Process for manufacturing modacrylic fibers having high luster, thermal stability and flame resistance
AssigneeSnia Viscosa Societa' Nazionale Industria Applicazioni Viscosa S.p.A.
InventorsGiorgio Cazzaro, Antonino Cavallaro, Antonio Salan, Giancarlo Matera
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Abstract
A method for preparing flame-resisting modacrylic fibers containing pentaent antimony oxide is described wherein the antimony oxide is suspended in a mixture of water and an organic solvent selected from dimethylformamide and dimethylacetamide and the suspension is then mixed with the viscose solution of the modacrylic polymeric material to be spun. The process yield high luster, flame-resisting modacrylic fibre of the "L.O.I. uprated" type.
Claims6
A method of preparing flame-resisting modacrylic fibers containing pentavalent antimony oxide, characterized in that the antimony oxide is suspended in a mixture of water and an organic solvent selected from dimethylformamide and dimethylacetamide wherein the percent by weight of water in the suspension ranges from 20% to 40%, and that the suspension is then mixed with the viscose solution of modacrylic polymeric material to be spun.
Dependencies are inferred from the claim text.