The stabilizing systems which can be used for resins based on vinyl halide against a thermal degradation, and compositions stabilized

摘要

A vinyl halide resin stabilizer composition which essentially contains:PPA. AN ANTIMONY ORGANIC SULFUR-CONTAINING COMPOUND, FOR EXAMPLE, ANTIMONY ALKYL MERCAPTIDES, ANTIMONY MERCAPTOACID ESTERS AND THE LIKE, ANDPPB. AN ORTHO-DIHYDRIC PHENOL, SUCH AS CATECHOL, T-BUTYL CATECHOL AND 2,3-DIHYDROXY NAPHTHALENE.P PThese compositions synergistically contribute to the heat stability of vinyl halide resin compositions and offer significant heat stabilization economies. Early color as well as long term heat stability performances of antimony organic compounds are improved in the compositions disclosed thereby permitting the reduction in amounts of such compounds needed for stabilization. Stabilizer compositions which are liquids and shelf-stable at ambient temperatures are also disclosed.