Patents by Inventor Hans-Heribert Burgdorfer

Hans-Heribert Burgdorfer 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: 5422413
    Abstract: The present invention relates to a thermosetting coating composition based on a binder composition containingA) prepolymers containing isocyanate groups blocked with .epsilon.-caprolactam, having an average molecular weight of 1000 to 10,000 and prepared fromA1) aromatic polyisocyanates andA2) a component containing at least one organic compound having hydroxyl groups wherein 50 to 100 hydroxyl equivalent percent of component A2) is based on polyesters containing hydroxyl groups and 0 to 50 hydroxyl equivalent percent is based on polyhydroxyl compounds which are free from ester groups andB) a hardener component containing at least one cycloaliphatic polyamine having at least two primary amino groups,in an equivalent ratio of blocked isocyanate groups to amino groups of 1:1 to 1:1.5.The invention also relates to use of the coating compositions to produce stoving-resistant gravel-proof primer coatings on optionally pretreated metal substrates.
    Type: Grant
    Filed: October 5, 1992
    Date of Patent: June 6, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Eberhard Konig, Friedrich P. A. Schrader, Lilli M. Schrader nee Guse, Elke Luckgen nee Schrader, Stefan Schrader, Hans-Heribert Burgdorfer
  • Patent number: 5280062
    Abstract: The present invention relates to aqueous polyesters for high-solids stoving coatings which containa) 35.0 to 65.0% by weight of a polyester resin containing urethane, carboxyl and hydroxyl groups and containing the reaction product of77 to 89% by weight of a branched polyester polyol having a hydroxyl number of 125 to 175, an acid number of less than 4 and a molecular weight of 2,500 to 6,500,2) 2.5 to 4.5% by weight of a 2,2-bis-(hydroxymethyl)alkane carboxylic acid,3) 0 to 3.5% by weight of a diol component having a molecular weight of 62 to 250 and4) 9 to 19% by weight of a diisocyanate component,wherein the percentages of a1), a2), a3) and a4) add up to 100%, based on the weight of a1), a2), a3) and a4),b) 0.1 to 1.5% by weight of a basic neutralizing agent which is sufficient to convert 35 to 100% of the carboxyl groups of component a) to carboxylate groups,c) 0 to 7.5% by weight of an organic auxiliary solvent andd) 26 to 64.
    Type: Grant
    Filed: January 15, 1992
    Date of Patent: January 18, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Harald Blum, Hans-Heribert Burgdorfer, Armin Sickert, Peter Hohlein
  • Patent number: 5216107
    Abstract: The present invention relates to a binder composition containinga) 20 to 70% by weight of oligomerization products of 1,6-diisocyanatohexane, the oligomerization products having isocyanate groups at least partially blocked with blocking agents for isocyanate groups and containing at least 50% by weight, based on the weight of the oligomerization products, of blocked uretdione diisocyanates corresponding to formula (I) ##STR1## wherein R represents the residue formed by removal of the active hydrogen atom from a monofunctional blocking agent, andb) 30 to 80% by weight of a polyol component containing a mixture ofb1) 100 parts by weight of an alkoxylation product of bisphenol A corresponding to formula (II) ##STR2## wherein R' is hydrogen or a methyl group and n is a whole or fractional number from 1 to 2,b2) 20 to 200 parts by weight castor oil andb3) 0 to 40 parts by weight of other organic polyhydroxyl compounds.
    Type: Grant
    Filed: July 10, 1991
    Date of Patent: June 1, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Josef Pedain, Friedrich Schrader, Dieter Mager, Hans-Heribert Burgdorfer
  • Patent number: 5126393
    Abstract: The present invention relates to a water-dispersible binder composition which is suitable for the production of a stoving filler to be processed from the aqueous phase and which containsa) 65 to 95% by weight of a urethane-modified polyester resin containing carboxyl groups,b) 5 to 35% by weight of a crosslinker resin andc) 0 to 2% by weight of an emulsifier,wherein the percentages are based on the total weight of components a) to c), characterized in that component a) has an acid value of 15 to 36, a hydroxyl value of at least 40 and a molecular weight (M.sub.
