Patents Assigned to The Dow Chemical Co.
  • Patent number: 4435459
    Abstract: A fire suppressant composition is provided for particular use in polyurethane backed carpets for airplanes which suppressant comprises a combination of (1) an organic filler composition comprising (a) a hydrated alumina compound, (b) a hydrated zinc borate, (c) an inorganic lead-containing compound and (d) an inorganic antimony-containing compound and (2) a halogen-containing resin.
    Type: Grant
    Filed: March 18, 1983
    Date of Patent: March 6, 1984
    Assignee: The Dow Chemical Co.
    Inventors: Linda D. McKinney, Randall C. Jenkines
  • Patent number: 4433148
    Abstract: Compounds are prepared which correspond to the formula ##STR1## wherein R represents a nitrogen containing heterocyclic radical corresponding to one of the formulae ##STR2## each X independently represents chloro, fluoro, bromo, nitro, alkyl of 1 to 4 carbon atoms, amino, mono- or dialkylamino wherein each alkyl group independently contains from 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, alkylthio of 1 to 4 carbon atoms, alkylsulfinyl of 1 to 4 carbon atoms, alkylsulfonyl of 1 to 4 carbon atoms, cyano, trifluoromethyl, trichloromethyl, phenoxy or substituted phenoxy of the formula ##STR3## wherein each Z independently represents chloro, fluoro, bromo, nitro, cyano, alkoxy of 1 to 4 carbon atoms or alkylthio of 1 to 4 carbon atoms, with the proviso that when either n is 2 or 3, all X groups are sterically compatible with each other and all Z groups are sterically compatible with each other; Y represents oxygen or sulfur; each n can independently represent an integer of from 0 to 3, inclusive; R.sup.
    Type: Grant
    Filed: November 12, 1982
    Date of Patent: February 21, 1984
    Assignee: The Dow Chemical Co.
    Inventor: Chester E. Pawloski
  • Patent number: 4432408
    Abstract: Method of and apparatus for exchanging heat between two fluids wherein a core member is composed essentially of vermicular expanded graphite which has been compressed primarily along one axis and heat is exchanged in the core member between the two fluids along an axis normal to the primary axis of compression of the core member.
    Type: Grant
    Filed: July 19, 1982
    Date of Patent: February 21, 1984
    Assignee: The Dow Chemical Co.
    Inventor: Ronald S. Caines
  • Patent number: 4430311
    Abstract: Formation of hydrous alumina in the reticules of a weak-base anion exchange resin, wherein AlCl.sub.3 has been precipitated as hydrous alumina by reaction with ammonia, is improved by employing a subsequent treatment with HCl or with NH.sub.4 Cl and HCl to convert the exchange resin to the chloride form, thereby increasing the reticular volume of the resin, thus permitting subsequent precipitation of additional hydrous alumina therein.
    Type: Grant
    Filed: April 22, 1983
    Date of Patent: February 7, 1984
    Assignee: The Dow Chemical Co.
    Inventors: John M. Lee, William C. Bauman
  • Patent number: 4430097
    Abstract: Particles of crystalline LiX.multidot.2Al(OH).sub.3 .multidot.nH.sub.2 O, where X is a monovalent, divalent, or trivalent anion, especially chlorine, are useful in separating hydrocarbons according to boiling point ranges.
    Type: Grant
    Filed: March 22, 1982
    Date of Patent: February 7, 1984
    Assignee: The Dow Chemical Co.
    Inventor: John L. Burba, III
  • Patent number: 4428805
    Abstract: Electroconductive substrates for use as oxygen electrodes are coated with an optional interface layer and then with cobalt oxide spinels conforming substantially to the empirical formulaM.sub.x Z.sub.y CO.sub.3.sbsb.-(x+y) O.sub.4where M represents at least one metal from the Groups IB, IIA, IIB, where Z represents at least one metal from Group IA where x is equal to or greater than zero but not greater than 1, where y is equal to or greater than zero but not greater than 0.5, and where (x plus 2y) is equal to or greater than zero but not greater than 1. The composites are prepared by thermally oxidizing metal oxide precursors in-situ on the substrate, including, optionally, modifier metal oxide materials as a separate dispersed phase in the contiguous spinel structure. The interface layer comprises at least one oxide of Pb, Sn, Sb, Al, In, or mixtures of these. The electrodes are used as the anodic means in an electrolysis cell wherein oxygen is produced by electrolyzing an oxygen-containing electrolyte.
    Type: Grant
    Filed: August 24, 1981
    Date of Patent: January 31, 1984
    Assignee: The Dow Chemical Co.
    Inventors: Donald L. Caldwell, Mark J. Hazelrigg, Jr.
