Patents by Inventor Siegfried Rosenberger
Siegfried Rosenberger 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: 4954275Abstract: The phenol-mercaptocarboxylic acid esters used for stabilizing elastomers are those of the formula ##STR1## wherein R is C.sub.1 -C.sub.18 alkyl.Type: GrantFiled: November 19, 1986Date of Patent: September 4, 1990Assignee: Ciba-Geigy CorporationInventors: Siegfried Rosenberger, Kurt Schwarzenbach
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Patent number: 4855345Abstract: Compounds of the formula I ##STR1## in which n is 1, 2 or 3, R.sup.1 is C.sub.1 -C.sub.5 -alkyl, cyclohexyl or .alpha.-methylcyclohexyl and, if n is 1, X is a group of the formula II or III ##STR2## in which R.sup.2 and R.sup.3 independently of one another are C.sub.1 -C.sub.8 -alkyl or cyclohexyl, Y is a direct bond, --S--, >S.dbd.O or a radical --CR.sup.4 R.sup.5 -- in which R.sup.4 is hydrogen, C.sub.1 -C.sub.8 -alkyl, C.sub.5 -C.sub.8 -cycloalkyl, phenyl or benzyl and R.sup.5 is hydrogen or C.sub.1 -C.sub.8 -alkyl, and Z is 1,2-alkylene or 1,3-alkylene having not more than 15 carbon atoms or o-phenylene, and, if n is 2, X is a group of the formula IV or V ##STR3## in which R.sup.6 is methyl or ethyl, and, if n is 3, X is a phosphorus atom, are suitable for stabilizing organic material against light-induced and/or thermo-oxidative degradation.Type: GrantFiled: June 10, 1987Date of Patent: August 8, 1989Assignee: Ciba-Geigy CorporationInventors: Siegfried Rosenberger, Hans-Rudolf Meier
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Patent number: 4623745Abstract: Compounds of the formula I ##STR1## wherein R.sup.1 and R.sup.2 independently of one another are each tert-butyl, R.sup.3 is C.sub.1 -C.sub.20 -alkyl, or C.sub.2 -C.sub.20 -alkyl interrupted by --O-- or --S--, and n is the number 1 or 2, can be obtained, with a very high degree of yield and purity, by reaction of a phenol of the formula II ##STR2## with formaldehyde and a mercaptan of the formula IIIR.sup.3 OOC--C.sub.n H.sub.2n --SH (III)in the presence of catalytic amounts of a primary or secondary amine. Such compounds are stabilizers for organic materials.Type: GrantFiled: July 16, 1985Date of Patent: November 18, 1986Assignee: Ciba-Geigy CorporationInventors: Siegfried Rosenberger, Werner Stegmann
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Patent number: 4612131Abstract: Compounds of formula I ##STR1## where R.sub.1 and R.sub.2 independently are alpha-branched alkyl of 3 to 8 carbon atoms, R.sub.3 is hydrogen, R.sub.4 is ethylene, 1,3-propylene or 1,4-butylene, and n is 2 or 4 are effective stabilizers for protecting elastomeric or acrylonitrile copolymer compositions or lubricating oil compositions against thermal oxidation and discoloration. 2-Mercaptoethyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate is particularly useful.Type: GrantFiled: March 21, 1985Date of Patent: September 16, 1986Assignee: Ciba-Geigy CorporationInventor: Siegfried Rosenberger
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Patent number: 4532286Abstract: Compounds of formula I ##STR1## where R.sub.1 and R.sub.2 independently are alpha-branched alkyl of 3 to 8 carbon atoms, R.sub.3 is hydrogen, R.sub.4 is ethylene, 1,3-propylene or 1,4-butylene, and n is 2 or 4 are effective stabilizers for protecting elastomeric or acrylonitrile copolymer compositions or lubricating oil compositions against thermal oxidation and discoloration. 2-Mercaptoethyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate is particularly useful.Type: GrantFiled: November 3, 1983Date of Patent: July 30, 1985Assignee: Ciba-Geigy CorporationInventor: Siegfried Rosenberger
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Patent number: 4532059Abstract: Compounds of the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are as defined in the main claim, are suitable for use as stabilizers for organic material, such as polymers or lubricants. In addition to high activity, they are distinguished, in particular, by good color behavior and good compatibility with the substrates to be protected.Type: GrantFiled: November 17, 1983Date of Patent: July 30, 1985Assignee: Ciba-Geigy CorporationInventor: Siegfried Rosenberger
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Patent number: 4513109Abstract: The invention relates to phenols which contain a number of aromatic nuclei and in which the bridge formation of these nuclei is in the meta-position to the OH groups. These phenols have the formula I, wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are as defined in claim 1.The novel phenols are most suitable for use as stabilizers for organic polymers and lubricants and have particularly good color properties.Type: GrantFiled: January 27, 1984Date of Patent: April 23, 1985Assignee: Ciba-Geigy CorporationInventor: Siegfried Rosenberger
