LASER-MARKING ADDITIVE

摘要

This invention relates to a laser-marking additive wherein the laser- marking additive comprises a bismuth containing compound and a functionalized polymer having 0.01 to 50 wt% of functional groups, in which the weight percentage is based on the total amount of functionalized polymer and bismuth containing compound. The invention further relates to a method for preparation of such laser- marking additive, a laser-markable composition comprising such laser-marking additives and preparation thereof and molded parts comprising the laser-markable composition, as well as films made from the laser-markable composition.