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 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: A silane group-containing polymer obtained from reacting (i) an isocyanate group-containing polymer having an NCO content in the range of 0.3 to 4% by weight and a monomeric diisocyanate content of at most 0.3 wt. % obtained from the reaction of at least one monomeric diisocyanate with at least one polyether polyol in a molar NCO/OH ratio of at least 3/1 and subsequent removal of a major part of the unreacted monomeric diisocyanates by means of a suitable separation process, (ii) with at least one amino-, mercapto- or hydroxysilane in a stoichiometric ratio of at least 1 mole of amino-, mercapto- or hydroxysilane per mole equivalent of isocyanate groups.

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 branched polymer containing silane groups having an average of at least 2.1 silane groups per molecule, from the reaction of (i) a polymer containing isocyanate groups and having an NCO content ranging from 0.7% to 4% by weight, obtained from the reaction of at least one monomeric diisocyanate with at least one polyether polyol in a molar NCO/OH ratio of at least 1.5/1, (ii) with at least one amino-, mercapto- or hydroxysilane, in a stoichiometric ratio of at least 1 mol of amino-, mercapto- or hydroxysilane per molar equivalent of isocyanate groups. The polymer containing silane groups is storage-stable, liquid at room temperature and easily handled, and permits curable compositions having excellent processability, rapid curing, high strength coupled with good extensibility, and good thermal stability. It is particularly suitable as a constituent of moisture-curable sealants, adhesives or coatings, additionally including a further, in particular linear, polymer containing silane groups.

Abstract: A composition including: —at least one silane group-containing polymer with a silicon content ranging from 0.6 to 2 wt. %, obtained by reacting at least one isocyanate group-containing polymer and at least one amino-, mercapto-, or hydroxysilane, —at least one liquid epoxy resin, and—at least one polyamine with at least three amine hydrogens which are reactive towards epoxy groups. The composition facilitates adhesives, coatings, or sealing compounds with a good storage stability, a fast curing time, even in the event of moisture or humidity, a surprisingly high degree of strength while having a high degree of elasticity, a high degree of resistance against further tearing, a high degree of resistance in particular against glycol/water mixtures, and a high degree of adhesion to many substrates. When used on metals such as steel or aluminum, the composition protects same against corrosion.

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.

Abstract: A process for preparing a curing agent for epoxy resins, in which an amine mixture including at least one parent amine of the formula (I) and at least one alkylated amine of the formula (II) is reacted or adducted with at least one glycidyl ether of the formula (III). The amine mixture is especially a reaction mixture from the partial alkylation of the amine of the formula (I). The process described enables, with low energy expenditure and high space-time yield, curing agents of low odor, low toxicity, low viscosity and high reactivity for epoxy resins and epoxy resin products that cure rapidly at ambient temperatures and especially also under cold conditions and at the same time enable high-quality coatings having an even, shiny surface.

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: An epoxy resin composition, the curing components of which contain at least one amine of formula (I) and optionally at least one amine A which is, in particular, an adduct of a polyamine and an epoxide. The amine for formula (I) is used in particular in the form of a reaction product of the reductive alkylation of 1,2-ethylenediamine and an aldehyde or ketone. The epoxy resin composition is used in particular as a low-emission, room-temperature-curing epoxy-resin coating. It is characterised by good processibility, quick curing, high hardness, a nice surface and a low tendency to yellowing.

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 an amine of formula (I) as a component of a hardener for epoxy resins, hardeners for epoxy resins containing the amine of formula (I), and resultant epoxy resin compositions which can particularly be used as low-emission room-temperature-curing epoxy-resin coatings with high hardness and surface quality. The amine of formula (I) is low-odour and a very successful diluent for epoxy resin compositions. It is particularly obtained by reductive alkylation from 1,2-ethylenediamine or 1,2-propylenediamine and an aldehyde or ketone.

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, containing at least one amine adduct of formula (I) which can be obtained as an addition product of a mixture of a primary diamine, a monoalkylated other diamine and a polyepoxide. The curing agent makes it possible to produce low-odor, low-emission epoxy resin products, in particular coatings, which have a surprisingly low viscosity, a high curing rate, a high final hardness, and a surprisingly appealing surface.

Abstract: The use of an amine of formula (I) as a component of a hardener for epoxy resins, hardeners for epoxy resins containing the amine of formula (I), and resultant epoxy resin compositions which can particularly be used as low-emission room-temperature-curing epoxy-resin coatings with high hardness and surface quality. The amine of formula (I) is low-odour and a very successful diluent for epoxy resin compositions. It is particularly obtained by reductive alkylation from 1,2-ethylenediamine or 1,2-propylenediamine and an aldehyde or ketone.

Abstract: A composition including at least one polymer containing silane groups, at least one epoxy resin, and at least one amine of the formula (I). The composition is low in odor, low in toxicity, and highly workable. It enables low-emission products which cure rapidly at ambient temperature to form macroscopically homogeneous films or bodies having good mechanical properties, high thermal stability and good adhesion properties, the mechanical properties being able to be adjusted from very elastic through to tough elastic. The composition is especially suitable as adhesive and/or sealant or coating.