Patents Represented by Attorney David H. Fifield
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Patent number: 4980445Abstract: The present invention concerns a thermoplastic polyurethane material which is the reaction product of (1) a mixture of (a) 0.86 to 0.98 mole equivalent of a polyester diol having the molecular weight of from 650 to 5,000 and (b) 0.02 to 0.14 mole equivalent of a polyether diol having the molecular weight of from 2,000 to 5,000, and (2) a difunctional chain extender with (3) an organic diisocyanate. These polyurethane materials exhibit high resistance to severe abrasion forces while retaining desirable mechanical properties and are useful for the manufacture of shoe soles, ski boots, ski bindings, conveyor belts and screens used by mining industry and the like.Type: GrantFiled: January 17, 1989Date of Patent: December 25, 1990Assignee: The Dow Chemical CompanyInventors: Hanno R. van Der wal, Henry W. Bonk, John Penfold
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Patent number: 4466833Abstract: A foamed, cement slurry comprising an aqueous hydraulic cement slurry containing gas as discrete entrained bubbles and a specific quaternary ammonium compound as a foaming agent; and a process of plugging a subterranean void by emplacing the foamed slurry in the subterranean void and then permitting the foamed slurry to therein harden.Type: GrantFiled: July 2, 1982Date of Patent: August 21, 1984Assignee: The Dow Chemical CompanyInventor: Lloyd B. Spangle
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Patent number: 4423206Abstract: 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: GrantFiled: June 21, 1982Date of Patent: December 27, 1983Assignee: The Dow Chemical Co.Inventors: David L. Wolfe, Frederick P. Corson
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Patent number: 4376723Abstract: 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: GrantFiled: June 16, 1981Date of Patent: March 15, 1983Assignee: The Dow Chemical CompanyInventors: David L. Wolfe, Frederick P. Corson
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Patent number: 4351933Abstract: Compounds represented by the formula: ##STR1## and addition polymers thereof where m is an integer from 2 to about 10, X-- is chlorine, hydroxy, carboxy or:--AC--R).dbd.CH.sub.2--R is hydrogen or methyl, --R--' is an ethylene or propylene group and--AC--R).dbd.CH.sub.2is one of: ##STR2## These compounds and their addition polymers form complexes with alkali metal or alkaline earth metal salts and permit the concentration of aqueous solutions of said salts. For example, a compound of the formula: ##STR3## is polymerized with an azobis (isobutyronitrile) catalyst to form addition polymers of the repeating unit ##STR4## When cross-linked, rendering it water-insoluble, such an addition polymer concentrates an aqueous solution of sodium chloride when contacted with same at about 0.degree. C.Type: GrantFiled: June 8, 1981Date of Patent: September 28, 1982Assignee: The Dow Chemical Co.Inventors: Thomas A. Chamberlin, Donald A. Tomalia
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Patent number: 4351928Abstract: A four-component composition is disclosed comprising a hydroxyl-bearing polymer; a liquid, amino- or hydroxyaromatic diluent having an atmospheric boiling point of about 150.degree. C. or greater; an aminoplast or phenolic resin capable of curing the hydroxyl-bearing polymer and a strong acid catalyst for the reaction between the first and third components. Optionally, a pigment may be added to the composition.Type: GrantFiled: October 26, 1981Date of Patent: September 28, 1982Assignee: The Dow Chemical CompanyInventor: Harry A. Smith
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Patent number: 4331785Abstract: Compounds represented by the formula ##STR1## and addition polymers thereof where m is an integer from 2 to about 10, X- is chlorine, hydroxy, carboxy or-AC-R).dbd.CH.sub.2-R is hydrogen or methyl, -R' is an ethylene or propylene group and-AC-R).dbd.CH.sub.2is one of ##STR2## These compounds and their addition polymers form complexes with alkali metal or alkaline earth metal salts and permit the concentration of aqueous solutions of said salts. For example, a compound of the formula ##STR3## is polymerized with an azobis(isobutyronitrile) catalyst to form addition polymers of the repeating unit ##STR4## When cross-linked, rendering it water-insoluble, such an addition polymer concentrates an aqueous solution of sodium chloride when contacted with same at about 0.degree. C.Type: GrantFiled: December 28, 1979Date of Patent: May 25, 1982Assignee: The Dow Chemical Co.Inventors: Thomas A. Chamberlin, Donald A. Tomalia
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Patent number: 4308031Abstract: N-substituted perhydro-s-triazine compounds can be used to increase the solubility of alkali or alkaline earth metal salts in an organic medium. Increasing the solubility of such salts catalyzes the reaction between the salts and other components of the organic medium. For example, 5 percent of a tris(n-octylpolyoxyethylene)-N,N',N"-perhydro-s-triazine compound catalyzes the reaction between sodium iodide and n-octyl bromide at 80.degree. C. for 1 hour to form 100 percent yield of n-octyl iodide.Type: GrantFiled: May 9, 1980Date of Patent: December 29, 1981Assignee: The Dow Chemical CompanyInventor: Andrew T. Au