  • Patent number: 4429125
    Abstract: Compounds of the formula: ##STR1## wherein R is hydrogen; alkyl of 1 to 8 carbons; alkylthiomethyl, alkylsulfinylmethyl or alkylsulfonylmethyl wherein alkyl contains 1 to 4 carbons; phenyl; phenylthio; alkylthio, alkylsulfinyl or alkylsulfonyl wherein alkyl contains 1 to 4 carbons; or alkylthio-ethylthio wherein alkyl contains 1 to 2 carbons;R' is hydrogen, methyl or alkylthio of 1 to 2 carbons;R" is hydrogen or methyl;X is oxygen or sulfur;R'" is alkyl of 1 to 2 carbons; andR"" is --OR'" or --S-alkyl of 1 to 4 carbons,are highly useful insecticides which are paricularly valuable when applied to the soil, but are also useful applied to foliage of crops or trees. Especially good control is obtained of corn rootworm, codling moth, thrips, leafhoppers, and nematodes. The compounds are conveniently applied in the form of a composition containing a pesticidal carrier such as an inert solvent or a finely divided inert solid in which case the composition is preferably granulated.
    Type: Grant
    Filed: July 28, 1978
    Date of Patent: January 31, 1984
    Assignee: The Dow Chemical Co.
    Inventor: Walter Reifschneider
  • Patent number: 4427813
    Abstract: A polycarbonate such as a bisphenol-A homopolycarbonate containing a small amount of an aromatic bis(cyclic phosphate) such as 2,2'-[(1-methylethylidene)bis(4,1-phenyleneoxy-2,1-ethanediyloxy)]bis(5,5- dimethyl-2,2'-dioxo-1,3,2-dioxaphosphorinane) exhibits improved thermal stability.
    Type: Grant
    Filed: December 14, 1981
    Date of Patent: January 24, 1984
    Assignee: The Dow Chemical Co.
    Inventors: Gerald K. McEwen, Lowell S. Thomas
  • Patent number: 4423206
    Abstract: A polymerization process for vicinal alkylene oxides and a catalyst for said polymerization process where the catalyst comprises a composition prepared by contacting an alkyl aluminum compound with an organic nitrogen base compound selected from secondary nitrogen-containing compounds having basicity less than or about equal to the basicity of dimethylamine, with a .beta.-diketone and with water where the components are combined in prescribed molar ratios. The molecular weight of the resultant polymers produced in a process utilizing such a catalyst may be controlled by adjusting the ratio of the secondary amine component and very high molecular weight polymers may be obtained, as determined by their intrinsic viscosities. The very high molecular weight polymeric products are useful as elastomers and as thickeners for various aqueous or organic solutions.
    Type: Grant
    Filed: June 21, 1982
    Date of Patent: December 27, 1983
    Assignee: The Dow Chemical Co.
    Inventors: David L. Wolfe, Frederick P. Corson
  • Patent number: 4419299
    Abstract: Phosphonopolyester oligomers are prepared from hydroxyalkylated 2,2',-bis(3-allylphenyl-4-hydroxy) alkanes and phosphonyl dihalides. The oligomers are useful in the preparation of polyester resins, epoxy resins, and polyurethanes.
    Type: Grant
    Filed: December 14, 1981
    Date of Patent: December 6, 1983
    Assignee: The Dow Chemical Co.
    Inventor: Robert E. Hefner, Jr.
  • Patent number: 4417969
    Abstract: An improved polymer for use as an ion exchange membrane in an electrolytic cell wherein the polymer has pendant chains containing sulfonic acid ion exchange groups and has an equivalent weight of between about 800 and about 1500. The polymers have a hydration product of less than about 22,000.The electrolytic cell and its method of operation are described when these polymers are used as ion exchange membranes.
    Type: Grant
    Filed: January 21, 1982
    Date of Patent: November 29, 1983
    Assignee: The Dow Chemical Co.
    Inventors: Bobby R. Ezzell, William P. Carl, William A. Mod
  • Patent number: 4416937
    Abstract: Polymer blends are provided which are characterized by good processability on conventional extrusion equipment to provide films having excellent adhesion to various substrates while still exhibiting good non-blocking properties during film manufacture, storage, shipment and use. Such blends comprise, based upon the total blend weight, from 5 to about 90 weight percent of a high melt index adhesive resin; from about 5 to about 90 weight percent of a relatively low melt index adhesive resin; and from about 5 to about 70 weight percent of non-adhesive resin having a melt index of from about 3 to about 10.
    Type: Grant
    Filed: March 8, 1983
    Date of Patent: November 22, 1983
    Assignee: The Dow Chemical Co.
    Inventor: Bruce A. Metzger
  • Patent number: 4415707
    Abstract: The use of polyvinyloctadecyl ethers as a processing modifier in the extrusion of polyolefin resins leads to a smoother surface of the extruded resin. Other beneficial effects include improved values of such important resin characteristics as tensile strength at break, percentage elongation at break, tearing resistance, and impact resistance.
    Type: Grant
    Filed: July 22, 1982
    Date of Patent: November 15, 1983
    Assignee: The Dow Chemical Co.
