Abstract: A curing agent for epoxy resins, including at least one amine A1 of the formula (I) and at least one amine A2 which is a polyalkyleneamine or polyethyleneimine, where the weight ratio between amine A1 and amine A2 is in the range from 20/1 to 1/2. The curing agent of the invention enables inexpensive and low-emission epoxy resin products having good processability, long pot life, surprisingly rapid curing, especially also under cold conditions, high strength, high bond strengths, high glass transition temperature and a low tendency to yellowing, with formation of surprisingly nice surfaces having barely any blushing-related defects even in the case of two-dimensional application and under moist and cold conditions. Such epoxy resin products are advantageously usable as coating, especially for floors, or as adhesive.

Abstract: The use of an amine of formula (I) for curing epoxy resins, whereby synthetic resin products with a surprisingly high glass transition temperature are formed with particularly low exotherm. The amine of formula (I) enables in particular epoxy resin mouldings, potting compounds and composites which are simple and void for defects to be produced, having beautiful surfaces and allow high service temperatures.

Abstract: A Mannich base of formula (1) and the use thereof as a component of a hardener for epoxy resins, wherein the Mannich base of formula (1) has a high Renewable Carbon Index. It makes it possible to produce high-quality and sustainable epoxy resin products which have a surprisingly good processability, cure rapidly and in an unimpeded manner at ambient temperature and form a pleasing surface at a high final hardness.

Abstract: A composition containing calcium nitrate, at least one epoxy resin and at least one amine of formula (I). The composition allows the manufacture of low-emission epoxy-resin coatings that have good workability and that cure particularly rapidly in cold and damp conditions, without blushing-induced surface defects, thus achieving coatings of in particular high mechanical quality, with a minimal tendency to yellowing.

Abstract: The use of a hardener containing at least one amine of formula (I) for crosslinking of amine-reactive compounds, wherein the amines of formula (I) are biobased and obtainable from vanillin or guaiacol. The amines of formula (I) have particularly good compatibility with epoxy resins as the amine-reactive compound. They make it possible to obtain biobased epoxy resin products that are superior to petrobased products not only in terms of sustainability but also in terms of technical performance.

Abstract: The use of a hardener that contains at least one amine of formula (I), for curing epoxy resins. The amine of the formula (I) has a high renewable carbon index (RCI) and allows for especially sustainable epoxy resin products. It can be surprisingly easily produced, is low odor, dilutes the epoxy resin especially well and allows rapid and trouble-free hardening with surprising little exothermic effects.

Abstract: An amine of the formula (I) is used for curing of epoxy resins and enables surprisingly rapid and undisrupted curing and high final hardnesses, with formation of nice, faultless surfaces with high gloss even in the case of two-dimensional application and low temperatures. It is suitable as curing agent, co-curing agent and/or incorporable accelerator for epoxy resin products such as, in particular, coatings, adhesives, potting compounds or shaped bodies.

Abstract: An amine of the formula (I) and for its use for curing of epoxy resins, the amine of the formula (I) has low odor and low viscosity and enables surprisingly rapid curing at ambient temperatures to give a material of high final hardness and high surface quality.

Abstract: A method to reinforce a built structure, wherein an impregnation resin including a resin component including at least one epoxy resin and hardener component including at least one amine of the formula (I) is used to impregnate woven or stitched fabric, which is wrapped around and/or adhered onto built structure. The inventive method preferably serves to improve earthquake safety of buildings, as replacement for missing reinforcement inside concrete, for improvement of strength and ductility or for increase of payload of a built structure. It enables the application of an emission-free impregnation resin with low odour, which has a long open time and good penetration into the fabric, shows fast and reliable curing without tendency to blushing, and forms a dry, non-sticky surface. The cured impregnation resin has a high strength, a high glass transition temperature and good adhesion properties, enabling a good durability and long-term stability of the reinforced structure.

Abstract: An amine-functional adduct from the reaction of at least one amine of the formula (I) with at least one novolak epoxy resin having an average functionality in the range from 2.5 to 4. The adduct is liquid at room temperature without thinners and without a large excess of amine. It is suitable as a curing agent for epoxy resin compositions, in which it permits good workability, rapid curing, high hydrophobicity, and a high crosslinking density. It is particularly suitable for coatings, in which it permits nice surfaces, good intercoat adhesion, high thermal shock resistance, and good protection against steel corrosion.

Abstract: A floor protection system including (i) optionally at least one epoxy resin primer, (ii) at least one polyurethane coating, (iii) optionally quartz sand, which has been scattered into and/or onto the polyurethane coating, and (iv) an epoxy resin sealant, obtained from a resin component containing at least one epoxy liquid resin and a hardener component containing at least one amine of formula (I). The floor protection system has an aesthetically pleasing, hard and robust surface and a good dynamic crack bridging with surprisingly high elasticity of the sealant. The system is particularly suitable as a surface protection system for parking levels and drivable ramps.

