Patents Assigned to DSM N.V.
  • Process for the preparation of epsilon-caprolactam
    Publication number: 20030065169
    Abstract: A process for the preparation of &egr;-caprolactam starting from 6-aminocaproic acid, 6-aminocaproamide, 6-aminocaproic ester, 6-aminocapronitrile, oligomers or polymers of these compounds or mixtures comprising at least two of these compounds, which process is performed in the presence of N-(5-carboxypentyl)-&egr;-caprolactam and/or derivative thereof in an amount of less than 50 wt. % and more than 0.1 wt. % (based on the total reaction mixture).
    Type: Application
    Filed: August 2, 2002
    Publication date: April 3, 2003
    Applicant: DSM N.V.
    Inventors: Frank P.W. Agterberg, Rudolf P.M. Guit, Matthias R.J. Offermanns
  • Adhesive composition with increased cure rate
    Publication number: 20030065127
    Abstract: Adhesive composition consisting of an aminoplast resin with a free formaldehyde-like compound being present. In particular an adhesive composition consisting of a melamine-urea-formaldehyde resin to which a free formaldehyde-like compound has been added so that F/(NH2)2 is equal to 0.8-1.6. The adhesive is in particular suitable for the preparation of board material by combining in a press cellulose-containing materials with the adhesive according to the invention and in this press manufacturing board material at elevated temperature and pressure.
    Type: Application
    Filed: August 19, 2002
    Publication date: April 3, 2003
    Applicant: DSM N.V.
    Inventors: Adriaan Cornelis Lambertus Van Der Waals, Gerard Evert Oosting, Jozef Maria Johannes Mattheij
  • Process of making curved ceramic moulded part containing internal electrically conductive paths
    Patent number: 6539626
    Abstract: A curved multilayer ceramic moulded part, particularly curved in directions perpendicular to one another, is limited by two virtually parallel surfaces and an edge. Electrically conductive path(s) parallel to the surface are provided internally. The molded part may be produced by deforming a dish-shaped green moulding, formed from a composite of a self-supporting ceramic film having at least one electrically conductive path and at least one additional ceramic film, with or without electrically conductive path(s), to pressure from all sides. The deformed part is subjected to burning out and sintering. The moulded articles are virtually free of defects. Absolute deviation from the average shrinking of less than 2% may be obtained.
    Type: Grant
    Filed: December 5, 2000
    Date of Patent: April 1, 2003
    Assignee: DSM N.V.
    Inventors: Johannes W. H. Kolnaar, Johannes L. M. Op Den Kamp, Jolanda I. M. Colnot, Hans H. H. Hornman
  • Condensation polymer containing dialkylamide endgroups, process for producing said condensation polymers and applications thereof
    Patent number: 6541110
    Abstract: The invention relates to a condensation polymer, as well as to a process for preparation said polymers, having at least one dialkylamide endgroup connected through the polymer backbone to a unit derived from an alkylamide, the connection comprising at least one ester linkage. The polymer according to the invention can be linear or branched. The condensation polymers can be very widely used in technically different fields, both in thermosetting and in thermoplastic applications. The invention also relates to a composition comprising the condensation polymer according to the invention, an active substance and a polymer, as well as to a process for incorporating an active substance in an object comprising at least of a polymer composition, by bringing the object into contact with the active substance. More in particular, the invention relates to the dying of polymer fibres.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: April 1, 2003
    Assignee: DSM N.V.
    Inventors: Rudolfus A. T. M. Van Benthem, Peter E. Froehling
  • Optical fiber coating compositions containing secondary or tertiary amino silicone-containing additive
    Patent number: 6538045
    Abstract: A radiation-curable composition for an ink base, ink composition, outer primary composition, buffering material or matrix material for fiber optics includes, in the uncured state, a secondary amino or tertiary amino silicone-containing additive.
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: March 25, 2003
    Assignee: DSM N.V.
