Abstract: The invention relates to a process of using certain piperidine compounds of formula I ##STR1## in which R.sub.1 is hydrogen, hydroxyl, lower alkyl, lower alkoxy or acyl,R.sub.2 is a substituted or unsubstituted mono- or bicyclic radical which is aromatic in type,R.sub.3 is oxygen, --NH-- or --N(C.sub.1-4 -alkyl)-- andR.sub.8 independently at each occurrence is hydrogen or methylfor stabilizing natural or synthetic, organic or inorganic pigments or pigment mixtures in natural or synthetic, polymeric or prepolymeric substrates against the adverse effects of heat and/or light on the light fastness and color stability, respectively, especially against alterations in shade or light-induced bleaching. The invention also relates to a masterbatch composition.
Type:
Grant
Filed:
February 17, 1998
Date of Patent:
October 3, 2000
Assignee:
Clariant Finance (BVI) Limited
Inventors:
Klaus Stoll, Andreas Thuermer, Gilbert Ligner, Joseph Reni Webster
Abstract: C.I. Pigment Yellow 155 is used as a colorant in electrophotographic toners and developers, powder coating materials, inkjet inks, color filters and electret materials.
Type:
Grant
Filed:
October 1, 1998
Date of Patent:
September 12, 2000
Assignee:
Clariant GmbH
Inventors:
Hans-Tobias Macholdt, Ruediger Baur, Josef Ritter
Abstract: The present invention relates to an antistatic mixture comprising compounds of the formulae (I) and (II)R'--N--[(C.sub.n H.sub.2n)--OH].sub.2 (I) ##STR1## where n is 2 or 3R.sup.1 is C.sub.8 -C.sub.22 -alkyl or -alkenyl or C.sub.8 -C.sub.22 -alkyl-CO-- andR.sup.2, R.sup.3 and R.sup.4 may be identical or different and are C.sub.8 -C.sub.22 -alkyl or -alkenyl and two of these radicals may be hydrogen,and where the mixing ratio of the compounds of formulae I and II is from 4:1 to 1:10 parts by weight,and to a process for preparing this mixture.This mixture is solid and is therefore easy to use in production, and is storage-stable and offers advantages in handling.
Abstract: An intaglio ink for printing illustrations comprises C.I. Pigment Yellow 139 and further, preferably chlorine-free organic yellow pigments and has good rheological and coloristic properties which are comparable with those of conventional intaglio printing inks based on C.I. Pigment Yellow 12.
Type:
Grant
Filed:
March 16, 1998
Date of Patent:
August 29, 2000
Assignee:
Clariant GmbH
Inventors:
Rainer Winter, Ibrahim Zidan, Ulrich Ott, Alexander Sieber
Abstract: The present invention relates to the use of polyolefin waxes synthesized by means of metallocene catalysts for the preparation of solvent-containing pastes. The pastes prepared in this way have a significantly higher paste hardness and an improved heat stability.
Abstract: The invention relates to the use of mixtures of one or more phosphoric esters of the formula (I) with one or more amines of the formula (II) as extreme pressure additives in water-immiscible cooling lubricants ##STR1## in which the substituents have the meaning defined in the description.
Type:
Grant
Filed:
March 11, 1998
Date of Patent:
August 15, 2000
Assignee:
Clariant GmbH
Inventors:
Peter Pyka, Barbara Vollnhals, Bernd Pomrehn
Abstract: Cyclosaccharide-boron complexes consisting of 1 to 4 cyclodextrin units and one borate radical of the formula (I): ##STR1## have good charge control properties and lend themselves excellently to dispersion in toner, powder coating and electret binders.
Abstract: The present invention relates to a method of using polyolefin waxes prepared by means of metallocene catalysts as additive components in printing inks and surface coatings.
Abstract: Inter-polyelectrolyte complexes (IPECs) are employed as charge control agents and charge improvers in electrophotographic toners and developers, in triboelectrically or electrokinetically sprayable powders and powder coating materials and in electret materials.
Type:
Grant
Filed:
July 30, 1998
Date of Patent:
February 29, 2000
Assignee:
Clariant GmbH
Inventors:
Eduard Michel, Ruediger Baur, Hans-Tobias Macholdt
Abstract: The invention relates to colorant compositions consisting essentially of one or more cholesteric liquid-crystalline polymers and at least one colorant which absorbs light in the visible wavelength range. Suitable colorants are organic or inorganic pigments or dyes. Coatings comprising such colorant compositions feature color effects which are dependent on the viewing angle and which cannot be obtained by means of absorption pigments alone or by means of cLCP effect coatings.
Type:
Grant
Filed:
October 16, 1997
Date of Patent:
January 25, 2000
Assignee:
Clariant GmbH
Inventors:
Axel Schonfeld, Erwin Dietz, Bernd Dewald
Abstract: The invention relates to a process for preparing alkali metal salts and/or alkaline earth metal salts of alkylphosphonous acids and dialkylphosphinic acids from elemental yellow phosphorus and alkyl halides, which comprises carrying out the reaction in the presence of aqueous alkali metal hydroxide or alkaline earth metal hydroxide or mixtures thereof. The invention likewise relates to the use of the compounds prepared by the process according to the invention for preparing flame retardants, extraction media and plant protection agents.
