G materials process for the manufacture of impact resistant thermoplastic mouldin

Abstract

Abstract PRODUCTION OF IMPACT-RESISTANT THERMOPLASTIC MOULDING COMPOSITIONS. BETWEEN 90 AND 97 WEIGHT PERCENT OF A MIXTURE OF 40 TO 95 WEIGHT PERCENT POLYVINYL CHLORIDE AND 5 TO 60 WEIGHT PERCENT TERPOLYMER BASED ON ACRYLONITRILE-BUTADIENE-STYRENE AND THEIR DERIVATIVES, ARE INIMATELY BLENDED WITH 1 TO 4 WEIGHT PERCENT DIALKYL-TIN-MERCAPTIDE STABILISER AND 2 TO 6 WEIGHT PERCENT LUBRICANT, WHICH ESSENTIALLY CONTAINS HYDROCARBONS WITH AT LEAST 16 C ATOMS; AND THE RESULTING BLEND IS MADE INTO A MOULDING COMPOSITION. THE TERPOLYMER USED IS PRODUCED BY POLYMERIZING BUTADINEE, IN A FIRST STEP, WITH A VINYL COMPOUND IN AQUEOUS EMULSION, IN CONTACT WITH 0.1 TO 1 WEIGHT PERCENT CUSTOMARY CATALYST AND AT MOST 0.2 WEIGHT PERCENT EMULSIFER, BASED ON THE AMOUNT OF DIENE AND VINYL COMPOUNDS USED, AT A TEMPERATURE OF BETWEEN -20C. AND +100*C., TO GIVE AN ELASTOMERIC COPOLYMER; REACTING THE SAID COPOLYMER, IN A SECOND STEP WITH A VINYL MONOMER, SUCH AS STYRENE, A-METHYLSTYRENE OR MIXTURES OF THESE COMPOUNDS WITH ACRYLONITRILE OR METHACRYLONITRILE, IN AQUEOUS EMULSION, TO GIVE A GRAFT POLYMER; AND BLENDING THE GRAFT POLYMER IN A THIRD STEP WITH A COPOLYMER BASED ON THE SECOND STEP VINYL COMPOUNDS TO FORM THE FINAL COPOLYMER.

Inventors

• 👤 A Czekay
• 👤 B Kramer
• 👤 H Weiden

Bibliographic Details