Patents by Inventor Rolf Dhein

Rolf Dhein 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: 4267082
    Abstract: An air-cross-linkable lacquer binder comprising a copolymer of copolymerized units of from 10 to 40% by weight of glycidyl acrylate, glycidyl methacrylate or a mixture thereof, and 70 to 10% by weight of at least one other vinyl monomer which has been reacted with (based in each case on the quantity of lacquer binder) of from 0.01 to 30% by weight of at least one wood preservative having at least one glycidyl-reactive hydrogen atom and from 20 to 60% by weight of at least one air-drying natural or isomerized fatty acid and from 0 to 10% by weight of a dicarboxylic acid anhydride, said lacquer binder having an average molecular weight M.sub.n of from 1500 to 15,000 and an acid number of from 3 to 15. One special advantage of the lacquer binder according to the invention is that the wood preservatives are chemically fixed to the polymer molecule so that their release is retarded and the protective action is prolonged.
    Type: Grant
    Filed: April 30, 1979
    Date of Patent: May 12, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Dhein, Gerswid Poetter, Hans Rudolph
  • Patent number: 4255560
    Abstract: Copolyamides with improved properties are obtained by polycondensing aliphatic and/or aromatic dicarboxylic acids with an amine mixture of diaminodicyclohexyl methanes and optionally homologous polycyclohexyl polyamines and one or more aliphatic diamines, said copolyamide being useful for the production of shaped articles such as films, sheets and injection moldings.
    Type: Grant
    Filed: December 12, 1979
    Date of Patent: March 10, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf-Volker Meyer, Rolf Dhein, Friedrich Fahnler, Dietrich Michael, Hans Rudolph, Werner Nielinger
  • Patent number: 4248978
    Abstract: Compounds having a melting point above 40.degree. C. which compounds contain uretone imine groups and which are substantially free from volatile isocyanate blocking agents which are split off under stoving conditions are excellent crosslinking agents for pulverulent coating compositions based on hydroxyl groups-containing polymers.
    Type: Grant
    Filed: May 2, 1979
    Date of Patent: February 3, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Eckhard de Cleur, Rolf Dhein, Hans Rudolph, Hans J. Kreuder, Hanns P. Muller, Walter Schafer, Kuno Wagner, Kurt Findeisen
  • Patent number: 4225483
    Abstract: Phosphite-free polycarbonate molding compositions are provided which contain either a boric acid ester containing oxetane groups, a mixture of a boric acid ester containing oxetane groups and a boron-free oxetane compound or a mixture of a boric acid ester which is free from oxetane groups and a boron-free oxetane compound, in amounts between about 0.01 and 1% by weight, relative to the weight of pure polycarbonate resin. A process for stabilizing phosphite-free polycarbonate compositions to light and heat without impairing their resistance to hydrolysis is also provided by the incorporation of either a boric acid ester containing oxetane groups, a mixture of a boric acid ester containing oxetane groups and a boron-free oxetane compound or a mixture of a boric acid ester which is free from oxetane groups and a boron-free oxetane compound.
    Type: Grant
    Filed: October 20, 1978
    Date of Patent: September 30, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Erich Eimers, Rolf Dhein, Wolfgang Cohnen
  • Patent number: 4223127
    Abstract: Transparent copolyamides obtained by polycondensing a lactam or a corresponding amino acid, an aliphatic and/or aromatic dicarboxylic acid and a mixture of hydrogenated condensation products of aniline and formaldehyde.
    Type: Grant
    Filed: July 18, 1978
    Date of Patent: September 16, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf-Volker Meyer, Rolf Dhein, Hans Rudolph
  • 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: 4205159
    Abstract: A transparent polyamide which is the polycondensation product of bis-(4-aminocyclohexyl)-methane and a mixture of azelaic acid and at least one acid selected from group consisting of isophthalic acid and adipic acid. Up to 30 mol % of said bis-(4-aminocyclohexyl)-methane may also be replaced with hexamethylene diamine or another C.sub.8 -C.sub.15 cycloaliphatic diamine. Said transparent polyamide is useful for the production of sheets, films, plates, tubes, rods and containers of various types by extruding or molding.
