Patents by Inventor Lajos Avar
Lajos Avar 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: 8277689Abstract: The invention relates to combinations of benzylidene-bis-malonate based lightsstabilizers with specific other additives showing synergistic efficiency during long term light exposure of organic substrates.Type: GrantFiled: August 27, 2007Date of Patent: October 2, 2012Assignee: Clariant Finance (BVI) LimitedInventors: Lajos Avar, Christoph Kroehnke
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Publication number: 20090194743Abstract: The invention relates to combinations of benzylidene-bis-malonate based lightsstabilizers with specific other additives showing synergistic efficiency during long term light exposure of organic substrates.Type: ApplicationFiled: August 27, 2007Publication date: August 6, 2009Applicant: CLARIANT FINANCE (BVI) LIMITEDInventors: Lajos Avar, Christoph Kröhnke
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Patent number: 7332535Abstract: A stabilizer mixture for one or more compounds of the general formula (1) and (1A) but preferably (1), wherein the groups R independently stand for an alkyl-, cycloalkyl-, aralkyl- or aryl-rest whereas the aromatic ring system may be optionally substituted by one or more groups R? which may be identical or different and which groups R? can be an aryl-, a saturated or unsaturated alkyl-, aralkyl- or cycloalkyl-group as well as halogen, an amino-, aminoalkyl-, aminocycloalkyl-, cyano-, thiocyano- or nitrogroup. and a UV-absorber, hindered amine stabilizer, sterically hindered phenol, organophosphite, organophosphonite, organophosphine, or mixtures thereof. The present invention is useful in the protection of various polymeric substrates against the damaging influence of light exposure by the long term storage of polymers. This effect can be observed especially in so-called engineering plastics (such as, for example, PC, PET, PBT, ABS, TPU).Type: GrantFiled: June 8, 2006Date of Patent: February 19, 2008Assignee: Clariant Finance (BVI) LimitedInventors: Christoph Kröhnke, Joseph R. Webster, Ernst Gronmaier, Lajos Avar
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Publication number: 20060226395Abstract: A stabilizer mixture for one or more compounds of the general formula (1) and (1A) but preferably (1), wherein the groups R independently stand for an alkyl-, cycloalkyl-, aralkyl- or aryl-rest whereas the aromatic ring system may be optionally substituted by one or more groups R? which may be identical or different and which groups R? can be an aryl-, a saturated or unsaturated alkyl-, aralkyl- or cycloalkyl-group as well as halogen, an amino-, aminoalkyl-, aminocycloalkyl-, cyano-, thiocyano- or nitrogroup. and a UV-absorber, hindered amine stabilizer, sterically hindered phenol, organophosphite, organophosphonite, organophosphine, or mixtures thereof. The present invention is useful in the protection of various polymeric substrates against the damaging influence of light exposure by the long term storage of polymers. This effect can be observed especially in so-called engineering plastics (such as, for example, PC, PET, PBT, ABS, TPU).Type: ApplicationFiled: June 8, 2006Publication date: October 12, 2006Inventors: Christoph Krohnke, Joseph Webster, Ernst Gronmaier, Lajos Avar
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Patent number: 7081213Abstract: A stabilizer mixture for one or more compounds of the general formula (1) and (1A) but preferably (1), wherein the groups R independently stand for an alkyl-, cycloalkyl-, aralkyl- or aryl-rest whereas the aromatic ring system may be optionally substituted by one or more groups R? which may be identical or different and which groups R? can be an aryl-, a saturated or unsaturated alkyl-, aralkyl- or cycloalkyl-group as well as halogen, an amino-, aminoalkyl-, aminocycloalkyl-, cyano-, thiocyano- or nitrogroup. and a UV-absorber, hindered amine stabilizer, sterically hindered phenol, organophosphite, organophosphonite, organophosphine, or mixtures thereof. The present invention is useful in the protection of various polymeric substrates against the damaging influence of light exposure by the long term storage of polymers. This effect can be observed especially in so-called engineering plastics (such as, for example, PC, PET, PBT, ABS, TPU).Type: GrantFiled: May 14, 2002Date of Patent: July 25, 2006Assignee: Clariant Finance (BVI) LimitedInventors: Christoph Krōhnke, Joseph R. Webster, Ernst Gronmaier, Lajos Avar
