Patents by Inventor Edward A. Barsa
Edward A. Barsa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20090240086Abstract: A process for making glycerol di-tert-butyl ethers is disclosed. In one aspect of the invention, glycerol and isobutylene react in the presence of a ?-zeolite having a silicon to aluminum ratio greater than 150. In another aspect, the etherification is performed in the presence of a ?-zeolite and added tert-butyl alcohol. Each process selectively provides glycerol di-tert-butyl ethers while reducing the generation of isobutylene dimers and trimers. Utilizing both aspects of the inventive process simultaneously affords a diether product mixture containing less than 5 wt. % of isobutylene oligomers.Type: ApplicationFiled: March 18, 2008Publication date: September 24, 2009Inventors: Edward A. Barsa, Beth M. Steinmetz
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Patent number: 7070648Abstract: A gypsum composition containing a sulfonate-containing comb-branched copolymer is disclosed. The sulfonate-containing comb-branched copolymer comprises recurring units of a polyether macromonomer, an acrylic monomer, and a sulfonate monomer. The sulfonate-containing comb-branched copolymer not only increases the fluidity of gypsum slurry but also has reduced retardation on the gypsum setting.Type: GrantFiled: June 16, 2005Date of Patent: July 4, 2006Assignee: Lyondell Chemical Technology, L.P.Inventors: Steven A. Schwartz, Frank J. Liotta, Jr., Edward A. Barsa
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Patent number: 5856420Abstract: Disclosed are new coatings compositions based on an HDI isocyanurate or biuret polyisocyanate and a bis(imine) reaction product of a diaminoalkane containing between two and five carbon atoms with an alkyl aldehyde containing between four and seven carbon atoms (advantageously a bis(imine) product of the reaction of 1,4-diaminobutane and isobutyraldehyde). The latter bis(imine) is completely miscible in HDI isocyanurate and biuret polyisocyanates, and, as a reactive diluent, allows the preparation of high performance coatings formulations that require only small amounts of solvents to achieve a conveniently sprayable viscosity.Type: GrantFiled: April 17, 1996Date of Patent: January 5, 1999Assignee: Arco Chemical Technology, L.P.Inventors: Benjamin W. Tucker, Henry G. Barnowski, Jr., Edward A. Barsa, Peter J. Whitman, Augustin T. Chen, Willard F. Burt, Stephen L. Goldstein, James M. O'Connor
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Patent number: 5691440Abstract: A process for preparing isocyanate adducts having a high proportion of monoisocyanurate using a quaternary ammonium carboxylate trimerization catalyst. Also claimed are specific carboxylate catalysts, together with a process for producing the catalysts. The catalysts are particularly useful for trimerizing hexamethylene diisocyanate and isophorone diisocyanate.Type: GrantFiled: October 5, 1995Date of Patent: November 25, 1997Assignee: Arco Chemical Technonogy, L.P.Inventors: Lawrence E. Katz, Edward A. Barsa, Benjamin W. Tucker, Paul V. Grosso
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Patent number: 5298431Abstract: This invention relates to a multi-step process for isolating a cyclotrimerized isocyanate from mixture containing said cyclotrimerized isocyanate plus an isocyanate oligomer which comprises the steps of: (a) contacting said mixture with a liquid solvent to provide a solvent-containing mixture, (b) extracting said solvent-containing mixture by liquid-liquid extraction to cause said solvent-containing mixture to elute into an extractate and a residue, wherein said extractate is a cyclotrimerized isocyanate that is essentially oligomer-free and is further characterized by having reduced viscosity relative to said solvent-containing mixture, and (c) separating uncyclotrimerized monomer from said extractate to provide a reduced viscosity trimer product that is essentially free of monomer. Also disclosed is the reduced-viscosity product produced by this process.Type: GrantFiled: September 30, 1991Date of Patent: March 29, 1994Assignee: Olin CorporationInventors: Stephen L. Goldstein, Edward A. Barsa
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Patent number: 4632785Abstract: Disclosed is a method for the trimerization of organic isocyanates comprising thermally activating, in the presence of said isocyanates, a catalyst comprising a carboxylic acid salt selected from the alkali metal salts or quaternary ammonium salts of particular substituted malonic acids of half-esters thereof, particular carbamyl substituted aliphatic acids, or triaryl acetic acids.Mixtures of the catalysts with isocyanates have surprisingly long periods of stability at ambient temperatures (about 20.degree. C.) which makes the present method particularly suitable to systems for molding polyisocyanurates wherein long open times are required of a resin pre-mix prior to the actual curing step.Type: GrantFiled: July 1, 1985Date of Patent: December 30, 1986Assignee: The Dow Chemical CompanyInventor: Edward A. Barsa
