JP5778457B2 - Flame retardant composition for polyurethane, flame retardant polyurethane and flame retardant polyurethane foam produced using the same - Google Patents

Description

  The present invention relates to a flame retardant composition for polyurethane excellent in storage stability, a flame retardant polyurethane and a flame retardant polyurethane foam produced by adding the same.

  Polyurethane is mainly produced by the reaction of isocyanates and polyols, and is widely used in cushioning materials for vehicles and furniture, construction materials, storage tanks, thermal insulation materials and structural materials for ships, etc. Phosphoric acid esters and phosphoric acid esters have been mainly used. However, flame retardants containing halogens tend to cause corrosion of equipment, discoloration of materials, and the like, and tend to be disliked from the viewpoint of environmental impact. Since phosphate ester has a plasticizing action, there is a problem that mechanical properties such as compressive strength are reduced and shrinkage is caused. Therefore, it is required to reduce the amount of phosphate ester used and to substitute a flame retardant that does not adversely affect the physical properties. Examples of other flame retardants include melamine and red phosphorus, but melamine has a problem in terms of physical properties, moldability, and economy because it needs to be blended in a large amount of about 30% of the entire polyurethane raw material. On the other hand, red phosphorus can be made flame retardant by blending a relatively small amount. For example, Patent Document 1 discloses flame retardant of a flexible polyurethane foam by a composite flame retardant combining ammonium polyphosphate and red phosphorus. .

Japanese Patent Laid-Open No. 10-147623

However, both ammonium polyphosphate and red phosphorus are powders having a large specific gravity that is insoluble in isocyanates and polyols. In particular, red phosphorus has a large specific gravity of 2.2. When polyurethane is generated immediately after adding the composite flame retardant of Patent Document 1, it does not matter so much, but if this composite flame retardant is mixed with any of the polyurethane raw materials and there are days before reacting, after a while The problem of sedimentation may occur that a uniform composition cannot be obtained.
That is, since polyurethane is produced by the reaction of isocyanate and polyol as described above, when a product form in which powdered flame retardant is blended with either isocyanate or polyol or an organic phosphate used as a flame retardant is used. During the storage and distribution process, the powdered flame retardant settles, sometimes requiring a stirring step, and when the sedimentation is significant, it becomes hard to transfer from the packaging container because it hardens into a cake. Furthermore, when the flame retardant polyurethane foam is used as the final object, the resulting polyurethane foam has a non-uniform composition and is of low quality. Under the present circumstances, since the raw material of polyurethane is usually stored for a period of one month until it is used after being blended, there is a demand for a flame retardant that does not settle for about one month after mixing.

The present invention has been made in view of the above problems, and as a flame retardant for polyurethane, particularly polyurethane foam, red phosphorus having a high flame retardant effect is uniformly dispersed, and storage stability after mixing with other raw materials is also achieved. It is an object to provide an excellent flame retardant composition.
Another object of the present invention is to provide a flame retardant polyurethane and a flame retardant polyurethane foam produced using the flame retardant composition.
As a result, red phosphorus can be used alone as a flame retardant, and in that case, the amount of the flame retardant used can be suppressed to a small amount, so there is little influence on physical properties, and in the composition Since it disperses uniformly, the physical properties of the polyurethane, which is the final object, are also good and uniform. In addition, since no halogen-containing flame retardant is used, there is no corrosion of the equipment or discoloration of the material, which can contribute to environmental conservation. When red phosphorus and phosphate ester are used together as a flame retardant, the amount of phosphate ester used can be reduced, so the physical properties are improved and the corrosion of equipment and discoloration of materials are suppressed while utilizing the plasticity of phosphate ester. Can contribute to the reduction of environmental impact.

