Patents by Inventor David J. St. Clair
David J. St. Clair 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: 5300586Abstract: A process for making polymers of conjugated dienes which contain 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 0.1 to 5 Meq/g polymer, and(d) reacting the epoxidized polymer with an alcohol solution of hydrochloric acid.A diene polymer containing 0.1 to 10 Meq/g polymer of hydroxyl group and comprised of alcohol units of the formula ##STR1## where R.sub.1 and R.sub.2 are hydrogen or alkyl radicals and X and X' are either --OH or --Cl and at least one of them is --OH.Type: GrantFiled: April 3, 1992Date of Patent: April 5, 1994Assignee: Shell Oil CompanyInventors: Robert C. Bening, James R. Erickson, David J. St. Clair, Carma J. Gibler, Joe J. Flores
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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: 5229464Abstract: A viscous block copolymer of the formula(A--B--A).sub.n --Y.sub.r --(A.sub.q --B).sub.mwherein Y is a coupling agent or coupling monomers, andwherein A and B are polymer blocks which may be homopolymer blocks of conjugated diolefin monomers, copolymer blocks of conjugated diolefin monomer or copolymer blocks of conjugated diolefin monomers and monoalkenyl aromatic hydrocarbon monomers, andwherein the A blocks have a higher number of aliphatic double bonds between a tertiary carbon atom and either a primary or secondary carbon atom per unit of block mass than do the B blocks, andwherein the A blocks have a molecular weight from about 100 to about 3000 and the B blocks have a molecular weight from about 1000 to about 15,000, andwherein p and q are 0 or 1 and n>0, r is 0 or 1, m.gtoreq.0 and n+m ranges from 1 to 100.This block copolymer is preferably partially hydrogenated, epoxidized and crosslinked through at least some of the epoxy functionality to form an adhesive, coating or sealant composition.Type: GrantFiled: April 29, 1991Date of Patent: July 20, 1993Assignee: Shell Oil CompanyInventors: James R. Erickson, David J. St. Clair
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Patent number: 5210147Abstract: A predominantly linear 100% triblock sequentially polymerized hydrogenated styrene-isoprene-styrene block copolymer composition comprised of linear polymeric blocks for use in adhesives, modified thermoplastic compositions and mechanical goods.Type: GrantFiled: May 20, 1991Date of Patent: May 11, 1993Assignee: Shell Oil CompanyInventors: Jeffrey G. Southwick, Earle E. Ewins, Jr., David J. St. Clair
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Patent number: 5194500Abstract: An adhesive which contains a tackifying resin and a branched three-armed block copolymer composition comprised of polymeric blocks wherein the molecular weight is from about 180,000 to about 250,000, the polystyrene content is from about 17 to about 23% by weight of the block copolymer composition and the percentage of S-I arms which are load bearing is greater than about 85%.Type: GrantFiled: February 28, 1992Date of Patent: March 16, 1993Assignee: Shell Oil CompanyInventors: Steven S. Chin, David J. St. Clair, Richard L. Talbott
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Patent number: 5104733Abstract: A laminated structure comprising a polybutylene layer and a metal layer bonded together with an adhesive composition comprising an acid functionalized selectively hydrogenated block copolymer having at least one block which is predominantly a monoalkenyl aromatic hydrocarbon polymer block and at least one block which is a hydrogenated conjugated diolefin polymer block.Type: GrantFiled: February 23, 1990Date of Patent: April 14, 1992Assignee: Shell Oil CompanyInventors: Mark L. Kasakevich, Jennifer L. Engle, David J. St. Clair
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Patent number: 4869966Abstract: An encapsulated assemblage and a process for making an encapsulated assemblage comprising:(a) silanizing a substrate thereby forming a silanized substrate;(b) coating said silanized substrate with at least one thin extruded coherent film forming a coated substrate, said film consisting essentially of:(1) about 75 to about 90 parts by weight of a blend of:(a) about 65 to about 75 parts by weight of a selectively hydrogenated two-block polymer wherein one polymer block is designated by A and a second polmer block is designated by B such that prior to hydrogenation,(1) each A is a polymer block of a monovinyl or alpha alkyl monovinyl arene having a number average molecular weight in the range of from about 5,000 to about 75,000, said A blocks comprising from about 10 to about 40% by weight of the total block copolymer, and(2) each B is a polymer block having a number average molecular weight in the range of from about 10,000 to 150,000 and is formed by polymerizing a conjugated diene having from 4 to 10 carbon aType: GrantFiled: May 27, 1988Date of Patent: September 26, 1989Assignee: Shell Oil CompanyInventors: Gay M. Samuelson, David J. St. Clair, Richard L. Danforth
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Patent number: 4835200Abstract: A hot melt adhesive composition possessing color stability and resistance to heat degradation, oxidation and skin formation. The adhesive composition contains a block copolymer prepared using a bromide based coupling agent, a tackifying resin, and an effective amount of a stabilizer composition. The stabilizer composition contains a thio compound, a phenolic antioxidant, a tris-(nonylated phenyl) phosphite, and an aliphatic compatible epoxy compound. Optionally, the adhesive composition may also contain a plasticizer and/or a petroleum derived wax.Type: GrantFiled: December 19, 1986Date of Patent: May 30, 1989Assignee: Shell Oil CompanyInventor: David J. St. Clair
