Patents by Inventor Roger J. Hopper
Roger J. Hopper 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: 5405985Abstract: The present invention relates to a process for the production of organosilicon compounds of the formulaZ-Alk-S.sub.n -Alk-Z (I)in which Z is selected from the group consisting of ##STR1## where R.sub.1 is an alkyl group of 1 to 4 carbon atoms, cyclohexyl or phenyl;R.sub.2 is alkoxy of 1 to 8 carbon atoms, or cycloalkoxy of 5 to 8 carbon atoms;Alk is a divalent hydrocarbon of 1 to 18 carbon atoms and n is an integer of 2 to 8; comprising reacting (A) a compound of the formula:Z-Alk-X (II)when X is Cl, Br or I; with (B) a compound of the formulaMe.sub.2 S.sub.n (III)where Me is ammonium, or an alkali metal;wherein the reaction is conducted in the presence of a phase transfer catalyst and an aqueous phase.Type: GrantFiled: July 8, 1994Date of Patent: April 11, 1995Assignee: The Goodyear Tire & Rubber CompanyInventors: Dane K. Parker, Richard T. Musleve, Robert C. Hirst, Roger J. Hopper
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Patent number: 5216066Abstract: A tire tread composition comprises a tread rubber compound containing a sulfonamide modified EPDM terpolymer which imparts improved abrasion resistance, improved ozone resistance, improved hysteresis and the like.Type: GrantFiled: May 1, 1992Date of Patent: June 1, 1993Assignee: The Goodyear Tire & Rubber CompanyInventors: Paul H. Sandstrom, Leland E. Beyersdorff, Roger J. Hopper
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Patent number: 5070150Abstract: The present invention relates to a process for preparing hydroxylated rubber by reacting (a) a rubber having from about 5 to about 75 percent of a 1,2-double bond content with (b) a mercaptan of the formula: ##STR1## wherein n is an integer of from 3 to 19; and wherein the reaction is conducted in the solid state and is catalyzed by a free radical catalyst.Type: GrantFiled: July 2, 1990Date of Patent: December 3, 1991Assignee: The Goodyear Tire & Rubber CompanyInventor: Roger J. Hopper
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Patent number: 4910266Abstract: Chlorothio-sulfonamide modified rubbery terpolymers, such as chlorothio-sulfonamide modified EPDM rubbers, have utility in a variety of applications. For example, such modified rubbers can be utilized in the sidewalls of pneumatic tires. Such modified rubbers are prepared by reacting a terpolymer of ethylene, an .alpha.-olefin containing from 3 to 6 carbon atoms, and a non-conjugated diene containing from 6 to 12 carbon atoms with a N-chlorothio-sulfonamide. The present invention is based upon the unexpected finding that the rate of this reaction can be greatly accelerated by conducting it in the presence of a saturated aliphatic carboxylic acid containing from 6 to 30 carbon atoms, such as stearic acid. The present invention accordingly disclosed in a method of preparing a N-chlorothio-sulfonamide modified terpolymer by reacting a terpolymer of ethylene, an .alpha.Type: GrantFiled: April 10, 1989Date of Patent: March 20, 1990Assignee: The Goodyear Tire & Rubber CompanyInventor: Roger J. Hopper
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Patent number: 4877901Abstract: The present invention relates to a process for synthesizing N,N'-dithiobis(sulfonamides) by reacting a sulfonamide of the formula: ##STR1## with sulfur monochloride and caustic in a mixed organic-aqueous mediua, wherein R.sup.1 and R.sup.2 are independently selected from the group consisting of alkyl radicals having from about 1 to about 20 carbon atoms, cycloalkyl radicals having from about 5 to about 20 carbon atoms, phenyl radicals, alkaryl radicals having from about 7 to 20 carbon atoms, and haloaryl radicals having about 6 to about 10 carbon atoms and where R.sup.1 is also selected from radicals having the formula: ##STR2## wherein R.sup.3 and R.sup.4 are individually selected from said alkyl, cycloalkyl, phenyl, alkaryl and haloaryl radicals and wherein R.sup.3 and R.sup.4 can be joined together to represent radicals selected from --CH.sub.2 --.sub.n, where n is an integer of 4 to 7 and --CH.sub.2).sub.2 O--CH.sub.2 --.sub.2.Type: GrantFiled: October 28, 1988Date of Patent: October 31, 1989Assignee: The Goodyear Tire & Rubber CompanyInventors: Roger J. Hopper, Niranjan V. Shah, Steven M. Ryba
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Patent number: 4820780Abstract: Chlorothio-sulfonamide modified rubbery terpolymers, such as chlorothio-sulfonamide modified EPDM rubbers, have utility in a variety of applications. For example, such modified rubbers can be utilized in the sidewalls of pneumatic tires. Such modified rubbers are prepared by reacting a terpolymer of ethylene, an .alpha.-olefin containing from 3 to 6 carbon atoms, and a non-conjugated diene containing from 6 to 12 carbon atoms with a N-chlorothio-sulfonamide. The present invention is based upon the unexpected finding that the rate of this reaction can be greatly accelerated by conducting it in the presence of a saturated aliphatic carboxylic acid containing from 6 to 30 carbon atoms, such as stearic acid. The present invention accordingly discloses in a method of preparing a N-chlorothio-sulfonamide modified terpolymer by reacting a terpolymer of ethylene, an .alpha.Type: GrantFiled: October 15, 1987Date of Patent: April 11, 1989Assignee: The Goodyear Tire & Rubber CompanyInventor: Roger J. Hopper
