JP2019019178A - Flame-retardant composition - Google Patents

Abstract

To provide a flame retardant composition having good storage stability without causing separation and precipitation with time when a flame retardant is dispersed in water and capable of exhibiting high flame retardancy when impregnated in a fiber material.SOLUTION: There is provided a flame retardant composition which comprises: at least one flame retardant selected from the group consisting of a melamine salt, a piperazine salt and a specific phosphorus compound, a component (B): at least one natural polysaccharide selected from the group consisting of welan gum, xanthan gum and diutan gum; and a component (C): water.SELECTED DRAWING: None

Description

  The present invention relates to a flame retardant composition, and more specifically, a flame retardant composition in which a melamine salt, piperazine salt, or a specific phosphorus compound, which is a flame retardant, is dispersed in water by adding a natural polysaccharide. And a method for producing flame retardant fibers using a treatment liquid comprising the composition or a diluted treatment liquid thereof.

  Flame retardants are chemicals that are added to flammable materials to prevent them from burning or spreading. Building materials, curtains, carpets, various parts of vehicles (sheet fabrics, etc.), rubber, plastic It is used everywhere, such as paper and packaging materials. Among them, the technology to impart a flame-retardant effect to fibers has a wide range of uses, mainly in theaters, hotels, high-rise buildings, etc., which are defined by flame-proof regulations, and textile products in places where an unspecified number of people gather ( Curtains, carpets, carpets, etc.), bedding, baby clothes, clothing for the elderly and fabrics for vehicle seats. Therefore, the need for flame retardants for textiles is very high and has been studied by many companies and institutions so far.

  As the types of flame retardants, bromine flame retardants, antimony compounds, metal hydroxides, metal oxides, intomesent flame retardants, condensed phosphate ester flame retardants, and the like are generally known. Among them, intomescent flame retardants are difficult to suppress the combustion of materials by forming a surface expansion layer (Intumescent) that prevents radiant heat from the combustion source and diffusion of combustion gases and smoke from the combustion products to the outside. It is a flame retardant and does not have any substances that may cause environmental impact, such as brominated flame retardants and antimony compounds, and is widely used mainly as a flame retardant for plastics. For example, Patent Document 1 discloses that 20 to 50 parts by mass of (A) component: one or more melamine salts selected from the group of melamine orthophosphate, melamine pyrophosphate, and melamine polyphosphate; (B) component: piperazine orthophosphate 50 to 80 parts by mass of piperazine selected from the group consisting of piperazine pyrophosphate and piperazine polyphosphate; component (C): flame retardant containing 0.01 to 20.0 parts by mass of a specific bicyclophosphate compound A composition is disclosed.

  As a technique for making a fiber material flame-retardant, there is a method in which a solution in which a flame retardant is dissolved in a solvent is applied to the fiber, the solution is impregnated in the fiber, and the flame retardant is adsorbed on the fiber. In consideration of recent environmental problems, a method is known in which water is used in place of a solvent and a solution obtained by dissolving or dispersing a flame retardant in water is applied to fibers. For example, Patent Document 2 discloses at least one nitrogen-based flame retardant (II) selected from the group consisting of at least one organophosphorus flame retardant (I) and a guanidine compound, a guanylurea compound, and a melamine compound. A flame retardant processing agent for polyester fibers which is an aqueous dispersion or an aqueous emulsion containing one kind is disclosed.

  Further, various types of phosphorus compounds are known as flame retardants other than intomesents. For example, in Patent Document 3, a phosphorus compound containing a heterocycle composed of phosphorus atoms and oxygen atoms is used as a fiber material. A flame retardant processing agent for flame retarding is proposed.

JP 2016-125035 A JP 2007-182652 A JP 2002-275473 A

  However, with the recent tightening of safety regulations for buildings and vehicles, high flame retardancy is also required for materials used therefor, and phosphate ester flame retardants described in Patent Document 2 are used in water. Although the flame retardant fiber using the flame retardant composition dispersed in the material exhibits some flame retardancy, it has a problem in flame retardant performance until it can meet market needs. In addition, in order to disperse and emulsify the highly flame retardant in flame retardant described in Patent Document 1, in order to disperse and emulsify in water, when a generally known surfactant or the like is used, it is separated over time. There was a problem such as. Moreover, in the flame retardant processing agent of patent document 3, the stability of the phosphorus compound in a flame retardant processing agent was bad, and there existed a problem that it settled with time.

  Therefore, the problem to be solved by the present invention is that, when the flame retardant is dispersed in water, it does not separate and settle with time, has good storage stability, and further has high flame resistance when impregnated into a fiber material. It is providing the flame retardant composition which can express property.

（式中、ｎは１又は２を表し、Ｒ^１は、ｎが１の場合は、水素原子、炭素原子数１〜２０の、無置換若しくは水酸基、ハロゲン原子、シアノ基、カルボキシル基で置換された炭化水素基を表し、ｎが２の場合は、炭素原子数１〜２０の、無置換若しくは水酸基、ハロゲン原子、シアノ基、カルボキシル基で置換された２価の炭化水素基を表す。）
（Ａ−４）：下記一般式（２）で表されるジアルキルホスフィン酸及びその塩からなる群より選ばれる少なくとも１種の化合物

（式中、Ｒ^２、Ｒ^３はそれぞれ独立して炭素原子数１〜６のアルキル基を表し、Ｍは、Ｍｇ、Ｃａ、Ａｌ、Ｓｂ、Ｓｎ、Ｇｅ、Ｔｉ、Ｆｅ、Ｚｒ、Ｚｎ、Ｃｅ、Ｂｉ、Ｓｒ、Ｍｎ、Ｌｉ、Ｎａ、Ｋ、Ｈ、又はプロトン化窒素塩基を表し、ｍは１〜４の整数を表す。） Therefore, as a result of intensive studies, the present inventors have found that melamine salt, piperazine salt or specific phosphorus compound is dispersed in water using welan gum, xanthan gum or diyutan gum, so that storage stability and flame retardancy can be obtained. The inventors have found that a good flame retardant composition can be obtained, and have completed the present invention.
That is, the present invention comprises: (A) component: at least one flame retardant selected from the group consisting of the following (A-1) to (A-4); It is a flame retardant composition characterized by containing at least one natural polysaccharide selected from the group consisting of: (C) component: water:
(A-1): at least one melamine salt selected from the group consisting of melamine orthophosphate, melamine pyrophosphate and melamine polyphosphate;
(A-2): at least one piperazine salt selected from the group consisting of piperazine orthophosphate, piperazine pyrophosphate and piperazine polyphosphate;
(A-3): Phosphorus compound represented by the following general formula (1)

