Patents by Inventor Charles J. Stark
Charles J. Stark 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: 6359037Abstract: An aqueous system comprises at least one epoxy resin and a reaction product with an amine equivalent weight of at least 50 prepared by the reaction of an (A) epoxy-functional amidoamine derived from at least one epoxy resin and an amidoamine obtained via the reaction of an acid-terminated polyalkylene glycol and a diamine in an active hydrogen:epoxy groups ratio of from 1:15 to 1:350, with (B) at least one polyamine in an active amine hydrogen:epoxy groups equivalent ratio of from 2:1 to 30:1, and, optionally (C) a monoepoxide in a remaining active amine hydrogen:epoxy groups equivalent ratio of from 5:1 to 20:1.Type: GrantFiled: August 10, 2000Date of Patent: March 19, 2002Inventors: Charles J. Stark, Gayle Edward Back, Jimmy D. Elmore, Kalyan Ghosh, Pen-Chung Wang, Kailash Dangayach
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Patent number: 6277928Abstract: A water-dispersible curing agent for epoxy resins is prepared by the reaction of (a) an epoxy-functional compound obtained from the reaction of at least one epoxy resin and an amidoamine derived from the reaction of an acid-terminated polyalkylene glycol and a diamine in an active amine hydrogen:epoxy groups ratio of from 1:15 to 1:350, (b) at least one polyamine in an active amine hydrogen:epoxy groups ratio of from 2:1 to 30:1 which yields an amine-terminated product having an amine equivalent weight of at least 50, and, optionally, (c) a monoepoxy in a remaining active amine hydrogen:epoxy groups ratio of from 5:1 to 20:1.Type: GrantFiled: June 10, 1998Date of Patent: August 21, 2001Inventors: Charles J. Stark, by Ann E. Stark, adminstrator, Gayle Edward Back, Jimmy D. Elmore, Kalyan Ghosh, Pen-Chung Wang, Kailash Dangayach
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Patent number: 6221934Abstract: Stable aqueous emulsions of epoxy resins are provided using an epoxy-functional surfactant prepared by reacting an amidoamine having the formula: wherein R1 is an alkyl, aryl, or arylalkyl group or mixtures thereof having 1 to 15 carbon atoms, R2 is aliphatic, cycloaliphatic, or aromatic group having 2 to 18 carbon atoms optionally containing non-reactive oxygen or at most all average of 4 secondary and/or tertiary nitrogen atoms per structure in the backbone, X and Y are independently a hydrogen, methyl or ethyl group with the provision that if X is methyl or ethyl, Y is hydrogen or if Y is methyl or ethyl, X is hydrogen, and n+m+o is a real number from 40 to 400, and n+o is a real number in an amount effective to provide resin emulsification, and the ratio of (I) to (II) by weight.Type: GrantFiled: July 17, 1998Date of Patent: April 24, 2001Assignee: Shell Oil CompanyInventors: Charles J. Stark, Jimmy D. Elmore, Gayle Edward Back, Pen-Chung Wang, Ernest Charles Galgoci, Jr.
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Patent number: 6136894Abstract: An aqueous epoxy resin system suitable for coatings comprises (a) water, (b) at least one epoxy resin and (c) a curing agent prepared by (i) reacting at least one polyamine having at least 3 active amine hydrogen atoms per molecule and at least one epoxy resin in an epoxy equivalent to to polyamine mole ratio of from 0.9:1 to 1:10 to obtain an amine-terminated intermediate; (ii) reacting the amine-terminated intermediate with from 0.5 to 25 weight percent, based on the amine-terminated intermediate, of an acid-terminated polyalkylene glycol to yield an amine-terminated curing agent. The amine-terminated intermediate can be capped with a monoepoxide in an amine hydrogen to epoxy groups ratio of from about 1.5:1 to 30:1 prior to reaction with the acid-terminated polyalkylene glycol, or the amine-terminated curing agent following step (ii) can be capped with a monoepoxide in an amine hydrogen atoms to epoxy groups ratio of from about 2:1 to 30:1.Type: GrantFiled: November 19, 1999Date of Patent: October 24, 2000Assignee: Shell Oil CompanyInventors: Charles J. Stark, deceased, Gayle Edward Back, Jimmy D. Elmore, Kalyan Ghosh, Pen-Chung Wang, Kailash Dangayach
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Patent number: 6127459Abstract: A water-compatible curing agent for epoxy resins is prepared by (a) reacting at least one polyamine having at least 3 active amine hydrogen atoms per molecule and at least one epoxy resin in an epoxy equivalent to polyamine mole ratio of from 0.9:1 to 1:10 to obtain an amine-terminated intermediate; (b) reacting the amine-terminated intermediate with from 0.5 to 25 weight percent, based on the amine-terminated intermediate, of an acid-terminated polyalkylene glycol to yield an amine-terminated curing agent. The amine-terminated intermediate can be capped with a monoepoxide in an amine hydrogen atoms to epoxy groups ratio of from about 1.5:1 to 30:1 prior to reaction with the acid-terminated polyalkylene glycol, or the amine-terminated curing agent produced following step (b) can be capped with a monoepoxide.Type: GrantFiled: June 10, 1998Date of Patent: October 3, 2000Assignee: Shell Oil CompanyInventors: Charles J. Stark, deceased, Gayle Edward Back, Jimmy D. Elmore, Kalyan Ghosh, Pen-Chung Wang, Kailash Dangayach
