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A dispersive system for producing polyvinyl chloride which produces pale chlorine polyvinyl chloride
A dispersive system for producing polyvinyl chloride which produces pale chlorine polyvinyl chloride
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机译:用于生产聚氯乙烯的分散体系,该体系可生产浅氯聚氯乙烯
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摘要
Chlorinated polyvinyl chloride (CPVC) is prepared from polyvinyl chloride (PVC). When PVC is made utilizing polyvinyl alcohol, the low molecular weight CPVC compound so prepared is colored. A low molecular weight CPVC compound prepared from PVC that was made in the presence of a cellulose ether instead of polyvinyl alcohol resulted in a very low color compound having a DE of 0 by definition. However, a CPVC compound prepared from PVC made in the presence of polyvinyl alcohol resulted in a relatively high color (DE 18.51). During the polymerization of vinyl chloride, polyvinyl alcohol is replaced with the hydroxypropylmethyl cellulose ether having a methoxyl substitution of 15 - 35 percent and a hydroxypropoxyl substitution of from 4 - 35 percent.
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