a non-urea diluent where the non-urea diluent is present in an amount from about 0.01 to about 75 weight % based on the total wet weight of the composition and where the crosslinker contains essentially no formaldehyde. Also disclosed is the adhesive further containing. an aqueous mixture of a protein source. The disclosure also relates to a process for making lignocellulosic composites utilizing the disclosed adhesive composition and to the lignocellulosic composites made using the disclosed process.
    Type: Application
    Filed: October 9, 2008
    Publication date: April 16, 2009
    Applicant: Hercules Incorporated
    Inventors: Richard L. Brady, Qu-Ming Gu, Ronald R. Staib
  • Patent number: 7507781
    Abstract: A papermaking method and a composition which utilize, as a drainage aid, a water-soluble anionic copolymer prepared via a water-in-oil polymerization technique that, absent a cross-linking agent, is characterized by a Huggins' constant (k?) determined in 0.01M NaCl greater than 0.75 and a storage modulus (G?) for a 1.5 wt. % actives polymer solution at 4.6 Hz greater than 175 Pa.
    Type: Grant
    Filed: July 23, 2007
    Date of Patent: March 24, 2009
    Assignee: Hercules Incorporated
    Inventors: Brian Walchuk, Fushan Zhang, John C. Harrington, William Sean Carey, Richard Lee Brady
  • Publication number: 20080292886
    Abstract: Compositions suitable for use as wood adhesives are described, which compositions comprise: (a) a polymeric component selected from the group consisting of lignins, proteins, and mixtures thereof, (b) an adhesion promoter comprising at least one component selected from the group consisting of (i) adducts of an epoxide and a resin selected from the group consisting of polyamine resins, polyamidoamine resins, polyamide resins, and combinations thereof, and (ii) combinations of a curing agent and a compound having at least one amine, amide, imine, imide, or nitrogen-containing heterocyclic functional group capable of reacting with at least one functional group of the polymeric component; and (c) an additive selected from the group consisting of urea, N-substituted ureas, N,N-disubstituted ureas, N,N?-disubstituted ureas, N,N,N?-trisubstituted ureas, N,N,N?,N?-tetrasubstituted ureas, urea derivatives, and mixtures thereof.
    Type: Application
    Filed: March 19, 2008
    Publication date: November 27, 2008
    Applicant: Hercules Inc.
    Inventors: Anthony J. Allen, Richard J. Riehle, Joseph Marcinko
  • Publication number: 20080255320
    Abstract: Polyamidoamine (PAE) resins are prepared from polyamidoamine made with excess amine, which are reacted with a specifically defined amount of difunctional crosslinker. The amount of difunctional crosslinker used is based on the polyamidoamine amine number and reduced specific viscosity (RSV). The PAE resin is prepared by first synthesizing a polyamidoamine from a polyamine and a polycarboxylic acid or polycarboxylic acid derivative, wherein the polyamine is present in a molar excess, said molar excess being from about 1.02 to 2.00, then reacting the polyamidoamine with difunctional crosslinker, wherein the weight % of difunctional crosslinker to polyamidoamine solids is no more than about 0.308(amine number/RSV)—9.18 or 385(amine number/RSV)—5.20, wherein the amine number is expressed as the milliequivalents of amine per gram of polyamidoamine solids and the RSV is the reduced specific viscosity measured at 2% concentration in 1 M NH4Cl expressed in deciliters per gram.
    Type: Application
    Filed: January 18, 2008
    Publication date: October 16, 2008
    Applicant: Hercules Inc.
    Inventor: Anthony J. Allen
  • Patent number: 7435359
    Abstract: An anti-corrosion composition for use with a liquid or the liquid resulting from the addition of components is provided. The composition can include an acid, a phosphate ester of an alcohol, an inorganic phosphate, a salt of polyacrylates and a salt of an organophosphonate. The composition can be used with anti-freeze compositions or heat transfer fluids and advantageously exhibits enhanced corrosion resistance properties. A heat transfer medium is also provide, having water, glycol, an ester of a phosphoric acid, a phosphate salt and an acid, wherein the medium is a GRAS composition capable of satisfying ASTM 1384 and 4340.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: October 14, 2008
    Assignee: Hercules Chemical Company Incorporated
    Inventor: Fred R. Scholer
  • Patent number: 7434812
    Abstract: Generally speaking, in accordance with the invention, a putty is provided that can include many or all of the handling characteristics of a traditional plumber's putty, but with reduced staining qualities. Such putty can facilitate substantially stain free installations. Putties in accordance with the invention can contain combinations of polymers or oligomers, solvents, fillers and optional rubbery materials. A composition according to the invention is preferably sufficiently stain-free to be used on porous stone, such as marble and granite, without damaging the appearance of the stone. This is achieved by eliminating oil completely, or at least substantially, or restricting their ability to cause stains sufficiently. Because compositions of the invention can be made to be free of oils, they can also have the effect of eliminating the greasy feeling to the hands, which can occur when handling traditional putty.
