Patents Represented by Attorney Robert O'Flynn O'Brien
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Patent number: 8258085Abstract: The present invention relates to compositions and use of fluidized polymer suspensions containing allyloxy linkage and its functional derivatives, and water soluble polymers for use in oil field applications as fluid additives for drilling and cementing processes.Type: GrantFiled: May 30, 2008Date of Patent: September 4, 2012Assignee: Hercules IncorporatedInventors: Mohand Melbouci, Teng-Shau Young
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Patent number: 8206553Abstract: A method of improving retention and drainage in a papermaking process is disclosed. The method provides for the addition of an associative polymer, prepared by an inverse emulsion polymerization process that utilizes multiple, discrete additions of initiator. Additionally, a process for preparation of an associative polymer, prepared by an inverse emulsion polymerization process that utilizes multiple discrete additions of initiator is disclosed.Type: GrantFiled: December 21, 2005Date of Patent: June 26, 2012Assignee: Hercules IncorporatedInventors: Robert A. Gelman, Erin A. S. Doherty
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Patent number: 8173799Abstract: A composition of a loose mass of comminuted raw cotton linter fibers has a bulk density of at least 8 g/100 ml and at least 50% of the fibers in the mass passes through a US standard sieve size #10 (2 mm opening). This composition is made by obtaining a loose mass of first cut, second cut, third cut, or mill runs raw cotton linters or mixtures thereof and comminuting the loose mass of raw cotton linters to a size wherein at least 50% pass through a US standard sieve size #10 (2 mm opening). This composition is used to make cellulose ether derivatives.Type: GrantFiled: April 13, 2004Date of Patent: May 8, 2012Assignee: Hercules IncorporatedInventors: Paul C Gillette, Thomas G. Majewicz, Arjun C. Sau
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Patent number: 8076279Abstract: The present invention is related to the use of a non-cellulosic cationically modified polysaccharide in cleaning compositions and more particularly to a surfactant based cleansing composition comprising, a surfactant, a non-cellulosic cationically modified polysaccharide and a solvent for use in personal care composition, household care composition or an institutional care composition.Type: GrantFiled: October 9, 2009Date of Patent: December 13, 2011Assignee: Hercules IncorporatedInventors: Piet Brand, Richard G. Brown, Anita N. Chan, Paquita Erazo-Majewicz, Jashawant J. Modi
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Patent number: 7981477Abstract: Pigmented coated paper is prepared by adding a water-soluble hydroxyalkylcellulose (HAC) with an alkyl moiety of 1 to 4 carbons, or water soluble alkylhydroxyalkylcellulose (AHAC) with an alkyl hydrophobe of 1 to 24 carbons to a pigmented wet coating formulation in an amount equal to or greater than 0.15 parts HAC or AHAC based on pigment content of the coating and applying the pigmented wet coating formulation to a moving paper web via roller metering size press, wherein the use of HAC or AHAC in the pigmented coating significantly reduce misting of the coating during application as compared to the control condition with no HAC or AHAC added.Type: GrantFiled: February 24, 2005Date of Patent: July 19, 2011Assignee: Hercules IncorporatedInventor: Charles L. Burdick
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Patent number: 7973004Abstract: The present invention relates to aqueous formulations useful in useful in personal care, oral care, household and institutional applications which contain polymers comprised of water soluble synthetic backbone with covalently connected hydrophobic ends can deliver ‘salt-like’ rheology to surfactant formulations containing surfactant concentrations at which thickening by salt is not effective.Type: GrantFiled: February 12, 2010Date of Patent: July 5, 2011Assignee: Hercules IncorporatedInventor: Konstantin A. Vaynberg
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Patent number: 7932309Abstract: A water-borne coating composition containing an ether derivative of raw cotton linters (RCL), a latex polymer, and water in which the ether derivative RCL provides improved rheological properties when compared to analogous cellulose ether compounds produced from more refined cellulose sources while not substantially degrading the coating composition's aesthetic qualities.Type: GrantFiled: November 2, 2006Date of Patent: April 26, 2011Assignee: Hercules IncorporatedInventors: Paul C. Gillette, Arjun C. Sau