Abstract: The invention relates to an epoxy resin composition comprising at least one epoxy liquid resin, bis(aminomethyl)cyclohexane and a wax. The claimed composition can be processed in an excellent manner, cures very rapidly and virtually no yellowing occurs, has a hard, glossy surface of high quality, even during curing under moist conditions such as, for example, 8° C. and 80% relative humidity. The claimed composition is particularly suitable for use as a floor coating, in particular as a top coat or sealing, where low emission together with high demands on the workability, impact strength and the aesthetics exist.

Abstract: A combination of carbon nanotubes and at least one amine of formula (I) for producing an electrically conductive epoxy resin coating, and to an electrostatically dissipative floor system, which contains the electrically conductive epoxy resin coating. The epoxy resin floor systems are readily-workable, robust, electrostatically, dissipative, and have a largely constant electrical resistance, which have a highly aesthetic, well-ventilated, even surface.

Abstract: A curing agent for epoxy resins has N-benzylethane-1,2-diamine and N,N?-dibenzylethane-1,2-diamine in a weight ratio in the range from 65/35 to 95/5. The curing agent is easy to prepare, thins epoxy resins particularly well, and enables low-emission epoxy resin products that have good workability and a long pot-life, cure reliably and surprisingly fast and can be walked on after a short time, in particular even in cold conditions. Coatings of particularly high mechanical grade, with a high surface quality and a minimal tendency to yellowing, can thus be produced. Epoxy resins of this type are particularly suitable for coating floors.

Abstract: A curing agent for epoxy resins, including 1-amino-3-aminomethyl-3,5,5-trimethylcyclohexane and N-benzyl-1,2-ethandiamine in an amount for the ratio of the number of its amine hydrogens to be in the range of 90/10 to 20/80. The curing agent permits suitable epoxy resin compositions that have excellent workability and that cure particularly rapidly in cold and damp conditions, without blushing-induced surface defects, thus achieving coatings of in particular high hardness, high glass transition temperature and surprisingly little tendency to yellowing.

Abstract: An amino-functional addition product from the reaction of at least one diamine of the formula (I) with at least one aromatic diepoxide in a stoichiometric ratio in the range of 1.3 to 1.7 mole diamine per 1 mole-equivalent of epoxy groups. The addition product is liquid at room temperature without a diluent and has surprisingly low viscosity. The composition allows the manufacture of low-emission epoxy-resin coatings that have good workability, cure particularly rapidly and with high surface quality in cold and damp conditions, and allow for a wide range of combinations with other amines and diluents.

Abstract: An amine-functional adduct from the reaction of an amine mixture containing at least one diamine of formula (I) and at least one diamine of formula (II) in a weight ratio ranging from 65/35 to 95/5 with at least one diepoxide in a stoichiometric ratio of at least 1. 2 moles of diamine of the formula (I) to 1 mole equivalent of epoxide groups. The adduct is liquid at room temperature without diluent even in the presence of a small excess of diamine and is surprisingly low in viscosity. In addition, it is particularly cost-effective, as it is available from an amine mixture that is technically easy to produce. The adduct enables low-emission or emission-free epoxy resin coatings with surprisingly good workability at surprisingly fast curing, which have a high hardness and low tendency to yellowing, and which hardly tend to blushing-related defects even in cold and humid conditions.

Abstract: A hardener for epoxy resins includes at least one amine of the formula (I) and an amine-functional adduct of at least one polyoxyalkylene polyamine and a diepoxide. The hardener enables transparent epoxy resin compositions of high clarity, which are free of toxic diluents such as nonylphenol, upon curing show a low heat generation but still cure fast and reliably and have a high robustness against yellowing. Such epoxy resin compositions are particularly suitable as casting resin for the manufacturing of transparent articles with a glass-like appearance.

Abstract: A curing agent for epoxy resin compositions containing at least one amine of formula (I) and at least one amine of formula (II). The curing agent is a low-odor, low-viscosity, low-toxicity curing agent and has a low propensity for carbamatization and a high reactivity toward epoxy resins. It enables low-odor and low-emission epoxy resin products which are readily processable and which even at low temperatures and high humidities undergo rapid and problem-free curing to afford high-quality plastics having a high hardness and a regular, non-tacky surface with high gloss.

Abstract: A hardener for epoxy resins, containing at least one amine A1 of formula (I) and at least one amine A2 of formula (II), the weight ratio of amine A1 to amine A2 ranging between 20/1 and 1/2. The hardener allows the manufacture of low-emission epoxy resin adhesives having good workability, a sufficiently long pot-life and open time with rapid curing, high strength, low brittleness, high adhesion, in particular to steel, and a sufficiently high glass transition temperature.