Abstract: The invention relates to a process for preparing pigments, which comprises subjecting a crude pigment or mixture of crude pigments and a crystalline inorganic salt or mixture of crystalline inorganic salts together, essentially in the absence of other constituents, to the action of a rotor having a tangential speed of at least 10 m/s, so that a temperature of at least 80° C. is attained by means of friction effects; and subsequently kneading the product of this treatment with an organic liquid, during which it is possible if desired to add additional substances selected from the group consisting of inorganic salts, inert additives and colorant. These pigments and their use in polymers, printing inks and colours filters are also claimed. The invention in particular relates to a novel pigment form of Pigment Violet 23 obtained by above-mentioned process and having higher colour strength and colour saturation as well as excellent other applications properties in particular in printing inks.

Abstract: This invention relates to 1,4-diketopyrrolo[3,4c]-pyrrole pigments of the formula characterized by desirable color properties and novel visible absorbance spectra with a steep slope on the bathochromic side of the absorption maximum in the range of from 500 to 650 nm.

Abstract: Compounds of formula Ia, Ib and Ic, (Ic), in which R, R1 and R2 are e.g. phenyl, naphthyl, anthracyl, phenanthryl or a heterocyclic radical, are suitable as photoinitiators which accumulate at the surface of coatings.

Abstract: The invention relates to a composition comprising: a) an acid monomer or oligomer of acrylic acid or of an acid derivative of acrylic acid or mixtures thereof; or a mixture of an ethylenically unsaturated monomer or oligomer and an acid monomer or oligomer of acrylic acid or of an acid derivative of acrylic acid; b) at least one radical initiator which forms a radical upon heating or upon irradiation with (UV) light in the range from 305 nm to 450 nm; and c) a compound of the formulae (I), (Ib) or (Ic) wherein Y represents a group that activates nucleophilic addition reactions at the adjacent double bond; X represents halogen or the anion of an aliphatic or aromatic monocarboxylic or dicarboxylic acid of 1-12 carbon atoms, of a monovalent or divalent oxo acid or of a complex acid; n represents 0 or 1; R1, R2, R3 independently of one another represent hydrogen, C1-C18alkyl, C3-C18alkyl interrupted by at least one nitrogen or oxygen atom, C3-C18alkenyl, C3-C18alkynyl, C7-C9phenylalkyl, C3-C12 cycloalkyl and C3-

Abstract: The invention relates to a method of grafting unsaturated carboxylic acid derivatives onto thermoplastic polymers, which comprises heating a mixture of thermoplastic polymer, unsaturated carboxylic acid or carboxylic acid derivative and a hydroxy-lamine ester having at least one structural unit of formula (I) or (I?) wherein X is hydrogen, C1-C36alkyl, C2-C36alkenyl, C2-C18alkynyl, C6-C10aryl, —O—C1-C18alkyl —O—C6-C10aryl, —NH—C1-C18alkyl, —NH—C6-C10aryl, —N(C1-C6alkyl)2; X? is a direct bond or C1-C36alkylene, C2-C36alkenylene, C2-C36alkynylene, —(C1-C6alkylene)-phenyl-(C1-C6alkylene) or a group in a processing apparatus for thermoplastic polymers, to above the softening point/melting point of the thermoplastic polymer and allowing the components of the mixture to react with one another

Abstract: The present invention relates to surface-treated organic pigments, to a process for their preparation and to their use in colouring a high molecular weight organic material. Compared with untreated pigments, the surface-treated pigments exhibit better rheological properties and/or no warping in the pigmenting of partially crystalline plastics.

Abstract: The present invention relates to selected 1-alkoxy-2,2 diethyl-6,6 dimethyl piperidine and 1-alkoxy-2,6 diethyl-2,3,6 trimethyl piperidine derivatives which are substituted in the 4 position by an oxygen or nitrogen atom; a polymerizable composition comprising a) at least one ethylenically unsaturated monomer and b) said piperidine derivatives. Further aspects of the present invention are a process for polymerizing ethylenically unsaturated monomers, and the use of 1-alkoxy-2,2 diethyl-6,6 dimethyl piperidine and 1-alkoxy-2,6 diethyl-2,6 dimethyl piperidine derivatives which are substituted in the 4 position by an oxygen or nitrogen atom for controlled polymerization. The intermediate N-oxyl derivatives, a composition of the N-oxyl derivatives with ethylenically unsaturated monomers and a free radical initiator, as well as a process for polymerization are also subjects of the present invention.

