Patents by Inventor Karl-Heinz Hentschel

Karl-Heinz Hentschel 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: 5502148
    Abstract: Two-component polyurethane coating compositions essentially containing A) a polyisocyanate component containing A1) certain aliphatic polyisocyanates and A2) certain aromatic polyisocyanates, B) a polyol component containing B1) selected polycaprolactone polyols and/or selected polyether polyols, and optionally B2) other organic polyhydroxyl compounds, and C) known additives used in surface coating technology; and the application of such coating compositions for the manufacture of floor sealers or thin coatings.
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: March 26, 1996
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Heinz Hentschel, Ulrich Walter, Bernd Riberi
  • Patent number: 5468833
    Abstract: Moisture-curing, one-component coating compositions wherein the binder contains a mixture of A) 100 parts by weight of a polyisocyanate or polyisocyanate mixture of the diphenylmethane series, B) 40 to 150 parts by weight of NCO prepolymers with an NCO content of 1.5 to 12% by weight based on aromatic polyisocyanates and C) 10 to 90 parts by weight of at least one aliphatic lacquer polyisocyanate and the use of the coating compositions for the production of coatings on various substrates.The present invention relates to moisture-curing one-component coating compositions containing as binder a polyisocyanate component containingA) 100 parts by weight of a polyisocyanate or polyisocyanate mixture of the diphenyl methane series having an NCO content of 20 to 33% by weight,B) 40 to 150 parts by weight of one or more NCO prepolymers which have an NCO content of 1.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: November 21, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jurgen Schwindt, Karl-Heinz Hentschel, Lutz Schmalstieg
  • Patent number: 5219975
    Abstract: The present invention is directed to a process for the preparation of amines containing urethane and urea groups. The amines are produced by reacting A) isocyanate prepolymers containing urethane groups and in which the isocyanate groups are reversibly blocked with secondary monoamines with B) amines having molecular weights of from 60 to 500, which are at least difunctional and which have a total of at least two primary or secondary amino groups, with splitting off of the secondary monoamine. The invention is also directed to the amines so produced and to the use as a hardener for an epoxide resin.
    Type: Grant
    Filed: May 7, 1991
    Date of Patent: June 15, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lutz Schmalstieg, Karl-Heinz Hentschel, Josef Pedain, Klaus Nachtkamp
  • Patent number: 5189176
    Abstract: The present invention relates to bis-oxazolidines corresponding to formula (II) ##STR1## wherein R represents a branched, saturated, aliphatic hydrocarbon radical containing 5 to 8 carbon atoms.The present invention also relates to oxazolidine mixtures, which are also suitable as hardeners for plastics precursors containing isocyanate groups, consisting essentially ofa) bis-oxazolidines corresponding to formula (II) above andb) 0.03 to 0.3 moles per mole of component (a), of compounds corresponding to formula (III) ##STR2## wherein R represents a saturated, branched, aliphatic hydrocarbon radical containing 5 to 8 carbon atoms.The present invention additionally relates to a process for the production of these oxazolidine mixtures and to their use in combination with polymer precursors containing isocyanate groups for coating or sealing compositions.
    Type: Grant
    Filed: July 1, 1991
    Date of Patent: February 23, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Harald Blum, Josef Pedain, Karl-Heinz Hentschel
  • Patent number: 4973414
    Abstract: Monofunctional polyethers having hydroxyl groups contain as built-in terminal groups or monomers(a) 1 to 30% by weight of one or more C.sub.4 - to C.sub.24 -alkylmonophenols,(b) 1 to 30% by weight of one or more C.sub.8 - to C.sub.24 -monoalkanols,(c) 1 to 30% by weight of one or more C.sub.10 - to C.sub.20 -1,2-epoxyalkanes and(d) 45 to 80% by weight of propylene oxide or a lower alkylene oxide mixture consisting mainly of propylene oxidethe sum of components (a) to (d) adding up to 100% by weight, and have average molecular weights of 600 to 2,500.These polyethers are prepared by anionic epoxide polymerization and used as lubricants and components of lubricants.
