Patents by Inventor Hugo Camenzind
Hugo Camenzind 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: 7615522Abstract: The present invention relates to a block copolymer prepared by ATRP, wherein the polymer chain terminal group is structurally modified with the functionally effective group of a lubricant or polymer additive selected from the group consisting of antioxidants, metal deactivators, antiwear and extreme pressure additives and corrosion inhibitors. The invention also relates to a composition comprising the structurally modified block copolymer and a composition of matter subject to oxidative, thermal or light induced degradation, such as lubricants or polymers.Type: GrantFiled: April 29, 2003Date of Patent: November 10, 2009Assignee: Ciba Specialty Chemicals CorporationInventors: Hugo Camenzind, Paul Dubs, Peter Hänggi, Roger Martin, Andreas Mühlebach, François Rime
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Publication number: 20090221458Abstract: The invention relates to improved compositions based on lubricants and comprising succinic acid semi-amides and to the use of those lubricant compositions in improving the use properties of lubricants, such as hydraulic or metal-working fluids, greases, gear oils or engine oils.Type: ApplicationFiled: May 12, 2009Publication date: September 3, 2009Inventors: Hugo CAMENZIND, Peter HANGGI
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Publication number: 20080153948Abstract: The present invention discloses a product obtainable by reacting a nano-scaled filler with a compound of the formula I AD-L-RG ??(I) wherein AD is an additive selected from the group of radical scavengers, hydroperoxide decomposers, UV-absorbers, light stabilizers, flame retardants or photoinitiators, L is a spacer, RG is a reactive group, and the nano-scaled filler can be of unmodified or organophilically modified character. These products are for example useful as stabilizers and/or compatibilizers in organic materials, or as photoinitiators in pre-polymeric or pre-crosslinking formulations.Type: ApplicationFiled: November 2, 2007Publication date: June 26, 2008Inventors: Hugo Camenzind, Heinz Herbst, Wiebke Wnderlich
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Publication number: 20060116301Abstract: The invention relates to liquid sulphur-containing antioxidants and to compositions comprising them. The novel lubricant comprise the reaction product of a selected group of 5-tert-butyl-4-hydroxy-3-methyl(or tert-butyl)phenyl substituted carboxylic acid esters with thiodiethylene glycol and a mono-hydroxy alcohol with a carbon chain length higher than 4 C-atoms. The novel lubricant compositions are highly resistant to oxidative degradation and are capable of reducing the negative effects of deposits, such as black sludge, in motor combustion engines, particularly spark ignition internal combustion engines.Type: ApplicationFiled: November 24, 2003Publication date: June 1, 2006Inventors: Hugo Camenzind, Paul Dubs, Roger Martin, David Chasan, Gunnar Demme, James Robbins
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Patent number: 7026438Abstract: The invention relates to liquid sulphur-containing antioxidants and to compositions comprising them. The novel lubricant compositions comprise the reaction product of a selected group of 5-tert-butyl-4-hydroxy-3-methyl(or tert-butyl)phenyl substituted carboxylic acid esters with thiodiethylene glycol and a mono-hydroxy alcohol with a carbon chain length higher than 4 C-atoms. The novel lubricant compositions are highly resistant to oxidative degradation and are capable of reducing the negative effects of deposits, such as black sludge, in motor combustion engines, particularly spark ignition internal combustion engines.Type: GrantFiled: November 26, 2003Date of Patent: April 11, 2006Assignee: Ciba Specialty Chemicals Corp.Inventors: Hugo Camenzind, Paul Dubs, Roger Martin, David Eliezer Chasan, Gunnar Demme, James Robbins
