Patents Assigned to DSM
  • Polyamide-imide
    Patent number: 5587452
    Abstract: The invention relates to a polyamide-imide containing recurring units according to the formula ##STR1## where Y is an arylene group, andR and R' are alkylene groups, in which at least 50 mole % of R and/or R' is a butylene group.The polyamide-imides are semi-crystalline.They are suitable for injection moulding applications, structural moulded parts, films, coatings and fibres. They can preferably be used in fields of application where temperatures above 200.degree. C. occur.
    Type: Grant
    Filed: July 3, 1995
    Date of Patent: December 24, 1996
    Assignee: DSM N.V.
    Inventors: Cornelis E. Koning, Lilian M. J. Teuwen
  • Method for the preparation of an aldehyde
    Patent number: 5585524
    Abstract: Method for the preparation of an aldehyde in a process in which cobalt is being recycled by:(a) hydroformylating of an ethylenically unsaturated compound with carbon monoxide and hydrogen at a pressure higher than 5 MPa and a temperature higher than 80.degree. C. in the presence of a cobalt carbonyl compound in an organic phase, following which(b) removing cobalt from the organic phase by contacting the organic phase with a polar mixture, which mixture is substantially immiscible with the organic phase, first the pressure being reduced to a pressure lower than 5 MPa and simultaneously or afterwards cooling being applied down to a temperature below 80.degree. C.
    Type: Grant
    Filed: June 23, 1995
    Date of Patent: December 17, 1996
    Assignee: DSM N.V.
    Inventors: Otto E. Sielcken, Nicolaas F. Haasen
  • Use of a binder composition for the preparation of a powder coating for use as a top coat in the automotive industry and top-coated automotive substrates
    Patent number: 5580660
    Abstract: The invention relates to a binder composition for powder coatings for use as a topcoat in the automotive industry. The invention also relates to top-coated automotive substrates. The binder composition includes a polyester containing hydroxyl groups and a polyacrylate containing hydroxyl groups and a blocked hexamethylenediisocyanate trimer. The polyester has a hydroxyl number of between 20 and 100 mg KOH/g resin and an acid number of less than 10 mg KOH/g resin and the polyacrylate has a hydroxyl number of between 40 and 150 mg KOH/g resin and an acid number of less than 20 mg KOH/g resin. The trimer is blocked with 1,2,4-triazole.
    Type: Grant
    Filed: February 21, 1995
    Date of Patent: December 3, 1996
    Assignee: DSM N.V.
    Inventors: Franciscus M. Witte, Gerrit Kieft, Wilhelmus H. H. A. Van Den Elshout
  • Process for preparing cyanuric acid by seperation from an isocyanic acid/ammonia gas mixture
    Patent number: 5578723
    Abstract: A process for preparing cyanuric acid by cooling an isocyanuric acid/ammonia gas mixture having a temperature of 300.degree. to 480.degree. C. to 200.degree.-300.degree. C., whereupon cyanuric acid is separated off and isolated at this temperature in an apparatus suitable for separating solids from gases, and unreacted isocyanuric acid/ammonia gas mixture is recycled or further processed.
    Type: Grant
    Filed: July 21, 1995
    Date of Patent: November 26, 1996
    Assignee: DSM Chemie Linz GmbH
    Inventors: Erich Schulz, Georg H aubl, Martin M ullner
  • Process for the preparation of an aminoitrile by partial hydrogenation of a nitrile compound with two or more nitrile groups
    Patent number: 5574181
    Abstract: The invention relates to a process for the preparation of an aminonitrile by partially hydrogenating a nitrile compound with two or more nitrile groups in the presence of a catalyst which contains a metal from group 8 of the periodic system of the elements, the hydrogenation being carried out under water-free reaction conditions and the catalyst having been treated with an alkanolate. Preferably, the catalyst is a Raney nickel or Raney cobalt catalyst which has been pretreated with an alkali metal alkanolate or an earth alkali metal alkanolate such as sodium or potassium methanolate.
