KR20200070079A - Phenol foam, method of producing the same, and insulating material - Google Patents

Abstract

According to KS F ISO 5660-1, when 50 kW radiant heat is applied to a foam having a size of 100 mm (length)Χ100 mm (width)✓50 mm (thickness) and having a surface area of 10,000 mm 2, the thickness of the foam is 1/2 of the initial thickness. A phenolic foam having a cross-sectional area of 50% to 100% of the surface area is provided.

Description

Phenolic foam, method of manufacturing the same, and insulating material including the same{PHENOL FOAM, METHOD OF PRODUCING THE SAME, AND INSULATING MATERIAL}

The present invention relates to a phenolic foam, a method for manufacturing the same, and a heat insulating material including the same.

Insulation is an essential material to prevent energy loss in buildings. As global warming continues to emphasize the importance of green growth worldwide, insulation is becoming more important to minimize energy loss.

Thermal insulation materials include thermosetting foam insulation, EPS (expanded polystyrene foam) insulation, XPS (extruded polystyrene foam) insulation, and vacuum insulation materials. Among them, thermosetting foam insulation materials are widely used because they have the best insulation properties, excluding vacuum insulation materials among existing materials. However, due to the fundamental limitations of organic matter, fire stability is inevitably weaker than inorganic insulating materials.

In addition, since thermosetting foams such as urethane foams and phenolic foams are manufactured by including surface materials in the manufacturing process, it is possible to improve the flame retardancy by applying aluminum surface materials, but in extreme situations such as fire, the flame resistance of the surface materials is large. It is very important to always keep the flame retardancy of the foam fundamentally because it falls off.

Thus, in general, a flame retardant is improved by including a flame retardant such as phosphate in the foamable composition, but the flame retardancy and heat insulation have a trade-off, and there is a problem that the heat insulation is deteriorated.

An object of the present invention is to provide a phenolic foam that satisfies both high thermal insulation and high flame retardancy at the same time, and prevents the foam from being easily dislodged and the fire spreading as the foam burns and disappears during a fire.

It is also an object of the present invention to provide a method for preparing the phenolic foam.

It is also an object of the present invention to provide a heat insulating material comprising a phenolic foam that satisfies the high thermal insulation and high flame retardancy at the same time, and prevents the foam from being easily dislodged and the fire spreading as the foam burns and disappears during a fire.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned can be understood by the following description, and will be more clearly understood by embodiments of the present invention. In addition, it will be readily appreciated that the objects and advantages of the present invention can be realized by means of the appended claims and combinations thereof.

When 50 kW radiant heat is applied to a foam having a size of 100 mm (length)Χ100 mm (width)✓50 mm (thickness) and having a surface area of 10,000 의하여 according to KS F ISO 5660-1 according to the present invention, the initial thickness of the foam The cross-sectional area of the 1/2 point of may provide a phenolic foam having 50% to 100% of the surface area.

In addition, preparing a flame retardant composition comprising a subject, a curing agent, a blowing agent and a first flame retardant comprising a phenolic resin according to the present invention; Preparing a foam composition by stirring the subject, a curing agent, a foaming agent, and a flame retardant composition; And foaming the foam composition; wherein the first flame retardant is phosphorus and has a size of 100mm (length)Χ100mm (width)✓50mm (thickness) by KS F ISO 5660-1, When 50 kW radiant heat is applied to a foam having a surface area of 10,000 mm 2 for 10 minutes, the cross-sectional area of 1/2 of the initial thickness of the foam may provide a method for producing a phenolic foam having 50% to 95% of the surface area.

In addition, it is possible to provide an insulating material comprising the phenolic foam according to the present invention.

The phenolic foam according to the present invention satisfies both high thermal insulation and high flame retardancy at the same time, and when the fire burns, the foam burns and cracks occur, and as the hole is formed, the foam can easily fall out and prevent the fire from spreading, and excellent compressive strength. And dimensional stability.

In addition, the method for producing a phenolic foam in the present invention can provide a method for producing the phenolic foam having the above properties.

In addition, the heat insulating material according to the present invention has improved flame retardancy and excellent heat insulation properties, and when a fire occurs, the foam burns and cracks, and as the hole is formed, the foam can easily fall off and prevent the fire from spreading, and excellent compressive strength and It can exhibit physical properties such as dimensional stability.

In addition to the above-described effects, the concrete effects of the present invention will be described together while describing the specific matters for carrying out the invention.

