Patents by Inventor Werner Stephan

Werner Stephan 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: 6686412
    Abstract: Pastes containing flatting agents and/or texture additives, containing A) 5 to 30 wt. % of one or more thixotropic (meth)acrylic copolymers and/or one or more thixotropic polyesters B) 15 to 45 wt. % of one or more flatting and/or texturing agents, C) 30 to 65 wt. % of one or more organic solvents and optionally wetting and dispersing agents, rheology modifiers, catalysts and optionally further additives and auxiliaries, wherein the proportions of components A), B) and C) add up to 100 wt. % and the weight ratio of thixotropic (meth)acrylic copolymer and/or thixotropic polyester: flatting and/or texturing agents is 1:6 to 1:0.8.
    Type: Grant
    Filed: December 11, 2000
    Date of Patent: February 3, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Günter Berschel, Udo Hellmann, Werner Stephan, Wolfgang Stricker
  • Patent number: 6162886
    Abstract: This invention relates to copolymers which contain hydroxyl groups and which are based on vinyl esters of monocarboxylic acids, wherein the copolymers which contain hydroxyl groups have an OH number of 110-170 mg KOH/g, an acid number of 5-35 mg KOH/g and a number average molecular weight M.sub.n of 1500-8000 g/mole and are obtainable by the polymerisation of A) 5-20% by weight of one or more vinyl esters of saturated monocarboxylic acids, B) 10-30% by weight of one or more aromatic vinyl hydrocarbons, C) 41-55% by weight of hydroxy-functional, polymerisable, unsaturated monomers, and D) 0-40% by weight of further polymerisable, unsaturated monomers, wherein component C) contains C1) 40-70% by weight of one or more hydroxyalkyl esters of .alpha.,.beta.-unsaturated monocarboxylic acids, C2) 1-10% by weight of one or more lactones, and C3) 30-55% by weight of one or more reaction products of an .alpha.,.beta.-unsaturated monocarboxylic acid with a glycidyl ester of a saturated .alpha.,.alpha.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: December 19, 2000
    Assignee: Herberts Gesellschaft mit Beschrankter Haftung
    Inventors: Gerhard Bremer, Hermann Kerber, Manfred Krumme, Olaf Ley, Werner Stephan, Jorg Wabbels
  • Patent number: 5902646
    Abstract: This invention relates to coating media based on one or more styrene-free, unsaturated polyester resins, which containA) one or more unsaturated polyesters obtainable by the reaction ofa) 0.5 to 1.0 mole of at least one alpha,beta-ethylenically unsaturated dicarboxylic acid or the anhydride thereof,b) 0 to 0.5 mole of at least one aromatic, aliphatic and/or cycloaliphatic saturated dicarboxylic acid or the anhydride thereof,c) 0.4 to 0.8 mole of at least one aliphatic saturated dihydric alcohol,d) 0.5 to 1.2 mole of at least one hydroxy-functional allyl ether,B) one or more polyglycol diacrylates of general formula ##STR1## where n=2-5 and m=2-5, particularly dipropylene glycol diacrylate, C) one or more initiators, andoptionally one or more organic solvents, one or more pigments and/or extenders, as well as accelerators, catalysts and/or customary lacquer additives.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: May 11, 1999
    Assignee: Herberts GmbH
    Inventors: Heinz Dietholf Becker, Gerhard Bremer, Werner Stephan
  • Patent number: 5807924
    Abstract: This invention relates to two-component, solvent-thinnable coating media based on a polyisocyanate component and a component which reacts with isocyanate. The coating media contain one or more hydroxy-functional copolymers, one or more secondary polyamines containing ester groups, one or more aliphatic and/or cycloaliphatic polyisocyanates containing allophanate groups, extenders and/or pigments and optionally one or more organic solvents and customary lacquer additives. 60 to 75% by weight of aluminium hydroxide and calcium magnesium carbonate are contained in total, with respect to the total amount of extenders and/or pigments.