(In the formula, n represents 1 or 2, and when n is 1, R ¹ is a hydrogen atom, an unsubstituted or substituted hydroxyl group having 1 to 20 carbon atoms, a halogen atom, a cyano group, or a carboxyl group. When n is 2, it represents an unsubstituted or divalent hydrocarbon group substituted with a hydroxyl group, a halogen atom, a cyano group, or a carboxyl group.
(A-4): at least one compound selected from the group consisting of dialkylphosphinic acids represented by the following general formula (2) and salts thereof

(In the formula, R ² and R ³ each independently represent an alkyl group having 1 to 6 carbon atoms, and M represents Mg, Ca, Al, Sb, Sn, Ge, Ti, Fe, Zr, Zn, Ce. , Bi, Sr, Mn, Li, Na, K, H, or protonated nitrogen base, m represents an integer of 1 to 4)

  The effect of the present invention is that by adding a natural polysaccharide such as welan gum, xanthan gum or diyutan gum, it becomes easy to disperse a large amount of the flame retardant in water, and the flame retardant composition comprising the resulting aqueous dispersion The product has good storage stability, and a highly flame-retardant fiber can be obtained by impregnating the fiber material with a treatment liquid composed of the flame-retardant composition or a diluted treatment liquid thereof and adsorbing the fiber material. There is something you can do.

  The flame retardant composition of the present invention comprises a flame retardant as component (A), (B) at least one natural polysaccharide selected from the group consisting of welan gum, xanthan gum and dieutan gum, and component (C). It is characterized by containing the water which is. Here, the component (A) is for imparting flame retardancy to the material in which the flame retardant composition is used, and the natural polysaccharide as the component (B) It is an indispensable component to disperse in water more efficiently and more efficiently.

（式中、ｎは、１又は２を表し、Ｒ^１は、ｎが１の場合は、水素原子、炭素原子数１〜２０の、無置換若しくは水酸基、ハロゲン原子、シアノ基、カルボキシル基で置換された炭化水素基を表し、ｎが２の場合は、炭素原子数１〜２０の、無置換若しくは水酸基、ハロゲン原子、シアノ基、カルボキシル基で置換された２価の炭化水素基を表す。）
（Ａ−４）：下記一般式（２）で表されるジアルキルホスフィン酸及びその塩からなる群より選ばれる少なくとも１種の化合物

（式中、Ｒ^２、Ｒ^３は、それぞれ独立して炭素原子数１〜６のアルキル基を表し、Ｍは、Ｍｇ、Ｃａ、Ａｌ、Ｓｂ、Ｓｎ、Ｇｅ、Ｔｉ、Ｆｅ、Ｚｒ、Ｚｎ、Ｃｅ、Ｂｉ、Ｓｒ、Ｍｎ、Ｌｉ、Ｎａ、Ｋ、Ｈ、又はプロトン化窒素塩基を表し、ｍは、１〜４の整数を表す。） In the flame retardant composition of the present invention, the flame retardant as the component (A) is at least one compound selected from the group consisting of the following components (A-1) to (A-4):
(A-1): at least one melamine salt selected from the group consisting of melamine orthophosphate, melamine pyrophosphate and melamine polyphosphate;
(A-2): at least one piperazine salt selected from the group consisting of piperazine orthophosphate, piperazine pyrophosphate and piperazine polyphosphate;
(A-3): Phosphorus compound represented by the following general formula (1)

(In the formula, n represents 1 or 2, and when n is 1, R ¹ is unsubstituted or substituted with a hydrogen atom, a hydroxyl group, a halogen atom, a cyano group, or a carboxyl group having 1 to 20 carbon atoms. When n is 2, it represents an unsubstituted or divalent hydrocarbon group substituted with a hydroxyl group, a halogen atom, a cyano group, or a carboxyl group.
(A-4): at least one compound selected from the group consisting of dialkylphosphinic acids represented by the following general formula (2) and salts thereof

(Wherein R ² and R ³ each independently represents an alkyl group having 1 to 6 carbon atoms, and M represents Mg, Ca, Al, Sb, Sn, Ge, Ti, Fe, Zr, Zn, Ce, Bi, Sr, Mn, Li, Na, K, H, or a protonated nitrogen base is represented, and m represents an integer of 1 to 4.)

  The melamine salt as the component (A-1) is selected from the group consisting of melamine orthophosphate, melamine pyrophosphate and melamine polyphosphate, which may be used alone or in combination of two or more. Good. Among these, melamine pyrophosphate is preferable from the viewpoint of flame retardancy, handling properties, and storage stability. In addition, when using 2 or more types of (A-1) component together, it is so preferable that the usage-amount of melamine pyrophosphate is high.

  The method for producing the component (A-1) is not particularly limited. For example, orthophosphoric acid, pyrophosphoric acid, polyphosphoric acid (hereinafter, these three compounds are collectively referred to as phosphoric acids), or salts of phosphoric acids. (For example, sodium dihydrogen phosphate) and melamine are dissolved in water or a hydrophilic solvent such as methanol or acetone as necessary, for example, at 0.1 to 12 at 20 to 150 ° C. It can manufacture by making it react over time. At this time, the amount of melamine used is preferably 0.5 to 4 mol, more preferably 1 to 3 mol, and still more preferably 1.2 to 2.5 mol with respect to 1 mol of phosphoric acids.

  The melamine pyrophosphate and melamine polyphosphate can be obtained by reacting pyrophosphate or polyphosphoric acid (and their salts) with melamine by the above-described method, but the melamine orthophosphate obtained by the above-described method. Can also be obtained by heat condensation by a known method described in Japanese Patent No. 5791251, WO2014 / 033946.

  In addition, the melamine salt obtained by the said method usually precipitates as a crystal | crystallization. Therefore, it can be easily separated from the solvent by conventional separation means such as filtration and centrifugation, and further washed with water to increase the purity of the melamine salt.

  Next, the piperazine salt as the component (A-2) is selected from the group consisting of piperazine orthophosphate, piperazine pyrophosphate and piperazine polyphosphate, which may be used alone or in combination of two or more. May be. Among these, piperazine pyrophosphate is preferable in terms of flame retardancy, handling properties, and storage stability. In addition, when using 2 or more types of (A-2) component together, it is so preferable that the usage-amount of piperazine pyrophosphate is high.

