KR102614474B1 - Flame retardant composition and semi-non-flammable urthane insulation using the same - Google Patents

Abstract

The present invention provides (A) a flame retardant composition containing 10 to 40 parts by weight of phosphorus and 5 to 30 parts by weight of aluminum hydroxide based on 100 parts by weight of a liquid phosphorus-based dispersant, (B) a polyol composition, and (C) a polyurethane-based composition containing an isocyanate-based compound. It relates to a foaming composition.
The foam manufactured from the polyurethane-based foam composition according to the present invention has semi-non-flammable performance and can suppress the amount of harmful gases generated in the event of a fire.

Description

Flame retardant composition and semi-non-combustible urethane insulation using the same {FLAME RETARDANT COMPOSITION AND SEMI-NON-FLAMMABLE URTHANE INSULATION USING THE SAME}

The present invention relates to a semi-incombustible polyurethane insulation material included between color steel sheets or surface materials made of aluminum, and more specifically, to a semi-incombustible polyurethane-based insulation material made from a composition containing a flame retardant composition, a polyol composition, and an isocyanate-based compound. It relates to foam and semi-non-combustible polyurethane insulation using the same.

Architectural insulation is an element that provides coolness in the summer and warmth in the winter, so it is a material that cannot be removed when constructing a building. On the other hand, incidents in which fires spread due to building insulation materials often occur, and many researchers have recently focused their attention on insulation materials.

Types of insulation materials used in insulation construction include rigid urethane polyisocyanurate foam (PIR), phenolic foam (PF), expanded polystyrene, compressed styrofoam, glass wool manufactured by fiberizing molten glass, and minerals. Wool, cellulose, etc.

Polyurethane-based insulation not only has excellent insulation properties, but also has flame retardancy, so it has been widely used as composite insulation or residential insulation. However, due to the fundamental limitations of organic insulating materials, their fire stability is inevitably weaker than that of inorganic insulating materials such as glass wool and mineral wool. Therefore, it is very important to fundamentally improve the flame retardancy of insulation materials.

Recently, large-scale building fires have been occurring frequently, resulting in significant casualties and property damage. As a result, interest in securing fire safety in buildings is increasing and regulations are being strengthened.

As can be seen from the Icheon refrigerated warehouse fire, large-scale fires in such buildings are caused by the flame-retardant performance of the core material and accessories included in the insulation material (in this case, the concept includes the surface material and core material made of aluminum). When a fire occurs, combustible materials produce flames and a large amount of toxic gases in a short period of time, causing the fire to spread. Accordingly, the standards for flame retardant performance of building finishing materials were revised, and the revised regulations came into effect from December 23, 2021. According to the revised regulations, non-combustible or semi-non-combustible grade insulation materials must be used for interior finishing materials and exterior wall finishing materials of buildings. However, there is a problem with the insulation materials used conventionally not meeting the revised laws and regulations, so there is an urgent need to develop insulation materials that meet the strengthened standards. In addition, in order to achieve quasi-non-flammable performance using only insulation materials, improvements in flame retardant compositions that provide flame retardancy are required.

Public Patent Publication No. 10-2011-0133107 (published on December 12, 2011)

The present invention was brought out to solve the above problems, and provides a polyurethane-based foam composition that can provide semi-incombustible performance to the insulation material itself.

Another object of the present invention is to provide a polyurethane-based foam with quasi-non-flammable performance according to enhanced flame retardant performance evaluation and an insulation material using the same.

The present invention for achieving the above object is (A) a liquid phosphorus-based dispersant, a flame retardant composition comprising 10 to 40 parts by weight of red phosphorus and 5 to 30 parts by weight of aluminum hydroxide based on 100 parts by weight of the liquid phosphorus-based dispersant, (B) a polyol composition, and (C) A polyurethane-based foam composition that may include an isocyanate-based compound can be provided.

