Method for preparing epoxy sheet mould plastic

Abstract

The invention provides a method for preparing an epoxy sheet-like mold plastic, which comprises the following steps: thickening the mixed epoxide resin system with diisocyanate compound; strengthening the chopped strand; making the tectorial into non-stick hand and shear epoxy sheet-like mold plastic, that is, preparing the epoxide resin paste and the epoxy sheet-like mold plastic; ripening. The epoxy sheet-like mold plastic comprises the following parts: 100 quetient mixed epoxide resin, 4-10 quetient deflocculating agent, 15-80 quetient curing agent, 5-20 quetient thickener, 1-4 quetient internal releasing agent, 80-180 filler and 50-150 fiber, wherein the intermediate core material of the epoxy sheet-like mold plastic comprises fiber which is dipped epoxide resin paste, and the up-down surface is covered by PE thin film. The epoxy sheet-like mold plastic is provided with the good heat flow property, the short curing time, the long saving time and the corrosion resistant, which can be made high strength epoxide composite material part.

Description

technical field

[0001] The invention relates to the field of materials, in particular to a method for preparing epoxy sheet molding compound and its products. Background technique

[0002] Compression molding process is an important composite material forming process, and sheet molding compound (SMC) is an important molding material for molding process. The middle core material of SMC is composed of glass fiber impregnated with resin paste, and the upper and lower sides are covered with PE film; the resin paste is composed of unsaturated resin, low shrinkage additive, curing agent, thickener, internal mold release agent and filler. The SMC sheet machine is impregnated with glass fiber to make a sheet, then rolled, and then thickened to a non-sticky state for molding. SMC sheet is a molded material developed in the 1960s to manufacture fiber-reinforced plastics by dry method. After more than 40 years of development, the SMC molding process has gradually developed into the mo...