  (A-2) The manufacturing method of a component is not restrict | limited in particular, For example, piperazine hydrochloride, phosphoric acid, or a phosphate in aqueous solution, for example at 20-150 degreeC, 0 It can be produced by reacting for 1 to 12 hours. At this time, the amount of piperazine hydrochloride used is preferably 0.5 to 4 mol, more preferably 1 to 3 mol, and still more preferably 1.2 to 2.5 mol with respect to 1 mol of phosphoric acid.

  The piperazine pyrophosphate can be obtained by reacting pyrophosphate with piperazine by the above-described method, but the piperazine diphosphate disclosed in Japanese Patent No. 575512 can also be obtained by heat condensation. it can.

  The piperazine salt obtained by the above method usually precipitates as crystals. Therefore, for example, it can be easily separated from the solvent by conventional separation means such as filtration or centrifugation, and further washed with water or the like to increase the purity of the piperazine salt.

  In the flame retardant composition of the present invention, the components (A-1) and (A-2) are coated / impregnated with a flame retardant composition on fiber materials such as chemical fibers, synthetic fibers, and plant fibers. Therefore, it is a component for imparting flame retardancy to the fiber material. The component (A-1) and the component (A-2) are combined with each other, so that when the fiber material burns, the surface expansion layer (Intumescent) blocks the diffusion and heat transfer of decomposition products generated from the material. Is a component having flame retardancy not found in halogen compounds and inorganic compounds.

(A-3) In the phosphorus compound represented by the above general formula (1) of the component, n is 1 or 2, and R ¹ is a hydrogen atom or a carbon atom number of 1 to 20 when n is 1. Represents a hydrocarbon group substituted with an unsubstituted or hydroxyl group, a halogen atom, a cyano group, or a carboxyl group, and when n is 2, an unsubstituted or hydroxyl group, a halogen atom, a cyano group having 1 to 20 carbon atoms, Represents a divalent hydrocarbon group substituted with a carboxyl group.

  Examples of the hydrocarbon group having 1 to 20 carbon atoms when n is 1 include, for example, methyl, ethyl, propyl, iso-propyl, butyl, sec-butyl, tert-butyl, iso-butyl, amyl, iso-amyl , Tert-amyl, pentyl, hexyl, heptyl, isoheptyl, t-heptyl, n-octyl, isooctyl, t-octyl, 2-ethylhexyl, n-nonyl, n-decyl and other alkyl groups; vinyl, allyl, butenyl, propenyl An alkenyl group such as phenyl, naphthyl, anthracen-1-yl, phenanthren-1-yl, o-tolyl, m-tolyl, p-tolyl, 4-vinylphenyl, 3-isopropylphenyl, 4-isopropylphenyl, 4- Butylphenyl, 4-isobutylphenyl, 4-t-butylphenyl 4-hexylphenyl, 4-cyclohexylphenyl, 4-octylphenyl, 4- (2-ethylhexyl) phenyl, 2,3-dimethylphenyl, 2,4-dimethylphenyl, 2,5-dimethylphenyl, 2,6-dimethyl Phenyl, 3,4-dimethylphenyl, 3,5-dimethylphenyl, 2,4-di-t-butylphenyl, 2,5-di-t-butylphenyl, 2,6-di-t-butylphenyl, 2 , 4-di-t-pentylphenyl, 2,5-di-t-amylphenyl, cyclohexylphenyl, biphenyl, 2,4,5-trimethylphenyl and other aryl groups; benzyl, phenethyl, 2-phenylpropyl, diphenylmethyl , Arylalkyl groups such as triphenylmethyl, styryl, cinnamyl and the like.

  Examples of the hydrocarbon group having 1 to 20 carbon atoms when n is 2 include methylene, ethylene, propylene, methylethylene, butylene, 1-methylpropylene, 2-methylpropylene, 1,2-dimethylpropylene, 1,3 -Dimethylpropylene, 1-methylbutylene, 2-methylbutylene, 3-methylbutylene, 4-methylbutylene, 2,4-dimethylbutylene, 1,3-dimethylbutylene, pentylene, hexylene, heptylene, octylene, ethane-1 Alkylene groups such as 1,2-diyl and propane-2,2-diyl; cycloalkylene groups such as 1,2-cyclopropylene group, 1,3-cycloheptylene group and trans-1,4-cyclohexylene; phenylene, tolylene, Arylene groups such as naphthylene; phenylenemethylene, phenyleneethylene What arylenealkylene group; phenylenedimethylene, such arylene alkylene groups such as phenylene ethylene group.

In addition, the methylene chain in the alkylene group having 1 to 20 carbon atoms, the arylene alkylene group, and the arylene alkylene group may be replaced with —O—, —S—, —CO—, or —C═C—. Good.

Among the phosphorus compounds represented by the general formula (1), a phosphorus compound represented by the following formula is preferable from the viewpoint of easy availability.

Moreover, in the dialkylphosphinic acid represented by the above general formula (2) of the component (A-4) or a salt thereof, R ² and R ³ are alkyl groups having 1 to 6 carbon atoms, such as Examples of the alkyl group include methyl, ethyl, propyl, isopropyl, butyl, secondary butyl, tertiary butyl, isobutyl, amyl, isoamyl, secondary amyl, tertiary amyl, hexyl and the like. Among these alkyl groups, methyl, ethyl and propyl are preferable, and ethyl is more preferable in that it can be used industrially.

  In the dialkylphosphinic acid or salt thereof as the component (A-4), M is preferably Al, Ca, Ti, Zn, Sn, or Zr from the viewpoint that it can be obtained at low cost and has a high flame retardant effect. Al is particularly preferred.

  In the flame retardant of the said (A) component, it is preferable to use together the (A-1) component and the (A-2) component from a viewpoint of the adsorptivity to a fiber material and a flame retardance. In this case, the ratio of the component (A-1) to the component (A-2) is usually (A-1) when the total amount of the component (A-1) and the component (A-2) is 100 parts by mass. ) Component / (A-2) component is preferably 20/80 to 50/50, more preferably 25/75 to 50/50, and even more preferably 30/70 to 50/50. . When the component (A-1) is less than 20 parts by mass or more than 50 parts by mass, the surface expansion layer cannot be formed well, and the flame retardancy tends to decrease, which is not preferable. .

