Patents Assigned to Hercules
  • SYNTHESIS OF HIGH SOLIDS RESINS FROM AMINE TERMINATED POLYAMIDES
    Publication number: 20040198947
    Abstract: The present invention contemplates a process for forming polyaminoamide polymers formed by the reaction of a dibasic acid/ester with excess amounts of an amine; the intermediate polymer resulting therefrom; a process for synthesizing effective, high solids resins resulting from the reaction of intermediate polymers with an epihalohydrin; and the resultant high, solids resin. These resins may be used as wet strength resins in the papermaking industry.
    Type: Application
    Filed: April 1, 2003
    Publication date: October 7, 2004
    Applicant: Hercules Incorporated
    Inventor: William W. Maslanka
  • Method and apparatus for thermal bonding high elongation nonwoven fabric
    Patent number: 6752947
    Abstract: A method of forming a thermally bonded, nonwoven polypropylene fabric is provided and includes passing a web of thermally bondable skin-core polypropylene fibers through a calender nip under heat and pressure to produce a nonwoven fabric having elongation. The patterned calender roll is embossed with a plurality of spaced and staggered lands particularly dimensioned, configured and oriented to provide the desired bonding spot size and spacing between the bonding spots such that when utilized in the calender roll, an improved soft polypropylene fabric or cover sheet having a high elongation results.
    Type: Grant
    Filed: July 16, 1998
    Date of Patent: June 22, 2004
    Assignee: Hercules Incorporated
    Inventors: William Robert Lanigan, Richard J. Legare, Shiv Sibal
  • Process for increasing the dry strength of paper
    Patent number: 6723204
    Abstract: Addition of a premixed aqueous mixture of anionic dry strength resin and cationic or amphoteric starch to a paper making pulp slurry yields paper with higher dry strength than paper that is the same except that the starch and dry strength resin are added separately.
    Type: Grant
    Filed: April 8, 2002
    Date of Patent: April 20, 2004
    Assignee: Hercules Incorporated
    Inventors: Joseph Donald Van Handel, Constance K. Klaisner, John C. Gast
  • Process for making polymeric fiber
    Patent number: 6682672
    Abstract: Spinnerette including a plate including a plurality of capillaries which have capillary ends with dividers which divide each capillary end into a plurality of openings, and a process of making polymeric fiber. The process includes passing a molten polymer through a spinnerette comprising a plurality of capillaries which have capillary ends with dividers which divide each capillary end into a plurality of openings so that the molten polymer is formed into separate polymeric fibers for each opening or the molten polymer is formed into partially split fiber for each capillary, and quenching the molten polymer to form polymeric fiber.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: January 27, 2004
    Assignee: Hercules Incorporated
    Inventor: Kunihiko Takeuchi
  • Enzyme-catalyzed polyamides and compositions and processes of preparing and using the same
    Patent number: 6677427
    Abstract: A polyamide, the enzymatic reaction product of at least one polyamine and diester, and processes for preparing and using the same. In addition, processes for preparing and using the enzymatic reaction product as creping adhesives and wet strength resins to make cellulose products.
    Type: Grant
    Filed: June 13, 2000
    Date of Patent: January 13, 2004
    Assignee: Hercules Incorporated
    Inventors: Huai N. Cheng, Qu-Ming Gu, William W. Maslanka
  • Methyl acrylate-diamine based polyamide resins and processes for producing the same
    Patent number: 6667384
    Abstract: The present invention contemplates poly(aminoamide) pre-polymers, polyamide polymers, a multi-step process for the synthesis of these pre-polymers and polymers using acrylates and at least one monomer containing at least two primary amines, and the resins resulting from the reaction of the polymers with an epihalohydrin. These resins may be used as wet strength resins and creping aids in the papermaking industry as well as surface additives for wool.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: December 23, 2003
    Assignee: Hercules Incorporated
    Inventors: Qu-Ming Gu, Armin Michel, Huai Nan Cheng, William W. Maslanka, Ronald R. Staib
  • Methods for the enzymatic assembly of polynucleotides and identification of polynucleotides having desired characteristics
    Patent number: 6635453
    Abstract: The present invention provides methods of preparing large polynucleotides of arbitrary sequence and in a manner that will readily lend itself to automation. The present invention provides methods of preparing a polynucleotide having at least 200 nucleotides in either a 5′ to 3′ or 3′ to 5′ direction by ligating a plurality of oligonucleotides, the assembly of which, represents the nucleotide sequence of the desired polynucleotide. The present invention also provides libraries of polynucleotides and screening of libraries for polynucleotide members having desired properties.
