Patents Assigned to Polysar Financial Services S.A.
  • Continuous lactide polymerization
    Patent number: 5136017
    Abstract: Lactide monomers and copolymers may be polymerized by a continuous process using one or more continuous stirred tank reactors. The process offers productivity and product quality advantages over the batch process of polymerization.
    Type: Grant
    Filed: February 22, 1991
    Date of Patent: August 4, 1992
    Assignee: Polysar Financial Services S.A.
    Inventors: Gregory B. Kharas, Israel D. Fridman, Speros P. Nemphos
  • 4-valerolactone copolymers
    Patent number: 5132397
    Abstract: Copolymers of lactic acid, from 0.5 to 20 weight % of 4-valerolactone and from 0 to 20 weight % of a C.sub.6-8 lactone form polymers having a higher intrinsic viscosity than homopolymers of lactic acid per se. The polymers also have an increased heat stability over the homopolymer of lactic acid.
    Type: Grant
    Filed: April 2, 1991
    Date of Patent: July 21, 1992
    Assignee: Polysar Financial Services S.A.
    Inventor: Andrea A. DeGuia
  • Dryer for polymer strands
    Patent number: 5123179
    Abstract: A polymer strand dryer comprising in cooperating arrangement a main vacuum line, a secondary vacuum line having therein a water separation means, and a bifurcated head with suction arms extending from each branch of the bifurcated head permits a faster rate of drying polymer than conventional dryer heads.
    Type: Grant
    Filed: April 2, 1991
    Date of Patent: June 23, 1992
    Assignee: Polysar Financial Services S.A.
    Inventor: George S. VanDelinder
  • Polymer melt distributor
    Patent number: 5118388
    Abstract: A horizontal polymer melt distributor is formed from a prism shaped distributor which cooperates with a horizontal tray positioned below the prism shaped distributor. Polymer melt flows into and expands in the distributor then overflows onto the tray. This design holds the polymer melt in the devolatilizer to reduce the content of monomer, dimers and solvent/diluent in the polymer.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: June 2, 1992
    Assignee: Polysar Financial Services S.A.
    Inventor: Osman T. Aboul-Nasr
  • Polyester-polycarbonate-graft polymer alloy
    Patent number: 5075374
    Abstract: A blend comprising 40 to 90 weight percent of a polycarbonate; 5 to 45 weight percent of a polyterephthalate ester; and 5 to 45 weight percent of a styrene acrylate terpolymer grafted onto a styrene-butadiene di or tri block polymer shows a good balance of properties including a high impact strength.
    Type: Grant
    Filed: November 8, 1989
    Date of Patent: December 24, 1991
    Assignee: Polysar Financial Services S.A.
    Inventor: Morton L. Wallach
  • Distributor for a devolatilizer
    Patent number: 5069750
    Abstract: A distributor for a falling strand devolatilizer which is a closed top upwardly facing projection having one or more inclined faces and being centered on a tray having strand forming holes there through. The distributor holds polymer melt in a devolatilizer for a longer period of time resulting in lower levels of monomer, oligomer, and diluent in the treated polymer.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: December 3, 1991
    Assignee: Polysar Financial Services S.A.
    Inventor: Osman T. Aboul-Nasr
  • Styrenic polyamide alloy
    Patent number: 5032644
    Abstract: Polymer alloys having improved toughness comprise a blend of 20 to 30 weight percent of a polyamide; 15 to 30 weight percent of a rubbery polymer and 60 to 40 weight percent of a vinyl polymer containing 1 to 10 weight percent of a vinyl isocyanate monomer. Preferred isocyanate monomers are m- or p-isopropenyl-alpha, alpha dimethylbenzyl isocyanate.
    Type: Grant
    Filed: June 15, 1990
    Date of Patent: July 16, 1991
    Assignee: Polysar Financial Services S.A.
