Patents by Inventor Hellmut Buensch

Hellmut Buensch 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).

  • Hardenable polyester molding materials
    Patent number: 4670485
    Abstract: A hardenable polyester molding material contains a mixture ofI. an ethylenically unsaturated ester or a terminally unsaturated vinyl ester,II. copolymerizable monomers,III. 6-25% by weight, based on I+II, or a graft polymer P, in which there are grafted onA. 5-95% by weight of an elastomeric polymer,B. 95-5% by weight of a polyadduct, polycondensate or acrylic polymer which contains olefinic double bonds, with or withoutC. 0-90% by weight of vinyl monomers, andIV. 5-300% by weight, based on I+II, of fibrous reinforcing agents.
    Type: Grant
    Filed: July 25, 1986
    Date of Patent: June 2, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Anton Hesse, Hellmut Buensch, Bernhard Czauderna
  • Photopolymerizable recording materials containing cyclic pentadienes for the production of printing plates, and the production of printing plates using these recording materials
    Patent number: 4643963
    Abstract: For the production of printing plates, in particular lithographic printing plates by exposing a photopolymerizable recording material imagewise to actinic light and then effecting development with an aqueous alkaline developer, it is proposed to use photopolymerizable recording materials possessing a photopolymerizable copying layer (L) applied on a dimensionally stable base, where, in addition to containing ethylenically unsaturated photopolymerizable low molecular weight compounds, one or more photoinitiators, dyes and/or pigments, and, if required, further additives and/or assistants, the said copying layer (L) also contains, as a binder, one or more oligomeric and/or relatively high molecular weight copolymers which are soluble or dispersible in aqueous alkaline media and are based on cyclic dienes, in particular unsubstituted or substituted cyclopentadiene or unsubstituted or substituted di- or tricyclopentadiene.
    Type: Grant
    Filed: October 31, 1984
    Date of Patent: February 17, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Heinrich Hartmann, Gerhard Hoffmann, Hellmut Buensch, Reiner Hofmann
  • Mixtures, for polyurethane adhesives, which consist of polyols and/or polyamines and polyisocyanates, are liquid at room temperature, have a long shelf life and can be activated by heat
    Patent number: 4543393
    Abstract: Mixtures which are liquid at room temperature, have a long shelf life and can be activated by heat and which comprise(A) polyols and/or polyamines, component (A) having a viscosity of less than 100 Pa.s at room temperature, the OH number being less than 112 and the mean functionality of the starting materials being from 1.1 to 6, and(B) polyisocyanates which are dispersed in (A), are stabilized to (A) as a result of a phase-separating deactivation at the surface of the dispersed particles, and are present in an amount such that there are from 0.1 to 2 equivalents of the total isocyanate present in the polyisocyanate per equivalent of hydroxyl or amino groups of component (A),are particularly useful for contact adhesives.
    Type: Grant
    Filed: July 16, 1984
    Date of Patent: September 24, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Rainer Blum, Hellmut Buensch, Wolfgang Druschke, Helmut Mueller