| 摘要 |
In a process for stabilizing mixtures of halogenated polymers, at least one organic compound containing one or more -SH functions and a very small amount of at least one halide chosen from the organometallic halides and/or the metallic halides, or a mixture of these compounds, are added to the mixtures during their preparation. The organic compounds containing one or more -SH functions have the formula R(R'-SHx)y in which: R is the residue of a monohydroxylic alcohol or of a monomeric or polymeric polyol, R'-SHx is the residue of a carboxylic monoacid or polyacid containing one or more -SH functions bonded to R by esterification. The organometallic halides have the formula RnMe(v)Halv-n in which R is an organic residue, n is the number of R bonded to the metal Me, Me = Sn, Al, B, Sb, Fe, v is the valency of Me. The metallic halides have the formula Me(v)Halv in which: Me is a metal whose halide solution containing 35 meq of halide per litre of distilled water has a pH equal ot or less than 5, and preferably equal to or less than 3, at 23 DEG C. |
