A composition including an amidoamine curing agent composition or a polyamide curing agent composition are disclosed. The composition includes the reaction products of (1) an amine component including at least one multifunctional amine of structure (I):

##STR00001##

wherein each R is independently H or CH.sub.2CH.sub.2CH.sub.2NH.sub.2; R.sub.1 is H, CH.sub.3CH.sub.2CH.sub.2N—, C1-C21 alkyl, or C1-C21 alkenyl; n is 2; and m is 1 or 2, with (2) a fatty acid or ester component selected from the group consisting of a dimer fatty acid or ester component, a monofunctional fatty acid or ester component, and combinations thereof. The amidoamine curing agent composition remains as liquid at ambient temperature.

A composition including an amidoamine curing agent composition or a polyamide curing agent composition are disclosed. The composition includes the reaction products of (1) an amine component including at least one multifunctional amine of structure (I):

##STR00001##

wherein each R is independently H or CH.sub.2CH.sub.2CH.sub.2NH.sub.2; R.sub.1 is H, CH.sub.3CH.sub.2CH.sub.2N—, C1-C21 alkyl, or C1-C21 alkenyl; n is 2; and m is 1 or 2, with (2) a fatty acid or ester component selected from the group consisting of a dimer fatty acid or ester component, a monofunctional fatty acid or ester component, and combinations thereof. The amidoamine curing agent composition remains as liquid at ambient temperature.

Disclosed are a highly functional natural material-derived epoxy resin, a preparation method therefor, and an epoxy resin curing composition using the same. The highly functional natural material-derived epoxy resin represented by chemical formula 1 is obtained by reacting a compound, represented by chemical formula 2, and epichlorohydrin (ECH), which is obtained by using glycerin as a starting material, in the presence of a hydroxide salt.

Disclosed are a highly functional natural material-derived epoxy resin, a preparation method therefor, and an epoxy resin curing composition using the same. The highly functional natural material-derived epoxy resin represented by chemical formula 1 is obtained by reacting a compound, represented by chemical formula 2, and epichlorohydrin (ECH), which is obtained by using glycerin as a starting material, in the presence of a hydroxide salt.

A composition includes a polythiol having more than one thiol group, a polyepoxide having more than one epoxide group, an amine catalyst, and conductive filler. The conductive filler is at least one of thermally conductive or electrically conductive. The conductive filler is present in an amount to provide a thermal conductivity of at least 0.95 W/m′K, and/or the conductive filler is present in an amount of greater than 80 percent by weight, based on the total weight of the composition. A polymer network, which can be prepared from the composition, and a method for making the polymer network are also disclosed.

A polyamideimide resin composition comprises a polyamideimide resin and a solvent containing a compound represented by formula (1). In the formula, R.sup.1 represents an alkyl group of 1 to 8 carbon atoms, R.sup.2 and R.sup.3 each independently represent a hydrogen atom or an alkyl group of 1 to 8 carbon atoms, and X represents an alkylene group of 1 to 8 carbon atoms.

##STR00001##

Methods and materials for sand control in water injection sites are disclosed. Proppant particles may be coated with some particles coated with a solid epoxy and other proppant particles coated with a solid epoxy curative (such as amine, hydroxyl, carboxyl, anhydride) that would bind the particles through an epoxy reaction. The invention may be advantageous for forming underground structures useful in the extraction of hydrocarbons.

Methods and materials for sand control in water injection sites are disclosed. Proppant particles may be coated with some particles coated with a solid epoxy and other proppant particles coated with a solid epoxy curative (such as amine, hydroxyl, carboxyl, anhydride) that would bind the particles through an epoxy reaction. The invention may be advantageous for forming underground structures useful in the extraction of hydrocarbons.

A flame retardant epoxy resin composition for preparing a flame retardant fiber composite including: (a) at least one epoxy resin; (b) at least one flame retardant agent for improving the flammability performance of carbon fiber-reinforced epoxy composites; (c) at least one mold release agent; (d) at least one curing agent; and (e) at least one catalyst; a prepreg prepared using the above epoxy resin composition; and a flame retardant fiber composite prepared using the above prepreg.

A flame retardant epoxy resin composition for preparing a flame retardant fiber composite including: (a) at least one epoxy resin; (b) at least one flame retardant agent for improving the flammability performance of carbon fiber-reinforced epoxy composites; (c) at least one mold release agent; (d) at least one curing agent; and (e) at least one catalyst; a prepreg prepared using the above epoxy resin composition; and a flame retardant fiber composite prepared using the above prepreg.