Patents by Inventor Louis E. Trapasso
Louis E. Trapasso 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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Patent number: 6323306Abstract: High molecular weight, water-soluble, cross-linked cationic polymers are prepared by reacting amine-functionalized cationic base polymers, in which the monomer units of the base polymer contain from about 0.05 to about 5.0% amine functionalized monomer units and from about 95 to about 99.95% additional monomer units, including cationic monomer units and optional non-cationic monomer units, with an amount of a cross-linking agent, reactive with the amines of the base polymer, providing between about 0.02 to about 3.0 equivalents of cross-linking agent reactive groups per each mole of amine. The polymers are useful as coagulants and as coatings.Type: GrantFiled: September 8, 1998Date of Patent: November 27, 2001Assignee: Ciba Specialty Chemicals Water Treatments Ltd.Inventors: Zhiqiang Song, George W. Schriver, Dennis M. Mahoney, Louis E. Trapasso
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Patent number: 6215018Abstract: The present invention relates to a process to prepare alkyl (meth)acrylate esters from corresponding alkyl/methacrylate esters using an alkali metal alkoxide as an ester interchange catalyst to produce an alkyl (meth)acrylate ester monomer product C The present invention further relates to the use of bromide and iodide salts as free radical polymerization inhibitors. The present invention further relates to the use of a noninterfering alcohol or polyol that prevents anionic polymerization reactions of reactant ester B and/or alkyl (meth)acrylate product C.Type: GrantFiled: October 12, 1999Date of Patent: April 10, 2001Assignee: Ciba Specialty Chemicals CorporationInventors: Timothy M. Miller, Narayanan Pondicherry, Louis E. Trapasso, Aaron van de Sande
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Patent number: 6008404Abstract: The present invention relates to a process to prepare alkyl (meth)acrylate esters from corresponding alkyl/methacrylate esters using an alkali metal alkoxide as an ester interchange catalyst to produce an alkyl (meth)acrylate ester monomer product C ##STR1## The present invention further relates to the use of bromide and iodide salts as free radical polymerization inhibitors. The present invention further relates to the use of a noninterfering alcohol or polyol that prevents anionic polymerization reactions of reactant ester B and/or alkyl (meth)acrylate product C. The present invention further relates to a process for inhibiting polymerization of (meth)acrylates being synthesized in a transesterification or ester-ester interchange reaction system.Type: GrantFiled: August 11, 1998Date of Patent: December 28, 1999Assignee: Ciba Specialty Chemicals CorporationInventors: Timothy M. Miller, Narayanan Pondicherry, Louis E. Trapasso, Aaron van de Sande
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Patent number: 5606103Abstract: Methyl or ethyl esters of mono- and polycarboxylic acids are transesterified with alcohols and polyols by reaction in the presence of a catalytically effective amount of organotin catalyst, so that an alcohol or polyol carboxylic acid ester is formed, which is then washed with aqueous alkali having a pH bigger than about 13.2 so as to remove essentially all of the organotin catalyst, thereby permitting the recovery of the alcohol or polyol carboxylic acid ester essentially free of the organotin catalyst.Type: GrantFiled: December 28, 1995Date of Patent: February 25, 1997Assignee: CPS Chemical Company, Inc.Inventors: Louis E. Trapasso, Philip L. Meisel, Lee B. Meisel, Willy K. Chwang
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Patent number: 5498751Abstract: Esters of monocarboxylic acids are transesterified with 1,2- and 1,3-polyols by reaction in the presence of a catalytically effective amount of a dialkyltin oxide blended with an excess of dialkyltin dichloride, so that a polyol ester of the monocarboxylic acid is formed. A transesterification reaction of alcohols and polyols with methyl or ethyl mono- or polycarboxylic acid esters utilizing a dimethyltin catalyst is also disclosed, in which the alcohol or polyol carboxylic acid ester formed is essentially free of the organotin catalyst. Carboxylic acid esters produced by the described methods, as well as carboxylic acid esters that are free of organotin catalysts are also disclosed.Type: GrantFiled: September 3, 1993Date of Patent: March 12, 1996Assignee: CPS Chemical Company, Inc.Inventors: Louis E. Trapasso, Stanley J. Padegimas, Peter F. Epstein, Paul L. K. Hung, Purnendu Mukhopadhyay, Philip L. Meisel
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Patent number: 4414250Abstract: Thermosetting resin coatings are provided which cure rapidly and exothermically at ambient temperatures. Accelerated crosslinking is accomplished by the reaction of oxalic acid esters with amine-containing polymeric compositions.Type: GrantFiled: October 2, 1981Date of Patent: November 8, 1983Assignee: Celanese CorporationInventors: John R. Costanza, Louis E. Trapasso
