Patents Represented by Attorney William J. Farrington

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  • Styrenic tetrapolymer
    Patent number: 4298716
    Abstract: A tetrapolymer of .alpha.-methylstyrene, styrene, maleic anhydride and acrylonitrile is prepared by mass/suspension batch process without the need for staged late addition of monomers. The tetrapolymer is useful as a replacement for SAN as diluent in the preparation of ABS-type polymers.
    Type: Grant
    Filed: April 3, 1980
    Date of Patent: November 3, 1981
    Assignee: Monsanto Company
    Inventor: Daniel L. Dufour
  • Falling strand devolatilizer
    Patent number: 4294652
    Abstract: The present invention relates to an improved falling strand devolatilizer apparatus having a plurality of stages for devolatilization providing polymers with lower residual monomer and/or volatile contents. The novel apparatus utilizes a final flash tank having two flash compartments that share a common heating and vacuum system wherein a recycle line transfers polymer melt from the first compartment to the second compartment for additional devolatilization.
    Type: Grant
    Filed: June 30, 1980
    Date of Patent: October 13, 1981
    Assignee: Monsanto Company
    Inventor: Randolph E. Newman
  • Hemiacetals of adducts of acrolein and isocyanuric acid
    Patent number: 4293693
    Abstract: Hemiacetals are prepared by reacting monohydric primary and secondary alcohols with adducts of acrolein and isocyanuric acid. The hemiacetals are useful polymerizing or crosslinking agents for polyfunctional compounds containing hemiacetal-reactive groups such as amines, amides, alcohols, thiols and oxiranes.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: October 6, 1981
    Assignee: Monsanto Company
    Inventors: Saul M. Cohen, John R. LeBlanc
  • Unsaturated melamine condensates
    Patent number: 4293461
    Abstract: An unsaturated condensate of a methylolmelamine, an acrylamide, an unsaturated fatty acid amide and optionally a C.sub.1 to C.sub.10 alcohol, wherein the methylolmelamine has at least about 5 methylol groups per melamine ring, wherein substantially all the methylol groups are condensed with acrylamide, unsaturated fatty acid amide or alcohol, wherein the number of acrylamide moieties of the condensate is in the range of about 1 to about 4 per melamine ring and the number of unsaturated fatty acid amide moieties is in the range of about 0.5 to about 2 per melamine ring and wherein the ratio of acrylamide moieties to unsaturated fatty acid amide moieties is in the range of about 1:1 to about 3:1. The unsaturated condensates are used in high solids unsaturated coating systems containing unsaturated oil-modified resins.
    Type: Grant
    Filed: June 9, 1980
    Date of Patent: October 6, 1981
    Assignee: Monsanto Company
    Inventors: William F. Strazik, John R. LeBlanc, J. Owen Santer
  • Glass fiber bonding resins
    Patent number: 4289664
    Abstract: A glass fiber bonding composition suitable for the production of insulation materials comprises a novolac, polyunsaturated fatty acid, and a polyoxyethylene adduct.
    Type: Grant
    Filed: April 14, 1980
    Date of Patent: September 15, 1981
    Assignee: Monsanto Company
    Inventors: I. Luis Gomez, Robert Cole
  • Oxidative polymerization of monomers having at least two activated unsaturations
    Patent number: 4289864
    Abstract: A process is described that results in the production of a hydrophilic air-drying polymer system suitable for increasing the inter-fiber bonding in a fibrous substrate material. The process comprises passing air through a monomer maintained at a temperature below about 30.degree. C., said monomer having at least two activated unsaturations, until a desired viscosity increase has been achieved.
    Type: Grant
    Filed: May 19, 1980
    Date of Patent: September 15, 1981
    Assignee: Monsanto Company
    Inventor: Donald N. Van Eenam
  • Electrographic recording material, method of making and using
    Patent number: 4285989
    Abstract: An electrographic recording material comprising a conductive paper support coated with an electrically insulating layer comprising an intimate blend of a polymeric binder and up to 500 parts of an inert finely divided pigment per 100 parts by weight of polymeric binder. The binder comprises poly(vinyl acetal) and an alkoxymethyl polyaminotriazine. The electrographic recording material exhibits improved resistance to curl when it is exposed to variable humidity conditions.