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Patent number: 4783504Abstract: A sealant composition comprising:(a) 100 parts by weight of a silane functionalized polymer component which is prepared by reacting enough silane of the general formula R R'.sub.n SiY.sub.Type: GrantFiled: February 28, 1986Date of Patent: November 8, 1988Assignee: Shell Oil CompanyInventors: David J. St. Clair, Steven S. Chin
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Patent number: 4749430Abstract: An encapsulated assemblage and a process for making comprising:(a) silanizing a substrate;(b) coating the silanized substrate with at least one thin extruded coherent film consisting essentially of:(1) about 75-90 parts by weight of:(a) about 65 to about 75 parts of a selectively hydrogenated two-block polymer (A-B) such that prior to hydrogenation,(1) each A is a polymer block of a monovinyl or alpha alkyl monovinyl arene having a number average molecular weight of 5000 to 75,000 and comprising from about 10 to about 40% by weight of the total block copolymer, and(2) each B is a polymer block having a number average molecular weight of 10,000 to 150,000 and comprising from about 90 to about 60% weight of the total block copolymer, and(b) about 25 to about 35 parts by weight of a selectively hydrogenated multiblock copolymer (A-B) such that:(1) each A is a polymer endblock of a monovinyl or alpha alkyl monovinyl arene having a number average molecular weight of 5,000 to 75,000, said A blocks comprising from aType: GrantFiled: October 16, 1986Date of Patent: June 7, 1988Assignee: Shell Oil CompanyInventors: Gay M. Samuelson, David J. St. Clair, Richard L. Danforth
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Patent number: 4692557Abstract: A solar cell assemblage and method of making, comprising:(a) a pre-treated silanized transparent substrate;(b) a layer of semiconductor material;(c) an electrical contact on the surface of said layer of semiconductor material;(d) an extruded transparent film encapsulating the assemblage which comprises 75 to 91 parts by weight of a blend of:65 to 75 parts by weight of a selectively hydrogenated two-block polymer wherein(1) each A is a polymer block of a monovinyl or alpha alkyl monovinyl arene and the A blocks are from 10 to 40% by weight of the total block copolymer, and(2) each B is a polymer block formed by polymerizing a conjugated diene, and the B blocks are 90 to 60% weight of the total block copolymer, and25 to 35 parts by weight of a selectively hydrogenated multiblock copolymer wherein:(1) each A is a polymer endblock of a monovinyl or alpha alkyl monovinyl arene and the A blocks are 10 to 40% by weight of the total block copolymer, and(2) each B is a polymer midblock is formed by polymerizing a conjType: GrantFiled: October 16, 1986Date of Patent: September 8, 1987Assignee: Shell Oil CompanyInventors: Gay M. Samuelson, David J. St. Clair
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Patent number: 4568713Abstract: Hot melt adhesives with long open time and good cold metal bonding are made of blends of an at least partially crystalline copolymer of butene-1 and ethylene, an aliphatic, substantially non-polar resin, an antioxidizing agent and, optionally, microcrystalline wax.Type: GrantFiled: May 30, 1984Date of Patent: February 4, 1986Assignee: Shell Oil CompanyInventors: David R. Hansen, David J. St. Clair
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Patent number: 4556464Abstract: A cured adhesive composition possessing high cohesive strength at high temperatures along with excellent shear strength and solvent resistance prepared using a block copolymer containing carbon-carbon double bonds in the endblocks which are crosslinked by a crosslinking agent preferentially compatible with the endblock phase.Type: GrantFiled: April 29, 1985Date of Patent: December 3, 1985Assignee: Shell Oil CompanyInventor: David J. St. Clair
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Patent number: 4444953Abstract: A novel block copolymer having particular utility in adhesive compositions has the structure (A-B).sub.x Y(C).sub.z where A is a poly(monoalkenyl) block, B and C are poly(conjugated diene) polymer blocks, Y is the residue of a multifunctional coupling agent, and x plus z is greater than 6. Also disclosed are adhesive compositions containing such block copolymers.Type: GrantFiled: April 18, 1983Date of Patent: April 24, 1984Assignee: Shell Oil CompanyInventor: David J. St. Clair
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Patent number: 4391949Abstract: A novel block copolymer having particular utility in adhesive compositions has the structure (A--B).sub.x Y--C).sub.z where A is a poly(monoalkenyl) block, B and C are poly(conjugated diene) polymer blocks, Y is the residue of a multifunctional coupling agent, and x plus z is greater than 6. Also disclosed are adhesive compositions containing such block copolymers.Type: GrantFiled: November 12, 1981Date of Patent: July 5, 1983Assignee: Shell Oil CompanyInventor: David J. St. Clair
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Patent number: 4296008Abstract: A sealant composition possessing an excellent balance of properties including good tack, low melt viscosity and a cohesive failure mechanism in the 180.degree. peel test comprises a selectively hydrogenated monoalkenyl arene/conjugated diene block copolymer component having certain block molecular weights, tackifying resin, plasticizers and silane coupling agent.Type: GrantFiled: April 21, 1980Date of Patent: October 20, 1981Assignee: Shell Oil CompanyInventors: David J. St. Clair, Earle E. Ewins, Jr.
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Patent number: 4286077Abstract: A weather resistant adhesive composition possessing an excellent balance of properties including good tack and low melt viscosity comprises a selectively hydrogenated monoalkenyl arene/conjugated diene block copolymer component having certain block molecular weights, tackifying resin, and plasticizer.Type: GrantFiled: April 21, 1980Date of Patent: August 25, 1981Assignee: Shell Oil CompanyInventors: David J. St. Clair, Earle E. Ewins