In one aspect of the present invention, the liquid phosphorus-based dispersant may be a liquid phosphate-based flame retardant, and the liquid phosphate-based flame retardant may be a trishaloalkyl phosphate and/or a trialkyl phosphate.

In one aspect of the present invention, the polyurethane-based foam composition may include 10 to 40 parts by weight of the flame retardant composition and 50 to 300 parts by weight of the isocyanate-based compound based on 100 parts by weight of the polyol composition. can do.

In one embodiment, the polyol composition may be a polyurethane-based foaming composition containing polyol, a catalyst, a blowing agent, and a bromine-based reactive flame retardant.

In one embodiment, the foaming agent may be any one or more selected from the group consisting of chemical foaming agents, water, and physical foaming agents, thereby providing a polyurethane-based foaming composition.

In one embodiment, the polyol composition may be a polyurethane-based foam composition containing 5 to 30 parts by weight of a bromine-based reactive flame retardant based on 100 parts by weight of polyol.

In one embodiment, the polyol composition may further include one or more from the group consisting of a catalyst, a liquid phosphorus-based flame retardant, a foam stabilizer, and a blowing agent.

In one embodiment, the isocyanate-based compound may be a polyurethane-based foam composition having a viscosity of 100 cp to 1000 cp.

As one embodiment, the present invention may provide a semi-incombustible polyurethane-based foam obtained from the polyurethane-based foam composition.

As an embodiment, the flame-retardant polyurethane foam has semi-non-combustible performance with a total heat release of 8MJ/m ² or less and a thickness shrinkage of less than 20%, as measured by the cone calorimeter test method of KS F ISO 5660-1. It could be.

In this embodiment, the flame-retardant polyurethane foam satisfies the above-mentioned physical properties and at the same time has excellent flame retardancy in the gas toxicity test (KS F 2271), with a mouse behavioral stopping time of 9 minutes or more, preferably 10 minutes or more, and most preferably 11 minutes or more. It can be granted.

As one embodiment, the present invention may provide a semi-incombustible insulation material including a semi-incombustible polyurethane-based foam.

In addition, as one embodiment, the present invention can provide a method for producing a semi-incombustible polyurethane-based foam, which includes manufacturing a polyurethane-based foam composition in a wooden mold on a double conveyor.

The polyurethane-based foam composition according to the present invention, the polyurethane-based foam manufactured using the same, and the insulation material containing the polyurethane-based foam have semi-non-combustible performance, so they can not only prevent the spread of fire, but also suppress the amount of fire harmful gases generated. You can.

The following specific examples or examples are only a reference for explaining the present invention in detail, but the present invention is not limited thereto, and may be implemented in various forms.

Unless otherwise defined in the present invention, all technical and scientific terms have meanings commonly understood by those skilled in the art to which this invention pertains. The terminology used in the description of the invention is merely to effectively describe specific embodiments and is not intended to limit the invention.

Additionally, as used in the specification, the singular forms are intended to include the plural forms as well, unless the context clearly dictates otherwise.

Additionally, when a part is said to “include” a certain component, this does not mean excluding other components, but may include other components, unless specifically stated to the contrary.

Hereinafter, units used without special mention are based on weight, and for example, units of % or ratio mean weight% or weight ratio.

Additionally, when describing the components of the present invention, terms such as first, second, (A), (B), (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the component is not limited by the term.

Additionally, as used herein in the specification, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly dictates otherwise.

“Insulating material” used in the present invention means included between aluminum surface materials, and the insulating material of the present invention has the same meaning as the core material.

Hereinafter, the polyurethane-based foam composition of the present invention and the flame-retardant polyurethane-based foam obtained therefrom will be described in detail.

1) Flame retardant composition

In one embodiment, the flame retardant composition may include a liquid phosphorus-based dispersant, red phosphorus, and aluminum hydroxide.

As one embodiment, the flame retardant composition may include 10 to 40 parts by weight of red phosphorus and 5 to 30 parts by weight of aluminum hydroxide based on 100 parts by weight of the liquid phosphorus-based dispersant.