Abstract: Mixed crystal pigments of the quinacridone series New quinacridone mixed crystal pigments consisting ofa) from 85 to 99% by weight of unsubstituted .beta.-phase quinacridone of the formula (I) ##STR1## in which R.sup.1 and R.sup.2 are hydrogen atoms and b) from 1 to 15% by weight of one or more substituted quinacridones of the formula (I) in which the substituents R.sup.1 and R.sup.2 are identical or different and are chlorine, bromine or fluorine atoms or C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy or carboxamido groups which can be substituted by C.sub.1 -C.sub.6 -alkyl groups, and R.sup.1 may additionally be hydrogen, are valuable quinacridones in the red-violet range.
Type:
Grant
Filed:
July 31, 1998
Date of Patent:
November 23, 1999
Assignee:
Clariant GmbH
Inventors:
Manfred Urban, Martin Boehmer, Dieter Schnaitmann
Abstract: 4,4'-Dimethyl-6,6'-dichlorothioindigo is obtained in the stable crystal modification I, distinguished by the fraction angles (2 theta):lines of high intensity: 25.99; 27.26lines of moderate intensity: 10.27; 12.48; 22.39; 23.91; 24.82; 28.87,by oxidizing 3-hydroxy-4-methyl-6-chlorothionaphthene having a mean particle size of at most 20 .mu.m.
Type:
Grant
Filed:
January 20, 1999
Date of Patent:
November 9, 1999
Assignee:
Clariant GmbH
Inventors:
Wolfgang Bauer, Uwe Baeumler, Hans Kurz, Hans-Peter Kreutzer
Abstract: A composition, suitable for stabilizing a polymeric composition against the effects of light, comprisinga) an N-acylated 2,2,6,6-tetraalkylpiperidinyl group (hereinafter N-acylated HALS) containing compound; andb) an N-oxy-subst. 2,2,6,6-tetraalkylpiperidinyl group (hereinafter N-oxy-substituted HALS) containing compound.A further aspect of the invention relates to a composition, suitable for stabilizing a polymeric composition against the effects of light, comprisinga) an N-acylated 2,2,6,6-tetraalkylpiperidinyl-group-containing compound in which a spiro group is attached in the 4-position (hereinafter defined as component i); andb) an N-acylated 2,2,6,6-tetraalkylpiperidinyl-group-containing compound in which in the 4-position no spiro group is present (hereinafter defined as component ii).These compounds are suitable as light stabilizers in acid catalyzed lacquer system.
Type:
Grant
Filed:
March 30, 1995
Date of Patent:
November 2, 1999
Assignee:
Clariant Finance (BVI) Limited
Inventors:
Karl Bechtold, Gilbert Ligner, Rainer Wolf
Abstract: The present invention relates to novel stabilizers of the formula (I) ##STR1## in which the substituents have the meaning defined in the description. These novel stabilizers are particularly suitable for stabilizing organic material, such as plastics, oils, paints and coatings, against degradation by light, radiation, heat and oxygen.
Type:
Grant
Filed:
October 7, 1997
Date of Patent:
October 26, 1999
Assignee:
Clariant GmbH
Inventors:
Thomas Stahrfeldt, Josef Wiedemann, Matthias Zah
Abstract: The invention relates to a process for preparing dialkylphosphinate salts, which comprisesa) reacting elemental yellow phosphorus with alkyl halides in the presence of alkali metal hydroxide or alkaline earth metal hydroxide to form a mixture which comprises as main constituents the salts of alkylphosphonous, phosphorous and hypophosphorous acids,b) adjusting the mixture to a pH below 7 and then reacting the mixture with olefins in the presence of a free-radical initiator andc) reacting the dialkylphosphinic acids obtained according to b) and/or alkali metal salts thereof with metal compounds of Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na and/or K to give the metal dialkylphosphinate salts.The invention likewise relates to the use of the metal dialkylphosphinate salts prepared by the process according to the invention to prepare flame retardants.
Abstract: The disclosure pertains to an intimate molecular mixture of polyester with an effective amount of compound (A) ##STR1## where n=2 and at least one R.sup.4 group represents a sterically hindered amine group adjacent to the carbonyl, and preferably each R.sup.4 group is a hindered amino group.Exemplary R.sup.
Abstract: Novel pigment formulations which comprise at least one organic pigment selected from the class consisting of perylene, perinone, quinacridone, azo, benzimidazolone, anthraquinone or anthanthrone pigments and at least one pigment-dispersing agent of the formula (I) ##STR1## have improved rheological and coloristic properties, in particular in aqueous and nonaqueous coating systems.
Type:
Grant
Filed:
March 9, 1998
Date of Patent:
September 28, 1999
Assignee:
Clariant GmbH
Inventors:
Manfred Urban, Dieter Schnaitmann, Margit Haberlick
Abstract: The present invention relates to the use of surfactants for improving the drying properties of hydrophilic, highly swellable hydrogels in the course of drying with the aid of contact dryers.
Type:
Grant
Filed:
January 17, 1997
Date of Patent:
August 31, 1999
Assignee:
BASF Corporation
Inventors:
Thomas Daniel, Norbert Herfert, Gustav Remmel, Ulrich Riegel, Uwe Stuven, Fritz Engelhardt
Abstract: The present invention relates to a process for the preparation of dioxazine derivatives of the formula I ##STR1## in which R.sup.1 is hydrogen or (C.sub.1 -C.sub.8)-alkyl, by ring closure of a compound of the formula II ##STR2## in the presence of a ring-closure agent, wherein the ring-closure agent used is an N-hetarene N-oxide. The compounds of the formula I are used for producing valuable dyes and pigments.
Type:
Grant
Filed:
October 16, 1997
Date of Patent:
August 3, 1999
Assignee:
Clariant GmbH
Inventors:
Gert Nagl, Wolfgang Bauer, Manfred Urban, Dieter Schnaitmann