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Patent number: 7851416Abstract: An oilfield servicing fluid composition containing an aldehyde guar produced by enzymatic oxidation of a non-derivatized, straight guar or of a guar derivative. The enzyme used to oxidize the guar to the aldehyde guar is galactose oxidase, which may be combined with catalase or catalase and peroxidase. The aldehyde guar is useful as an effective gelling agent for oilfield servicing fluids such as hydraulic fracturing fluids and stimulation fluids.Type: GrantFiled: May 18, 2007Date of Patent: December 14, 2010Assignee: Hercules IncorporatedInventors: Mohand Melbouci, Tuyen T. Nguyen, Teng-Shau Young
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Patent number: 7622427Abstract: A completion and workover fluid composition comprising, water and at least one rheology modifier and/or fluid loss control agent, and at least one other ingredient selected from the group consisting of inorganic salts, shale inhibitors, corrosion inhibitor, biocide, defoamers and finely divided solids particles (e.g., bentonite, attapulgite, sepiolite, calcium carbonate, etc.), depending upon the desired attributes, wherein the rheology modifier and/or the fluid loss control agent is an ethoxylated raw cotton linters or a modified ethoxylated raw cotton linters. The ethoxylated raw cotton linters provides comparable or better rheology and viscosity properties compared to high molecular weight commercial HECs made from purified cotton linters. These ethoxylated raw cotton linters derivatives are suitable for applications in oil-well servicing fluids, particularly to enhance functional properties of completion and workover fluids used during oil-well drilling operations.Type: GrantFiled: February 21, 2007Date of Patent: November 24, 2009Assignee: Hercules IncorporatedInventors: Arjun C. Sau, Mohand Melbouci
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Patent number: 7589051Abstract: A cationic, oxidized polysaccharide or derivative thereof that has a mean average molecular weight (Mw) having a lower limit of 50,000 and an upper limit of 1,000,000 and an aldehyde functionality content of at least 0.001 meq/gram is used in personal care and household care compositions. This cationic, oxidized polysaccharide is prepared in continuous or batch processes using hydrolytic reagents, oxidizing reagents, or combination of hydrolytic reagents and oxidizing reagents. Personal care or household care compositions are prepared by adding the cationic, oxidized polysaccharide to a personal care or household composition containing at least one active ingredient other than the cationic, oxidized polysaccharide of this invention.Type: GrantFiled: April 8, 2004Date of Patent: September 15, 2009Assignee: Hercules IncorporatedInventors: Paquita Erazo-Majewicz, Jashawant J. Modi, Zu-Feng Xu
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Patent number: 7562419Abstract: An improved process for the purification of raw cotton linters includes the cutting of a first, second, third or mill run cut raw cotton linters to a particle size that passes through a 2,500 micrometer screen and then mechanically separating the linters into clean and unclean fractions. The clean fraction contains purified cut raw cotton linters and the unclean fraction contains the impurities.Type: GrantFiled: July 13, 2005Date of Patent: July 21, 2009Assignee: Hercules IncorporatedInventors: Paul C. Gillette, Charles Ernest Hall
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Patent number: 7550542Abstract: A synthetic polymer has a water-soluble or water-swellable polymer backbone and terminal groups and/or intermediate groups of blocks of hydrophobes of alkyl- or aryl compounds containing a polymerizable cyclic monomer or a polymerizable double bond (or alkene) group or derivatives thereof. The blocks of hydrophobes are composed of two or more units of the same or different hydrophobes. These synthetic polymers are used as rheology modifiers, especially in latex paints.Type: GrantFiled: January 7, 2005Date of Patent: June 23, 2009Assignee: Hercules IncorporatedInventors: Kirill N. Bakeev, De-Kai Loo, Angie H. Ma, Tuyen T. Nguyen, Jeffrey K. Politis
