Two-component coating based on modified epoxy resin and preparation method of two-component coating

The invention discloses a two-component coating based on modified epoxy resin, wherein the two-component coating comprises a component A and a component B. The component A and the component B are mixed according to a mass ratio of (8.5-8.7):1. The component A comprises the following components in parts by weight: 60 to 70 parts of siloxanized epoxy resin, 1 to 1.5 parts of a polyphenol antioxidantand 4 to 5 parts of a filler; and the component B is prepared by mixing a curing agent, a reactive diluent and acetone according to a mass ratio of (8.5-8.9):(1.3-1.6):(2.1-2.4). A large number of siloxane bonds are introduced into the prepared siloxanized epoxy resin; the epoxy resin contains siloxane bonds, and the siloxane bonds in the coating prepared after curing uniformly exist in the matrix resin, so that the heat resistance of the prepared coating is uniform, and the problems of low heat resistance and low toughness of the epoxy resin coating in the prior art are solved. 本发明公开了一种基于改性环氧树脂的双组份涂料，包括A组分和B组分，其中A组分