Prepreg and fiber-reinforced composite material
A technology of prepreg and reinforced fiber, applied in the field of prepreg and fiber reinforced composite material, can solve problems such as damage to appearance, and achieve the effects of low colorability, excellent appearance and high heat resistance
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Embodiment 1
[0129] As the epoxy resin of component [A], 80 parts by mass of "jER (registered trademark)" 154, 20 parts by mass of "Eporto (registered trademark)" YDF2001 were used, and as [B1] aromatic urea, 4 parts by mass of "Omicure (registered trademark)" 24 prepared an epoxy resin composition according to the above .
[0130] In all 100 parts by mass of epoxy in this epoxy resin composition, [A1] component was 66 mass parts, and [A1'] component was 54 mass parts. The water absorption rate of the epoxy resin composition when it stored at 85 degreeC and 95%RH for 2 hours was 1.7%.
[0131] From the obtained epoxy resin composition, a cured epoxy resin was produced according to the above . Regarding this epoxy resin cured product, Tg, flexural elastic modulus, and yellowness when Tg and 5 mass % of water were mixed and cured were measured. Tg was 129° C., Tg when cured by mixing water was 126° C., flexural modulus was 3.5 GPa, yellowness was 64, and the physical properties of the cure...
Embodiment 2~10
[0133] Except having changed the resin composition as shown in Table 1, respectively, the epoxy resin composition, epoxy resin hardened|cured material, and fabric CFRP were produced by the same method as Example 1. The mass parts of the [A1] component, the mass parts of the [A1'] component, and the water absorption rate when stored at 85° C. and 95% RH for 2 hours in 100 parts by mass of all epoxy in each example are shown in in FIG. 1.
[0134] Regarding each example, as described in Table 1, the Tg of the epoxy resin cured product, the Tg when it was cured by mixing water, the modulus of elasticity, the yellowness, and the appearance of the fabric CFRP were all good.
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