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Patent number: 4755608Abstract: There is disclosed a preparation of (optionally substituted) 2,2'-dithiobis(benzothiazole) by the oxidation of 2-mercaptobenzothiazole using bromate salts as the oxidant in an acidified aqueous reaction medium. The process of this invention provides an efficient and practical step in a procedure for the production of 2,2'-dithiobis(benzothiazole) that is virtually pollution free.Type: GrantFiled: November 10, 1986Date of Patent: July 5, 1988Assignee: The Goodyear Tire & Rubber CompanyInventors: Joseph F. Geiser, Roger J. Hopper
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Patent number: 4755607Abstract: There is disclosed a preparation of (optionally substituted) 2,2'-dithiobis(benzothiazole) by the oxidation of 2-mercaptobenzothiazole using bromate salts as the oxidant in an aqueous/alcohol reaction medium. The process of this invention provides an efficient and practical step in a procedure for the production of 2,2'-dithiobis(benzothiazole) that is virtually pollution free.Type: GrantFiled: November 10, 1986Date of Patent: July 5, 1988Assignee: The Goodyear Tire & Rubber CompanyInventors: Joseph F. Geiser, Roger J. Hopper
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Patent number: 4727105Abstract: There is disclosed a compound having the structureA--S--X--S--A' Iwherein A and A' are radicals independently selected from the group consisting of the following structures: ##STR1## wherein R.sub.1 and R.sub.2 are tertiary alkyl radicals having 4 to 8, preferably 4 to 6 carbon atoms, n is a whole number of 1 to 8, R.sub.3 and R.sub.4 are the same or different radicals selected from the group consisting of hydrogen and alkyl radicals having 1 to 18 carbon atoms, R.sub.5 is hydrogen or methyl and Z is --O-- or ##STR2## A' can also be hydrogen; and X is a divalent oligomeric segmer having the structure: ##STR3## wherein m ranges from an average of 4 to about 24. There is also disclosed a polymeric cmposition comprising a polymer susceptible to the degradative effects of oxidation having incorporated therein an antidegradant amount of a compound of Structure I.Type: GrantFiled: January 25, 1985Date of Patent: February 23, 1988Assignee: The Goodyear Tire & Rubber CompanyInventor: Roger J. Hopper
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Patent number: 4714742Abstract: There are disclosed cyanamide derivatives as vulcanization rate modifiers which when added to customary cure packages, accelerate the rate of vulcanization and result in vulcanizates having improved characteristics and age resistance.Type: GrantFiled: October 20, 1986Date of Patent: December 22, 1987Assignee: The Goodyear Tire & Rubber CompanyInventors: Roger J. Hopper, Carl R. Parks
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Patent number: 4374732Abstract: Organo-sulfur impurities are removed from organic or aqueous solutions by contacting said solutions with polymers containing functional groups consisting of metal salts of N-halosulfonamides.Type: GrantFiled: September 30, 1981Date of Patent: February 22, 1983Assignee: The Goodyear Tire & Rubber CompanyInventor: Roger J. Hopper
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Patent number: 4350818Abstract: There is disclosed a novel class of vulcanization accelerators, specifically compounds such as 2-(isopropylsulfinyl)-benzothiazole.Type: GrantFiled: January 14, 1981Date of Patent: September 21, 1982Assignee: The Goodyear Tire & Rubber CompanyInventors: Roger J. Hopper, Budd H. Sturm, Joseph F. Geiser
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Patent number: 4280967Abstract: There is disclosed a novel class of vulcanization accelerators, specifically compounds such as 2-(isopropylsulfinyl)-benzothiazole.Type: GrantFiled: March 20, 1980Date of Patent: July 28, 1981Assignee: The Goodyear Tire & Rubber CompanyInventors: Roger J. Hopper, Budd H. Sturm, Joseph F. Geiser
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Patent number: 4085093Abstract: N-sulfonyl-sulfilimine compounds such as S,S-di(isopropyl)-N-(p-toluenesulfonyl) sulfilimine are used as premature vulcanization inhibitors in polymers compounded for sulfur vulcanization.Type: GrantFiled: July 23, 1976Date of Patent: April 18, 1978Assignee: The Goodyear Tire & Rubber CompanyInventor: Roger J. Hopper
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Patent number: 4017468Abstract: A modified rubbery terpolymer, and blends thereof, which comprises the admixture product of a rubbery terpolymer of ethylene, .alpha.-olefin and non-conjugated diene with at least one compound selected from specific types of N-chlorothiocarboxylic acid amides and imides. The sulfur-cured composites are particularly useful in the sidewall portions of pneumatic tires.Type: GrantFiled: June 30, 1975Date of Patent: April 12, 1977Assignee: The Goodyear Tire & Rubber CompanyInventor: Roger J. Hopper
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Patent number: 3997605Abstract: N-cyclohexyl-formamide is reacted with sulfur monochloride in the presence of an organic hydrogen chloride acceptor to form N,N'-di(cyclohexyl)-N,N'-dithiobis(formamide), which can then be reacted with sulfuryl chloride or chlorine to form N-chlorothio-N-cyclohexyl-formamide which can then be reacted with an olefin to form a retarder having the following structural formula.Type: GrantFiled: May 19, 1975Date of Patent: December 14, 1976Assignee: The Goodyear Tire & Rubber CompanyInventor: Roger J. Hopper
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Patent number: 3970133Abstract: Chlorothio-sulfonamide-modified rubbery terpolymers having a low degree of unsaturation, mixtures of such modified terpolymers with highly unsaturated rubbery polymers and vulcanizates of such mixtures. The vulcanizates are particularly useful in the structure of pneumatic tire sidewalls.Type: GrantFiled: October 17, 1975Date of Patent: July 20, 1976Assignee: The Goodyear Tire & Rubber CompanyInventor: Roger J. Hopper