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Production of acrylonitrile copolymer

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专利汇可以提供Production of acrylonitrile copolymer专利检索,专利查询,专利分析的服务。并且PURPOSE: A specifically composed monomer mixture consisting of acrylonitrile, vinylidene chlorine and so on is subjected to continuous suspension polymerization in an aqueous medium under special conditions to enable industrially advantageous polymerization of the titled polymer which gives flame-retardant acrylic fibers with high resistance to clarity loss.
CONSTITUTION: A monomer mixture consisting of (A) acrylonitrile, (B) vinylidene chloride and (C) a vinyl monomer bearing sulfonic group such as allylsufonic acid is polymerized in an aqueous medium using a bisulfite sat as a reducing agent for a water-soluble redox initiator so that the equivalent ratio of the reducing agent to the oxidizing agent becomes 1W4 to give the objective polymer containing 40W75wt% of component A, 30W58wt% of component B and 0.5W1.5wt% of component C. In order to improve the polymerization utility of component B, the use of an anionic surfactant is recommended in an amount of 0.8W2wt% based on the total monomers.
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