申请人:Reichhold AS
公开号:US10017614B2
公开(公告)日:2018-07-10
The present invention relates to an epoxy-resin composition as matrix component for sheet molding compounds (SMC) and/or bulk molding compounds (BMC), comprising a resin component comprising at least one epoxy resin and a hardener component comprising at least one imidazole compound and at least one latent hardener. In said epoxy-resin composition, the amount of the imidazole compounds used is in the range from 0.007 to 0.025 mol per mole of epoxy groups of the entire composition, and the total amount of primary amine groups optionally comprised does not exceed a proportion of 0.09 mol per mole of epoxy groups of the entire composition. The invention also relates to a fiber-matrix-semifinished-product composition (SMC composition or BMC composition) with, as matrix component, the epoxy-resin composition mentioned, and with, suspended therein, short reinforcement fibers with an average length of from 0.3 to 5.0 cm. The fiber-matrix-semifinished-product composition can be produced via mixing of the constituents, whereupon the composition thickens. The resultant thickened product (semisolid fiber-matrix semifinished product) features comparatively short maturing time and comparatively long available operating time. The invention also relates to the corresponding semisolid fiber-matrix composite, in particular to the semisolid SMC and to the corresponding cured fiber-matrix semifinished product, in particular the cured SMC. Finally, the invention also relates to a screening process for identifying epoxy-resin-based compositions which are suitable for use as thermoset matrix for producing SMC.
本发明涉及一种作为片状模塑料(SMC)和/或块状模塑料(BMC)基质成分的环氧树脂组合物,包括至少由一种环氧树脂组成的树脂成分和至少由一种咪唑化合物和至少一种潜在固化剂组成的固化剂成分。在所述环氧树脂组合物中,咪唑类化合物的用量为整个组合物中每摩尔环氧基团 0.007 至 0.025 摩尔,而可选的伯胺基团的总量不超过整个组合物中每摩尔环氧基团 0.09 摩尔。本发明还涉及一种纤维-基质-半成品组合物(SMC 组合物或 BMC 组合物),其基质成分为上述环氧树脂组合物,其中悬浮有平均长度为 0.3 至 5.0 厘米的短增强纤维。纤维-基质-半成品组合物可以通过混合这些成分来生产,然后组合物会变稠。由此产生的增稠产品(半固态纤维基质半成品)具有相对较短的成熟时间和相对较长的可用操作时间。本发明还涉及相应的半固态纤维基复合材料,特别是半固态 SMC,以及相应的固化纤维基半成品,特别是固化 SMC。最后,本发明还涉及一种筛选工艺,用于确定适合用作生产 SMC 的热固性基体的环氧树脂基组合物。