The flame retardant of the component (A) prevents the flame retardant powder from agglomerating and, from the viewpoint of improving the dispersibility in water, before preparing the flame retardant composition of the present invention, silicone oil, silane coupling It can also be pretreated with an agent or the like.
Examples of silicone oils that can be used to treat the flame retardant of component (A) include polysiloxane side chains, dimethyl silicone oils whose terminals are all methyl groups, polysiloxane side chains, and terminals that are methyl groups. Yes, methyl phenyl silicone oil in which a part of the side chain is a phenyl group, a side chain of polysiloxane, a methyl hydrogen silicone oil in which a terminal is a methyl group and a part of the side chain is hydrogen, etc. In addition, an amine-modified, epoxy-modified, cycloaliphatic epoxy-modified, carboxyl-modified, carbinol-modified, mercapto-modified, polyether-modified, in which an organic group is introduced into a part of these side chains and / or terminals , Long chain alkyl modification, fluoroalkyl modification, higher fatty acid ester modification, higher fatty acid amide modification, silanol modification , Diol-modified, it may be used phenol-modified and / or aralkyl-modified, the modified silicone oil.

  Specific examples of the silicone oil include KF-96 (manufactured by Shin-Etsu Chemical Co., Ltd.), KF-965 (manufactured by Shin-Etsu Chemical Co., Ltd.), KF-968 (manufactured by Shin-Etsu Chemical Co., Ltd.) as dimethyl silicone oil. Examples of methyl hydrogen silicone oil silicone oils include KF-99 [manufactured by Shin-Etsu Chemical Co., Ltd.], KF-9901 [Shin-Etsu Chemical Co., Ltd.], HMS-151 (manufactured by Gelest), HMS-071 ( Gelest), HMS-301 (Gelest), DMS-H21 (Gelest), and the like. Examples of methylphenyl silicone oil include KF-50 [manufactured by Shin-Etsu Chemical Co., Ltd.], KF- 53 [Shin-Etsu Chemical Co., Ltd.], KF-54 [Shin-Etsu Chemical Co., Ltd.], KF-56 [Shin-Etsu Chemical Co., Ltd.], etc. For example, X-22-343 [manufactured by Shin-Etsu Chemical Co., Ltd.], X-22-2000 [manufactured by Shin-Etsu Chemical Co., Ltd.], KF-101 [manufactured by Shin-Etsu Chemical Co., Ltd.], KF-102 [Shin-Etsu Chemical] Chemical Co., Ltd.], KF-1001 [Shin-Etsu Chemical Co., Ltd.], carboxyl modified product, for example, X-22-3701E [Shin-Etsu Chemical Co., Ltd.], carbinol modified product, for example, Examples of X-22-4039 [manufactured by Shin-Etsu Chemical Co., Ltd.], X-22-4015 [manufactured by Shin-Etsu Chemical Co., Ltd.], and amine-modified products include KF-393 [manufactured by Shin-Etsu Chemical Co., Ltd.]. It is done. Among the silicone oils, methyl hydrogen silicone oil is preferable from the viewpoint of preventing aggregation of the flame retardant powder and improving the dispersibility in water.

  When the flame retardant of the component (A) is treated with silicone oil, the amount of silicone oil used is that of the storage stability of the flame retardant of the component (A) and the dispersibility improvement in water. 0.01-5.0 mass parts is preferable with respect to 100 mass parts of flame retardants, 0.05-3.0 mass parts is more preferable, and 0.1-2.0 mass parts is still more preferable.

  Examples of the silane coupling agent that can be used for the treatment of the flame retardant of the component (A) include, for example, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltriacetoxysilane as silane coupling agents having an alkenyl group. Vinyltris (2-methoxyethoxy) silane, vinylmethyldimethoxysilane, octenyltrimethoxysilane, allyltrimethoxysilane, p-styryltrimethoxysilane, and the like. As the silane coupling agent having an acrylic group, Examples of the silane coupling agent having a methacryl group include 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, and 3-acryloxypropyltriethoxysilane. Toxisilane, 3-methacryloxypropylmethyldiethoxysilane, 3-methacryloxypropyltriethoxysilane, methacryloxyoctyltrimethoxysilane and the like can be mentioned. As the silane coupling agent having an epoxy group, 2- (3,4-epoxy (Cyclohexyl) ethyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropyltriethoxysilane, glycid Examples of the silane coupling agent having an amino group include N-2- (aminoethyl) -3-aminopropylmethyldimethoxysilane and N-2- (aminoethyl) -3-aminopropylene. Trimethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-triethoxysilyl-N- (1,3-dimethyl-butylidene) propylamine, N-phenyl-3-aminopropyltrimethoxy Silane, N, N′-bis [3- (trimethoxysilyl) propyl] ethylenediamine, N- (vinylbenzyl) -2-aminoethyl-3-aminopropyltrimethoxysilane hydrochloride and the like, and isocyanurate group Tris- (trimethoxysilylpropyl) isocyanurate can be mentioned as the silane coupling agent having, and 3-mercaptopropylmethyldimethoxysilane, 3-mercaptopropyltrimethoxysilane, 3- Mercaptopro Examples of the silane coupling agent having a ureido group include 3-ureidopropyltrimethoxysilane and 3-ureidopropyltriethoxysilane. Examples of the silane coupling agent having a sulfide group include bis ( Triethoxysilylpropyl) tetrasulfide, and silane coupling agents having a thioester group include 3-octanoylthio-1-propyltriethoxysilane, and silane coupling agents having an isocyanate group include 3-isocyanatopropyltri Examples include ethoxysilane and 3-isocyanatopropyltrimethoxysilane.

  Among these silane coupling agents, a silane coupling agent having an epoxy group is preferable from the viewpoints of preventing aggregation of the flame retardant powder, improving storage stability, water resistance, and heat resistance.