FIG. 1 is a side view when 50 kW radiant heat is applied to a conventional phenolic foam having a size of 100 mm (length)✓100 mm (width)✓50 mm (thickness) according to KS F ISO 5660-1 and having a surface area of 10,000 ㎟ for 10 minutes. It is a schematic diagram.
2 is 50 kW radiant heat to a foam having a size of 100 mm (length)✓100 mm (width)✓50 mm (thickness) according to KS F ISO 5660-1 on a phenolic foam according to an embodiment of the present invention, and having a surface area of 10,000 mm 2 It is a schematic view of the side when applied for 10 minutes.

The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, and accordingly, a person skilled in the art to which the present invention pertains can easily implement the technical spirit of the present invention. In the description of the present invention, when it is determined that detailed descriptions of known technologies related to the present invention may unnecessarily obscure the subject matter of the present invention, detailed descriptions will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings are used to indicate the same or similar components.

In the following, the arrangement of any component in the "upper (or lower)" or "upper (or lower)" of the component means that the arbitrary component is disposed in contact with the upper surface (or lower surface) of the component. In addition, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

Hereinafter, a phenolic foam according to some embodiments of the present invention will be described.

According to an embodiment of the present invention, when 50 kW radiant heat is applied to a foam having a size of 100 mm (length)✓100 mm (width)✓50 mm (thickness) according to KS F ISO 5660-1 and having a surface area of 10,000 mm 3, the above The cross-sectional area at half the initial thickness of the foam provides a phenolic foam having 50% to 100% of the surface area.

Due to various fire accidents that have recently occurred, not only excellent thermal insulation properties but also improved flame retardancy are required for thermal insulation materials essential for buildings. However, due to the fundamental limitations of organic materials, thermosetting foams are inevitably weaker in fire stability than inorganic insulating materials. Thus, it is common to impart flame retardancy to the foam through surface treatment such as aluminum face material, but there is a fear that the face material may fall off from the actual fire, and if the face material falls off, the probability of fire spreading increases.

The phenolic foam includes a phenolic resin, a curing agent, a foaming agent, and a first flame retardant, as described below, and the first flame retardant is phosphorus, which is 100 mm (length)✓100 mm (in accordance with KS F ISO 5660-1) Width) When 50 kW radiant heat is applied to a foam having a size of 50 mm (thickness) and having a surface area of 10,000 mm 2 for 10 minutes, the cross-sectional area of 1/2 of the initial thickness of the foam has 50% to 100% of the surface area. . The phenolic foam has a surface area in the above range, and thus can exhibit flame resistance or excellent resistance to diffusion and structural stability during combustion. Accordingly, it is possible to prevent the foam from easily falling off during the fire and spreading the fire.

A crack is formed in the cross-section, and a maximum length in a width direction perpendicular to the longitudinal direction of the crack may be about 15 mm or less. For example, it may be about 1 mm to about 15 mm or about 1 mm to about 10 mm.

A plurality of cracks may be formed on the cross-section, and the maximum length of each of the plurality of cracks in the width direction perpendicular to the longitudinal direction may be 15 mm or less. The length means the value measured in the cross section. Crack means that the foam is formed by cracking the surface due to shrinkage due to heat and combustion. When the carbonized film is formed, it appears prominently and has a large amount of burning and extinction, which means a shape different from piping.

And, the phenolic foam is applied to the foam having a size of 100mm (length)Χ100mm (width)Χ50mm (thickness) according to KS F ISO 5660-1 for 10 minutes, 5 mm from the bottom surface of the foam Cracks, grooves, or holes may not be formed in the thickness of 20 mm. For example, cracks, grooves, or holes may not be formed in a thickness of about 5 mm to about 25 mm.

In addition, it is possible to impart flame retardancy using a phosphorus-based flame retardant such as phosphate to the thermosetting foam, but when using a phosphorus-based flame retardant such as phosphate, the flame retardancy is improved, while the foam cell is destroyed during the foaming process, resulting in deterioration in the ductility. There is. In addition, when aluminum hydroxide (ATH) is used as a flame retardant in the thermosetting foam, the aluminum hydroxide is a basic material, which neutralizes an acid curing agent, so that reactivity such as curing reaction of a phenolic resin may be deteriorated. Accordingly, there is a problem that the heat insulating properties of the foam produced therefrom are lowered.

The phenolic foam may include a phenolic resin, a curing agent, a blowing agent, and a first flame retardant, and the first flame retardant may be phosphorus.

Specifically, the phenolic foam contains a phenolic resin. The phenol-based resin may be obtained by reacting phenol and formaldehyde, and may include, for example, a resol-based phenol resin (hereinafter, “resol resin”).

