Patents by Inventor Silke Hellwig

Silke Hellwig 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: 11896998
    Abstract: Described herein is a method for producing a multicoat paint system by producing a basecoat or a plurality of directly successive basecoats directly on a substrate coated with a first coat, producing a clearcoat directly on the one or the topmost of the plurality of basecoats, and subsequently jointly curing the one or the plurality of basecoats and the clearcoat. At least one of the basecoat materials is admixed, directly before application, either with an aqueous dispersion (D1) including a polyamide (PA) having an acid number of 15 to 60 mg KOH/g or with an aqueous dispersion (D2) including a polyamide (PA) and an amide wax (AW).
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: February 13, 2024
    Assignee: BASF COATINGS GMBH
    Inventors: Dirk Eierhoff, Joerg Schwarz, Silke Hellwig
  • Publication number: 20210402434
    Abstract: The present invention relates to a method for producing a multicoat paint system by producing a basecoat or a plurality of directly successive basecoats directly on a substrate coated with a first coat, producing a clearcoat directly on the one or the topmost of the plurality of basecoats, and subsequently jointly curing the one or the plurality of basecoats and the clearcoat. At least one of the basecoat materials is admixed, directly before application, either with an aqueous dispersion (D1) comprising a polyamide (PA) having an acid number of 15 to 60 mg KOH/g or with an aqueous dispersion (D2) comprising a polyamide (PA) and an amide wax (AW).
    Type: Application
    Filed: September 30, 2019
    Publication date: December 30, 2021
    Inventors: Dirk Eierhoff, Joerg Schwarz, Silke Hellwig
  • Patent number: 6503981
    Abstract: A thermally curable hot-melt adhesive composition, comprises (A) a prepolymer having isocyanate groups, a number average molecular mass Mn of 700 to 6000 and wherein 50 to 100%, preferably 70-95%, of the reactive isocyanate groups of the prepolymer are blocked, the prepolymer being the reaction product of one or more at least semi-crystalline straight-chain polyesters; one or more amorphous or liquid straight-chain polyesters, optionally one or more polyethers, and one or more diisocyanates; and (B) at least one reactive component selected from the group consisting of diamines, epoxide adducts of diamines, and polyalcohols.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: January 7, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Silke Hellwig, Olaf Kleineberg, Heinz-Peter Pfeiffer
  • Publication number: 20020120088
    Abstract: A thermally curable hot-melt adhesive composition, comprises
    Type: Application
    Filed: December 22, 2000
    Publication date: August 29, 2002
    Inventors: Silke Hellwig, Olaf Kleineberg, Heinz-Peter Pfeiffer