Highly flame-retardant cross-linked acrylic fiber and highly flame-retardant composite
View Patent ↗The highly flame-retardant acrylic fiber of the invention comprises 1 to 20 weight % of a glycidyl methacrylate polymer and 1 to 20 weight % of antimony oxide in an acrylonitrile copolymer obtained with use of monomers containing 20 to 70 weight % of at least one halogen-containing monomer, and can be cross-linked by heating. The cross-linked fiber and a highly flame-retardant composite produced with it are rarely ignited and difficult to be perforated with flame.
1. A highly flame-retardant cross-linked acrylic fiber, comprising: a composition of 1 to 20 weight % of a glycidyl methacrylate polymer and 1 to 20 weight % of antimony oxide in an acrylonitrile copolymer produced by using monomers containing 20 to 70 weight % of at least one halogen-containing monomer, said glycidyl methacrylate polymer being a copolymer of glycidyl methacrylate and methyl methacrylate.
2. The highly flame-retardant cross-linked acrylic fiber according to claim 1 , in which said glycidyl methacrylate polymer is a copolymer produced by using at least 50 weight % of glycidyl methacrylate.
3. The highly flame-retardant cross-linked acrylic fiber according to claim 1 , in which said halogen-containing monomer is vinylidene chloride.
4. The highly flame-retardant cross-linked acrylic fiber according to claim 1 , in which at least 50 weight % of said flame-retardant cross-linked acrylic fiber is insoluble in dimethylformamide after heating at 150° C.