Patents Represented by Attorney, Agent or Law Firm Ralph J. Mancini
  • Process for the production of paper
    Patent number: 6103064
    Abstract: The invention relates to a process for the production of paper from a suspension of cellulose containing fibres, and optional fillers, which comprises adding a water-soluble cationic or amphoteric branched acrylamide-based polymer and an anionic aluminium-containing silica sol to the suspension and forming and draining the suspension on a wire.
    Type: Grant
    Filed: May 13, 1998
    Date of Patent: August 15, 2000
    Assignee: Eka Chemicals AB
    Inventors: Anna Asplund, Kjell Andersson, Erik Lindgren
  • Process for the production of paper
    Patent number: 6100322
    Abstract: The invention relates to a process for the production of paper from a suspension of cellulose containing fibers, and optional fillers, comprising adding to the suspension a low molecular weight cationic organic polymer, a high molecular weight cationic or amphoteric polymer and anionic inorganic particles, forming and draining the suspension on a wire, wherein the low molecular weight polymer has a molecular weight below 700,000 and the high molecular weight polymer has a molecular weight above 1,000,000, said polymers being simultaneously added to the suspension.
    Type: Grant
    Filed: October 2, 1998
    Date of Patent: August 8, 2000
    Assignee: Eka Chemicals AB
    Inventors: Michael Persson, Joakim Carlen, Hans Johansson, Carlos Cordoba
  • Anti-terror bollard
    Patent number: 6099200
    Abstract: An energy absorbing, retractable security barrier used to stop the movement of vehicles. The device is employed to control access to entranceways, driveways, roads and to secure a security perimeter around buildings and objects requiring such protection. The device consists of a reinforced telescoping bollard inserted into a foundation casing which is imbedded below ground. The device is manually operated and is extended by a self-contained gas-charged spring lift mechanism. The device contains a locking mechanism for securing the telescoping bollard in the extended and retracted positions. When in the retracted position the bollard is flush with the surface and can be traversed by a vehicle. The device is of simple design, easily installed and easily maintained.
    Type: Grant
    Filed: October 2, 1998
    Date of Patent: August 8, 2000
    Inventors: John J. Pepe, Klaus Goeken
  • Sizing of paper
    Patent number: 6093217
    Abstract: The invention relates to an aqueous dispersion containing a cellulose-reactive sizing agent and an anionic hydrophobically modified cellulose-derivative, its preparation and use in the production of paper. The invention also relates to a substantially water-free composition containing a cellulose-reactive sizing agent and an anionic hydrophobicity modified cellulose-derivative, its preparation and use in the preparation of an aqueous dispersion cellulose-reactive sizing agent. The invention further relates to a process for sizing cellulosic fibers by addition of an aqueous sizing dispersion containing a cellulose-reactive sizing agent and a hydrophobically modified dispersing agent to a stock containing cellulosic fibers, and optional fillers, and dewatering the stock on a wire to obtain a web containing cellulosic fibers.
    Type: Grant
    Filed: February 3, 1998
    Date of Patent: July 25, 2000
    Assignee: Akzo Nobel N.V.
    Inventors: Sten Frolich, Erik Lindgren, Rein Sikkar
  • Process for making solid compositions comprising quaternary ester ammonium compounds and fatty acids
    Patent number: 6093336
    Abstract: A process is disclosed for making a solid composition comprising at least one quaternary ester ammonium compound and at least one substantially saturated fatty acid compound, a solid composition obtainable by that process, and a solid composition containing essentially more than 50 wt % of at least one quaternary ester ammonium compound, at most 50 wt % of at least one substantially saturated fatty acid compound, and less than 5.5 wt % of impurities.