    Type: Grant
    Filed: May 17, 1988
    Date of Patent: November 27, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dittmar Nerger, Karl-Heinz Hentschel, Christian Rasp, Pramod Gupta, Siegfried Kussi
  • Patent number: 4770804
    Abstract: The invention relates to the use of combinations of water-soluble polymeric polyether polyols, in which at least 50% of the terminal hydroxyl groups are blocked by reaction with a monoisocyanate incorporating a long-chain aliphatic hydrocarbon radical, and certain surfactants as thickener systems for high water based functional fluids and to the thickened high water based functional fluids.
    Type: Grant
    Filed: August 25, 1986
    Date of Patent: September 13, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Heinz Hentschel, Christian Rasp, Siegfried Kussi, Udo-Winfried Hendricks
  • Patent number: 4666618
    Abstract: The new sulphur-containing polyether-urethanes are prepared by a polyaddition reaction of aromatic, cycloaliphatic and/or aliphatic polyisocyanates with(a) at least one aliphatic dialcohol containing a sulphur bridge, of the formula ##STR1## in which R.sup.1 to R.sup.8 are identical or different and denote hydrogen or an alkyl radical with 1 to 10 carbon atoms andx denotes the average number of sulphur atoms in the range from 1.5 to 4,if appropriate in the presence of(b) a polyethylene glycol and/or(c) a dialcohol which carries at least one anionic group and/or at least one diamine which carries an anionic group, and, if appropriate,(d) other cycloaliphatic, araliphatic or heterocyclic dialcohols and/or aromatic, cycloaliphatic or aliphatic diamines.The compounds can be used as anti-wear agents in aqueous hydraulic fluids and cooling lubricant concentrates.
    Type: Grant
    Filed: April 18, 1985
    Date of Patent: May 19, 1987
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Heinz Hentschel, Siegfried Kussi, Hansjurgen Botsch
  • Patent number: 4499000
    Abstract: Certain spirocyclic ketals of the formula ##STR1## in which R.sup.1 in the case where R.sup.2 denotes hydrogen, represents a cyclohexyl radical optionally substituted by lower alkyl, lower alkoxy and/or cycloalkyl with 5 to 7 carbon atoms, or in whichR.sup.1 and R.sup.2 are linked through 4 methylene groups, which are optionally substituted by lower alkyl, lower alkoxy and/or cycloalkyl with 5 to 7 carbon atoms and form a further acyclic ring.R.sup.3, R.sup.4 and R.sup.5 are identical or different and denote hydrogen, lower alkyl, lower alkoxy or cycloalkyl with 5 to 7 carbon atoms, andZ denotes alkylene with 2 to 4 carbon atoms which is optionally substituted by lower alkyl and/or cycloalkyl with 5 to 7 carbon atoms,are disclosed together with their use in power transmission fluids.
    Type: Grant
    Filed: February 18, 1983
    Date of Patent: February 12, 1985
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Heinz Hentschel, Rolf Dhein, Hans Winter, Herbert Vojacek
  • Patent number: 4490266
    Abstract: A composition comprising 96-99.9% by weight of a highly flame-resistant base oil such as an aromatic phosphate ester or a polychlorinated aromatic compound and a polyester of molecular weight, 20,000 to 300,000, derived from polytetramethylene glycol, for instance. The composition has an improved viscosity index and is especially useful as a HSD lubricant. It is also useful as a hydraulic fluid and/or heat transfer liquid. By addition of such a polyester to such base oil, the viscosity index of the base oil is considerably improved.
