Patents Represented by Attorney Gene Harsh
  • Patent number: 4921842
    Abstract: The present invention relates to a process for the continuous production of aqueous polyurethane dispersions, i.e. dispersions or suspensions both of pure polyurethanes and of polyurethane ureas, by mixing a product, which has been obtained by reaction of polyisocyanates with compounds having a molecular weight of 400 to about 10,000 and containing at least two isocyanate-reactive groups, with water, characterized in that the mixing of the polyisocyanate reaction product with water is carried out in a co-current reactor, one of the components to be mixed or a mixture containing one of the two components to be mixed being compressed to an initilal pressure of from about 20 to 500 bar and expanded through a coaxially arranged nozzle into the short residence time mixing tube where it is mixed with the other component or with a mixture containing the other component.
    Type: Grant
    Filed: August 9, 1988
    Date of Patent: May 1, 1990
    Assignee: Bayer Aktiengessellschaft
    Inventors: Wolfgang Henning, Harald Petersen, Gerhard Moormann
  • Patent number: 4915509
    Abstract: The present invention is directed to a mixer for mixing at least two free-flowing, reactive or unreactive substances comprising(a) a casing having at least two inlets and at least one outlet,(b) a rotatable shaft extending through the casing,(c) at least one rotor disc attached to the shaft such that the rotor disc is perpendicular to the shaft,(d) at least one stator disc attached to the casing such that the stator disc is parallel to the rotor disc and has an opening such that shaft can pass through the stator disc,(e) optionally at least one running wheel attached to the shaft and containing openings such that when the shaft is rotating, the running wheel provides a pumping effect to the mixture passing through the mixer,(f) at least one inlet through the casing for introducing a first substance axially to the shaft and against the rotor disc and(g) at least one inlet for introducing a second substance against a rotor disc at a point which is radially outward from the introduction of the first substance.
    Type: Grant
    Filed: May 5, 1988
    Date of Patent: April 10, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heinz Sauer, Hermann Dallmeyer, Uwe J. Zarnack, Berthold Keggenhoff, Bernd Weber
  • Patent number: 4883909
    Abstract: The present invention is directed to liquid, modified isocyanates prepared by reacting 4,4'-diphenylmethane diisocyanate, specific amines, and tripropylene glycol. The invention is also directed to processes for the production thereof.
    Type: Grant
    Filed: May 11, 1988
    Date of Patent: November 28, 1989
    Assignee: Mobay Corporation
    Inventor: William E. Slack
  • Patent number: 4882361
    Abstract: The present invention is directed to a process for the production of compact or cellular, elastomeric moldings having a compact skin based on polyurethane urea elastomers prepared from(a) organic polyisocyanates,(b) relatively high molecular weight polyhydroxyl or polyamino compounds containing at least two reactive hydrogen atoms,(c) diaminodiphenyl ureas as chain-extending agents and optionally,(d) catalysts,(e) small quantities of ethylene glycol,(f) other chain-extending agents and/or cross-linking agents,(g) blowing agents and(h) auxiliaries and/or additives, which is characterized in that the chain-extending agents (c) are diaminodiphenyl ureas corresponding to formula I ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 may be the same or different and represent hydrogen or a C.sub.1 -C.sub.6 alkyl radical and wherein the NH.sub.2 groups are in the m- and/or p-position to the urea group.The present invention is also directed to the RIM elastomers produced by this process.
    Type: Grant
    Filed: September 16, 1988
    Date of Patent: November 21, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Andreas Ruckes, Gerhard Grogler, Richard Kopp
  • Patent number: 4882411
    Abstract: The present invention relates to a process for the production of polyurethane urea elastomers from(a) NCO-terminated prepolymers based on polyisocyanates and polyethers having a molecular weight of 400 to about 10,000 and an ethylene oxide content of about 10 to 60 mole-% and(b) solid diaminodiphenyl ureas corresponding to the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be the same or different and represent hydrogen or C.sub.1 -C.sub.6 alkyl radicals and wherein the amino groups are in the m-and/or p-position to the urea group,characterized in that the NCO prepolymers are reacted with the diaminodiphenyl ureas in powder-form in a heterogeneous phase at temperatures of about 5.degree. to 40.degree. C.The present invention is also directed to the polyurethane urea elastomers prepared by this process.