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Patent number: 5602193Abstract: A stable aqueous emulsions of epoxy resins are provided using an epoxy-functional polyether having the formula: ##STR1## wherein Q is A or B, R.sup.1 is independently a divalent hydrocarbon group, R.sup.2 is a divalent aliphatic group optionally containing ether or ester groups or together with R.sup.3 or R.sup.4 form a spiro ring optionally containing heteroatoms, and R.sup.3 and R.sup.4 are independently hydrogen or R.sup.3 or R.sup.4 together with R.sup.2 form a spiro ring optionally containing heteroatoms such as oxygen, X and Y are independently hydrogen, methyl or ethyl group with the provision that if X is methyl or ethyl, Y is hydrogen or if Y is methyl or ethyl, X is hydrogen and n+m+o is a positive real number from about 15 to 450, and where Q is B, n+o is a real number in an amount effective to provide emulsifying property.Type: GrantFiled: October 31, 1995Date of Patent: February 11, 1997Assignee: Shell Oil CompanyInventor: Charles J. Stark
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Patent number: 5284901Abstract: A process for making polymers of conjugated dienes which contain hydroxyl groups, including highly reactive primary hydroxyl groups, in the diene blocks which comprises(a) making a precursor polymer by polymerizing at least one conjugated diene which leaves 1,2 disubstituted, 1,1 disubstituted, 1,1,2 trisubstituted or tetrasubstituted olefinic unsaturation in the polymer,(b) optionally partially hydrogenating said precursor polymer,(c) epoxidizing said precursor polymer such that epoxy groups form at said substituted sites and the amount of epoxy functionality in the polymer is from at least 0.1 Meq/g polymer, and(d) reacting the epoxidized polymer with an alcohol having one unprotected hydroxyl group in a solvent in the presence of a Lewis acid selected from the group consisting of MX.sub.n where M is selected from the group consisting of boron, aluminum, iron and tin, and X is a halogen, and organic complexes of such acids.A diene polymer containing 0.Type: GrantFiled: April 16, 1993Date of Patent: February 8, 1994Assignee: Shell Oil CompanyInventors: Robert C. Bening, James R. Erickson, Charles J. Stark, David J. St. Clair
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Patent number: 5264480Abstract: A process for making polymers of conjugated dienes which contain hydroxyl groups, including highly reactive primary hydroxyl groups, in the diene blocks which comprises(a) making a precursor polymer by polymerizing at least one conjugated diene which leaves 1,2 disubstituted, 1,1 disubstituted, 1,1,2 trisubstituted or tetrasubstituted olefinic unsaturation in the polymer,(b) optionally partially hydrogenating said precursor polymer,(c) epoxidizing said precursor polymer such that epoxy groups form at said substituted sites and the amount of epoxy functionality in the polymer is from at least 0.1 Meq/g polymer, and(d) reacting the epoxidized polymer with an alcohol having one unprotected hydroxyl group in a solvent in the presence of a Lewis acid selected from the group consisting of MX.sub.n where M is selected from the group consisting of boron, aluminum, iron and tin, and X is a halogen, and organic complexes of such acids.A diene polymer containing 0.Type: GrantFiled: April 16, 1993Date of Patent: November 23, 1993Assignee: Shell Oil CompanyInventors: Robert C. Bening, James R. Erickson, Charles J. Stark, David J. St. Clair
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Patent number: 5262496Abstract: A process for making polymers of conjugated dienes which contain hydroxyl groups, including highly reactive primary hydroxyl groups, in the diene blocks which comprises(a) making a precursor polymer by polymerizing at least one conjugated diene which leaves 1,2 disubstituted, 1,1 disubstituted, 1,1,2 trisubstituted or tetrasubstituted olefinic unsaturation in the polymer,(b) optionally partially hydrogenating said precursor polymer,(c) epoxidizing said precursor polymer such that epoxy groups form at said substituted sites and the amount of epoxy functionality in the polymer is from at least 0.1 Meq/g polymer, and(d) reacting the epoxidized polymer with an alcohol having one unprotected hydroxyl group in a solvent in the presence of a Lewis acid selected from the group consisting of MX.sub.n where M is selected from the group consisting of boron, aluminum, iron and tin, and X is a halogen, and organic complexes of such acids.A diene polymer containing 0.Type: GrantFiled: April 16, 1993Date of Patent: November 16, 1993Assignee: Shell Oil CompanyInventors: Robert C. Bening, James R. Erickson, Charles J. Stark, David J. St. Clair
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Patent number: 5242989Abstract: A process for making polymers of conjugated dienes which contain hydroxyl groups, including highly reactive primary hydroxyl groups, in the diene blocks which comprises(a) making a precursor polymer by polymerizing at least one conjugated diene which leaves 1,2 disubstituted, 1,1 disubstituted, 1,1,2 trisubstituted or tetrasubstituted olefinic unsaturation in the polymer,(b) optionally partially hydrogenating said precursor polymer,(c) epoxidizing said precursor polymer such that epoxy groups form at said substituted sites and the amount of epoxy functionality in the polymer is from at least 0.1 Meq/g polymer, and(d) reacting the epoxidized polymer with an alcohol having one unprotected hydroxyl group in a solvent in the presence of a Lewis acid selected from the group consisting of MX.sub.n where M is selected from the group consisting of boron, aluminum, iron and tin, and X is a halogen, and organic complexes of such acids.A diene polymer containing 0.Type: GrantFiled: April 3, 1992Date of Patent: September 7, 1993Assignee: Shell Oil CompanyInventors: Robert C. Bening, James R. Erickson, Charles J. Stark, David J. St. Clair
