| 摘要 |
Pigments and compositions for use in laser marking. A colorless UV-absorbing pigment at least partially coated with a synergist has the formulawherein (a) m is 1 to 3, n is 1 to 3, p is at least 1, and q is 0 to 3, and (b) at least one R or R' is a substituent that upon pyrolysis generates a black material suitable for providing a mark. Such pigments are useful in fluoropolymers used for wire and cable insulation.
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