    Type: Grant
    Filed: September 16, 1988
    Date of Patent: November 21, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerhard Grogler, Andreas Ruckes, Heinrich Hess, Richard Kopp
  • Patent number: 4882409
    Abstract: The present invention is directed to a process for the production of a polyurethane urea elastomer which comprises preparing a heterogeneous mixture of(a) a diaminodiphenylurea corresponding to the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, represent hydrogen or a C.sub.1 -C.sub.6 alkyl radical and wherein the amino groups are in the meta and/or para position to the urea group and(b) polyisocyanates and NH.sub.2 -or OH-groups containing compounds or a NCO-terminated prepolymer prepared from a polyisocyanate and a polyhydroxyl compound having a molecular weight of 400 to about 10,000, and subsequently reacting the heterogeneous system to form a polyurethane urea elastomer by heating the mixture to a temperature below the melting point of said diaminodiphenylurea.The present invention is also directed to heterogeneous reaction mixtures based on the above diaminodiphenylureas suspended in the above NCO-terminated prepolymers.
    Type: Grant
    Filed: September 16, 1988
    Date of Patent: November 21, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerhard Grogler, Andreas Ruckes, Heinrich Hess
  • Patent number: 4882363
    Abstract: The present invention relates to a process for the production of fluorocarbon-free, rigid polyurethane foam moldings having a gross density of at least 300 kg/m.sup.3 by in-mold foaming of a reaction mixture based on(a) a polyisocyanate component containing at least one aromatic polyisocyanate,(b) a polyhydroxyl component,(c) blowing agents,(d) catalysts and(e) zeolitic adsorbents,at an isocyanate index of about 75 to 150, characterized in that(b) an organic polyhydroxyl compound or a mixture of organic polyhydroxyl compounds having an (average) hydroxyl functionality of at least 2.2 and an (average) OH number of at least 300 mg KOH/g is used as the polyhydroxyl component,(c) water and/or carbon dioxide is/are used as the blowing agent and(e) the zeolitic adsorbents have a pore diameter of at least 0.7 nm.
    Type: Grant
    Filed: December 6, 1988
    Date of Patent: November 21, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Alfred Neuhaus, Otto Ganster, Manfred Mengal
  • Patent number: 4880463
    Abstract: A glass frit composition having the theoretical oxide values (in weight %) of 0.5-9 Li.sub.2 O, 29-38 Na.sub.2 O, 0-25 CaO, 5-10 B.sub.2 O.sub.3 and 38-50 of SiO.sub.2 is characterized in that it is virtually fluorine-free and was found to be eminently suitable in its molten form as a lubricant in the continuous casting of steel. The invention is thus related to a lithium containing fluorine-free frit composition and in a second aspect to an improvement in the process for the continuous casting of steel, the improvement comprising using as a lubricant the glass frit composition referred to above.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: November 14, 1989
    Assignee: Mobay Corporation
    Inventor: Elie E. Saad
  • Patent number: 4880864
    Abstract: It has now been found that the flame retardance of polydiorganosiloxane copolycarbonates may be significantly improved upon the addition thereto of a small amount of a metal salt of an inorganic acid. The polydiorganosiloxane copolycarbonates are conforming structurally to ##STR1## wherein p is an integer of from 1 to about 10,n is an integer of from 1 to about 1000,m is an integer of from 1 to about 500,A is a derivative of an aromatic dihydroxy compound,R and R' independently denote a C.sub.1 -C.sub.20 alkyl radical or a C.sub.6 -C.sub.14 aryl radical,which copolymer is characterized in that its relative viscosity measured on a solution of 0.5 g in 100 ml of dichloromethane at 25.degree. C. is at least 1.15.
    Type: Grant
    Filed: December 29, 1987
    Date of Patent: November 14, 1989
    Assignee: Mobay Corporation
    Inventors: Winfried G. Paul, Ronald L. Price, Sivaram Krishnan
  • Patent number: 4879322
    Abstract: The present invention is directed to a continuous process for the production of aqueous polyurethane-urea dispersions by(a) mixing an emulsifiable isocyanate-terminated prepolymer with an aqueous medium in a low shear, stator-rotor dynamic mixer operating at a speed of about 500 to 8000 rpm utilizing a mixing wattage of about 0.3 to 10.0 watts/cubic centimeter and a mixing volume of at least about 0.1 liters, the average residence time of the aqueous medium and the prepolymer being about 1 to 30 seconds and the overall flow rate through the dynamic mixer being at least about 50 kg/h and(b) reacting the dispersed isocyanate-terminated prepolymer prepared in (a) with a polyamine chain extender to form an aqueous polyurethane-urea dispersion.
