Patents by Inventor Fritz E. Kempter

Fritz E. Kempter 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: 5576386
    Abstract: A process for the continuous polymerization of vinyl monomers to form vinyl polymers having a molecular weight M.sub.n of from 1000 to 20,000 comprisesa. carrying out the polymerization within an annular gap from 0.5 to 10 mm in width,b. confining the annular gap on the inner surface with a rotor, andc. carrying out the polymerization at from 110.degree. to 270.degree. C.
    Type: Grant
    Filed: January 28, 1993
    Date of Patent: November 19, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Manfred Niessner, Ralph Diener, Heino Thiele, Wolfram Weiss, Hans Renz
  • Patent number: 5527859
    Abstract: Copolymers crosslinkable by a free radical method are prepared by polymer-analogous reaction ofA) a copolymer (A) which is composed ofa1) from 20 to 85 mol % of a monomer (a1) having the structural element of methacrylic acid anda2) from 15 to 80 mol % of another monomer (a2) which undergoes free radical polymerization,a3) from 5 to 50 mol % of the total amount of the monomers (a1) and (a2) being monomers (a3) which carry functional groups and whose functional groups are capable of undergoing a condensation or addition reaction,withB) an olefinically unsaturated monomer (B) which carries a functional group which is complementary to that of the monomers (a3),by a process in which the polymer-analogous reaction is carried out at from 90.degree. to 150.degree. C. in an average residence time of from 3 to 20 minutes in highly concentrated solution or in the absence of a solvent. Said copolymers are used as binders for powder coatings.
    Type: Grant
    Filed: August 2, 1995
    Date of Patent: June 18, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Wolfgang Reich, Jurgen Hofmann
  • Patent number: 5484850
    Abstract: Copolymers crosslinkable by a free radical method and having a number average molecular weight of from 1500 to 6000 and a molecular weight distribution corresponding to a polydispersity of from 1 to 4.0 are obtainable by polymer-analogous reaction ofA) a copolymer (A) which is composed ofa1) from 50 to 85 mol % of a monomer (a1) containing the structural element of methacrylic acid anda2) from 15 to 50 mol % of another monomer (a2) undergoing free radical polymerization,a3) from 5 to 50 mol % of the total amount of the monomers (a1) and (a2) being monomers (a3) which carry functional groups and whose functional groups are capable of undergoing a condensation or addition reaction,and is obtainable by free radical mass or solution polymerization at from 140.degree. to 210.degree. C. and with an average residence time of from 2 to 90 minuteswithB) an olefinically unsaturated monomer (B) which carries a functional group which is complementary to the functional groups of the monomers (a3).
    Type: Grant
    Filed: October 28, 1994
    Date of Patent: January 16, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Wolfgang Reich, Ulrich Jager, Eckhard Korona
  • Patent number: 5017641
    Abstract: Aqueous nonwoven binders that give reduced formaldehyde emission on curing are based on condensation products of urea or derivatives thereof, formaldehyde and glyoxal in a molar ratio, based on the solid binder, of from 1.5 to 2.5 moles of formaldehyde and from 0.1 to 0.5 mole of glyoxal per mole of the total urea used.
    Type: Grant
    Filed: May 2, 1989
    Date of Patent: May 21, 1991
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Franz Matejcek, Werner Neubach, Klaus Flory
  • Patent number: 4868227
    Abstract: Webs composed of inorganic or organic fiber material are bonded with a cured resin mixture consisting essentially of(A) from 5 to 80% by weight of a water-soluble condensation product of carbonyl number 0-200 which has been prepared by alkaline condensation from 0.1 to 0.4 mole of an aliphatic or cycloaliphatic condensable ketone and 1 mole of formaldehyde, and(B) from 20 to 95% by weight of a water-soluble amino and/or phenolic resin.
    Type: Grant
    Filed: February 22, 1988
    Date of Patent: September 19, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Franz Matejcek, Werner Neubach, Gerd Busse
  • Patent number: 4831106
    Abstract: A low-formaldehyde binder consists essentially of(A) from 5 to 80% by weight of a water-soluble condensation product of carbonyl number 0-200 which has been prepared by alkaline condensation from 0.1 to 0.4 mole of an aliphatic or cycloaliphatic condensable ketone and 1 mole of formaldehyde, and(B) from 20 to 95% by weight of 4,5-dihydroxyimidazolidin-2-one and/or an unetherified, partially etherified or completely etherified condensation product thereof with an aliphatic monoaldehyde or dialdehyde.