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Publication number: 20040122125Abstract: The invention relates to the novel use of known lactone compounds of the formula (I) 1Type: ApplicationFiled: January 21, 2004Publication date: June 24, 2004Inventors: Lajos Avar, Rene Bar, Victor Sanahuja
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Publication number: 20030234386Abstract: A stabilizer mixture for one or more compounds of the general formula (1) 1Type: ApplicationFiled: May 14, 2002Publication date: December 25, 2003Applicant: Clariant International, Ltd.Inventors: Christoph Krohnke, Joseph R. Webster, Ernst Gronmaier, Lajos Avar
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Patent number: 6441244Abstract: The invention relates to new compounds of the formula (I) in which R is phenyl, C1-4alkyl-, C1-4alkoxy- or halogen-substituted phenyl, naphthyl or an aromatic ring containing heteroatoms; X is O or S; R1 and R2 are each a methyl radical or R1 and R2 together are a C4-8alkylene radical; Y is hydroxyl, C1-12alkoxy, C1-4alkylamino, di-C1-4alkylamino or a piperidine or morpholine ring that is attached by its nitrogen atom; to a process for preparing them and to their use as photoinitiators and/or photosensitizers.Type: GrantFiled: July 12, 2001Date of Patent: August 27, 2002Assignee: Clariant Finance (BVI) LimitedInventors: Lajos Avar, René Bär, Victor Sanahuja
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Patent number: 6201047Abstract: The invention relates to the use of piperidine compounds of the formula I in which R1 is hydroxyl, lower alkyl, lower alkoxy, R2 is a substituted or unsubstituted, mono- or bicyclic radical of aromatic type, R3 is oxygen, —NH— or —N(C1-4-alkyl)- and R8 independently at each occurrence is hydrogen or methyl for preparing light-stabilized, EPDM-modified polypropylene which is employed in particular in automotive construction, such as for shock absorbers, cover strips and the like. A further subject of the invention is the combination of abovementioned piperidine compounds with known UV absorbers. The invention also relates to EPDM-modified polypropylene which contains from 0.05 to 2.5% by weight, preferably from 0.1 to 0.6% by weight, of a radical of a compound of the above formula I, and to products produced therefrom.Type: GrantFiled: February 17, 1998Date of Patent: March 13, 2001Assignee: Clariant Fianance (BVI) LimitedInventors: Lajos Avar, Andreas Thuermer, Gilbert Ligner
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Patent number: 6153676Abstract: The subject matter of the invention is the use of certain piperidine compounds of formula I ##STR1## optionally in combination with an oxalanide UV absorber for the stabilization of pigmented or unpigmented polyolefins against the negative consequences of UV radiation. The invention also relates to compositions comprising a piperidine compound of formula I, a polyolefin, and an oxalanide UV absorber and compositions comprising a compound of formula I and a second HALS compound.Type: GrantFiled: August 2, 1999Date of Patent: November 28, 2000Assignee: Clariant Finance (BVI) LimitedInventors: Lajos Avar, Gilbert Ligner, Joseph R. Webster
