| 摘要 |
The present invention is directed to prepregs, laminates and printed circuit boards comprising fine particle size melamine cyanurate or a mixture of fine particle size melamine cyanurate and fine particle size melamine polyphosphate as a flame retardant. The present prepregs, laminates and printed circuit boards exhibit excellent flame retardancy as measured by UL 94 standards, low dielectric constant, good electrical, thermal and mechanical properties as well as good machinability, low density and a uniform appearance. The prepregs, laminates and printed circuit boards advantageously also contain certain phosphinate and/or diphosphinate flame retardants. The compositions are also advantageously free of halogen and antimony compounds.
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