Organic polymer - calcium carbonate composite particles, hollow calcium carbonate particles, processes for their preparation, their use as fillers or additives in plastics and elastomers

摘要

Composite particles comprise a core of organic polymer coated at least partially with calcium carbonate and having a mean dia. of at most 5 mu m. Also claimed are hollow particles with a mean dia. of at most 5 mu m and with a calcium carbonate shell.