    Inventors: Edward J. Murphy, Edward P. Zahora, Nancy Coster, Glenn Evans
  • Process for the preparation of a heat curable paint binder composition
    Publication number: 20030055182
    Abstract: The invention relates to a process for the preparation of a heat curable paint binder composition containing a compound comprising hydroxyalkylamide groups. At first a compound comprising hydroxyalkyl amide units and carboxylic acid units is obtained by reacting a cyclic anhydride and an alkanolamine in a mixing device and that secondly the binder composition is obtained by mixing the compound and a polymer in a second mixing device.
    Type: Application
    Filed: August 23, 2002
    Publication date: March 20, 2003
    Applicant: DSM N.V.
    Inventors: Willem Grisnich, Rudolfus Antonius Theodorus Maria Van Benthem, Dirk Muscat, Jacobus Adriaan Antonius Vermeulen
  • UV stable polyetherester copolymer composition and film therefrom
    Patent number: 6534585
    Abstract: A polyetherester copolymer composition having improved UV stability includes activated carbon and hindered amine light stabilizer (HALS). A film of the composition having a thickness of 100 &mgr;m increases life by a factor of about 2, relative to the sum of the individual components.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: March 18, 2003
    Assignee: DSM N.V.
    Inventors: Krijn Dijkstra, Pieter Gijsman
  • Radiation-curable, optical fiber primary coating system
    Patent number: 6534557
    Abstract: Optical fiber primary coating systems are disclosed having excellent ribbon stripping and adhesion behavior. The coatings are radiation-curable. The excellent stripping and adhesion behavior can be inner piramry coating composition having a slip enhancing component and a high modulus outer primary coating composition. Combination of means can be employed. Stripping behavior can be measured by crack propagation and fiber friction measurements.
    Type: Grant
    Filed: July 15, 1999
    Date of Patent: March 18, 2003
    Assignee: DSM N.V.
    Inventors: David M. Szum, Chander P. Chawla, James R. Petisce, George Pasternack, Timothy E. Bishop, Paul E. Snowwhite, Edward P. Zahora
  • Radiation curable resin composition
    Patent number: 6528553
    Abstract: The present invention provides a curable composition, comprising: a (meth)acrylate urethane compound derived from a polypropylene glycol or a propyleneoxide ethyleneoxide copolymer glycol having a molecular weight between 1,000 and 13,000 and an amount of unsaturation less than 0.01 meq/g. The liquid curable resin composition of the present invention has improved liquid stability and can produce cured products having superior mechanical characteristics by polymerization. The composition further comprises preferably a primary or secondary amine. The liquid curable resin composition can be used as a coating material for optical fibers, adhesives, and the like. The composition is particularly suitable as a coating material for optical fibers for which long-term stability is required.
    Type: Grant
    Filed: July 20, 2000
    Date of Patent: March 4, 2003
    Assignees: DSM N.V., JSR Corporation
    Inventors: Zen Komiya, Adrianus G. M. Abel, Duurt P. W. Alkema, Masahito Mase, Takashi Ukachi
  • Process for the production of polyamide-6 from epsilon-caprolactam
    Patent number: 6528614
    Abstract: The invention relates to a process for the production of polyamide-6 by polymerization of &egr;-caprolactam with full re-use of extracted caprolactam and oligomers. The extract is not subjected to a pretreatment for reduction of the cyclic dimer content. By carrying out the polymerization in two steps, the first at an elevated pressure, but lower than the vapor pressure of the reaction mixture supplied, and the second at approximately atmospheric or reduced pressure, the cyclic dimer content of the polymerizate leaving the second polymerization step is kept at a constant level. The process offers a high degree of flexibility in terms of production capacity and composition and proportion of recycled lactam in the lactam feed for the polymerization.
    Type: Grant
    Filed: March 23, 2001
    Date of Patent: March 4, 2003
    Assignee: DSM N.V.