    Type: Grant
    Filed: November 23, 2005
    Date of Patent: October 14, 2008
    Assignee: Hercules Chemical Company Incorporated
    Inventors: John Wrobleski, Fred Richard Scholer
  • Patent number: 7429625
    Abstract: A method to invert an inverse emulsion water compatible polymer product using a combination of surfactants that have specific chemical structures is disclosed. A combination, or blend, of two or more surfactants provides for an effective breaker system. The blend of surfactants is more effective than the individual surfactants.
    Type: Grant
    Filed: December 14, 2004
    Date of Patent: September 30, 2008
    Assignee: Hercules Incorporated
    Inventors: John C. Harrington, Robert A. Gelman, K. Abraham Vaynberg
  • Patent number: 7421670
    Abstract: A system and method for implementation of look-ahead design methodology. Efficient debugging of a design is accomplished by evaluating the high level register transfer level (RTL) representation of a device being designed by quickly simulating the downstream implementation of that device to expose potential implementation problems that would otherwise be found much later in the design or manufacturing cycle.
    Type: Grant
    Filed: October 28, 2005
    Date of Patent: September 2, 2008
    Assignee: Hercules Technology Growth Capital, Inc.
    Inventor: Bernard Murphy
  • Publication number: 20080181815
    Abstract: Haloamine biocides are prepared via multi-step processes in an integrated apparatus comprising an electrochemical cell and a mixing chamber, wherein active halogen donor species are electrochemically generated and subsequently reacted with amine-containing compositions to form haloamine biocide. Haloamine biocides prepared according to such processes are used to treat liquids in order to inhibit, reduce, and/or control microorganism growth therein.
    Type: Application
    Filed: January 25, 2007
    Publication date: July 31, 2008
    Applicant: Hercules Inc.
    Inventors: Huai N. Cheng, David E. Sharoyan, Freddie L. Singleton, Michael J. Mayer
  • Publication number: 20080169073
    Abstract: Methods for inhibiting the depositions of organic contaminants from pulp in pulp and papermaking systems are disclosed. A combination of an enzyme and a nonionic polymeric detackifier are added to the pulp or applied to deposition-prone process equipment surfaces of a pulp and papermaking system.
    Type: Application
    Filed: November 5, 2007
    Publication date: July 17, 2008
    Applicant: Hercules Inc.
    Inventors: Zu-Feng Xu, William S. Carey
  • Patent number: 7396874
    Abstract: A papermaking method and a composition which utilize, as a drainage aid, a water-soluble cationic or amphoteric copolymer prepared via a water-in-oil polymerization technique that, absent a cross-linking agent, is characterized by a Huggins' constant (k?) determined in 0.01M NaCl greater than 0.3 and a storage modulus (G?) at 6.3 Hz greater than 50 Pa.
    Type: Grant
    Filed: December 4, 2003
    Date of Patent: July 8, 2008
    Assignee: Hercules Incorporated
    Inventors: Martha Hollomon, Brian L. Walchuk, Frank J. Sutman
  • Patent number: 7384892
    Abstract: A water-based drilling fluid composition includes water and at least one rheology modifier and/or fluid loss control agent, and at least one other ingredient of polymeric additive, inorganic salts, dispersants, shale stabilizers, weighting agents, or finely divided clay particles, depending upon the desired attributes, wherein the rheology modifier and/or the fluid loss control agent comprises carboxymethylated raw cotton linters (CM-RCL) made from the baled raw cotton linters or comminuted raw cotton linters with increased bulk density.
    Type: Grant
    Filed: July 22, 2004
    Date of Patent: June 10, 2008
    Assignee: Hercules Incorporated
    Inventors: Mohand Melbouci, Arjun C. Sau
  • Publication number: 20080066881
    Abstract: This invention relates to a process for preparing polyamine-epihalohydrin resins having reduced levels of residuals. The process comprises (a) charging a membrane separation apparatus with an aqueous composition comprising at least one polyamine-epihalohydrin resin, and (b) separating the aqueous composition into a permeate and a retentate by passing the aqueous composition through the membrane of the membrane separation apparatus. The retentate comprises at least one polyamine-epihalohydrin resin having lower levels of residuals on an equal active component basis than the aqueous composition of (a). The permeate comprises residuals removed from the aqueous composition of (a) and less than 5% by weight of the active component of said at least one polyamine-epihalohydrin resin. The polyamine-epihalohydrin resins having reduced levels of residuals can be used to make wet strength agents, dry strength agents, creping adhesives for paper products, curing agents for wood product adhesives, and other products.
    Type: Application
    Filed: September 17, 2007
    Publication date: March 20, 2008
    Applicant: Hercules Inc.