    Inventors: Robert R. Blanchard, Tommy R. Bourne
  • Patent number: 4415463
    Abstract: Viscosifiers for addition to high zinc salt brines, used as oil well workover and completion fluids, are prepared from natural polysaccharide gums by treatment with a basic nitrogen reagent, such as a quaternary ammonium compound, hexamethylene tetramine, or dimethylol urea. The treated viscosifiers have improved dispersibility and give increased viscosity effects in the brines. Preferably, the viscosifiers are prepared from carrageenan or locust bean gums.
    Type: Grant
    Filed: June 26, 1981
    Date of Patent: November 15, 1983
    Assignee: The Dow Chemical Co.
    Inventors: Benjamin Mosier, Jack L. McCrary, Karl G. Guilbeau
  • Patent number: 4415502
    Abstract: Polycarbonate type nonionic surfactant compositions comprising monohydroxy alcohols capped with polycarbonate groups. More specifically, the surfactant compositions comprise aliphatic, nonaromatic cycloaliphatic or aromatic alcohols which have been capped with block polycarbonate groups formed by the reaction of the alcohols with ethylene carbonate in the presence of an alkali metal salt catalyst. The surfactant properties of the compositions may be varied by first reacting the alcohols with ethylene oxide to form a block polyether group cap on the alcohols before the reaction with ethylene carbonate or by further reacting the polycarbonate capped alcohols with ethylene oxide to form a terminal polyether block group. The surfactants formed are a random distribution mixture of compositions wherein 2 to 20 moles of ethylene carbonate and 3 to 50 moles of ethylene oxide per mole of the alcohols are reacted together.
    Type: Grant
    Filed: December 4, 1981
    Date of Patent: November 15, 1983
    Assignee: The Dow Chemical Co.
    Inventors: John F. Timberlake, Daniel W. Baugh, Jr., Bobby Burkes
  • Patent number: 4410596
    Abstract: Epoxy resins having improved properties are prepared by reacting an epoxy resin with a dihydric phenol in the presence of a sufficient quantity of a phosphonium catalyst such that the product resulting from reacting a mixture of the catalyst, epoxy resin and dihydric phenol has a % epoxide difference from the theoretical percent epoxide of from about 0.5 to about 4.0.
    Type: Grant
    Filed: December 14, 1981
    Date of Patent: October 18, 1983
    Assignee: The Dow Chemical Co.
    Inventors: Ross C. Whiteside, Jr., Adolphus V. Gist, George A. Doorakian
  • Patent number: 4409227
    Abstract: 4-(((Heterocyclo)thio)methyl)benzoic acids, esters, amides and pharmaceutically-acceptable salts thereof having hypoglycemic activity in mammals, including a method of use and pharmaceutically-acceptable compositions.
    Type: Grant
    Filed: March 9, 1982
    Date of Patent: October 11, 1983
    Assignee: The Dow Chemical Co.
    Inventor: Donald P. Matthews
  • Patent number: 4406805
    Abstract: A reversible liquid/solid phase change composition comprising hydrated MgCl.sub.2 and one or more of Ba(OH).sub.2, Sr(OH).sub.2, CaO, SrCO.sub.3, BaO, Ca(OH).sub.2, Mg(OH).sub.2, MgO, Na.sub.3 AlF.sub.6 or CaC.sub.2 O.sub.4, added to the composition in an effective amount to suppress supercooling of the MgCl.sub.2 liquid phase.
    Type: Grant
    Filed: November 20, 1981
    Date of Patent: September 27, 1983
    Assignee: The Dow Chemical Co.
    Inventors: George A. Lane, Harold E. Rossow
  • Patent number: 4402846
    Abstract: A reversible liquid/solid phase change composition comprising hydrated Mg(NO.sub.3).sub.2 /MgCl.sub.2, and one or more of Sr(OH).sub.2, Ca(OH).sub.2, CaO or BaO, added to the composition in an effective amount to suppress supercooling of the Mg(NO.sub.3).sub.2 /MgCl.sub.2 liquid phase.
    Type: Grant
    Filed: October 28, 1981
    Date of Patent: September 6, 1983
    Assignee: The Dow Chemical Co.
    Inventors: George A. Lane, Harold E. Rossow
  • Patent number: RE31430
    Abstract: Copper, copper oxide, copper-chromium oxide, copper-molybdenum oxide or mixtures thereof have been found to be excellent heterogeneous catalysts for the conversion of nitriles in the presence of water to the corresponding amides. Using one such catalyst in a continuous flow reactor, acrylonitrile was almost 100% converted to acrylamide during more than six weeks of continuous operation.
    Type: Grant
    Filed: February 26, 1981
    Date of Patent: October 25, 1983
    Assignee: The Dow Chemical Co.
    Inventors: Clarence E. Habermann, Ben A. Tefertiller