Patents by Inventor Alfred Pischtschan

Alfred Pischtschan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6228938
    Abstract: Thermoplastic materials containing A) 5 to 80 parts by weight of a thermoplastic co- or terpolymer made from the monomers styrene, &agr;-methylstyrene, methyl methacrylate, acrylonitrile with an average molecular weight ({overscore (M)}w) of 70,000 to 119,000, B) 1 to 30 parts by weight of a thermoplastic copolymer made from 60 to 95% by weight of styrene and/or &agr;-methylstyrene and 40 to 5% by weight of acrylonitrile with an average molecular weight ({overscore (M)}w) of 25,000 to 49,500, C) 0.1 to 10 parts by weight of a thermoplastic co- or terpolymer made from the monomers styrene, &agr;-methylstyrene, methyl methacrylate, acrylonitrile with an average molecular weight ({overscore (M)}w) of 1,500 to 6,000 and D) 0.5 to 50 parts by weight of a particulate rafted rubber with a glass transition temperature ≦10° C. and an average particle diameter (d50) of 0.05 to 0.
    Type: Grant
    Filed: June 20, 1994
    Date of Patent: May 8, 2001
    Assignee: Bayer AG
    Inventors: Herbert Eichenauer, Karl-Heinz Ott, Dieter Wittmann, Alfred Pischtschan
  • Patent number: 6211269
    Abstract: Glass-fiber-reinforced ABS molding compounds containing up to 5% by weight of a tin-containing organic compound corresponding to formula (I) and/or (II) in which R1 and R2=C1-12 alkyl, R3, R4=C1-18 alkyl, R5=—(CH2)—n, —CH═CH—, —CH═CR1—, X=H, 1 equivalent of an alkali metal, preferably Na or K, ½ equivalent of an alkaline earth metal, preferably Mg or Ca, n=2-8.
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: April 3, 2001
    Assignee: Bayer AG
    Inventors: Alfred Pischtschan, Herbert Eichenauer, Horst Peters
  • Patent number: 5658985
    Abstract: Thermoplastic molding composition, containing: A) 5-95 weight percent of a thermoplastic homo-, co-, or terpolymer of styrene, alpha-methylstyrene, ring-substituted styrene, methyl methacrylate, acrylonitrile, methacrylonitrile, maleic anhydride, N-substituted maleimide, vinyl acetate or mixtures thereof; B) 5-95 weight % of a graft polymer of B.1) 5-90 parts by weight of styrene, alpha-methylstyrene, ring-substituted styrene, methyl methacrylate, acrylonitrile, methacrylonitrile, maleic anhydride, N-substituted maleimide, vinyl acetate or mixtures thereof on B.2) 95-10 parts by weight of a rubber with a glass transition temperature .ltoreq. 10.degree. C; and C) 0.1-10 parts bye weight per 100 parts by weight of A+B of one or more EPM and/or EPDM rubbers.
