| 摘要 |
The instant invention relates to a process for the warp-free pigmenting of polyolefins, which process comprises admixing coated pigment particles with a polyolefin, wherein said coated pigment particles are prepared by coating organic pigment particles with one or more films of a preformed polymer by adsorption thereon of from 1 to 10% by weight of the polymer, based on the pigment particles, at room temperature, the polymer being selected from the group consisting of polyvinylpyrrolidone homopolymers and copolymers.
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