Abstract: 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.

Abstract: A resin composition is comprised of an epoxy resin comprised of a solid epoxy resin and a liquid polyurethane toughener that is dissolved in the epoxy resin and, upon curing of the liquid epoxy resin, the liquid polyurethane toughener phase separates into particles having a particle size of 50 nm to 2 micrometers, an epoxy hardener; and an epoxy soluble latent catalyst. The resin composition provides a more homogeneous infusion of the resin into a fibrous material for forming a prepreg and ultimately an epoxy fiber reinforced composition with improved toughness without sacrificing speed of impregnation or uniformity of the epoxy matrix within the composite.

Abstract: 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.

Abstract: The present invention provides thermosetting resin pre-impregnated or infused fiber materials or prepregs comprising a fiber material of a heat resistant fiber, such as a continuous fiber material or a discontinuous chopped fiber mat, infused with a thermosetting resin mixture comprising (i) at least one liquid epoxy resin; (ii) at least one epoxy novolac resin, (iii) dicyandiamide and (iv) and an adduct of a cycloaliphatic amine and a liquid epoxy resin, wherein the dicyandiamide is dissolved in the adduct of a cycloaliphatic amine and a liquid epoxy resin. The prepreg or fiber material has a shelf life of at least 30 days at ambient temperature and pressure before its Initial Tg (DSC) rises above 40° C.

Abstract: An epoxy resin composition useful for making a molded composite article including: (a) at least one epoxy resin compound, (b) at least one curing agent, (c) at least one curing accelerator, (d) at least one internal mold release agent; and (e) at least one reaction inhibitor; and a molded composite article made from the above epoxy resin composition.

Abstract: Disclosed is a toughened epoxy composition comprising (a) a first epoxy component comprising one or more epoxy resins having at least one oxazolidone ring structure; and (b) a second epoxy component comprising one or more liquid epoxy resins; (c) one or more latent epoxy curing agents; (d) one or more rubber toughening agents and (e) one or more phenoxy resin toughening agents.

Abstract: A resin composition is comprised of an epoxy resin comprised of a solid epoxy resin and a liquid polyurethane toughener that is dissolved in the epoxy resin and, upon curing of the liquid epoxy resin, the liquid polyurethane toughener phase separates into particles having a particle size of 50 nm to 2 micrometers, an epoxy hardener; and an epoxy soluble latent catalyst. The resin composition provides a more homogeneous infusion of the resin into a fibrous material for forming a prepreg and ultimately an epoxy fiber reinforced composition with improved toughness without sacrificing speed of impregnation or uniformity of the epoxy matrix within the composite.

Abstract: The present invention provides thermosetting resin pre-impregnated or infused fiber materials or prepregs comprising a fiber material of a heat resistant fiber, such as a continuous fiber material or a discontinuous chopped fiber mat, infused with a thermosetting resin mixture comprising (i) at least one liquid epoxy resin; (ii) at least one epoxy novolac resin, (iii) dicyandiamide and (iv) and an adduct of a cycloaliphatic amine and a liquid epoxy resin, wherein the dicyandiamide is dissolved in the adduct of a cycloaliphatic amine and a liquid epoxy resin. The prepreg or fiber material has a shelf life of at least 30 days at ambient temperature and pressure before its Initial Tg (DSC) rises above 40° C.

Abstract: A resin composition is comprised of an epoxy resin comprised of a solid epoxy resin and a liquid polyurethane toughener that is dissolved in the epoxy resin and, upon curing of the liquid epoxy resin, the liquid polyurethane toughener phase separates into particles having a particle size of 50 nm to 2 micrometers, an epoxy hardener; and an epoxy soluble latent catalyst. The resin composition provides a more homogeneous infusion of the resin into a fibrous material for forming a prepreg and ultimately an epoxy fiber reinforced composition with improved toughness without sacrificing speed of impregnation or uniformity of the epoxy matrix within the composite.

Abstract: An epoxy adhesive composition having a higher level (at or above 5 wt %) of a blocked tertiary amine catalyst, a urethane toughener, an epoxy resin modified with liquid rubber, a core shell rubber toughener and a combination of liquid and solid epoxy resins and the making thereof.

Abstract: A curable composition comprising (a) at least one epoxy resin; (b) at least one curing agent; (c) at least one core shell rubber toughening agent; and (d) at least one non-reactive diluent adapted for reducing the difference in temperature between Tg1 and Tg2; a curable epoxy adhesive composition comprising the above curable composition; and a cured product made from the curable composition.

Abstract: A curable epoxy adhesive composition including (a) at least one first epoxy resin; (b) at least one first diluent; (c) at least one first hardener; (d) at least a first hydrophilic filler that has a predetermined aspect ratio; (e) at least a second hydrophobic filler that is different from the first filler and that has a predetermined aspect ratio; and (f) at least a third filler that is different from the first and second fillers; wherein the third filler has a predetermined aspect ratio higher than the first filler and the second filer; and wherein the volume ratio of the third filler to the combination of the first filler and second filler is in the range of from 1:1 to 10:1 such as to minimize the thermal residual stresses of the cured product made from the curable composition.

Abstract: An epoxy system having a Part A and a Part B, where the Part A has an epoxy resin component present in a range of 20 weight percent (wt %) to 70 wt %, based on the total weight of the Part A; a flexibilizer present in a range from 20 wt % to 60 wt %, based on the total weight of the Part A; and a catalyst present in the range of 3 wt % to 7 wt % based on the total weight of the Part A, where the wt % of the components of the Part A of the epoxy system totals 100 wt %; and a Part B having a Mannich base hardener. Embodiments of the present disclosure also include a concrete structure that includes a reaction product of the epoxy system.