    Inventors: Harry A. Biletch, Emanuiel Cooper
  • Alkaline polymerization of carboxylated polymers
    Patent number: 5015713
    Abstract: Polymers containing acryloyloxy monomers may be prepared by emulsion polymerization at alkaline pH. This permits the use of unlined mild steel reactors to polymerize functional containing monomers.
    Type: Grant
    Filed: April 26, 1989
    Date of Patent: May 14, 1991
    Assignees: Polysar Financial Services S.A., BASF Aktiengesellschaft
    Inventors: Peter R. J. Blanpain, Hendrikus W. Leenders
  • Transparent polyblends
    Patent number: 4990565
    Abstract: A polyblend of a copolymer of an alkyl (meth)acrylate and a vinyl aromatic grafted on to a low molecular weight conjugated diolefin polymer with a terpolymer of a vinyl aromatic, an alkyl acrylate, and an alkyl methacrylate grafted on to a di- or tri-block polymer of vinyl aromatic monomers and a conjugated diolefins in a weight ratio from 10:90 to 40:60 have good flow rates and impact resistance.
    Type: Grant
    Filed: August 23, 1989
    Date of Patent: February 5, 1991
    Assignee: Polysar Financial Services S.A.
    Inventor: William G. Blasius, Jr.
  • Orthopaedic structures from polymeric materials
    Patent number: 4951656
    Abstract: Orthopaedic structures, and processes for making the same, are provided in which the orthopaedic structure comprises a polymeric material which contains a block copolymer having grafted to it styrene, an alkyl acrylate and optionally methyl methacrylate. The orthopaedic structures are substantially transparent, formable and reformable at temperatures of about 45.degree. to about 65.degree. C. and are essentially rigid at ambient temperatures.
    Type: Grant
    Filed: November 9, 1988
    Date of Patent: August 28, 1990
    Assignee: Polysar Financial Services S.A.
    Inventors: Robert J. Gorka, Ervin R. Dan
  • Nucleating systems
    Patent number: 4948823
    Abstract: Solid anhydrides of carboxylic acids, which anhydrides have a melting temperature of at least 100.degree. C. and a boiling temperature of at least 230.degree. C. at STP are suitable for use in nucleating systems for polyester compositions. Such nucleating systems reduce (i) mold cycle time (ii) mold temperature and (iii) the sensitivity of the composition to water during molding.
    Type: Grant
    Filed: December 1, 1988
    Date of Patent: August 14, 1990
    Assignee: Polysar Financial Services S.A.
    Inventor: Morton L. Wallach
  • Styrenic polycarbonate alloys
    Patent number: 4940752
    Abstract: Blends of polycarbonates and a graft copolymer comprising a copolymer of a vinyl aromatic monomer and one or more C.sub.2-8 alkyl esters of C.sub.3-6 ethylenically unsaturated carboxylic acids and methyl methacrylate grafted on to a styrene butadiene or styrene isoprene block copolymer, have improved toughness and processability. The blends may be prepared using intensive mixing or by solution blending.
    Type: Grant
    Filed: May 8, 1989
    Date of Patent: July 10, 1990
    Assignee: Polysar Financial Services S.A.
    Inventors: Lawrence Y. Lo, Paul R. Boulier
  • Devolatilization
    Patent number: 4934433
    Abstract: The efficiency of falling strand devolatilizers is related to a number of factors incluidng the foaming of the polymer melt and the time the melt in both foam and strand form is held in the devolatilizer. The level of residual material including monomers, dimers, trimers, and diluents, in a polymer melt may be reduced by passing the melt sequentially through a preheater operated at relatively low pressure then through a horizontal melt distributor at the top of a devolatilizer chamber.
    Type: Grant
    Filed: November 15, 1988
    Date of Patent: June 19, 1990
    Assignee: Polysar Financial Services S.A.