    Type: Grant
    Filed: May 10, 2001
    Date of Patent: October 21, 2003
    Assignee: Hercules Incorporated
    Inventors: Simon Delagrave, Barry Marrs
  • Environmentally acceptable well cement fluid loss control additives, compositions, and methods
    Patent number: 6626992
    Abstract: Environmentally acceptable well cement fluid loss control additives, cement compositions including the additives and methods of using the compositions are provided. The environmentally acceptable fluid loss control additives are comprised of ethoxylated hydroxyethylcellulose having a reduced molecular weight.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: September 30, 2003
    Assignees: Halliburton Energy Services, Inc., Hercules Incorporated
    Inventors: Jan Pieter Vijn, Bach Dao, Mohand Melbouci
  • Esterified polysaccharide products and &bgr;-lactone ring opened ketene dimer products containing the compositions, and process of making the same
    Patent number: 6624298
    Abstract: Esterified polysaccharides and the process of making such products are disclosed. The process can be enzymatic where an enzyme is used as a catalyst for the reaction. The process can also be chemical where no enzyme is used. Novel Products are obtained through lipase-catalyzed &bgr;-lactone ring opening alcoholysis of ketene dimers and the process of making such compositions containing products.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: September 23, 2003
    Assignee: Hercules Incorporated
    Inventors: Huai N. Cheng, Qu Ming Gu
  • Environmentally acceptable fluid polymer suspension for oil field services
    Patent number: 6620769
    Abstract: This invention provides a water-free oil based fluid polymer suspension composition for use as a rheology modifier and fluid loss reducer in oil or gas well servicing fluids. It has been found that by using white medicinal oil as a carrier, high solids content and environmental friendly anhydrous fluidized polymer suspensions of xanthan gum, cellulose ethers, guar gum and derivatives thereof can be prepared. More specifically, in one aspect, an oil-based fluid polymer suspension (FPS) composition for use in oil or gas well servicing fluids is preferred containing: a) a hydrophilic polymer, b) an organophilic clay, c) a stabilizer, and d) a white medicinal oil having selected properties.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: September 16, 2003
    Assignee: Hercules Incorporated
    Inventors: Herbert L. Juppe, Robert P. Marchant, Mohand Melbouci
  • Methyl acrylate-diamine based polyamide resins and processes for producing the same
    Publication number: 20030153722
    Abstract: The present invention contemplates poly(aminoamide) pre-polymers, polyamide polymers, a multi-step process for the synthesis of these pre-polymers and polymers using acrylates and at least one monomer containing at least two primary amines, and the resins resulting from the reaction of the polymers with an epihalohydrin. These resins may be used as wet strength resins and creping aids in the papermaking industry as well as surface additives for wool.
    Type: Application
    Filed: December 27, 2001
    Publication date: August 14, 2003
    Applicant: Hercules Incorporated
    Inventors: Qu-Ming Gu, Armin Michel, H. N. Cheng, William W. Maslanka, Ronald R. Staib
  • Derivatized microfibrillar polysaccharide
    Patent number: 6602994
    Abstract: A method for producing derivatized microfibrillar polysaccharide, including but not limited to cellulose, derivatized by steric and/or electrostatic forces, where the electrostatic forces are provided by anionic charge or by a combination of both anionic and cationic charge, by stabilizing and/or microfibrillating a polysaccharide starting material. A method of modifying the rheological properties of a composition of matter using derivatized microfibrillar polysaccharide. Method of improving coatings, paper manufacture, and the stability of emulsions, dispersions, and foams using a derivatized microfibrillar polysaccharide. Compositions that include derivatized microfibrillar polysaccharide, including paper compositions, comestible compositions, non-comestible spreadable compositions, and emulsions, dispersion, and foams.
    Type: Grant
    Filed: February 10, 1999
    Date of Patent: August 5, 2003
    Assignee: Hercules Incorporated
    Inventors: Mary Jean Cash, Anita N. Chan, Herbert Thompson Conner, Patrick Joseph Cowan, Robert Alan Gelman, Kate Marritt Lusvardi, Samuel Anthony Thompson, Frank Peine Tise
  • Highly compressible ethylcellulose for tableting
    Patent number: 6592901
    Abstract: A pharmaceutical dosage form composition is composed of an ethylcellulose that has an ethoxyl range lower limit of 49.6%, an a viscosity of less than 53 cps and at least one active pharmaceutical ingredient. This dosage form is highly compressible and compactible forming harder tables or pellets with better release retardation than comparable prior art tablets.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: July 15, 2003
    Assignee: Hercules Incorporated
    Inventors: Thomas Durig, Ronald Haywood Hall, Richard A. Salzstein
  • Polymeric fluid loss additives and method of use thereof
    Patent number: 6590050
    Abstract: The present invention relates to compositions and use of water-soluble or water-dispersible copolymers for oil field applications. Specifically, the present invention relates to polymers containing allyloxy linkage andits functional dervatives for use in oil field applications as fluid additives for drilling and cementing processes.
    Type: Grant
    Filed: August 20, 2002
    Date of Patent: July 8, 2003
    Assignee: Hercules Incorporated
    Inventors: Keith A. Bair, Fu Chen, Mohand Melbouci, Teng-Shau Young, De-Kai Loo
  • Compositions for imparting desired properties to materials
    Patent number: 6586520
    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; and component (B) which comprises at least one film-forming material. In particular the composition is a coating composition comprises: (A) at least one polyamidoamine-epihalohydrin resin; and (B) at least one material selected from flexibilizing materials, crosslink inhibiters and combinations thereof in an amount sufficient to impart a cuttability value of less than about 15 to a substrate coated with the coating composition. Component (B) is preferably at least one polymer comprising repeating units derived from an alkyl halide having at least one double bond and an alkene, such as ethylene vinyl chloride.
