摘要:
An epoxy resin composition which completely cures in a shorter time even at low temperatures than conventional epoxy resin compositions, can retain a sufficient shelf life even in storage at room temperature, and is suitable for use in prepregs. The epoxy resin composition comprises a product of the reaction of an epoxy resin with an amine compound having at least one sulfur atom per molecule, at least one amine compound having at least one sulfur atom per molecule, a urea compound, and dicyandiamide, the content of sulfur atoms and content of the urea compound in the epoxy resin composition being 0.2 to 7 wt.% and 1 to 15 wt.%, respectively.
摘要:
The present invention relates to a method for producing a prepreg which contains reinforcing fibers and a matrix resin composition with the weight per square meter of the reinforcing fibers being 250-2,000 g / m 2 . The production method comprises the following steps (1)-(3): (1) a matrix resin composition blending step for obtaining a matrix resin composition by mixing an epoxy resin, a radically polymerizable unsaturated compound, an epoxy resin curing agent and a polymerization initiator that generates radicals, in said step the content of the radically polymerizable unsaturated compound relative to 100% by mass of the total of the epoxy resin and the radically polymerizable unsaturated compound being 10-25% by mass; (2) a matrix resin composition impregnating step; and (3) a surface viscosity increasing step.
摘要:
Provided is a method for producing a good epoxy resin composition for obtaining fiber-reinforced plastics. A production method for obtaining a fiber-reinforced composite material by impregnating a fiber assembly with an epoxy resin composition and then curing the epoxy resin composition, wherein the epoxy resin composition contains a component [A], a component [B] and a component [C] respectively satisfying the conditions described below. When the blending amount of the component [B] is set to b parts by mass and the blending amount of the component [C] is set to c parts by mass relative to 100 parts by mass of the component [A] contained in the epoxy resin composition, formula (2) is satisfied within the range of formula (1), formula (4) is satisfied within the range of formula (3), and formula (6) is satisfied within the range of formula (5). The epoxy resin composition is blended at a temperature of 60-80°C (inclusive).