    Inventor: Osman T. Aboul-Nasr
  • Rocker frame
    Patent number: 4896475
    Abstract: A rocker frame cooperating with a belt conveyor carrying on one end of said rocker frame a pair of cooperating rollers, one of which is powered, is useful to package thin webs or strips of material in partitioned packages. The frame sweeps out a repeating arcuate path which automatically folds the material back upon itself.
    Type: Grant
    Filed: February 21, 1989
    Date of Patent: January 30, 1990
    Assignee: Polysar Financial Services S.A.
    Inventor: Dennis M. McAvinew
  • Styrenic polycarbonate alloys
    Patent number: 4866125
    Abstract: Blends of polycarbonates and a graft copolymer comprising a copolymer of a vinyl aromatic monomer and one or more C.sub.2-8 alkyl esters of C.sub.3-6 ethylenically unsaturated carboxylic acids and methyl methacrylate grafted on to a styrene butadiene or styrene isoprene block copolymer, have improved toughness and processability. The blends may be prepared using intensive mixing or by solution blending.
    Type: Grant
    Filed: December 19, 1988
    Date of Patent: September 12, 1989
    Assignee: Polysar Financial Services S.A.
    Inventors: Lawrence Y. Lo, Paul R. Boulier
  • Heterogeneous polymers
    Patent number: 4855337
    Abstract: Latices which may be used in paper coating compositions to provide reasonable stiffness and enhanced pick resistance contain heterogeneous particles comprising polymers based on styrene and butadiene and contain in one domain 1 to 20 weight % of an alkenyl nitrile.
    Type: Grant
    Filed: May 23, 1986
    Date of Patent: August 8, 1989
    Assignee: Polysar Financial Services S.A.
    Inventors: Claude Dequatre, Peter R. J. Blanpain, Michel Longuet
  • Method of making a carpet
    Patent number: 4798644
    Abstract: A removable foam backed carpet may be prepared by laminating a non-woven scrim, having a cohesive strength less than the cohesive strength of the foam, to the back of a foam backed carpet. The foam backed carpet is gelled, crushed and vulcanized to produce a resilient backing having a good delamination strength. The carpet is particularly useful when it is cut into tiles. The carpet tile may be easily removed to install wiring of if wear is excessive.
    Type: Grant
    Filed: March 24, 1988
    Date of Patent: January 17, 1989
    Assignee: Polysar Financial Services, S.A.
    Inventors: Richard L. Scott, John J. Martin, Landon Smith
  • High pressure water washing device
    Patent number: 4777972
    Abstract: The present invention provides a novel high pressure water cleaning device. The cleaning device of the present invention provides means to mechanically manipulate a high pressure water nozzle. The invention is particularly suitable for cleaning the drier trays of tunnel driers which are used in rubber manufacturing processes.
    Type: Grant
    Filed: June 12, 1987
    Date of Patent: October 18, 1988
    Assignee: Polysar Financial Services S.A.
    Inventor: Michel Adam
  • Transparent impact polymers
    Patent number: 4772667
    Abstract: A thermoplastic polymer comprising a styrenic monomer, an acrylate, a methacrylate and a block copolymer is provided which possesses an unexpected excellent balance of properties including good physical properties, good elongation and a high degree of transparency. Also provided are processes for the preparation of the thermoplastic polymer.
    Type: Grant
    Filed: April 20, 1987
    Date of Patent: September 20, 1988
    Assignee: Polysar Financial Services S.A.
    Inventors: Harry A. Biletch, Richard A. Di Manno, Robert J. Gorka
  • High solids PSA Compounds
    Patent number: 4767813
    Abstract: High solids aqueous based pressure sensitive adhesives may be prepared by directly emulsifying the tackifier resin into a polymeric latex provided the tackifier is heated, plasticized and emulsified and mixed with the latex on a high shear mixer. This gives an adhesive which is faster drying and gives comparable properties to lower solids adhesives.
    Type: Grant
    Filed: March 23, 1987
    Date of Patent: August 30, 1988
    Assignee: Polysar Financial Services S.A.
    Inventor: William T. Evitt