CHLORINATION OF POLY(VINYL CHLORIDE)IN LIQUID CHLORINE,AND CHLORINATED POLY(VINYL CHLORIDE)COMPOSITION
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机译:液体氯中氯的氯化反应及氯化聚氯乙烯的组成
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摘要
A process is disclosed for photochlorinating poly(vinyl chloride), ("PVC"), suspended in liquid chlorine ("Cl2") which swells the PVC and permits chlorination to occur in a gel phase. PVC starting material is in the form of solid free-flowing macrogranules which are slurried in from about 5 to about 50 times their weight of liquid Cl2 in a reaction zone maintained at a temperature in the range from about -50 DEG C. to about 50 DEG C., and a pressure sufficient to maintain the chlorine in its liquid state. Since liquid Cl2 itself swells the PVC to provide a gel phase in which photochlorination occurs, no conventional chlorinated hydrocarbon swelling agents, catalytic materials and the like are necessary. The process may be operated as a batch process, or a continuous process. Typical chlorine content of PVC is about 56.7 percent by weight (% by wt), and the product of chlorination is chlorinated poly(vinyl chloride), ("CPVC"). When formed, this CPVC is dissolved in the liquid Cl2 to form a thick syrup-like solution. CPVC is recovered as a solid by evaporation of the liquid Cl2, or as a finely divided solid by adding a halogenated lower alkane slowly to the CPVC syrup. The solid CPVC is homogeneously chlorinated, and its morphology and spectra, especially its 13C nmr spectra, differentiate it from prior art compositions.
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机译:公开了一种光氯化聚(氯乙烯)(“ PVC”)的方法,该方法悬浮在液氯(“ Cl2”)中,该液氯使PVC溶胀并允许在凝胶相中发生氯化。 PVC原料为固体自由流动的大颗粒形式,其在保持在约-50℃至约50℃的温度的反应区中以其液体Cl 2的重量的约5至约50倍的浆液化。以及足以使氯保持液态的压力。由于液体Cl2本身使PVC溶胀以提供发生光氯化的凝胶相,因此不需要常规的氯化烃溶胀剂,催化材料等。该过程可以作为间歇过程或连续过程进行。 PVC的典型氯含量为约56.7%重量(wt%),并且氯化产物为氯化聚(氯乙烯)(“ CPVC”)。形成时,该CPVC溶解在液体Cl2中,形成浓浆状溶液。通过蒸发液体Cl2将CPVC回收为固体,或通过将卤代低级烷烃缓慢添加到CPVC糖浆中而回收为细分的固体。固体CPVC被均匀氯化,其形态和光谱,尤其是其13 C nmr光谱,使其与现有技术组合物区分开。
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