Abstract: A heating chamber (1) for a heating furnace is proposed, with which electrothermal vaporization of impurities from samples can be effected in order to be able to then analyze them spectrometrically. The heating chamber has a wall (3), a sample reception area (5), a nozzle area (7) and two electrical connection areas (9, 11). The heating chamber (1) is specially configured such that an electric current flows through the wall (3) in such a way that a heating capacity caused by it is higher in the nozzle area (7) than in the sample reception area (5).

Abstract: A heating chamber (1) for a heating furnace is proposed, with which electrothermal vaporization of impurities from samples can be effected in order to be able to then analyze them spectrometrically. The heating chamber has a wall (3), a sample reception area (5), a nozzle area (7) and two electrical connection areas (9, 11). The heating chamber (1) is specially configured such that an electric current flows through the wall (3) in such a way that a heating capacity caused by it is higher in the nozzle area (7) than in the sample reception area (5).

Abstract: The invention relates to a method for preparing polyglycerol, comprising —providing a catalyst salt on a support, the catalyst salt having catalytic activity with respect to an etherification reaction of a polyol selected from the group of glycerol and oligoglycerols, —contacting the catalyst salt on the support with a fluid phase comprising a polyol selected from the group of glycerol and oligoglycerols, —and subjecting the polyol in the fluid phase to an etherification reaction in the presence of the catalyst salt, thereby forming the polyglycerol.

Abstract: The invention relates to a method for preparing polyglycerol, comprising —providing a catalyst salt on a support, the catalyst salt having catalytic activity with respect to an etherification reaction of a polyol selected from the group of glycerol and oligoglycerols, —contacting the catalyst salt on the support with a fluid phase comprising a polyol selected from the group of glycerol and oligoglycerols, —and subjecting the polyol in the fluid phase to an etherification reaction in the presence of the catalyst salt, thereby forming the polyglycerol.

Abstract: The invention relates to a method for production of an aqueous dispersion of polymer-encapsulated pigments characterized in that (a) an aqueous pigment dispersion, containing at least one organic pigment (P) at least one surfactant (T), and water is prepared,(b) a monomer miniemulsion stabilized by a hydrophobic organic compound with a water solubility at 20° C. of not more than 5×10?5 g/l, is prepared from a polymerizable monomer (M) and at least one surfactant (T), in water, (c) a monomer pigment emulsion is prepared, whereby the aqueous pigment dispersion from (a) and the monomer miniemulsion from (b) are mixed and homogenized, and (d) the pigment-containing monomer miniemulsion from (c) is polymerized in the presence of a polymerization initiator and/or by heat, whereupon an encapsulation of the pigment with the polymer thus formed occurs.

Abstract: The invention relates to a continuous process for preparing carbon-coated lithium-iron-phosphate particles, wherein the carbon-coated lithium-iron-phosphate particles have a mean (d50) particle size of 10 to 150 nm, and wherein the carbon-coating is an acetylene-black coating, comprising performing in a reactor a flame-spray pyrolysis step (i) in a particle formation zone of the reactor, and a carbon-coating step (ii) in a carbon-coating zone of the reactor, wherein in (i) a combustible organic solution containing a mixture of lithium or a lithium compound; iron or an iron compound; and phosphorus or a phosphorous compound in an organic solvent, is fed through at least one nozzle where said organic solution is dispersed, ignited and combusted, to give a flame spray thereby forming an aerosol of lithium iron phosphate particles; (ii) acetylene gas is injected into said aerosol thereby forming an acetylene-black coating on the lithium iron phosphate particles; (iii) the coated particles are cooled by an iner

Abstract: The invention concerns a process for encapsulating pigment particles, which comprises (A) producing a dispersion of the pigment to be encapsulated, (B) then applying a polyelectrolyte layer to the surface of the pigment particles, (C) further applying a polyelectrolyte layer having opposite charge to (B), and/or adding low molecular weight, multivalent ions oppositely charged to (B), and (D) if appropriate repeating steps (B) and (C), said steps (B), (C) and if appropriate (D) being carried out in the presence of a nonionic surfactant.

Abstract: The invention is about the preparation of novel highly transparent zeolite-doped polymer and zeolites monolayers. External coating of the zeolite crystals by covalently linked functionalized alkoxysilane derivatives allows for an efficient dispersion of the nano zeolite particles into an organic liquid monomer; the following co-polymerisation process leads to a hard, insoluble and transparent material containing said zeolites. Optical properties such as colour, refractive index, Abbe number or photochromism can be fine tuned by simply changing zeolite loading, while transparency is maintained.

Abstract: A mixed crystal of C.I. Pigment Red 170 and one or more of the compounds of the formula (1) wherein X has the definition F, Cl, Br, methyl or nitro. The novel mixed crystals have better light-fastness and weather resistance than unsubstituted C.I. Pigment Red 170.

