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Advances in synthesis of catalyst for preparing DOA as PVC cold resistant plasticizer
Pages: 59-66
Year: Issue:  3
Journal: China Synthetic Resin and Plastics

Keyword:  n/iso-dioctyl adipatepolyvinyl chloridecatalystplasticizer;
Abstract: n/iso-dioctyl adipate(DOA)is an important low toxicity cold resistant plasticizer for polyvinyl chloride. The preparation of catalysts used for DOA are reviewed which include Bro..nsted acid catalyst,Lewis acid catalyst,titanic acid ester catalyst and lipase catalyst. Bro..nsted acid catalyst is composed of concentrated sulfuric acid,sodium bisulfate,heteropoly acid,p-toluene sulfonic acid,biomass char sulfonic acid,sulfonic acid resin and molecular sieve. Lewis acid catalysts contains ionic liquids,metal oxide,metal salt,solid super acid and so on. Inorganic liquid acid catalyst is of high causticity,which is hardly separated from the reaction system,while these problems can be resolved by immobilization of inorganic or organic acid catalyst and the catalyst can be used repeatedly. Titanic acid ester catalyst has been used industrially. Lipase catalyst features low reaction temperature and high selectivity,which bring it a bright future commercially. Besides,microwave can be applied to enhance the reaction rate in the process of DOA synthesis.
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