As an embodiment, the liquid phosphorus-based dispersant may use a liquid phosphate-based flame retardant, and the use of the liquid phosphate-based flame retardant is more preferred because it can also ensure storage stability.

The liquid phosphorus-based flame retardant is not particularly limited as long as it is a liquid phosphate-based flame retardant, but may be, for example, trihaloalkyl phosphate and/or trialkyl phosphate, and for example, tri (chloroisopropyl) phosphate (TCPP) and /Or it may be triethyl phosphate (TEP), but is not necessarily limited thereto.

The red phosphorus is included in the polyurethane-based foam composition and is better for suppressing the heat generation amount when the foam is burned. In terms of foam stability and ease of handling, it is better to use melamine-coated red phosphorus or moisture-containing red phosphorus. is preferred

The content of red phosphorus is not limited in achieving the purpose of the present invention, but for example, 10 to 40 parts by weight can be used, preferably 20 to 40 parts by weight, based on 100 parts by weight of the liquid phosphorus-based dispersant. , the above usage amount is preferred because it is better for suppressing heat generation during combustion, but is not necessarily limited to this. In addition, the amount of red phosphorus used can be effective in suppressing the amount of heat released by adjusting the content depending on the density of the foaming agent used.

The aluminum hydroxide is included together with the red phosphorus to reduce gas generation and improve the storage stability of the flame retardant composition. In addition, when aluminum hydroxide surface-treated with silanol or silicon-based compounds is used together with red phosphorus, it is better to disperse into a liquid phase and remain stably in a liquid phase without agglomerating. In addition, the use of the surface-treated aluminum hydroxide is even better because even if it aggregates, it is easily dispersed when redispersed.

The content of aluminum hydroxide is not limited in achieving the purpose of the present invention, but for example, 5 to 30 parts by weight can be used, more preferably 10 to 30 parts by weight, based on 100 parts by weight of the liquid phosphorus-based dispersant. , it is more preferable to use 10 to 25 parts by weight, and in the case of the above usage amount, it is more effective in reducing the amount of gas generated and improving the storage stability of the flame retardant composition, but is not necessarily limited to this.

2) Polyol composition

The polyol composition may include, for example, a polyol, a catalyst, a blowing agent, and a reactive brominated flame retardant.

Additionally, the polyol composition may further include a liquid phosphorus-based flame retardant, a surfactant, and a gelling or trimerization catalyst.

In one embodiment, the polyol composition includes 5 to 30 parts by weight of a bromine-based reactive flame retardant, 1.5 to 2.5 parts by weight of a foaming catalyst, 12 to 15 parts by weight of a physical blowing agent, and 1.5 to 3 parts by weight of a silicone-based surfactant, based on 100 parts by weight of the polyol. It may have happened.

An example of the polyol may be, but is not limited to, polyester polyol used in rigid polyurethane/polyisocyanurate foam, which is preferred in that it can increase the flame retardancy and heat resistance of the composition, but is not limited thereto. no. For example, the polyester polyol may be phthalic anhydride-based or terephthalic-acid-based aromatic polyester polyol, but is not limited thereto.

As a specific example of the polyester polyol, one made from aromatic dicarboxylic acid and polyhydric alcohol and having a hydroxyl value of 150 to 300 can be used. Using the polyester polyol having the hydroxyl range can provide semi-incombustibility to the foam, suppress the amount of toxic gases generated, and control the vertical axial strength and bending strength of the rigid polyurethane-based foam. It is preferred, but not necessarily limited to this.

The aromatic dicarboxylic acid may be one or more selected from the group consisting of terephthalic acid, dimethyl terephthalate (DMT), phthalic anhydride (Pan), and isophthalic acid.

The polyhydric alcohol includes ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, glycerine, trimethanolpropane, and pentaerythol ( One or more selected from the group consisting of pentaerythriol, dipentaerythriol, α-methylglucoside, xylitol, and sorbitol may be used.

