Glass fiber impregnating agent as well as preparation method and application thereof

The invention provides a glass fiber impregnating agent. The glass fiber impregnating agent is prepared from components in percentage by mass as follows: 0.1%-2.0% of a coupling agent, 0.05%-2.0% of alubricating agent, 1.0%-10.0% of unsaturated polyester emulsion, 1.0%-10.0% of polyvinyl acetate emulsion, 2.0%-10.0% of epoxy emulsion, 1.0%-5.0% of an easy coloring agent, 0.05%-1.0% of a pH valueregulator and 60.0%-95.7% of water. With the adoption of the impregnating agent for coating glass fiber, physical and chemical properties of the glass fiber surface can be changed, liquidity, splitting performance and easy coloring performance of the glass fiber are effectively improved, compatibility of the glass fiber and matrix resin is improved, and a prepared coloring-grade SMC molded part material has the characteristics that the glass fiber distribution is uniform, the surface is smooth and free of lines, the mechanical performance is excellent and the like. 本发明提供了种玻璃纤维浸润剂，包含以下组分，所述各组分的含量以质量百分比表示如下：偶联剂0.1-2.0％；润