Abstract: Stabilized thermoplastic polymer, especially polyolefin compositions comprising a flame retardant selected from b1) melamin based flame retardants, or one of the compounds b2) bis-(hexachlorocyclopentadieno)cyclooctane, b3) tris-(2,3-dibromopropyl)-isocyanurate, b4) ethylene-bis-tetrabromophthalimide; b5) 1,2,5,6,9,10-hexabromo-cyclo-dodecan, b6) ethane-1,2-bis(pentabromophenyl); and c) a sterically hindered amine light stabilizer of the hydrocarbyloxyamine or hydroxyhydrocarbyloxyamine class and optional further components combine optimum outdoor weathering stability and good flame retardant properties.

Abstract: Synthetic polymers which possess outstanding stability to oxidative, thermal or light-induced degradation comprise as stabilizer at least a compound of the formula I wherein R1 and R2 are each independently of one another hydrogen or C1-C8alkyl, R3 and R4 are each independently of one another C1-C12alkyl, and R5 is C1-C7alkyl.

Abstract: A stabilizer mixture containing (A) a sterically hindered amine compound, (B) an organic salt of Ca or an inorganic salt of Ca and (C) an organic salt of Mg, an inorganic salt of Mg, an organic salt of Zn or an inorganic salt of Zn; with the proviso that component (C) is Mg-hydroxide-carbonate, Zn-hydroxide-carbonate or dolomite, when component (B) is calcium stearate.

Abstract: The instant invention relates to a polyolefin composition which comprises d) at least one organic pigment e) at least one sterically hindered amine light stabilizer and f) as UV absorber a mixture of a 2-hydroxyphenyl benzotriazole and a 2-hydroxyphenyl-s-triazine. Further objects of the invention are a method for stabilizing pigmented polyolefins and the use of a UV-absorber mixture of a hydroxyphenyl benzotriazole with a hydroxyphenyl-s-triazine for the stabilization of pigmented polyolefins.

Abstract: A process for the preparation of a compound of formula (I) wherein R1 and R2 are each independently of the other C1-C8alkyl, cyclopentyl or cyclohexyl, m is 1, 2 or 3, preferably 2, n is an integer from 1 to 30, and R3 is an n-valent radical from linear or branched C4-C30alkyl, which is optionally interrupted by one or more oxygen atoms, or (when n=1-12) an n-valent radical from C5-C12cycloalkyl, or a radical R4—[NR5—CmH2m—]p, R4 is hydrogen, an n-valent radical from linear or branched C4-C30alkyl, which is optionally interrupted by one or more —NR5— groups, or (when n=1-12) an n-valent radical from C5-C12cycloalkyl, R5 radicals, each independently of any other(s), are hydrogen or methyl or —CmH2m—, preferably hydrogen, and p corresponds to the number of —[NR5—CmH2m—] groups that gives n —CmH2m— radicals per molecule, by reaction of a compound of formula (II) wherein R is C1-C3alkyl, with a compound of formula (III) R3(OH)n??(III) wherein R3 and n have the definitions given, wherein the reaction

Abstract: The invention pertains to a compound of formula (I), (II) or (III) wherein R1 and R2 are independently of each other hydrogen, C1-C18alkyl, C3-C18alkenyl, C3-C18alkinyl or phenyl which are unsubstituted or substituted by NO2, halogen, amino, hydroxy, cyano, carboxy, C1-C4alkoxy, C1-C4alkylthio, C1-C4alkylamino or di(C1-C4alkyl)amino; A is a group capable of forming a stable free nitroxyl radical A*, which is bound via its oxygen atom to the carbon atom; Y is O, NR3 or CHR3—Xa, wherein Xa is O, S or NR3; R3 is hydrogen, C1-C18alkyl, C3-C18alkenyl, C3-C18alkinyl or phenyl which are unsubstituted or substituted by NO2, halogen, amino, hydroxy, cyano, carboxy, C1-C4alkoxy, C1-C4alkylthio, C1-C4alkylamino or di(C1-C4alkyl)amino; Q1 is an organic or inorganic radical, derived from a compound having at least one functional group being capable of reacting with a hydroxy group; Q2 is an organic radical derived from a mono or polyfunctional alcohol, mono or polyfunctional aminoalcohol, mono or polyfunctional amine