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Publication number: 20050272617Abstract: The present invention relates to a block copolymer prepared by ATRP, wherein the polymer chain terminal group is structurally modified with the functionally effective group of a lubricant or polymer additive selected from the group consisting of antioxidants, metal deactivators, antiwear and extreme pressure additives and corrosion inhibitors. The invention also relates to a composition comprising the structurally modified block copolymer and a composition of matter subject to oxidative, thermal or light induced degradation, such as lubricants or polymers.Type: ApplicationFiled: April 29, 2003Publication date: December 8, 2005Inventors: Hugo Camenzind, Paul Dubs, Peter Hanggi, Roger Martin, Andreas Muhlebach, Francois Rime
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Publication number: 20050267003Abstract: The invention relates to improved compositions based on lubricants and comprising succinic acid semi-amides and to the use of those lubricant compositions in improving the use properties of lubricants, such as hydraulic or metal-working fluids, greases, gear oils or engine oils.Type: ApplicationFiled: September 11, 2003Publication date: December 1, 2005Inventors: Hugo Camenzind, Peter Hanggi
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Publication number: 20040267042Abstract: The invention relates to liquid sulphur-containing antioxidants and to compositions comprising them. The novel lubricant compositions comprise the reaction product of a selected group of 5-tert-butyl-4-hydroxy-3-methyl(or tert-butyl)phenyl substituted carboxylic acid esters with thiodiethylene glycol and a mono-hydroxy alcohol with a carbon chain length higher than 4 C-atoms. The novel lubricant compositions are highly resistant to oxidative degradation and are capable of reducing the negative effects of deposits, such as black sludge, in motor combustion engines, particularly spark ignition internal combustion engines.Type: ApplicationFiled: November 26, 2003Publication date: December 30, 2004Inventors: Hugo Camenzind, Paul Dubs, Roger Martin, David Eliezer Chasan, Gunnar Demme, James Robbins
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Publication number: 20040204521Abstract: The present invention discloses a product obtainable by reacting a nano-scaled filler with a compound of the formula (I): AD-L-RG, wherein AD is an additive selected from the group of radical scavengers, hydroperoxide decomposers, UV-absorbers, light stabilizers, flame retardants or photoinitiators, L is a spacer, RG is a reactive group, and the nano-scaled filler can be of unmodified or organophilically modified character. These products are for example useful as stabilizers and/or compatibilizers in organic materials, or as photoinitiators in pre-polymeric or pre-crosslinking formulations.Type: ApplicationFiled: December 22, 2003Publication date: October 14, 2004Inventors: Hugo Camenzind, Heinz Herbst, Wiebke Wunderlich
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Patent number: 6362138Abstract: This invention relates to compounds which are suitable as ash-free antiwear additives and antioxidants, to lubricant compositions comprising said compounds as well as to their use. are particularly preferred. In the preferred compounds I′, R2 is isooctyloxycarbonylmethyl, R3 is isooctyloxycarbonylmethylthiomethyl and R4 is hydrogen; or R2 is tert-nonyl and R3 is tert-nonylthiomethyl and R4 is hydrogen; or R2 is isooctyloxycarbonylmethyl, R3 is hydrogen and R4 is isooctyloxycarbonylmethylthiomethyl; or R2 is tert-nonyl, R3 is hydrogen and R4 I is tert-nonylthiomethyl.Type: GrantFiled: September 15, 2000Date of Patent: March 26, 2002Assignee: Ciba Specialty Chemicals CorporationInventors: Hugo Camenzind, Samuel Evans, Alfred Dratva, Peter Hänggi
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Patent number: 6255259Abstract: Suitable lubricant additives are the compounds of formulae wherein the substituents and groups have the following preferred meanings: R1=H; R2=methyl or tert-butyl; R3=tert-butyl; s=0, 1 or 2; R4=—A—[(C6H2)(methyl or tert-butyl)(OH)(tert-butyl)]; A=—CH2CH2O—(C═O)—CH2CH2— or —CH2CH(CH3)—O—(C═O)—CH2CH2—.Type: GrantFiled: February 11, 2000Date of Patent: July 3, 2001Assignee: Ciba Specialty Chemicals CorporationInventors: Hugo Camenzind, Alfred Dratva, Peter Hänggi