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Patent number: 4507420Abstract: The invention relates to phenols which contain a number of aromatic nuclei and in which the bridge formation of these nuclei is in the meta-position to the OH groups. These phenols have the formula I, ##STR1## or ##STR2## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, A and n are as defined in claim 1.The novel phenols are most suitable for use as stabilizers for organic polymers and lubricants and have particularly good color properties.Type: GrantFiled: February 1, 1984Date of Patent: March 26, 1985Assignee: Ciba-Geigy CorporationInventor: Siegfried Rosenberger
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Patent number: 4439615Abstract: Compounds of the formula V ##STR1## wherein R.sup.2 is straight-chain or branched alkyl of 1 to 8 carbon atoms, cycloalkyl, aryl, alkaryl or aralkyl, L is a bivalent radical, for example --SCH.sub.2 CO.O(CH.sub.2 CH.sub.2 S).sub.y --CH.sub.2 CH.sub.2 -- or --O.COC.sub.p H.sub.2p -- wherein y is a number from 1 to 3 and p is a number from 1 to 18.Type: GrantFiled: July 19, 1982Date of Patent: March 27, 1984Assignee: Ciba-Geigy CorporationInventors: Siegfried Rosenberger, Samuel Evans, Bernard Gilg
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Patent number: 4417071Abstract: A process for the manufacture of phenols of the formula I ##STR1## wherein R.sub.1 is alkyl of 1 to 18 carbon atoms, cycloalkyl, phenyl, aralkyl or chlorine, R.sub.2 is hydrogen or has the same meaning as R.sub.1, R.sub.3 is hydrogen or alkyl of 1 to 12 carbon atoms, R.sub.4 is alkylene of 2 to 18 carbon atoms which is unsubstituted or substituted by aryl or hydroxyl, and n is an integer from 0 to 4, which process comprises transesterifying a compound of the formula II ##STR2## wherein R.sub.1, R.sub.2 and R.sub.3 are as defined for formula (I) and R.sub.5 is alkyl of 1 to 4 carbon atoms with a mercapto alcohol of the formulaHO--R.sub.4 --SHwherein R.sub.4 is as defined for formula (I), in the presence of a catalyst of the formula (R.sub.6 O).sub.4 M, wherein R.sub.6 represents alkyl radicals of 1 to 18 carbon atoms which can be the same or different, aryl or alkaryl, and M is an element selected from the group consisting of Ti, Ge, Zr, Sn or V.Type: GrantFiled: March 11, 1982Date of Patent: November 22, 1983Assignee: Ciba-Geigy CorporationInventor: Siegfried Rosenberger
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Patent number: 4390735Abstract: A process for the preparation of a p-allylphenol of the formula I, which comprises reacting a phenol of the formula II with an allyl halide of the formula III ##STR1## in which the symbols R.sub.1 to R.sub.6 and X are as defined in the description, in the presence of a base and a phase transfer catalyst.p-Allylphenols are valuable intermediates and lubricant additives.Type: GrantFiled: October 13, 1981Date of Patent: June 28, 1983Assignee: Ciba-Geigy CorporationInventor: Siegfried Rosenberger
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Patent number: 4349445Abstract: Compounds of the formula ##STR1## wherein the symbols R.sub.1 to R.sub.9 have the meanings given in claim 1, are suitable as extreme pressure and antiwear additives in lubricants. The compounds contain as radicals R.sub.5 or R.sub.7 a group of the formula ##STR2## wherein R.sub.10 and R.sub.11 have the meanings given in claim 1. The compounds according to the invention are characterized also as good antioxidants and anti-corrosion agents.Type: GrantFiled: September 15, 1980Date of Patent: September 14, 1982Assignee: Ciba-Geigy CorporationInventor: Siegfried Rosenberger
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Patent number: 4322303Abstract: Compounds of the formula ##STR1## wherein the symbols R.sub.1, R.sub.2, R.sub.3, m, X, n, Y, q, r and Z have the meanings given in Claim 1. The divalent radical Y can optionally contain a group of the formula ##STR2## wherein R.sub.9 and R.sub.10 have the meanings given in Claim 1. The compounds according to the invention are suitable as antioxidant-stabilizers in organic materials, and impart to lubricants, in addition to having therein a good anti-oxidation and anti-corrosion action, excellent extreme pressure and antiwear properties.Type: GrantFiled: September 10, 1980Date of Patent: March 30, 1982Assignee: Ciba-Geigy CorporationInventor: Siegfried Rosenberger
