Patents by Inventor Reto Luisoli
Reto Luisoli 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: 8128842Abstract: The invention relates to the preparation of an antistatic composition comprising adding a liquid or a dissolved ionic substance to a porous polymer and processing the porous polymer together with further additives and further thermoplastic polymers in the melt. The invention relates also to the antistatic composition itself and to its use for rendering polymers antistatic.Type: GrantFiled: August 24, 2007Date of Patent: March 6, 2012Assignee: BASF SE LudwigshafenInventors: Ernst Minder, Reto Luisoli, Hugo Gross
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Publication number: 20090242845Abstract: The invention relates to the preparation of an antistatic composition comprising adding a liquid or a dissolved ionic substance to a porous polymer and processing the porous polymer together with further additives and further thermoplastic polymers in the melt. The invention relates also to the antistatic composition itself and to its use for rendering polymers antistatic.Type: ApplicationFiled: August 24, 2007Publication date: October 1, 2009Inventors: Ernst Minder, Reto Luisoli, Hugo Gross
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Patent number: 6365781Abstract: There is disclosed an improved process for the preparation of a compound of the formula I wherein n is 0 or 1, R1 is C1-C12alkyl or —CH2SR3, R2 is C1-C12alkyl, C7-C9phenylalkyl, C7-C9-phenylalkyl substituted on the phenyl radical by from 1 to 3 C1-C4alkyl groups; or —CH2SR3, R3 is C6-C18alkyl, phenyl or benzyl, R4 is hydrogen or methyl, R5 is hydrogen or methyl, with the proviso that R4 and R5 are not simultaneously methyl, by reacting a compound of the formula II wherein n, R4 and R5 are as previously defined, R11 is hydrogen or C1-C12alkyl; and R12 is hydrogen, C1-C12alkyl, C7-C9phenylalkyl, C7-C9phenylalkyl substituted on the phenyl radical by from 1 to 3 C1-C4alkyl groups; with formaldehyde or a compound that liberates formaldehyde under the reaction conditions and with at least one compound of the formula III R3SH (III) wherein R3 is as previously defined, in the presence of a base, said base being mono- or dimethylamine or mono- or diethylaminType: GrantFiled: January 5, 2001Date of Patent: April 2, 2002Assignee: Ciba Specialty Chemicals CorporationInventors: Fabio Pizzoli, Reto Luisoli, Gerrit Knobloch, Hans-Rudolf Meier
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Publication number: 20010020116Abstract: There is disclosed an improved process for the preparation of a compound of the formula I 1Type: ApplicationFiled: January 5, 2001Publication date: September 6, 2001Inventors: Fabio Pizzoli, Reto Luisoli, Gerrit Knobloch, Hans-Rudolf Meier
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Patent number: 6191182Abstract: A novel process for the preparation of compounds of formula I by aminolysis of a p-halophenyl alkyl ketone of formula II with a cyclic amine of formula III in water at a temperature of at least 130° C., in which formulae X is a halogen atom and R1, R2 and R3 are as claimed in claim 1, as well as the novel compounds of formula I and their use for the preparation of photoinitiators for the photopolymerisation of ethylenically unsaturated compounds.Type: GrantFiled: June 10, 1999Date of Patent: February 20, 2001Assignee: Ciba Specialty Chemcials CorporationInventors: Rinaldo Hüsler, Rudolf Schwabe, Reto Luisoli
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Patent number: 5977357Abstract: A novel process for the preparation of compounds of formula I ##STR1## by aminolysis of a p-halophenyl alkyl ketone of formula II ##STR2## with a cyclic amine of formula III ##STR3## in water at a temperature of at least 130.degree. C., in which formulae X is a halogen atom and R.sub.1, R.sub.2 and R.sub.3 are as claimed in claim 1, as well as the novel compounds of formula I and their use for the preparation of photoinitiators for the photopolymerisation of ethylenically unsaturated compounds.Type: GrantFiled: June 1, 1998Date of Patent: November 2, 1999Assignee: Ciba Specialty Chemical CorporationInventors: Rinaldo Husler, Rudolf Schwabe, Reto Luisoli
