Abstract:
The present invention relates to symmetric diesters of hydroxyalkyl-4-hydroxy- tetraalkylpiperidine compounds and their use as light stabilizers. They are compatible with and soluble in coating formulations of different polarity.
Abstract:
La presente invención se refiere a una forma cristalina no solvatada de 6,6'- [[3,3', 5,5'-tetraquis (1,1-dimetiletil) - [1,1'-bifenil] -2,2'-diilo] bis (oxi)] bis-dibenzo [d, f] [1,3,2] -dioxafosfepina (compuesto I) y solvatos de tolueno y solvatos de acetona de los mismos.
Abstract:
The present invention relates to symmetric diesters of hydroxyalkyl-4-hydroxy-tetraalkylpiperidine compounds and their use as light stabilizers. They are compatible with and soluble in coating formulations of different polarity.
Abstract:
A process for the preparation of a zeolitic material having a structure comprising YO2 and X2O3 is provided, wherein said process comprises the steps of ( 1 ) providing a mixture comprising one or more ammonium compounds of which the ammonium cation has the formula (I): [R1R2NR3R4+(I) and further comprising one or more sources for Y02 and one or more sources for X2O3; (2) crystallizing the mixture provided in step ( 1 ); wherein Y is a tetravalent element, and X is a trivalent element, and wherein the ammonium compounds are preferably derivatized or underivatized N,N-dimethylpyrrolidinium compounds, Nu,Nu-dimethylpiperidinium compounds, Nu,Nu-dimethylhexahydroazepinium compounds, and mixtures thereof, and wherein the molar ratio of ammonium cation having the formula (I) to Y in the mixture provided in step (1) and crystallized in step (2) is equal to or greater than 0.25.
Abstract:
La presente invención se refiere a un método para la producción de 6-clorodibenzo[d, f] [1,3,2]dioxafosfepina (I) (ver Fórmula) en el cual se hace reaccionar 2,2´-dihidroxibifenilo con PCl3 en presencia de una cantidad catalítica de una sal ácida de una base nitrogenada, la reacción teniendo lugar en ausencia de solventes orgánicos externos.
Abstract:
The present invention relates to process for the production of plane-parallel platelets, comprising the steps of: a) vapor-deposition of a separating agent onto a carrier to produce a separating agent 5 layer, b) vapor-deposition of at least one product layer onto the separating agent layer, and c) dissolution of the separating agent layer in a solvent and production of a suspension in which the at least one product layer is present in the form of plane-parallel platelets, wherein the separating agent is selected from the group consisting of anthracene, anthraquinone, acetamidophenol, acetylsalicylic acid, camphoric anhydride, benzimidazole, benzene-1,2,4-tricarboxylic acid, biphenyl-2,2-dicarboxylic acid, bis(4-hydroxyphenyl)sulfone, dihydroxyanthraquinone, hydantoin, 3-hydroxybenzoic acid, 8-hydroxyquinoline-5-sulfonic acid monohydrate, 4-hydroxycoumarin, 7-hydroxycoumarin, 3-hydroxynaphthalene-2-carboxylic acid, isophthalic acid, 4,4-methylene-bis-3-hydroxynaphthalene-2-carboxylic acid, naphthalene-1,8-dicarboxylic anhydride, phthalimide and its potassium salt, phenolphthalein, phenothiazine, saccharin and its salts, tetraphenylmethane, triphenylene, triphenylmethanol, and also mixtures of at least two of those substances, especially pentaerythritol (C(CH2OH)4), trimesic acid (=1,3,5 benzene tricarboxylic acid), DL-alanine, DL-valine, 2,6-20 diaminopurine, ascorbic acid, 1,3,5-benzenetricarboxylic acid, o-acetylsalicyclic acid, diphenic acid, terephthalic acid, pyrogallol, cyanuric acid, hexamethyltetramine (urotropin), fumaric acid, and 4-acetylbenzoic acid and also mixtures of at least two of those substances.
Abstract:
Monomeric or polymeric compounds comprising at least one moiety of the formula (Ia) wherein X is CR, where R is H or a substituent as defined in claim 1, or is another ketopyrrole moiety e.g. of the formula (Ib) or (Ic) with this moiety and all other symbols are as defined in claim 1, show good solubility in organic solvents and excellent film-forming properties. In addition, high efficiency of energy conversion, excellent field-effect mobility, good on/off current ratios and/or excellent stability can be observed, when the polymers according to the invention are used in semiconductor devices or organic photovoltaic (PV) devices (solar cells).
Abstract:
Un compuesto que tiene la formula (I)**Fórmula** en donde A es -CH(R3)-CH2- o -CH2- CH(R3)- ; cada R1 es igual y se selecciona de Alquilo C1-C21; Cicloalquilo C3-C7; -CH2-R5, en donde R5 es un hidrocarbilo C2-C20 aciclico que tiene uno, dos o tres dobles enlaces; Alquilo C1-C21 sustituido con al menos un sustituyente seleccionado de alcoxi C1-C4, -OH o -CN; Cicloalquilo C3-C7 sustituido con al menos un sustituyente seleccionado de alquilo C1-C4, alcoxi C1-C4, -OH o -CN; y Alquilo C4-C21 sustituido con -CO-R4, en donde R4 es alquilo C1-C4; R2 se selecciona de H y alquilo C1-C3; y R3 es H o alquilo C1-C4.