Foaming catalysts included in the polyol composition include, for example, triethylamine, N-methylmorpholine bis(2-dimethylaminoethyl)ether, N,N,N',N",N"-pentamethyldiethylene triethylene. Amine, N,N,N'-trimethylamino ethyl ethanol amine, and/or bis(2-dimethylaminoethyl)ether may be used, and any one of the above catalysts may be used in consideration of reactivity with components included in the polyol composition. In addition to the above, potassium octoate (K-15) diluted in diethylene glycol can be used as a trimerization catalyst.

The foaming agent may be a physical or chemical foaming agent.

A physical foaming agent with a low boiling point is vaporized and foamed by the heat of reaction generated when polyol and isocyanate react to form polyurethane.

On the other hand, water is generally used as a chemical foaming agent. When water reacts with polyurethane, CO ₂ is generated through a chemical exothermic reaction with isocyanate, and the generated CO ₂ causes foaming.

When water is used as a chemical blowing agent, polyurethane is produced and foamed through the following reaction mechanism.

R-NCO+H ₂ O → R-NH-CO-OH → R-NH ₂ + CO ₂

R-NH ₂ + R'- NCO → R- NH-CO-NH-R'

Water molecules and isocyanate react to form unstable carbonic acid, which decomposes into amine and carbon dioxide. The amine reacts again with the excess isocyanate to form a urea bond, carbon dioxide forms new bubbles within the resin, and the continuously generated gas grows existing bubbles and creates new bubbles at the same time.

Physical foaming agents are more preferred from the viewpoint of maintaining the flame retardancy and heat resistance of the foam. The physical blowing agents used in the present invention include HCFC-141b (1,1-dichloro-1-fluoroethane, CAS No. 1717-00-6), a hydrochlorofluorocarbon type, and HFC-365mfc (CH3CF2CH2CF3, CAS No. 1717-00-6), a hydrofluorocarbon type. 406-58-6), HCFC-245fa (CHF2CH2CF3, CAS No.460-73-1), and/or hydrocarbons (cyclo-, iso-, or normal-)pentane can be used. From an eco-friendly perspective, it is recommended to use C-Pantane, but it is not limited to this.

The surfactant that can be added to the polyol composition is not particularly limited, but for example, a silicone-based surfactant (product name B-8462, Evonik) can be used. In addition, the surfactant can perform functions such as stabilizing the mixing of reaction materials, generating bubbles, and stabilizing bubbles. For example, the surface area can be increased by reducing the surface tension and reducing the size of the cells, and the foam stability can be increased by increasing the surface elasticity, allowing the critical expansion of the film to recover before cell failure occurs. It acts as a foaming agent that can increase surface viscosity, reducing deformation of cell structure. The surfactant may be included in an amount of 1.5 to 3 parts by weight based on 100 parts by weight of polyol.

The reactive brominated flame retardant included in the polyol composition is chemically bonded and included in the polyurethane-based foam through a reaction between the functional group in the flame retardant and the isocyanate group (-NCO) of the isocyanate-based compound, resulting in a blooming phenomenon in which the flame retardant leaks out. There is no flame retardant effect, and the flame retardant effect can be maintained continuously. Br in the reactive bro-based flame retardant can increase the flame retardant effect by interacting with the liquid phosphorus-based dispersant included in the flame retardant composition.

Tetrabromophthalate diol (CAS No. 77098-07-8) and tetrabromobisphenol A may be used as the reactive brominated flame retardant, but are not limited thereto.

3) Isocyanate-based compounds

In one embodiment, the isocyanate-based compound may be an aromatic isocyanate-based compound used in rigid polyurethane/polyisocyanurate foam, but is not necessarily limited thereto.

