Patents Assigned to DSM
  • Process for the production of a porous film having high bursting strength
    Patent number: 5525694
    Abstract: Process for the production of a film having improved bursting strength by applying a recessed line pattern to a porous film produced from a solution of polyethene and from which the solvent has been removed, at a temperature below the melting point of the polyethene, and subsequently stretching the film biaxially with a degree of stretching of at least 2 x in each of the two directions, the surface area of the film increasing by at least a factor 8, and a porous film having high bursting strength.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: June 11, 1996
    Assignee: DSM N..V
    Inventors: Henricus M. Fortuin, Gertrude P. P. Fleischeuer-Nelissen
  • Polyamide thermoplastic elastomer obtained by blending
    Patent number: 5525668
    Abstract: Novel thermoplastic elastomer compositions, made by dispersing a polyolefin elastomer phase containing functionalized EPM or EPDM in a polyamide resin followed by cross-linking of the elastomer phase, are described. The cross-linked phase exists as discreet particles, providing an overall blend which remains thermoplastic. The resulting blend may be used in the fabrication of elastomeric goods without the need for a separate vulcanization step after the desired object is formed.
    Type: Grant
    Filed: December 6, 1994
    Date of Patent: June 11, 1996
    Assignee: DSM Copolymer, Inc.
    Inventor: Errol J. Olivier
  • Continuous process for producing adducted EPM or EPDM oil solution
    Patent number: 5516849
    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: October 6, 1994
    Date of Patent: May 14, 1996
    Assignee: DSM Copolymer, Inc.
    Inventors: Tony L. Caines, Michael L. Junker
  • Imino-azacyclopentanepolyol
    Patent number: 5512204
    Abstract: The invention relates to novel bis-iminoazacyclo pentane polyols according to the formula given below, whereinR.sup.1 =H, alkyl or R.sup.4, whereby R.sup.4 is OH, hydroxyalkyl, hydroxyaryl or hydroxyaralkyl andR.sup.2 and R.sup.3 are independently of one another, OH, hydroxyalkyl, hydroxyaryl or hydroxyaralkyl which are obtainable by reaction of succinonitrile with a hydroxyalkylamine, to polyols obtained on the basis of such compounds, in which a polyether, a polyester or a vinylpolymer or combinations thereof are also incorporated, and to polymers in which said polyols are incorporated. Polyurethane foam in which 1-(hydroxyethyl)-2,5-bis-(2-hydroxyethylimino)-azacyclopentane is incorporated shows a higher mechanical strength and reduced inflammability, whilst the formulation has an increased reactivity.
    Type: Grant
    Filed: January 9, 1995
    Date of Patent: April 30, 1996
    Assignee: DSM N.V.
    Inventors: Veronika M. L. J. Aarts, Dirk A. W. Stanssens, Renier H. M. Kierkels
  • Microporous film and process for the production thereof
    Patent number: 5507993
    Abstract: Microporous film of ultra high molecular weight polyethylene with a high degree of moisture vapor transmission rate and a permeability to air that lies within a narrow range and a process for the production of a film with a high degree of moisture vapor transmission rate and a permeability to air that lies within a narrow range from a polyolefin by extruding a solution of the polyolefine in a first solvent, followed by cooling, the removal of the solvent and stretching of the film, in which the surface of one and only one side of the film is brought into close contact with a second solvent for the polyolefin before the film is contacted with the cooling agent.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: April 16, 1996
    Assignee: DSM N.V.
    Inventors: Henricus M. Fortuin, Joseph A. P. M. Simmelink
  • Microporous film of polyethylene and process for the production thereof
    Patent number: 5503791
    Abstract: Microporous film of polyethylene with a high degree of moisture vapour transmission rate and permeability to air and a process for the production of such a film from a polyolefine by extruding a solution of the polyolefine in a first solvent, followed by cooling, the removal of the solvent and stretching of the film, in which both sides of the film are brought into close contact with a second solvent for the polyolefine before the film is contacted with the cooling agent.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: April 2, 1996
    Assignee: DSM N.V.
    Inventors: Henricus M. Fortuin, Joseph A. P. M. Simmelink
  • Coating system for glass strength retention
    Patent number: 5502145
    Abstract: This invention provides an improved coating composition for glass substrates that comprises a poly(siloxane). The introduction of a poly(siloxane) in a coating composition for a glass substrate, and in particular an optical fiber, acts to delay the rate of deterioration of the glass or optical fiber due to moisture, and improves adhesion between the glass substrate and the coating composition. The introduction of a poly(siloxane) into a polymeric coating composition also improves the interlayer adhesion when more than one coating is applied to a glass substrate. This invention also provides an improved coated glass substrate having a decreased rate of deterioration due to moisture, improved adhesion between the glass substrate and the coating composition and between the various coatings, wherein the coating composition comprises a poly(siloxane).
    Type: Grant
    Filed: March 2, 1994
    Date of Patent: March 26, 1996
    Assignee: DSM Desotech. Inc.
