STABILIZER FOR CHLORINE-CONTAINING POLYMERS AND CHLORINE-CONTAINING POLYMER COMPOSITION

摘要

THE PRESENT INVENTION RELATES TO A STABILIZER FOR CHLORINE-CONTAINING POLYMERS ACHIEVING A HIGH HEAT STABILIZING ACTION WITH A SMALL AMOUNT OF USE AND IMPARTING STRIKINGLY ENHANCED HEAT STABILITY. A CHLORINE-CONTAINING POLYMER COMPOSITION COMPRISING THE STABILIZER EXHIBITS EXCELLENT HEAT STABILITY, MARKEDLY IMPROVED RESISTANCE AGAINST THE AGING AT LOW TEMPERATURES, EXCELLENT ELECTRIC INSULATION, AND IS SUITED FOR USE AS A COVERING FOR ELECTRIC WIRES. FOR EXAMPLE, THE STABILIZER FOR CHLORINE-CONTAINING POLYMERS COMPRISES, AT A PARTICULAR WEIGHT RATIO, A COMPOSITE CONTAINING A FINE CRYSTALLINE CALCIUM SILICATE HAVING A CA/SI MOLAR RATIO OF NOT SMALLER THAN 0.5, AND A POLYHYDRIC ALCOHOL AT WEIGHT RATIO OF 20:80 TO 80:20, AND AN ISOCYANURATE COMPOUND AND/OR A HYDROTALCITE OR A SALT OF AN ALKALI-ALUMINUM COMPOSITE HYDROXIDE.