The flame retardant composition of the present invention, the flame retardant polyurethane and the flame retardant polyurethane foam produced by using the flame retardant composition, and the flame retardant polyurethane foam, which solve the problem, are as follows.
(1) A flame retardant composition for polyurethane containing (A) 3 to 50% by mass of red phosphorus and (B) 0.2 to 15% by mass of an anti-settling agent.
(2) The flame retardant composition for polyurethane according to the above (1), wherein the settling inhibitor is at least one selected from carbon black, finely divided silica, hydrogenated castor oil wax, fatty acid amide wax and organic clay.
(3) The flame retardant composition for polyurethane according to (1) or (2) above, containing 5 to 14% by mass of carbon black as an anti-settling agent.
(4) The flame retardant composition for polyurethane according to (1) or (2) above, containing 2 to 10% by mass of finely divided silica as an anti-settling agent.
(5) The flame retardant composition for polyurethane according to (1) or (2) above, containing 0.2 to 5% by mass of hydrogenated castor oil wax or fatty acid amide wax as an anti-settling agent.
(6) The flame retardant composition for polyurethane according to (1) or (2) above, containing 2 to 10% by mass of organic clay as an anti-settling agent.
(7) The flame retardant composition for polyurethane according to any one of (1) to (6), wherein red phosphorus and an anti-settling agent are dispersed in a medium selected from a phosphate ester, a polyol and an isocyanate.
(8) The flame retardant composition for polyurethane according to the above (7), wherein the medium is a phosphate ester and the settling inhibitor is at least one selected from carbon black, fatty acid amide wax and organic clay.
(9) The flame retardant composition for polyurethane according to the above (7), wherein the medium is a polyol and the settling inhibitor is at least one selected from finely divided silica, carbon black, and fatty acid amide wax.
(10) The flame retardant composition for polyurethane according to the above (7), wherein the medium is isocyanate and the settling inhibitor is at least one selected from fine silica, carbon black, fatty acid amide wax and organic clay.
(11) A flame-retardant polyurethane produced by adding the polyurethane flame retardant composition according to any one of (1) to (10).
(12) A flame retardant polyurethane foam produced by adding the flame retardant composition for polyurethane according to any one of (1) to (10) above.

  According to the present invention, each component is uniformly dispersed in the composition, the flame retardant composition for polyurethane having excellent storage stability after mixing with other raw materials, and good and uniform flame retardancy A polyurethane can be provided. Moreover, according to the said flame retardant composition for polyurethanes, a flame-retardant polyurethane foam with favorable and uniform physical properties can be provided.

Polyurethane is usually produced by mixing and reacting a polyol component and an isocyanate component, which are main components, and, if necessary, blending components such as a flame retardant, a foaming agent, a catalyst, and a curing agent. Since this reaction proceeds by mixing the polyol component and the isocyanate component, when the raw materials are distributed and stored, the reaction is divided into two liquids, a liquid mainly composed of polyol and a liquid mainly composed of isocyanate. ing. Compounding ingredients other than the main component are added to either liquid, but usually, distribution and storage are performed as a polyol premix in which a polyol component is mixed with a flame retardant or other compounding ingredients. Moreover, distribution and storage may be performed as an isocyanate premix in which a flame retardant or other compounding component is mixed with an isocyanate component. Phosphate ester generally used as a flame retardant is usually contained in a polyol premix, but a liquid mainly composed of phosphate ester is prepared as a third liquid separately from the above two liquids. In some cases, storage is performed.
Hereinafter, embodiments of the flame retardant composition for polyurethane, the flame retardant polyurethane and the flame retardant polyurethane foam of the present invention will be described in detail.

(Flame retardant composition for polyurethane)
The flame retardant composition for polyurethane of the present invention comprises 3 to 50% by mass of red phosphorus and 0.2 to 15% by mass of an anti-settling agent.
A preferred embodiment of the present invention is a flame retardant composition for polyurethane in which 3 to 50% by weight of red phosphorus and 0.2 to 15% by weight of an antisettling agent are dispersed using phosphate ester, polyol or isocyanate as a medium. is there.