  Commercially available products can be used as the silane coupling agent. For example, as vinyltrimethoxysilane, KBE-1003 manufactured by Shin-Etsu Chemical Co., Ltd., manufactured by Momentive Performance Materials Japan LLC. A-171, Z-6300 manufactured by Toray Dow Corning Co., Ltd., GENIOSIL XL10 manufactured by Asahi Kasei Wacker Silicone Co., Ltd., Silaace S210 manufactured by Nimi Shoji Co., Ltd., etc. KBE-1003 manufactured by Chemical Industry Co., Ltd., A-151 manufactured by Momentive Performance Materials Japan G.K., Z-6519 manufactured by Toray Dow Corning Co., Ltd., GENIOSIL GF56 manufactured by Asahi Kasei Wacker Silicone Co., Ltd. , Silami Ace S22 manufactured by Nimi Corporation As a vinyl triacetoxy silane, GENIOSIL GF62 manufactured by Asahi Kasei Wacker Silicone Co., Ltd. can be cited. As a vinyl tris (2-methoxyethoxy) silane, manufactured by Momentive Performance Materials Japan GK A-172 is exemplified, and examples of vinylmethyldimethoxysilane include A-2171 manufactured by Momentive Performance Materials Japan GK, GENIOSIL XL12 manufactured by Asahi Kasei Wacker Silicone Co., Ltd., and octenyltrimethoxysilane. As such, KBE-1083 manufactured by Shin-Etsu Chemical Co., Ltd. can be mentioned. As allyltrimethoxysilane, Z-6825 manufactured by Toray Dow Corning Co., Ltd. can be mentioned. As p-styryltrimethoxysilane, Examples include KBM-1403 manufactured by Shin-Etsu Chemical Co., Ltd., and 3-acryloxypropyltrimethoxysilane includes KBM-5103, and 3-methacryloxypropylmethyldimethoxysilane includes Shin-Etsu Chemical Co., Ltd. KBM-502 manufactured by Toray Dow Corning Co., Ltd., and Z-6033 manufactured by Toray Dow Corning Co., Ltd. are listed. As 3-methacryloxypropyltrimethoxysilane, KBM-503 manufactured by Shin-Etsu Chemical Co., Ltd., Momentive Performance A-174 manufactured by Materials Japan G.K., Z-6030 manufactured by Toray Dow Corning Co., Ltd., GENIOSIL GF31 manufactured by Asahi Kasei Wacker Silicone Co., Ltd., Sila Ace S710 manufactured by Himi Shoji Co., Ltd. As 3-methacryloxypropylmethyldiethoxysilane KBE-502 manufactured by Shin-Etsu Chemical Co., Ltd. can be mentioned. As 3-methacryloxypropyltriethoxysilane, KBE-503 manufactured by Shin-Etsu Chemical Co., Ltd., manufactured by Momentive Performance Materials Japan LLC. Y-9936 is exemplified, KBM-5803 manufactured by Shin-Etsu Chemical Co., Ltd. is exemplified as methacryloxyoctyltrimethoxysilane, and Shin-Etsu Chemical is exemplified as 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane. KBM-303 manufactured by Kogyo Co., Ltd., A-186 manufactured by Momentive Performance Materials Japan G.K., Z-6043 manufactured by Toray Dow Corning Co., Ltd., and Sila Ace S530 manufactured by Himi Shoji Co., Ltd. As 3-glycidoxypropylmethyldimethoxysilane, , KBM-402 manufactured by Shin-Etsu Chemical Co., Ltd., Z-6044 manufactured by Toray Dow Corning Co., Ltd., Silaace S520 manufactured by Nimi Shoji Co., Ltd. and the like, and as 3-glycidoxypropyltrimethoxysilane Is Shin-Etsu Chemical Co., Ltd. KBM-403, Momentive Performance Materials Japan GK A-187, Toray Dow Corning Z-6040, Asahi Kasei Wacker Silicone Co., Ltd. GENIOSIL GF80, Silami Ace S510 manufactured by Himi Shoji Co., Ltd. and the like, and 3-glycidoxypropylmethyldiethoxysilane includes KBE-402 manufactured by Shin-Etsu Chemical Co., Ltd. As the xylpropyltriethoxysilane, KBE-403 manufactured by Shin-Etsu Chemical Co., Ltd., Momente Examples include A-1871 manufactured by BU Performance Materials Japan GK, GENIOSIL GF82 manufactured by Asahi Kasei Wacker Silicone Co., Ltd., and glycidoxyoctyltrimethoxysilane as a KBM manufactured by Shin-Etsu Chemical Co., Ltd. As N-2- (aminoethyl) -3-aminopropylmethyldimethoxysilane, KBM-602 manufactured by Shin-Etsu Chemical Co., Ltd., A manufactured by Momentive Performance Materials Japan LLC. -2120, GENIOSIL GF-95 manufactured by Asahi Kasei Wacker Silicone Co., Ltd., Silaace S310 manufactured by Nimi Shoji Co., Ltd., and the like. As N-2- (aminoethyl) -3-aminopropyltrimethoxysilane, KBM-603 manufactured by Chemical Industry Co., Ltd. A-1120 manufactured by Eve Performance Materials Japan GK, A-1122 manufactured by Momentive Performance Materials Japan GK, Z-6020 manufactured by Toray Dow Corning Co., Ltd., Toray Dow Corning Z-6094 manufactured by Asahi Kasei Wacker Silicone Co., Ltd., GENIOSIL GF-91, Silaace S320 manufactured by Nimi Shoji Co., Ltd., and the like. As 3-aminopropyltrimethoxysilane, Shin-Etsu Chemical ( KBM-903 manufactured by Co., Ltd., A-1110 manufactured by Momentive Performance Materials Japan G.K., Z-6610 manufactured by Toray Dow Corning Co., Ltd., and Sila Ace S360 manufactured by Nimi Shoji Co., Ltd. As 3-aminopropyltriethoxysilane, KBE 903, A-1100 manufactured by Momentive Performance Materials Japan G.K., Z-6011 manufactured by Toray Dow Corning Co., Ltd., and Silaace S330 manufactured by Nimi Shoji Co., Ltd. Examples of -N- (1,3-dimethyl-butylidene) propylamine include KBE-9103, Silaace S340 manufactured by Nimi Shoji Co., Ltd., and examples of N-phenyl-3-aminopropyltrimethoxysilane include Shin-Etsu. Examples include KBM-573 manufactured by Chemical Industry Co., Ltd., Y-9669 manufactured by Momentive Performance Materials Japan GK, Z-6883 manufactured by Toray Dow Corning Co., Ltd., and the like. As [3- (trimethoxysilyl) propyl] ethylenediamine, manufactured by Nimi Shoji Co., Ltd. Silaace XS1003, and N- (vinylbenzyl) -2-aminoethyl-3-aminopropyltrimethoxysilane hydrochloride include KBM-575 manufactured by Shin-Etsu Chemical Co., Ltd., Toray Dow Corning Co., Ltd. ) Z-6032 manufactured by Niimi Shoji Co., Ltd. and Sylla ace S350 manufactured by Nimi Shoji Co., Ltd. -As mercaptopropylmethyldimethoxysilane, KBE-802 manufactured by Shin-Etsu Chemical Co., Ltd., Z-6852 manufactured by Toray Dow Corning Co., Ltd., and as 3-mercaptopropyltrimethoxysilane, Shin-Etsu Chemical Co., Ltd. KBM-803 made by Momentive Performance Materials Japan Joint Association A-189 manufactured by Toray Dow Corning Co., Ltd., Z-6062 manufactured by Toray Dow Corning Co., Ltd., Sila Ace S810 manufactured by Nimi Shoji Co., Ltd., and the like. As 3-mercaptopropyltriethoxysilane, A-1891 manufactured by Japan GK, Z-6911 manufactured by Toray Dow Corning Co., Ltd., and A-1160 manufactured by Momentive Performance Materials Japan GK are used as 3-ureidopropyltriethoxysilane. Examples of 3-ureidopropyltrialkoxysilane include KBE-585 manufactured by Shin-Etsu Chemical Co., Ltd., and examples of bis (triethoxysilylpropyl) tetrasulfide include KBE manufactured by Shin-Etsu Chemical Co., Ltd. -846, 3-octanoylthio-1- Examples of propyltriethoxysilane include A-LINK599 manufactured by Momentive Performance Materials Japan GK, and examples of 3-isocyanatopropyltriethoxysilane include KBE-9007 manufactured by Shin-Etsu Chemical Co., Ltd. and Momentive. -A-1310 manufactured by Performance Materials Japan GK, etc. are listed. As 3-isocyanatopropyltrimethoxysilane, Y-5187 manufactured by Momentive Performance Materials Japan GK, Asahi Kasei Wacker Silicone Co., Ltd. ) GENIOSIL GF40 and the like.

