Abstract: The invention relates to a cellulosic product containing thermoplastic microspheres and a charged aromatic acrylamide-based polymer. The invention further relates to a process for a process for producing a cellulosic product which comprises providing an aqueous suspension containing cellulosic fibers; adding to the suspension thermoplastic microspheres and a charged aromatic acrylamide-based polymer; and dewatering the obtained suspension. The invention also relates to the use of the cellulosic product as a liquid packaging board.
Abstract: The present invention relates to methods of modifying cellulose fibers and of producing paper which methods include providing a pulp suspension of cellulose fibers and adding a cellulose derivative during the bleaching of the cellulose fibers in an acidic bleaching stage.
Type:
Grant
Filed:
September 29, 2005
Date of Patent:
August 30, 2011
Assignee:
Akzo Nobel N.V.
Inventors:
Thomas Christopher Greschik, Jan Nordin, Hans-Ake Baltsen
Abstract: The invention relates to an accelerator solution comprising a complexing agent selected from the group consisting of complexing agents having a nitrogen atom and a hydroxyl group and bipyridine, a salt of a metal selected from the group consisting of transition metal, magnesium, and lithium, and optionally a solvent, wherein when the complexing agent has a nitrogen atom and a hydroxyl group, the amount of complexing agent in the accelerator solution is at least 5 wt %, based on the total weight of the accelerator solution, the amount of solvent is less than 50 wt %, and the amount of diethylene glycol as solvent is less than 25 wt %, based on the total weight of the accelerator solution.
Type:
Grant
Filed:
March 31, 2008
Date of Patent:
August 30, 2011
Assignee:
AKZO Nobel N.V.
Inventors:
Frederik Willem Karel Koers, John Meijer, Anna Gerdine van de Bovenkamp-Bouwman
Abstract: The present invention relates to the use of a solid comprising at least one organosilane and a carrier material to hydrophobise mortars, wherein the organosilane has the formula R1Si(OR?)3 or R1R2Si(OR?)2 wherein R1 and R2 are the same or different and are a linear or branched C1- to C4-alkyl and/or alkenyl group, OR? is an acetoxy, a C1- to C4- alkoxy and/or a C2- to C6-methoxyalkoxy and/or ethoxyalkoxy group, and the carrier material is a solid at room temperature. The amount of cement in the final formulation is zero or less than 5 wt.-%, based on the total weight of the final formulation in the dry and uncured form. Claimed are also a powder comprising the silane and a carrier with the carrier being a water-soluble polymer, dry mortar formulations containing no or less than 5 wt.-% cement, based on the dry weight of the uncured mortar formulation, as well as processes to manufacture the formulations and/or compounds.
Type:
Application
Filed:
November 3, 2009
Publication date:
August 25, 2011
Applicant:
AKZO NOBEL N.V.
Inventors:
Thomas Aberle, Andrei P. Pustovgar, Franck Vallée, Paul Emmenegger, Dominique Schaub
Abstract: The invention relates to thermally expandable thermoplastic microspheres comprising a polymer shell made from ethylenically unsaturated monomers encapsulating a propellant, said ethylenically unsaturated monomers comprising from 40 to 70 wt % of acrylonitrile, from 5 to 40 wt % of methacrylonitrile, from 10 to 50 wt % of monomers selected from the group consisting of esters of acrylic acid, esters of methacrylic acid and mixtures thereof, and said propellant comprising at least one of methane, ethane, propane, isobutane, n-butane and neo-pentane. The invention further relates to the production and use of the microspheres.
Type:
Application
Filed:
May 3, 2011
Publication date:
August 25, 2011
Applicant:
AKZO NOBEL N.V.