    Type: Grant
    Filed: July 17, 1978
    Date of Patent: May 27, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf-Volker Meyer, Rolf Dhein, Friedrich Fahnler
  • Patent number: 4195164
    Abstract: Transparent copolyamides obtained by polycondensation of mixtures of positional isomeric diaminodicyclohexyl methanes and optionally further diamines and azelaic acid and optionally isophthalic and/or adipic acid. The copolyamides are valuable moulding compounds for the manufacture of various products such as sheets, films, plates, tubes, rods and containers.
    Type: Grant
    Filed: July 17, 1978
    Date of Patent: March 25, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf-Volker Meyer, Rolf Dhein, Friedrich Fahnler
  • Patent number: 4195163
    Abstract: Processes for the production of polyamides by polymerizing lactams in the presence of a catalyst and anisocyanatoallophanate as activator.
    Type: Grant
    Filed: October 16, 1978
    Date of Patent: March 25, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf-Volker Meyer, Rolf Dhein, Friedrich Fahnler
  • Patent number: 4191819
    Abstract: A process for the activated anionic polymerization of lactams wherein as activator a fluid partially masked aliphatic araliphatic or cycloaliphatic polyisocyanate being masked with 0.5-0.7 equivalents of lactam per equivalent of NCO groups is used.
    Type: Grant
    Filed: August 12, 1977
    Date of Patent: March 4, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf-Volker Meyer, Rolf Dhein, Kurt Schneider, Friedrich Fahnler
  • Patent number: 4186116
    Abstract: An air-drying and oven-drying lacquer binder based on a copolymer having copolymerized units of5 to 40% by weight of styrene,10 to 50% by weight of at least one hydroxyalkyl(meth)acrylate with 2 to 4 carbon atoms in the alkyl group, and10 to 40% by weight of at least one (meth)acrylic acid ester with 1 to 10 carbon atoms in the alcohol component, esterified with10 to 50% by weight, based on the copolymer and drying fatty acid and dicarboxylic acid anhydride, of a drying fatty acid,from 10 to 70 mole % of the hydroxyl groups of the incorporated hydroxyalkyl(meth)acrylate units having been esterified with the drying fatty acid and thereafter from 0.5 to 20 mole % of the hydroxyl groups of the incorporated hydroxyalkyl(meth)acrylate units having been reacted with from 0.
    Type: Grant
    Filed: June 20, 1978
    Date of Patent: January 29, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Dhein, Lothar Fleiter, Wolfgang Beer
  • Patent number: 4180493
    Abstract: A coating composition for polycarbonate surfaces comprising a mixture of:(A) 86% to 98% by weight of hydroxyl-group-containing copolymers with copolymerized units of:(a) 20% to 32% by weight of at least one aromatic vinyl monomer,(b) 8% to 18% by weight of at least one hydroxylalkyl ester of acrylic or methacrylic acid containing from 2 to 12 carbon atoms in the alkyl group, and(c) 50% to 70% by weight of at least one acrylic or methacrylic acid ester containing from 1 to 8 carbon atoms in the saturated aliphatic monoalcohol component and/or a mixture thereof; and(B) 2 to 14% by weight of at least one melamine resin.
    Type: Grant
    Filed: April 14, 1978
    Date of Patent: December 25, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Harald Selbeck, Rolf Dhein, Wolfgang Cohnen
  • 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
  • Patent number: 4171294
    Abstract: An alkyd resin stoving lacquer with decreased loss of reactive diluent yields outstandingly hard coatings if a reactive diluent mixture comprising a lactam and a hydroxyl compound is used.
    Type: Grant
    Filed: March 15, 1978
    Date of Patent: October 16, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Dhein, Peter Hohlein, Rolf Kuchenmeister, Wolfgang Beer
  • Patent number: 4146519
    Abstract: Air-drying lacquer binders comprising copolymers of copolymerised units of20 to 55% by weight of styrene,5 to 30% by weight of glycidyl (meth)acrylate, and0 to 50% by weight of at least one (meth)acrylic acid ester having from 1 to 10 C-atoms in the alcohol component,Which copolymers have been esterified to acid numbers of from 0 to 10 with from 22 to 50% by weight of air-drying fatty acids, based on the quantity of copolymer and drying fatty acids and dicarboxylic acid anhydride, and the hydroxyl groups thereby formed have subsequently been reacted with from 0.5 to 3% by weight of dicarboxylic acid anhydride, based on the quantity of copolymer and drying fatty acids and dicarboxylic acid anhydride, characterized in that the binders have acid numbers of from 5 to 15, these final acid numbers being made up of the acid numbers of from 0 to 10 obtained by the esterification with drying fatty acids and the acid numbers of from 1 to 15 obtained from the reaction with the dicarboxylic acid anhydride.