    Type: Grant
    Filed: February 22, 1988
    Date of Patent: May 16, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Franz Matejcek, Werner Neubach, Gerd Busse
  • Patent number: 4777194
    Abstract: A heat-curable aqueous coating agent contains, as a binder, a mixture or precondensate of(A) a resin possessing basic nitrogen groups and(B) a phenol resin based on a resol ether which is bonded via 0,0'-methylene ether groups and whose p-positions predominantly carry hydrogen and/or methylolalkyl ether groups.After protonation with an acid, the said coating agent is particularly useful as a binder for the cathodic electrocoating of metal articles.
    Type: Grant
    Filed: June 13, 1985
    Date of Patent: October 11, 1988
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Juergen Nieberle, Eberhard Schupp
  • Patent number: 4731430
    Abstract: Phenol resins which are modified with compounds possessing amide and/or imide groups and are based on phenol resol ethers bonded via o,o'-methylene ether groups, and a process for their preparation.The novel modified phenol resol ethers are useful for the preparation of coating systems, in particular as crosslinking agents for cathodic electrocoating binders, and for the preparation of adhesives and rubber assistants.
    Type: Grant
    Filed: July 9, 1986
    Date of Patent: March 15, 1988
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Juergen Nieberle
  • Patent number: 4724244
    Abstract: Cathodic coating agents which are rendered water-dilutable by the addition of an acid, contain binder systems possessing basic nitrogen groups and may or may not contain pigments, dyes, fillers, solvents, antioxidants, other surface coating assistants and/or additional crosslinking components, the binder system containing sulfonate and/or phosphonate groups or the esters of these groups in an amount of from 0.05 to 3% by weight, and the preparation of such products.The novel coating agents are useful for the cathodic electrocoating of electrically conductive substrates.
    Type: Grant
    Filed: April 27, 1987
    Date of Patent: February 9, 1988
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Wolfram Weiss, Rolf Osterloh, Albrecht Zosel
  • Patent number: 4675375
    Abstract: Essentially phenol-free phenol resol ethers which are bonded via o,o'-methylene ether groups are prepared by a process in whichA. where the process is carried out beginning with the methylolation in an aqueous medium, the methylolation is carried out in the presence of 0.5-10% by weight, based on the phenol employed, of Me.sup.++ ions, the latter are then removed as a sparingly soluble salt, the water present as a solvent in the reaction mixture is removed at 30.degree.-80.degree. C. in the presence or absence of one or more monohydric, dihydric or trihydric alcohols and an entraining agent, and the water of reaction formed during the etherification is separated off at 45.degree.-120.degree. C., andB. where the process is carried out beginning with the methylolation in a non-polar organic solvent, the methylolation is carried out in the presence of 0.1-0.3% by weight, based on the phenol employed, of Me.sup.++ ions, the etherification is effected at 95.degree.-120.degree. C.
    Type: Grant
    Filed: June 13, 1985
    Date of Patent: June 23, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Juergen Nieberle
  • Patent number: 4647604
    Abstract: The heat-curable coating agent according to the invention contains a combination of a binder, which possesses basic nitrogen groups and is rendered water-dilutable by protonation with an acid, and a crosslinking agent and, if required, pigments, fillers, corrosion inhibitors, surface coating assistants and catalysts, and the binder used is a reaction product of a dicarboxylic acid or of a dicarboxylate or of a (meth)acrylate oligomer or polymer with an adduct of a di- or triglycidyl ether and a polyamine, the polyamine containing 2 or more amine nitrogen atoms per molecule and one or more alkylene chains of 3 or more carbon atoms between the amino groups, and has an NH amine number of from 50 to 150 mg of KOH/g and is combined with aminoplasts and/or phenoplasts as crosslinking agents.The novel coating agent is useful as a binder for the cathodic electrocoating of metal articles.