    Inventor: David M. Szum
  • Process and device for the separation of an unsaturated hydrocarbon from a fluid mixture with other hydrocarbons
    Patent number: 5498339
    Abstract: A fluid mixture from which an unsaturated hydrocarbon has to be separated, is passed in the first stage at superatmospheric pressure to one side of a first semiselective gas separation membrane with a non-porous active layer, and a liquid complexing agent is passed along the other side of said first membrane, where said unsaturated hydrocarbon is bound through complexation in the interface of membrane and complexing agent. In the second stage said unsaturated hydrocarbon is dissociated from the complexing agent through temperature increase, the mixture of complexing agent and dissociated unsaturated preferably is passed at superatmospheric pressure to one side of a second semiselective membrane with a non-porous active layer and the unsaturated hydrocarbon migrates to the other side of the membrane and is discharged. Finally, the complexing agent is recycled.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: March 12, 1996
    Assignees: DSM N.V., Nederlandse Organisatie Voor Toegepast Natuurwetenschappelljk Onderzoek Tno
    Inventors: Raimond J. M. Creusen, Everardus C. A. Hendriks, Jan H. Hanemaaijer
  • Process for the production of an assembly conducting article
    Patent number: 5498371
    Abstract: The invention relates to a process for the production of an electrically conducting article, in which process a polymer composition, comprising a carrier polymer, is stretched and, during stretching of the polymer composition, polymerisation of monomers takes place to form a conjugated polymer, characterised in that the polymer composition contains precursor monomers prior to stretching and the monomers are obtained by activating precursor monomers during the stretching step. It has been found that using the process according to the invention articles can be obtained which, in addition to good electrically conducting properties, also have good mechanical properties.
    Type: Grant
    Filed: September 21, 1994
    Date of Patent: March 12, 1996
    Assignee: DSM N.V.
    Inventors: Ronald M. A. M. Schellekens, Hans K. Van Dijk
  • Curable liquid resin composition
    Patent number: 5496870
    Abstract: A curable liquid resin composition comprising a urethane (meth)acrylate polymer obtained by reacting:(A) a polyol compound containing as structural units groups which are represented by formulae--CH.sub.2 CH.sub.2 O-- or--CH.sub.2 CH(CH.sub.2 CH.sub.3)O--;(B) a polyisocyanate compound; and(C) at least one (meth)acrylate compound containing a hydroxyl group and coated articles produced therefrom.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: March 5, 1996
    Assignee: DSM
    Inventors: Chander P. Chawla, Tohru Ohtaka, Shinichirou Iwanaga, Tsuyoshi Watanabe, Katsutoshi Igarashi
  • Process for the preparation of a pentenoate ester
    Patent number: 5495041
    Abstract: A process is described for the preparation of a pentenoate ester by carbonylation of butadiene or butadiene derivate in the presence of carbon monoxide, a alcohol and a catalyst system comprising palladium, an carboxylic acid and a phosphine ligand, wherein the carboxylic acid is pentenoic acid.
    Type: Grant
    Filed: February 22, 1995
    Date of Patent: February 27, 1996
    Assignees: DSM N.W., E. I. Du Pont de Nemours and Company
    Inventors: Otto E. Sielcken, Frank P. W. Agterberg, Nicolaas F. Haasen
  • Palladium catalyst systems for selective hydrogenation of dienes
    Patent number: 5475121
    Abstract: A catalyst precursor is provided that is useful in the selective hydrogenation of olefinic unsaturation in polymers or copolymers. The precursor comprises a palladium salt that is complexed with a complexing agent selected from the group consisting of organic phosphates, dialkylidene acetones, and tetraalkyl ammonium hydroxides. The catalyst precursor may be used in batch, step-wise addition, or continuous systems.
    Type: Grant
    Filed: September 22, 1994
    Date of Patent: December 12, 1995
    Assignee: DSM Copolymer,Inc.
    Inventor: Robert T. Patterson
  • Composition of an ethylene/carbon monoxide copolymer
    Patent number: 5475083
    Abstract: Compositions of an ethylene/carbon monoxide copolymer and a second component serving as swelling agent or gelling or non-gelling solvent, which are suited to be moulded below the melting point of the copolymer using the customary moulding techniques, and the second component of which is chosen from a group so far not known as possible components of compositions of ethylene/carbon monoxide copolymers.
    Type: Grant
    Filed: April 12, 1994
    Date of Patent: December 12, 1995
    Assignee: DSM N.V.
    Inventors: Jacob L. de Haas, Valerie M. C. Reid
  • Process for the preparation of optically active methionine amide
    Patent number: 5468901
    Abstract: The invention relates to a process for preparing optically active methionine amide in high ee purities in which a mixture of D- and L-methionine amide or the Schiff bases thereof is at least partly converted, optionally in the presence of 0.5-4 equivalents of an aldehyde, relative to the amount of methionine amide, and water, in the presence of an organic solvent, using less than 1.2 equivalents of L- or D-mandelic acid, respectively, relative to the amount of D- or L-methionine amide, respectively, or the Schiff bases thereof, present in the mixture of D- and L-methionine amide or the Schiff bases thereof, into a salt of methionine amide and mandelic acid, a portion consisting substantially of one of the diastereoisomers of the salt is separated from the reaction mixture obtained, and the salt is converted into the optically active methionine. A high degree of optical purity is obtained.
