Patents Represented by Attorney Neal T. Levin
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Patent number: 4876384Abstract: Radiation curable compositions containing outstanding reactive diluents have been developed. The diluents are lower alkyl ether acrylates and methacrylates of particular alkoxylated and non-alkoxylated polyols.Examples are mono-methoxy trimethylolpropane diacrylate, mono-methoxy neopentyl glycol monoacrylate and mono-methoxy, ethoxylated neopentyl glycol monoacrylate having an average of about two moles of ethylene oxide.Type: GrantFiled: April 8, 1986Date of Patent: October 24, 1989Assignee: Diamond Shamrock Chemicals Co.Inventors: Francis A. Higbie, Robert A. LieBerman, Ira M. Rose
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Patent number: 4814389Abstract: An aqueous drilling fluid having present in an amount sufficient to disperse the fluid and to provide resistance to high temperatures and solids contamination of the drilling fluid, at least one salt of a polymer or copolymer of acrylic or methacrylic acid with alkanolamine, alkylamine, mixtures of alkanolamine and alkylamine, mixtures of lithium and alkanolamine, mixtures of lithium and alkylamine and mixtures of lithium, alkanolamine and alkylamine, the polymer having a weight average molecular weight of between about 2,000 and about 15,000 and a pH of from about 6 to about 8.5 and where mixtures of lithium and alkanolamine, lithium and alkylamine or mixtures of lithium, alkanolamine and alkylamine are used, the amount of lithium is present to give from about 30% to about 70% of the desired neutralization of the polymer and the alkanolamine and/or alkylamine is present to give from about 70% to about 30% of the desired neutralization of the polymer.Type: GrantFiled: July 8, 1987Date of Patent: March 21, 1989Assignee: Diamond Shamrock Chemicals CompanyInventors: Christopher M. Garvey, Arpad Savoly, Thomas M. Weatherford
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Patent number: 4810328Abstract: An improved method of brown stock washing is disclosed. A nonionic surfactant in combination with a polyelectrolyte dispersant, and preferably a solvent, are utilized in the washing step in the pulping of virgin cellulosic fiber. The methods of the invention provide for the enhanced removal and recovery of cooking chemicals and organics from the pulp.Type: GrantFiled: November 4, 1987Date of Patent: March 7, 1989Assignee: Diamond Shamrock Chemicals CompanyInventors: Richard E. Freis, James E. Maloney, Thomas R. Oakes
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Patent number: 4800229Abstract: Reactive dispersants for magnetic recording media are prepared by sequentially phosphating and esterifying or esterifying and phosphating alkoxylated alcohols having at least two carbon atoms and at least two hydroxyl groups. The phosphating agent can be phosphorus oxychloride while the esterifying agent can be acrylic acid.Type: GrantFiled: January 12, 1988Date of Patent: January 24, 1989Assignee: Diamond Shamrock Chemical CompanyInventor: John G. Papalos
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Patent number: 4780500Abstract: Copolymers of (1) from about 80% to about 98% by weight of acrylic acid and (2) from about 2% to about 20% by weight of itaconic acid and having a weight average molecular weight of between about 100,000 to about 800,000 and which are at least water dispersible are useful as retention aids for paper coating compositions.Type: GrantFiled: April 17, 1987Date of Patent: October 25, 1988Assignee: Henkel CorporationInventors: Joseph V. Sinka, Dinshaw F. Bardoliwalla, Jose L. Villa, Edwin L. Kelley, Albert L. Resnick
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Patent number: 4770952Abstract: Reactive dispersants for magnetic recording media are prepared by sequentially phosphating and esterifying or esterifying and phosphating alkoxylated alcohols having at least two carbon atoms and at least two hydroxyl groups. The phosphating agent can be phosphorus oxychloride while the esterifying agent can be acrylic acid.Type: GrantFiled: July 10, 1987Date of Patent: September 13, 1988Assignee: Diamond Shamrock Chemicals CompanyInventor: John G. Papalos
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Patent number: 4751322Abstract: The monomer, trimethyl ammonium ethyl methacrylate methosulfate, is purified by passing same through a column of activated charcoal having a mean particle diameter of from about 0.5 mm to aboug 1.2 mm, the height to diameter ratio of the column being from about 3 to about 12 to 1. Monomer so treated can be polymerized to higher molecular weight polymers.Type: GrantFiled: April 25, 1986Date of Patent: June 14, 1988Assignee: Diamon Shamrock Chemical Co.Inventors: Stephen A. Fischer, Dinshaw F. Bardoliwalla, Reuben H. Grinstein, Gary L. Speenburgh
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Patent number: 4744795Abstract: The present invention relates to coal water slurries containing about 0.01% to 1% by weight of a water soluble terpolymer of ethylacrylate/methacrylic acid/ unsaturated carboxylic acid ester of an ethoxylated or nonethoxylated alcohol or an ethoxylated carboxylic acid.The water soluble terpolymer functions as a stablizing agent for the coal water slurry to prevent sedimentation and provide ease of pumping the coal water slurry.The water soluble terpolymer may be used alone or in combination with anionic or nonionic dispersants.Type: GrantFiled: August 21, 1986Date of Patent: May 17, 1988Assignee: Diamond Shamrock Chemicals CompanyInventors: Arpad Savoly, Jose L. Villa, Reuben H. Grinstein, Solomon J. Nachfolger
