Abstract: A process for the preparation of a quinacridone comprises oxidation of a 6,13-dihydroquinacridone using hydrogen peroxide, wherein a polymeric dispersant is present in the oxidation reaction mixture. The resulting pigment products exhibit greatly improved dispersibility relative to pigments in which the polymeric dispersant is not present during the oxidation reaction.

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: The invention relates to metathesis polymers wherein an aromatic group that has UV-light absorbing properties is attached with a bridge group to the polymer. Also disclosed is a polymerizable composition comprising a catalytically effective amount of a penta- or hexavalent ruthenium or osmium carbene catalyst, the process for preparing the metathesis polymer by applying the reaction conditions of Ring Opening Metathesis Polymerization (=ROMP) to the polymerizable composition; and various technical applications of the metathesis polymers.

Abstract: Described is a process for preparing concentrated solutions or suspensions of anionic organic compounds which comprises a) acidifying an aqueous solution or suspension of an anionic organic compound containing salts and/or impurities to a pH of 4.5 or less, if the pH is above this value, so that b) the anionic organic compound is water-insoluble and precipitates in the form of the free acid, c) bringing the suspension to a salt content below 2% by weight, based on the total weight of the retentate, by means of ultrafiltration with a membrane having pore diameters of from 0.001 to 0.02 ?m, and d) optionally washing out the salts with water having a pH below 4,5, e) optionally carrying out acid-free washing with water thereafter, and then f) concentrating, so that the amount of anionic organic compound is 5-50% by weight, and g) if desired, bringing the anionic organic compound into solution by adding an appropriate base.

Abstract: The present application relates to a process for the manufacture of pigmented vitreous materials, as well as to pigmented vitreous materials, characterized by the use of soluble pigment precursors and preferably the absence of significant amounts of dispersants. These pigmented vitreous materials can be used as colored materials for any known purposes. Soluble pigment precursors comprising a partial structure are also claimed, wherein X1 is an aromatic or heteroaromatic ring, B is hydrogen or a group of the formula but at least one group B is not hydrogen, and L is a solubilizing group.

Abstract: Compounds which have a benzotriazole and a hindered amine moiety in the same molecule are typified by the formula A wherein at least one of G2, R1 or R2 contains a hindered amine moiety are extremely effective light stabilizers having both the UV absorbing activity of a benzotriazole and the light stabilizing efficacy of a hindered amine in the same molecule. These compounds are effective stabilizers for thermoset resin compositions, thermoplastic resin compositions, for photographic applications, for pigmented or dyed polypropylene, polyamide or polyester fibers, and for white, dyed, dipped, unscented and/or scented candle wax against discoloration and fading when incorporated therein alone or in combination with an antioxidant.

Abstract: The present invention pertains to a process for controlled free radical polymerization or copolymerization of vinyl chloride at a temperature between 40° C. and 95° C., at a pressure between 5 and 30 bar in the presence of a stable free nitroxyl radical.

Abstract: The invention relates to a compound of formula Ia, Ib or Ic The open chain alkoxyamine compounds are useful for the polymerization of ethylenically unsaturated monomers. The compounds of the present invention provide polymeric resin products having low polydispersity. The polymerization process proceeds with enhanced monomer to polymer conversion efficiency. In particular, this invention relates to stable free radical-mediated polymerization processes which provide homopolymers, random copolymers, block copolymers, multiblock copolymers, graft copolymers and the like, at enhanced rates of polymerization and enhanced monomer to polymer conversions.

Abstract: Sterically hindered N-substituted aryloxyamines are prepared by the Keggin polyoxometalate or the transition metal substituted polyoxometalate (TMS-POM) catalyzed decomposition of diazonium salts in the presence of a sterically hindered nitoxyl radical. These compounds are useful as thermal and light stabilizers for a variety of organic substrates.

Abstract: Biphenyl-substituted triazines of the formulae which are notable for high thermal stability, are used as stabilizers for organic polymers to counter damage thereto caused by light, oxygen and heat, as light stabilizers for textile fiber materials and as sunscreens for the human skin.

Abstract: The invention relates to a compound of the 1-aminoanthraquinone, anthanthrone, anthrapyrimidine, quinacridone, dioxazine, diketopyrrolopyrrole, flavanthrone, indanthrone, isoindolinone, isoviolanthrone, perinone, perylene, phthalocyanine, pyranthrone or thioindigo series, which compound has one or more sulfonate groups of formula (1) wherein R1 is methyl or ethyl, R2, R3? and R4 are each independently of the others C6-C24alkyl or C6-C24alkenyl, m is a number from 0.3 to 1.0 and n is a number from 0 to (1.0 m), the compound being suitable for use as a pigment dispersant and rheology improver. Also claimed are modified pigments having that compound on their surface, and also pigment compositions and dispersions comprising that compound.

Abstract: A stabilizer mixture containing (I) two different sterically hindered amine compounds, and (II) at least one compound selected from the group consisting of an organic salt of Zn, an inorganic salt of Zn, Zn oxide, Zn hydroxide, an organic salt of Mg, an inorganic salt of Mg, Mg oxide and Mg hydroxide.