Examples of the aromatic isocyanate-based compounds include toluene diisocyanate, tolylene diisocyanate, methylenediphenyldiisocyanate, tetramethylxylenediisocyanate, naphthalenediisocyanate, xylene diisocyanate, polymethylenepolyphenylisocyanate, hydrogenated methylenediphenyldiisocyanate, It may be hydrogenated tolylene diisocyanate, polymeric methylenediphenyl diisocyanate with an isocyanate content of 25 to 50%, and mixtures thereof, but there is no limitation to achieving the above purpose. From the viewpoint of forming a rigid polyurethane-based foam, it is preferable to use an isocyanate-based compound with a viscosity of 100 to 1000 cp, but it is not limited thereto.

4) Other additives

The polyurethane foam of the present invention may further include filler.

The filler includes granular fillers, layered fillers, fibrous fillers, etc. Examples of the filler include granular fillers such as calcium carbonate, barium sulfate, silica, clay, talc, aluminum hydroxide, and melamine, layered fillers such as mica, willastonite, and aluminum, or various glass fibers and carbon. Examples include fibrous fillers such as fiber, alumina fiber, and potassium titanate. Fillers increase the hardness of the foam, improve thermal stability, improve elastic modulus, and are effective in energy absorption.

In addition, additives such as antioxidants, ozone inhibitors, UV stabilizers, and conductive polymers can also be added.

Hereinafter, a method for producing polyurethane foam according to an embodiment of the present invention will be described.

Once the flame retardant composition, polyol composition, and isocyanate-based compound are prepared, each raw material is mixed at a certain mixing ratio. In one embodiment, the semi-non-flammable polyurethane foam is prepared by first mixing 10 to 40 parts by weight of a flame retardant composition with respect to 100 parts by weight of the polyol composition, and adding 140 to 160 parts by weight of the isocyanate-based compound to the mixture with respect to 100 parts by weight of the polyol composition. Mix. When the polyol composition and the flame retardant composition are mixed first, and the isocyanate-based compound is added to react the polyol and the isocyanate-based compound with urethane, the moldability of the urethane foam is superior, and the quality of the foam is uniform, so it is preferred because there is no local unevenness. It is not limited to this.

The polyurethane foam of the present invention according to the above embodiment improves the strength and flame retardancy of the foam, and reduces the amount of gas generated during combustion.

Hereinafter, the method for measuring physical properties of the present invention will be described.

Flame retardancy evaluation of foam

1) Cone calorimeter test method (KS F ISO 5660-1) : Make a sample for cone calorimeter test so that the foam is 100mm (length) x 100mm (width) x 50mm (thickness), and composite in accordance with KS F ISO 5660-1. The flame retardant performance was evaluated as a semi-incombustible material of the polyurethane-based foam of the present invention, which is used as a core material for insulation. The test started at 50 kW/m ² radiant heat, the cone heater temperature was 776°C, the blower speed was 24 L/min, and the oxygen concentration was 20.950% and was conducted for 10 minutes. From this, the total amount of heat released and the maximum heat release rate were confirmed, and the thickness change rate was evaluated by calculating the thickness change of the foam after testing the 50 mm thick foam of the present invention according to the above test method.

2) Gas toxicity test (KS F 2271) : Create a sample for gas toxicity test with foam measuring 1,800mm (length) Experimental white rats were exposed and their behavior was continuously measured for a specified period of time, and the time until the rats decided on their behavior (behavior stopping time) was measured. At this time, heat was generated by applying 220V direct current, 60Hz, 15A current, and propane gas was flowed at a rate of 70L/s.

Hereinafter, the present invention will be described in detail through specific examples.

Example 1

A flame retardant composition was prepared by mixing 100 parts by weight of tri(chloroisopropyl)phosphate (TCPP), a liquid flame retardant dispersant, 40 parts by weight of red phosphorus, and 20 parts by weight of aluminum hydroxide.

