Patents by Inventor Egon Liedek
Egon Liedek 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: 5496403Abstract: Inorganic oxide pigments (ceramics) are prepared by mixing the starting materials in the presence of water and in the presence or absence of assistants, drying and subsequent calcining in a rotary furnace by processing the starting materials in the presence of water into a pumpable suspension having particle sizes of 50%<10 .mu.m and 100%<50 .mu.m, dewatering the suspension by spray drying it to leave porous granules, and calcining those granules>97% from 20 to 800 .mu.m in size.Type: GrantFiled: August 23, 1990Date of Patent: March 5, 1996Assignee: BASF Lacke + Farben AktiengesellschaftInventors: Harald Gaedcke, Guenter Etzrodt, Egon Liedek
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Patent number: 5273577Abstract: An essentially monoclinic bismuth vanadate of the formula Bi[V.sub.1-x P.sub.x)O.sub.4 ] where x is from 0 to 0.1 has a chroma of .gtoreq.85, a lightness of .gtoreq.80, a hue angle of from 89 to 95 and a photochromism with a .DELTA.E value of .ltoreq.2 under the CIELAB system.Type: GrantFiled: December 30, 1992Date of Patent: December 28, 1993Assignee: BASF AktiengesellschaftInventors: Egon Liedek, Helmut Knittel, Hans-Ulrich Reisacher, Norbert Mronga, Harald Ochmann, Henning Wienand
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Patent number: 4999134Abstract: Novel zinc salts, lead salts and/or calcium salts of carboxylic acids of the general formula ##STR1## where A is a radical of the formula ##STR2## Y is --CO-- or --SO.sub.2 --, X.sup.1 is C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -alkoxy or halogen, X.sup.2 is hydrogen, C.sub.1 -C.sub.8 -alkyl or halogen, X.sup.3 is hydrogen, nitro or halogen, m and n are each 1 or 2, and X.sup.1 may furthermore be hydrogen if A is a radical of the formula (III) or X.sup.3 is nitro or m is 2, in particular the basic salts of (I), are suitable as corrosion inhibitors for coating systems.Type: GrantFiled: September 23, 1988Date of Patent: March 12, 1991Assignee: BASF AktiengesellschaftInventors: Egon Liedek, Gerhard Haegele
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Patent number: 4981489Abstract: Disazo compounds based on 4,4'-diaminodiphenyl compounds contain not less than 50% by weight of a disazo compound of the general formulaA--N.dbd.N--Z--N.dbd.N--B (I)where Z is a radical of an unsubstituted or symmetrically substituted diphenylene, A is a radical of a coupling component of a 1-phenylpyrazolone or of an acetoacetarylide, where the phenyl and the aryl radical is subtsituted by sulfo or carboxyl groups, and B is a radical of a coupling component based on 1-phenylpyrazolone or acetoacetarylide, which are free of sulfo and/or carboxyl groups.The disazo compounds can be obtained by coupling the tetrazotized diamine H.sub.2 N--Z--NH.sub.2 to the coupling component AH containing an acidic group in a medium containing a mineral acid, and then coupling the product to BH in a buffered medium (pH about 4).The novel disazo compounds are suitable as additives to pigments, in particular azo and disazo pigments, for improving the transparency and heat stability of the pigment particles, and the flow behavior.Type: GrantFiled: October 23, 1989Date of Patent: January 1, 1991Assignee: BASF Lacke & Farben AktiengesellschaftInventors: Wolfgang Ruff, Egon Liedek, Gerhard Berger, Hans W. Sonneborn
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Patent number: 4894094Abstract: Disazo compounds based on 4,4'-diaminodiphenyl compounds contain not less than 50% by weight of a disazo compound of the general formulaA--N.dbd.N--Z--N.dbd.N--B (I)where Z is a radical of an unsubstituted of symmetrically substituted diphenylene, A is a radical of a coupling component of a 1-phenylpyrazolone or of an acetoacetarylide, where the phenyl and the aryl radical is substituted by sulfo or carboxyl groups, and B is a radical of a coupling component based on 1-phenylpyrazolone or acetoacetarylide, which are free of sulfo and/or carboxyl groups.The disazo compounds can be obtained by coupling the tetrazotized diamine H.sub.2 N--Z--NH.sub.2 to the coupling component AH containing an acidic group in a medium containing a mineral acid, and then coupling the product to BH in a buffered medium (pH about 4).The novel disazo compounds are suitable as additives to pigments, in particular azo and disazo pigments, for improving the transparency and heat stability of the pigment particles, and the flow behavior.Type: GrantFiled: August 19, 1987Date of Patent: January 16, 1990Assignee: Basf Lacke & Farben AktiengesellschaftInventors: Wolfgang Ruff, Egon Liedek, Gerhard Berger, Hans W. Sonneborn
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Patent number: 4844741Abstract: Thermostable rutile mixed phase pigments of the ternary system titanium, antimony and chromium contain from 0.1 to 2.0% by weight of magnesium.Type: GrantFiled: April 20, 1988Date of Patent: July 4, 1989Assignee: Lacke & Farben AktiengesellschaftInventors: Helmut Knittel, Roland Bauer, Egon Liedek, Guenter Etzrodt