Abstract: The invention relates to a compound of the 1-aminoanthraquinone, anthanthrone, anthrapyrimidine, quinacridone, dioxazine, diketopyrrolopyrrole, flavanthrone, indanthrone, isoindolinone, isoviolanthrone, perinone, perylene, phthalocyanine, pyranthrone or thioindigo series, which compound has one or more sulfonate groups of formula (I) wherein R1 is methyl or ethyl, R2 is C6-C24alkyl, C6-C24alkenyl or C7-C24aralkyl, R3 and R4 are each independently of the other a chain consisting 1, 2 or 3 members, each member independently of any other(s) being (CH2))2O—, —(CH2)3O—, CH(CH3)CH2O—, —CH2CH(CH3)—O— or —CH2CH(CH2O—)O—and the chains being terminated by H, CH3, C2H5 ?or C(═O)CH3, m is a number from 0.3 to 1.0 and n is number from 0 to (1.0−m), the compound being suitable for use as a pigment dispersant and rheology improver.

Abstract: The present invention relates to a process for controlled radicalpolymerization in aqueous dispersion in the presence of selected nitroxyl radicals having a defined partition equilibrium between water and monomer as measured by their log p. wherein p is the partition coefficient of the nitroxyl radical in octanol and water.

Abstract: A process in which material comprising an aqueous liquid with dispersed particulate solids is pumped as a fluid then allowed to stand and rigidify and the rigidification is improved whilst retaining the pump ability of the material by combining polymeric particles with the material during or prior to pumping the material, wherein the polymeric particles comprise water soluble polymer which has an intrinsic viscosity of at least 3 dl/g. The process of the invention more effectively minimises the area taken up by a stack of the material of given volume whilst maintaining the pumpability of the material. This invention is particularly suited to material that comprises red mud from the Bayer alumina process.

Abstract: A copper and optical fiber filling material that comprises a hydrocarbon component, which is semisolid at use temperatures in combination with an antioxidant system comprising of (a) sulfur containing primary phenolic antioxidant; (b) a mixture of mono- and di-alkyl butyl/octyl diphenylamine; (c) an organic phosphite or phosphonite and (d) optionally one or more hindered phenol antioxidants exhibits excellent oxidative stability.

Abstract: Provided is a process for preparing 2H-benzotriazole UV absorbers containing a perfluoroalkyl moiety at the 5-position of the benzoic ring, for example a trifluoromethyl group, which involves digitizing the perfluoroalkyl substituted o-nitroaniline using concentrated sulfuric acid plus sodium nitrite or nitrosylsulfuric acid to form the corresponding monoazobenzene intermediate via the diazonium salt intermediate which is reduced to the corresponding 5-perfluoroalkyl substituted 2H-benzotriazole UV absorber compound by conventional reduction means. Also provided is a novel one-pot, multiphase reaction for the preparation of 2(2-nitrophenylazo) substituted phenols, which are precursors for 2H-benzotriazole UV absorbers.

Abstract: The invention describes novel compounds of the formula (I) wherein the general symbols are as defined in claim (1) and R1 is an aromatic radical with electron withdrawing substituents, as stabilizers for protecting organic materials, in particular polymers and lubricants, against oxidative, thermal or light-induced degradation and as scavengers for oxidized developer in color photographic material.

Abstract: Radically photopolymerizable compositions comprising (a) at least one ethylenically unsaturated photopolymerizable compound; (b) as photoinitiator, at least one compound of formulae (I, II, III, IV, V and/or VI), wherein m is 0 or 1; n is 0, 1, 2 or 3; x is 1 or 2; R1 is inter alia phenyl, naphthyl, anthracyl or phenanthryl, a heteroaryl radical, C2-C12alkenyl, C4-C8cycloalkenyl, or C6-C12bicycloalkenyl; R′1 is inter alia C2-C12alkylene, or phenylene; R2 has one of the meanings of R1 or inter alia is phenyl; y is 1 or 2; R3 if x is 1 inter alia is C1-C18alkylsulfonyl, or phenyl-C1-C3alkylsulfonyl, R3 if x is 2, is for example C2-C12alkylenedisulfonyl; R4 and R5 inter alia are hydrogen, halogen, or C1-C8alkyl; R6, R7, R8 inter alia are hydrogen, R26Y—, or phenyl; R9 inter alia is C5-C8cycloalkyl, or phenyl; A is for example —S—, —O—, or —NR10—; Q is C1-C8-alkylene optionally interrupted by —O—; X is —O— or —NR9—; R10 inter alia

Abstract: Aqueous storage-stable, non-sedimenting photoinitiator suspensions comprising (a) a mono- or bis-acylphosphine oxide of formula (I), wherein R1 is C1-C20alkyl; C2-C20alkyl interrupted by one or more O atoms; C1-C12alkoxy; phenyl-C1-C4alkyl; or phenyl that is unsubstituted or substituted by C1C20alkyl, C1-C12alkoxy, halogen, cyclopentyl, cyclohexyl, C2-C12alkenyl, C2-C18alkyl interrupted by one or more O atoms, and/or by phenyl-C1-C4alkyl; or R1 is biphenylyl; R2 is an aromatic radical or has one of the meanings give for R1; R3 and R4 are each independently of the other C1-C12alkyl, C1-C12alkoxy or halogen; and R5 is hydrogen, C1-C12alkyl, C1-C12alkoxy or halogen; (b) a dispersant; and (c) water are suitable especially in the photopolymerisation of aqueous formulations comprising ethylenically unsaturated monomers.