    Inventors: Ernst E. G. Kloosterman, Albert A. A. Van Geenen, Cornelis C. L. Van Der Sluijs, Erik E. R. Peerlkamp, Theo T. K. Schulpen, Ronald R. J. H. Hoenen
  • Reactive silica particles, process for manufacturing the same, use of the same
    Patent number: 6528604
    Abstract: Reactive silica particles capable of producing coatings exhibiting excellent scratch resistance, weather resistance, adhesiveness, and curability, while satisfying a wide spectrum of performances from transparency to semi-transparency and providing a glossy surface as well as a frosty surface. Reactive silica particles comprises silica particles and an organic compound chemically bonded to the silica particles via a silyloxy group, wherein the organic compound has a polymerizable unsaturated group, a group represented by the following formula (1), (wherein X is a group selected from —NH—, —O—, and —S— and Y is a group selected from oxygen and sulfur, provided that when X is —O—, Y is a sulfur atom), and a group represented by the following formula (2), (wherein Z is a group selected from oxygen and sulfur).
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: March 4, 2003
    Assignees: DSM N.V., JSR Corporation, Japan Fine Coatings
    Inventors: Yuichi Eriyama, Atsushi Baba, Takashi Ukachi
  • Ballistic vest
    Publication number: 20030037361
    Abstract: The invention relates to a ballistic vest containing a stack of flexible fabrics and a stack of flexible unidirectional layers, in which the fabrics contain strong fibres of a first kind, the unidirectional layers contain strong fibres of a second kind, and in which the fibres in a unidirectional layer run essentially parallel and are disposed at an angle to fibres in an adjacent layer which is greater than 0 degrees, where in that the flexible fabric is a loose fabric and is located on the strike side of the vest.
    Type: Application
    Filed: August 9, 2002
    Publication date: February 27, 2003
    Applicant: DSM N.V.
    Inventors: Peter H.W. Steeghs, Marc Blaauw, Wilhelmus A.R.M. Pessers, Jan L. Lindemulder
  • Radiation-curable metal particles and curable resin compositions comprising these particles
    Patent number: 6521677
    Abstract: Provided is a liquid curable resin composition which can produce transparent cured products with a high refractive index, high hardness, and superior abrasion resistance, and which can be suitably used as a coating material. The liquid curable resin composition comprises: (A) a poly-functional (meth)acrylic compound having at least three (meth) acryloyl groups in the molecule; (B) a reaction product obtained by the reaction of a compound having a polymerizable unsaturated group and alkoxysilyl group in the molecule and particles metal oxide, the metals being preferably selected from the group consisting of zirconium, antimony, zinc, tin, cerium, and titanium; and (C) a radiation polymerization initiator.
    Type: Grant
    Filed: May 7, 2001
    Date of Patent: February 18, 2003
    Assignees: DSM N.V., JSR Corporation, Japan Fine Coating Co., Ltd.
    Inventors: Takao Yashiro, Yuichi Eriyama, Isao Nishikawi, Takashi Ukachi
  • Process for hydrogenation of carbon-carbon double bonds of an unsaturated polymer
    Patent number: 6521694
    Abstract: The invention relates to a process for hydrogenating carbon-carbon double bonds of an unsaturated polymer by adding to the unsaturated polymer (1) a reducing agent selected from the group comprising hydrazines and hydrazine-releasing compounds, (2) an oxidising compound and (3) a catalyst, wherein the catalyst contains an element from group 13 of the Periodic Table of the Elements.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: February 18, 2003
    Assignee: DSM N.V.
    Inventors: Johannes W. Belt, Jacobus A. A. Vermeulen, Mike Köstermann
  • Process to separate linear alkyl 5-formylvalerate
    Patent number: 6521752
    Abstract: The invention relates to a process to separate linear 5-formylvalerate compound from a crude mixture comprising 5-formylvalerate compound and 2-, 3- and/or 4-formylvalerate compound by vacuum distillation, wherein the distillation is performed in the presence of a phenolic compound with a boiling point which is at least 10° C. higher than the boiling point of the 5-formylvalerate at 0.1-100 kPa.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: February 18, 2003
    Assignees: DSM N.V., E.I. Dupont de Nemours and Co.