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Patent number: 5821288Abstract: A coating composition comprisinga) a film-forming materialb) a stabilizing effective amount of a light stabilizing composition which comprises a blend of at least one diphenyloxamine of the formula ##STR1## where R.sub.1 is hydrogen, alkyl, alkoxy or halogen;R.sub.2 is hydrogen, alkyl, alkoxy, halogen, phenyl or phenoxy; andR.sub.3 and R.sub.4 are hydrogen, alkyl or alkoxy and at least one selected tetraalkylpiperidine.In a preferred embodiment, a benzotriazole is also present in the light stabilizing composition.The coating compositions are especially useful for the automotive market.The invention further relates to a method for enhancing the light stability of coatings comprising adding to the solids content of the coating composition a stabilizing quantity of the above-mentioned light stabilizing composition. The invention also relates to the corresponding stabilized coating film.Type: GrantFiled: June 7, 1996Date of Patent: October 13, 1998Assignee: Clariant Finance (BVI) LimitedInventors: Lajos Avar, Roland Joseph Valin
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Patent number: 5705545Abstract: A compound of formula I for use in stabilizing polymeric material against effects such as light and heat ##STR1## in which R is hydrogen; oxygen; --OH; C.sub.1-24 alkyl; --O--CO--C.sub.1-24 alkyl; --O--CO--C.sub.1-24 alkyl; --O--CO-phenyl or --COR.sub.5 ; where R.sub.5 is --C(R.sub.3).dbd.CH.sub.2, C.sub.1-6 alkyl, phenyl, CO--C.sub.1-24 alkyl, --CO--phenyl, --NR.sub.7 R.sub.8, --CH.sub.2 --C.sub.6 H.sub.5, --CO--OC.sub.1-12 alkyl or --COOH; where R.sub.3 is hydrogen or C.sub.1-4 alkyl; R.sub.7 is hydrogen, C.sub.1-12 alkyl, C.sub.5-6 cycloalkyl, phenyl, phenyl-C.sub.1-4 alkyl or C.sub.1-12 alkylphenyl and R.sub.8 is C.sub.1-12 alkyl or hydrogen,each R.sub.1, independently, is --CH.sub.3 or --CH.sub.2 (C.sub.1-4 alkyl) or both groups R.sub.1 form a group --(CH.sub.2).sub.5 --; andeach R.sub.2, independently, is --CH.sub.3 or --CH.sub.2 (C.sub.1-4 alkyl) or both groups R.sub.2 form a group --(CH.sub.2).sub.5 --.A is --O-- or --N(C.sub.1-4 alkyl)-- or --NH--R.sub.9 is hydrogen or methyl, andR.sub.Type: GrantFiled: October 20, 1995Date of Patent: January 6, 1998Assignee: Clariant Finance (BVI) LimitedInventors: Lajos Avar, Gilbert Ligner
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Patent number: 5616636Abstract: A composition comprising:a) a compound containing a phosphite or phosphonite group and at least one 2,2,6,6-tetraalkylpiperidinyl group, andb) a polyolefin which has been produced in the presence of a catalyst which is eitheri) a supported Zeigler catalyst orii) a metallocene catalyst,from which polyolefin the catalyst has not been removed.Type: GrantFiled: February 27, 1995Date of Patent: April 1, 1997Assignee: Sandoz Ltd.Inventors: Lajos Avar, Peter Staniek, Klaus Stoll, Wolf D. Habicher, Uwe Hahner
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Patent number: 5569539Abstract: New powder coatings or powder coating compositions comprisingA) a binder systemB) specific powder coating additivesC) at least one compound of formula I ##STR1## in which R.sub.1 is methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl or tert-butyl and optionallyD) additional compounds selected from the group consisting of antioxidants, UV-stabilizers, UV-absorbers, acid scavengers, radical scavengers, pigments, dyes, UV-quenchers, processing stabilizers, fillers, and tribocharging additivesexibit advantages during their production. Compounds according to formula I can be used as UV-absorbers and can be incorporated even in greater amounts and dispersed homogeneously at the manufacture of the powder coating compositions in an extruder. It is a further advantage of these compounds that they do not volatilize during stoving of the coatings.Type: GrantFiled: January 12, 1995Date of Patent: October 29, 1996Assignee: Sandoz Ltd.Inventors: Lajos Avar, Karl Bechtold, Rainer Wolf
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Patent number: 5489632Abstract: Novel imino ether compounds, processes for their production and methods for their use are provided. These novel imino ether compounds are particularly useful as light stabilizers for polymeric compositions, particularly for lacquer coating compositions.Type: GrantFiled: July 28, 1993Date of Patent: February 6, 1996Assignee: Sandoz Ltd.Inventor: Lajos Avar
