| abstract |
A method of making antistatic, expandable, thermoplastic polymer particles by mixing and forming a polymer melt from the components A) from 45 to 97.8% by weight, preferably from 55 to 78.1% by weight, of a styrene polymer, B1) from 1 to 45% by weight, preferably from 7 to 15% by weight, of a polyolefin with a melting point in the range of from 105 to 140 ° C., determined by means of DSC at a heating rate of 10 ° C./minute, B2) from 0 to 25% by weight, preferably from 5 to 10% by weight, of a polyolefin with a melting point below 105 ° C. determined by means of DSC at a heating rate of 10 ° C./minute, C1) from 0.1 to 25% by weight, from 6 to 15% by weight of a styrene-butadiene or styrene-isoprene block copolymer, C2) from 0.0 to 10% by weight, preferably from 0.8 to 3% by weight, of a styrene-ethylene-butylene block copolymer, D) 1 to 5% by weight, preferably 3 to 4.5% by weight of a blowing agent, E) 0 to 5 wt .-%, preferably 0.3 to 2 weight percent of a nucleating agent, and F) 0.1 to 5 wt .-%, preferably 1 to 3 wt .-% of a wax, wherein the sum of A) to F) gives 100 wt .-%, and Extruding the polymer melt through a die plate followed by underwater granulation, the antistatic, expandable, thermoplastic polymer particles obtainable by the process and their processing into antistatic particle foam moldings. |