    Type: Grant
    Filed: November 23, 1998
    Date of Patent: July 25, 2000
    Assignee: Akzo Nobel nv
    Inventors: Jan Joseph Hubert Ploumen, Kornelis Overkempe, Paulus Gerhardus Johannes Nieuwenhuis
  • Surface sizing of cellulose based products
    Patent number: 6087457
    Abstract: The invention relates to a method of surface sizing cellulose based products such as paper, board and paper board. The method comprises applying to the surface of said products an aqueous dispersion of a copolymer obtainable by free-radical emulsion polymerization of a monomers mixture comprising at least one monomer selected from the group consisting of styrene and derivatives thereof; at least one monomer selected from the group consisting of esters of ethylenically unsaturated carboxylic acids and alkanols; and at least one monomer selected from the group consisting of ethylenically unsaturated carboxylic and sulfonic acids and salt thereof; optionally in combination with other ethylenically unsaturated copolymerizable monomers.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: July 11, 2000
    Assignee: Eka Chemicals AB
    Inventor: Yi-Guan Tsai
  • Absorbent material and production thereof
    Patent number: 6083347
    Abstract: The present method generally relates to a method for production of absorbent material having improved sorptive capacity, which material comprises cellulosic fibres, wherein said method comprises treating said fibres, in the presence of water, with a hydrophobic substance having a specific surface area of at least 50 m.sup.2 /g, wherein the treatment comprises contacting said substance and said fibres together when the fibres have a dry content of at least 20%.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: July 4, 2000
    Assignee: Eka Chemicals AB
    Inventors: Ingemar Thebrin, Svante W.ang.hlen, Erik Lindgren, Kerstin Malmborg
  • Alkaline detergent having high contents of nonionic surfactant and complexing agent, and use of an amphoteric compound as solubilizer
    Patent number: 6080716
    Abstract: The present invention relates to the use of an amphoteric compound as solubilizer and discloses an alkaline concentrate in the form of a clear aqueous solution which, after diluting with water, is suitable for use as detergent and which contains as least 4% by weight of a nonionic alkoxylate surfactant containing 2-12, preferably 3-10 alkyleneoxy groups having 2-4 carbon atoms, at least 50% of the alkyleneoxy groups being ethyleneoxy groups, at least 13% of a complexing agent, and 1-15% by weight of an amphoteric compound.
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: June 27, 2000
    Assignee: Akzo Nobel N.V.
    Inventors: Rolf Skold, Gunvor Karlsson, Karin Hammarstrand
  • Solid composition comprising an amphoteric surfactant, a process for its preparation, and the use thereof
    Patent number: 6080714
    Abstract: The invention relates to a solid composition comprising a hygroscopic amphoteric surfactant and a fatty acid which is substantially free from other detergents and/or detergent additives. Preferably, the fatty acid is a linear, saturated C.sub.6 -C.sub.22 acid. The weight ratio of amphoteric surfactant to fatty acid in said composition preferably is from 4:1 to 1:2. Examples of amphoteric surfactants include amine oxides and betaines. The solid composition of the invention may be shaped into a particulate form, such as granules. The invention further pertains to a process for preparing said composition and to the use of same, for example, in soap bars.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: June 27, 2000
    Assignee: Akzo Nobel NV
    Inventors: Kornelis Overkempe, Jan Joseph Hubert Ploumen
  • Polyelectrolyte composition
    Patent number: 6077887
    Abstract: An aqueous composition is described, which is characterised in that it comprises comprises a water-soluble electrolyte complex containing a combination of a water-soluble, anionic polyelectrolyte with hydrophobic groups having 6-30 carbon atoms, and a water-soluble cationic polyelectrolyte with hydrophobic groups having 6-30 carbon atoms. The polyelectrolyte composition can be used as thickening agent in water-based systems, such as paints, coating slips, cosmetics or cleaning compositions, and as water-binding agent in sanitary products, e.g. nappies, sanitary towels and the like.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: June 20, 2000
    Assignee: Akzo Nobel Surface Chemistry AB
    Inventor: Krister Thuresson
  • Process for froth flotation of silicate-containing iron ore
    Patent number: 6076682
    Abstract: The present invention relates to a process for enriching an iron mineral from a silicate-containing iron ore by carrying out, at a pH of 8-11, a froth flotation in the presence of a depressing agent for the iron mineral and a collecting agent containing a combination of an ether monoamine and an ether polyamine, which contain an aliphatic hydrocarbon group having 6-22 carbon atoms in a weight ratio of the ether monoamine to the ether polyamine of 1:4-4:1. The invention also discloses a composition which is suitable for use in the process.
