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AssigneeToray Industries, Inc.
InventorsMasafumi Sudo, Daisuke Kawakami, Tomihiro Ishida
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A dispersion contains a flame-resistant polymer, which can improve shaping stability of the flame-resistant polymer during ejection from a die orifice, and physical stability of a shaped product in a washing step. The dispersion containing a flame-resistant polymer is a dispersion in which a flame-resistant polymer is dispersed in an organic solvent, an in-water tensile strength thereof per unit cross-sectional area is 1.0 MPa or more and 6.5 MPa or less, the flame-resistant polymer can be preferably obtained by heat-treating an acrylonitrile polymer in the presence of at least one kind of acid, acid anhydride or acid chloride in an organic solvent, and a suitable organic solvent is a polar organic solvent.
A dispersion comprising 1) a flame-resistant polymer obtained by heat-treating an acrylonitrile polymer as a precursor polymer dispersed in 2) a polar organic solvent in the presence of at least an acid, an acid anhydride or an acid chloride and 3) an oxidizing agent,
Dependencies are inferred from the claim text.