Process for the production of expandable particles of styrene polymers
AssigneeEnichem S.p.A.
InventorsFrancesco Anfuso, Dario Ghidoni
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Abstract
Process for the production of expandable particles of styrene polymers, having improved processability characteristics, which comprises: i) producing expandable particles of styrene polymers containing from 2 to 20% of an expanding agent incorporated; ii) covering these particles with an antistatic agent in a quantity of less than 1% by weight; iii) vigorously frictioning the particles in a mixing apparatus in order to heat their surface, in a short time, by simple mechanical friction; iv) discharging the particles thus treated from the mixing apparatus.
Claims10
A process for the production of expandable particles of styrene polymers, having improved processability characteristics, which comprises:
- i) producing expandable particles of styrene polymers containing from 2 to 20% by weight of an expanding agent;
- ii) coating these particles with an antistatic agent in a quantity of less than 1% by weight;
- iii) subsequent to said coating, and in a separate step, vigorously frictioning the particles in a mixing apparatus in order to heat their surface, by simple mechanical friction alone;
- iv) discharging the particles thus treated from the mixing apparatus.
Dependencies are inferred from the claim text.