Composites with good mechanical and tribological properties, useful e.g. for injection molding, comprise fine barium sulfate particles in (thermo)plastic and/or epoxy resin matrix

摘要

New composites (I), of filler and pigment in polymer matrix type, contain (a) at least one of thermoplastics, high performance plastics and/or epoxy resins and (b) barium sulfate (BaSO 4) of average crystal size d 50 less than 350 (preferably 3-50) nm, optionally having an (in)organically modified surface. An independent claim is included for the production of (I), by producing a masterbatch from (b) and part of (a), then diluting with (a) while dispersing.