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Production of acrylic yarn precursor

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专利汇可以提供Production of acrylic yarn precursor专利检索,专利查询,专利分析的服务。并且PURPOSE: To obtain the titled precursor having high strength free from yarn defect, by feeding raw materials such as a monomer, e.g., acrylonitrile, etc., a catalyst, a solvent, etc. subjected to fine filtration, containing substantially no impurity, to a polymerization system, and spinning it.
CONSTITUTION: (A) A polymerizable unsaturated monomer containing preferably ≥95wt% acrylonitrile, (B) a polymerization initiator [e.g., redox initiator such as (NH
4 )
2 S
2 O
3 /NH
4 HSO
3 , etc.], (C) an aqueous solution of other auxiliaries, and (D) a solvent (e.g., DMF, etc.) for preparing a stock solution are subjected to fine filtration treatment using a filtering medium such as fluoro pore made of polytetrafluoroethylene having ≤0.1μ open pore diameter. The prepared raw materials containing substantially no impurity are fed to a polymerization system, polymerized, the formed polymer is spun, to give the aimed precursor. Preferably 0.5W3wt% carboxyl group-containing unsaturated monomer (e.g., acrylic acid, etc.) as an agent for flameproofing rate promoting effect is added to the raw material A.
COPYRIGHT: (C)1986,JPO&Japio,下面是Production of acrylic yarn precursor专利的具体信息内容。

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