Abstract: The present invention relates to a polymerizable composition, comprising a) at least one ethylenically unsaturated monomer or oligomer, b) a radical source capable of starting polymerization of the ethylenically unsaturated monomer or oligomer and c) at least one compound of formula (I) wherein n is 1 or 2 R3, R4, R9, R10 are each independently of one another C1-C18alkyl, C2-C18alkenyl or C2-C18alkinyl; or R3 and R4 and/or R9 and R10 form together with the linking carbon atom a C3-C12cycloalkyl radical; R5, R6, R7, R8 are each independently of one another hydrogen, C1-C18alkyl, C2-C18alkenyl or C2-C18alkinyl; X is —O—, —O—C(O)—, —NR2— or —NR2—C(O)—; R2 is hydrogen, C1-C18alkyl or phenyl; if n is 1, R1 is C8-C38alkyl, C8-C36alkenyl or C8-C36alkinyl if n is 2 R1 is C10-C38alkylen, C10-C36alkenylen or C10-C36alkinylen. Further objects of the present invention are a process for polymerization and the use of compounds of formula I for the polymerization of ethylenically unsaturated monomers.

Abstract: By of means of a curing process combining thermal and UV curing it is possible, using compositons comprising (A) a coating system based on a polyacrylate polyol or polyester polyol with melamine, or a polyacrylate polyol and/or polyester with a blocked or unblocked polyisocyanate, or a carboxyl-, anhydride- or amino-functional polyester and/or polyacrylate with an epoxy-functional polyester or polyacrylate, (B) an OH, NH2-,COOH-, Epoxy- or NCO-functional resin containing, in addition, at least one ethylenically unsaturated double bond, which is separated from the functional group by a spacer group, and (C)at least one photoinitiator, to obtain coatings having good surface properties.

Abstract: Polyolefins, especially polypropylene, can be made flame retardant by the incorporation therein of a synergistic mixture of a selected hindered amine substituted by an alkoxy, cydoalkoxy or hydroxyalkoxy moiety and a selected organic or inorganic brominated and/or phosphorus containing flame retardant, such as ammonium polyphosphate or decabromodiphenyl oxide wherein the amount of organic or inorganic flame retardant required to achieve an acceptable level of flame retardancy is significantly reduced compared to that needed when the hindered amine is not present.

Abstract: Hindered amines substituted on the N-atom with an -O-E-OH moiety are particularly effective in stabilizing polyolefin and automotive coating compositions against the deleterious effects of oxidative, thermal and actinic radiation where the presence of the OH group on the compounds adds important properties not attainable by the use of normal -O-E moieties.

Abstract: A product obtainable by transferring groups of formula (G-I) being present in a block oligomer having a polydispersity {overscore (M)}w/{overscore (M)}n of 1 to 1.7 and corresponding to formula (I) to groups of formula (Gu-II), wherein R1 is a hydrocarbyl radical or —O—R1 is oxyl; said transfer is carried out by reaction of the block oligomer with a hydroperoxide in a hydrocarbon solvent in the presence of a peroxide decomposing catalyst; n is a number from 2 to 14; R2 is for example C2-C12alkylene; A is for example —N(R4)(R5); R4 and R5 are for example C1-C18alkyl; R is preferably a group of formula (G-I) and B and B* have one of the meanings given for A; with the proviso that in the individual recurrent units of formula (I), each of the radicals B, R and R2 has the same or a different meaning. The products are useful as light stabilizers, heat stabilizers and oxidation stabilizers for organic materials, in particular synthetic polymers.

Abstract: A mixture for stabilizing polyolefins containing A) either (A1) at least one compound of the formula in which R1 is for example C1-C10alkyl; R2 is C3-C10alkylene; R3 is for example hydrogen or C1-C8alkyl; and n1 is a number from 2 to 50; or (A2) a product obtainable by reacting a product—obtained by reaction of a polyamine of the formula in which n2′, n2″ and n2′″ are a number from 2 to 12 with cyanuric chloride—with a compound of the formula wherein R4 is for example hydrogen or C1-C12alkyl; and R5 is as defined for R3 and B) magnesium oxide, magnesium hydroxide, C) zinc oxide, zinc hydroxide or an organic salt of zinc or magnesium, or a hydrotalcite; and at least one of C1) an UV absorber or C2) 2 pigment.

Abstract: The present invention relates to a process for coloration of a high molecular weight material by admixing said high molecular weight organic or inorganic material, preferably high molecular weight organic material, prior to processing with at least one compound of the formula: where A1 and A2 are independently unsubstituted, monosubstituted, disubstituted, trisubstituted or tetrasubstituted o-C6-C18arylene. The invention further relates to compositions of matter comprising isoxindigo compounds and high molecular weight organic material. The invention also relates to processes for preparing the compound of the formula (I) and also to novel isoxindigo compounds which can be symmetrical or asymmetrical or else have a bisisoxindigo structure.