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发明授权
CN101717526B 一种低熔点共晶PVC热稳定剂的制备方法 有权 转让

一种低熔点共晶PVC热稳定剂的制备方法
摘要：
本发明公开了一种低熔点共晶PVC热稳定剂的制备方法。该制备方法包括如下步骤：(1)将季戊四醇、双季戊四醇、二元羧酸在190～220℃加热熔融，混合均匀，然后依次加入催化剂、带水剂在180～200℃反应0.5～2小时；(2)将上述体系降温到160～180℃，加入硬脂酸锌、硬脂酸钙、受阻酚型抗氧剂，熔融并混合均匀后保持150～180℃加热0.5～2小时，然后冷却、粉碎、研磨得低熔点共晶PVC热稳定剂。该共晶熔点低于主要组分硬脂酸锌的熔点，对PVC热稳定作用好，且制备方法简单，易于工业化。
摘要（英）：

The invention discloses a method for preparing a low melting point eutectic PVC heat stabilizer, which comprises the following steps: heating the pentaerythritol, di-pentae and dicarboxylic acid at the temperature of between 190 and 220DEG C for melting, uniformly mixing the three, and orderly adding a catalyst and a water carrying agent at the temperature of between 180 and 200DEG C for reactionfor 0.5 and 2 hours; and (2) reducing the temperature of the system to the temperature of between 160 and 180DEG C, adding zinc stearate, calcium stearate and hindered phenolic antioxidant, smelting,uniformly mixing, maintaining the temperature of between 150 and 180DEG C for heating for 0.5 to 2 hours, and cooling, crushing and grinding to obtain the low melting point eutectic PVC heat stabilizer. The smelting point of the eutectic is lower than that of the main component zinc stearate, and the eutectic has good thermal stability effect on PVC; and the preparation method is simple and is easy to realize industrialization.

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