    Type: Grant
    Filed: August 17, 1994
    Date of Patent: November 12, 1996
    Assignee: DSM N.V.
    Inventors: Hubertus J. M. Bosman, Franciscus H. A. M. J. Vandenbooren
  • Olefin polymers containing bound antioxidant
    Patent number: 5574118
    Abstract: This invention is addressed to olefin polymers having antioxidant properties which are prepared by Ziegler polymerization of one or more monomers containing ethylenic unsaturation along with a polymerizable antioxidant monomer in the form of a substituted norbornene in which at least one substituent contains one or more groups imparting to the molecule antioxidant properties.
    Type: Grant
    Filed: March 6, 1995
    Date of Patent: November 12, 1996
    Assignee: DSM Copolymer, Inc.
    Inventor: Errol J. Olivier
  • Process for preparing a lactam
    Patent number: 5571913
    Abstract: The invention relates to a process for preparing a lactam from an alicyclic ketoxime in the presence of a lactim-O-sulphonic acid and a solvent, the reaction being carried out in the presence of an acid cation exchanger. The invention relates in particular to a process in which the alicyclic ketoxime is represented by the following general formula: ##STR1## where R is a linear or branched alkylidene group containing from 3 to 20 carbon atoms.
    Type: Grant
    Filed: August 19, 1994
    Date of Patent: November 5, 1996
    Assignee: DSM N.V.
    Inventor: Petrus J. H. Thomissen
  • Non-woven layer consisting substantially of short polyolefin fibers
    Patent number: 5569528
    Abstract: The invention relates to a non-woven layer that consists substantially of short polyolefin fibers the nonwoven layer being a felt with in the plane of the layer substantially randomly oriented fibers with a length of 40-100 mm, a tensile strength of at least 1.2 GPa and a modulus of at least 40 GPa. The invention also relates to a method for the manufacture of this felt and to layered structures in which the felt is used. Layered structures comprising a non-woven layer according to the invention have improved specific energy absorption on impact of ballistic projectiles.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: October 29, 1996
    Assignee: DSM N.V.
    Inventors: Leonardus L.H. Van der Loo, Rene C. Van der Burg
  • Multifunctional copolymer and lubricating oil composition
    Patent number: 5563118
    Abstract: An additive composition comprising a graft and derivatized copolymer prepared from ethylene and at least one (C.sub.3 -C.sub.10) alpha- monoolefin and, optionally, a polyene selected from non-conjugated dienes and trienes comprising from about 15 to 80 mole percent of ethylene, from about 20 to 85 mole percent of said (C.sub.3 -C.sub.10) alpha- monoolefin and from about 0 to 15 mole percent of said polyene having an average molecular weight ranging from about 5,000 to 500,000, which has been reacted with at least one olefinic carboxylic acid acylating agent to form one or more acylating reaction intermediates characterized by having a carboxylic acid acylating function within their structure and reacting said reaction intermediate with an amino-aromatic compound to form said graft derivatized copolymer, and a lubricating oil composition containing same are provided.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: October 8, 1996
    Assignee: DSM Copolymer, Inc.
    Inventors: Munmaya K. Mishra, Isaac D. Rubin
  • Process for the preparation of 2-amino-4,6-dichloro-pyrimidine
    Patent number: 5563270
    Abstract: Process for the preparation of 2-amino-4,6-dichloropyrimidine by reaction of 2-amino-4,6-dihydroxypyrimidine with an excess of phosphorus oxychloride at 20 to 80.degree. C. and in the presence of triethylamine as the acid-trapping agent.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: October 8, 1996
    Assignee: DSM Chemie Linz GmbH
    Inventors: Franz-Thomas Schwarz, Johann Altreiter
  • Process for manufacturing friable rubber bales
    Patent number: 5559178
    Abstract: A composition for coating wet rubber particles during extrusion and pelletization prior to drying comprising an inorganic partitioning agent, a thickener and binder reagent, water and a water soluble anionic dispersant, and the process for application to elastomers including those of low viscosity or high resin content to improve their processability during manufacture.
