Patents Assigned to DSM N.V.
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Patent number: 6455740Abstract: Process to separate a group 8-10 metal/phosphite ligand complex from an organic liquid mixture, wherein the following steps are performed (1) contacting the organic liquid with a support having bonded thereto an organophosphine ligand and separating the organic mixture which is poor in group 8-10 metal/phosphite ligand complex, (2) contacting the thus obtained loaded support with an organic solvent and carbon monoxide and separating the thus obtained organic solvent rich in group 8-10 metal/phosphite ligand complex, and (3) reusing the support obtained in step (2) in step (1).Type: GrantFiled: February 8, 2000Date of Patent: September 24, 2002Assignee: DSM N.V.Inventors: Nicolaas L. H. L. Broeders, Onko J. Gelling, Hendrik F. Martens, Klaas Timmer, Harmen A. Meinema
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Patent number: 6455121Abstract: Cationic and hybrid radiation-curable pressure sensitive adhesive compositions for digital versatile discs and other substrates, a method for bonding versatile digital disc layers together with a cationic or hybrid radiation-curable pressure sensitive adhesive, and a digital versatile disc bonded by cationic or hybrid radiation-curable pressure sensitive adhesive.Type: GrantFiled: December 5, 2000Date of Patent: September 24, 2002Assignee: DSM N.V.Inventors: Chau Thi Minh Ha, Michael G. Sullivan
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Patent number: 6452002Abstract: Process for preparing an aqueous mixture of &egr;-caprolactam and 6-aminocaproic acid and/or 6-aminocaproamide which involves, as the reductive amination step, contacting 5-formylvaleric acid and/or an alkyl 5-formylvalerate in water as solvent with hydrogen and an excess of ammonia in the presence of a ruthenium on carrier, as a catalyst, wherein the carrier is titanium oxide, zirconium oxide, graphite or carbon and the catalyst also contains at least one of the metals of group 8-11, or a compound of these metals. The aqueous mixture can be used to prepare &egr;-caprolactam.Type: GrantFiled: March 1, 2001Date of Patent: September 17, 2002Assignees: DSM N.V., E.I. du Pont de Nemours and CompanyInventors: Robert Pestman, Lambertus H. W. M. Van Lieshout
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Publication number: 20020128385Abstract: The invention relates to a flexible polyamide composition containing at least 50 parts by weight of non-cross-linked rubber per 50 parts by weight of polyamide and the production thereof. The polyamide has a molecular weight such that the melt viscosity at the processing temperature is at most 300 pa.s, preferably at most 200 pa.s. The rubber's Mooney viscosity is at least 40, most preferable is a rubber with a Mooney viscosity of at least 60. The rubber has been functionalized. Preferably a combination of a functionalized and a non-functionalized rubber is used. The rubber particles in the polyamide matrix have a particle size of at most 5 &mgr;m, preferably at most 3 &mgr;m.Type: ApplicationFiled: September 26, 2001Publication date: September 12, 2002Applicant: DSM N.V.Inventor: Guido P.C. Beusen
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Patent number: 6448395Abstract: Process for purifying an aqueous caprolactam mixture by extracting the caprolactam with the aid of an organic caprolactam solvent that is not miscible with water in a benzene extraction, and releasing the caprolactam from the organic solvent by means of extraction with water, with the formation of an aqueous caprolactam solution, in a back extraction, with at least a separate pre-extraction taking place before the benzene extraction and/or the back extraction, in which, in a pre-extraction before the benzene extraction, an organic solvent that is not miscible with water is used for the extraction and, in a pre-extraction before back extraction, water is used for the extraction.Type: GrantFiled: September 17, 1999Date of Patent: September 10, 2002Assignee: DSM N.V.Inventors: Antonius J. F. Simons, Louise A Groot Zevert
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Patent number: 6448394Abstract: The invention relates to a process for the preparation of an N-alkyl or N-aryl carbamoyl derivative in which an amine is contacted with a carbonic acid derivative according to the general formula: where fragments X in the form of XH are a lactam, oxime, imide or triazole. In particular the invention relates to the preparation of a blocked isocyanate according to a process in which no isocyanate is used. The invention also relates to the use of the N-alkyl or N-aryl carbamoyl derivative prepared according to the process according to the invention in a coating.Type: GrantFiled: March 23, 2001Date of Patent: September 10, 2002Assignee: DSM N.V.Inventors: Jacobus A. Loontjens, Bartholomeus J. M. Plum
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Publication number: 20020122839Abstract: A solid imaging apparatus and method produces an integral three-dimensional object from a multiplicity of cross sectional portions of the object by selectively exposing successive layers of a liquid photoformable composition to actinic radiation. The apparatus includes a vessel for containing the composition so as to present a free surface, and a movable platform disposed within the vessel below the free surface. Part of the composition is transferred above the free surface by lowering and raising a dispenser at predetermined positions located away from the platform. A doctor blade contacts the composition transferred above the free surface, and then moves over the platform to form a substantially uniform layer of the composition.Type: ApplicationFiled: December 10, 2001Publication date: September 5, 2002Applicant: DSM N.V.Inventors: Brian Gregory Chapman, Christian Henning Clausen, Daniel James Mickish, Eustathios Vassiliou