1. Red phosphorus In the present invention, red phosphorus is added for the purpose of imparting flame retardancy.
As red phosphorus, untreated red phosphorus generally used, red phosphorus coated with a resin film, a metal hydroxide film, or the like can be used. Although not particularly limited, handling is easy. From the viewpoint of the above, it is preferably red phosphorus that has been coated. Further, the particle size is not particularly limited, but those distributed as red phosphorus flame retardants can be used, and the average particle size is usually 100 μm or less, and this particle size is preferably dispersed uniformly as a flame retardant. When it passes through the process of spray foaming or the process of injecting into a reactor with a pump at the time or in use, it is particularly preferably 20 μm or less.
Red phosphorus is contained in an amount of 3 to 50% by mass based on the total amount of the flame retardant composition for polyurethane. If the amount is less than 3% by mass, the effect of flame retardancy cannot be obtained, and if it exceeds 50% by mass, the fluidity is lost and a uniform liquid or pasty mixture cannot be obtained.
In addition, as a flame retardant composition for polyurethane of the present invention or a pre-preparation thereof, when producing a masterbatch containing red phosphorus at a high concentration, the higher the red phosphorus content, the more cost-effective. However, as described above, when the amount of red phosphorus exceeds 50% by mass, a uniform mixture cannot be obtained. Therefore, the red phosphorus content is appropriately adjusted according to the blending components, for example, 10 to 50% by mass of red phosphorus, preferably May be contained in an amount of 20 to 50% by mass.

2. Anti-settling agent In the present invention, the anti-settling agent is added for the purpose of uniformly dispersing red phosphorus, which is the main component of the flame retardant.
The anti-settling agent is not particularly limited, but it is preferable to use carbon black, finely divided silica, hydrogenated castor oil wax, fatty acid amide wax and organic clay alone or in combination of two or more, particularly in a small amount. It is preferable to use a fatty acid amide wax-based anti-settling agent having a stable anti-settling property.
The antisettling agent is contained in an amount of 0.2 to 15% by mass based on the total amount of the flame retardant composition for polyurethane. When the amount is less than 0.2% by mass, the effect of preventing sedimentation is weakened. When the amount exceeds 15% by mass, the viscosity increases and a liquid or paste-like mixture cannot be obtained, resulting in poor handling.

Further, the optimum addition amount of the anti-settling agent varies depending on the type thereof, 5 to 14% by mass when carbon black is used, 2 to 10% by mass when fine silica is used, and 2 when organic clay is used. It is more preferable to add 10 mass%. When hydrogenated castor oil wax or fatty acid amide wax is used, it is more preferable to add 0.2 to 5% by mass, particularly preferably 0.3 to 3% by mass, based on the active wax component (solid content). .
When preparing a masterbatch containing red phosphorus at a high concentration as the flame retardant composition for polyurethane of the present invention or a preliminary preparation thereof, an amount of anti-settling agent that prevents sedimentation of the red phosphorus component after dilution Needs to be added in advance, and it is preferable to contain the anti-settling agent in an amount of 0.2 to 15% by mass after dilution. For example, when preparing a master batch of 20% by weight of red phosphorus for producing a polyol premix of 10% by weight of red phosphorus, if 7% by weight of carbon black is required in the diluted polyol premix, It is preferable to add a large amount in consideration of storage after dilution, such as addition by mass%.

  The carbon black used in the present invention is not particularly limited, and may be produced by any manufacturing method such as a furnace method, a channel method, or a thermal method.

  The finely divided silica used in the present invention is called fumed silica, colloidal silica, silica gel or the like. For example, Aerosil (registered trademark) “90”, “130”, “150”, “200” manufactured by Nippon Aerosil Co., Ltd. , “300”, “380”, “R 972”, “R 974”, “R 104”, “R 106”, “R 202”, “Fine Seal FM Series” manufactured by Tokuyama, etc. It is not limited.

The wax-based antisettling agent used in the present invention is a hydrogenated castor oil wax or a fatty acid amide wax synthesized from a vegetable oil fatty acid and an amine. These form a swollen gel structure in a liquid, and those commercially available as thixotropic agents, thickeners, anti-settling agents, anti-sagging agents and the like are readily available. Among the wax-based anti-settling agents, fatty acid amide waxes are preferable because they have a high melting point and hardly generate aggregates.
Commercially available products of fatty acid amide wax include powdered products containing only fatty acid amide wax components, and pre-swelling types in which fatty acid amide wax is pasted in a solvent. For example, Disparon (registered trademark) “ “A603-20X”, “A603-10X”, “6500”, “6650”, “6700” can be used. In addition, it may be a product combined with another component having thixotropic properties.