    Type: Grant
    Filed: February 9, 1978
    Date of Patent: March 27, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Dhein, Lothar Fleiter
  • Patent number: 4129537
    Abstract: An air-drying lacquer binder comprising a copolymer of copolymerized units of20 to 55% by weight of styrene,5 to 30% by weight of glycidyl(meth)acrylate, and0 to 50% by weight of at least one (meth)acrylic acid ester with 1 to 10 carbon atoms in the alcohol component,Which has been esterified with0 to 15% by weight of at least one natural, drying fatty acid, and10 to 50% by weight of isomerized drying fatty acids(the sum of the percentage contents amounting to 22 - 50 percent by weight) based on the copolymer and drying fatty acids and dicarboxylic acid anhydride subsequently used, up to an acid number of <10, from 30 to 75% by wt. of the isomerised drying fatty acids containing conjugated double bonds, and wherein the hydroxyl groups formed have, subsequently, been reacted with from 0.5 to 3% by weight, based on the total components of the binder, of tetrahydrophthalic acid anhydride and/or at least one isomer thereof.
    Type: Grant
    Filed: October 14, 1977
    Date of Patent: December 12, 1978
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Dhein, Lothar Fleiter
  • Patent number: 4128532
    Abstract: The instant invention is broadly directed to novel polyether esters and the use thereof in manufacturing polyurethane resins. The novel products are produced by esterifying an alkoxylated, halogenated bisphenol, a polycarboxylic acid and a dihydric alcohol.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: December 5, 1978
    Assignee: Bayer Aktiengesellschaft
    Inventors: Erich Eimers, Rolf Dhein, Rolf Wiedermann
  • Patent number: 4112012
    Abstract: Object of the invention are pulverulent coating compositions which are obtained if the coating compositions contain as crosslinking agents polyglycidyl esters of polycarboxylic acids and as binders polyesters from polyalcohols and predominantly aromatic polycarboxylic acids which contain free carboxyl groups.
    Type: Grant
    Filed: May 27, 1977
    Date of Patent: September 5, 1978
    Assignee: Bayer Aktiengesellschaft
    Inventors: Eckhard de Cleur, Rolf Dhein, Hans Rudolph, Hans Joachim Kreuder
  • Patent number: 4100223
    Abstract: A moulding composition consisting of:From 60 to 93 parts, by weight, of a polyamide;From 6 to 30 parts, by weight, of a polyethylene; andFrom 1 to 20 parts, by weight, of a copolymer of an aromatic vinyl compound, an .alpha., .beta.-unsaturated mono- and/or di-carboxylic acid or an anhydride thereof, free acid groups optionally being neutralized by a mono- and/or poly-amine or with ammonia, and an ester of the said mono- and or di-carboxylic acid.
    Type: Grant
    Filed: March 15, 1977
    Date of Patent: July 11, 1978
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf-Volker Meyer, Rolf Dhein
  • Patent number: 4073769
    Abstract: Phosphites of the general formula: ##STR1## in which N.sub.1 IS AN INTEGER;n.sub.2 is 0 or an integer;n.sub.3 is an integer;At least one of the groups R is an oxetane group as hereinafter defined or a hydrocarbon radical being substituted at least by one oxetane group as hereinafter defined;The remaining groups R are selected from alkyl, aralkyl, cycloalkyl, aryl and hetaryl groups; andThe group or groups Ar are the same or different at-least-divalent aromatic groups the free valencies of which are directly linked to the aromatic nuclei;And a process for their preparation.
    Type: Grant
    Filed: November 25, 1975
    Date of Patent: February 14, 1978
    Assignee: Bayer Aktiengesellschaft
    Inventors: Erich Eimers, Dieter Margotte, Helmut Schmid, Rolf Dhein