| abstract |
PURPOSE: The titled flame-retardant yarn having specific transmittance, improved flame-retardance, gloss, transparency, etc., containing an acrylonitrile copolymer and an inorganic tin compound. n CONSTITUTION: The desired acrylic flame-retardant yarn consisting of acrylic synthetic yarn containing (A) a polymer comprising (i) acrylonitrile and (ii) a vinyl monomer copolymerizable with it (preferably polymer comprising 30W 70wt% component i and 70W30wt% halogen-containing vinyl monomer) and (B) 0.1W8wt% calculated as metal tin content of inorganic tin compound, having ≥50% transmittance when the synthetic yarn is dissolved in dimethylformamide in such a way that metal tin content is 0.03wt% and measured in 1cm solution at 650mμ wavelength. n COPYRIGHT: (C)1984,JPO&Japio |