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Patent number: 4742105Abstract: Binary mixtures of polyacrylates and sodium silicates are used as deflocculating agents for kaolin slurries to ensure pumpability and pourability of the slurry. An example of a binary mixture is a mixture of 67% by weight sodium polyacrylate having a weight average molecular weight of 4,200 and 33% by weight of sodium silicate on a dry solids basis.Type: GrantFiled: May 29, 1986Date of Patent: May 3, 1988Assignee: Diamond Shamrock Chemicals CompanyInventor: Edwin L. Kelley
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Patent number: 4741843Abstract: Drilling fluid compositions and methods of using such compositions in oil, gas and water well drilling fluid operations to reduce fluid loss from the composition to the formation are disclosed. Such compositions incorporate a terpolymer formed from (a) a vinyl containing alkyl or aromatic substituted sulfonate selected from the group consisting of 2-acrylamido, 2-methyl propane sulfonic acid (AMPS), sodium vinyl sulfonate or vinyl benzene sulfonate, and method salts thereof at about 10 to 75 weight percent in the polymer; (b) an unsaturated polybasic acid such as itaconic acid at about 1 to 60 weight percent; and metal salts thereof and (c) a nonionic monomer selected from the group consisting of acrylamide, N, N-dimethylacrylamide, N-vinyl pyrrolidone, N-vinyl acetamide, or dimethylamino ethyl methacrylate and metal salts thereof at about 10 to 76 weight percent.The terpolymer should have a molecular weight between 200,000 to 1,000,000. The preferred terpolymer comprises AMPS, acrylamide and itaconic acid.Type: GrantFiled: September 26, 1986Date of Patent: May 3, 1988Assignee: Diamond Shamrock ChemicalInventors: Christopher M. Garvey, Arpad Savoly, Albert L. Resnick
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Patent number: 4711731Abstract: An aqueous drilling fluid having present in an amount sufficient to disperse the fluid and to provide resistance to high temperatures and solids contamination of the drilling fluid, at least one salt of a polymer or copolymer of acrylic or methacrylic acid with alkanolamine, alkylamine, mixtures of alkanolamine and alkylamine, mixtures of lithium and alkanolamine, mixtures of lithium and alkylamine and mixtures of lithium, alkanolamine and alkylamine, the polymer having a weight average molecular weight of between about 2,000 and about 15,000 and a pH of from about 6 to about 8.5 and where mixtures of lithium and alkanolamine, lithium and alkylamine or mixtures of lithium, alkanolamine and alkylamine are used, the amount of lithium is present to give from about 30% to about 70% of the desired neutralization of the polymer and the alkanolamine and/or alkylamine is present to give from about 70% to about 30% of the desired neutralization of the polymer.Type: GrantFiled: February 6, 1986Date of Patent: December 8, 1987Assignee: Diamond Shamrock Chemicals CompanyInventors: Christopher M. Garvey, Arpad Savoly, Thomas M. Weatherford
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Patent number: 4699225Abstract: Polymers of (1) from about 5% to about 50% by weight of 2-acrylamido-2-methylpropane sulfonic acid and (2) from about 95% to about 50% by weight of a second component, there being from 100% to about 80% by weight acrylic acid and from 0% to about 20% by weight of itaconic acid in the second component and having a weight average molecular weight of between about 50,000 to about 1,000,000 and which are at least water dispersible are used as fluid loss control additives for aqueous drilling fluids and are particularly advantageous when used with muds containing soluble calcium ions and muds containing chloride ions such as seawater muds. An example is a copolymer of 10% by weight 2-acrylamido-2-methylpropane sulfonic acid and 90% by weight acrylic acid in its sodium salt form.Type: GrantFiled: November 7, 1985Date of Patent: October 13, 1987Assignee: Diamond Shamrock Chemicals CompanyInventor: Dinshaw F. Bardoliwalla
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Patent number: 4676836Abstract: Aqueous lubricant dispersions having solids content of from about 50% by weight to about 75% by weight contain calcium stearate, dispersing agent, anionic lubricant and urea are characterized by increased solids content.Type: GrantFiled: September 11, 1986Date of Patent: June 30, 1987Assignee: Diamond Shamrock Chemicals CompanyInventors: John A. Hill, Gregory J. Flynn
