Abstract:
The invention relates to a method for the production of cyclopentane derivatives of formula (I), in which R represents a C1-C10 alkyl group, characterized in that cyclohexanol or cyclohexene or mixtures of both compounds are reacted to 1-methyl-1-cyclopentene (first stage), a C1-C10 alkanol being added subsequently to the double bond of the 1-methyl-1-cyclopentene (second stage).
Abstract:
The invention relates to a method for producing triethylenediamine (TEDA) derivatives, comprising the following steps: a) reaction of a dihydropyrazine with an olefin, b) optionally hydrogenation following step a). The invention also relates to novel TEDA derivatives as such and to the use thereof as built-in polyurethane catalysts.
Abstract:
The invention relates to a method for the production of 1-methylcyclopentene by the thermal reaction of cyclohexanol or cyclohexene or mixtures of both compounds to 1-methylcyclopentene, characterized in that the obtained byproducts 3-methylcyclopentene and 4-methylcyclopentene (double bond isomers of 1-methylcyclopentene) are fed back to the reaction.
Abstract:
The invention relates to a method for removing at least one first substance from a mixture that contains the at least one first substance and at least one second substance. Said method comprises the following steps: (A) contacting the mixture containing at least one first substance and at least one second substance with at least one surface-active substance, optionally in the presence of at least one dispersant, the surface-active substance binding to the at least one first substance, (B) optionally adding at least one dispersant to the mixture obtained in step (A) to obtain a dispersion, (C) treating the dispersion obtained in step (A) or (B) with at least one hydrophobic magnetic particle so that the at least one first substance to which the at least one surface-active substance is bound and the at least one magnetic particle are added thereto, (D) removing the addition product obtained in step (C) from the mixture by applying a magnetic field, (E) breaking down the removed addition product obtained in step (D) to obtain the at least one first substance and the at least one magnetic particle as separate entities.
Abstract:
The present invention relates to a blend containing an epoxy resin, a cyclic carbonate and a hardener containing a polyalkoxypolyamine, an additional amine and a catalyst, a process for producing this blend, the use of the blend according to the invention for producing cured epoxy resin and an epoxy resin which has been cured by means of the blend according to the invention, in particular fibre-reinforced cured epoxy resins for use in rotor blades for wind turbines.
Abstract:
The invention relates to compounds having two or more exovinylene cyclic-carbonate units, said exovinylene cyclic-carbonate units being bound together by means of at least one organic siloxane-free compound group which is not directly connected to the exovinylene double bonds and compound groups formed by polymerizing (meth)acrylic monomers are excluded. The compound group comprises, preferably at least one acetal group. The invention also relates to a method for producing the compounds, dual-component binding agents which contain the compounds and to the uses of the compounds.
Abstract:
The invention relates to compounds having two or more exovinylene cyclic-carbonate units, said exovinylene cyclic-carbonate units being bound together by means of at least one organic siloxane-free compound group which is not directly connected to the exovinylene double bonds and compound groups formed by polymerizing (meth)acrylic monomers are excluded. The compound group comprises, preferably at least one acetal group. The invention also relates to a method for producing the compounds, dual-component binding agents which contain the compounds and to the uses of the compounds.
Abstract:
The invention relates to a method for removing at least one first substance from a mixture that contains the at least one first substance and at least one second substance. Said method comprises the following steps: (A) contacting the mixture containing at least one first substance and at least one second substance with at least one surface-active substance, optionally in the presence of at least one dispersant, the surface-active substance binding to the at least one first substance, (B) optionally adding at least one dispersant to the mixture obtained in step (A) to obtain a dispersion, (C) treating the dispersion obtained in step (A) or (B) with at least one hydrophobic magnetic particle so that the at least one first substance to which the at least one surface-active substance is bound and the at least one magnetic particle are added thereto, (D) removing the addition product obtained in step (C) from the mixture by applying a magnetic field, (E) breaking down the removed addition product obtained in step (D) to obtain the at least one first substance and the at least one magnetic particle as separate entities.