    Type: Grant
    Filed: November 25, 1998
    Date of Patent: June 20, 2000
    Assignee: Akzo Nobel N.V.
    Inventors: Jan Olof Gustafsson, Anders Klingberg
  • Method for reducing the content of organic solvent in cellulose-reactive hydrophobing agents
    Patent number: 6074529
    Abstract: The present invention generally relates to a method for reducing the content of organic solvent in an aqueous dispersion of a cellulose-reactive hydrophobing agent, prepared by emulsifying a molten cellulose-reactive hydrophobing agent containing organic solvent in an aqueous solution containing one or more emulsifying agents. The method comprises contacting the aqueous dispersion under agitation with a sorbent, said sorbent having the capacity of absorbing organic molecules, or a gas, whereby the solvent is transferred to the sorbent or the gas.
    Type: Grant
    Filed: February 23, 1998
    Date of Patent: June 13, 2000
    Assignee: Eka Nobel AB
    Inventors: Erik Lindgren, Jeppe Magnusson
  • Binder composition and process for agglomerating particulate material
    Patent number: 6071325
    Abstract: The present invention generally relates to a process of agglomerating particulate material in the presence of water which comprises mixing said particulate material with a binding effective amount of at least one water soluble polymer, and a binder enhancing effective amount of caustic, to produce a mixture, and forming said mixture into agglomerates. The invention also relates to a binder composition useful for the agglomeration of particulate material in the presence of water which comprises a binding effective amount of a water-soluble polymer and a binder enhancing effective amount of caustic.
    Type: Grant
    Filed: July 16, 1997
    Date of Patent: June 6, 2000
    Assignee: Akzo Nobel nv
    Inventor: James Schmitt
  • Zinc carboxylic acid complexes in sulfur-vulcanized rubber compositions
    Patent number: 6046280
    Abstract: A rubber composition which is the vulcanization reaction product of a rubber, sulfur or a sulfur donor, particular anti-reversion coagents, and an effective amount of zinc, complexed with at least one carboxylic acid group, is disclosed. The invention also relates to a sulfur-vulcanization process which is carried out in the presence of an anti-reversion coagent and the complexed zinc and the use of an anti-reversion coagent in combination with the complexed zinc in a process for the sulfur-vulcanization of rubber. The resulting sulfur-vulcanized rubbers have significantly improved physical properties.
    Type: Grant
    Filed: November 13, 1995
    Date of Patent: April 4, 2000
    Assignee: Akzo Nobel nv
    Inventors: Rabindra Nath Datta, Arie Jacob de Hoog, Johannes Hermanus Wilbrink
  • High di(alkyl fatty ester) quaternary ammonium compounds in fabric softening and personal care compositions
    Patent number: 6037315
    Abstract: The present invention generally relates to a textile softening composition which comprises, as the softening agent, a quaternary ammonium salt which comprises a mixture of mono-, di- and tri-ester components, wherein the amount of diester quaternary is greater than about 50% by weight, and the amount of triester quaternary is less than about 25% by weight based on the total amount of quaternary ammonium salt. The invention also relates to a softening agent which comprises a high diester quaternary ammonium salt mixture comprising mono- and diester components derived for ether dialkanolamines. The invention also relates to processes for preparing said softening agents, and methods of use as a fabric softener and as a hair and skin conditioner.
