| 摘要 |
IN THE PREPARATION OF TOUGHENED THERMOPLASTICS OR POLYMER BLENDS CONTAINING TOUGHENED THERMOPLASTICS, THE THERMOPLASTICS OR THE POLYMER BLENDS COMPRISING A) FROM 5 TO 95BY WEIGHT OF AT LEAST ONE WATER-MOIST ELASTOMER COMPONENT A CONTAINING UP TO 60BY WEIGHT OF RESIDUAL WATER, B) FROM 5 TO 95BY WEIGHT OF AT LEAST ONE THERMOPLASTIC POLYMER B, C) FROM 0 TO 95BY WEIGHT OF AT LEAST ONE FURTHER POLYMER C, AND D) FROM 0 TO 70BY WEIGHT OF ADDITIVES D, BY MIXING THE ELASTOMER COMPONENT A WITH THE THERMOPLASTIC POLYMER B AND, IF PRESENT, THE FURTHER POLYMER C AND, IF PRESENT, THE ADDITIVES D IN AN EXTRUDER WITH MECHANICAL DEWATERING OF THE ELASTOMER COMPONENT A,THE COMPONENTS A, B, C AND D ARE FED TO AN EXTRUDER WHICH HAS AT LEAST TWO SCREWS ROTATING IN THE SAME DIRECTION OR IN OPPOSITE DIRECTIONS AND HAVING A SCREW DIAMETER DSCREW, AND, IN THE CONVEYING DIRECTION (DOWNSTREAM), THE EXTRUDER BEING ESSENTIALLY COMPOSED OF-AT LEAST ONE METERING SECTION IN WHICH ELASTOMER COMPONENT A IS FED TO THE EXTRUDER BY A METERING MEANS,-AT LEAST ONE SQUEEZE SECTION WHICH SERVES FOR DEWATERING THE ELASTOMER COMPONENT A AND CONTAINS AT LEAST ONE RETARDING ELEMENT AND IN EACH CASE AT LEAST ONE ASSOCIATED DEWATERING ORIFICE WHICH IS PRESENT UPSTREAM OF THE (FIRST) RETARDING ELEMENT BY A DISTANCE CORRESPONDING TO AT LEAST ONE SCREW DIAMETER DSCREW,-AT LEAST ONE FEED SECTION IN WHICH THE THERMOPLASTIC POLYMER B IS INTRODUCED AS A MELT INTO THE EXTRUDER,-AT LEAST ONE PLASTICATION SECTION PROVIDED WITH MIXING AND/OR KNEADING ELEMENTS,-AT LEAST ONE DEVOLATILIZATION SECTION WHICH IS PROVIDED WITH AT LEAST ONE DEVOLATILIZATION ORIFICE AND IN WHICH THE REMAINING WATER IS REMOVED AS STEAM, AND-A DISHARGE ZONE, SOME OR ALL OF THE WATER EMERGING FROM THE DEWATERING ORIFICES IS PRESENT IN THE LIQUID PHASE, AND THE COMPONENTS C AND/OR D ARE FED TO ONE OR MORE OF THE STATED EXTRUDER SECTIONS TOGETHER OR SEPARATELY FROM ONE ANOTHER, EITHER TOGETHER WITH THE COMPONENTS A AND/OR B OR SEPARATELY FROM A AND B.
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