Abstract:
PROBLEM TO BE SOLVED: To provide a method for purifying N-vinyl-ε-caprolactam for producing an N-vinyl-ε-caprolactam hardly manifesting any sensibility for color changes, i.e., having high color stability higher than that of usual N-vinyl-ε-caprolactam obtained by distillation. SOLUTION: N-vinyl-ε-caprolactam to be purified having at least 95 mass % purity is changed to a molten liquid, which is partially crystallized and the crystal is separated from the mother liquid. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To obtain an alkenyl compound stabilized in a color number having a remarkably low color number for expressing no tendency to be colored after a storage of longer period of several months or extremely slight coloration with avoiding an expensive cost. SOLUTION: The color number of an alkenyl compound having a divalent or a trivalent heteroatom at α position to a double bond is stabilized and/or lowered mixing an oxidizing agent with the alkenyl compound.
Abstract:
The invention relates to a method for producing 1-substituted 5- and/or 3-hydroxypyrazoles of formulas (I) and (II), wherein R represents C1-C6-alkyl, C2-C6-alkenyl, C2-C6-alkinyl, C3-C6-cycloalkyl or C1-C4-alkoxy, whereby these groups can be substituted by halogen, C1-C4-alkoxy, phenoxy, C1-C6-alkoxycarbonyl, C1-C6-alkylthiocarbonyl or a cyclic ring system with 3-14 ring atoms, by reacting a 3-alkoxyacrylic acid alkyl ester of formula (III), wherein R , R independently mean C1-C6-alkyl or C3-C6-cycloalky, with a hydrazine of formula (IV), wherein R has the above cited meaning, a) at a pH value of 6-11 to form 5-hydroxypyrazoles of formula (I), or b) at a pH value of 11-14 to form 3-hydroxypyrazoles of formula (II).
Abstract:
The invention relates to a method for continuously producing methyl vinyl ether by reacting methanol with ethyne in the liquid phase in the presence of a basic alkali metal compound or alkaline earth metal compound at a temperature ranging from 40 to 300 °C and under a pressure ranging from 0.1 to 5 MPa abs. According to the invention, the reaction is carried out in the absence of a continuous gas phase and with a methyl vinyl ether concentration in the entire liquid phase of
Abstract:
The invention relates to compositions for treating hard surfaces and containing a water-soluble or water-dispersible compound, as constituent A, that can be obtained by the reaction of aa) polyalkylene polyamines, polyamidoamines, polyamidoamines grafted by ethyleneimine, polyetheramines, and mixtures of the cited compounds, as constituent Aa; ab) optionally at least bifunctional crosslinkers that comprise, as a functional group, a halogenhydrine, glycidyl, aziridine or isocyanate unit, or a halogen atom, as constituent Ab; ac) monoethylenically unsaturated carboxylic acids, salts, esters, amides or nitriles of monoethylenically unsaturated carboxylic acids, chorocarboxylic acids and/or glycidyl compounds such as glycidyl acid, glycidyl amide or glycidyl esters; and water. The invention also relates to a method for producing a water-soluble or water-dispersible compound, water-soluble or water-dispersible compounds that can be produced according to the inventive mehtod, and the use of water-soluble or water-dispersible compounds according to the invention in compositions for treating hard surfaces, for rapid drying without marks, for simplifying the removal of dirt, for reducing or preventing the condensation of water, and/or for forming dried water marks on the hard surfaces.
Abstract:
The invention relates to a method for the production of 1-substituted 5-hydroxypyrazoles of formula (I) wherein R is C1-C6-alkyl, C2-C6-alkenyl, C2-C6-alkinyl, C3-C6-cycloalkyl or C1-C4-alkoxy, whereby these groups can be substituted by halogen, C1-C4-alkoxy, phenoxy, C1-C6-alkoxycarbonyl, C1-C6-alkylthiocarbonyl or a cyclic ring system with 3-14 ring atoms, by reacting a) an alkylvinylether of general formula (III) wherein R is C1-C6-alkyl or C3-C6-cycloalkyl, with phosgene (IVa), "diphosgene" (IVb) or "triphosgene" (IVc) to form acid chlorides of formula (V), b) transforming said acid chlorides by eliminating hydrogen chloride into the corresponding 3-alkoxyacrylic acid chloride of formula (VI) and c) reacting said acid chloride with hydrazines of formula (VII) wherein R has the above cited meaning, to form 5-hydroxypyrazoles of formula (I).
Abstract:
The invention relates to the use of polymers containing (a) monomer units of formula (I) wherein R represents hydrogen or C1-C4-alkyl, (b) monomer units of formula (II) wherein R and R represent, independently from each other, hydrogen or C1-C4-alkyl, or (c) monomer units of formula (I) and monomer units of formula (II), in order to reduce the smell in dishwashers.
Abstract:
The invention relates to the use of aceto or benzophenone derivatives of general formula (I), wherein R represents optionally substituted C1 - C3-alkyl, C6 - C10-aryl or aralkyl having 6 -10 C-atoms in the aryl part and 1 - 6 C-atoms in the alkyl part, as copolymerisable photoinitiators. The invention further relates to copolymers, which contain aceto or benzophenone derivatives of general formula (I) in a polymerised form. The invention also relates to methods for the production of said copolymers and to the use thereof in UV-cross-linkable materials.
Abstract:
composição para tratar superfícies duras, processo para preparar compostos solúveis em água ou dispersíveis em água, composto solúvel em água ou dispersível em água, processo para tratar superfícies duras, e, usos de compostos solúveis em água ou dispersíveis em água, e de composições a invenção refere-se às composições para tratar superfícies duras e contendo um composto dispersível em água ou solúvel em água, como constituinte a, que pode ser obtido pela reação de aa) polialquileno-poliaminas, poliamido-aminas, poliamido-aminas enxertadas com etilenoimina, poliéter-aminas e mistruras de citados compostos, como constituinte aa; ab) opcionalmente reticulantes pelo menos bifuncionais que compreendem, como um grupo funcional, uma unidade de haloidrina, glicidila, aziridina ou isocianato, ou um átomo de halogênio, como constituinte ab; ac) ácidos carboxílicos monoetilenicamente insaturados, sais, ésteres, amidas ou nitrilas de ácidos carboxílicos monoetilenicamente insaturados, ácidos cloro-carboxílicos e/ou compostos de glicidila tais como glicidil-ácido, glicidil-amida ou glicidil-ésteres; e água. a invenção também se refere a um método para produzir um composto solúvel em água ou dispersível em água, aos compostos solúveis em água ou dispersíveis em água que podem ser produzidos de acordo com o método da invenção, e ao uso de compostos solúveis em água ou dispersíveis em água em composições para tratar superfícies duras, para secagem rápida sem marcas, para simplificar a remoção de sujeira, para reduzir ou prevenir a condensação de água, e/ou para formar marcas de água secas sobre superfícies duras.
Abstract:
The use of water-soluble or water-dispersible polymers obtainable by reaction of (a) polyalkylenepolyamines, polyamidoamines or ethyleneimine-grafted polyamidoamines or mixtures thereof, (b) if desired at least bifunctional crosslinkers and (c) monoethylenically unsaturated carboxylic acids, salts, esters, amides or nitriles of monoethylenically unsaturated carboxylic acids, chlorocarboxylic acids and/or glycidyl compounds, said component (a) having an average molecular weight Mw in the range from 20 000 to 2 000 000 and the molar ratio of the hydrogen atoms on the nitrogen in said component (a) to said component (b) being in the range from 1:0.7 to 1:0.9, as a laundry detergent additive.