    Type: Grant
    Filed: February 16, 1996
    Date of Patent: August 19, 1997
    Assignee: Bayer AG
    Inventors: Herbert Eichenauer, Alfred Pischtschan, Karl-Heinz Ott
  • Patent number: 5457018
    Abstract: A shaped article, in particular a support for image information layers prepared from a biaxially stretched film prepared from a polymer blend of 50 to 97 wt.% of a linear polyester and 3 to 50 wt.% of a polymer containing styrene, wherein the percentages relate to the sum of polyester and polymer containing styrene, is characterised by particularly-elevated covering power.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: October 10, 1995
    Assignee: Agfa Gevaert AG
    Inventors: Klaus Sommer, Leo Morbitzer, Louis Bollens, Marc Stevens, Rudiger Plaetschke, Alfred Pischtschan
  • Patent number: 5420181
    Abstract: Thermoplastic molding compositions containingA) ABS-type resin,B) aromatic polycarbonate resins,C) a compound bearing several carboxyl groups or mixtures thereof and optionallyD) further polymer resins,characterized in that an ABS resin with at least one basically acting additive is used as component A, component C is selected from compounds having a molecular weight of from 150 to 260 having at least two carboxyl groups (--COOH) in the molecule, and the weight ratio of basically acting additive in A: carboxyl groups in C is from 5:1 to 1:1.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: May 30, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Karl-Heinz Ott, Alfred Pischtschan, Edgar Leitz, Karl-Erwin Piejko
  • Patent number: 5314990
    Abstract: A process for the continuous processing of vinyl polymer latices to produce thermoplastically processible vinyl polymer powder by coagulating a stream of a vinyl polymer latex by the addition of a stream of a coagulant with intensive mixing and shearing in a cascade of vessels at an average residence time per vessel of 10 to 60 minutes and at temperatures from 50 to 120.degree. C., volatile auxiliary substances and residual monomers in the polymer being optionally removed by steam distillation and part of the serum separated from the vinyl polymer being added to the stream of coagulant.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: May 24, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ulrich Jansen, Karl-Heinz Ott, Wolfgang Herrig, Otto Koch, Alfred Pischtschan, Dieter Wittmann
  • Patent number: 5302664
    Abstract: Thermoplastic molding compounds comprising three resin components with different molecular weights and two graft rubbers. The thermoplastic molding compounds have good toughness, high heat resistance, adjustable surface gloss and good thermoplastic processability. The invention also relates to a process for the production of the molding compounds.
    Type: Grant
    Filed: June 8, 1993
    Date of Patent: April 12, 1994
    Assignee: Bayer AG
    Inventors: Herbert Eichenauer, Karl-Heinz Ott, Alfred Pischtschan
  • Patent number: 5302663
    Abstract: Thermoplastic molding compounds comprising three resin components with different molecular weights and two graft rubbers. The thermoplastic molding compounds have high toughness, adequate heat resistance, adjustable surface gloss and excellent thermoplastic processability. The invention also relates to a process for the production of the molding compounds.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: April 12, 1994
    Assignee: Bayer AG
    Inventors: Herbert Eichenauer, Karl-Heinz Ott, Alfred Pischtschan
  • Patent number: 5274032
    Abstract: Moulding compositions comprisingA) from 5 to 95% by weight of a graft product of a mixture of from 50 to 100 parts by weight of styrene, .alpha.-methylstyrene, vinyl toluene, methyl methacrylate or mixtures thereof and from 0 to 50 parts by weight of acrylonitrile on a particulate silicone rubber having an average particle diameter (d.sub.50) of from 0.10 to 0.50 .mu.m with a total rubber content of from 30 to 90% by weight andB) from 95 to 5% by weight of a graft product of a mixture of from 50 to 100 parts by weight of styrene, .alpha.-methylstyrene, vinyl toluene, methyl methacrylate or mixtures thereof and from 0 to 50 parts by weight of acrylonitrile on a particulate EPDM rubber having an average particle diameter (d.sub.50) of from 0.20 to 1.00 .mu.m with a total rubber content of from 10 to 50% by weight.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: December 28, 1993
    Assignee: Bayer AG
    Inventors: Herbert Eichenauer, Alfred Pischtschan, Christian Lindner
  • Patent number: 5274031