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Patent number: 4830775Abstract: Novel zinc, lead or zinc/lead salts of carboxylic acids of the formula ##STR1## where Y is --CO-- or --SO.sub.2 --, X is H or --NO.sub.2 and n is 1 or 2. The salts, in particular the basic salts of (I), are useful corrosion-inhibitors for coating systems, especially for aqueous or water-dilutable systems.Type: GrantFiled: May 11, 1987Date of Patent: May 16, 1989Assignee: BASF Lacke .+-. Farben AktiengesellschaftInventors: Egon Liedek, Gerhard Haegele
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Patent number: 4720304Abstract: Novel formulations which contain (a) one or more azo pigments based on coupling products of aromatic monoamines or 4,4'-diaminodiphenyls with acetoacetarylides, 1-arylpyrazolones, 3-hydroxy-2-naphthoic acid derivatives or .beta.-naphthol and (b) one or more dyes of the formulaQ--(X).sub.nwhere F is an n-valent radical of a monoazo dye, of a disazo dye or of a quinophthalone, n is 1, 2, 3 or 4 and X is a group of the formula ##STR1## where R.sup.1 and R.sup.2 are each hydrogen or C.sub.1 -C.sub.4 -alkyl, R.sup.3 is C.sub.1 -C.sub.4 -alkyl or hydroxy-C.sub.2 -C.sub.4 -alkyl and A.sup..crclbar. is one equivalent of an anion.The pigments present in the formulations exhibit improved tinctorial, rheological and printing properties when the formulations are used in printing inks.Type: GrantFiled: September 19, 1985Date of Patent: January 19, 1988Assignee: BASF Farben+Fasern AktiengesellschaftInventors: Wolfgang Ruff, Egon Liedek, Gerhard Berger, Hans W. Sonneborn
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Patent number: 4609726Abstract: Compounds of the general formula I ##STR1## where R is hydrogen or C.sub.1 -C.sub.6 -alkyl and X is chlorine or bromine, with the proviso that X is only bromine when R is H, possess pigment properties and are distinguished by high color strength, brilliance and very good fastness properties.Type: GrantFiled: March 14, 1984Date of Patent: September 2, 1986Assignee: BASF AktiengesellschaftInventors: Reinhard Kemper, Egon Liedek
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Patent number: 4602960Abstract: A novel modified diarylide pigment contains (a) a pigment which is composed of a tetrazotized benzidine, coupled to an acetoacetarylide and/or a 1-phenyl-3-methylpyrazole-5-one, and (b) a water-soluble component obtained from a symmetric or asymmetric coupling product of a tetrazotized 4,4'-diamino-2,2'-stilbenedisulfonic acid and an acetoacetarylide and/or a 1-phenyl-3-methyl-5-pyrazolone. The novel pigments possess very good color strength, very good gloss characteristics and very good transparency, and exhibit improved printing characteristics, particularly in offset printing inks.Type: GrantFiled: August 16, 1984Date of Patent: July 29, 1986Assignee: BASF Farben & Fasern AktiengesellschaftInventors: Egon Liedek, Wolfgang Ruff, Gerhard Berger, Hans W. Sonneborn, Reinhard Kemper
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Patent number: 4530725Abstract: Thermally stable lead chromate pigments or pigments containing lead chromate, which have high color strength and are provided with a precipitated coating containing silicon dioxide, are prepared by a process in which an aqueous pigment suspension is mixed once or several times with an aqueous MgSiF.sub.6 solution, the pH being maintained at 4.5-9.5 and the temperature at 50.degree.-95.degree. C., and the pigment is then separated off and worked up, these steps being carried out in a conventional manner.Type: GrantFiled: June 28, 1984Date of Patent: July 23, 1985Assignees: BASF Farben, Fasern AktiengesellschaftInventors: Werner Ostertag, Peter Dimroth, Henning Wienand, Egon Liedek, Helmut Knittel, Gunter Etzrodt
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Patent number: 4222788Abstract: Mixed pigments containing an organic pigment component and an inorganic pigment component imparting improved gloss and other desirable properties to organic coatings containing the same in relatively large amounts are prepared by synthesizing the organic component in the presence of the inorganic component in a liquid medium inert to the inorganic component, such as nickel titanium yellow or chromium titanium yellow.Type: GrantFiled: January 23, 1979Date of Patent: September 16, 1980Assignee: BASF Farben & Fasern AGInventors: Egon Liedek, Peter Dimroth, Wolfgang Ruff, Gerhard Berger, Peter Reiter
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Patent number: 4052378Abstract: The azo dye of the formula ##STR1## is a brilliantly red pigment which imparts lightfast and migration resistant color to printing inks, plastics, and the like.Type: GrantFiled: January 21, 1976Date of Patent: October 4, 1977Assignee: BASF Farben + Fasern AGInventors: Leonhard Heckl, Egon Liedek, Wolfgang Ruff