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Publication number: 20020120049Abstract: The invention relates to an extruded moulded part comprising at least a polycondensate with a melt strength such that the polycondensate is not suitable for extrusion applications per se and a nano-filler, and a process for its production. The major advantage of the extruded moulded part and the process according to the invention is that extruded moulded parts containing polycondensate grades with both high and low viscosities are available. It is for example possible to use polyamides and polyesters that have not been after-condensed in the extruded moulded part according to the invention. Preferably, the extruded moulded part according to the invention contains a polyamide with a relative viscosity of less than 4.3, determined in a 1 % solution of the polyamide in m-cresol at 25° C. The invention also relates to a process for increasing the melt strength of a polycondensate composition that contains at least a polycondensate by adding an amount of nano-filler to the composition.Type: ApplicationFiled: February 20, 2002Publication date: August 29, 2002Applicant: DSM N.V.Inventors: Martin A. Van Es, Paulus A.M. Steeman, Patrick E.L. Voets
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Patent number: 6440708Abstract: A method for the production of clavulanic acid by the fermentation of a clavulanic acid producing microorganism at a controlled level of at least 50 mg/l ammonia has been provided for. Under the application of these reaction conditions surprisingly high production levels of clavulanic acid have been obtained.Type: GrantFiled: September 27, 1999Date of Patent: August 27, 2002Assignee: DSM N.V.Inventors: Gesina Visser-Luirink, Wilhelmus Theodorus Antonius De Laat, Jeroen Martijn Klop
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Patent number: 6440519Abstract: A photocurable resin composition which comprises (A) a urethane (meth)acrylate oligomer obtained by the reaction of (a) at least one polyol compound preferably selected from the group consisting of polyester polyols and polycarbonate polyols, (b) a polyisocyanate compound, and (c) a hydroxyl group-containing (meth)acrylate compound; (B) a (meth)acrylolylphosphate; (C) a multifunctional (meth)acrylate compound; and (D) a photopolymerization initiator and, optionally, (E) an organosilyl-containing mercapto compound. The composition exhibits a fast cure speed, and the cured products obtained from the composition exhibit superior adhesion under high temperature-high humidity conditions and metal corrosion properties.Type: GrantFiled: September 25, 1998Date of Patent: August 27, 2002Assignees: DSM N.V., JSR Corporation, Japan Fine Coatings Co., Ltd.Inventors: Hideaki Takase, Ryoji Furuta, Toshihiko Takahashi, Takashi Ukachi, Yuichi Takehana
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Patent number: 6441125Abstract: The invention relates to a process for the preparation of a copolyether ester built up of hard polyester segments of repeating units derived from at least one alkylene glycol and at least one aromatic dicarboxylic acid or an ester thereof and soft segments derived from at least one polyalkylene oxide glycol, which comprises polymerization by condensation in the melt of at least one aromatic dicarboxylic acid, at least one alkylene glycol and at least one polyalkylene oxide glycol, in the presence of a catalyst based on a combination of titanium and a bivalent metal in a single compound or several compounds, characterized in that the molecular ratio of Ti:bivalent metal is at most 1.6, preferably at most 1.5. The invention leads to a substantial shortening of the polycondensation time in the melt or a higher degree of polymerization of the copolyether ester. The solid-phase post-condensation can also be shortened substantially.Type: GrantFiled: April 23, 2001Date of Patent: August 27, 2002Assignee: DSM N. V.Inventors: Geert I. V. Bonte, Gerard H Werumeus Buning, Krijn Dijkstra, Jean M. M. Warnier
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Patent number: 6441208Abstract: The present invention discloses a microbial polyunsaturated fatty acid(PUFA)-containing oil with a high triglyceride content and a high oxidative stability. In addition, a method is described for the recovery of such oil from a microbial biomass derived from a pasteurized fermentation broth, wherein the microbial biomass is subjected to extrusion to form granular particles, dried and the oil then extracted from the dried granules using an appropriate solvent.Type: GrantFiled: January 19, 2001Date of Patent: August 27, 2002Assignee: DSM N.V.Inventors: Hendrik Louis Bijl, Johannes Hendrik Wolf, Albert Schaap, Johannes Martinus Jacobus Visser
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Patent number: 6441210Abstract: Metal complex containing one or more silsesquioxane ligands, having the formula Zy(MAxBq)b (I), wherein Z is a silsesquioxane according to the formula R7−lSi7O12YD1+l (II), M is a metal from groups 3-6 of the Periodic System of the Elements and the lanthanides, A is a monoanionic ligand bound to the metal, B is a &pgr;-bound ligand, y represents the number of silsesquioxane ligands and is 1-10, b represents the number of metal groups and is 1-20, q is 0,1 or 2, x is the number of substituents A bound to the metal; the value of x depends on the metal used and is equal to the valency of the metal minus 1, 2, 3 or 4, R is a substituent bound to Si, Y is an atom from group 13 or 14 of the Periodic System of the Elements, D is a group, directly bound to Y or Si with one atom from group 15 or 16 of the Periodic System of the Elements and 1 determines the amount of substituents R and atoms D and is equal to 0, 1, 2 or 3.Type: GrantFiled: September 4, 2001Date of Patent: August 27, 2002Assignee: DSM N.V.Inventors: Maurits F. H. Van Tol, Sven K. H. Thiele, Robbert Duchateau, Hendrikus C. L. Abbenhuis, Rutger A. Van Santen