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Patent number: 4172173Abstract: Non-woven fabric binders of ethylene-vinyl ester copolymers containing effective amounts of an alkyl polyether.Type: GrantFiled: June 30, 1976Date of Patent: October 23, 1979Assignee: Celanese CorporationInventors: Louis E. Trapasso, Charles L. Smart
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Patent number: 4075387Abstract: Binders for non-woven fabrics prepared from ethylene-vinyl acetate copolymers, a substituted acrylamide monomer and a vinyl ester monomer, reaction being made to take place under controlled conditions to effect over-polymerization.Type: GrantFiled: June 30, 1976Date of Patent: February 21, 1978Assignee: Celanese CorporationInventors: Louis E. Trapasso, William B. Horback
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Patent number: 4037040Abstract: There is provided a process for preparing water-soluble polyelectrolytes by a water-in-oil emulsion process. A mixture of a surfactant, free radical initiator, at least one water-soluble, oil-insoluble, ethylenically unsaturated monomer adapted to polymerize under refluxing conditions, oil and water (the oil and water being adapted to form an azeotropic boiling mixture) is heated with vigorous agitation. The monomer polymerizes at the reflux temperature under the vigorous agitation with a concomitant simultaneous loss of water. Finely divided, water-soluble particles result.Type: GrantFiled: March 8, 1976Date of Patent: July 19, 1977Assignee: Celanese CorporationInventors: Louis E. Trapasso, Charles V. Juelke
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Patent number: 4020123Abstract: Thermosetting resin compositions are provided which cure rapidly and exothermically at ambient temperatures. Accelerated crosslinking is accomplished by the reaction of polyisopropenyl ester with amine-containing polymeric compositions.Type: GrantFiled: December 11, 1974Date of Patent: April 26, 1977Assignee: Celanese CorporationInventor: Louis E. Trapasso
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Patent number: 4011393Abstract: This invention provides novel guar gum formate esters having a degree of substitution between about 0.01 and 3.0, and further provides a process for producing guar gum formate esters by the interaction of guar gum powder or guar gum splits with concentrated formic acid. The invention process represents a general method for formylation of polygalactomannan gums. The polygalactomannan gum formate esters are useful as flocculants, and as sizing agents for paper and textiles.Type: GrantFiled: April 28, 1975Date of Patent: March 8, 1977Assignee: Celanese CorporationInventor: Louis E. Trapasso
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Patent number: 3975341Abstract: There is provided a process for preparing polyelectrolytes by a water-in-oil emulsion process. A water-in-oil azeotropic emulsion is heated with agitation and a concentrated aqueous solution of small amounts of a polymerization initiator and gel inhibitor and at least one water-soluble vinyl monomer adapted to polymerize at reflux temperature with a concomitant loss of water by azeotropic distillation is added thereto to polymerize said water-soluble monomer.The polymerized product including a gel inhibitor forms a gel-free aqueous solution.Type: GrantFiled: August 5, 1974Date of Patent: August 17, 1976Assignee: Celanese CorporationInventor: Louis E. Trapasso
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Patent number: 3962332Abstract: This invention relates to di-olefinically unsaturated compounds which contain two quaternary ammonium moieties. Polymers and copolymers of these polyfunctional compounds are characterized by high charge density, and find application as flocculants, paper sizes, and electroconductive coatings.Type: GrantFiled: December 11, 1974Date of Patent: June 8, 1976Assignee: Celanese CorporationInventor: Louis E. Trapasso
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Patent number: 3962161Abstract: A method of crosslinking polymers containing unreacted olefinic groups at room temperature is disclosed. This process involves adding for each mole of olefin group present in the polymer three equivalents of a diisocyanate group-containing compound and one mole of nitromethane. This mixture forms in situ the acyl nitrile oxide group which then reacts with the olefin groups present in the polymer to effect a crosslinking reaction.Type: GrantFiled: March 17, 1975Date of Patent: June 8, 1976Assignee: Celanese CorporationInventor: Louis E. Trapasso
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Patent number: 3959376Abstract: The quaternary ammonium or phosphonium salts of halogenated lower alkene compounds such as 4-chloro-2-alkenyl trimethyl ammonium chloride are prepared by reacting a tri-lower alkyl amine or tri-lower alkyl phosphine with 3,4-dihaloalkene-1.Type: GrantFiled: January 28, 1974Date of Patent: May 25, 1976Assignee: Celanese CorporationInventor: Louis E. Trapasso