| 摘要 |
<p>1519711 Recovering chlorinated polymer from solution IMPERIAL CHEMICAL INDUSTRIES Ltd 17 Dec 1976 [30 Jan 1976] 3790/76 Heading C3L A chlorinated polymer of low residual solvent content is obtained by (a) chlorinating a polymer in a solvent and (b) contacting the solution formed with steam or hot water to isolate the polymer, this step being carried out in the presence of a polymer lubricant compatible with the chlorinated polymer product in the proportions employed. The lubricants are fatty acids (C8 upwards), their esters or amides, or higher alcohols, e.g. ethyl palmitate, lauryl alcohol, tridecanol and propylene glycol monoricinoleate. Typical starting polymers are polyisoprene, natural rubber, polyethylene, polyvinyl chloride and diene polymers containing aromatic groups.</p> |