  The organic clay used in the present invention is a clay treated with an organic compound in order to improve the affinity with the medium to be added. Examples of the clay include montmorillonite, bentonite, smectite, beidellite, hectorite, saponite, and slabenite. Bentonite treated with quaternary ammonium can be easily obtained as a commercial product of organic clay.

3. Medium In the present invention, the medium disperses red phosphorus and an antisettling agent, and is not particularly limited, but is preferably a phosphate ester, a polyol or an isocyanate. These media can be a raw material component of the flame retardant polyurethane which is the final object. For example, a master batch containing a high concentration of red phosphorus using a phosphate ester as a medium is a “composite flame retardant”, and a red phosphorus flame retardant master containing a high concentration of red phosphorus using a polyol as a medium. As a batch or as a "polyol premix" containing red phosphorus together with other additives in a polyol, as a red phosphorus flame retardant masterbatch containing high concentrations of red phosphorus using isocyanate as a medium, isocyanate It can be used as an “isocyanate premix” containing red phosphorus together with other additives. Here, “containing red phosphorus at a high concentration” means containing 10 to 50% by mass of red phosphorus.
The medium is preferably contained at least 35% by mass with respect to the total amount of the flame retardant composition for polyurethane. By setting it as this range, the liquid or paste-like mixture with which the compounding component was disperse | distributed uniformly can be obtained easily.

  The phosphate ester used in the present invention is not particularly limited. For example, tris (2-chloroethyl) phosphate, tris (chloropropyl) phosphate, tris (dichloropropyl) phosphate, tris (tribromoneopentyl) phosphate And other halogen-containing condensed phosphates. In addition to the effect as a flame retardant, phosphate esters have the effect of reducing the viscosity of the polyurethane foam stock solution when the final product is a polyurethane foam, improving the stirring efficiency and improving the homogeneity of the resulting molded product. Have For this reason, it can be suitably used as a medium.

  The polyol used in the present invention is preferably a polyol that is a raw material for polyurethane, and particularly preferably a polyol that is a raw material for polyurethane foam. When the final product is a polyurethane foam, a polyether polyol polyoxypropylene-glyceryl ether (hereinafter referred to as “PPG”), a polymer polyol, trimethylolpropane (TMP), 1,3-propanediol (1,1, 3-PDO) can be used, but is not limited thereto. PPG can be applied to uses such as flexible polyurethane foam, rigid polyurethane foam, and polyurethane elastomer by adjusting the number of functional groups and the molecular weight per functional group.

PPG is obtained by adding an alkylene oxide to an active hydrogen-containing compound. PPGs for producing rigid polyurethane foam are generally suitable for those having 3 to 8 functional groups and a molecular weight per functional group of 60 to 200. As the PPG for producing flexible polyurethane foam, those having 3 to 8 functional groups and a molecular weight per functional group of 700 to 3000 are generally suitable. As PPG for producing urethane elastomers, 2 to 3 functional groups, A molecular weight of 100 to 3000 per functional group is generally suitable. For active hydrogen-containing compounds, ethylene glycol or propylene glycol as the bifunctional, glycerin or trimethylolpropane as the trifunctional, pentaerythritol as the tetrafunctional, sorbitol as the hexafunctional, sucrose as the 8-functional is suitably used In addition, ethylenediamine or toluylenediamine as tetrafunctional and diethylenetriamine as pentafunctional can be used, but are not limited thereto.
The polymer polyol is obtained by radical polymerization of acrylonitrile, styrene or the like in PPG.
Also in the case of producing a master batch containing red phosphorus in a high concentration, it is preferable to use the above polyol. The polyol component is also selected according to the properties and properties required for the final polyurethane, but if the amount of polyol in the masterbatch is small in the entire polyurethane and the properties and properties of the desired polyurethane are not impaired, polyurethane Polyol, for example, for the production of rigid polyurethane foam, the number of functional groups is 3-8, PPG having a molecular weight per functional group of 60-200, for the production of flexible polyurethane foam, the number of functional groups is 3-8, For production of PPG having a molecular weight per functional group of 700 to 3000 and urethane elastomer, PPG having a functional group number of 2 to 3 and a molecular weight per functional group of 100 to 3000 may be used. There is no need to use different polyols for masterbatch depending on the It becomes the red phosphorus-based flame retardant masterbatch.