  When the flame retardant of the component (A) is treated with a silane coupling agent, the amount of the silane coupling agent used is preferably 0.01 to 5.0 mass with respect to 100 parts by mass of the flame retardant of the component (A). Part, more preferably 0.05 to 3.0 parts by weight, still more preferably 0.1 to 2.0 parts by weight.

  In the flame retardant composition of the present invention, the blending amount of the flame retardant of the component (A) is preferably 20 to 60% by mass, more preferably 25 to 55% by mass, and 30 to 50% by mass. More preferably. When the blending amount of the flame retardant of the component (A) is less than 20% by mass, a large amount of the flame retardant composition is required when imparting flame retardancy to the fiber material and the like. There is a tendency for problems in workability to be produced, and when the amount is more than 60% by mass, the dispersibility in water is deteriorated, the viscosity of the flame retardant composition is remarkably increased, and the like. This is not preferred because it tends to cause problems when preparing flame retardant compositions.

  The natural polysaccharide which is the component (B) of the flame retardant composition of the present invention is at least one selected from the group consisting of welan gum, xanthan gum and diyutan gum. Welan gum, xanthan gum and diyutan gum are natural polysaccharides obtained by fermenting polysaccharides such as starch with microorganisms. The structures of welan gum, xanthan gum and diyutan gum are very similar, are formed on the basis of mannose, glucose and glucuronic acid and have a molecular weight of 2 million to 50 million. Moreover, although many carboxyl groups exist in the molecule, welan gum and xanthan gum, which are natural polysaccharides as component (B), include potassium salts, sodium salts, and calcium salts in which the carboxyl groups are salt-exchanged. Welan gum is stronger in heat resistance and suspension stabilization effect. Dieutan gum is less anionic compared to xanthan gum and welan gum, so it is stable even in systems where divalent cations (such as Ca ions) are present in high concentrations. It is also known to exhibit excellent stability against changes in temperature and pH.

  In the flame retardant composition of the present invention, the flame retardant of the component (A) can be dispersed in a large amount with water, and the storage stability of the aqueous dispersion over time is good. It is preferable to use ditan gum as the natural polysaccharide.

Commercially available welan gum can be used, and examples thereof include K1A96 (manufactured by CP Kelco) and WELAN GUM BG3810 [manufactured by Sanki Co., Ltd.].

  A commercially available xanthan gum can also be used. For example, KELTROL (registered trademark) CG series, KELZAN (registered trademark) series [manufactured by Sanki Co., Ltd.], Echo gum (registered trademark) series [DSP Gokyo] Food & Chemical Co., Ltd.].

  Furthermore, a commercially available Diyu tang gum can also be used, for example, KELCO CRETE (registered trademark) DG, KELCO CRETE (registered trademark) DG-F [manufactured by Sanki Co., Ltd.]. .

  In the flame retardant composition of the present invention, the natural polysaccharide of the component (B) is a component for dispersing the flame retardant of the component (A) in water, and when the flame retardant composition is stored for a long period of time, The flame retardant component (A) is a component that is stably present without separation. In order to satisfy these requirements, in the flame retardant composition of the present invention, the blending amount of the natural polysaccharide as the component (B) is preferably 0.01 to 1% by mass, and preferably 0.02 to 0.02. 5 mass% is more preferable and 0.05-0.3 mass% is still more preferable.

  In the flame retardant composition of the present invention, the component (C) is water. Component (C) water constitutes the remainder of the flame retardant composition of the present invention.

  As a method of dispersing the flame retardant of component (A) in water using the natural polysaccharide of component (B), a known water dispersion method can be used. For example, the natural polysaccharide of component (B) A method of dissolving in water and then adding and dispersing the flame retardant of component (A) little by little, or adding a flame retardant of component (A) and a natural polysaccharide of component (B) into water, And a method of dispersing using a homogenizer or a disper.

  When a fiber material is treated using the flame retardant composition of the present invention having the above-described configuration, the flame retardant composition of the present invention can be used as a treatment liquid as it is. It is preferable to use the composition as a diluted treatment solution further diluted with water. It is preferable that a dilution process liquid is between 0.1 mass% to 30 mass% solution of the flame-retardant composition of this invention which is stock solution. If it is less than 0.1% by mass, sufficient flame retardancy may not be obtained, and if it exceeds 30% by mass, an effect commensurate with the consumption of the flame retardant composition may not be obtained. Absent.

  In the treatment liquid comprising the flame retardant composition of the present invention and the dilution treatment liquid further diluted with water, a known additive can be used as necessary, for example, an antioxidant, an ultraviolet absorber, List additives such as water-proofing agents, antiseptics, insecticides, insecticides, dispersants, defoamers, deodorants, fragrances, surfactants, thickeners, viscosity modifiers, dyes and pigments Can do. Among these additives, especially when a surfactant is used, the miscibility of the flame retardant used with water should be improved when mixed with the silicone oil and silane coupling agent listed above. Can do.

  Examples of the surfactant include general anionic surfactants and nonionic surfactants, primary amine salts, secondary amine salts, tertiary amine salts, quaternary amine salts, and pyridinium salts. Cationic surfactants such as amphoteric surfactants such as betaine type, sulfate ester type and sulfonic acid type can be used.

