RESIN COMPOSITIONS FOR FIBER-REINFORCED COMPOSITE MATERIALS AND PROCESSES FOR PRODUCING THE SAME, PREPREGS, FIBER-REINFORCED COMPOSITE MATERIALS, AND HONEYCOMB STRUCTURES

摘要

The present invention provides a prepreg excellent in self adhesiveness to a honeycomb core, low in porosity when used as skin panels, excellent in surface smoothness (low in surface porosity) when used as skin panels, and good in tackiness and drapability, and also provides a honeycomb sandwich panel high in skin panel peel strength and excellent in impact resistance and hot water resistance, and a resin composition for a fiber reinforced composite material to allow the above. The present invention has the following constitution. A resin composition for a fiber reinforced composite material comprising the components ÄAÜ, ÄBÜ and ÄCÜ are essential wherein the modulus of storage rigidity G' measured by parallel plates having vibration frequency of 0.5 Hz during elevation of temperature from 50 DEG C at 1.5 DEG C/min is in a range of 5 to 200 Pa in an entire range of 70 DEG C to 100 DEG C. A resin composition for a fiber reinforced composite material comprising the components ÄAÜ , ÄBÜ and ÄCÜ are essential, wherein the minimum modulus of storage rigidity G'min and the maximum modulus of storage rigidity G'max at 70 DEG C to 100 DEG C measured by parallel plates having vibration frequency of 0.5 Hz during elevation of temperature from 50 DEG C at 1.5 DEG C/min, satisfy the following relation: $A\; resin\; composition\; for\; a\; fiber\; reinforced\; composite\; material\; comprising\; the\; components\; ÄAÜ,\; ÄBÜ\; and\; ÄCÜ\; are\; essential,\; wherein\; the\; thixotropy\; index\; is\; in\; a\; range\; of\; 2.5\; to\; 40,\; the\; resin\; viscosity\; at\; 80\; DEG\; C\; measured\; by\; parallel\; plates\; having\; vibration\; frequency\; of\; 0.5\; Hz\; during\; elevation\; of\; temperature\; from\; 50\; DEG\; C\; at\; 1.5\; DEG\; C/min\; is\; in\; a\; range\; of\; 100\; to\; 1000\; poises,\; and\; the\; minimum\; value\; of\; resin\; viscosity\; during\; heating\; is\; 30\; to\; 400\; poises.\; A\; resin\; composition\; for\; a\; fiber\; reinforced\; composite\; material\; comprising\; the\; components\; ÄAÜ,\; ÄBÜ\; and\; ÄCÜ\; are\; essential,\; wherein\; solid\; rubber\; and\; fine\; silica\; particles\; are\; contained\; as\; component\; ÄCÜ\; by\; 1\; to\; 10\; wt\%,\; respectively,\; based\; on\; the\; total\; weight\; of\; the\; resin\; composition.\; The\; fiber\; reinforced\; composite\; material\; using\; the\; prepreg\; of\; the\; present\; invention\; can\; be\; used\; widely\; for\; airplanes,\; automobiles\; and\; other\; industrial\; applications,\; particularly\; as\; structural\; materials\; of\; airplanes,\; because\; of\; its\; excellent\; mechanical\; properties.$