Patents Assigned to The Dow Chemical
  • Brominated hydroxyaromatic compounds
    Patent number: 4621159
    Abstract: Prepare novel ring-brominated derivatives of tetraalkyl dihydroxy diaromatic compounds, e.g. 4,4'-(1,2-ethanediyl)bis(3,5-dibromo-2,6-dimethyl-phenol).
    Type: Grant
    Filed: September 9, 1985
    Date of Patent: November 4, 1986
    Assignee: The Dow Chemical Company
    Inventor: Abel Mendoza
  • Repeating block, oligomer-free, polyphase, thermoformable polyurethanes and method of preparation thereof
    Patent number: 4621113
    Abstract: Polyphase, transparent, polyblock, oligomer-free, segmented urethane polymers having molecular weights of from about 100,000 to about 200,000 and being eminently suited for use in medical devices such as blood bags, etc., are deriveable from chain extenders, free diisocyanate molecules and prepolymers consisting essentially of linear molecules which are terminated at each end by isocyanate groups. The prepolymer molecules consist of n branched, polyether glycol residues joined through intervening carbamate groups with (n+1) diisocyanate residues, n ranging from about 1 to 4 and having an average value of less than 2. The polyether glycols have molecular weights of from about 1000 to about 6000 and are methylol-terminated chains of C.sub.3 -C.sub.6 alkylene oxide units. Importantly, the final polymers are free of domain crystallinity.
    Type: Grant
    Filed: October 7, 1985
    Date of Patent: November 4, 1986
    Assignee: The Dow Chemical Company
    Inventor: Guy R. Collins
  • Zinc-based paints employing a mixture of ether alcohols as liquid organic vehicle
    Patent number: 4620873
    Abstract: A solvent mix can be used to improve the protection offered by zinc-based paints. This method of improving zinc-based paints' protection affords an additional factor for the enhancement of coating protection.
    Type: Grant
    Filed: September 23, 1985
    Date of Patent: November 4, 1986
    Assignee: The Dow Chemical Company
    Inventor: Edward W. Orr
  • Low styrene emission vinyl ester resin employing polyacrylates for fiber-reinforced applications
    Patent number: 4619953
    Abstract: Low styrene emission vinyl ester resin compositions containing a polyacrylate as an adhesion promoter. Said VER composition exhibits desirable physical properties such as low styrene emission and excellent adhesive bond strength.
    Type: Grant
    Filed: September 9, 1985
    Date of Patent: October 28, 1986
    Assignee: The Dow Chemical Company
    Inventors: John A. Schols, Kee C. Yu
  • Monomeric plasticizers for halogen-containing resins
    Patent number: 4620026
    Abstract: A composition having utility as a plasticizer for halogen-containing resins is a mixture of (a) at least two diesters of terephthalic acid or (b) at least two triesters of trimellitic acid. The diesters of terephthalic acid are represented by the general formula ##STR1## wherein R.sub.1 is a phenyl radical or an aliphatic hydrocarbon radical of the formula C.sub.n H.sub.m, wherein n is an integer of 1 through 8 inclusive and m is equal to 2n+1; R.sub.2 is either hydrogen or an aliphatic hydrocarbon having one, two, three or four carbon atoms; x is an integer of 2 to 4 inclusive; y is an integer of 2 to 4 inclusive;The trialkyl esters of trimellitic acid are represented by the general formula ##STR2## wherein R.sub.1 is a phenyl radical or an aliphatic hydrocarbon radical of the formula C.sub.n H.sub.m wherein n is an integer of 1 through 8 inclusive and m is equal to 2n+1; R.sub.
    Type: Grant
    Filed: August 10, 1984
    Date of Patent: October 28, 1986
    Assignee: The Dow Chemical Company
    Inventor: Sanford A. Siegel
  • Apparatus and method for the non-destructive inspection of solid bodies
    Patent number: 4619143
    Abstract: The non-destructive testing of solid bodies is conducted by generating a transverse, ultrasonic surface wave in the solid body being inspected, said surface waves having sufficient different frequencies such that they travel at different depths through the body being inspected; receiving at least a part of the reflected portion, if any, of the surface waves, the reflected portion consisting of at least two surface waves having sufficiently different frequencies such that these waves travelled at distinctly different depths through the solid body and filtering and measuring or analyzing the reflected portion of the surface waves to determine if a defect or discontinuity exists in the solid body and the depth or severity of the defect or discontinuity.
    Type: Grant
    Filed: August 24, 1984
    Date of Patent: October 28, 1986
    Assignee: Dow Chemical (Nederl) B.V.
