Powder comprising polymer-coated polymeric core particles

摘要

The invention relates to powder, comprising composite particles comprising core particles completely or partially coated with a precipitated first polymer, where the core particles comprise a second polymer which differs from the precipitated first polymer, and where the ratio of the d50 median diameter of the composite particles to the d50 median diameter of the core particles is 1.15 or greater. The invention further relates to processes of using the powders of the present invention to making moldings.

主权项

1. A powder, comprising composite particles, each composite particle comprising:
a core of a second polymer particle; and a complete or partial coating of a first polymer; wherein the second polymer is selected from the group consisting of a polycarbonate, a polymethyl methacrylate, a polypropylene, a polybutylene terephthalate, a polyethylene terephthalate, a polyether ether ketone and a polyphthalamide the second polymer is different from the first polymer a d50 median diameter of the composite particles is from 20 to 150 μm, a ratio of a d50 median diameter of the composite particles to a d50 median diameter of the core particles is from 1.15 to 30, and the coating of the first polymer on the core particle is obtained by precipitation of the first polymer onto the core particle, and the precipitated first polymer is selected from the group consisting of a polyolefin, a polyethylene, a polypropylene, a polyvinyl chloride, a polyacetal, a polystyrene, a polyimide, a polysulphone, a poly(N-methylmethacrylimide), a polymethyl methacrylate, a polyvinylidene fluoride, an ionomer, a polyether ketone, a polyaryl ether ketone, a polyamide, a copolyamide, and a mixture thereof.