    Abstract: Molding compounds ofA) 5 to 95 parts by weight of a graft product of resin-forming monomers on a particulate silicone rubber having a total rubber content of from 30 to 90% by weight andB) 95 to 5 parts by weight of resin-forming monomers on a particulate EPDM rubber having a total rubber content of 10 to 50% by weight andC) 10 to 200 parts by weight (based on 100 parts by weight A+B) of a graft product of resin-forming monomers on a particulate acrylate rubber having a total rubber content of from 30 to 80% by weight.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: December 28, 1993
    Assignee: Bauer AG
    Inventors: Herbert Eichenauer, Alfred Pischtschan, Christian Lindner
  • Patent number: 5272205
    Abstract: Molding compounds of(A) 5 to 95% by weight of a graft product of a mixture of 50 to 100 parts by weight styrene, .alpha.-methyl styrene, vinyl toluene, methyl methacrylate or mixtures thereof and 0 to 50 parts by weight acrylonitrile on a particulate silicone rubber with a mean particle diameter (d.sub.50) of from 0.10 to 0.50 .mu.m having a total rubber content of from 30 to 90% by weight and(B) 95 to 5% by weight of a graft product of a mixture of 50 to 100 parts by weight styrene, .alpha.-methyl styrene, vinyl toluene, methyl methacrylate or mixtures thereof and 0 to 50 parts by weight acrylonitrile on a particulate acrylate rubber with a mean particle diameter (d.sub.50) of from 0.05 to 1.00 .mu.m having a total rubber content of 30 to 80% by weight.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: December 21, 1993
    Assignee: Bayer
    Inventors: Herbert Eichenauer, Alfred Pischtschan, Christian Lindner
  • Patent number: 5210135
    Abstract: Thermoplastic molding compounds, containingA) 5-95 weight % of a thermoplastic homo-, co- or terpolymer of styrene, alpha-methylstyrene, ring-substituted styrene, methyl methacrylate, acrylonitrile, methacrylonitrile, maleic anhydride, N-substituted maleimide, vinyl acetate or mixtures thereof,B) 5-95 weight % of a graft polymer ofB.1) 5-90 parts by weight of styrene, alpha-methylstyrene, ring-substituted styrene, methyl methacrylate, acrylonitrile, methacrylonitrile, maleic anhydride, N-substituted maleimide, vinyl acetate or mixtures thereof onB.2) 95-10 parts by weight of a rubber with a glass transition temperature .ltoreq.10.degree. C. andC) 0.1-5 parts by weight per 100 parts by weight A+B of a grafted product of resin-forming monomers on an ethylene-propylene-diene terpolymer rubber with a rubber content of 20-60 weight %.
    Type: Grant
    Filed: August 26, 1992
    Date of Patent: May 11, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Alfred Pischtschan, Karl-Heinz Ott
  • Patent number: 5102939
    Abstract: Stabilizing, synergistically acting mixtures of phenolic antioxidants and sulphur-containing elastic-thermoplastic graft products having terminal thioalkyl groups.
    Type: Grant
    Filed: October 10, 1990
    Date of Patent: April 7, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Alfred Pischtschan, Karl-Heinz Ott
  • Patent number: 5100945
    Abstract: Reaction products of 1 mol of a cycloaliphatic diol corresponding to formula IHO--R--OH Iwith 2 mols cycloaliphatic carboxylic anhydrides corresponding to formulae II and/or III ##STR1## in which R is a cycloaliphatic hydrocarbon radical having 6 to 20 carbon atoms onto which the hydroxy groups are bonded directly or via methylene groups and X represents ##STR2## chemical bond --obtainable obtainable by fusion of the cycloaliphatic diol and the cycloaliphatic carboxylic anhydride in an inert gas atmosphere at temperatures of from 100.degree. C. to 250.degree. C., and the alkali and ammonium salts of these reaction products, and their use as emulsifiers.
    Type: Grant
    Filed: April 2, 1991
    Date of Patent: March 31, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Adolf Schmidt, Herbert Eichenauer, Karl-Heinz Ott, Alfred Pischtschan
  • Patent number: 5071946
    Abstract: Reaction products of 1 mol of a cycloaliphatic diol corresponding to formula IHO--R--OH Iwith 2 mols cycloaliphatic carboxylic anhydrides corresponding to formulae II and/or III ##STR1## in which R is a cycloaliphatic hydrocarbon radical having 6 to 20 carbon atoms onto which the hydroxy groups are bonded directly or via methylene groups andX represents ##STR2## chemical bond obtainable by fusion of the cycloaliphatic diol and the cycloaliphatic carboxylic anhydride in an inert gas atmosphere at temperatures of from 100.degree. C. to 250.degree. C., and the alkali and ammonium salts of these reaction products, and their use as emulsifiers.