    Type: Grant
    Filed: June 13, 1985
    Date of Patent: March 3, 1987
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Harro Petersen, Eberhard Schupp, Gunther Sabelus, Horst Schmidt
  • Patent number: 4594403
    Abstract: Amide-containing epoxy resin/amine adducts are prepared by a process in which an epoxy resin/amine adduct containing primary and/or secondary aminoalkyl groups is reacted with a carboxylic acid in the presence of esterification catalysts, particularly advantageously in the presence of an alcohol.The products prepared according to the invention are useful as binders for cathodic electrocoating.
    Type: Grant
    Filed: June 13, 1985
    Date of Patent: June 10, 1986
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Gunther Sabelus, Eberhard Schupp, Wolfram Weiss
  • Patent number: 4517343
    Abstract: A cathodic electrocoating binder comprises a mixture of(A) from 50 to 95 percent by weight of one or more polyadducts, polymers and/or polycondensates which possess basic nitrogen groups and(B) from 50 to 5 percent by weight of one or more amide-amines obtained by reacting monocarboxylic and/or dicarboxylic acids, or their esters, with diamines which possess one primary and one secondary amino group per molecule, the secondary amino group carrying a .beta.
    Type: Grant
    Filed: November 15, 1982
    Date of Patent: May 14, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Eberhard Schupp, Fritz E. Kempter
  • Patent number: 4444942
    Abstract: A bath composition for cataphoretic electrocoating of conductive surfaces contains coating agents which have been rendered soluble or dispersible with acid, contain basic nitrogen groups and carry groups of the general formulae (1) and (11) ##STR1## and, optionally, also groups of the general formulae (III) and/or (IV) ##STR2## where R.sup.1 and R.sup.2 are each alkyl, hydroxyalkyl or alkoxyalkyl, R.sup.3 and R.sup.4 are each hydrogen or methyl, R.sup.5 and R.sup.6 are each hydrogen, alkyl or a divalent radical of a polymer molecule which is bonded to a phenol or phenol ether, n.sup.1 is 1, 2 or 3 and n.sup.2 is 1 or 2, and where the oxygen bonded to the phenyl radical is either in the form of the OH group or etherified.
    Type: Grant
    Filed: June 15, 1982
    Date of Patent: April 24, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Eberhard Schupp, Gunther Sabelus
  • Patent number: 4444634
    Abstract: Polyadducts/polycondensates which can be diluted with water when protonated with an acid and which contain basic nitrogen groups are obtained by the polyaddition reaction of(A) a Mannich base obtained from(a) a monophenol and/or a polyphenol,(b) one or more dialkylamines of the formula ##STR1## where R.sup.1 and R.sup.2 are each alkyl or alkoxyalkyl, or are linked to one another to form a 5-membered or 6-membered ring, and(c) formaldehyde with(B) an epoxy resinand contain groups, which are bonded to aromatic rings, of the general formula ##STR2## and may or may not contain groups of the general formula ##STR3## where R.sup.3 and R.sup.4 are each alkyl, hydroxyalkyl or alkoxyalkyl, or are linked to one another to form a 5-membered or 6-membered ring, and R.sup.5 and R.sup.6 are each hydrogen or methyl.These products are useful as binders for the cathodic electrocoating of metallic articles.
    Type: Grant
    Filed: June 15, 1982
    Date of Patent: April 24, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Eberhard Schupp
  • Patent number: 4427514
    Abstract: Polyadducts/polycondensates which can be diluted with water when protonated with an acid and which contain basic nitrogen groups are obtained by the polyaddition reaction of(A) a Mannich base obtained from a monophenol and/or a polyphenol, one or more secondary amines which contain one or more hydroxyalkyl groups, or a mixture of a secondary amine of this type with another secondary amine, and formaldehyde with(B) one or more epoxy resins,and contain groups, which are bonded to aromatic rings, of the formula (I) ##STR1## where R.sup.1 and R.sup.2 are each alkyl of 1 to 9 carbon atoms, or hydroxyalkyl or alkoxyalkyl, each of 2 to 10 carbon atoms, or are linked to one another to form a 5-membered or 6-membered ring, and R.sup.3 and R.sup.4 are each hydrogen or methyl.These products are useful as binders for cathodic electrocoating.