    Inventors: Onko J. Gelling, Peter C. Borman
  • Process for the fermentative production of deacylated cephalosporins
    Patent number: 6518039
    Abstract: The present invention discloses a process for the production of N-deacylated cephalosporin compounds via the fermentative production of their 7-acylated counterparts.
    Type: Grant
    Filed: May 17, 1999
    Date of Patent: February 11, 2003
    Assignee: DSM N.V.
    Inventors: Maarten Nieboer, Erik De Vroom, Johannis Lugtenburg, Dirk Schipper, Adrianus Wilhelmus Hermanus Vollebregt, Roelof Ary Lans Bovenberg
  • Membrane filtration
    Patent number: 6515115
    Abstract: The invention relates to a process for isolating a desired water-soluble product from a fermentation broth wherein the broth is circulated along a ceramic membrane, and wherein a trans-membrane pressure of at least 1.5 bar is applied, whereupon an aqueous solution containing the desired product traverses the membrane, and is subsequently collected. Advantageously, during this filtration process the temperature of the broth is maintained at 20 to 50° C., preferably at 30 to 45° C. According to the invention, a decreased process time and a higher capacity and efficiency of the filtration are obtained.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: February 4, 2003
    Assignee: DSM N.V.
    Inventors: Gerard Jan Kwant, Pieter Johannes Gerrit De Zwarte
  • Electrolytic membrane, method of manufacturing it and use
    Patent number: 6514561
    Abstract: Electrolytic membrane comprising an ion-conducting polymer which is fixed in the pores of a porous polyalkene membrane stretched in at least one direction, wherein the polyalkene membrane has a porosity of 30-90% and a mean pore diameter of 0.1 to 5.0 &mgr;m. The electrolytic membrane can be manufactured by impregnating the polyalkene with a suitable solution of the ion-conducting polymer at a temperature which is at least 80° C., preferably at least 110° C., and which is not above the melting point of the polyalkene membrane used. The electrolytic membrane is very suitable for use in solid-polymer fuel cells and batteries.
    Type: Grant
    Filed: May 6, 1999
    Date of Patent: February 4, 2003
    Assignee: DSM N.V.
    Inventors: Ronald K. A. M. Mallant, Gijsbertus H. M. Calis, Frank A. de Bruijn
  • Dielectric, radiation-curable coating compositions
    Patent number: 6506814
    Abstract: A UV-curable acrylate-thiol-ene insulating coating composition for electrical conductors, a method of manufacturing a UV-curable acrylate-thiol-ene insulating coating composition for electrical conductors. The insulating coating being of about 2.5 &mgr;m to about 500 &mgr;m thickness, which cured coating has a dielectric dissipation factor (60 Hz, 24° C.) of lower than about 0.05.
    Type: Grant
    Filed: May 7, 1998
    Date of Patent: January 14, 2003
    Assignee: DSM N.V.
    Inventors: Vadim V. Krongauz, Chau T. M. Ha, Sangeeta Rampuria
  • Fluidized bed reactor with asymmetric gas inlet
    Patent number: 6506855
    Abstract: Process for polymerizing one or more olefinic monomers in a fluid-bed reactor which is bounded at the bottom by a gas-distributing plate containing apertures, comprising the supply of a gas to the reactor through the gas-distributing plate and optionally the supply of a liquid to the reactor, in which the average rate at which the gas is supplied to the reactor is higher in a first part of the gas-distributing plate whose area equals half that of the gas-distributing plate than the average rate at which the gas is supplied in a second part covering the area of the gas-distributing plate that lies outside the first part and reactor suitable for this process.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: January 14, 2003
    Assignee: DSM N.V.
    Inventors: Stanislaus M. P. Mutsers, Paul J. Diepen