Inventors:
Ove Nordin, Heléne Ström, Christina Nyholm, Claes Hammer
Abstract: A process for the production of an aqueous sol containing silica-based particles which comprises (a) acidifying an aqueous silicate solution to a pH of from 1 to 4 to form an acid sol; (b) alkalising the acid sol at an SiO2 content within the range of from 4.5 to 8% by weight; (c) allowing particle growth of the alkalised sol for at least 10 minutes; or heat-treating the alkalised sol at a temperature of a least 30° C.; (d) alkalising the obtained sol to a pH of at least 10.0; and (e) optionally concentrating the sol obtained according to (b), (c) or (d) to provide an aqueous sol containing silica-based particles and having a specific surface area of at least 90 m2/g aqueous sol; as well as an aqueous sol containing silica-based particles obtainable by the process.
Type:
Application
Filed:
April 4, 2011
Publication date:
August 11, 2011
Applicant:
AKZO NOBEL N.V.
Inventors:
Michael Persson, Marek Tokarz, Maj-Lis Dahlgren, Hans Johansson-Vestin
Abstract: The present invention relates to the use of a zwitterionic surfactant in combination with an ether sulphate or ether carboxylate surfactant in a water-based system as a drag-reducing agent. The combination has besides a high drag-reducing effect also a low sensitivity to hard water.
Abstract: The invention relates to an additive for hydraulically setting systems based on modified polycarboxylates and water-soluble ethers of high polymeric polysaccharides, optionally containing further standard additives, characterized by a content of a) a water-soluble ether of cellulose or a cellulose-like compound with a viscosity of at least approximately 1,000 mPas, particularly at least approximately 2,000 mPas, measured as a 2% aqueous solution with a Brookfield viscosimeter at 20° C. and 20 rpm and b) a polycarboxylate, whose main chain is linked by means of ester, ether, imide and/or amide groups with polyethylene oxide-containing side chains. The invention also relates to hydraulic mixtures having a content of the above additive and the use thereof.
Type:
Grant
Filed:
August 28, 2009
Date of Patent:
August 2, 2011
Assignee:
Akzo Nobel N.V.
Inventors:
Hanspeter Waser, Erwin Buhler, Robert Koelliker
Abstract: The invention relates to a process for the production of chlorine dioxide comprising forming chlorine dioxide in a reaction medium in a reaction vessel and withdrawing chlorine dioxide as a gas from the reaction medium in the reaction vessel, the process further comprising adding chlorine dioxide to at least one raw material used in the process. The invention further relates to the use of chlorine dioxide for the reduction of the amount of chlorinated aromatic compounds occurring in a process for the production of chlorine dioxide.
Type:
Application
Filed:
October 2, 2009
Publication date:
July 28, 2011
Applicant:
AKZO NOBEL N.V.
Inventors:
Felix Karl Torsten Hultén, Karolina Ellen Therese Appelqvist Albinsson, Kalle Hans Thomas Pelin
Abstract: The invention relates to an aqueous polymer dispersion comprising an anionic water-soluble dispersion polymer comprising in polymerized form a monomer mixture comprising (i) one or more anionic monomers, (ii) a first non-ionic vinyl monomer which is acrylamide, and (iii) at least one second non-ionic vinyl monomer; a water-soluble salt and a stabilizer, wherein the water soluble salt is present in an amount of at least 2.0% by weight, based on the total weight of the dispersion. The invention further relates to a process for producing the aqueous polymer dispersion, use of the aqueous polymer dispersion as a flocculating agent in papermaking or for water purification, and a process for producing paper which comprises adding one or more drainage and retention aids comprising the aqueous polymer dispersion to an aqueous suspension containing cellulosic fibres and then dewatering the obtained suspension.
Type:
Application
Filed:
August 19, 2009
Publication date:
July 21, 2011
Applicants:
AKZO NOBEL B.V., Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung E.V.
Inventors:
Christian Przybyla, Oliver Struck, André Laschewsky, Bernd-Reiner Paulke
Abstract: The present invention generally relates to a process for the cleaning oil contaminants from solid particulates. The invention also relates to a process and a surfactant composition for cleaning oil contaminated solids, such as cuttings, from oil and gas well drilling operations, and the separation and recovery of the oil from solid particulates.