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: September 24, 1996
    Assignee: DSM Copolymer, Inc.
    Inventor: Lincoln Widmer
  • Continuous process for producing adducted EPM or EPDM oil solution
    Patent number: 5556923
    Abstract: The present invention provides a continuous process for producing an adducted derivatized EPM or EPDM oil solution, in which a grafted ethylene polymer is adducted with an antioxidant diamine for formation of an adduct during holding.
    Type: Grant
    Filed: August 22, 1995
    Date of Patent: September 17, 1996
    Assignee: DSM Copolymer, Inc.
    Inventors: Tony L. Caines, Michael L. Junker
  • Reclaiming .epsilon.-caprolactam from carpet waste
    Patent number: 5556890
    Abstract: The present invention is for a method of preparing purified .epsilon.-caprolactam from carpet waste containing nylon-6. Contaminated .epsilon.-caprolactam is obtained by depolymerizing nylon-6 from carpet waste. A mixture of the contaminated .epsilon.-caprolactam and water is then hydrogenated in the presence of hydrogen and a hydrogenation catalyst in order to produce purified .epsilon.-caprolactam. The amount of contaminated .epsilon.-caprolactam in the mixture can be between 10 and 95% by weight.
    Type: Grant
    Filed: June 2, 1994
    Date of Patent: September 17, 1996
    Assignee: DSM N.V.
    Inventors: Antoon H. T. Halderit, Martin Booij, Jan A. J. Hendrix, Yvonne H. Frentzen
  • Process for the dimerization of a conjugated diene
    Patent number: 5545789
    Abstract: The invention relates to a process for the dimerization of a conjugated diene using an iron triad metal nitrosyl halide, in combination with a reducing agent, as catalyst. The process is characterized in that the dimerization is carried out in the presence of nitrogen monoxide (NO). The invention is of interest in particular for the dimerization of butadiene to 4-vinyl cyclohexene.
    Type: Grant
    Filed: May 5, 1995
    Date of Patent: August 13, 1996
    Assignee: DSM N.V.
    Inventors: Henricus A. M. Duisters, Johan G.D. Haenen
  • Process for the purification of a water-.epsilon.-caprolactam mixture
    Patent number: 5539106
    Abstract: A process is described for the purification of .epsilon.-caprolactam which involves hydrogenation of a water-.epsilon.-caprolactam mixture in the presence of a heterogeneous hydrogenation catalyst, wherein the .epsilon.-caprolactam-water mixture is contacted with gaseous hydrogen, upon which hydrogen dissolves in the .epsilon.-caprolactam-water mixture, and subsequently, this hydrogen-containing mixture is contacted with the hydrogenation catalyst. About 90-100% of the hydrogen is dissolved in the water-.epsilon.-caprolactam mixture.
    Type: Grant
    Filed: July 19, 1994
    Date of Patent: July 23, 1996
    Assignee: DSM N.V.
    Inventors: Marcellinus P. G. Thijert, Theodorus A. van der Knaap, Johannes F. Haverkort
  • Preparation of pentenoic acid
    Patent number: 5536873
    Abstract: 3-pentenoic acid or the R ester of pentenoic acid is produced by treating pentenoyl chloride in a reactive distillation zone with ROH where R is hydrogen or hydrocarbon of 1 to 6 carbon atoms. Butadiene may be reacted with HCl that is formed by the hydrolysis of pentenoyl chloride, and the butadiene converted to chlorobutene, and the chlorobutene reacted with carbon monoxide to form pentenoyl chloride.
    Type: Grant
    Filed: December 9, 1994
    Date of Patent: July 16, 1996
    Assignees: E. I. du Pont de Nemours and Company, DSM N.V.