The isocyanate used in the present invention is preferably an isocyanate that is a raw material for polyurethane, and is particularly preferably an isocyanate that is a raw material for polyurethane foam. When the final object is a polyurethane foam, for example, aromatic polyisocyanate compounds such as diphenylmethane diisocyanate and tolylene diisocyanate, alicyclic polyisocyanates such as isophorone diisocyanate, and aliphatic polyisocyanates such as hexamethylene diisocyanate In addition to these, xylylene diisocyanate, naphthalene diisocyanate, tetramethylene xylylene diisocyanate, dicyclohexylmethane diisocyanate, trimethylhexamethylene diisocyanate, dimer acid Diisocyanate and the like can be used. Moreover, the polymer (polymeric body) of these isocyanate can also be used, Furthermore, these 2 or more types of mixtures can also be used.
Also when producing a masterbatch containing red phosphorus at a high concentration, it is preferable to use the above-mentioned isocyanate. Isocyanate components are selected depending on the properties and properties required for the final polyurethane, but if the amount of isocyanate in the masterbatch is small in the entire polyurethane and the properties and properties of the desired polyurethane are not impaired, polyurethane In this case, there is no need to use different isocyanates for the masterbatch according to the purpose of use, and a red phosphorus flame retardant masterbatch using a general-purpose isocyanate as a medium. Become.

  As the anti-settling agent, it is desirable to select a suitable anti-settling agent for the medium to be used from the viewpoint of settling suppression. When the medium is a phosphate ester, the anti-settling agent is preferably at least one selected from carbon black, fatty acid amide wax, and organic clay. When the medium is a polyol, the anti-settling agent is finely divided silica. , Preferably at least one selected from carbon black and fatty acid amide wax. When the medium is an isocyanate, the settling inhibitor is at least one selected from finely divided silica, carbon black, fatty acid amide wax and organic clay. It is preferable that

4). Other Additives The flame retardant composition for polyurethane of the present invention can contain other additives, and particularly when it is a flame retardant composition for polyurethane foam, a curing agent, a crosslinking agent, and a catalyst for forming polyurethane. , Foaming agents, deterioration inhibitors, plasticizers, foam stabilizers and the like. Moreover, as flame retardants other than red phosphorus, phosphoric acid esters, ammonium polyphosphate, melamine polyphosphate, aluminum hydroxide, magnesium hydroxide, and melamine can be included. In addition, about phosphate ester, it may mix | blend as a medium as mentioned above.

5. Production Method The flame retardant composition for polyurethane of the present invention can be produced, for example, by uniformly dispersing red phosphorus, an anti-settling agent and other additives in a liquid medium.
As a dispersion method, various dispersion methods in which the compounding ingredients are uniformly dispersed can be used. As the stirrer, a general-purpose stirrer, a disper disperser, a dissolver, a kneader, or the like can be used. When hydrogenated castor oil wax or fatty acid amide wax is used as an anti-settling agent, a certain amount of shearing force is required for uniform mixing, and a stirrer with strong shearing force such as a homogenizer or sand mill may be used. preferable.
In the dispersion step, all the components such as red phosphorus, anti-settling agent, polyurethane raw material component, and other additives can be mixed and dispersed in one operation. In addition, when the above master batch is used as a preliminary preparation, or when a dispersion in which hydrogenated castor oil wax or fatty acid amide wax is contained in a polyurethane raw material component or solvent in a solid content of several tens of percent in advance is prepared, Other blending components can be added and mixed and dispersed at a desired concentration.