    Type: Grant
    Filed: December 4, 1997
    Date of Patent: March 14, 2000
    Assignee: Akzo Nobel NV
    Inventors: Ralph Franklin, Robert Mendello, Paul Albert Iacobucci, Dale Steichen, Phuong-Nga Trinh, Maurice Dery
  • Concrete mixture which yields concrete having high strength at varying density, method for producing the mixture and the concrete, and use of an anionic additive
    Patent number: 6022407
    Abstract: An aqueous concrete mixture having an air pore volume between 10 and 85%, preferably between 20 and 85%. When the aqueous concrete mixture is cured, a concrete having uniform density and high strength is obtained. This is achieved by including in the concrete mixture an aqueous, anionic surface-active compound containing two sulphonic acid groups of the general formula(R).sub.m --R.sub.1 --(SO.sub.3 M).sub.2 (1)wherein R is an aliphatic group having 4-20 carbon atoms, m is a number 1 or 2, the sum of the number of carbon atoms in the 1 or 2 R groups being 6-30, R.sub.1 is an aromatic group containing at least 2 aromatic rings and 10-20 carbon atoms, and M is a cation or hydrogen. The anionic compound has an air-entraining effect and improves the homogeneity of the concrete mixture.
    Type: Grant
    Filed: February 4, 1999
    Date of Patent: February 8, 2000
    Assignees: Akzo Nobel Surface Chemistry AB, Senad Teknikbetong AB
    Inventors: Kjell Stridh, Ingemar Johansson, Kjell Svedman, Marita Naslund
  • Method for producing aminoethylethanolamine and/or hydroxyethyl piperazine
    Patent number: 6013801
    Abstract: A method for preparing aminoethylethanolamine, and/or hydroxyethylpiperazine is described. Reaction of ethylene oxide with ethylendiamine, piperazine, or a mixture of both produces these compounds.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: January 11, 2000
    Assignee: Akzo Nobel N.V.
    Inventors: Juhan Koll, deceased, Magnus Frank
  • Process for delignification of lignocellulose-containing pulp with an organic peracid or salts thereof
    Patent number: 6007678
    Abstract: A process for the delignification and bleaching lignocellulosic-containing pulp, in which the pulp is delignified with an organic peracid or salts thereof, treated with a complexing agent, washed and subsequently bleached with a chlorine-free peroxide containing bleaching.
    Type: Grant
    Filed: February 19, 1998
    Date of Patent: December 28, 1999
    Assignee: Eka Nobel AB
    Inventors: Magnus Linsten, Jiri Basta, Ann-Sofie Hallstrom
  • High di(alkyl fatty ester) quaternary ammonium compound in esteramine from triethanolamine
    Patent number: 6004913
    Abstract: The present invention generally relates to a textile softening composition which comprises, as the softening agent, a quaternary ammonium salt which comprises a mixture of mono-, di-, and tri-ester components, wherein the amount of diester quaternary is greater than about 55% by weight, and the amount of triester quaternary is less than about 25% by weight based on the total amount of quaternary ammonium salt. The invention also relates to a process for preparing said softening agent.
    Type: Grant
    Filed: December 4, 1997
    Date of Patent: December 21, 1999
    Assignee: Akzo Nobel N.V.
    Inventors: Paul Albert Iacobucci, Ralph Franklin, Phuong-Nga Trinh
  • Amination process
    Patent number: 5994585
    Abstract: The present invention relates to an amination process for the manufacture of polyamines. The purpose of the process is to increase the selectivity of linear aminated products and to prevent the formation of discoloring by-products or by-products which may later cause discoloration. According to the process this is achieved by performing, in a first part of the process, the amination to a conversion degree of between 50 and 98% by weight, calculated on the total yield of polyamines, at a proportionally time-weighted average temperature, which is at least 15.degree. C. higher than the proportionally time-weighted average temperature in the remaining part.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: November 30, 1999
    Assignee: Akzo Nobel N.V.
    Inventor: Johan Gunther-Hanssen