PROCESS FOR THE PRODUCTION OF THERMOPLASTIC POLYVINYLCHLORIDE MOLDING MATERIAL

• Main Authors: BORDEIANU RADU, STIENEKER AXEL, STURM HARALD, NEU THOMAS, SCHMITT WILHELM FRIEDRICH
• Format: Patent
• Language: English; Slovak
• Published: 05.03.2002
• Edition: 7
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

A process for the production of thermoplastic polyvinyl chloride molding compositions comprises modification with a core-shell modifier comprising a polyvinyl chloride or vinyl chloride copolymer core and a cross-linked alkyl acrylate- or alkylmethacrylate homo- or copolymer shell and the graft polymerization of the vinyl chloride monomer is carried out in the presence of the toughening agent. A process for the production of thermoplastic polyvinyl chloride (PVC) molding compositions (I) modified with an elastomer containing a core-shell modifier (II), having improved impact and corner strength and improved surface gloss is characterized such that the core of the toughening agent comprises polyvinyl chloride or vinyl chloride copolymer and the shell comprises cross-linked alkyl acrylate- or alkylmethacrylate homo- or copolymers and the graft polymerization of the vinyl chloride monomer is carried out using a suspension process in the presence of the toughening agent. An Independent claim is included for a thermoplastic PVC composition (I) containing 2-80 wt.% of the core-shell modifier (II).