Process of manufacturing cross-linked molded articles
Abstract
Abstract IMPROVED PROCESS OF FORMING CROSS-LINKED THERMOPLASTIC POLYMER MOLDED ARTICLES BY MIXING THE THERMOPLASTIC AND A SUITABLE FREE RADICAL INITATING CROSS-LINKING AGENT, BOTH IN SOLID FORM, AT A TEMPERATURE BELOW THE ACTUATION TEMPERATURE OF THE FREE RADICAL GENERATOR AND BELOW THE HEAT PLASTICIZATION TEMPERATURE OF THE THEROPLASTIC POLYMER; INJECTING SUCH MIXTURE THROUGH A NOZZLE INTO A PREHEATED MOLD UNDER SUCH CONDITIONS AS TO HEAT THE MOLDING MATERIAL MIXTURE PASSING THROUGH THE NOZZLE TO A TEM- PERATURE WHICH IS ABOVE THE ACTIVATION TEMPERATURE OF THE FREE RADICAL GENERATOR AND ABOVE THE MELTING POINT OF THE THERMOPLASTIC POLYMER; AND HOLDING THE MOLDING MATERIAL MIXTURE IN THE MOLD AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO AT LEAST INTIATE CROSS-LINKING AND FORMATION OF SAID MOLDED ARTICLE.
Inventors
- 👤 Eberhard Hinz
- 👤 Helmut Kaufer
- 👤 Reiner Theobald
Bibliographic Details
Claims Analysis
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