    Inventor: Ferdinand M. J. Franken
  • Flame resistant carbonate blends
    Patent number: 4619968
    Abstract: Carbonate polymer blend compositions which exhibit flame resistant properties comprising a carbonate polymer and grafted rubber compound in which at least a portion of the grafted on the rubber backbone is a flame resistant polymer.
    Type: Grant
    Filed: August 12, 1985
    Date of Patent: October 28, 1986
    Assignee: The Dow Chemical Company
    Inventor: David E. Henton
  • Multi-modal emulsions of water-soluble polymers
    Patent number: 4619967
    Abstract: Multi-modal emulsions comprise a continuous oil phase and a discontinuous aqueous phase having two or more droplet size distributions and comprising a water-soluble polymer. Such emulsions are prepared by subjecting portions of the emulsion to varying rates of shear during emulsion formation. The multi-modal emulsions can have high polymer solids, reduced oil content, low bulk viscosity and high stability.
    Type: Grant
    Filed: November 2, 1984
    Date of Patent: October 28, 1986
    Assignee: The Dow Chemical Company
    Inventors: Richard R. Emerson, Do I. Lee, James P. Easterly
  • Method for increased mine recovery and upgrading of lignite
    Patent number: 4619669
    Abstract: A method is disclosed for upgrading run-of-the-mine (ROM) lignites to remove the gangue (clays, rock etc.) which form ash when the lignite is burned. The unique features of the process, a combination of unit operations in a specified sequence, result in less loss of combustible fuel value without hydrodegradation (the production of a large volume of fines) normally associated with contact of the lignite with water as in pipeline transport of lignite.
    Type: Grant
    Filed: November 23, 1984
    Date of Patent: October 28, 1986
    Assignee: The Dow Chemical Company
    Inventors: Elvis E. Jones, Terry A. Pearce, Dacon C. Laird, III, James H. Everitt
  • Acne control method
    Patent number: 4619826
    Abstract: A method for controlling acne or acneform eruptions in humans is disclosed. The method involves the topical application of one or more sebum-imbibing, sebum-retaining polymers either alone or in combination with a pharmaceutically acceptable carrier.
    Type: Grant
    Filed: December 7, 1984
    Date of Patent: October 28, 1986
    Assignee: The Dow Chemical Company
    Inventors: George E. Lay, Richard A. Knipstein, Daniel H. Haigh
  • Eneynols from acetylenes and propargylic alcohols
    Patent number: 4620045
    Abstract: Eneynols are prepared from terminal acetylenes and propargylic alcohols using a Cu.sup.+, Ag.sup.+ and/or Au.sup.+ halide catalyst.
    Type: Grant
    Filed: March 19, 1985
    Date of Patent: October 28, 1986
    Assignee: The Dow Chemical Company
    Inventors: Giffin D. Jones, Harold E. Doorenbos
  • Production of phenols and catalyst therefor
    Patent number: 4620043
    Abstract: Multicomponent catalysts comprising copper, a metal selected from the group consisting of vanadium, chromium, manganese, iron, cobalt, nickel and zinc; and phosphate are employed for oxidizing an aromatic carboxylic acid to the corresponding phenol, e.g., benzoic acid to phenol.
    Type: Grant
    Filed: October 17, 1985
    Date of Patent: October 28, 1986
    Assignee: The Dow Chemical Company
    Inventors: Chiu T. Lam, David M. Shannon
  • Polymer modified epoxy resin compositions
    Patent number: 4618658
    Abstract: Polymer modified epoxy resin compositions are disclosed which comprise (A) an epoxy resin wherein a portion of the epoxide groups have been reacted to provide groups containing polymerizable ethylenic unsaturation; (B) at least one vinyl terminated urethane oligomer and optionally (C) at least one polymerizable ethylenically unsaturated compound. These compositions are useful as intermediates to novel polymer modified vinyl esters and thermoset (cured) products.
    Type: Grant
    Filed: May 16, 1985
    Date of Patent: October 21, 1986
    Assignee: The Dow Chemical Company
    Inventors: Robert E. Hefner, Jr., Virginia B. Messick
  • Organic polymer composition containing an antistatic agent comprising a nonvolatile ionizable metal salt and a salt or ester of a carboxylic acid
    Patent number: 4618630
    Abstract: An antistatic additive for polymers, particularly polyurethanes is disclosed comprising an ionizable metal salt and an enhancer comprising a non-ionizable salt or ester of an organic acid.
    Type: Grant
    Filed: July 2, 1985
    Date of Patent: October 21, 1986
    Assignee: The Dow Chemical Co.
