Curable compositions are provided including a curable system that requires a thermally generated amine to cause curing of the system, and a self-assembled particle distributed in the curable system. The curable system contains at least one reactive moiety and the self-assembled particle comprises a reactive amine ionically bound to a chromonic network. A multilayer article is also provided, including a substrate, a chromonic amine layer disposed on the substrate, and a curable layer disposed on the chromonic amine layer. Methods of making a cured composition and of adhering two substrates together are further provided.

Various embodiments include a potting compound comprising: a sterically hindered epoxy resin; and a hardener including a basic compound having a pKB, measured in anhydrous acetonitrile, of 23 or higher.

Curable compositions are provided including a curable system that requires a thermally generated amine to cause curing of the system, and a self-assembled particle distributed in the curable system. The curable system contains at least one reactive moiety and the self-assembled particle comprises a reactive amine ionically bound to a chromonic network. A multilayer article is also provided, including a substrate, a chromonic amine layer disposed on the substrate, and a curable layer disposed on the chromonic amine layer. Methods of making a cured composition and of adhering two substrates together are further provided.

The present invention relates to the use of substituted benzyl alcohols as modifiers in epoxy systems.

Disclosed is an anhydride-free insulation system for current-carrying construction parts of an electric engine which comprises: (A) a mica paper or mica tape for wrapping parts of said electric engine that are potentially current-carrying during operation of the engine, which mica paper or mica tape is impregnable via vacuum pressure impregnation with a thermally curable epoxy resin formulation and comprises a complex of boron trihalogenide with an amine of the formula

BX.sub.3.Math.NR.sup.1R.sup.2R.sup.3 or R.sup.1R.sup.2NANR.sup.1R.sup.2, wherein X denotes halogen, R.sup.1, R.sup.2 and R.sup.3 are each independently of the others hydrogen, C.sub.1-C.sub.12alkyl, C.sub.5-C.sub.30aryl, C.sub.6-C.sub.36aralkyl or C.sub.6-C.sub.14cycloalkyl, which can be unsubstituted or substituted by one or more C.sub.1-C.sub.12alkyl groups, A is a bivalent aliphatic aromatic or cycloaliphatic radical; (B) a thermally curable bath formulation for the vacuum pressure impregnation comprising bisphenol A diglycidyl ether and optionally bisphenol F diglycidyl ether, which formulation is substantially or, preferably, entirely free of thermally activatable curing initiators for the epoxy resin formulation.

A two-part adhesive is provided comprising: A) a curative part comprising: i) one or more epoxy curatives, where the one or more epoxy curatives include norbornane diamine (NBDA); and ii) a reaction intermediate which is the reaction product of a liquid epoxy resin having an epoxy functionality of 2 with an excess of the epoxy curatives; and B) an epoxy part comprising: iii) one or more multifunctional epoxy resins having an epoxy functionality of greater than 2.2; in some embodiments epoxy functionality of greater than 2.6; in some embodiments epoxy functionality of 3 or greater; and in some embodiments epoxy functionality of 4 or greater. In some embodiments the one or more epoxy curatives additionally include 4,7,10 Trioxa-1,13-tridecane-diamine (TDD). In some embodiments the one or more multifunctional epoxy resins include tetraglycidyl methylenedianiline (TGMDA).

An epoxy resin composition, the epoxy resin composition including components (A1) to (C1) described below, wherein the content of the component (B1) is 8 to 20 parts by mass relative to 100 parts by mass of the component (A1), and the content of the component (C1) is 12 to 110 parts by mass relative to 100 parts by mass of the component (A1): component (A1): an epoxy resin; component (B1): a boron trihalide-amine complex; and component (C1): rubber particles.

The present invention provides a precursor curable composition including (a) at least one first epoxy resin; (b) at least one latent catalyst, (c) optionally, at least one curing agent, (d) optionally, at least one organic solvent, and (e) optionally, at least one second epoxy resin; wherein the thermal stability of the precursor curable composition when aged at 50 C for 16 days as measured by an increased 25 C viscosity from 0 percent to about 20 percent; and wherein, when the precursor curable composition is cured, the carbon yield of the cured precursor curable composition as measured by thermogravimetric analysis ranges from at least about 50 percent, based on the total weight of the cured composition without the optional organic solvent; a cured precursor composite material made from the above precursor curable composition; and a carbon-carbon composite product made from the above cured precursor composite material.

Aspects described herein generally relate to a material that is the reaction product of:

a binder;

a curing agent; and

a zinc pyrithione represented by the formula:

##STR00001##

R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, and R.sup.8 is independently hydrogen, alkyl, cycloalkyl, alkoxyl, hydroxyl, aryl, or heterocyclyl, uses thereof as a heatshield material, and heatshields.

A two-part adhesive is provided comprising: A) a curative part comprising: i) one or more epoxy curatives, where the one or more epoxy curatives include norbornane diamine (NBDA); and ii) a reaction intermediate which is the reaction product of a liquid epoxy resin having an epoxy functionality of 2 with an excess of the epoxy curatives; and B) an epoxy part comprising: iii) one or more multifunctional epoxy resins having an epoxy functionality of greater than 2.2; in some embodiments epoxy functionality of greater than 2.6; in some embodiments epoxy functionality of 3 or greater; and in some embodiments epoxy functionality of 4 or greater. In some embodiments the one or more epoxy curatives additionally include 4,7,10 Trioxa-1,13-tridecane-diamine (TDD). In some embodiments the one or more multifunctional epoxy resins include tetraglycidyl methylenedianiline (TGMDA).