Patent ID: 9006323
Filing Date: 2015-04-14
Classification: C08K,C08L,C09D,D01F

Abstract:
1. 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, wherein an in-water tensile strength per unit cross-sectional area of the flame-resistant polymer is 1.0 MPa or more and 6.5 MPa or less, a total additional amount of the acid is 0.05 part by weight to 5.0 parts by weight based on 10.0 parts by weight of the acrylonitrile polymer, and wherein the acid is a monocarboxylic acid selected from the group consisting of benzoic acid, hydroxybenzoic acid, methylbenzoic acid and aminobenzoic acid, a dicarboxylic acid selected from the group consisting of phthalic acid, isophthalic acid and terephthalic acid, or an aminosulfonic acid which is taurine or sulfanilic acid.