Disclosed herein are compositions including (a) a first component comprising (1) an epoxy-adduct that is the reaction product of reactants comprising a first epoxy compound, a polyol, and an anhydride and/or a diacid and (2) a second epoxy compound; (b) rubber particles having a core/shell structure and/or graphenic carbon particles; and (c) a second component that chemically reacts with the first component at ambient or slightly thermal conditions. Also disclosed herein are compositions including (a) an epoxy-capped flexibilizer; (b) a heat-activated latent curing agent; and optionally (c) rubber particles having a core/shell structure and/or graphenic carbon particles; (d) an epoxy/CTBN adduct; and/or (e) an epoxy/dimer acid adduct. The heat-activated latent curing agent may include at least one reaction product of reactants including an epoxy compound and an amine and/or an alkaloid.

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.

An adherable element is disclosed, comprising a decorative element having a support surface, and a pressure activated adhesive system pre-coated on the support surface of the decorative element for adhering the decorative element to a surface, the adhesive remaining uncured until activated by application of a threshold pressure. The adhesive comprises a matrix comprising a hardener and a plurality of microcapsules filled with an adhesive resin, the microcapsules being configured to rupture on application of the threshold pressure, thereby exposing the resin to the matrix and allowing the resin to react with the hardener to form an adhesive bond between the decorative element and the surface. The matrix may further comprise a rheology additive such that the matrix has a higher viscosity than the hardener at room temperature. Methods of making an adherable element, and decorative articles comprising the adherable element are also disclosed.

The invention relates to a comb polymer having repeating units of at least one of the structures of formulae (I) to (IV) wherein R.sup.1 represents a polyoxyalkylene group and A represents an organic group, and wherein the comb polymer has end groups of the general formula (V) wherein R.sup.2 and R.sup.3 independent of each other are selected from a) organic groups having 1 to 24 carbon atoms and b) R.sup.1.

##STR00001##

Disclosed herein is an aqueous coating composition containing an aqueous epoxy resin dispersion, an aqueous amine-functional resin dispersion and an aromatic carboxylic acid. The aqueous dispersion contains at least one specific di- and/or polyfunctional monomeric amine and at least one resin component including at least one specific polyfunctional organic amine. Further disclosed herein is a kit-of-parts including a base varnish containing the aqueous epoxy resin dispersion and a curing component containing the aqueous amine-functional resin dispersion as well as the aromatic carboxylic acid. Additionally disclosed herein is a process for producing a coating on the substrate as well as coated substrates resulting from said process. Cured coating layers formed from said compositions exhibit a good adhesion to the substrate as well as a high intercoat adhesion and blistering stability under humidity conditions without negatively influencing the excellent sandability and the good stone chipping properties.

Provided are a prepreg in which reinforcing fibers are impregnated with an epoxy resin composition containing an epoxy resin (A) and an epoxy resin curing agent (B) containing a reaction product (X) of a component (x1) and a component (x2) described below, a fiber-reinforced composite material that is a cured product of the prepreg, a method for producing the prepreg, and a method for producing a high-pressure gas storage tank.

(x1) At least one selected from the group consisting of meta-xylylenediamine and para-xylylenediamine

(x2) At least one selected from the group consisting of unsaturated carboxylic acids represented by General Formula (1) below and derivatives thereof.

##STR00001##

(In Formula (1), R.sup.1 and R.sup.2 each independently represent a hydrogen atom, an alkyl group having from 1 to 8 carbons, an aryl group having from 6 to 12 carbons, or an aralkyl group having from 7 to 13 carbons.)

A composition including cement, filler, polymer and a compound having epoxide groups and also an amine, wherein the composition contains more than 10% by weight of cement and at room temperature is present as storage-stable free-flowing powder and/or granular material. When mixed with water, the composition makes polymer-modified mortars having good processability, excellent adhesion, strength, water impermeability, chemical resistance and quick coatability possible.

An object of the present invention is to provide an epoxy amine adduct, a curing catalyst, a resin composition, a sealing material, an adhesive agent, and a cured product, which have good characteristics. There is prepared an epoxy amine adduct in which a value of (melting onset temperature at a temperature increasing rate of 50° C./min)/(melting onset temperature at a temperature increasing rate of 10° C./min) in differential scanning calorimetry (DSC) is 1.00 or more and 1.10 or less. There are prepared a curing catalyst for epoxy resin containing the epoxy amine adduct, a resin composition containing the curing catalyst, a sealing material or an adhesive agent each containing the resin composition, and a cured product obtained by curing the resin composition.

The invention relates to a process for cationic electrodeposition coating using cationic water-dilutable binders comprising a water-soluble bismuth salt or chelate complex B, and a chain-extended epoxy-amine adduct EA which comprises moieties derived from epoxide compounds E2 having at least two epoxide groups per molecule, low molar mass epoxide compounds E3 having two epoxide groups per molecule, one or more of amidoamines A41 having at least one amide group and at least one amino group, made from amines A1 having at least two amino groups per molecule and a fatty acid A4, further amines A1, an amine A2 which has at least one secondary amino group per molecule, an amine A3 having at least one tertiary, and at least one primary amino group per molecule, fatty acids A4, and phenolic compounds A5 having at least two phenolic hydroxyl groups.

An electrochemical oxygen sensor includes a sensing surface having a working electrode and a reference electrode, a hydrophilic layer formed from an oxygen diffusion-limiting layer emulsion overlaying the working electrode and a hydrophobic membrane formed from a hydrophobic solution disposed over the hydrophilic layer. The hydrophilic layer contains an epoxy network and a hydrophilic polymer. The hydrophobic layer contains an acetate copolymer and a cross-linking agent that reacts with the liquid epoxy resin in the hydrophilic layer forming the epoxy network where the hydrophobic member is water vapor and oxygen permeable.