Abstract:
The present invention relates to amine-based curing agents for epoxy resins with low tendency to the formation of carbamates. In particular the invention relates to methylcyclohexyl diamine based adducts which are particularly suitable for the curing of epoxy resins in the presence of humidity, e.g. flooring applications, because of their low tendency to the formation of carbamates (blushing). Accordingly, the invention relates to a process for the preparation of a cured epoxy resin by curing a curable composition comprising an epoxy resin and an adduct at a curing temperature in the range of 0°C to 100°C, wherein the adduct is formed by reacting methylcyclohexyl diamine with a diglycidyl ether diol, and wherein the composition is exposed to humidity at least least part of the initial 24h time period of the curing starting with the time mixing epoxy resin and adduct of the composition. The invention also relates to a hardener component, comprising a diluent and a methylcyclohexyl diamine based adduct,wherein the diluent is selected from the group consisting of benzyl alcohol, bisphenol A, and alkyl substituted phenols.
Abstract:
Die vorliegenden Erfindung betrifft die Polyamine N,N'-Diaminopropyl-2-methyl-cyclohexan-1,3-diamin und N,N'-Diaminopropyl-4-methyl-cyclohexan-1,3-diamin bzw. deren Mischungen, deren Verwendung als Härter für Epoxidharz, sowie eine härtbare Zusammensetzung umfassend Epoxidharz und diese Polyamine. Dieser Härter bzw. die entsprechende härtbare Zusammensetzung härtet auch bei niedrigen Temperaturen schnell und ist frühwasserbeständig, und daher insbesondere für Bodenbeschichtungen geeignet. Die Erfindung betrifft weiter die Härtung dieser Zusammensetzung sowie das durch Härtung dieser Zusammensetzung erhaltene gehärtete Epoxidharz.
Abstract:
The present invention relates to coating composition comprising at least one unsaturated polyester (A) comprising units of formula (1), a reactive diluent (B) comprising at least one polymerizable compound (B1), at least one catalyst (C), optionally at least one actinic radiation-activatable polymerization initiator (D), optionally at least one solvent (E), optionally at least one coating composition additive (F), and optionally at least one polymer (G) different from the unsaturated polyester (A), with the proviso that the coating composition does not comprise any peroxide, to substrates coated with the coating composition, to a process for the preparation of the coated substrates, and to compositions consisting of at least one unsaturated polyester (A) comprising units of formula (1), a reactive diluent (B) comprising at least one polymerizable compound (B1), at least one catalyst (C), and optionally at least one solvent (E).
Abstract:
Die vorliegende Erfindung betrifft Verfahren zur katalytischen Herstellung von thermoplastischen Polyoxazolidonen aus aromatischen Diisocyanten und 2-Phenyl-1,3-propandiol-Diglycidylether-Derivaten, sowie die entsprechenden thermoplastischen Polyoxazolidone und deren Verwendung als thermoplastische Kunststoffe.
Abstract:
Secondary diamine Ν,Ν`-dialkyl methylcyclohexanediamine acts as a reactive diluent for curable epoxy resin compositions. The addition of this compounds significantly reduces the initial viscosity of the epoxy resin composition while the resulting cured epoxy resin exhibits comparable favorable mechanical, chemical resistance and thermal properties such as low water uptake and high glass transition temperatures. Such compositions are particular suitable for manufacturing of composites with high mechanical and heat resistance properties by the means of resin transfer molding (RTM), vacuum aided resin transfer molding (VARTM) or infusion technology.
Abstract:
Verfahren zur Herstellung einer Verbindung der Formel I (I) oder der Formel II (II) oder deren Gemische, wobei R 1 für einen Kohlenwasserstoffrest mit maximal 14 C-Atomen steht, dadurch gekennzeichnet, dass eine Verbindung der Formel III (III) oder der Formel IV (IV) oder deren Gemische mit einem Aldehyd oder Keton mit jeweils maximal 14 C-Atomen in Gegenwart von Wasserstoff umgesetzt werden.