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Patent number: 5021537Abstract: A coating composition is provided comprising an epoxy resin, a polyacetoacetate, a curing agent for the epoxy resin, and an optional organic solvent. The presence of the polyacetoacetate permits the preparation of a fast-drying high-solids coating formulation.Type: GrantFiled: April 27, 1990Date of Patent: June 4, 1991Assignee: Shell Oil CompanyInventors: Charles J. Stark, Rita D. Pietruszka
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Patent number: 4670504Abstract: There is provided a tackifier composition especially suited for use with natural rubber latex and formed from an olefin resin, preferably a polymerized terpene hydrocarbon resin condensed with an unsaturated carboxylic acid or anhydride, optionally partially esterified with a C.sub.1 -C.sub.30 alcohol or phenol, and neutralized with a base, preferably a volatile base such as an amine, and then dispersed in an aqueous medium. The tackifier when added to a latex forms compositions useful particularly as pressure sensitive adhesives.Type: GrantFiled: July 8, 1985Date of Patent: June 2, 1987Assignee: Sylvachem CorporationInventors: Carlos G. Cardenas, James M. Evans, Charles J. Stark, William J. Ehmann
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Patent number: 4389529Abstract: A mixture of tetrachloroacetone and hydrogen peroxide has been found effective for epoxidizing olefinically unsaturated organic material dissolved in various aromatic or halogenated aliphatic organic solvents.Type: GrantFiled: April 22, 1982Date of Patent: June 21, 1983Assignee: General Electric CompanyInventor: Charles J. Stark
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Patent number: 4344887Abstract: A mixture of tetrachloroacetone and hydrogen peroxide has been found effective for epoxidizing olefinically unsaturated organic material dissolved in various aromatic or halogenated aliphatic organic solvents.Type: GrantFiled: May 15, 1981Date of Patent: August 17, 1982Assignee: General Electric CompanyInventor: Charles J. Stark
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Patent number: 4307212Abstract: Curable epoxy resin compositions which exhibit controllable cure rates are described which utilize catechol derived accelerators in combination with certain curing agents. These accelerators can be employed in single package curable epoxy resin compositions useful in molding and casting applications.Type: GrantFiled: August 14, 1980Date of Patent: December 22, 1981Assignee: General Electric CompanyInventor: Charles J. Stark, Jr.
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Patent number: 4307213Abstract: Diesters of catechol and ring substituted catechol exhibit enhanced characteristics as accelerators in the cure of epoxy resins when utilized in combination with a cure initiator, such as an oxygen titanate or zirconate.Type: GrantFiled: September 5, 1980Date of Patent: December 22, 1981Assignee: General Electric CompanyInventor: Charles J. Stark, Jr.
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Patent number: 4297457Abstract: Aryl esters exhibit enhanced characteristics as accelerators in the cure of epoxy resins when utilized in combination with a cure initiator, such as an organic titanate or zirconate.Type: GrantFiled: July 11, 1980Date of Patent: October 27, 1981Assignee: General Electric CompanyInventor: Charles J. Stark, Jr.
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Patent number: 4297458Abstract: Curable epoxy resin compositions which exhibit controllable cure rates and extended storage life are described which utilize silyl ethers of catechol as accelerators in combination with certain curing agents. These accelerators can be employed in single package curable epoxy resin compositions useful in molding and casting applications.Type: GrantFiled: July 14, 1980Date of Patent: October 27, 1981Assignee: General Electric CompanyInventor: Charles J. Stark, Jr.
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Patent number: 4297459Abstract: Curable epoxy resin compositions which exhibit controllable cure rates and extended storage life are described which utilize allylethers of catechol as accelerators in combination with certain curing agents. These accelerators can be employed in single package curable epoxy resin compositions useful in molding and casting applications.Type: GrantFiled: August 8, 1980Date of Patent: October 27, 1981Assignee: General Electric CompanyInventor: Charles J. Stark, Jr.
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Patent number: 4288603Abstract: Accelerators useful for the cure of epoxy resin compositions are derived from the silylation of substituted catechol derivatives.Type: GrantFiled: July 14, 1980Date of Patent: September 8, 1981Assignee: General Electric CompanyInventor: Charles J. Stark, Jr.