    Type: Grant
    Filed: November 4, 1996
    Date of Patent: September 15, 1998
    Assignee: Herberts GmbH
    Inventors: Heinz Dietholf Becker, Gerhard Bremer, Werner Stephan
  • Patent number: 5731382
    Abstract: Coating agents are described, that are suitable for the production of pigmented or transparent top coatings, based on hydroxy-functional (meth)acrylic copolymers, aliphatic and/or cycloaliphatic polyisocyanates, solvents, and customary lacquer additives and pigments. They are free from epoxy resins and nitrocellulose and contain as binderA) one or more (meth)acrylic copolymers, containing hydroxyl groups, froma1) 47-53 wt % of one or more aromatic vinyl compounds,a2) 28-33 wt % of one or more hydroxyalkyl methacrylates,a3) 14-19 wt % of one or more alkyl (meth)acrylates, anda4) 0.5-2 wt % acrylic acid and/or methacrylic acid,with a hydroxyl number of 120-160 mg KOH/g, an acid number of 5 to 15 mg KOH/g, a weight-average molecular weight of 10,000 to 20,000 and a glass transition temperature of +40.degree. C. to +60.degree. C., andB) an aliphatic and/or cycloaliphatic polyisocyanate or a mixture of such polyisocyanates in such an amount that 0.5 to 2.
    Type: Grant
    Filed: September 24, 1996
    Date of Patent: March 24, 1998
    Assignee: Herberts GmbH
    Inventors: Klaus Bederke, Gerhard Bremer, Hermann Kerber, Manfred Krumme, Fritz Sadowski, Werner Stephan, Olaf Ley
  • Patent number: 5708117
    Abstract: The description relates to coating agents for use as primers and fillers in the manufacture of multilayer lacquer coatings, more particularly in the motor-vehicle sector.The coating agent contains a binder mixture ofA) 60-75 wt. % of a hydroxy-functional copolymer with an OH number of 110 to 170 mg KOH/g, obtainable froma) 5-60 wt. %, preferably 10-30 wt. % of at least one diester of an alpha, beta-olefinically unsaturated dicarboxylic acid with saturated monohydric alcohols containing 1-8 carbon atoms,b) 10-70 wt. %, preferably 35-60 wt. % of one or more vinyl aromatic hydrocarbons,c) 0-30 wt. %, preferably 0-15 wt. % of one or more glycidyl esters of aliphatic saturated monocarboxylic acids branched in the alpha position,d) 25-50 wt. % of at least one hydroxy alkyl ester or a mixture of at least one alkyl ester and one hydroxyl alkyl ester of an alpha, beta-olefinically unsaturated monocarboxylic acid, ande) 0-10 wt. % of one or more alpha, beta-unsaturated monocarboxylic acids,B) 1-6 wt.