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Patent number: 6441072Abstract: The invention relates to a polyamide composition for the production of electrical and electronic components that are suitable for the conditions of the surface mounting technology. In particular, the composition exhibits a high resistance to blistering during the reflow soldering process. The composition according to the invention comprises (a) a polyamide having a melting point higher than 280° C., (b) a polymer having a melting point lower than 230° C., (c) a halogen-containing compound, (d) optionally a synergist for the flame-retardant properties (e) reinforcing material (f) optionally other additives. A particularly good resistance to blistering is achieved if (f) contains at least a compound with acid imide groups.Type: GrantFiled: September 1, 2000Date of Patent: August 27, 2002Assignee: DSM N.V.Inventors: Hubertus G. J. Havenith, Wilhelmus J. M. Sour, Johannes Tijssen, Robert M. Leeuwendal
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Patent number: 6437016Abstract: The invention relates to a radiation curable compound being a mono or multi valent carboxylic ester of a compound containing a hydroxyalkylamidegroup and a hydroxygroup in which the carboxylic ester is derived from an &agr;,&bgr;-ethylenically unsaturated carboxylic acid. A coating composition comprising this compound has a high rate of polymerisation and shows the desired chemical and mechanical properties.Type: GrantFiled: January 8, 2001Date of Patent: August 20, 2002Assignee: DSM N.V.Inventors: Johan F. G. A. Jansen, Aylvin J. A. A. Dias, Pascal M. H. P. Tijssen
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Patent number: 6438306Abstract: The present invention relates to a coated optical fiber comprising a glass optical fiber with a single protective coating or a combination of an inner and an outer primary coating applied thereon and optionally with a colored coating subsequently applied thereon wherein the inner primary coating or at least a portion of the single coating is prepared from a radiation curable composition which when cured as a capillary film with a 100 W medium pressure mercury lamp has a percentage reacted acrylate unsaturation of at least about 54% after exposure to a dose of about 4.4 mJ/cm2 or wherein the outer primary coating is prepared from a radiation curable composition which when cured as a capillary film with a 100 W medium pressure mercury lamp has a percentage reacted acrylate unsaturation of at least about 56% after exposure to a dose of about 4.4 mJ/cm2. The invention further relates to a radiation curable composition having a high cure speed.Type: GrantFiled: April 7, 2000Date of Patent: August 20, 2002Assignee: DSM N.V.Inventors: Timothy E. Bishop, Paul E. Snowwhite, Tyson Norlin, James J. Schouten, John Southwell, Anthony Toussaint
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Patent number: 6428832Abstract: The present invention relates to a process for the preparation of a polyunsaturated fatty acid (PUFA)-containing food, such as an infant formula, where a composition comprising a PUFA is added at a late stage of the infant formula preparation process in this way, the PUFA's are minimally exposed to conditions during the process that induce degradation of the PUFA's.Type: GrantFiled: March 18, 1997Date of Patent: August 6, 2002Assignee: DSM N.V.Inventors: Anthonius Cornelis Van Den Burg, Jan Willem Groenendaal
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Publication number: 20020103329Abstract: The invention relates to a powder paint binder-composition comprising a polymer that contains endomethylene tetrahydrophthalic acid units and a crosslinker.Type: ApplicationFiled: November 30, 2001Publication date: August 1, 2002Applicant: DSM N.V.Inventors: Fokeltje A. Koldijk, Eimbert G. Belder, Coenraad M. Gehrels, Tosko A. Misev
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Patent number: 6407197Abstract: Aqueous dispersion of a polymer, which polymer has been obtained by subjecting a starting polymer which contains maleic anhydride monomer units and vinyl aromatic monomer units to an imidization reaction, the starting polymer containing 7-50 mole % maleic anhydride monomer units and the imidization reaction having been carried out in such a way that at most 75% of the maleic anhydride monomer units has been imidized.Type: GrantFiled: September 1, 2000Date of Patent: June 18, 2002Assignee: DSM N.V.Inventors: Hendrik J. Van Den Berg, Mathijs H. G. Maassen, Laurentius W. Steenbakkers
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Patent number: 6403730Abstract: Fluidized bed reactor process for the polymerization of one or more olefin monomers, wherein the reactor comprises a reaction zone which is confined at the underside by a gas distribution plate and at the top side by a virtual end surface, in which, under operating conditions, a fluidized bed is maintained between the underside and the top side, which reactor is provided with a gas inlet which terminates in the reactor below the gas distribution in which the reaction zone is divided into two or more compartments by one or more substantially vertical partition walls extending from a point located above the gas distribution plate to a point located below the end surface.Type: GrantFiled: May 18, 2000Date of Patent: June 11, 2002Assignee: DSM N.V.Inventor: Stanislaus M. P. Mutsers