TWO COMPONENT (2K) COMPOSITION BASED ON MODIFIED EPOXY RESIN

    公开(公告)号:US20220025105A1

    公开(公告)日:2022-01-27

    申请号:US17493582

    申请日:2021-10-04

    摘要: The present invention is directed to a two component (2K) composition comprising: (A) a first component comprising: a) at least one elastomer modified epoxy resin; b) at least one internally flexibilized epoxy resin which is characterized by a Shore D hardness, as measured with a durometer in accordance with ASTM D2240, of ≤45 when cured with diethylene triamine; c) at least one chelate modified epoxy resin; and d) optionally at least one epoxy resin different from said resins a) to c); and, (B) a second component comprising: e) a curative which consists of at least one compound possessing at least two epoxide reactive groups per molecule, said curative being characterized by comprising at least one Mannich base.

    Epoxy resin composition, prepreg, and carbon fiber-reinforced composite material

    公开(公告)号:US10400076B2

    公开(公告)日:2019-09-03

    申请号:US14896865

    申请日:2014-07-10

    摘要: An epoxy resin composition including [A1] a hardener represented by Formula (1), and [B] an aromatic epoxy resin having tri- or higher functionality, wherein a carbon nuclear relaxation time T1C corresponding to a benzene ring carbon atom in the main backbone of Formula (1) assigned to 130 ppm in a solid-state 13C-NMR spectrum is 42 seconds or longer, and a prepreg and a carbon fiber-reinforced composite material obtained using the epoxy resin composition: wherein X represents any one selected from —CH2—, —O—, —CO—, —C(═O)O—, —S—, —SO2—, and —NHC(═O)—; n represents 1 to 5; and R1 to R6 each represent at least one selected from the group consisting of a hydrogen atom, an aliphatic hydrocarbon group having 1 to 4 carbon atoms, an alicyclic hydrocarbon group having 4 or less carbon atoms, and an a halogen atom, wherein when X is —C(═O)O— or —NHC(═O)—, X may be in either direction. Provided are an epoxy resin composition that provides a carbon fiber-reinforced composite material excellent in tensile strength and compression strength and suitable as a structural material, a prepreg, and a carbon fiber-reinforced composite material.

    FAST CURE EPOXY COMPOSITION FOR USE IN HIGH THROUGHPUT MANUFACTURING PROCESSES

    公开(公告)号:US20180291164A1

    公开(公告)日:2018-10-11

    申请号:US15761826

    申请日:2016-10-05

    摘要: An epoxy resin composition having a first epoxy resin component containing an oxazolidone; a second epoxy resin component; a latent hardener comprising dicyandiamide particles having a particle distribution in which at least 35% of the dicyandiamide particles have a particle size of less than 2 microns; and an epoxy soluble latent catalyst is provided. It has been found that the combination of the epoxy components, a latent hardener having dicyandiamide particles in which at least 35% of the dicyandiamide particles have a particle size of less than 2 microns, and an epoxy soluble latent catalyst provides an epoxy resin composition that provides a more homogeneous infusion of the resin into a fibrous material for forming a prepreg. As a result, faster cure of the epoxy resin composition is obtained, which in turn, reduces the mold cycle time for preparing molded articles and parts.