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Patent number: 4266054Abstract: N-substituted perhydro-s-triazine compounds can be used to increase the solubility of alkali or alkaline earth metal salts in an organic medium. Increasing the solubility of such salts catalyzes the reaction between the salts and other components of the organic medium. For example, 5 percent of a tris(n-octylpolyoxyethylene)-N,N',N"-perhydro-3-triazine compound catalyzes the reaction between sodium iodide and n-octyl bromide at 80.degree. C. for 1 hour to form 100 percent yield of n-octyl iodide.Type: GrantFiled: May 9, 1980Date of Patent: May 5, 1981Assignee: The Dow Chemical CompanyInventor: Andrew T. Au
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Patent number: 4256855Abstract: Compounds represented by the formula ##STR1## and addition polymers thereof where m is an integer from 2 to about 10, x--is chlorine, hydroxy, carboxy or--AC--R).dbd.CH.sub.2--R is hydrogen or methyl, --R' is an ethylene or propylene group and--AC--R).dbd.CH.sub.2is one of ##STR2## These compounds and their addition polymers form complexes with alkali metal or alkaline earth metal salts and permit the concentration of aqueous solutions of said salts. For example, a compound of the formula ##STR3## is polymerized with an azobis(isobutyronitrile) catalyst to form addition polymers of the repeating unit ##STR4## When cross-linked, rendering it water-insoluble, such an addition polymer concentrates an aqueous solution of sodium chloride when contacted with same at about 0.degree. C.Type: GrantFiled: November 16, 1978Date of Patent: March 17, 1981Assignee: The Dow Chemical CompanyInventors: Thomas A. Chamberlin, Donald A. Tomalia
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Patent number: 4256622Abstract: A four-component composition is disclosed comprising 100 parts of a non-aminoplast hydroxyl-bearing polymer; about 5-100 parts of a (poly)glycol monoether having an atmospheric boiling point of about 300.degree. C. or greater; an aminoplast or phenolic resin capable of curing the hydroxyl-bearing polymer and a strong acid catalyst for the reaction between the first and third components. Optionally, a pigment may be added to the composition.Type: GrantFiled: January 7, 1980Date of Patent: March 17, 1981Assignee: The Dow Chemical CompanyInventor: Harry A. Smith
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Patent number: 4252644Abstract: An ion exchange composition comprising an insoluble substrate of a synthetic resin having ion exchanging sites at least on its available surface; and a finely divided, insoluble material comprising synthetic resin particles of from about 0.1 to about 5 microns median diameter (with respect to volume) having, at least on their outer surfaces, ion exchanging sites which attract the ion exchanging sites of the substrate, irreversibly attached as a monolayer to the available surface of the substrate. The composition is used for removal and separatin of ions, and is especially useful in liquid ion exchange chromatography.Type: GrantFiled: May 25, 1979Date of Patent: February 24, 1981Assignee: The Dow Chemical CompanyInventors: Hamish Small, Timothy S. Stevesn
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Patent number: 4229362Abstract: A process for esterifying terminal hydroxyl groups of a polyoxyalkylene compound comprising one or more ring opened tert.-butyl or tert.-amyl glycidyl ether groups, without removing a significant portion of these tert.-alkyl ether groups. The process is conducted by contacting the polyoxyalkylene compound with an organic, carboxylic acid or anhydride in the liquid phase, in the presence of a small but catalytically effective amount of a Lewis base.Type: GrantFiled: April 16, 1979Date of Patent: October 21, 1980Assignee: The Dow Chemical CompanyInventor: Paula R. Norman
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Patent number: 4221861Abstract: An improved process for preparing a film bearing a light sensitive emulsion, backside coated with a topical antistat, comprising:(a) applying to the backside a photographically inert compound curable by exposure to a free-radical source which compound is a copolymer comprised of ethylene oxide and glycidyl .alpha.,.beta.-unsaturated monocarboxylates and(b) exposing said compound to a free-radical source sufficient to render it durably attached to the backside by curing the unsaturated portions thereofand films prepared by said process.Type: GrantFiled: April 6, 1978Date of Patent: September 9, 1980Assignee: The Dow Chemical CompanyInventors: Paula R. Norman, Sally P. Ginter