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Patent number: 5795985Abstract: A novel process for the preparation of compounds of formula I ##STR1## by aminolysis of a p-halophenyl alkyl ketone of formula II ##STR2## with a cyclic amine of formula III ##STR3## in water at a temperature of at least 130.degree. C., in which formulae X is a halogen atom and R.sub.1, R.sub.2 and R.sub.3 are as claimed in claim 1, as well as the novel compounds of formula I and their use for the preparation of photoinitiators for the photopolymerisation of ethylenically unsaturated compounds.Type: GrantFiled: April 21, 1997Date of Patent: August 18, 1998Assignee: Ciba Specialty Chemicals CorporationInventors: Rinaldo Husler, Rudolf Schwabe, Reto Luisoli
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Patent number: 5258540Abstract: Compounds of formula Ia ##STR1## in which R.sub.1 is hydrogen, R.sub.2 is methyl, tert-butyl or cyclohexyl, and R.sub.7 and R.sub.8 independently of one another are C.sub.1 -C.sub.18 alkyl, phenyl or C.sub.7 -C.sub.18 alkylphenyl are novel compounds having utility as stabilizers.Type: GrantFiled: July 20, 1992Date of Patent: November 2, 1993Assignee: Ciba-Geigy CorporationInventors: Paul Dubs, Werner Stegmann, Reto Luisoli, Roger Martin
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Patent number: 5240975Abstract: Liquid substituted 2H-benzotriazole mixtures are prepared by alkylation with concomitant dealkylation, fragmentation and realkylation of 2-(2-hydroxy-5-alkylphenyl)-2H-benzotriazoles or of 2-(2-hydroxy-3,5-dialkylphenyl)-2H-benzotriazoles with straight or branched alkenes of 8 to 30 carbon atoms in the presence of an acid catalyst at 100.degree.-200.degree. C. The liquid mixtures exhibit outstanding efficacy in protecting organic substrates from light induced deterioration as well as good resistance to loss by volatilization or exudation during the processing of stabilized compositions at elevated temperatures.Type: GrantFiled: December 4, 1991Date of Patent: August 31, 1993Assignee: Ciba-Geigy CorporationInventors: Roland A. E. Winter, Robert E. Detlefsen, Werner Stegmann, Reto Luisoli, David Leppard
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Patent number: 5229521Abstract: Compounds of formula ##STR1## wherein R.sub.1 is hydrogen alkyl, alkoxy, phenyl, phenylaklyl or halogen, and R.sub.2 is alkyl phenyl, phenylaklyl or cycloalkyl, are prepared by reacting a compound of formula ##STR2## with a compound of formula ##STR3## wherein R.sub.3 and R.sub.4 are alkyl, and formaldehyde, in a one-pot process in the absence of a solvent.Type: GrantFiled: October 23, 1992Date of Patent: July 20, 1993Assignee: Ciba-Geigy CorporationInventors: Reto Luisoli, Werner Stegmann
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Patent number: 5157141Abstract: A process for the preparation of compounds of the general formula I ##STR1## in which R.sub.1 is hydrogen or methyl, R.sub.2 and R.sub.3 independently of one another are C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.8 cycloalkyl, phenyl, C.sub.7 -C.sub.9 phenylalkyl or halogen, R.sub.2 is additionally hydrogen and R.sub.7 and R.sub.8 independently of one another are C.sub.1 -C.sub.18 alkyl, phenyl or C.sub.7 -C.sub.18 alkylphenyl, which comprises reacting a phenol of the formula II ##STR2## in which R.sub.1 to R.sub.3 have the meaning described above, with formaldehyde or paraformaldehyde, an amine of the formula IIINR.sub.4 R.sub.5 R.sub.6 IIIin which R.sub.4 is C.sub.1 -C.sub.4 alkyl and R.sub.5 and R.sub.6 independently of one another are hydrogen or C.sub.1 -C.sub.4 alkyl, and a phosphite of the formula IV ##STR3## in which R.sub.7 and R.sub.8 have the meaning described above and R.sub.9 has the meaning given for R.sub.7 and R.sub.8, at a temperature of 0.degree.-200.degree. C.Type: GrantFiled: November 21, 1990Date of Patent: October 20, 1992Assignee: Ciba-Geigy CorporationInventors: Paul Dubs, Werner Stegmann, Reto Luisoli, Roger Martin