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Patent number: 4297492Abstract: Novel oligomeric and polymeric phenolic 1,3,5-triazines, for example those of the formula ##STR1## their preparation and their use for stabilizing organic material and also the organic material protected against oxidative and light-induced degradation with the aid of these compounds.Type: GrantFiled: March 10, 1980Date of Patent: October 27, 1981Assignee: Ciba-Geigy CorporationInventors: Michael Rasberger, Siegfried Rosenberger, Samuel Evans
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Patent number: 4246198Abstract: A phenol of the formulae I, II or III ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 are independent of one another and one of these is C.sub.1 -C.sub.12 -alkyl, C.sub.5 -C.sub.6 -cycloalkyl or C.sub.7 -C.sub.9 -aralkyl and the others are hydrogen, C.sub.1 -C.sub.12 -alkyl or C.sub.5 -C.sub.6 -cycloalkyl, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 are independent of one another and one of these is C.sub.1 -C.sub.12 -alkyl or C.sub.5 -C.sub.6 -cycloalkyl and the others are hydrogen, C.sub.1 -C.sub.12 -alkyl or C.sub.5 -C.sub.6 cycloalkyl, or R.sub.4 and R.sub.5, or R.sub.6 and R.sub.7, together with the C atom which links them, form a 5-12-membered ring, R.sub.8, R.sub.9 and R.sub.10 are independent of one another and one of these is C.sub.1 -C.sub.12 -alkyl, C.sub.5 -C.sub.6 -cycloalkyl or C.sub.7 -C.sub.9 -aralkyl and the others are hydrogen, C.sub.1 -C.sub.12 -alkyl or C.sub.5 -C.sub.Type: GrantFiled: May 10, 1979Date of Patent: January 20, 1981Assignee: Ciba-Geigy CorporationInventors: Siegfried Rosenberger, Andreas Schmidt
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Patent number: 4225450Abstract: Esters of phenol-dithiocarbamic acids when added even in very small amounts to lubricants are effective as stabilizers against oxidation and corrosion, and also as extreme-pressure additives and anti-wear additives.Type: GrantFiled: July 13, 1978Date of Patent: September 30, 1980Assignee: Ciba-Geigy CorporationInventor: Siegfried Rosenberger
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Patent number: 4220571Abstract: Polyolefins are outstandingly protected against thermooxidative degradation by the use of aliphatic substituted ureas, especially together with phenolic antioxidants, and good color characteristics are observed.Type: GrantFiled: October 11, 1978Date of Patent: September 2, 1980Assignee: Ciba-Geigy CorporationInventor: Siegfried Rosenberger
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Patent number: 4197236Abstract: Compounds of the general formula I ##STR1## or their acid addition salts in which one of R.sub.1 and R.sub.3 is --OH and the other is hydrogen and R.sub.2 denotes C.sub.1 -C.sub.12 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl, C.sub.6 -C.sub.10 -aryl or C.sub.7 -C.sub.9 -aralkyl and R.sub.4 and R.sub.5 are hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl, C.sub.6 -C.sub.10 -aryl or C.sub.7 -C.sub.9 -aralkyl and R.sub.6 denotes hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl, phenyl or benzyl and R.sub.7 is hydrogen or C.sub.1 -C.sub.8 -alkyl and R.sub.8 is hydrogen, oxyl, C.sub.1 -C.sub.12 -alkyl, C.sub.3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.4 -alkinyl, C.sub.2 -C.sub.21 -alkoxyalkyl, C.sub.7 -C.sub.8 -aralkyl, 2,3-epoxypropyl, an aliphatic acyl group with 1-4 C atoms or one of the groups --CH.sub.2 COOR.sub.9, --CH.sub.2 --CH(R.sub.10)--OR.sub.11, --COOR.sub.12 or -- CONHR.sub.12, in which R.sub.9 is C.sub.1 -C.sub.12 -alkyl, C.sub.3 -C.sub.6 -alkenyl, phenyl, C.sub.7 -C.sub.Type: GrantFiled: August 7, 1978Date of Patent: April 8, 1980Assignee: Ciba-Geigy CorporationInventors: Siegfried Rosenberger, Samuel Evans
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Patent number: 4146531Abstract: Compounds of the formula I ##STR1## wherein A is alkylidene or optionally alkylated vinylene, B is a group of the formula II ##STR2## wherein R.sub.1 and R.sub.2 are alkyl, R.sub.3, R.sub.4 and R.sub.5 are hydrogen or alkyl and n is 0, 1 or 2 and m is 1 or 2, and X is identical to B if m equals 1 or X is methylene if m equals 2, as stabilizers for organic material.Type: GrantFiled: January 9, 1978Date of Patent: March 27, 1979Assignee: Ciba-Geigy CorporationInventors: Siegfried Rosenberger, Andreas Schmidt
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Patent number: 4076690Abstract: 3,5-Dialkyl-4-hydroxyphenylphosphonates or 3,5-dialkyl-4-hydroxyphenylalkylphosphonates are converted into the corresponding 3-halogeno-5-alkyl derivatives by means of a novel process by reacting them with a halogen or a halogenating agent. These compounds are outstanding stabilizers for protecting organic materials against degradation induced by heat and oxygen.Type: GrantFiled: March 4, 1976Date of Patent: February 28, 1978Assignee: Ciba-Geigy CorporationInventor: Siegfried Rosenberger