  Examples of the anionic surfactant include alkyl sulfates such as sodium dodecyl sulfate, potassium dodecyl sulfate, ammonium dodecyl sulfate, and polyoxyethylene ether sulfates such as sodium dodecyl polyglycol ether sulfate and ammonium polyoxyethylene alkyl ether sulfate. Alkyl sulfonates such as sodium sulforicinoleate, alkali metal salts of sulfonated paraffin, ammonium salts of sulfonated paraffin; fatty acid salts such as sodium laurate, triethanolamine oleate, triethanolamine abiate; sodium benzenesulfonate, Alkali ants such as alkali metal sulfate of alkali phenol hydroxyethylene It is possible to use the Rusuruhoneto class. In addition, high alkyl naphthalene sulfonate, naphthalene sulfonate formalin condensate, dialkyl sulfosuccinate, polyoxyethylene alkyl sulfate salt, polyoxyethylene alkyl aryl sulfate salt, polyoxyethylene ether phosphate, polyoxyethylene alkyl ether acetic acid A salt, an N-acylamino acid salt, an N-acylmethyltaurine salt, and the like can also be used.

  Examples of the nonionic surfactant include fatty acid partial esters of polyhydric alcohols such as sorbitan monolaurate and sorbitan monooleate, polyoxyethylene glycol fatty acid esters, and polyglycerin fatty acid esters. Furthermore, ethylene oxide and / or propylene oxide adduct of alcohol having 1 to 18 carbon atoms, ethylene oxide and / or propylene oxide adduct of alkylphenol, ethylene oxide and / or propylene oxide adduct of alkylene glycol and / or alkylene diamine, etc. Can be used.

  In addition, the C1-C18 alcohol which comprises the said nonionic surfactant is methanol, ethanol, propanol, 2-propanol, butanol, 2-butanol, tertiary butanol, amyl alcohol, isoamyl alcohol, 3rd, for example. Amyl alcohol, hexanol, octanol, decane alcohol, lauryl alcohol, myristyl alcohol, palmityl alcohol, stearyl alcohol and the like.

  Examples of the alkylphenol include phenol, methylphenol, 2,4-ditertiary butylphenol, 2,5-ditertiary butylphenol, 3,5-ditertiary butylphenol, and 4- (1,3-tetramethylbutyl). ) Phenol, 4-isooctylphenol, 4-nonylphenol, 4-tert-octylphenol, 4-dodecylphenol, 2- (3,5-dimethylheptyl) phenol, 4- (3,5-dimethylheptyl) phenol, naphthol, bisphenol A, bisphenol F, and the like.

  Furthermore, the alkylene glycol is, for example, ethylene glycol, 1,2-propanediol, 1,3-propanediol, 2-methyl-1,3-propanediol, 2-butyl-2-ethyl-1,3-propane. Diol, 1,4-butanediol, neopentyl glycol, 1,5-pentanediol, 3-methyl-1,5-pentanediol, 2,4-diethyl-1,5-pentanediol, and 1,6-hexane Diols and the like.

  The alkylene diamine is, for example, a compound in which the alcoholic hydroxyl group of the alkylene glycol described above is substituted with an amino group. As the ethylene oxide and propylene oxide adduct, both random adducts and block adducts can be used.

  Examples of the cationic surfactant include lauryltrimethylammonium chloride, stearyltrimethylammonium chloride, distearyldimethylammonium chloride, didecyldimethylammonium chloride, laurylbenzyldimethylammonium chloride, didecyldimethylammonium chloride, alkylpyridinium bromide and imidazo. Linium laurate or the like can be used.

  Examples of the amphoteric surfactant include coconut oil fatty acid amidopropyldimethylacetate betaine, lauryldimethylamino acid betaine, 2-alkyl-N-carboxymethyl-N-hydroxymethylimidazolinium betaine, laurylhydroxysulfobetaine, lauroylamidoethyl. Betaine-type amphoteric surfactants such as hydroxyethylcarboxymethylbetaine and metal salts of hydroxypropyl phosphate, amino acid-type amphoteric surfactants such as metal salts of β-laurylaminopropionic acid, sulfate-type amphoteric surfactants and sulfonic acids Type amphoteric surfactants can be used.

  In addition, as the usage-amount of surfactant, it is preferable that it is 1-10 mass% with respect to the total amount of a flame-retardant composition, and it is preferable that it is 3-7 mass%.

  Further, the method of treating the fiber using the treatment liquid or the diluted treatment liquid is not particularly limited, and for example, the treatment liquid or the diluted treatment liquid is obtained by any method such as a putting method, a coating method, a spray method, or the like. It can be applied to the fiber material. At this time, the drying conditions after applying the treatment liquid or the dilution treatment liquid are not particularly limited, and may be air-dried at room temperature for about 1 day to 2 weeks, or at 80 to 200 ° C. for about 30 seconds to 3 minutes. It may be dried quickly.

  Flame retardancy can be imparted by treating the fiber material using a treatment liquid comprising the flame retardant composition in the present invention or a diluted treatment liquid obtained by diluting the flame retardant composition, Examples of fiber materials that can be treated include natural fibers such as hair fibers, wool fibers, silk fibers, hemp fibers, angora fibers, mohair fibers, and asbestos fibers; regenerated fibers such as rayon fibers and Bemberg fibers; acetate fibers and the like Semi-synthetic fiber: synthetic fiber such as polyester fiber, polyamide fiber, polyacrylonitrile fiber, polyvinyl chloride fiber, vinylon fiber, polyethylene fiber, polypropylene fiber, carbon fiber, spandex fiber; leather materials such as artificial leather and synthetic leather It is done. Among these, semi-synthetic fibers and synthetic fibers are preferable, synthetic fibers are more preferable, and polyester fibers are most preferable. Moreover, you may use together the fiber material illustrated above and inorganic fibers, such as glass fiber.