    Type: Grant
    Filed: May 2, 1988
    Date of Patent: November 7, 1989
    Assignee: Mobay Corporation
    Inventors: Peter H. Markusch, Arthur W. Mason, Wolfgang D. Wenzel
  • Patent number: 4879408
    Abstract: Diisocyanates and isomer mixtures of diisocyanates corresponding to the formula ##STR1## in which R.sup.1, R.sup.2, m and n are as defined herein are produced by phosgenating diamines and isomer mixtures of diamines corresponding to the formula ##STR2## in which R.sup.1, R.sup.2, m and n are as defined herein. These diisocyanates which are liquid at room temperature and highly compatible with polyols are particularly useful in the production of polyurethanes.
    Type: Grant
    Filed: April 7, 1987
    Date of Patent: November 7, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hartmut Knofel, Michael Brockelt, Stefan Penninger, Herbert Stutz
  • Patent number: 4879409
    Abstract: A diisocyanate corresponding to the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3, m and n are as defined herein is prepared by phosgenating a diamine corresponding to the formula ##STR2## in which R.sup.1, R.sup.2, R.sup.3, m and n are as defined herein. The diisocyanate may contain C.sub.1 -C.sub.12 -monoalkyl-substituted methylene-bis-(cyclohexylisocyanate)isomers in an amount of up to 40 wt. %. These new diisocyanates which are liquid at room temperature and compatible with polyols are particularly useful in the production of polyurethanes.
    Type: Grant
    Filed: April 7, 1987
    Date of Patent: November 7, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hartmut Knofel, Michael Brockelt, Stefan Penninger, Herbert Stutz
  • Patent number: 4876302
    Abstract: The present invention is directed to aqueous coating compositions suitable for use as coating and finishing agents for surface coatings, preferably PVC or polyurethane coatings, based on sedimentation-stable polyurethane dispersions having a solids content of about 10-70% by weight wherein the polyurethane-urea solids material is based on polyester diols, low molecular weight diols and optionally triols, chemically incorporated hydrophilic groups, specific mixtures of diisocyanates and polyamine chain extenders having an average functionality of greater than 2 and wherein the aqueous preparations additionally contain alkoxylated dimethyl-polysiloxanes and water-soluble polyethylene oxides. The present invention is also directed to a process for applying top coats and finishes to surface coatings, preferably PVC or polyurethane surface coatings, wherein the above-described aqueous coating and finishing agents are used as the top coat and the coatings are cured at about 70.degree.-170.degree. C.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: October 24, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus Noll, Wilhelm Thoma, Klaus Nachtkamp, Walter Schroer, Josef Pedain
  • Patent number: 4875843
    Abstract: The invention relates to a vacuum mold for manufacturing cushions with back-foamed covers, wherein a section of cover material is stretched across a mold cavity, held down at the rim of the cavity, but allowed to slide into the mold cavity under the influence of a vacuum. The cover is also placed against and fitted to contourings (ridges and/or grooves) of the mold cavity, and subsequently back-foamed. The resulting flexible foam core is allowed to harden and the finished cushion is removed from the form.
    Type: Grant
    Filed: September 13, 1988
    Date of Patent: October 24, 1989
    Assignees: Fritsche-Mollmann GmbH & Co., Bayer Aktiengesellschaft
    Inventors: Volker Onnenberg, Gunter Mollmann
  • Patent number: 4876033
    Abstract: This invention relates to carbon-containing moulded bodies based on thermoplastic polycarbonates and thermoplastic polyalkylene terephtalates with an addition of carbon black and graphite and to a process for the production of these moulded bodies.