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Patent number: 6150307Abstract: This invention relates to compounds which are suitable as ash-free antiwear additives and antioxidants, to lubricant compositions comprising said compounds as well as to their use. Compounds of formulae ##STR1## are particularly preferred. In the preferred compounds I',R.sub.2 is isooctyloxycarbonylmethyl, R.sub.3 is isooctyloxycarbonylmethylthiomethyl and R.sub.4 is hydrogen; orR.sub.2 is tert-nonyl and R.sub.3 is tert-nonylthiomethyl and R.sub.4 is hydrogen; orR.sub.2 is isooctyloxycarbonylmethyl, R.sub.3 is hydrogen and R.sub.4 is isooctyloxycarbonylmethylthiomethyl; orR.sub.2 is tert-nonyl, R.sub.3 is hydrogen and R.sub.4 I is tert-nonylthiomethyl.In the preferred compounds II',R.sub.2 and R.sub.2 ' are isooctyloxycarbonylmethyl, R.sub.3 and R.sub.3 ' are isooctyloxycarbonylmethylthiomethyl and R.sub.4 and R.sub.4 ' are hydrogen; orR.sub.2 and R.sub.2 ' are tert-nonyl, R.sub.3 and R.sub.3 ' are tert-nonylthiomethyl and R.sub.4 and R.sub.4 ' are hydrogen; orR.sub.2 and R.sub.Type: GrantFiled: August 3, 1998Date of Patent: November 21, 2000Assignee: Ciba Specialty Chemicals CorporationInventors: Hugo Camenzind, Samuel Evans, Alfred Dratva, Peter Hanggi
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Patent number: 6127327Abstract: Described are products suitable as lubricant and fuel additives which are obtainable by reacting a polyunsaturated polymer, for example polybutadiene, polyisoprene, ring-opening polymerised polycyclooctenamer or polynorbomene, with at least one enophilic compound of the groups of the dihydrocarbyidithiophosphoric acids, dihydrocarbylmonothiophosphoric acids, dihydrocarbylphosphoric acids or mercaptans.Type: GrantFiled: June 24, 1999Date of Patent: October 3, 2000Assignee: Ciba Specialty Chemicals CorporationInventors: Hugo Camenzind, Paul Dubs
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Patent number: 6100406Abstract: Suitable lubricant additives are the compounds of formulae wherein the substituents and groups have the following preferred meanings:R.sub.1 =H; R.sub.2 =methyl or tert-butyl; R.sub.3 =tert-butyl;s=0, 1 or 2;R.sub.4 =--A--[(C.sub.6 H.sub.2)(methyl or tert-butyl)(OH)(tert-butyl)];A=--CH.sub.2 CH.sub.2 O--(C.dbd.O)--CH.sub.2 CH.sub.2 -- or --CH.sub.2 CH(CH.sub.3)--O--(C.dbd.O)--CH.sub.2 CH.sub.2.Type: GrantFiled: July 28, 1998Date of Patent: August 8, 2000Assignee: Ciba Specialty Chemicals CorporationInventors: Hugo Camenzind, Alfred Dratva, Peter Hanggi
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Patent number: 5922657Abstract: A description is given of compositions comprisingA) a lubricant, a metalworking fluid or a hydraulic fluid, in particular a base oil from the group consisting of the mineral, vegetable and synthetic (for example poly-.alpha.-olefin or ester) oils;B) from 0.005 to 1.0% by weight of a compound of the formula ##STR1## in which R.sub.1 and R.sub.2 independently of one another are C.sub.3 -C.sub.18 alkyl, C.sub.5 -C.sub.12 cycloalkyl, C.sub.5 -C.sub.6 cycloalkylmethyl, C.sub.9 -C.sub.10 bicycloalkylmethyl, C.sub.9 -C.sub.10 tricycloalkylmethyl, phenyl or C.sub.7 -C.sub.24 alkylphenyl or together are (CH.sub.3).sub.2 C(CH.sub.2).sub.2, andR.sub.3 is hydrogen or methyl, and, if desired,C) other customary oil additives from the groups consisting of antioxidants, metal passivators, rust inhibitors, dispersants, detergents, viscosity index improvers, pour point depressants, antifoams, solid lubricants and further antiwear additives.Type: GrantFiled: July 15, 1997Date of Patent: July 13, 1999Assignee: Ciba Specialty Chemicals CorporationInventors: Hugo Camenzind, Marc Ribeaud, Michael Fletschinger, Peter Rohrbach
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Patent number: 5726339Abstract: The instant invention relates to novel compounds of formula (II) ##STR1## wherein R, R.sup.2 and x are as defined in the Specification. These compounds retard oxidation of, confer protection under extreme pressures to and reduce frictional wear of lubricants and hydraulic fluids.Type: GrantFiled: March 27, 1996Date of Patent: March 10, 1998Assignee: Ciba Specialty Chemicals CorporationInventors: Hugo Camenzind, Peter Nesvadba