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Patent number: 7531591Abstract: An aqueous dispersion includes an associative thickener based on a hydrophobically modified poly(acetal- or ketal-polyether) (HM-PAPE) and at least one viscosity reducing agent selected from ethoxylated alcohols, ethoxylated acetyleneic diols, phosphate esters, dialkyl sulfosuccinates, and mixtures thereof. This aqueous dispersion improves the incorporation of the HM-PAPEs into aqueous based protective coatings. This dispersion also improves water-borne coating compositions that optionally contain latex.Type: GrantFiled: November 8, 2005Date of Patent: May 12, 2009Assignee: Hercules IncorporatedInventors: Kirill N. Bakeev, James G. Binder, Theo Klootwijk, Dirk Kruythoff, Betty Maagdenberg-Roels, Tuyen T. Nguyen, Jeffrey K. Politis, Willimlen G. Salomons
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Patent number: 7384892Abstract: 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: GrantFiled: July 22, 2004Date of Patent: June 10, 2008Assignee: Hercules IncorporatedInventors: Mohand Melbouci, Arjun C. Sau
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Patent number: 7175740Abstract: 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: GrantFiled: March 25, 2003Date of Patent: February 13, 2007Assignee: Hercules IncorporatedInventors: 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
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Patent number: 6906133Abstract: The present invention relates to a process for making polyalkyldiallylamine-epihalohydrin resins, the resultant resins and their uses as wet strength additives for papermaking. These resins are obtained by a two step process, wherein the first step comprises the free radical polymerization or copolymerization of an alkyldiallylamine monomer in its protonated form; and the second step comprises reacting an ADAA polymer or copolymer with epihalohydrin under carefully controlled reaction conditions.Type: GrantFiled: January 3, 2003Date of Patent: June 14, 2005Assignee: Hercules IncorporatedInventors: Fang Deng, Daniel Yaodong Gan
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Patent number: 6528643Abstract: Product of esterified polysaccharides and the process of making such product. 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: GrantFiled: May 5, 2000Date of Patent: March 4, 2003Assignee: Hercules IncorporatedInventors: Huai N. Cheng, Qu Ming Gu
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Patent number: 6159721Abstract: Amine modified pectins wherein the amine is a water soluble amine, amino acid, etc. and process to catalyze the reaction of water soluble polymers having alkoxyester and carboxylic acid functionality, such as polysaccharides, with a primary or secondary amine in the presence of a protease and water.Type: GrantFiled: August 20, 1997Date of Patent: December 12, 2000Assignee: Hercules IncorporatedInventors: Huai Nan Cheng, Qu-Ming Gu, Robert G. Nickol
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Patent number: 6124124Abstract: Composition comprising oxidizable galactose type of alcohol configuration containing polymer (such as guar) which is in solid state and galactose oxidase. Application of such oxidized polymers in the papermaking process results in superior paper strength characteristics.Type: GrantFiled: December 31, 1997Date of Patent: September 26, 2000Assignee: Hercules IncorporatedInventors: Richard Lee Brady, Raymond Thomas Leibfried, Sr., Tuyen Thanh Nguyen
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Patent number: 5665830Abstract: A process of reducing the effects of moisture during storage prior to vulcanization of a vulcanizable halogen-containing polymer composition containing water, comprising blending before storage, into said vulcanizable composition, a thioester derivative of 2,5-dimercapto-1,3,4-thiadiazole crosslinking agent and polyethylene glycol, whereby the scorch time of the vulcanizable compound is not significantly affected by the water content of said composition. The invention is also directed to a vulcanizable halogen containing material and a dry pourable composition, both comprising the crosslinking agent and polyethylene glycol, as well as a process of reworking such a halogen-containing vulcanizable composition.Type: GrantFiled: July 22, 1996Date of Patent: September 9, 1997Assignee: Hercules IncorporatedInventor: Jay Bernard Class