| abstract |
Provided are a phosphorous-containing silicon active ester and a preparation method therefor, a flame retardant resin composition, a prepreg and a metal foil-clad laminate. The phosphorous-containing silicon active ester of the present invention has a structure represented by formula (I), can act both as an active ester curing agent and as a halogen-free flame retardant, and can achieve a flame retardant effect of UL94 V-0 at a lower level of phosphorus content. |