| abstract |
Pigments and compositions for use in laser marking are disclosed. A colorless UV absorbing pigment is disclosed that is at least partially coated with a synergist having the formula:n n n [R m (SiO n )] p R ' q' n n n (A) m is 1-3, n is 1-3, p is 1 or more, q is 0-3;n n n (b) at least one R or R 'is a substituent that produces a black substance suitable for providing a mark upon pyrolysis.n n n The pigments are useful for fluoropolymers used in conductor and cable insulation. |