    Inventors: Richard J. Riehle, Stephen Vinciguerra
  • Patent number: 7317053
    Abstract: The present invention relates to aqueous compositions comprising component (A) which comprises at least one water-soluble component comprising at least one functional group that undergoes a crosslinking reaction, preferably upon drying and/or heating; component (B) which comprises at least one film-forming material, preferably a latex material; and component (C) which comprises at least one component that provides at least one of moisture and/or water barrier properties and/or vapor barrier properties greater than that provided by the combination of components (A) and (B) alone.
    Type: Grant
    Filed: July 10, 2000
    Date of Patent: January 8, 2008
    Assignee: Hercules Incorporated
    Inventors: Robert A. Gelman, Matthew B. Howle, Andrea Keys, William W. Maslanka, Jeffrey I. Melzer, Michael T. Raab, Richard A. Stuhrke, Robert G. Szewczyk
  • Patent number: 7311878
    Abstract: An apparatus and methods to produce synergistic mixtures (or combinations) of haloamines to control growth of microorganisms in aqueous systems are disclosed. The apparatus and methods to produce synergistic mixtures entails producing a batch quantity of a haloamine and converting part of the haloamine to a second haloamine species to form the synergistic mixture.
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: December 25, 2007
    Assignee: Hercules Incorporated
    Inventors: Freddie L. Singleton, Michael J. Mayer, Alexander W. Breen
  • Patent number: 7306702
    Abstract: Methods for reducing or inhibiting deposition on or within press felts to increase the effective life of the press felt and reduce or eliminate the need for batch cleaning are disclosed. The methods disclosed treat press felt while paper is being produced with compositions containing at least one enzyme. Additionally, the enzymes can be applied in combination with other non-enzymatic felt conditioning products either by blending and applying at the same application point or by applying the enzyme and the non-enzymatic felt conditioning product at two different locations along the felt. The treatments are applied continuously or intermittently.
    Type: Grant
    Filed: April 11, 2003
    Date of Patent: December 11, 2007
    Assignee: Hercules Incorporation
    Inventors: Jacqueline K. Pease, G. Gunar McKendree, Freddie L. Singleton, George S. Thomas
  • Patent number: 7303652
    Abstract: A process for rendering a polyamine-epihalohydrin resin storage stable, is described. The process entails treating a polyamine-epihalohydrin resin composition, where the resin is formed in a reaction having a molar ratio of epihalohydrin to secondary amine group of less than about 0.5 and where the composition has a solids content of at least 15 wt % and includes CPD-forming species, with at least one enzymatic agent under conditions to inhibit, reduce or remove the CPD-forming species to obtain a gelation storage stable reduced CPD-forming resin so that the composition containing the reduced CPD-forming polyamine-epihalohydrin resin when stored for 24 hours at 50° C. and a pH of about 1.0 releases less than about 100 ppm dry basis of CPD.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: December 4, 2007
    Assignee: Hercules Incorporated
    Inventors: Richard James Riehle, Ronald Busink, Massimo Berri, Wilm Stevels
  • Patent number: 7270727
    Abstract: Sized paper containing an amphoteric promoter resin that is a polymerization reaction product of a quaternary diallylammonium monomer, optionally a diallylammonium monomer, and an unsaturated organic acid is described. The method of sizing paper with such amphoteric promoter resin compound and a sizing agent provides sized paper with significantly improved sizing property characteristics, and the sized paper exhibits superior retention of brightness due to added optical brighteners.
    Type: Grant
    Filed: April 28, 2003
    Date of Patent: September 18, 2007
    Assignee: Hercules Incorporated
    Inventor: Daniel F. Varnell
  • Patent number: 7271308
    Abstract: The present invention relates to embodiments for a process for the isomerization of at least one alpha olefin to an internal olefin via a multi-step process resulting in a mixture comprising alkene isomers and a low level of oligomers. According to the present invention an alkylaluminum compound is used in combination with the Group VIII transition metal salt for interaction with the latter, and thereby generating catalytically active species for the isomerization of 1-alkenes to internal alkenes, wherein this mixture is subsequently combined with an acid washed clay.
    Type: Grant
    Filed: October 19, 2004
    Date of Patent: September 18, 2007
    Assignee: Hercules Incorporated
    Inventor: Jian Jian Zhang
  • Patent number: 7250448
    Abstract: A papermaking method and a composition which utilize, as a drainage aid, a water-soluble anionic copolymer prepared via a water-in-oil polymerization technique that, absent a cross-linking agent, is characterized by a Huggins' constant (k?) determined in 0.01M NaCl greater than 0.75 and a storage modulus (G?) for a 1.5 wt. % actives polymer solution at 4.6 Hz greater than 175 Pa.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: July 31, 2007
    Assignee: Hercules Incorporated
    Inventors: Brian Walchuk, Fushan Zhang, John C. Harrington, William Sean Carey, Richard Lee Brady