    Type: Grant
    Filed: March 11, 1996
    Date of Patent: January 13, 1998
    Assignee: Herberts Gesellschaft mit Beschrankter Haftung
    Inventors: Heinz Dietholf Becker, Gerhard Bremer, Fritz Sadowski, Werner Stephan
  • Patent number: 5700330
    Abstract: Process for cleaning equipment and equipment cleaner for implementing the process.The invention relates to a process for cleaning equipment contaminated with lacquer residues, in which the lacquer residues are removed with a solvent mixture and an equipment cleaner based on a solvent mixture for implementing the process. The solvent mixture containsA) 15-35 wt. % of one or more glycol ethers of the general formula IOH--(CH.sub.2 --CH.sub.2 --O).sub.m --R.sub.1 Iwhere R.sub.1 =C.sub.1-4 -alkyl and m=1 or 2 andB) 65-85 wt. % of one or more aliphatic ketones of the general formula II ##STR1## where R.sub.2=C.sub.1-3 -alkyl and R.sub.3 =C.sub.1-3 -alkyl and R.sub.2 and R.sub.3 may be identical or different.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: December 23, 1997
    Assignee: Herberts Gesellschaft mit beschrankter Haftung
    Inventors: Wolfgang Stricker, Udo Hellmann, Werner Stephan
  • Patent number: 5691417
    Abstract: A coating medium suitable for multilayer coatings, containingA) copolymers containing hydroxyl groups, comprisinga1) 8-12% by weight of vinyl esters of alpha, alpha,dialkyl-substituted, branched, aliphatic saturated monocarboxylic acids,a2) 32-42% by weight of hydroxyalkyl esters of (meth)acrylic acid,a2) 25-40% by weight of alkyl esters of (meth)acrylic acid,a4) 12-24% by weight of cycloalkyl esters of (meth)acrylic acid, anda5) 2-4% by weight of (meth)acrylic acidwith a hydroxyl number of 100-160 mg KOH/g, an acid number of 10-50 mg KOH/g, a number average molecular weight (Mn) of 1000 to 3000 g/mole and a glass transition temperature (Tg) of 30.degree.-80.degree. C.,B) polyisocyanates in a quantitative proportion such that 0.5 to 2 isocyanate groups are allotted to one hydroxyl group of component A), andC) solvents and optionally one or more pigments, extenders and/or customary lacquer additives.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: November 25, 1997
    Assignee: Herberts Gesellschaft mit Beschrankter Haftung
    Inventors: Gerhard Bremer, Hermann Kerber, Manfred Krumme, Olaf Ley, Werner Stephan
  • Patent number: 5677379
    Abstract: A binder composition for coating agents containsA.sub.1) C--H-acid compounds obtainable by polymerization of hydroxyfunctional and non-hydroxyfunctional monomers, polyols and .beta.-keto carboxylic acid esters and subsequent esterification of the hydroxy groups with the .beta.-keto carboxylic acid esters,A.sub.2) C--H-acid compounds obtainable by transesterification of polyols with .beta.-keto carboxylic acid esters,.alpha.,.beta.-unsaturated compounds with at least two groups having the formulaR.sub.1 R.sub.2 C.dbd.CR.sub.3 --CO--bonded to at least one additional group R.sub.1 R.sub.2 C.dbd.CR.sub.3 --CO-- via the radical of a polyalcohol, polyamine or amino alcohol,C) polyglycidyl compound,D) polyamine hardeners,E) Lewis or Bronstedt bases andF) polysiloxane compounds.
    Type: Grant
    Filed: December 20, 1995
    Date of Patent: October 14, 1997
    Assignee: Herberts Gesellschaft mit beschrankter Haftung
    Inventors: Heinz-Dietholf Becker, Gerhard Bremer, Carmen Flosbach, Hermann Kerber, Walter Schubert, Werner Stephan, Jorg Wabbels
  • Patent number: 5480936
    Abstract: Oligoester acrylate resins having a high content of solids and comparatively low viscosity, and aqueous coating agents with a low content of organic solvents for obtaining coatings with high resistance to chemicals, more particularly high resistance to acids and oily soot, and very low tendency to yellowing.
    Type: Grant
    Filed: May 27, 1994
    Date of Patent: January 2, 1996
    Assignee: Herberts Gesellschaft mit beschranker Haftung
    Inventors: Volker Duecoffre, Carmen Flosbach, Walter Schubert, Manfred Krumme, Werner Stephan, Fritz Sadowski
  • Patent number: 5420205
    Abstract: A binder composition suitable for coating agents is described, that contains one or more unsaturated polyesters with an acid number of 5-60 mg KOH/g, a hydroxyl number of 50-200 mg KOH/g and a weight-average molecular weight (Mw) of 500-3000 g/mol, that are obtainable by reaction ofA) one or more alpha,beta-ethylenically unsaturated dicarboxylic acids or their anhydrides,B) one or more hydroxy-functional allyl ethers andC) one or more ethylenically unsaturated compounds with an oxirane group in the molecule,in the molar ratio of A):B):C)=(2 to 4):(2 to 4):(0.5 to 1.8). The composition is suitable in particular for filling putties and filling compounds that dry rapidly, even at low temperatures.