Abstract: The invention relates to a viscoelastic system for drift reduction for pesticidal formulations, and the use thereof, wherein said formulation comprising at least one nitrogen-based cationic surfactant and at least one pesticide, wherein said pesticide contains at least one acid functional group associating with said cationic surfactant thereby forming a viscoelastic formulation.
Abstract: The present invention relates to a hair fixative film, which contains a natural and/or synthetic polymer as the main component and a method of applying said film to hair. Such film is useful in maintaining a desired look and style of hair. Furthermore, the film is beneficial because it enables the combination of ingredients that are incompatible in other application forms.
Abstract: The present invention pertains to a process for forming a coating on a substrate using a tribo-charging electrostatic fluidized bed process; characterized in that a powder coating is used which has a particle size distribution such that a) d(v,90)?42.5 ?m, and b) i) the percentage of particles <10 ?m in size is ?12% by volume, and/or ii) [d(s,90)÷d(s,10)]2?3.5, [d(s,90)?7]d(s,90) being greater than 7 ?m and d(s,90) and d(s,10) being measured in microns.
Type:
Grant
Filed:
July 11, 2006
Date of Patent:
July 5, 2011
Assignee:
Akzo Nobel Coatings International B.V.
Inventors:
John Ring, Michele Falcone, Robert Edward Barker, Andrew George Cordiner
Abstract: Composition comprising at least one polyolefin, tris-dibromopropyl isocyanurate, and 0.05-2 phr of at least one free radical initiator, said initiator being selected from the group consisting of organic peroxides, C—C initiators, and N—N initiators. This composition makes it possible to obtain very good flame retardancy with much lower amounts of synergist than known compositions. What is more, a synergist is not even required to obtain sufficient flame retardancy.
Type:
Application
Filed:
August 27, 2009
Publication date:
June 30, 2011
Applicant:
AKZO NOBEL N.V.
Inventors:
Andreas Herman Hogt, Geesje Klasina Spijkerman, Haimo Tonnaer
Abstract: A process is disclosed for preparing an organically modified layered double hydroxide having a distance between the individual layers of the layered double hydroxide of about 1.5 nm and comprising an organic anion as charge-balancing anion, the process comprising the steps of: (a) preparing a precursor suspension comprising a divalent metal ion source and a trivalent metal ion source; (b) solvothermally treating the precursor suspension to obtain a double layered hydroxide, wherein an organic anion is added before or during the formation of the layered double hydroxide of step (b), or following the formation of the layered double hydroxide, so as to obtain the organically modified layered double hydroxide, with the proviso that deoxycholic acid is not the sole organic anion.
Type:
Grant
Filed:
December 1, 2006
Date of Patent:
June 28, 2011
Assignee:
Akzo Nobel N.V.
Inventors:
Robin Winters, Elwin Schomaker, Siebe Cornelis De Vos, Marianne Frederika Reedijk, Johanna Henriëtte Zijtveld-Van Der Wiel
Abstract: Aqueous treatment composition for use as anti-scalant and dispersant. The composition includes a polymer containing low amounts of sulfonate that prove as effective in carbonate and phosphate inhibition as polymers containing much higher amounts of sulfonate.
Type:
Grant
Filed:
April 13, 2007
Date of Patent:
June 21, 2011
Assignee:
Akzo Nobel N.V.
Inventors:
Klein A. Rodrigues, Adrian Zuberbuehler, Stuart Holt, Kevin Beairsto
Abstract: The present invention pertains to a process for reducing the bulking sludge in an activated sludge plant for wastewater treatment wherein an iron(ll) or iron(lll) salt and at least one fatty amine or fatty amine derivative are used, and to compositions comprising the iron(ll) or iron(lll) salt and one or more fatty amines and/or fatty amine derivatives.
Type:
Application
Filed:
June 2, 2009
Publication date:
June 16, 2011
Applicant:
AKZO NOBEL N.V.
Inventors:
Roy Geerts, Cornelis Gijsbertus Van Ginkel, Boen Ho O, Marianne Frederika Reedijk, Benno Middelhuis