The phenolic resin may be included in the phenolic foam in an amount of about 30% to about 90% by weight or about 50% to about 90% by weight or about 55% to about 90% by weight. The phenolic foam can stably form a small sized foam cell by including the phenolic resin in an amount within the above range, and realize excellent thermal conductivity.

The phenolic foam contains a curing agent. The curing agent may include one acid curing agent selected from the group consisting of toluene sulfonic acid, xylene sulfonic acid, benzene sulfonic acid, phenol sulfonic acid, ethylbenzene sulfonic acid, styrene sulfonic acid, naphthalene sulfonic acid, and combinations thereof. The phenolic foam may exhibit appropriate crosslinking, curing and foaming properties, including the curing agent.

The phenolic foam may contain a blowing agent. For example, the blowing agent may include an aliphatic hydrocarbon having 1 to 8 carbon atoms, and may include one selected from the group consisting of hydrofluoroolefin (HFO)-based compounds, hydrocarbon-based compounds, and combinations thereof. . Specifically, the hydrofluoroolefin-based compound is, for example, monochlorotrifluoropropene, trifluoropropene, tetrafluoropropene, pentafluoropropene, hexafluorobutene, and combinations thereof. It may include at least one selected from the group consisting of. Further, the hydrocarbon-based compound may include 1 to 8 carbon atoms. For example, the hydrocarbon-based compound is dichloroethane, propyl chloride, isopropyl chloride, butyl chloride, isobutyl chloride, pentyl chloride, isopentyl chloride, n-butane, isobutane, n-pentane, isopentane, cyclopentane, It may include at least one selected from the group consisting of hexane, heptane, cyclopentane and combinations thereof.

The phenolic foam may include a surfactant selected from the group consisting of amphoteric, cationic, anionic, nonionic surfactants and combinations thereof. For example, the phenolic foam may include castor oil surfactant (eg, LG H&H, ELOTANT COE 131) that is ethoxylated, that is, a nonionic surfactant.

The phenolic foam can easily disperse components such as a complex flame retardant, including the surfactant, and stably form an appropriate foaming structure on the phenolic foam, thereby realizing excellent thermal conductivity and excellent physical strength.

The phenolic foam may include a phosphorous first flame retardant. The phosphorus can be divided into white, red, black, and white, depending on the structural state and color of the phosphorus. Specifically, the phenolic foam may contain red. The phenolic foam may be easily handled when forming a phenolic foam, including an enemy having an appropriate structure. In addition, the phenolic foam may have a better flame retardancy and thermal insulation at the same time by controlling the rate of char formation during combustion of the phenolic foam, including the enemy. For example, the phenolic foam may contain 80% or more or 100% of the phosphorus enemy.

The phenolic foam may include only the first flame retardant, and the first flame retardant may include 1 to 15 parts by weight compared to 100 parts by weight of the phenolic foam. For example, it may include about 1 part to about 12 parts by weight, about 1 part to about 10 parts by weight, or about 3 parts to about 8 parts by weight.

The phenolic foam further comprises a second flame retardant, a composite flame retardant comprising the first flame retardant and the second flame retardant, and the second flame retardant is a pentaerythritol-based compound, melamine cyanurate, trialkylphosphate, and It may include one selected from the group consisting of these combinations.

The composite flame retardant may be included in an amount of 1.5 to 20 parts by weight compared to 100 parts by weight of the phenolic foam. For example, the composite flame retardant is 1.5 parts by weight to 17 parts by weight, 1.5 parts by weight to 15 parts by weight, about 2 parts by weight to about 15 parts by weight, about 3 parts by weight to about 12 parts by weight, or about 5 parts by weight to It may be included in a content of about 10 parts by weight.

The phenolic foam may include the composite flame retardant, and the first flame retardant may be included in an amount of 1 to 15 parts by weight compared to 100 parts by weight of the phenolic foam. For example, the first flame retardant may include about 1 part by weight to about 12 parts by weight, about 1 part by weight to about 10 parts by weight, or about 3 parts by weight to about 8 parts by weight relative to 100 parts by weight of the phenolic foam.

The composite flame retardant may include a second flame retardant, and the second flame retardant may include one selected from the group consisting of pentaerythritol-based compounds, melamine cyanurate, trialkyl phosphate, and combinations thereof.

In this case, the trialkyl phosphate is trimethyl phosphate, triethyl phosphate, tributyl phosphate, tris (1-chloro 2-propyl) phosphate, tri (2-ethylhexyl) phosphate, triphenyl phosphate, tricresyl phosphate, triza Trienylenyl phosphate, tris(isopropylphenyl)phosphate, tris(phenylphenyl)phosphate, trinaphthylphosphate, cresyldiphenylphosphate, xylenyldiphenylphosphate, diphenyl(2-ethylhexyl)phosphate, di (Isopropylphenyl)phenylphosphate, monoisodecylphosphate) and combinations thereof. The trialkyl phosphate may be triethyl phosphate.