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Patent number: 5306823Abstract: Novel compounds according to formula I ##STR1## are disclosed, as well as processes for their production and methods for their use.These compounds are useful as light stabilizers for polymeric materials, particularly in acid catalyzed stoving finishes such as those encountered in the top coat of two layer metallic finishes.Type: GrantFiled: February 14, 1992Date of Patent: April 26, 1994Assignee: Sandoz Ltd.Inventor: Lajos Avar
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Patent number: 4921893Abstract: both R.sub.1 's are CH.sub.3 or together form --CH.sub.2).sub.5 ;both R.sub.2 's are CH.sub.3 or together form --CH.sub.2).sub.5 ;R.sub.3 has a significance of R, independently of R, except for oxygen;X is --O--, --NH-- or ##STR2## m is an integer from 1 to 4 inclusive; R.sub.4 is a saturated or unsaturated aliphatic group unsubstituted or substituted by one or two groups selected from --OH and C.sub.1-4 alkoxy and which can be interrupted by an oxygen or sulphur atom; or an aromatic group unsubstituted or substituted by one or two groups selected from --OH, C.sub.1-4 alkyl and C.sub.1-4 alkoxy are useful as U.V. light stabilizers in polymeric organic compounds.Type: GrantFiled: December 3, 1987Date of Patent: May 1, 1990Assignee: Sandoz Ltd.Inventor: Lajos Avar
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Patent number: 4920169Abstract: A compound of formula I ##STR1## in which each R.sub.1, independently is selected from hydrogen, C.sub.1-12 alkyl, C.sub.1-12 alkoxy and halogen;R.sub.2 has a significance of R.sub.1, independently of R.sub.1, or is --OH;R.sub.20 is --CO--OR.sub.6 or, when each R.sub.1 is hydrogen and R.sub.2 is 2-C.sub.1-4 alkoxy, R.sub.20 is additionally --OH;R.sub.3 is hydrogen or methyl (more preferably hydrogen); andR.sub.6 is hydrogen; unsubstituted C.sub.6-22 alkyl, uninterrupted or interrupted by 1 or 2 oxygen atoms or C.sub.1-22 alkyl mono- or di-substituted by OH and uninterrupted or interrupted by 1 or 2 oxygen atoms;provided when each RF.sub.1 and R.sub.2 is hydrogen, then R.sub.6 is not hydrogen.Type: GrantFiled: May 26, 1989Date of Patent: April 24, 1990Assignee: Sandoz Ltd.Inventor: Lajos Avar
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Patent number: 4916175Abstract: Compounds are provided which are useful as light stabilizers for polymeric materials and which have the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.4 are organic radicals, R.sub.3 and R.sub.15 are hydrogen or organic radicals and R is hydrogen, oxygen or an organic radical.Type: GrantFiled: November 5, 1987Date of Patent: April 10, 1990Assignee: Sandoz Ltd.Inventor: Lajos Avar
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Patent number: 4891396Abstract: A compound of formula I ##STR1## in which R.sub.1 is selected from C.sub.9-32 alkyl, C.sub.9-32 alkenyl, C.sub.9-32 alkoxy, --CO--R.sub.4 and --(CH.sub.2).sub.1-6 --COOC.sub.6-18 alkyl, where R.sub.4 is C.sub.8-31 alkyl, C.sub.8-31 alkenyl or C.sub.8-31 alkoxy; the alkyl group of each significance of R.sub.1 being uninterrupted or interrupted by one --O--, --S-- --SO.sub.2 -- group and being unsubstituted or substituted by --N(R.sub.5).sub.2, OH or halogen, where each R.sub.5, independently, is selected from hydrogen, C.sub.1-6 alkyl, C.sub.2-6 alkenyl and C.sub.1-6 alkoxy;R.sub.2 has a significance of R.sub.1 independently, of R.sub.1 or is --COOH hydrogen, hydroxyC.sub.1-6 alkyl, hydroxyC.sub.1-6 alkoxy, --COOC.sub.1-6 alkyl, OCOC.sub.1-6 alkoxy; Cl, Br, I, OH, C.sub.1-8 alkyl, C.sub.1-8 alkoxy or C.sub.2-8 alkenyl; andR.sub.3 is C.sub.1-6 alkyl, Cl, Br, I, OH, COOH, hydroxyC.sub.1-6 alkyl, C.sub.2-6 alkenyl, hydroxyC.sub.1-6 alkoxy, COOC.sub.1-6 alkyl, --OCOC.sub.1-6 alkoxy or C.sub.Type: GrantFiled: August 26, 1988Date of Patent: January 2, 1990Assignee: Sandoz Ltd.Inventors: Lajos Avar, Helmut Bohnke