    Type: Grant
    Filed: May 24, 1983
    Date of Patent: December 25, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Heinz Hentschel, Bernhard Mussig, Rolf Dhein, Siegfried Kussi
  • Patent number: 4481123
    Abstract: The new polyethers obtainable by polymerization of an 1,2-epoxyalkane with 8 to 26 carbon atoms, and a tetrahydrofuran in the presence of a hydroxyl compound of the formulaH-OR.sup.1in which R.sup.1 denotes hydrogen, an alkyl radical having 1 to 24 carbon atoms or a hydroxyalkyl radical having 2 to 40 carbon atoms are disclosed together with their use as lubricants.
    Type: Grant
    Filed: April 22, 1982
    Date of Patent: November 6, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Heinz Hentschel, Rolf Dhein, Siegfried Kussi, Hans Winter, Herbert Vojacek
  • Patent number: 4424400
    Abstract: An oligoisobutylcyclohexane of the formula: ##STR1## wherein R.sup.1 -R.sup.5 are identical or different and independently denote hydrogen, a C.sub.1 -C.sub.4 - alkyl group, C.sub.1 -C.sub.4 -alkoxy group or a C.sub.1 -C.sub.4 -alkylthio substitutent and R.sup.6 denotes a branched chain C.sub.12 -C.sub.40 -alkyl group of trimeric to decameric isobutene,a process for preparing such oligoisobutylcyclohexanes and their use as dielectric liquids, lubricants, heat transfer media and the like.
    Type: Grant
    Filed: March 13, 1981
    Date of Patent: January 3, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Heinz Hentschel, Rolf Dhein
  • Patent number: 4362635
    Abstract: Esterification products of monoalcohols and dicarboxylic acids, or of polyhydric alcohols and monocarboxylic acids respectively, containing 5 to 45% by weight of units of hydroxycarboxylic acids and having a ratio of carbon to oxygen atoms greater than 4.1 obtained from (a) aliphatic C.sub.1 -C.sub.14 alcohols, (b) aliphatic C.sub.4 -C.sub.18 carboxylic acids and optionally cycloaliphatic C.sub.6 -C.sub.12 and aromatic C.sub.7 -C.sub.12 carboxylic acids, and (c) lactones of aliphatic C.sub.5 -C.sub.12 hydroxycarboxylic acids. They are suitable for the preparation of lubricants and lubricant compositions.
    Type: Grant
    Filed: October 29, 1980
    Date of Patent: December 7, 1982
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Dhein, Karl-Heinz Hentschel, Karl Nutzel, Klaus Morche, Wolfgang Schule
  • Patent number: 4292187
    Abstract: A condensation product from aliphatic or cycloaliphatic polyols, aliphatic saturated or once unsaturated hydroxycarboxylic acids and aliphatic or cycloaliphatic saturated or unsaturated monocarboxylic acids is an effective lubricant for the working of metals, optionally in admixture with other lubricating oils and conventional additives.
    Type: Grant
    Filed: March 6, 1980
    Date of Patent: September 29, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Heinz Hentschel, Rolf Dhein, Wolfgang Schule
  • Patent number: 4212816
    Abstract: An ester base stock which comprises pentaerythritol, cyclohexyl carboxylic acid, isostearic acid and at least one other C.sub.6 -C.sub.16 saturated aliphatic monocarboxylic acid, having low volatility, a high flashpoint, and increased basic viscosity as well as a very high viscosity index.
    Type: Grant
    Filed: December 20, 1978
    Date of Patent: July 15, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Heinz Hentschel, Rolf Dhein, Hans Rudolph, Karl Nutzel, Klaus Morche, Wolfgang Kruger
  • Patent number: 4178261
    Abstract: Carboxylic acid ester obtainable by reacting 6-cyclohexylhexanoic acid, optionally in combination with an aliphatic monocarboxylic acid which contains 4 to 20 C-atoms, completely or partially with a polyhydric alcohol, can be used as base lubricating oil.
    Type: Grant
    Filed: March 22, 1978
    Date of Patent: December 11, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Dhein, Karl-Heinz Hentschel