    Inventors: Bruce Murphree, Ronnie Ozer
  • Process for making a polymeric lubricant additive designed to enhance anti-wear, anti-oxidancy, and dispersancy thereof
    Patent number: 5534171
    Abstract: A polymeric lubricant additive that behaves as a viscosity index improver and imparts enhanced anti-oxidancy, dispersancy, and anti-wear properties to said lubricant oil has been prepared. The polymeric substrate is a random co- or terpolymer of ethylene propylene and a third monomer; or a block terpolymer of styrene--ethylenebutylene--styrene where hydrogenation has removed aliphatic unsaturation.Ethylenically unsaturated carboxylic acid or acid anhydride is grafted to these aforementioned substrates and imidized with amino-thiadiazole of the formula: ##STR1## wherein R.sub.1 is H.sub.2 or a (C.sub.1 -C.sub.10) alkyl radical selected from the group consisting of a alkyl, alkenyl, alkoxyl, aralkyl, alkaryl, hydroxyalkyl and aminoalkyl, to produce said polymeric lubricant additive.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: July 9, 1996
    Assignee: DSM Copolymer Inc.
    Inventors: Thomas F. Derosa, Nicholas Benfaremo, Maria M. Kapuscinski, Benjamin J. Kaufman, Rosemary J. Jennejahn
  • Process for the preparation of a polymer
    Patent number: 5532328
    Abstract: The invention relates to a process for the preparation of a polymer from heterocyclic monomer units. The process according to the invention is characterized in that polymerization takes place in the presence of a sulphur-containing reagent.It has been found that the process according to the invention can be used to prepare polymers that can readily be processed, either in solution or in the melt. It has further been found that the reaction time of the reaction that takes place is short, while also the efficiency of the reaction is good. In the process according to the invention use can be made of monomer units that are thermostable. Such monomer units are easy to synthesize and easy to keep.
    Type: Grant
    Filed: December 15, 1994
    Date of Patent: July 2, 1996
    Assignee: DSM N.V.
    Inventors: Ivan A. L. Hoogmartens, Joannes M. J. V. Gelan, Dirk J. M. Vanderzande, Peter E. Froehling
  • Dendritic macromolecule and the preparation thereof
    Patent number: 5530092
    Abstract: The invention relates to a dendritic macromolecule comprising a core and branches emanating from the core wherein the branches are based on vinyl cyanide and/or fumaryl dinatrile units. The invention also relates to processes for preparing these dendritic macromolecules. The dendritic macromolecules according to the invention are not sensitive to degradation through hydrolysis reactions and are also very stable at a high temperature. The processes are very suitable for large scale production of the dendritic macromolecules without requiring purification of reaction intermediates.
    Type: Grant
    Filed: March 10, 1994
    Date of Patent: June 25, 1996
    Assignee: DSM N.V.
    Inventors: Egbert W. Meijer, Hubertus J. M. Bosman, Franciscus H. A. M. J. Vandenbooren, Ellen M. M. De Brabander-van den Berg, Anna M. C. F. Castelijns, Hendrikus C. J. De Man, Rafael W. E. G. Reintjens, Christiaan J. C. Stoelwinder, Atze J. Nijenhuis
  • Process for the preparation of 5-formylvalerate
    Patent number: 5527950
    Abstract: The invention relates to a process for the preparation of a 5-formylvalerate ester by hydroformylating a mixture of pentenoate esters in the presence of a catalyst system which catalyst system comprises a metal from group 8-10 of the Periodic Table of Elements and a mono- or multidentate organic phosphorous ligand, wherein the mixture of pentenoate esters contains less than 500 ppm hydroperoxide compounds.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: June 18, 1996
    Assignees: DSM N.V., E.I. Du Pont de Nemours & Co.
    Inventors: Carolina B. Hansen, Antonius J. J. M. Teunissen