    Inventors: Thomas M. Knobel, Earl E. Kennedy, Mary A. Walker
  • Curable compositions containing multiglycidyl ethers and a sulfonic acid amide
    Patent number: 4618526
    Abstract: Curable compositions are disclosed which comprise a multiglycidyl ether such as the triglycidylether of tris(hydroxyphenyl)methane and an amine substituted sulfonic acid amide such as sulfanilamide. These compositions can be cured by heating in the presence or absence of an accelerator such as 2-methyl imidazole. These compositions are particularly useful in the preparation of electrical laminates.
    Type: Grant
    Filed: July 22, 1985
    Date of Patent: October 21, 1986
    Assignee: The Dow Chemical Company
    Inventors: Jody R. Berman, Dennis L. Steele, Michael P. Kubisiak
  • Nitro substituted diphenyl ethers
    Patent number: 4618727
    Abstract: Nitro-isopropenyldiphenyl ethers are provided which can serve as a useful source of known monomer intermediates or as intermediates for the preparation of nitro-haloisopropyl substituted diphenyl ethers. The latter have been discovered to act as facile alkylating agents with phenols providing nitro-p-hydroxyphenylisopropyl substituted diphenyl ethers. When the latter compounds are reduced there are obtained the corresponding amino-p-hydroxyphenylisopropyl substituted diphenyl ethers.The polymerization of this last class of compounds with acid halides provides polyamide-esters. The polymers can be used in the manufacture of such articles as tubing, hose, bellows hose, and the like.
    Type: Grant
    Filed: November 5, 1984
    Date of Patent: October 21, 1986
    Assignee: The Dow Chemical Company
    Inventor: Shenghong A. Dai
  • O,O'-, O,S'- or S,S'-dithiodialkylene-bis(mono- or dihydrocarbyl carbamothioates) and S,S'-dithiodialkylene-bis(mono- or dihydrocarbyl carbamodithioates) and method of preparation thereof
    Patent number: 4618461
    Abstract: The invention relates to novel O,O'-, O,S'- or S,S'-dithiodialkylene-bis(mono- or dihydrocarbyl carbamothioates) and S,S'-dithiodialkylene-bis(mono- or dihydrocarbyl carbamodithioate). The novel compounds of this invention are useful as collectors in the froth flotation of sulfide mineral ores.
    Type: Grant
    Filed: July 25, 1983
    Date of Patent: October 21, 1986
    Assignee: The Dow Chemical Company
    Inventors: Roger W. Bergman, Harry A. Smith
  • Dual dispensing bottle
    Patent number: 4618076
    Abstract: A dual dispensing bottle includes two upwardly extending necks having a trigger sprayer attached to one neck and a frangible orifice creating section integrally formed in the other neck. The frangible section is easily removed by twisting and doubles as a plug for the created orifice. The frangible twist-off section enables the consumer to dispense a large amount of product independently of and without removing the trigger sprayer. Since the frangible section is an integral part of the bottle, the easy open/reclose feature is obtained with negligible increase in the manufacturing cost of the bottle.
    Type: Grant
    Filed: July 20, 1983
    Date of Patent: October 21, 1986
    Assignee: The Dow Chemical Company
    Inventor: Scott A. Silvenis
  • Method and apparatus for determining the solubility of volatile materials in non-volatile materials
    Patent number: 4617828
    Abstract: Method and apparatus for determining solubilities of gases and mixtures of gases in polymeric material at various temperature and pressure conditions. Employs means for saturating polymer with a gas, means for desorbing the sorbed gas by a flowing desorbing gas stream, means for sampling the desorbing gas stream and detecting the concentration of the desorbed gas in the desorbing gas, and means for calculating the total amount of gas desorbed from the polymeric material.
    Type: Grant
    Filed: March 29, 1985
    Date of Patent: October 21, 1986
    Assignee: The Dow Chemical Company
    Inventor: Stephen R. Ellebracht
  • Process for making salt coated magnesium granules
    Patent number: 4617200
    Abstract: There is disclosed a process for the preparation of substantially uniform granules of magnesium coated with a mixed salt composition from a eutectic melt. The process comprises the steps of forming globules of magnesium by shear action in a molten eutectic mixed salt bath which is maintained molten at a temperature of at last ten degrees Centrigrade below the freezing temperature of the magnesium.
    Type: Grant
    Filed: June 6, 1985
    Date of Patent: October 14, 1986
    Assignee: The Dow Chemical Company
    Inventor: Hugh C. Behrens