6). Applications The flame retardant composition for polyurethane of the present invention can be used for the production of various flame retardant polyurethanes, and is suitable for the production of flame retardant polyurethane foams, flame retardant polyurethane elastomers, and the like. Especially, it is suitable for manufacture of a flame-retardant polyurethane foam, and can be used suitably especially for manufacture of a flexible polyurethane foam, a semi-rigid polyurethane foam, and a rigid polyurethane foam.

(Flame retardant polyurethane, flame retardant polyurethane foam)
The flame retardant polyurethane of the present invention can be produced by adding the above-described flame retardant composition for polyurethane of the present invention. As a method for producing the flame retardant polyurethane foam, a known production method such as slab foaming, mold foaming, injection foaming, spray foaming, laminating or the like can be applied. As a method for producing a flame retardant polyurethane elastomer, known methods such as casting, reaction injection molding (RIM), caulking, etc. for a thermosetting type, and injection molding, extrusion molding, calendar molding, polymer blending, etc. for a thermoplastic type Can be applied.

  About the addition amount of the flame retardant composition for polyurethane of the present invention, it is preferable that the red phosphorus is in a range of 1.5 to 20% by mass with respect to the total amount of the flame retardant polyurethane which is the final object. The amount of red phosphorus required varies depending on the raw material of the polyurethane, its blending ratio, and the required flame retardant level. For example, in the case of a polyurethane foam in which the mass ratio of the polyol component to the isocyanate component is 100: 155, it can be flame retardant with a red phosphorus content of about 7% by mass relative to the total amount of the flame retardant polyurethane foam.

The present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.
(Production of flame retardant compositions of Examples 1 to 13 and Comparative Examples 1 to 3)
The raw materials shown in Table 1 were weighed according to the blending amount and stirred using a stirrer until they were uniformly mixed to prepare a flame retardant composition. For Example 3, Example 5, Example 7, Example 8 and Example 12 using fatty acid amide wax, polyol, phosphate ester or isocyanate was added in advance so that the fatty acid amide wax would be 10%. Then, after uniform mixing using a homogenizer manufactured by Nippon Seiki Seisakusho Co., a predetermined polyol, phosphate ester, isocyanate and red phosphorus were added and stirred using a stirrer.

(Production of flame retardant compositions of Examples 14 to 16)
The high-concentration products and polyols of Examples 11 to 13 were weighed according to the blending amounts shown in Table 2, and stirred using a stirrer until they were uniformly mixed to prepare a flame retardant composition.

About the raw material of Table 1 and Table 2, the following were used, respectively.
Polyol A: PPG-3000, “UNIOL TG-3000” manufactured by NOF Corporation
Polyol B: PPG-330, “Uniol TG-330” manufactured by NOF Corporation
Phosphate ester C: Tris (chloropropyl) phosphate, “TMCPP” manufactured by Daihachi Chemical Industry Co., Ltd.
Phosphoric ester D: “CR-570” manufactured by Daihachi Chemical Industry Co., Ltd.
Isocyanate: Polymeric MDI, “Millionate MR-200” manufactured by Nippon Polyurethane Industry Co., Ltd.
Red phosphorus E: “Novared 120UFA” manufactured by Rin Chemical Industry Co., Ltd. Average particle size: 8 μm
Red phosphorus F: “Nova Excel 140F” manufactured by Rin Chemical Industry Co., Ltd. Average particle size: 11 μm
Anti-settling agent G: “Carbon black MA220” manufactured by Mitsubishi Chemical Corporation
Anti-settling agent H: Fumed silica, “Aerosil 300” manufactured by Nippon Aerosil Co., Ltd.
Anti-settling agent I: fumed silica, “Aerosil R972” manufactured by Nippon Aerosil Co., Ltd.
Anti-settling agent J: fatty acid amide wax, “Disparon A603-20X” manufactured by Enomoto Kasei Co., Ltd., 20% active ingredient
Anti-settling agent K: Organic bentonite, “Esven NZ” manufactured by Hojun Co., Ltd.
Anti-settling agent L: Organic bentonite, “Esven NO12S” manufactured by Hojun Co., Ltd.