    Type: Grant
    Filed: July 10, 2000
    Date of Patent: July 1, 2003
    Assignee: Hercules Incorporated
    Inventors: James Canorro, Robert A. Gelman, Matthew B. Howle, Andrea Keys, JoAnne Lefever, William W. Maslanka, Jeffrey I. Melzer, Kevin M. Mottern, Michael T. Raab, William Rodriquez, Richard A. Stuhrke, Jennifer E. Steed, Robert G. Szewczyk
  • Fluid abrasive suspension for use in dentifrices
    Patent number: 6562090
    Abstract: A fluid abrasive suspension composition has an abrasive, suspending vehicle, and a water-swellable or water-soluble polymer. This composition is used to make a stable dentifrice formulation.
    Type: Grant
    Filed: August 28, 2000
    Date of Patent: May 13, 2003
    Assignee: Hercules Incorporated
    Inventors: Mohand Melbouci, Jashawant J. Modi
  • Non-aqueous release from paper machine equipment
    Patent number: 6558513
    Abstract: Disclosed is a method of improving the release of paper webs from the surface of press rolls or other paper making or converting equipment by applying to such a surface non-aqueous, non-curing hydrocarbon polymer compositions. The non-curing hydrocarbon polymers have the formula (CH3)3C—[—C(R1)(R2)—C(R3)(R4)—]n—C(R5)═C(CH3)2 (I) wherein R1 through R5 are hydrogen or —CH3, with at least one of R1 through R4 being —CH3, and n is such that the number average molecular weight of such hydrocarbon polymers is from 50 to 3000. They may be hydrogenated. Preferred non-curing hydrocarbon polymers are polybutenes of the formula (CH3)3C—[—CH2—C(CH3)2—]n—CH═C(CH3)2 (II). Preferred compositions comprise at least one such hydrocarbon polymer component having a number average molecular weight from 400 to 700 and a second such component having a number average molecular weight of 100 to 400.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: May 6, 2003
    Assignee: Hercules Incorporated
    Inventors: Jacqueline K. Pease, William A. Hendriks
  • Reduced byproduct polyamine-epihalohydrin resins
    Patent number: 6554961
    Abstract: Processes for rendering a polyamine-epihalohydrin resin storage stable, including processes that prepare a storage stable resin and/or processes that treat resins. A composition containing a polyamine-epihalohydrin resin which includes CPD-forming species can be treated with at least one agent under conditions to at least one of inhibit, reduce and remove the CPD-forming species to obtain a reduced CPD-forming resin so that a composition containing the reduced CPD-forming polyamine-epihalohydrin resin when stored for 2 weeks at 50° C., and a pH of about 2.5 to 3.5 contains less than about 250 ppm dry basis of CPD. The invention is also directed to a gelation storage stable reduced CPD-forming resin so that a composition containing the reduced CPD-forming polyamine-epihalohydrin resin, when stored at pH 1 for 24 hours at 50° C. and measured at 24 hours, produces less than about 1000 ppm dry basis of CPD.
    Type: Grant
    Filed: June 12, 2000
    Date of Patent: April 29, 2003
    Assignee: Hercules Incorporated
    Inventors: Richard James Riehle, Anthony J. Allen, Michaela Hofbauer, Alfred Jacques Haandrikman, Ronald Busink, Mark T. Crisp, John James Hoglen, Huai Nan Cheng, Francis J. Carlin, Jr., John Arthur Lapre, Harold Jabloner
  • Methods of using hop acids to control organisms
    Patent number: 6547971
    Abstract: Methods of inhibiting the growth of organisms in aqueous systems such as papermaking systems, cooling systems and process waters of various types, comprises adding to the aqueous system a hop acid. Compositions comprising hop acids and papermaking suspensions or slurries, and/or additives, such as paper making additives, are also provided.
    Type: Grant
    Filed: March 8, 2000
    Date of Patent: April 15, 2003
    Assignee: Hercules Incorporated
    Inventors: Alexander W. Breen, John M. Cronan, Jr., Phillip S. Davis, Michael J. Mayer, Freddie L. Singleton
  • Acetoacetylated saccharides and process of making the same
    Patent number: 6528644
    Abstract: A product of acetoacetylated saccharide and the process of making such a product. The process is enzymatic where an enzyme is used as a catalyst for the reaction. The enzymatic process provides better yields and milder process conditions compared to other chemical synthesis process without any enzyme.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: March 4, 2003
    Assignee: Hercules Incorporated
    Inventors: Peng George Wang, Wenhua Xie, Lei Qiao, Robert G. Nickol, Huai N. Cheng