    Type: Grant
    Filed: April 25, 1988
    Date of Patent: October 24, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heinz-Jurgen Dziurla, Dieter Freitag, Werner Waldenrath, Claus Burkhardt, Bernhard Schulte
  • Patent number: 4876292
    Abstract: The present invention is directed to a reactive mixture for use in preparing a flexible polyurethane foam and to the foams produced therefrom. The reactive mixture broadly comprises(A) from more than 0 up to 3 parts by weight per 100 parts by weight of components (B) and (C) of an amine of the formula:H.sub.2 N--R--NH.sub.2where R is a C.sub.4 to C.sub.10 straight or branched alkylene group, or a C.sub.4 to C.sub.15 alicyclic group,(B) from 0 to 30% by weight of a polyoxyalkylene polyamine having a molecular weight of from about 400 to about 5000 and containing from 2 to 3 primary amino groups, and(C) from 700 to 100% by weight of one or more polyether polyhydroxyl compounds having hydroxyl functionalities from about 2 to 3 and molecular weights of from about 1000 to about 10,000, the percents of components (B) and (C) totalling 100%.
    Type: Grant
    Filed: October 6, 1988
    Date of Patent: October 24, 1989
    Assignee: Mobay Corporation
    Inventor: Charles M. Milliren
  • Patent number: 4874816
    Abstract: The invention relates to a process for the production of vinyl copolymers with grafted-on polycarbonate chains, to the grafted vinyl copolymers obtainable by the process according to the invention, to their use as modifiers for mixtures of thermoplastic polycarbonates and thermoplastic polystyrenes, to such mixtures themselves and to the use of such mixtures as substrates for optical discs.
    Type: Grant
    Filed: May 13, 1988
    Date of Patent: October 17, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ralf Dujardin, Wolfgang Ebert, Rolf-Volker Meyer, Klaus Berg, Ulrich Grigo, Wolfgang Wehnert
  • Patent number: 4874797
    Abstract: The present invention is directed to novel polyhydroxyalkyl oligoureas prepared by condensing urea derivatives with polyamides. The present invention is further directed to polyether polyols prepared by alkoxylating these polyhydroxyalkyl oligoureas. Finally, the present invention is directed to the use of both the polyhydroxyalkyl oligoureas and the polyethers prepared therefrom for use in the production of polyurethanes, particularly rigid foams.
    Type: Grant
    Filed: October 1, 1986
    Date of Patent: October 17, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Haas, Claus-Dieter Sommerfeld, Hans-Ulrich Weber
  • Patent number: 4874802
    Abstract: The invention relates to thermoplastic polycarbonate molding compositions comprising a polycarbonate resin and a stabilizing agent conforming to ##STR1## where R.sub.1 and R.sub.2 independently are ##STR2## R.sub.3 is a hydrogen atom, a branched or linear C.sub.1 -C.sub.20 alkyl or a C.sub.1 -C.sub.20 cycloalkyl, and R.sub.5 and R.sub.6 independently are a hydrogen atom or a C.sub.1 -C.sub.3 alkyl, x is an integer of about 1 to 70,y is an integer of about 0 to 70,R.sub.4 is C.sub.2 -C.sub.6 alkyl or cycloalkyl, C.sub.6 -C.sub.10 aryl or C.sub.7 -C.sub.20 alkylaryl or cycloalkylaryl. The agent is homogenically distributed throughout the resin and is present in an amount sufficient to improve the gamma radiation resistance of the composition.
    Type: Grant
    Filed: June 16, 1988
    Date of Patent: October 17, 1989
    Assignee: Mobay Corporation
    Inventors: Charles E. Lundy, Sivaram Krishnan, Gerard E. Reinert
  • Patent number: 4873271
    Abstract: The invention relates to thermoplastic polycarbonate molding compositions which are rendered improved resistance to gamma-radiation by the incorporation therewith of about 0.05 to about 5.0 percent by weight of an ester of poly(alkylene)oxide conforming to ##STR1## wherein R is a C.sub.1 -C.sub.20 alkyl, aryl or alkylaryl, Y denotes a hydrogen atom or a C.sub.1 -C.sub.6 alkyl radical, and X is about 1 to 40, preferably 5 to 30.The compositions of the invention exhibit excellent resistance to yellowness and formation of haze which commonly characterize gamma irradiated articles molded from polycarbonate.
    Type: Grant
    Filed: April 25, 1989
    Date of Patent: October 10, 1989
    Assignee: Mobay Corporation
    Inventors: Charles E. Lundy, Sivaram Krishnan