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Patent number: 5663128Abstract: Products are described which can be obtained by reacting components a), b), c) and d), where component a) is a compound of the formula I or a mixture of compounds of the formula I, component b) is a compound of the formula II or a mixture of compounds of the formula II, component c) is a compound of the formula III or a mixture of compounds of the formula III and component d) is a compound of the formula IV or a mixture of compounds of the formula IV, ##STR1## in which the general symbols are as defined in claim 1, the compound of the formula I being, for example, pentaerythritol, thiodiethylene glycol, 1,4-butanediol, 1,2-propanediol, diethylene glycol, triethylene glycol, diethanolamine or glycerol, the compound of the formula II being, for example, sunflower oil or coconut fat, the compound of the formula III being, for example, methyl 3-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionate and the compound of the formula IV, being for example, sulfur or diisopropyl dithiophosphate.Type: GrantFiled: September 19, 1994Date of Patent: September 2, 1997Assignee: Ciba-Geigy CorporationInventors: Samuel Evans, Paul Dubs, Hugo Camenzind
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Patent number: 5629422Abstract: New compounds of the formula I are described which are active, for example, as antioxidants, and also a process for their preparation: ##STR1## R.sub.1 and R.sub.2 are independently of one another C.sub.1 -C.sub.20 alkyl, allyl, methallyl, unsubstituted or C.sub.1 -C.sub.8 alkyl-substituted C.sub.5 -C.sub.12 cycloalkyl, C.sub.5 -C.sub.8 cycloalkenyl, phenyl or C.sub.7 -C.sub.9 phenylalkyl, A is a direct bond, --CH.sub.2 --, --(CH.sub.2).sub.2 -- or --CH.sub.2 --CH(CH.sub.3)--, E is --(CH.sub.2).sub.2 --, --CHR.sub.6 --CH.sub.2 -- or --CH.sub.2 CHR.sub.6 --, n is 1, 2 or 3, R.sub.3 is C.sub.1 -C.sub.18 alkyl or is C.sub.1 -C.sub.18 alkyl which is interrupted by --O-- or --S--, unsubstituted or C.sub.1 -C.sub.8 alkyl-substituted C.sub.5 -C.sub.12 cycloalkyl, phenyl, naphthyl, C.sub.7 -C.sub.9 phenylalkyl, C.sub.7 -C.sub.18 alkylphenyl or is of the formula ##STR2## R.sub.4 is phenyl, naphthyl, C.sub.7 -C.sub.9 phenylalkyl, C.sub.7 -C.sub.18 alkylphenyl or is a radical of the formula ##STR3## or NR.sub.3 R.sub.Type: GrantFiled: November 22, 1994Date of Patent: May 13, 1997Assignee: Ciba Geigy CorporationInventor: Hugo Camenzind
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Patent number: 5629440Abstract: A composition comprisinga) a lubricant or a hydraulic fluid andb) at least one compound of the general formula I ##STR1## in which x=1 or 2 and,if x=1,R is as defined for R.sup.1 or R.sup.3 --O-- or,if x=2,R is as defined for R.sup.8, andR.sup.1 and R.sup.3 are, for example, alkyl, cycloalkyl, alkenyl, phenyl, naphthyl, aralkyl or alkaryl, or alkyl, cycloalkyl, alkenyl, phenyl, naphthyl, aralkyl or alkaryl, which are monosubstituted or polysubstituted by groups from the series comprising halogen, cyano, nitro, e.g. --OCH.sub.3 or e.g. --COOCH.sub.3, or alkyl, cycloalkyl, alkenyl, aralkyl or alkaryl which are interrupted by one or more groups from the series comprising --O--, --S--, --NH--, ##STR2## or alkyl, cycloalkyl, alkenyl, aralkyl or alkaryl which are monosubstituted or polysubstituted by groups from the series comprising halogen, cyano, nitro, e.g. --OCH.sub.3 or e.g. --COOCH.sub.3 and interrupted by one or more groups from the series comprising --O--, --S--, --NH--, ##STR3## and R.sup.2 is NR.sup.4 R.Type: GrantFiled: June 7, 1995Date of Patent: May 13, 1997Assignee: Ciba-Geigy CorporationInventors: Hugo Camenzind, Peter Nesvadba
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Patent number: 5433873Abstract: The invention relates to novel compounds of formula I ##STR1## n is 1 or 2,R and R.sup..cndot. are each independently of the other --OR.sub.1, --SR.sub.2 or --NR.sub.3 R.sub.4,R.sub.1 is hydrogen, C.sub.1 -C.sub.30 alkyl, C.sub.5 -C.sub.7 cycloalkyl, phenyl or naphthyl, phenyl- or naphthyl-substituted C.sub.1 -C.sub.18 alkyl or phenyl or naphthyl which are substituted by C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.12 alkoxy or C.sub.1 -C.sub.12 hydroxyalkyl,R.sub.2 is C.sub.1 -C.sub.30 alkyl, phenyl or naphthyl, phenyl- or naphthyl-substituted C.sub.1 -C.sub.18 alkyl or phenyl or naphthyl which are substituted by C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.12 alkoxy or C.sub.1 -C.sub.12 hydroxyalkyl, or is a radical of formula (CH.sub.2).sub.p --CO--OR.sub.5,p is 1 or 2,R.sub.3 and R.sub.4 have each independently of the other the meanings of R.sub.1, or --NR.sub.3 R.sub.4 is piperidyl, pyrrolidyl or azepyl, andR.sub.5 is hydrogen, C.sub.1 -C.sub.30 alkyl, C.sub.5 -C.sub.Type: GrantFiled: October 21, 1993Date of Patent: July 18, 1995Assignee: Ciba-Geigy CorporationInventor: Hugo Camenzind