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Patent number: 4540781Abstract: Disclosed is a method for the trimerization of organic isocyanates comprising thermally activating, in the presence of said isocyanates, a catalyst comprising a carboxylic acid salt selected from the alkali metal salts or quaternary ammonium salts of particular substituted malonic acids or half-esters thereof, particular carbamyl substituted aliphatic acids, or triaryl acetic acids.Mixtures of the catalysts with isocyanates have surprisingly long periods of stability at ambient temperatures (about 20.degree. C.) which makes the present method particularly suitable to systems for molding polyiso-cyanurates wherein long open times are required of a resin pre-mix prior to the actual curing step.Type: GrantFiled: August 11, 1983Date of Patent: September 10, 1985Assignee: The Upjohn CompanyInventor: Edward A. Barsa
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Patent number: 4448816Abstract: Described are compounds characterized by the following formula: ##STR1## wherein C.sub.n H.sub.2n is alkylene from 2 to 12 carbon atoms and C.sub.m H.sub.2m is alkylene from 2 to 20 carbon atoms. Each of the alkylene groups can, optionally, be substituted by inert substituents. The compounds contain a free isocyanato group and a masked isocyanate group, namely, the cyclic urea moiety, which, when the compounds are heated, preferably in the presence of a catalyst, opens to give the group OCN--C.sub.n H.sub.2n --. Thus, the compounds can be reacted via the free isocyanate group with active hydrogen-containing monomers or polymers to form storage stable compositions which, upon heating, are curable via reaction with the cyclic urea group.Type: GrantFiled: August 4, 1983Date of Patent: May 15, 1984Assignee: The Upjohn CompanyInventors: Edward A. Barsa, Philip W. Sherwood
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Patent number: 4423204Abstract: Novel amorphous copolyamides are provided which are the product of reaction of (A) a lactam, (B) a bisimidazoline, and (C) a dicarboxylic acid, wherein the proportions of reactants based on 100 mole percent are from about 43 to about 82 mole percent of lactam (A) and the remaining 18 to 57 mole percent divided between said (B) and said (C) in substantially equimolar proportions.The copolyamides are characterized by better resistance to elevated temperatures than 100 percent polycaprolactam polyamides but at the same time are easily molded because of their amorphous character.Type: GrantFiled: September 2, 1982Date of Patent: December 27, 1983Assignee: The Upjohn CompanyInventors: Edward A. Barsa, Kemal Onder
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Patent number: 4410689Abstract: Bis(cyclic ureas) are disclosed which have the formula ##STR1## wherein R is ##STR2## and C.sub.n H.sub.2n is ethylene or 1,3-propylene each of which can be substituted by one or more inert substituents.These compounds are useful as masked diisocyanates which, on heating in the presence of a polyol and, optionally, a polyurethane catalyst, give rise to polyurethane resins. Accordingly, they are useful as a component of storage stable compositions which are convertible to polyurethanes upon heating. Such compositions are particularly useful as solvent-less coating compositions. The properties of the above compounds are distinguished in a number of respects from the known bis(cyclic ureas) in which C.sub.n H.sub.2n has 4 or more carbon atoms in the chain between the valencies. Illustratively, the above compounds are more stable on exposure to heat in the absence of catalysts but, in the presence of polyurethane catalysts, react with polyols at a significantly faster rate than the prior art compounds.Type: GrantFiled: June 16, 1982Date of Patent: October 18, 1983Assignee: The Upjohn CompanyInventors: Edward A. Barsa, Chung-Yuan Lin, Fred A. Stuber
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Patent number: 4349663Abstract: Bis(cyclic ureas) are disclosed which have the formula ##STR1## wherein R is ##STR2## and C.sub.n H.sub.2n is ethylene or 1,3-propylene each of which can be substituted by one or more inert substituents.These compounds are useful as masked diisocyanates which, on heating in the presence of a polyol and, optionally, a polyurethane catalyst, give rise to polyurethane resins. Accordingly, they are useful as a component of storage stable compositions which are convertible to polyurethanes upon heating. Such compositions are particularly useful as solvent-less coating compositions. The properties of the above compounds are distinguished in a number of respects from the known bis(cyclic ureas) in which C.sub.n H.sub.2n has 4 or more carbon atoms in the chain between the valencies. Illustratively, the above compounds are more stable on exposure to heat in the absence of catalysts but, in the presence of polyurethane catalysts, react with polyols at a significantly faster rate than the prior art compounds.Type: GrantFiled: November 10, 1980Date of Patent: September 14, 1982Assignee: The Upjohn CompanyInventors: Edward A. Barsa, Chung-Yuan Lin, Fred A. Stuber