    Type: Grant
    Filed: October 24, 1990
    Date of Patent: June 30, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Harald Blum, Jurgen Meixner, Josef Pedain, Hans-Heribert Burgdorfer
  • Patent number: 4910046
    Abstract: A paint resin for powder coating is described which consists of modified high-pressure polyethylene (LDPE) and is characterized by(a) a content from 0.1 to 1 mol %, based on the total number of moles of all monomers, of unsaturated carboxylic acids present as copolymerized units, and/or the equivalent content of carboxylic anhydrides,(b) a neutralization degree of the carboxyl groups, which can also originate from anhydride groups, from 0 to less than 50%,(c) a termonomer content from 0 to 5 mol %, based on the total number of moles of all monomers,(d) a melt flow index from 20 to 200 g/10 minutes (190.degree. C.; 2.16 kp) and(e) a particle size from 1 to 600 .mu.m,as well as the use thereof in a process for powder coating.
    Type: Grant
    Filed: October 25, 1988
    Date of Patent: March 20, 1990
    Assignees: EC Erdolchemie GmbH, Bayer Aktiengesellschaft
    Inventors: Jens Herwig, Hans-Heribert Burgdorfer, Dieter Woltjes
  • Patent number: 4774137
    Abstract: This invention relates to synthetic resin powders for coating agents and the use thereof for the production of coatings with reduced surface resistance.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: September 27, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heinrich Alberts, Hans-Heribert Burgdorfer
  • Patent number: 4514546
    Abstract: This invention relates to the production and use of coating powders based on saponified ethylene/vinyl acetate copolymers (EVA copolymers) modified with polyalkyl (meth) acrylates. Coatings and films produced from these coating powders are distinguished by the flexibility and elasticity thereof, especially at low temperatures.
    Type: Grant
    Filed: February 6, 1984
    Date of Patent: April 30, 1985
    Assignee: Bayer Aktiengesellschaft
    Inventors: Raoul Resz, Heinrich Alberts, Hans-Heribert Burgdorfer, Aziz El Sayed
  • Patent number: 4456642
    Abstract: A gel of specific composition is encased in a flexible elastic casing to form a gel pad. The gel used is made up of (a) 15-62 weight % (based on (a)+(b)) of a high molecular weight covalently cross-linked polyurethane matrix and (b) 85-38 weight % (based on (a)+(b)) of a liquid dispersing agent. The liquid dispersing agent is a polyhydroxy compound having an average molecular weight between 1000 and 12,000, and an OH number between 20 and 112. This dispersing agent contains essentially no hydroxy compounds with a molecular weight below 800. The gel may also include fillers and/or additives known to those in the art. Suitable casing materials include polyurethane films, woven fabrics, knitted fabrics, and mesh fabrics. These gel pads are particularly useful as mattress, mattress inserts, wheelchair cushions, car seats, car seat supports and as pad elements for upholstered furniture.
    Type: Grant
    Filed: January 22, 1982
    Date of Patent: June 26, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Heribert Burgdorfer, Dietmar Schapel, Gottfried Schneider, Wulf von Bonin, Ulrich von Gizycki
  • Patent number: 4430492
    Abstract: The present invention relates to polycarbonate compounds characterized in that dimeric fatty acid ester soft segments are co-condensed therein. The invention further relates to processes for preparation of these compounds and their use in films and molded articles.
    Type: Grant
    Filed: August 28, 1980
    Date of Patent: February 7, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Manfred Schreckenberg, Hans-Heribert Burgdorfer, Rolf Dhein, Gottfried Schneider
  • Patent number: 4333809
    Abstract: The present invention is directed to cross-linkable, thermoplastically processable, segmented, high molecular weight polycarbonate elastomers, to the process for their preparation and to their use in their cross-linked form.
    Type: Grant
    Filed: July 22, 1980
    Date of Patent: June 8, 1982
    Assignee: Bayer Aktiengesellschaft
    Inventors: Manfred Schreckenberg, Dieter Freitag, Hans-Heribert Burgdorfer, Gunther Lehnert, Siegfried Adelmann, Hans Rudolph