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Patent number: 4674574Abstract: Cementing compositions and methods of using such compositions in oil, gas and water well cementing operations to reduce fluid loss from the composition to the formation are disclosed. Such compositions incorporate a terpolymer formed from (a) an acid monomer selected from the group consisting of 2-acrylamido, 2-methyl propane sulfonic acid (AMPS), sodium vinyl sulfonate or vinyl benzene sulfonate, and metal salts thereof at about 10 to 75 weight percent in the polymer; (b) an unsaturated polybasic acid such as itaconic acid at about 1 to 60 weight percent; and metal salts thereof and (c) a nonionic monomer selected from the group consisting of acrylamide, N, N dimethylacrylamide, N-vinyl pyrrolidone, N-vinyl acetamide, or dimethylamino ethyl methacrylate and metal salts thereof at about 10 to 76 weight percent. The terpolymer should have a molecular weight between 200,000 to 1,000,000. The preferred terpolymer comprise AMPS, acrylamide and itaconic acid.Type: GrantFiled: September 26, 1986Date of Patent: June 23, 1987Assignee: Diamond Shamrock Chemicals CompanyInventors: Arpad Savoly, Jose L. Villa, Christopher M. Garvey, Albert L. Resnick
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Patent number: 4659489Abstract: Aqueous lubricant dispersions having solids content of from about 50% by weight to about 75% by weight contain calcium stearate, dispersing agent, nonionic lubricant and urea are characterized by increased solids content.Type: GrantFiled: June 22, 1984Date of Patent: April 21, 1987Assignee: Diamond Shamrock Chemicals CompanyInventors: John A. Hill, Gregory J. Flynn
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Patent number: 4647384Abstract: Copolymers of (1) from about 80% to about 98% by weight of acrylic acid and (2) from about 2% to about 20% by weight of itaconic acid and having a weight average molecular weight of between about 50,000 to about 1,000,000, preferably between about 100,000 to about 500,000, and which are at least water dispersible, are used as fluid loss control additives for aqueous drilling fluids and are particularly advantageous when used with muds containing soluble calcium and muds containing chloride ions such as seawater muds. An example is a copolymer of 95% by weight acrylic acid and 5% by weight itaconic acid in its sodium salt form.Type: GrantFiled: November 12, 1985Date of Patent: March 3, 1987Assignee: Diamond Shamrock Chemicals CompanyInventors: Dinshaw F. Bardoliwalla, Jose L. Villa
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Patent number: 4622370Abstract: Copolymers of (1) from about 80% to about 98% by weight of acrylic acid and (2) from about 2% to about 20% by weight of itaconic acid and having a weight average molecular weight of between about 50,000 to about 1,000,000, preferably between about 100,000 to about 500,000, and which are at least water dispersible, are used as fluid loss control additives for aqueous drilling fluids and are particularly advantageous when used with muds containing soluble calcium and muds containing chloride ions such as seawater muds. An example is a copolymer of 95% by weight acrylic acid and 5% by weight itaconic acid in its sodium salt form.Type: GrantFiled: May 1, 1984Date of Patent: November 11, 1986Assignee: Diamond Shamrock Chemicals CompanyInventors: Dinshaw F. Bardoliwalla, Jose L. Villa
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Patent number: 4622373Abstract: Polymers of (1) from about 5% to about 50% by weight of 2-acrylamido-2-methylpropane sulfonic acid and (2) from about 95% to about 50% by weight of a second component, there being from 100% to about 80% by weight acrylic acid and from 0% to about 20% by weight of itaconic acid in the second component and having a weight average molecular weight of between about 50,000 to about 1,000,000 and which are at least water dispersible are used as fluid loss control additives for aqueous drilling fluids and are particularly advantageous when used with muds containing soluble calcium ions and muds containing chloride ions such as seawater muds. An example is a copolymer of 10% by weight 2-acrylamido-2-methylpropane sulfonic acid and 90% by weight acrylic acid in its sodium salt form.Type: GrantFiled: May 10, 1984Date of Patent: November 11, 1986Assignee: Diamond Shamrock Chemicals CompanyInventor: Dinshaw F. Bardoliwalla
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Patent number: 4605698Abstract: Polyfunctional aziridines useful in crosslinking applications have been developed which are reaction products of (1) ethylene imine and (2) acrylates of alkoxylated trimethylol propane, neopentyl glycol, pentaerythritol, bis phenol A, bis phenol F and glycerol, each having a degree of alkoxylation of from about 2 to about 12. Examples are the bis aziridine of the diacrylate of the adduct of neopentyl glycol and 2 moles of ethylene oxide and the tris aziridine of the triacrylate of the adduct of trimethylol propane and 3 moles of ethylene oxide.Type: GrantFiled: September 12, 1985Date of Patent: August 12, 1986Assignee: Diamond Shamrock Chemicals CompanyInventor: Frank C. Briden
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Patent number: 4563307Abstract: Polyfunctional aziridines useful in crosslinking applications have been developed which are reaction products of (1) ethylene imine and (2) acrylates of alkoxylated trimethylol propane, neopentyl glycol, pentaerythritol, bis phenol A, bis phenol F and glycerol, each having a degree of alkoxylation of from about 2 to about 12. Examples are the bis aziridine of the diacrylate of the adduct of neopentyl glycol and 2 moles of ethylene oxide and the tris aziridine of the triacrylate of the adduct of trimethylol propane and 3 moles of ethylene oxide.Type: GrantFiled: July 13, 1983Date of Patent: January 7, 1986Assignee: Diamond Shamrock Chemicals CompanyInventor: Frank C. Briden