10 parts by weight of tetrabromophthalate diol, a reactive brominated flame retardant, and tri(chloroisopropyl), a liquid phosphorus-based flame retardant, per 100 parts by weight of polyester polyol, which is manufactured from terephthalic acid, phthalic anhydride, and diethylene glycol and has a hydroxyl value of 240. 15 parts by weight of phosphate (TCPP), 1.0 parts by weight of water, 2.0 parts by weight of silicone surfactant (B-8462 from Evonik), N, N, N', N", N"-pentamethyl diethylenetriamine as a catalyst, and A polyol composition was prepared by mixing 2.0 parts by weight of potassium octoate (K-15) diluted in diethylene glycol and 13 parts by weight of foaming agent Cyclo-pentane.

100 parts by weight of the polyol composition was added to a 1L mixing tank made of stainless steel equipped with a stirring device capable of high-speed stirring up to 4000 rpm and stirred uniformly at room temperature. Here, with respect to 100 parts by weight of the polyol composition, 30 parts by weight of the flame retardant composition and 150 parts by weight of 25 to 50% polymeric methylenediphenyldicisocyanate, which is an isocyanate compound as a curing agent, are mixed, stirred at a speed of 3,500 rpm for 7 seconds, and then stirred at a speed of 3,500 rpm for 7 seconds. After pouring into the mold and curing at room temperature for 10 minutes, the foam was demolded from the wooden mold to produce polyisocyanate urethane (polyurethane-based) foam. The results are listed in Table 2.

Example 2

Based on 100 parts by weight of polyester polyol with a hydroxyl value of 240, 15 parts by weight of tetrabromophthalate diol, a reactive bromine-based flame retardant, 15 parts by weight of tri(chloroisopropyl)phosphate (TCPP), a liquid phosphorus-based flame retardant, and 1.0 parts by weight of water. , 2.0 parts by weight of a silicone-based surfactant (B-8462 from Evonik), N,N,N',N", N"-pentamethyl diethylenetriamine as a catalyst, and potassium octoate (K -15) was prepared in the same manner as Example 1, except that a polyol composition was prepared by mixing 2.0 parts by weight of Cyclo-pentane and 13 parts by weight of the foaming agent Cyclo-pentane. The results are listed in Table 2.

Example 3

Based on 100 parts by weight of polyester polyol with a hydroxyl value of 240, 20 parts by weight of tetrabromophthalate diol, a reactive brominated flame retardant, 15 parts by weight of tri(chloroisopropyl)phosphate (TCPP), a liquid phosphorus-based flame retardant, and 1.0 parts by weight of water. , 2.0 parts by weight of silicone-based surfactant (B-8462 from Evonik), catalyst N,N,N',N", N"-pentamethyl diethylenetriamine and potassium octoate (K-) diluted in diethylene glycol. 15) was prepared in the same manner as in Example 1, except that a polyol composition was prepared by mixing 2.0 parts by weight of cyclo-pentane and 13 parts by weight of foaming agent Cyclo-pentane. The results are listed in Table 2.

Comparative Example 1

For 100 parts by weight of polyester polyol with a hydroxyl value of 240, 15 parts by weight of tri(chloroisopropyl)phosphate (TCPP), a liquid phosphorus-based flame retardant, 1.0 parts by weight of water, 2.0 parts by weight of silicone-based surfactant (B-8462 from Evonik) , catalyst N,N,N',N", N"-pentamethyl diethylenetriamine, 2.0 parts by weight of potassium octoate (K-15) diluted in diethylene glycol, and 13 parts by weight of foaming agent Cyclo-pentane were mixed. A polyurethane-based foam composition was prepared by mixing 150 parts by weight of polymeric methylenediphenyldicisocyanate, which is 25 to 50% of the isocyanate-based compound, with 100 parts by weight of the prepared polyol composition and stirring at a speed of 3,500 rpm for 7 seconds. The stirred polyurethane-based foam composition was poured into a wooden mold, cured at room temperature for 10 minutes, and then the foam was demolded from the wooden mold to prepare polyisocyanate urethane (polyurethane-based) foam. The results are listed in Table 2.

