Kanebo Co., Ltd.

Kanebo, Limited

Nicca Chemical Co., Ltd.

Junji Sano

Toshikazu Fuse

Atsushi Yamamoto

Hajime Saito

Kunio Ichihashi

Hirotomo Banko

Flame retardant compounds including at least one of a group of specified phosphoryl compounds which have a phenylene group in the molecule are applied to fiber materials composed of polyester-based synthetic fibers. Sufficiently long-lasting flame retardancy may be imparted to polyester-based synthetic fiber materials without the use of halogen compounds.

Flame retardants and flame retardant finishing method for

A method for preparing silk fibers crosslinked with an epoxy compound is disclosed. Silk fibers are soaked in an aqueous processing liquid containing a water-soluble epoxy compound and a catalyst wherein the solubility of the silk fiber is at most 30% by weight when the silk fiber is soaked in an aqueous 5 wt % sodium hydroxide solution at a temperature of 65.degree. C. for 60 minutes, and dyeing depth, K/S, at 520 nm with 9% owf of a red reactive dye, Color Index Reactive Red 63 at the temperature of 60.degree. C. for 60 minutes is at most 7.

Silk fiber having good abrasion resistance and good light resistance and

The present invention provides silk fiber crosslinked with an epoxy compound, characterized in that solubility of the silk fiber is 30% by weight or less when the silk fiber is soaked in an aqueous 5 wt. % sodium hydroxide solution at a temperature of 65.degree. C. for 60 minutes, and dyeing depth, K/S, at 520 nm with 9% owf. of a red reactive dye, color Index Reactive Red 63 at the temperature of 60.degree. C. for 60 minutes is 7 or less. The silk fiber has improved properties including long term resistance to light deterioration and resistance to fibrillation.

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Amagasaki, Japan

Junji Sano