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Patent number: 4183862Abstract: Novel compounds of the formula ##STR1## wherein --D-- is a methylene group which is a member of an oxetane or a 1,3-dioxane ring, --R-- is ethylene or propylene bearing from 0-6 methyl groups and m and n are lower integers. For example, a compound of the formula ##STR2## is contacted with dilute HCl to give a monomer ##STR3## which is copolymerized with a diisocyanate to give a copolymer which removes SO.sub.2 from gas streams.Type: GrantFiled: May 2, 1978Date of Patent: January 15, 1980Assignee: The Dow Chemical CompanyInventor: Edwin C. Steiner
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Patent number: 4161573Abstract: Disclosed is a method for making polystyrene with M.sub.w between about 1,000 and about 50,000 and M.sub.w /M.sub.n ratio of less than about 8 by cationically polymerizing styrene monomer under substantially isothermal conditions where the conversion of styrene monomer is carried out in 2 or more stages by contacting with a cation generator. The polystyrene product finds utility as plasticizer for high molecular weight polystyrenes, as a binder resin in various coating applications, and as a precursor for further functionalized polystyrene derivatives. For example, a polystyrene of about 13,000 M.sub.w and M.sub.w /M.sub.n of about 4.9 is prepared by contacting styrene monomer with BF.sub.3 in 4 stages between a temperature of about 60.degree. C. and about 80.degree. C.Type: GrantFiled: July 25, 1977Date of Patent: July 17, 1979Assignee: The Dow Chemical CompanyInventors: Jeffrey A. Gunsher, Joseph L. Garner, Conrad O. M. Miller
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Patent number: 4160740Abstract: A coolant comprising water and one of 1-methoxy-2-propanol, 2-methoxy-1-propanol or mixtures thereof, resistant to degradation of fluoroelastomers and which is inhibited against corrosion of ferrous metals, aluminum and solder is disclosed. The desired coolant is prepared by reacting in situ or adding the reaction product of one or more phosphoric acids and an inorganic base selected from potassium hydroxide, sodium hydroxide or mixtures thereof, and optionally contains, as a copper or brass deactivator mercaptobenzothiazole, a benzotriazole, a sodium or potassium salt of mercaptobenzothiazole or a benzotriazole, or mixtures of these, wherein the pH of the coolant is adjusted to between about 6 and about 9 by balancing the relative amounts of phosphoric acids and inorganic bases to attain said pH. For example, about 53 parts 1-methoxy-2-propanol, 46 parts water, 0.8 parts K.sub.2 HPO.sub.4, 0.1 part orthophosphoric acid and 0.Type: GrantFiled: October 17, 1977Date of Patent: July 10, 1979Assignee: The Dow Chemical CompanyInventor: Forest H. Sweet, III
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Patent number: 4140847Abstract: Novel linear, branched and cyclic polymers of the repeating unit ##STR1## wherein R is ethylene or propylene bearing from zero to six methyl groups and m and n are lower integers and a process for utilizing said polymers to extract salts from solution are disclosed. For example, a monomer of the formula ##STR2## is contacted with traces of water in the presence of BF.sub.3.etherate to give a homopolymer consisting essentially of repeating units of the formula ##STR3## which extracts sodium salts from aqueous solution in a thermally reversible manner.Type: GrantFiled: October 1, 1974Date of Patent: February 20, 1979Assignee: The Dow Chemical CompanyInventors: Jon A. Orvik, Edwin C. Steiner
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Patent number: 4139539Abstract: Compounds represented by the formula ##STR1## AND ADDITION POLYMERS THEREOF WHERE M IS AN INTEGER FROM 2 TO ABOUT 10, X-- is chlorine, hydroxy, carboxy or--AC--(R).dbd.CH.sub.2--r is hydrogen or methyl, --R-- is an ethylene or propylene group and--AC--(R).dbd.CH.sub.2is one of ##STR2## These compounds and their addition polymers form complexes with alkali metal or alkaline earth metal salts and permit the concentration of aqueous solutions of said salts. For example, a compound of the formula ##STR3## is polymerized with an azobis(isobutyronitrile) catalyst to form addition polymers of the repeating unit ##STR4## When cross-linked, rendering it water-insoluble, such an addition polymer concentrates an aqueous solution of sodium chloride when contacted with same at about 0.degree. C.Type: GrantFiled: December 17, 1976Date of Patent: February 13, 1979Assignee: The Dow Chemical CompanyInventors: Thomas A. Chamberlin, Donald A. Tomalia
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Patent number: 4130688Abstract: This invention relates a relatively low molecular weight polystyrene having a narrow molecular weight distribution range in combination with a 1 to 3-aromatic hydrocarbon ring compound, chloromethylated derivatives thereof, quaternary amine derivatives of said chloromethylated derivatives and the use of such amines as electroconductive resins for the preparation of electroconductive coated papers useful for electrographic printing.Type: GrantFiled: January 3, 1978Date of Patent: December 19, 1978Assignee: The Dow Chemical CompanyInventor: Joseph L. Garner