Patent ID: 7771646

Claim:
A laser-markable molding composition comprising: (a) at least one semicrystalline thermoplastic polymer, wherein the at least one semicrystalline thermoplastic is present in an amount of 50 to 99.5% by weight based on the molding composition; and (b) at least one particulate additive comprising light-sensitive salt compounds; wherein the light-sensitive salt compounds comprise compounds having two or more captions wherein the two or more captions are derived from different elements and an anion selected from the group consisting of inorganic phosphorus-containing oxo anions, wherein at least one of the two or more captions is selected from the group consisting of Ti, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Nb, Mo, Ag, Sn, Sb, La, Pr, Ta, W, and Ce; and wherein at least another of the two or more captions is selected from the group consisting of elements of periods 3-6 of main groups II and III, elements of periods 5-6 of main group IV, elements of periods 4-5 of transition groups III-VIII, and the lanthanoids.