Verfahren zur Herstellung von Polymer-Formteilen aus nicht oder nur schlecht miteinander mischbaren Polymeren

EP 1710065 A2 UPAB: 20061204 NOVELTY - A method for the production of formed polymer parts (I) from immiscible or poorly-miscible polymers (A, B) where the second polymer (B) is dispersed as fine particles in the continuous phase (A), involves (a) mixing (A) with (B), both in the form of a liquid, melt or solution, (b) finely dispersing (B) in (A) by ultrasound treatment (UST) so that cavitation bubbles are formed in (A) and/or (B), and (c) solidifying the dispersion to the required (I) by cooling or hardening (A) and/or (B), preferably both. USE - For the production of formed parts from at least two mutually-incompatible polymers. ADVANTAGE - Enables the production of formed parts comprising a fine dispersion of one polymer in the continuous phase formed by another (incompatible) polymer, without the disadvantages associated with prior-art methods, e.g. health risks from handling fine particles (e.g. in emulsion or solution polymerisation, spraying low-viscosity polymer solutions or the RESS process), insufficient wetting of one polymer by the other, or the melting of fine particles with droplet-formation followed by phase separation