Hereinafter, the present invention will be specifically described by way of examples. In the following examples and the like, “%” is based on mass unless otherwise specified.
The raw materials used in preparing the product of the present invention and the comparative product are as follows:
(A) component: flame retardant piperazine pyrophosphate melamine pyrophosphate melamine polyphosphate phosphorus compound 1: compound represented by the above formula (1-1) phosphorus compound 2: compound represented by the above formula (1-2) phosphorus compound 3: Compound represented by the above formula (1-3) Phosphorus compound 4: In the above general formula (2), R ² and R ³ are both ethyl groups, m is 3, and M is Al. B) Ingredient: Natural polysaccharide Welan gum: [WELAN GUM BG3810; manufactured by Sanki Co., Ltd.]
Xanthan gum: [KELZAN; manufactured by Sanki Co., Ltd.]
Dieutan gum: [KELCO-CRETE DG; manufactured by Sanki Co., Ltd.]
Additives Adekatol SP-12: Nonionic alkylphenol type surfactant [Co., Ltd.
Made by ADEKA]
Emulgen A-90: Nonionic alkylphenol type surfactant [manufactured by Kao Corporation]
Adecatol UA-90N: primary alcohol ethoxylate [manufactured by ADEKA Corporation]
Adecatol TN-80: primary alcohol ethoxylate [manufactured by ADEKA Corporation]
Adeka Pluronic F-68: EO / PO block polymer [manufactured by ADEKA Corporation]
Adeka Pluronic F-108: EO / PO block polymer [manufactured by ADEKA Corporation]

Example 1
In a 200 ml beaker, 30 g of water and 0.09 g of diutan gum were added and stirred at 25 ° C. for 5 minutes to dissolve the diutan gum. Thereafter, 20 g of piperazine pyrophosphate (PPP) was added, stirred for 10 minutes, and PPP was dispersed using a homomixer to obtain Product 1 of the present invention. Moreover, this invention products 2-22 and the comparative products 1-14 were prepared with the compounding ratio described in the following table | surfaces by the same method.

Next, for the obtained inventive products 1 to 22 and comparative products 1 to 14, the storage stability was evaluated as follows:
[Method for evaluating storage stability]
Inventive products 1 to 22 or comparative products 1 to 14 are transferred to two screw tubes, 50 g each, covered and sealed in a thermostatic bath at 25 ° C. and 40 ° C., respectively, one day later, and 4 The appearance after the day was visually confirmed. The evaluation criteria are as follows:
A: No change in appearance B: Water floating occurs at the top of the dispersion C: 10% or more of the flame retardant is separated at the bottom of the screw tube In the above evaluation, Evaluation Criteria A from the viewpoint of workability and practicality , B was accepted.
The evaluation results are shown in the following table.

Example 2
The diluted product liquid 4 was prepared by diluting the product 4 of the present invention with water to a concentration of 10% by mass. A test cloth [Polyester Tropical: manufactured by Teijin Ltd.] was immersed in the diluted solution 4 and then dried at 100 ° C. for 1 hour and further at 180 ° C. for 1 minute to obtain a test cloth. In the same manner, the diluted processing solutions 12, 20, 21, 22, and 23 are used for the inventive products 12, 20, 21, 22, and 23, and the comparative diluted processing solutions 2 and 4 are used for the comparative products 2 and 4. And the test fabric was treated in the same manner.

Next, the flame resistance of the obtained test cloth was evaluated by the 45 ° coil method shown below.
[45 ° coil method]
-The test cloth was cut to have a width of 10 cm and a mass of 1 g, and was rolled and inserted into a support coil (made of stainless steel wire having a diameter of 0.5 mm);
-The support coil into which the test cloth was inserted was fixed at 45 ° and flame contacted with a gas burner from the lower end of the test cloth;
・ When the fire was extinguished, repeated flame contact and recorded the number of flame contact until the test cloth burned out;
-Flame contact was performed up to 5 times, and the length (cm) was recorded when there was unburned residue.
The results obtained are listed in Table 6.

  As can be seen from the results in Tables 1 to 3, the product of the present invention was not confirmed to separate the flame retardant over time, and was found to be excellent in storage stability. Furthermore, even in the flame retardancy evaluation of the test cloth treated with the diluted treatment solution of the present invention, the unburned residue of the test piece was confirmed even when the flame contact was performed 5 times, and it has a very high flame retardancy. I understood that. It was found that all the comparative products without natural polysaccharides separated the flame retardant over time, and satisfactory results were not obtained even in the flame retardant evaluation of the test cloth with the diluted solution of the comparative product. I understood that.

Claims (7)

(A) component: at least one flame retardant selected from the group consisting of the following (A-1) to (A-4), (B) component: selected from the group consisting of welan gum, xanthan gum and diutan gum A flame retardant composition comprising at least one natural polysaccharide and component (C): water.
(A-1) at least one melamine salt selected from the group consisting of melamine orthophosphate, melamine pyrophosphate and melamine polyphosphate;
(A-2) at least one piperazine salt selected from the group consisting of piperazine orthophosphate, piperazine pyrophosphate and piperazine polyphosphate;
(A-3) Phosphorus compound represented by the following general formula (1)

(In the formula, n represents 1 or 2, and when n is 1, R ¹ is unsubstituted or substituted with a hydrogen atom, a hydroxyl group, a halogen atom, a cyano group, or a carboxyl group having 1 to 20 carbon atoms. When n is 2, it represents an unsubstituted or divalent hydrocarbon group substituted with a hydroxyl group, a halogen atom, a cyano group, or a carboxyl group.
(A-4) At least one compound selected from the group consisting of dialkylphosphinic acids and salts thereof represented by the following general formula (2)

(In the formula, R ² and R ³ each independently represent an alkyl group having 1 to 6 carbon atoms, and M represents Mg, Ca, Al, Sb, Sn, Ge, Ti, Fe, Zr, Zn, Ce. , Bi, Sr, Mn, Li, Na, K, H, or a protonated nitrogen base, and m represents an integer of 1 to 4.)   The flame retardant composition according to claim 1, wherein the component (A) is a component (A-1) and a component (A-2).   The flame retardant composition according to claim 2, wherein the mass ratio of (A-1) component / (A-2) component is 20/80 to 50/50.   The flame retardant composition according to any one of claims 1 to 3, wherein the content of the component (A) is 20 to 60 mass% with respect to the total amount of the flame retardant composition.   The flame retardant composition according to any one of claims 1 to 4, wherein the content of the component (B) is 0.01 to 1% by mass relative to the total amount of the flame retardant composition.   Furthermore, antioxidants, UV absorbers, water resistance agents, antiseptics, antiseptics, insecticides, dispersants, antifoaming agents, deodorants, fragrances, surfactants, thickeners, viscosity modifiers, dyes and The flame retardant composition according to any one of claims 1 to 5, comprising at least one additive selected from the group consisting of pigments.   A method for producing a flame-retardant fiber, comprising treating a fiber material with a treatment liquid comprising the flame-retardant composition according to any one of claims 1 to 6 or a dilution treatment liquid thereof.