    Type: Grant
    Filed: June 20, 1994
    Date of Patent: May 30, 1995
    Assignee: Herberts Gesellschaft mis beschrankter Haftung
    Inventors: Heinz D. Becker, Klaus Bederke, Gerhard Bremer, Herrmann Kerber, Birgit Precht, Fritz Sadowski, Werner Stephan
  • Patent number: 5412000
    Abstract: A coating and primer composition suitable as a primer for plastics such as a polyolefin which comprises: a) from about 1 to 5% by weight of ethylene/vinyl acetate copolymers, b) from about 0.5 to 5% by weight of chlorinated polyolefins, c) from about 0.01 to 5% by weight of an epoxy resin; and d) from about 85 to 98.49% by weight of an organic solvent, and optionally paint auxiliaries, pigments and/or fillers.A method of priming plastic surfaces of an object, especially polyolefins, and particularly polypropylene, is also provided which comprises applying the aforesaid composition to a plastic surface and drying the same prior to applying paint or finish coating.
    Type: Grant
    Filed: March 17, 1994
    Date of Patent: May 2, 1995
    Assignee: Herberts Gesellschaft mit beschrankter Haftung
    Inventors: Udo Hellmann, Werner Stephan, Fritz Sadowski
  • Patent number: 5136004
    Abstract: The invention concerns a binder suitable for clear or pigmented coating agents. Binders based on copolymers containing hydroxyl groups have hitherto a high solvent content. The solids content of the new binders is improved without affecting the viscosity; gloss, body, flow and processing properties of coatings containing the new binders are improved. The binders consist essentially of a copolymer containing hydroxyl groups, made from specific quantities of styrol, tertbutacrylate, isobutyl methacrylate, 2-ethylhexyl methacrylate, 2-hydroxypropyl methacrylate, butanediol-1, 4-monoacrylate, acrylic acid and glycidyl esters of .alpha.-alkylalkane monocarboxylic acids and/or .alpha.,.alpha.-dialkylalkane monocarboxylic acids.
    Type: Grant
    Filed: November 13, 1990
    Date of Patent: August 4, 1992
    Assignee: Herberts Gesellschaft mit beschrankter Haftung
    Inventors: Klaus Bederke, Hermann Kerber, Manfred Krumme, Fritz Sadowski, Werner Stephan
  • Patent number: 4877220
    Abstract: Hexasubstituted cyclohexane compounds of the formula I ##STR1## in which Z.sup.1, Z.sup.2, Z.sup.3, X.sup.1, X.sup.2, A.sup.1, A.sup.2 and A.sup.3, p, R.sup.1 and R.sup.2, m and (n+m) have the meanings given in claim 1, are suitable as components of discotic liquid-crystalline phases.
    Type: Grant
    Filed: September 11, 1987
    Date of Patent: October 31, 1989
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Klaus Praefcke, Bernd Kohne, Werner Stephan
  • Patent number: 4855342
    Abstract: Previous coating materials lead to the formation of bubbles at high layer thickness and when drying by heating. The new coating materials are intended to be bubble-free when dried at higher layer thicknesses.Aside from pigments and/or extenders, the coating material contains solvents and, if necessary, conventional paint auxiliaries in a vehicle mixture, comprising essentially 60-75% by weight of a hydroxy-functional copolymer, 1-5% by weight of an ester-soluble nitrocellulose and 25-35% by weight of difunctional or multifunctional polyisocyanate. It can be cured without forming bubbles even when applied in thick layers.Use as primer and filler.
    Type: Grant
    Filed: November 19, 1987
    Date of Patent: August 8, 1989
    Assignee: Herberts Gesellschaft
    Inventors: Heinz D. Becker, Klaus Bederke, Ralf Dahm, Hermann Kerber, Fritz Sadowski, Werner Stephan