Abstract: A process for warpage-free pigmentation of a plastic pigmented by a phthalocyanine pigment which was heated to not less than 80° C. as a suspension in a organic solvent in the presence of a carboxylic acid containing 2, 3 or 4 carboxyl groups or a salt of such a carboxylic acid.

Abstract: Dispersible pigment granules are produced by mixing an aqueous suspension of an organic pigment with an aqueous emulsion of a wax-like additive. The aqueous emulsion is then allowed to coagulate and the resulting aqueous dispersion is spray dried.

Abstract: A method for treating phthalocyanine pigments, said method being characterized in that a) a phthalocyanine pigment is suspended in a liquid medium containing aqueous hydrochloric acid and an organic solvent containg carbonyl and/or ether groups, b) the suspension is maintained for between 5 to 300 min at a temperature of from 0° to 150° C. and c) the suspension is then filtered and washed.

Abstract: A method for distortion-free pigmentation of partly-crystalline plastics, characterized in that a phthalocyanine pigment is used which has been heated to a temperature of at least 80° C. as a suspension in an acid-free organic medium in the presence of a base.

Abstract: The invention relates to a compound of general formula (I) in which C represents an alicyclic or heterocyclic group having C2v symmetry, and B represents ortho-C6-C18-arylene. The invention also relates to a method for producing this compound and to the use thereof as a coloring agent for coloring or pigmenting organic or inorganic high-molecular or low-molecular, particularly high-molecular, organic materials.

Abstract: This invention relates to monoazo, disazo and trisazo colorants of the formula (I) where M represents two hydrogen atoms or one metal ion selected from the group consisting of Cu, Co, Ni, Mn, Zn and Al; A is the radical of a substituted naphthyl or pyrazolyl radical.

Abstract: The invention relates to a method for pigmenting semi-crystalline plastics with phthalocyanine pigments in a non-warping manner. Said method is characterised by the use of a phthalocyanine pigment that has been heated as a suspension in an organic solvent in the presence of a dicarboxylic acid or a dixarboxylic acid salt to a temperature of at least 80° C. The invention also relates to a phthalocyanine pigment produced in this way.

Abstract: The present invention relates to the use of wax-coated pigment granules as colorants in electrophotographic toners and developers, powder coating materials, inkjet inks, electret fibers, and color filters, wherein the coated pigment granules have a particle size of between 0.05 and 5 mm and a wax content of from 1 to 50% by weight, based on the overall weight of the coated pigment granules.

Abstract: The invention relates to addition compounds of formula (1): in which: n is a number from 1 to 10; R1 and R2 are identical or different and are each a hydrogen atom or a saturated or unsaturated aliphatic radical having 1 to 4 carbon atoms; R3 and R4 are identical or different and are each a hydrogen atom or alkyl having 1 to 3 carbon atoms, and the bridge member (R3+R4) is in each case positioned ortho or meta in relation to the phenolic oxygen atom; Z represents a group —CH2—CH2—, —CH2—CH(CH3)—, —CH(CH3)—CH2— or a combination thereof; s is number from 1 to 200; B represents hydrogen, —CO—CH?CH—COOM, —COCH(SO3M)CH2COOM, —CO—CH2—CH(SO3M)—COOM, —SO3M, —SO2M and/or —PO3MM, whereby M is preferably a cation selected from the group Li+, Na+, K+, NH4+, HO—CH2—CH2—NH3+, (HO—CH2—CH2—)2NH2+ or (HO—CH2—CH2—)3NH+; and Y is a radical of an amine. The inventive addition compounds are used as dispersing agents of solids, for example, pigments, particularly in aqueous media.

Abstract: Diketopyrrolopyrroles of the formula (I): wherein R1, R2, R3 and R4 independently of one another are a C1–C4 alkyl radical or a substituted or unsubstituted phenyl radical, wherein the phenyl radical can be substituted by 1, 2, 3 or 4 substituents from the group C1–C4 alkyl, C1–C4 alkoxy, CN, F, Cl, Br, NO2, CF3, S—C1–C4 alkyl, phenyl or (C1–C2)alkylenephenyl, with the proviso that at least one of the radicals, R1, R2, R3, or R4, is one of the stated substituted or unsubstituted phenyl radicals.

Abstract: The invention relates to novel monoazo compounds of formula (1), wherein R1 re resents H, Cl or CH3; R2 represents H or Cl; M2+ represents Mg2+, Mn2+ or Sr2+; Y1=represents COO? or SO3?; Y2=SO3?; Y3=Y4=Y5=H; or Y3=SO331 , Y2=Y4=Y5=H; or Y4=SO3?, Y2=Y3=Y5=H; or Y5=SO3?, Y2=Y3=Y4=H. The compounds of formula (1) are characterized by high intensity and light-fastness.