(Sedimentation test)
In order to check the dispersion stability of each flame retardant composition obtained above, the following sedimentation test was performed.
The flame retardant composition is allowed to stand at room temperature for 4 weeks, and at the time of 1 week, 2 weeks, 3 weeks, and 4 weeks, the total liquid height and the height of the supernatant portion are measured. The proportion occupied was calculated. The results are shown in Tables 1 and 2.

As the result of Comparative Example 1 shows, in the flame retardant composition in which only red phosphorus is mixed with the polyol, precipitation starts after one week, but as the results of Examples 1 to 5 show, the precipitation prevention By adding carbon black, finely divided silica, fatty acid amide, and organic clay as agents, settling could be prevented for at least 4 weeks. Moreover, also in the medium containing a phosphate ester as in Examples 6, 7, and 13, precipitation could be prevented by adding carbon black, fatty acid amide, and organic clay. As shown in the results of Comparative Example 2, in the flame retardant composition in which only red phosphorus was added to the isocyanate, sedimentation started after one week, but as shown in the results of Examples 8 to 10, fine powder Settling could be prevented for at least 4 weeks by adding silica, fatty acid amide, and organoclay.
Furthermore, in Examples 11 to 13 containing red phosphorus at a high concentration assuming a masterbatch, sedimentation can be prevented for at least 4 weeks by adding an anti-settling agent. Sedimentation could also be prevented in Examples 14 to 16 that were supposed to be mixed.

  The flame retardant composition for polyurethane of the present invention contains red phosphorus and can be used as a flame retardant for polyurethane. The flame retardant composition for polyurethane of the present invention can be used for the production of flame retardant polyurethane, in particular flame retardant polyurethane foam, and bedding / car seat / cushion material, sound absorbing material, vibration damping material, electric refrigerator / building material, etc. It can be used for applications such as thermal insulation and construction flooring.

Claims (11)

(A) 3-50 mass% red phosphorus,
(B) Anti-settling agent 0.2-15 mass%
A flame retardant composition for polyurethanes comprising red phosphorus and an anti-settling agent dispersed in a polyol, wherein the anti-settling agent is a fatty acid amide wax and / or an organic clay. (A) 3-50 mass% red phosphorus,
(B) Anti-settling agent 0.2-15 mass%
A polyurethane for flame retardant composition comprising red phosphorus and anti-settling agent are dispersed in a phosphoric acid ester, and is at least one anti-settling agent is selected from fatty acid amide waxes and organoclay A flame retardant composition for polyurethane. (A) 3-50 mass% red phosphorus,
(B) Anti-settling agent 0.2-15 mass%
A flame retardant composition for polyurethane containing red phosphorus and an anti-settling agent dispersed in a phosphate ester, the anti-settling agent being carbon black, and a carbon black content of 5 to 14% by mass A flame retardant composition for polyurethane. The flame retardant composition for polyurethane according to claim 2 or 3, wherein red phosphorus and an anti-settling agent are dispersed in a mixture of a phosphate ester and a polyol. (A) 3-50 mass% red phosphorus,
(B) Anti-settling agent 0.2-15 mass%
A flame retardant composition for polyurethane, wherein red phosphorus and an anti-settling agent are dispersed in an isocyanate, and the anti-settling agent is at least one selected from finely divided silica, carbon black, fatty acid amide wax and organic clay. Urethane for flame retardant compositions of the content of claim 5 Symbol mounting is 5 to 14% by weight of carbon black. The flame retardant composition for polyurethane according to claim 5 , wherein the finely divided silica is 2 to 10% by mass. The flame retardant composition for polyurethane according to any one of claims 1 , 2, 4, and 5, wherein the fatty acid amide wax is 0.2 to 5% by mass. The flame retardant composition for polyurethane according to any one of claims 1 , 2, 4, and 5, wherein the organic clay is 2 to 10% by mass. Flame-retardant polyurethane produced the claims 1 or 2 Symbol placement for polyurethane flame retardant composition added. A flame retardant polyurethane foam produced by adding the polyurethane flame retardant composition according to any one of claims 1 to 9 .