    Type: Grant
    Filed: May 11, 1979
    Date of Patent: August 25, 1981
    Assignee: Monsanto Company
    Inventors: Walter J. Wilkinson, Irving Serlin
  • Process for dewatering a grafted rubber latex
    Patent number: 4284737
    Abstract: The invention relates to a process for dewatering an aqueous latex containing rubber particles grafted with alkenyl aromatic and alkenyl nitrile monomers and emulsified with an anionic surfactant wherein alkenyl aromatic and alkenyl nitrile monomers are dispersed in said latex along with a cationic surfactant in an amount sufficient to deemulsify said grafted rubber particles. The grafted rubber particles are extracted from the aqueous phase into the monomer phase as a liquid oil phase, with the aid of the cationic surfactant, said aqueous phase forming a separate water phase essentially free of said oil phase followed by separating said water phase from said liquid oil phase.
    Type: Grant
    Filed: November 5, 1979
    Date of Patent: August 18, 1981
    Assignee: Monsanto Company
    Inventors: Robert L. Kruse, Wan C. Wu
  • Expansion deformable extrusion die blade
    Patent number: 4281980
    Abstract: A flexible lip die blade is provided in which local flexing of the blade is brought about by activation of heaters located in connector members connecting the flexible lip with the body of the die blade.
    Type: Grant
    Filed: January 18, 1980
    Date of Patent: August 4, 1981
    Assignee: Monsanto Company
    Inventors: John C. Hoagland, Peter H. Farmer, Rocco M. Carabetta, Jr.
  • Polyarylene ester compositions
    Patent number: 4281079
    Abstract: Polyarylene ester compositions comprising an intimate admixture of polyarylene ester and up to about 10 weight percent of an elastomeric ethylene 1-alkene copolymer. The compositions possess greatly improved impact resistance and reduced notch sensitivity in comparison with the polyarylene ester and exhibit improved melt flow with minimal loss in flame retardance, heat distortion resistance and tensile properties. The compositions are useful as molding powders and sheet extrusion compounds.
    Type: Grant
    Filed: December 11, 1978
    Date of Patent: July 28, 1981
    Assignee: Monsanto Company
    Inventor: Massimo Baer
  • High solids air-drying coating compositions
    Patent number: 4280938
    Abstract: Air drying compositions comprising an unsaturated oil modified resin and an unsaturated condensate of an alkoxy-methylmelamine, an allylic alcohol and an acrylamide. The unsaturated melamine condensate contains allylic and acrylamide moieties in the ratio of about 3:1 to about 1:3, at least about 0.75 allylic moieties and no more than about 3 acrylamide moieties per melamine ring and a total of allylic and acrylamide moieties in the range of about 2 to about 4 per melamine ring.
    Type: Grant
    Filed: December 19, 1979
    Date of Patent: July 28, 1981
    Assignee: Monsanto Company
    Inventors: William F. Strazik, John R. LeBlanc, J. Owen Santer
  • Unsaturated melamine condensates
    Patent number: 4281091
    Abstract: An unsaturated condensate of an alkoxymethylmelamine, an allylic alcohol and an acrylamide wherein the alkoxymethyl group contains from 1 to 4 carbon atoms, wherein the ratio of allylic moieties to acrylamide moieties is in the range of about 3:1 to about 1:3, wherein there is at least about 0.75 allylic moieties and no more than about 3 acrylamide moieties per melamine ring and wherein the total of allylic moieties and acrylamide moieties is in the range of about 2 to about 4 per melamine ring. The unsaturated condensates are used in high solids unsaturated coating systems containing unsaturated oil-modified resins.
    Type: Grant
    Filed: December 19, 1979
    Date of Patent: July 28, 1981
    Assignee: Monsanto Company
    Inventors: William F. Strazik, John R. LeBlanc, J. Owen Santer
  • Allyl alcohol polymers
    Patent number: 4278782
    Abstract: Terpolymers of a monovinyl aromatic monomer such as styrene, a C.sub.3 -C.sub.7 allylic alcohol such as allyl alcohol and an ester of a C.sub.3 -C.sub.7 allylic alcohol and a C.sub.7 -C.sub.12 monovalent aromatic acid, wherein the terpolymer preferably contains an average of from about 2 to 4 allylic alcohol units and at least one allylic ester per molecule. The terpolymers are used in surface coatings in blends with acrylic resins and nitrocelluloses. Blends of the terpolymers with polyols and polyisocyanates yield polyurethanes.
    Type: Grant
    Filed: November 1, 1979
    Date of Patent: July 14, 1981
    Assignee: Monsanto Company
    Inventors: John F. Heaps, Donald M. Gardner
  • Protection of anhydride copolymers
    Patent number: 4277541
    Abstract: Polymers of unsaturated acid anhydrides such as styrene/maleic anhydride copolymers can be protected from hydrocarbon attack by application of a coating of a polymer comprising pendant hydroxyl groups such as polyvinyl alcohol.