    Type: Grant
    Filed: April 16, 1990
    Date of Patent: December 10, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Adolf Schmidt, Herbert Eichenauer, Karl-Heinz Ott, Alfred Pischtschan
  • Patent number: 5064899
    Abstract: Thermoplastic moulding compounds composed of99.8-95% by weight of A) 0-100% by weight of a graft polymer B) 100-0% by weight of a thermoplastic polymer of vinyl monomers and0.2 to 5% by weight of a polyalkylene ether which has been grafted with a polymer of C.sub.1 -C.sub.6 alkyl acrylates, cycloalkyl acrylates or methacrylates and optionally styrene or .alpha.-methyl styrene.
    Type: Grant
    Filed: March 22, 1990
    Date of Patent: November 12, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Josef Buysch, Norbert Schon, Herbert Eichenauer, Karl-Heinz Ott, Alfred Pischtschan
  • Patent number: 5061752
    Abstract: Thermoplastic moulding compositions composed ofI) 99.8-95% by weight of(A) 0-100% by weight of one or more graft polymers comprise the monomers styrene, .alpha.-methyl styrene, methyl methacrylate or a mixture of 95-50% by weight of styrene, .alpha.-methyl styrene, ring substituted styrene, methyl methacrylate or mixtures thereof with 5-50% by weight of methacrylonitrile, acrylonitrile, maleric acid anhydride, N-substituted malerimides or mixtures thereof, grafted onto a rubber substrate, andB) 100 to 0%, by weight of one or more thermoplastic vinyl polymers, andII) 0.2 to 5% by weight of a polyalkylene ether modified by a radical former which can be compounds conventionally used as an initiator for radical polymerization such as peroxides.
    Type: Grant
    Filed: June 29, 1989
    Date of Patent: October 29, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Josef Buysch, Norbert Schon, Herbert Eichenauer, Karl-Heinz Ott, Alfred Pischtschan
  • Patent number: 5028349
    Abstract: Elastic-thermoplastic or thermoplastic powder-form moulding compositions having uniform particles size and improved thermal stability and processes for their manufacture.
    Type: Grant
    Filed: March 30, 1988
    Date of Patent: July 2, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Alfred Pischtschan, Karl-Heinz Ott
  • Patent number: 4960822
    Abstract: Thermoplastic moulding compounds containing(A) from 5 to 90 parts by weight of one or more thermoplastic polymers,(B) from 5 to 90 parts by weight of one or more graft polymers and(C) from 0.25 to 40 parts by weight of a copolymer having a sequential structure corresponding to the idealized formula (I)(A-X-B).sub.n (I)whereinA=a polymer of a cyclic carbonate,B=a polymer of another cyclic ester andX=a middle member containing both partial structures of A and B.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: October 2, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Eichenauer, Edgar Leitz, Karl-Heinz Ott, Alfred Pischtschan
  • Patent number: 4959419
    Abstract: Polycarboxylic acids and their salts corresponding to the following general formula[X]--(NHOC--Y--COO M).sub.n (I)in whichX is the residue of a hydrophobic, linear or branched vinyl oligomer having an average molecular weight M.sub.n of from 200 to 5000 and preferably from 300 to 3000,Y is the 1,2-vinylene, 1,2-ethylene, 1,3-propylene, 1,2-phenylene, 1,2-cyclohexen-4-ylene or 1,2-cyclohexylene group,n is a number of from 1.4 to 3.0 and preferably from 1.6 to 2.3 andM is hydrogen, an alkali metal, an ammonium, C.sub.1 -C.sub.4 alkylammonium or C.sub.2 -C.sub.3 hydroxyalkylammonium group, which are useful as surfactants and emulsifiers in aqueous systems.
    Type: Grant
    Filed: December 16, 1987
    Date of Patent: September 25, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Adolf Schmidt, Udo W. Hendricks, Bruno Bomer, Karl H. Ott, Herbert Eichenauer, Alfred Pischtschan