The present invention relates to a process for the treatment of lyocell fibers, comprising the step of contacting the fiber with at least one treatment medium, at least one treatment medium containing an amount of a crosslinking agent, wherein the cross-linking agent is capable of crosslinking cellulose under alkaline conditions and has a solubility in water at 20° C. of 20 g/l or less, and further comprising the step of treating the fiber with the cross-linking agent under alkaline conditions, characterized in that the cross-linking agent is added to the fiber in the form of a suspension or in solid form. The present invention also relates to lyocell fibers obtainable by the process of the present invention.

The present invention relates to a process for the treatment of lyocell fibers, comprising the step of contacting the fiber with at least one treatment medium, at least one treatment medium containing an amount of a crosslinking agent, wherein the cross-linking agent is capable of crosslinking cellulose under alkaline conditions and has a solubility in water at 20° C. of 20 g/l or less, and further comprising the step of treating the fiber with the cross-linking agent under alkaline conditions, characterized in that the cross-linking agent is added to the fiber in the form of a suspension or in solid form. The present invention also relates to lyocell fibers obtainable by the process of the present invention.

A compound of formula ##STR00001## wherein V, W, X and Y represent N or CH, at least one of V, W, X and Y being N and at least two of V, W, X and Y being CH; and R.sub.1, R.sub.2 and R.sub.3 are each independently of the other hydrogen, C.sub.1-C.sub.8alkyl, C.sub.1-C.sub.8alkoxy, nitro, cyano, trifluoromethyl, halogen or hydroxy; with the proviso that the compounds of formulae ##STR00002##
are excluded, provides good lightfastness properties to textile fibre materials, in particular PES fibre materials.

A compound of formula ##STR00001## wherein V, W, X and Y represent N or CH, at least one of V, W, X and Y being N and at least two of V, W, X and Y being CH; and R.sub.1, R.sub.2 and R.sub.3 are each independently of the other hydrogen, C.sub.1-C.sub.8alkyl, C.sub.1-C.sub.8alkoxy, nitro, cyano, trifluoromethyl, halogen or hydroxy; with the proviso that the compounds of formulae ##STR00002##
are excluded, provides good lightfastness properties to textile fibre materials, in particular PES fibre materials.

The invention relates to a method of making a flame retardant material, and/or to a flame retardant material, and/or a polymer composite including the flame retardant material, and/or a method of making the polymer composite. More particularly, the invention relates to treatment of a keratinous fibre with a reactive amine and an inorganic acid to make a flame retardant material which is can be used in a polymer composite.

The invention relates to a method of making a flame retardant material, and/or to a flame retardant material, and/or a polymer composite including the flame retardant material, and/or a method of making the polymer composite. More particularly, the invention relates to treatment of a keratinous fibre with a reactive amine and an inorganic acid to make a flame retardant material which is can be used in a polymer composite.

A compound of formula

##STR00001##

wherein V, W, X and Y represent N or CH, at least one of V, W, X and Y being N and at least two of V, W, X and Y being CH; R.sub.1, R.sub.2 and R.sub.3 are each independently of the other hydrogen, C.sub.1-C.sub.8 alkyl, C.sub.1-C.sub.8 alkoxy, nitro, cyano, trifluoromethyl, halogen or hydroxy; and the compound provides good lightfastness properties to textile fibre materials, in particular PES fibre materials.

A compound of formula

##STR00001##

wherein V, W, X and Y represent N or CH, at least one of V, W, X and Y being N and at least two of V, W, X and Y being CH; R.sub.1, R.sub.2 and R.sub.3 are each independently of the other hydrogen, C.sub.1-C.sub.8 alkyl, C.sub.1-C.sub.8 alkoxy, nitro, cyano, trifluoromethyl, halogen or hydroxy; and the compound provides good lightfastness properties to textile fibre materials, in particular PES fibre materials.

A fiber-treating agent including a condensate formed from the following components (A) and (B), and a component (C). A total content of a constituent element derived from the component (A) and a constituent element derived from the component (B) is more than 1 mass %, and a turbidity is 1,000 NTU or less: (A): formaldehyde or a hydrate thereof, (B): triazine or a derivative thereof of formula (1):

##STR00001## where R.sup.1 to R.sup.3 are the same or different, and each represent a hydrogen atom, a hydroxymethylamino group, an amino group, a hydroxy group, a halogen atom, a phenyl group, a linear or branched alkyl group or alkenyl group having 1 or more and 6 or less carbon atoms, or a linear or branched alkoxy group or alkenyloxy group having 1 or more and 6 or less carbon atoms, and (C): water.

A fiber-treating agent including a condensate formed from the following components (A) and (B), and a component (C). A total content of a constituent element derived from the component (A) and a constituent element derived from the component (B) is more than 1 mass %, and a turbidity is 1,000 NTU or less: (A): formaldehyde or a hydrate thereof, (B): triazine or a derivative thereof of formula (1):

##STR00001## where R.sup.1 to R.sup.3 are the same or different, and each represent a hydrogen atom, a hydroxymethylamino group, an amino group, a hydroxy group, a halogen atom, a phenyl group, a linear or branched alkyl group or alkenyl group having 1 or more and 6 or less carbon atoms, or a linear or branched alkoxy group or alkenyloxy group having 1 or more and 6 or less carbon atoms, and (C): water.