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Hydroxyl-terminated liquid polymers and process for preparation thereof using a mixture of at least one hydroxyl-containing disulfide and at least one hydroxyl-containing trisulfide
Hydroxyl-terminated liquid polymers and process for preparation thereof using a mixture of at least one hydroxyl-containing disulfide and at least one hydroxyl-containing trisulfide
Hydroxyl-terminated liquid polymers having an aliphatic polymeric backbone and sulfide linkages near the terminal portions of the polymer molecule are prepared by polymerizing (1) at least one vinylidene monomer having at least one terminal CH.sub.2 ═C group per monomer molecule, together with (2) a mixture of at least one hydroxyl- containing disulfide and at least one hydroxyl-containing trisulfide. Use of the above disulfide-trisulfide mixture permits viscosity control during polymerization with substantially less disulfide required than if the disulfide alone were used, and the resulting polymers have less odor and discolor less upon heating than if the disulfide alone were used.
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机译:通过使(1)至少一种具有至少一个末端CH 2 -boxH; C <每个单体的基团的亚乙烯基单体聚合来制备在聚合物分子的末端部分附近具有脂族聚合物主链和硫化物键的羟基封端的液体聚合物。分子与(2)至少一种含羟基的二硫化物和至少一种含羟基的三硫化物的混合物。与仅使用二硫化物相比,使用上述二硫化物-三硫化物混合物可以在聚合期间控制粘度,并且所需二硫化物的数量大大少于单独使用二硫化物,并且所得到的聚合物在加热时的气味和变色更少。
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