Glass fiber impregnating compound as well as preparation method, product and application thereof

The invention provides a glass fiber impregnating compound which comprises effective components and water, and the solid content is 5.0%-8.0%; the effective components comprise a silane coupling agent, a film-forming agent, a lubricant, a surfactant, an interface enhancer, a cross-linking agent, a wetting agent and a pH value regulator; the impregnating compound comprises the following effective components in percentage by mass: 7%-25% of silane coupling agent, 43%-80% of film-forming agent, 5%-16% of lubricant, 1%-7% of surfactant, 1%-5% of interface enhancer, 1%-5% of cross-linking agent, 2%-6% of wetting agent and 1%-7% of pH value regulator. Glass fiber yarns produced by adopting the impregnating compound are good in bundling property, the yarns are soft, easy to disperse and less in hairiness after being tensioned, the impregnating speed in dicyclopentadiene resin is very high, and the impregnating effect is good; meanwhile, the preparation method is suitable for weaving and pultrusion processes, and the