Patents by Inventor Josef Schwaab

Josef Schwaab 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: 5252666
    Abstract: A particulate graft polymer comprises from 30 to 90% by weight, of at least one elastomeric polymer A having a median particle size of from 30 to 1000 nm comprising--based on A--from 85 to 99.8% by weight of at least one alkyl acrylate A1 having from 1 to 8 carbon atoms in the alkyl moiety, from 0.1 to 5% by weight of at least one polyfunctional, crosslinking monomer A2 and from 0.1 to 10% by weight of at least one further monoethylenically unsaturated monomer as grafting base, and from 10 to 70% by weight, grafted onto the elastomeric polymer A, of a sheath B comprising--based on B--from 50 to 90% by weight of at least one aromatic vinyl monomer B1 and from 10 to 50% by weight of at least one polar, copolymerizable, ethylenically unsaturated monomer B2, wherein monomer A3 is a hydroxyalkyl acrylate or methacrylate.
    Type: Grant
    Filed: March 1, 1991
    Date of Patent: October 12, 1993
    Assignee: BASF Aktiengesellschaft
    Inventors: Friedrich Seitz, Karl Ruppmich, Josef Schwaab
  • Patent number: 4605699
    Abstract: A thermoplastic molding material consists of from 10 to 90 parts by weight of a polycarbonate A and from 90 to 10 parts by weight of a graft copolymer B having a mean particle size of from 200 to 700 nm (d.sub.50 value of the integral mass distribution). The graft polymer B is formed from an elastomer (rubber) (b.sub.1), which accounts for from 10 to 80% by weight, and a grafted shell (b.sub.2), which accounts for from 90 to 20% by weight, the percentages in each case being based on (B).The elastomer (b.sub.1) is composed of from 50 to 99.9% by weight of an alkyl acrylate, where alkyl is of 1 to 8 carbon atoms, and from 0.1 to 5% by weight of a copolymerizable polyfunctional crosslinking monomer.The grafted shell (b.sub.2) is produced in three stages and contains, as graft monomers,(b.sub.2 a.sub.1) from 5 to 40% by weight of a monoethylenically unsaturated aromatic hydrocarbon of not more than 12 carbon atoms,in the first stage,(b.sub.2 a.sub.
    Type: Grant
    Filed: April 11, 1985
    Date of Patent: August 12, 1986
    Assignee: BASF Aktiengesellschaft
    Inventors: Konrad Mitulla, Juergen Hambrecht, Adolf Echte, Johann Swoboda, Peter Siebel, Josef Schwaab, Herbert Frank
  • Patent number: 4442263
    Abstract: Thermoplastic molding materials contain a copolymer A and a graft copolymer B. The copolymer A is a hard component comprising one or more copolymers of styrene and/or .alpha.-methylstyrene with from 20 to 40% by weight of acrylonitrile.The graft copolymer B comprises one or more crosslinked acrylate polymer with a mean particle size of 0.5-0.8 .mu.m (d.sub.50 value of the cumulative mass distribution), a particle distribution, expressed by the ratio ##EQU1## in the range Q.gtoreq.0.6, and a glass transition temperature Tg below 0.degree. C. A mixture of styrene and acrylonitrile in a weight ratio from 88:12 to 65:35 is grafted onto this rubber.
    Type: Grant
    Filed: July 16, 1982
    Date of Patent: April 10, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz Brandstetter, Juergen Hambrecht, Rudolf Stephan, Heinz-Juergen Overhoff, Josef Schwaab, Claus Bernhard, Johann Swoboda, Adolf Echte
  • Patent number: 4435541
    Abstract: Thermoplastic molding masses based on the copolymerization of styrene and/or .alpha.-methylstyrene and acrylonitrile, which may be modified to be impact resistant with rubberlike polymers, are made antistatic by adding 0.01 to 1.5 percent by weight of a graft polyol which is a polyhydroxy-polyalkylene polyether modified with styrene-acrylonitrile copolymers.
    Type: Grant
    Filed: March 25, 1982
    Date of Patent: March 6, 1984
    Assignee: Dr. Beck & Co. AG
    Inventors: Franz Brandstetter, Juergen Hambrecht, Bernhard Scharf, Gerhard Lindenschmidt, Josef Schwaab, Rudolf H. Jung
  • Patent number: 4421875
    Abstract: The invention relates to a process for the manufacture of impact resistant thermoplastic molding materials wherein potassium salts of saturated or unsaturated fatty acids with 10 to 30 carbon atoms are used as emulsifier.
    Type: Grant
    Filed: April 8, 1982
    Date of Patent: December 20, 1983
    Assignee: BASF Aktiengesellschaft
    Inventors: Graham E. McKee, Franz Brandstetter, Adolf Echte, Juergen Hambrecht, Heinz-Juergen Overhoff, Edmund Priebe, Josef Schwaab, Peter Siebel