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Patent number: 5110978Abstract: A process for the preparation of compounds of formula I ##STR1## by reacting a phenol with formaldehyde and a thiol of formula HS--C.sub.n H.sub.2n --COO--R.sub.3 under excess pressure and in the presence of dimethylamine.The symbols R.sub.1 and R.sub.2 are independently alkyl, R.sub.3 is alkyl or alkyl interrupted by --O-- or --S--, and n is 1 or 2.Type: GrantFiled: December 21, 1990Date of Patent: May 5, 1992Assignee: Ciba-Geigy CorporationInventors: Werner Stegmann, Reto Luisoli
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Patent number: 5095062Abstract: Liquid substituted, 2H-benzotriazole mixtures are prepared by alkylation with concomitant dealkylation, fragmentation and realkylation of 2-(2-hydroxy-5-alkylphenyl)-2H-benzotriazoles or of 2-(2-hydroxy-3,5-dialkylphenyl)-2H-benzotriazoles with straight or branched alkenes of 8 to 30 carbon atoms in the presence of an acid catalyst at 100.degree.-200.degree. C. The liquid mixtures exhibit outstanding efficacy in protecting organic substrates from light induced deterioration as well as good resistance to loss by volatilization or exudation during the processing of stabilized compositions at elevated temperatures.Type: GrantFiled: September 5, 1990Date of Patent: March 10, 1992Assignee: Ciba-Geigy CorporationInventors: Roland A. E. Winter, Robert E. Detiefsen, Werner Stegmann, Reto Luisoli, David Leppard
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Patent number: 4973701Abstract: Liquid substituted 2H-benzotriazole mixtures are prepared by alkylation with concomitant dealkylation, fragmentation and realkylation of 2-(2-hydroxy-5-alkylphenyl)-2H-benzotriazoles or of 2-(2-hydroxy-3,5-dialkylphenyl)-2H-benzotriazoles with straight or branched alkenes of 8 to 30 carbon atoms in the presence of an acid catalyst at 100.degree.-200.degree. C. The liquid mixtures exhibit outstanding efficacy in protecting organic substrates from light induced deterioration as well as good resistance to loss by volatilization or exudation during the processing of stabilized compositions at elevated temperatures.Type: GrantFiled: April 11, 1988Date of Patent: November 27, 1990Assignee: Ciba-Geigy CorporationInventors: Roland A. E. Winter, Werner Stegmann, Reto Luisoli, David Leppard, Roland A. E. Winter, Robert E. Detlefsen
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Patent number: 4921966Abstract: A process for the preparation of a mixture of 2-(2-hydroxyphenyl)benzotriazole which is liquid at room temperature by alkylating 2-(2-hydroxy-5-methylphenyl)benzotriazole with a C.sub.8 -C.sub.14 .alpha.-olefin in the melt at elevated temperature, in the presence of sulfonic acid as catalyst, comprising using not less than 0.5 mol of the acid catalyst and 1.5-3 mol of .alpha.-olefin per mol of 2-(2-hydroxy-5-methylphenyl)benzotriazole, carrying out the alkylation in the temperature range from 165.degree. to 190.degree. C., separating the crude product phase upper phase) from the sulfonic acid phase, and working up said crude product phase by distillation by means of a thin-film evaporator, a thin-film evaporator fitted with a distillation column, or a short path distillation apparatus.Type: GrantFiled: December 14, 1988Date of Patent: May 1, 1990Assignee: Ciba-Geigy CorporationInventors: Werner Stegmann, Reto Luisoli
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Patent number: 4874885Abstract: There is disclosed a process for the preparation of compounds of formula I or II ##STR1## from phenols by reaction with formaldehyde and mercaptans in the presence of mono-, di- or trimethylamine or mono- or diethylamine.The symbols R.sub.1 is alkyl, hydroxy or alkoxycarbonyl substituted alkyl; alkyl; aryl, cycloalkyl or aralkyl, R.sub.2 is hydrogen, alkyl, alkenyl or halogen, R.sub.3 and R.sub.4 are independently alkyl, allyl, cycloalkyl, phenyl, benzyl, halogen or --CH.sub.2 --S--R.sub.1, Z.sub.1 is --S-- or alkylene, and Z.sub.2 is hydrogen, alkyl or --CH.sub.2 --S--R.sub.1.The mercaptomethylphenols are valuable antioxidants for plastics, elastomers, mineral oils and synthetic lubricants.Type: GrantFiled: December 15, 1987Date of Patent: October 17, 1989Assignee: Ciba-Geigy CorporationInventors: Werner Stegmann, Hans R. Meier, Samuel Evans, Roger Martin, Reto Luisoli