Abstract: A prepreg having at least one layer of carbon fibers and a curable thermosetting resin system, the curable thermosetting resin system at least partly impregnating the at least one layer of carbon fibers, wherein the curable thermosetting resin system includes: a curable thermosetting resin including at least one epoxide group, the curable thermosetting resin having an epoxy equivalent weight of from 140 to 180 g/eq; a curing agent for curing the curable thermosetting resin, wherein the curing agent is present in the liquid phase and includes a cyanamide reactive group; and a rheology modifier for the curable thermosetting resin system, wherein the rheology modifier includes at least one of a thermoplastic resin and an inorganic particulate thickener or a mixture thereof.

Abstract: A prepreg for the manufacture of a fiber-reinforced composite material, the prepreg including: i. an epoxy-resin matrix including: a. at least one non-halogenated epoxide-containing resin which has been chemically modified with at least one of a nitrogen- and/or phosphorous-containing molecule which has been chemically reacted with the epoxide-containing molecule; b. at least one toughening additive comprising an elastomeric or thermoplastic material chemically reacted with the at least one epoxide-containing resin; c. at least one mineral filler to provide fire-retardancy; and d. at least one catalyst for curing the epoxide-containing resin; and ii. a fibrous reinforcement at least partially impregnated by the epoxy resin matrix.

Abstract: A prepreg having at least one layer of carbon fibres and a curable thermosetting resin system, the curable thermosetting resin system at least partly impregnating the at least one layer of carbon fibres, wherein the curable thermosetting resin system includes: a curable thermosetting resin including at least one epoxide group, the curable thermosetting resin having an epoxy equivalent weight of from 140 to 180 g/eq; a curing agent for curing the curable thermosetting resin, wherein the curing agent is present in the liquid phase and includes a cyanamide reactive group; and a rheology modifier for the curable thermosetting resin system, wherein the rheology modifier includes at least one of a thermoplastic resin and an inorganic particulate thickener or a mixture thereof.

Abstract: A prepreg for the manufacture of a fibre-reinforced composite material, the prepreg including: i. an epoxy-resin matrix including: a. at least one non-halogenated epoxide-containing resin which has been chemically modified with at least one of a nitrogen- and/or phosphorous-containing molecule which has been chemically reacted with the epoxide-containing molecule; b. at least one toughening additive comprising an elastomeric or thermoplastic material chemically reacted with the at least one epoxide-containing resin; c. at least one mineral filler to provide fire-retardancy; and d. at least one catalyst for curing the epoxide-containing resin; and ii. a fibrous reinforcement at least partially impregnated by the epoxy resin matrix.

Abstract: A prepreg for manufacturing a fibre-reinforced composite material, the prepreg comprising a body comprising a layer of fibrous reinforcement impregnated with a matrix resin material, and a powder coating layer of resin material on at least one major surface of the body and adhered to the matrix resin material