    Type: Grant
    Filed: July 9, 1993
    Date of Patent: November 21, 1995
    Assignee: DSM N.V.
    Inventors: Wilhelmus H. J. Boesten, Quirinus B. Broxterman
  • Nylon alloys
    Patent number: 5466761
    Abstract: Alloys of nylon 4.6 having good thermal stability above their melting points and a broad range of desired properties are prepared by melt mixing nylon 4.6 with at least one other nylon and a nylon copolymer. The inclusion of a copolymer in the alloy provides unexpectedly large increases in ductility and toughness.Alloys can be formulated with a unique combination of properties including, for example, elongations of at least 100%, Gardner impact strengths of at least 30 joules, tensile strengths of at least 80 MPa, and heat deflection temperatures of at least 85.degree. C.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: November 14, 1995
    Assignee: DSM N.V.
    Inventors: Howard A. Scheetz, Gerhardus J. A. deVrught
  • Solid phase polymerization of nylon
    Patent number: 5461141
    Abstract: The molecular weight, melt viscosity and melt strength of nylon 4.6 are increased by a solid phase polymerization process conducted under anhydrous conditions at temperatures below the melting point of the nylon. In a preferred embodiment, the nylon used in the process is free of surface air, has a moisture content less than 0.2 wt %, preferably less than 0.02 wt %, and more preferably less than 0.01 wt %. It is also preferred that the extractable impurities are less than 0.2 wt %, preferably less than 0.02 wt %, and more preferably less than 0.01 wt %. The nylon 4.6 product of this anhydrous process is characterized by molecular weights in excess of 50,000, melt viscosities in excess of 600 Pascal.seconds, relative viscosities in excess of 160 and degradation ratios of 7 or less.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: October 24, 1995
    Assignee: DSM N.V.
    Inventor: Howard A. Sheetz
  • Halogen-free radiation curable flame retardant compositions
    Patent number: 5456984
    Abstract: A halogen-free radiation curable flame retardant composition that comprises an end-capped oligomer of a phosphonate polyol and a polyisocyanate and an organic monomer.
    Type: Grant
    Filed: February 6, 1995
    Date of Patent: October 10, 1995
    Assignee: DSM Desotech, Inc.
    Inventors: Timothy E. Bishop, Erwin S. Poklacki
  • Endless objects from epoxy resin or unsaturated polyester and thermoplastic polymer
    Patent number: 5455308
    Abstract: Thermosettable composition suitable for the production of endless objects without the use of continuous carrier material, whereby the composition comprises an epoxy resin or an unsaturated polyester and a high molecular weight thermoplastic polymer which has a weight-average molecular weight of at least 1,000,000 g/mol in an amount to make the composition spinnable, the amount ranging from at least 0.1% where the polymer has a molecular weight of 5,000,000 g/mol or more or less than 2% where the polymer has the weight-average molecular weight of 1,000,000 g/mol, the amount decreasing as the weight-average molecular weight increases.
    Type: Grant
    Filed: August 16, 1994
    Date of Patent: October 3, 1995
    Assignee: DSM N.V.
    Inventor: Cornelis W. M. Bastiaansen
  • Solid sheared polymer blends and process for their preparation
    Patent number: 5451630
    Abstract: A blend and a process for producing that blend in which a high ethylene content ethylene-propylene polymer and a lower ethylene content ethylene-propylene polymer are subjected to simultaneous blending and shearing to reduce their molecular weights and molecular weight distribution and to yield a product that can be recovered as a solid using conventional plastic processing equipment. The sheared blend of polymers can function as a shear stable viscosity index improver with improved lower temperature properties.
    Type: Grant
    Filed: November 9, 1994
    Date of Patent: September 19, 1995
    Assignee: DSM Copolymer, Inc.
    Inventors: Errol J. Olivier, Robert T. Patterson, Peter N. Nugara
  • Solid sheared polymer blends and process for their preparation
    Patent number: 5451636
    Abstract: A blend and a process for producing that blend in which a high ethylene content ethylene-propylene polymer and a lower ethylene content ethylene-propylene polymer are subjected to simultaneous blending and shearing to reduce their molecular weights and molecular weight distribution and to yield a product that can be recovered as a solid using conventional plastic processing equipment. The sheared blend of polymers can function as a shear stable viscosity index improver with improved lower temperature properties.
    Type: Grant
    Filed: November 9, 1994
    Date of Patent: September 19, 1995
    Assignee: DSM Copolymer, Inc.
    Inventors: Errol J. Olivier, Robert T. Patterson, Peter N. Nugara