    Type: Grant
    Filed: October 1, 1979
    Date of Patent: July 7, 1981
    Assignee: Monsanto Company
    Inventor: Vincent A. Aliberti
  • Filter assembly
    Patent number: 4277338
    Abstract: A filter assembly for extruded polymer melts is described which comprises a filter having retained between inlet and outlet manifolds with a contact pressure that can be varied. A primary seal device between the manifold and the housing is located in a rabbet in either the housing or the manifold at the contact plane. This seal responds to pressure from the polymer melt flow by deforming and increasing the contact pressure between the manifold and the housing. Thus the greater the pressure at which the melt is extruded, the tighter is the seal.
    Type: Grant
    Filed: December 6, 1979
    Date of Patent: July 7, 1981
    Assignee: Monsanto Company
    Inventor: John C. Hoagland
  • Process for preparing ABS polyblends
    Patent number: 4277574
    Abstract: The present invention relates to a process for preparing ABS polyblends having an alkenyl aromaticalkenyl nitrile monomer matrix polymeric phase reinforced with rubber particles grafted with said monomers and having a bimodal rubber particle size distribution, the process comprising: charging continuously a formulation of said monomers having a soluble diene dissolved therein and a first grafted diene rubber particle dispersed therein to a back-mixed reaction zone operating at 50-80% steady state, flow-through, conversion of said monomer formulation, continuously mass polymerizing said charged monomer formulation to 50-80% conversion, forming and dispersing said soluble rubber as second grafted diene particles having a particle size larger than said first grafted rubber particles, continuously withdrawing an effluent from said reaction zone and separating said ABS polyblend from said effluent.
    Type: Grant
    Filed: November 19, 1979
    Date of Patent: July 7, 1981
    Assignee: Monsanto Company
    Inventors: Michael B. Jastrzebski, Allen R. Padwa
  • Purification of wet strength resins
    Patent number: 4269951
    Abstract: Certain wet strength resins based on the epichlorohydrin/polyamine reaction which are characterized by extremely long gel times can be purified from epichlorohydrin residuals by azeotropic distillation.
    Type: Grant
    Filed: May 19, 1980
    Date of Patent: May 26, 1981
    Assignee: Monsanto Company
    Inventor: Donald N. Van Eenam
  • Urethane compositions prepared from allyl alcohol polymers
    Patent number: 4262099
    Abstract: Urethane compositions prepared from terpolymers of a monovinyl aromatic monomer such as styrene, a C.sub.3 -C.sub.7 allylic alcohol and an ester of a C.sub.3 -C.sub.7 allylic alcohol and a C.sub.7 -C.sub.12 monovalent aromatic acid, wherein the terpolymer preferably contains an average of from about 2 to 4 allylic alcohol units and at least one allylic ester unit per molecule.The compositions are useful as surface coatings, foundry resin binders, molding and encapsulating compounds and in the preparation of rigid and semi-rigid urethane foams.
    Type: Grant
    Filed: November 1, 1979
    Date of Patent: April 14, 1981
    Assignee: Monsanto Company
    Inventors: John F. Heaps, Donald M. Gardner
  • Rubber-modified terpolymer with improved molding characteristics
    Patent number: 4262096
    Abstract: Rubber-modified terpolymers of from 50 to 83% of a monoalkenyl aromatic monomer, from 15 to 30% of an unsaturated dicarboxylic acid anhydride, from 2 to 20% of an unsaturated nitrile are described which are useful as molding compositions.
    Type: Grant
    Filed: June 18, 1979
    Date of Patent: April 14, 1981
    Assignee: Monsanto Company
    Inventors: Yoon C. Lee, Quirino A. Trementozzi
  • Electrographic recording material
    Patent number: 4259425
    Abstract: An electrographic recording material comprising a conductive sheet support coated with an electrically insulating layer comprising an intimate blend of a polymeric binder and up to 500 parts of an inert finely divided pigment per 100 parts by weight of polymeric binder. The binder comprises from about 40 to about 90 parts by weight of a poly(vinyl acetal) and from about 10 to about 60 parts by weight of a polystyrene or a poly(.alpha.-methylstyrene). The electrographic recording material exhibits improved toner adhesion.
    Type: Grant
    Filed: May 11, 1979
    Date of Patent: March 31, 1981
    Assignee: Monsanto Company
    Inventor: Irving Serlin