Disclosed is a low-temperature curable composition comprising: (A) at least one curable component selected from an epoxy resin and a blocked isocyanate, and (B) an amine-based latent curing agent, wherein a temperature peak of a reaction of the amine-based latent curing agent (B) with a bisphenol A type epoxy resin is between 70° C. and 110° C.

An epoxy resin composition including A) at least one epoxy compound, and B) a hardener composition including B1) from 0.1%-100% by weight of 2-(2,2,6,6-tetramethylpiperidin-4-yl)propane-1,3-diamine, and B2) from 99.9%-0% by weight of at least one further diamine and/or polyamine, where the stoichiometric ratio of the epoxy groups of A) and the number of active hydrogen atoms of the functional groups of B) varies from 1:2 to 2:1.

A process for producing 2-(2,2,6,6-tetramethylpiperidin-4-yl)propane-1,3-diamine by A) reacting triacetonamine (TAA) and malononitrile to afford the intermediate 2-(2,2,6,6-tetramethylpiperidin-4-ylidene)malononitrile, and B) hydrogenating 2-(2,2,6,6-tetramethylpiperidin-4-ylidene)malononitrile in the presence of at least one catalyst. In another embodiment, the hydrogenation in step B) of the process is performed at 20-120° C. and at 20-300 bar. In another embodiment, the hydrogenation in step B) of the process is performed in two stages at 20-120° C. and at 20-300 bar.

Liquid epoxy curing agents that have improved latency over conventional liquid curing agents while retaining the physical properties of the cured material are disclosed. These liquid curing agents can be used for curing epoxy resins, or in combination with dicyandiamide (DICY) based curing agents in order to accelerate DICY curing.

The present invention relates to a low-alkylphenol composition comprising a) at least one epoxy resin, b) at least one amine having at least two secondary amino groups that are both part of an organic ring system, and c) at least one salt of a strong Brønsted acid with a counterion selected from metal ions, metal-containing ions, phosphonium ions and ammonium ions, to processes for production thereof and to the use thereof.

The present invention relates to a composition comprising a) at least one epoxy resin, b) at least one amine having at least two secondary amino groups which are both part of an organic ring system, and c) at least one salt of a very strong Brønsted acid with a counterion selected from metal ions, metal-containing ions, phosphonium ions and ammonium ions, and to processes for production thereof and use thereof.

The present invention provides a composition comprising a) at least one epoxy resin, b) at least one cyclic amine of the formula (I) ##STR00001##
in which R.sup.1 to R.sup.4 is H or an organic radical, with the proviso that at least one of the R.sup.1, R.sup.2, R.sup.3 and R.sup.4 radicals ═H, and
X═—(Y.sup.1).sub.m-(A.sup.1).sub.n-(Y.sup.2).sub.o-(A.sup.2).sub.p-(Y.sup.3).sub.q-(A.sup.3).sub.r-(Y.sup.4).sub.s—  (II) where, independently of one another, m, n, o, p, q, r and s=0 or 1, A.sup.1, A.sup.2, A.sup.3=alkylene or alkenylene radical and Y.sup.1, Y.sup.2, Y.sup.3, Y.sup.4═NR.sup.5, PR.sup.5, O or S, where R.sup.5 independently=organic radical, where any two organic radicals selected from R.sup.1 to R.sup.5 and any radicals present in the alkylene and/or alkenylene radicals A.sup.1, A.sup.2, A.sup.3 may also form one or more further rings, with the proviso that at least one of the radicals selected from R.sup.1 to R.sup.5 present and any radicals present in the alkylene and/or alkenylene radicals A.sup.1, A.sup.2, A.sup.3 is substituted by at least one —NHR.sup.6 or —NH.sub.2 group, where R.sup.6=organic radical, and
c) at least one salt of a strong Brønsted acid with a counterion selected from metal ions, metal-containing ions, phosphonium ions and unsubstituted ammonium ions,
where the ratio of the epoxy groups in the epoxy resin to the sum total of all NH groups in all amines is 0.5:1 to 1.5:1,
and to processes for production thereof and use thereof.

Solvent free epoxy system that includes: a hardener compound H comprising: a molecular structure (Y.sup.1—R.sub.1—Y.sup.2), wherein R.sub.1 is an ionic moiety Y.sup.1 is a nucleophilic group and Y.sup.2 nucleophilic group; and an ionic moiety A acting as a counter ion to R.sub.1; and an epoxy compound E comprising: a molecular structure (Z.sup.1—R.sub.2—Z.sup.2), wherein R.sub.2 is an ionic moiety, Z.sup.1 comprises an epoxide group, and Z.sup.2 comprises an epoxide group; and an ionic moiety B acting as a counter ion to R.sub.2. In embodiments, the epoxy compound E and/or the hardener H is comprised in a solvent-less ionic liquid. The systems can further include accelerators, crosslinkers, plasticizers, inhibitors, ionic hydrophobic and/or super-hydrophobic compounds, ionic hydrophilic compounds, ionic transitional hydrophobic/hydrophilic compounds, biological active compounds, and/or plasticizer compounds. Polymers made from the disclosed epoxy systems and their methods of used.

This base proliferating agent is represented by formula (1) or (2), where, in formula (1) and (2), R1, R2, and R3 independently represent a hydrogen atom or a substituent and n independently represents an integer from 1 to 4. A base-reactive resin composition can include this base proliferating agent and a base-reactive compound.

##STR00001##

The present disclosure relates to a curing composition comprising: a) a condensation product of at least one carboxylic acid having 20-60 carbon atoms and at least two carboxyl groups and/or at least one ester derived from a carboxylic acid having 20-60 carbon atoms and at least two carboxyl groups; and at least one polyoxyalkyleneamine, wherein the polyoxyalkyleneamine includes: I) at least two oxyalkylene moieties; and II) at least two primary amino groups; and b) at least one amine having at least one amino group. Also provided are an adhesive composition comprising the curing composition, usage of the adhesive, a turbine blade for wind energy comprising the adhesive composition, and a method for manufacturing the curing composition.