    Type: Grant
    Filed: June 15, 1982
    Date of Patent: January 24, 1984
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Eberhard Schupp
  • Patent number: 4376849
    Abstract: A polyadduct/polycondensate which is water-dilutable when protonated with an acid, and which contains basic nitrogen groups, the groups being of the general formula (I) ##STR1## and/or of the general formula (II) ##STR2## as well as of the formula (III) ##STR3## where R.sup.1 and R.sup.2 are hydrogen or methyl, R.sup.3 and R.sup.4 are hydrogen, alkyl or a radical bonded to a phenol or phenolether, R.sup.5 and R.sup.6 are alkyl, hydroxyalkyl or alkoxyalkyl or are linked to one another to form a 5-membered or 6-membered ring, R.sup.7 is a polydienyl radical, n.sup.1 = from 0.5 to 3 and n.sup.2 = from 0.05 to 1.0, and its method of preparation.The polyadduct/polycondensate can be used, for example, as a surface-coating binder for the cathodic electrocoating of metal articles.
    Type: Grant
    Filed: July 9, 1981
    Date of Patent: March 15, 1983
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Eberhard Schupp
  • Patent number: 4363710
    Abstract: Polyadducts, free from epoxide groups, are obtained from ammonia and epoxide compounds by reacting 1 mole of ammonia with from 1.2 to 2.0 equivalents of epoxide, so that if diepoxide compounds are used products of the general formula (I) ##STR1## are obtained, while if triepoxides and/or tetraepoxide compounds are used, by themselves, or together with diepoxide compounds, products of the general formula II ##STR2## are produced; in these formulae, the E.sup.1 's are identical or different hydroxyl-containing divalent radicals and the E.sup.2 's are identical or different hydroxyl-containing trivalent or tetravalent radicals, resulting from the opening of the oxirane rings of epoxide compounds containing two, three or four epoxide groups in the molecule, n.sup.1, n.sup.3 and n.sup.5 are from 0 to 3, n.sup.2 and n.sup.4 are from 1 to 3 and X is 0 or 1, and one or more of the divalent radicals E.sup.1 in the general formlula (II) may or may not be replaced by polyvalent radicals E.sup.2.
    Type: Grant
    Filed: October 30, 1981
    Date of Patent: December 14, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Eberhard Schupp, Hans-Uwe Schenck, Erich Gulbins
  • Patent number: 4340455
    Abstract: A polyadduct/polycondensate, which is water-dilutable when protonated with an acid, and which contains basic nitrogen groups, is obtained by polyaddition reaction of(A) Mannich bases obtained from monophenols and/or polyphenols, one or more secondary amines which contain one or more hydroxyalkyl groups, or a mixture of such a secondary amine with another secondary amine, and formaldehyde or a formaldehyde donor, with(B) an epoxy resin, the polyadduct/polycondensate of (A) and (B) containing groups, bonded to aromatic rings, of the formula (I) ##STR1## with or without groups of the general formula II ##STR2## where R.sup.1 is a polydienyl radical, R.sup.2 and R.sup.3 are hydrogen or methyl and R.sup.4 and R.sup.5 are alkyl, hydroxyalkyl or alkoxyalkyl or are linked to one another to form a 5-membered or 6-membered ring.The polyadduct/polycondensate can be used, for example, as a surface-coating binder for the cathodic electrocoating of metal articles.
    Type: Grant
    Filed: July 9, 1981
    Date of Patent: July 20, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Fritz E. Kempter, Eberhard Schupp
  • Patent number: 4340714
    Abstract: A process for the preparation of curable polyadducts, possessing basic nitrogen groups, wherein (A) monophenols and/or polyphenols, which contain groups of the general formula (I): ##STR1## where R.sup.1 and R.sup.2 are identical or different and each is hydrogen or methyl are reacted with (B) amines having one or more primary and/or secondary amino groups, and the adduct formed is reacted with (C) epoxide compounds having from 1 to 4 epoxide groups per molecule and having a molecular weight of at most 2,500, the ratio of the phenolic hydroxyl groups of (A) to epoxide groups of (C) being from 1:0.5 to 1:2 and the amine (B) being employed in such amount that the resulting polyadduct of (A), (B) and (C) contains from 0.1 to 5% by weight of basic nitrogen, and the use of the products, after protonation with an acid, as binders for the production of coatings, especially for the cathodic electrocoating of metal articles.
    Type: Grant
    Filed: May 22, 1981
    Date of Patent: July 20, 1982
    Assignee: BASF Aktiengesellschaft
    Inventors: Eberhard Schupp, Fritz E. Kempter, Erich Gulbins