Comparative Example 2

As shown in Table 1, Comparative Example 1 was conducted in the same manner except that the reactive flame retardant was not used and instead, 40 parts by weight of aluminum hydroxide was further included in the flame retardant composition. The results are listed in Table 2.

Comparative Example 3

As shown in Table 1, Comparative Example 1 was performed in the same manner except that a reactive flame retardant was not used and 40 parts by weight of red phosphorus was added to the flame retardant composition. The results are listed in Table 2.

Table 1

Table 2

Table 2 shows data on the flame retardant effect of polyurethane-based foam according to each Example and Comparative Example.

Semi-non-combustible foam has a total heat release rate of 8MJ/m ² or less according to the cone calorimeter method (KS F ISO 5660-1), the time for the heat release amount to continuously exceed 200 kW/m ² is less than 10 seconds, and There are no cracks or holes harmful to burns, the thickness shrinkage rate is less than 20%, and the gas toxicity test (KS F 2271) is satisfied for more than 9 minutes.

Examples 1 to 3 of the present invention satisfied quasi-non-flammable performance in all items including total heat release amount, heat release amount, thickness shrinkage, and mouse action time. However, in Comparative Example 1, which did not contain a flame retardant, the mouse movement stopping time was very short compared to other cases, and it can be seen that the overall flame retardant performance improved as the flame retardant composition of the present invention and the content of the reactive brominated flame retardant increased. Additionally, in Examples 1 to 3, cracks or holes harmful to fire protection were not observed with the naked eye.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims are also possible. falls within the scope of rights.

Claims (15)

(A) A flame retardant composition comprising 10 to 40 parts by weight of red phosphorus and 10 to 25 parts by weight of silalol surface-treated aluminum hydroxide, based on 100 parts by weight of a liquid phosphate-based flame retardant as a dispersant,
(B) a polyol composition comprising a polyol, a catalyst, a blowing agent, a liquid phosphate-based flame retardant and a reactive brominated flame retardant, and
(C) contains an isocyanate-based compound,
The catalyst included in the polyol composition (B) includes N,N,N′,N″,N″-pentamethyldiethylenetriamine and a trimerization catalyst,
The reactive brominated flame retardant included in the polyol composition (B) is tetrabromophthalate diol,
The liquid phosphate-based flame retardant included in the (A) flame retardant composition and (B) polyol composition is tri(chloroisopropyl)phosphate,
A polyurethane-based foam composition comprising 10 to 40 parts by weight of the (A) flame retardant composition and 50 to 300 parts by weight of the (C) isocyanate-based compound, based on 100 parts by weight of the polyol composition (B).

delete delete delete delete According to paragraph 1,
The foaming agent is a polyurethane-based foaming composition that is a chemical foaming agent or a physical foaming agent. According to paragraph 1,
The polyol composition is a polyurethane-based foam composition containing 5 to 30 parts by weight of a reactive brominated flame retardant based on 100 parts by weight of polyol. According to paragraph 1,
A polyurethane-based foam composition wherein the isocyanate-based compound has a viscosity of 100 cp to 1000 cp. A semi-incombustible polyurethane-based foam obtained from the polyurethane-based foam composition of any one of claims 1 and 6 to 8. According to clause 9,
The semi-incombustible polyurethane-based foam is a semi-incombustible polyurethane-based foam with a total heat release of 8MJ/m2 or less as measured by the cone calorimeter test method of KS F ISO 5660-1.

delete delete According to clause 10,
The semi-incombustible polyurethane-based foam is a semi-incombustible polyurethane-based foam that has a mouse behavioral cessation time of 10 minutes or more in a gas hazard test. A semi-non-combustible insulation material equipped inside with the semi-incombustible polyurethane foam of claim 9. A method for producing a semi-incombustible polyurethane-based foam comprising the step of producing a foam from the polyurethane-based foam composition of any one of claims 1 and 6 to 8 in a wooden mold on a double conveyor.