In addition, the second flame retardant may be included in an amount of 0.5 to 7 parts by weight compared to 100 parts by weight of the phenolic foam. For example, the second flame retardant may be about 1 part by weight to about 6 parts by weight, or about 2 parts by weight to about 5 parts by weight relative to 100 parts by weight of the phenolic foam.

The weight ratio of the first flame retardant to the second flame retardant may be 1: 0.1 to 1: 1.2. For example, the weight ratio of the first flame retardant to the second flame retardant may be about 1: 0.1 to about 1: 1.0, about 1: 0.3 to about 1: 0.8, or about 1: 0.4 to about 1: 0.7.

The composite flame retardant includes a phosphorus and pentaerythritol-based compound, and the weight ratio of the phosphorus to the pentaerythritol-based compound may be 1: 0.05 to 1: 0.6. For example, the weight ratio of the phosphorus to the pentaerythritol-based compound may be about 1: 0.07 to about 1: 0.4, or about 1: 0.1 to about 1: 0.3.

The composite flame retardant includes a phosphorus and melamine cyanurate compound, and the weight ratio of the phosphorus to the melamine cyanurate compound may be about 1: 0.05 to about 1: 0.8. For example, the weight ratio of the phosphorus to the melamine cyanurate compound may be about 1: 0.08 to about 1: 0.6, or about 1: 0.1 to about 1: 0.4.

The composite flame retardant may include phosphorus and trialkyl phosphate, and the weight ratio of the phosphorus to the trialkyl phosphate may be about 1: 0.1 to about 1: 0.7. For example, the weight ratio of the phosphorus to the trialkylphosphate may be about 1:0.15 to about 1:0.5, or about 1:0.2 to about 1:0.4.

The composite flame retardant includes phosphorus, pentaerythritol-based compound, and melamine cyanurate, and the weight ratio of the pentaerythritol-based compound: melamine cyanurate relative to 100 parts by weight of the phosphorus is about 1:1 to about 20:80 Can be For example, compared to 100 parts by weight of the phosphorus, the weight ratio of the pentaerythritol-based compound: melamine cyanurate may be about 2: 5 to about 15: 50 or about 3: 10 to 10: 30.

The composite flame retardant may include phosphorus, melamine cyanurate, and trialkyl phosphate, and the weight ratio of the melamine cyanurate: trialkyl phosphate to 100 parts by weight of phosphorus may be about 1:1 to 80:80. For example, compared to 100 parts by weight of the phosphorus, the weight ratio of the melamine cyanurate: trialkyl phosphate may be about 7: 15 to about 45: 60 or about 10: 20 to about 25: 40.

The composite flame retardant includes phosphorus, pentaerythritol-based compound and trialkyl phosphate, compared to 100 parts by weight of the phosphorus, the weight ratio of the pentaerythritol-based compound: trialkyl phosphate may be from about 1: 1 to about 50: 80 have. For example, compared to 100 parts by weight of the phosphorus, the weight ratio of the pentaerythritol-based compound: trialkyl phosphate may be about 7: 15 to about 40: 60 or about 10: 10 to about 20: 40.

The composite flame retardant includes phosphorus, pentaerythritol-based compound, melamine cyanurate and trialkyl phosphate, compared to 100 parts by weight of the phosphorus, the pentaerythritol-based compound: melamine cyanurate: trialkyl phosphate weight ratio is about It may be 1: 1:1 to about 15:50:60. For example, compared to 100 parts by weight of the phosphorus, the weight ratio of the pentaerythritol-based compound: melamine cyanurate: trialkyl phosphate is about 1: 3: 10 to 15: 25: 50 or about 3: 8: 15 to 10 : 20: 40.

The phenolic resin, a curing agent, a blowing agent, and a first flame retardant, wherein the first flame retardant is Phosphorus, the phenolic foam has a thermal conductivity of 0.016 W/m·K measured at an average temperature of 20° C. according to KS L 9016. To 0.029 W/m·K. For example, the phenolic foam has a thermal conductivity of about 0.016 W/m·K to about 0.025 W/m·K, about 0.016 W/m·K to about 0.023 W/ measured at an average temperature of 20° C. according to KS L 9016. m·K, about 0.016 W/m·K to about 0.021 W/m·K or about 0.016 W/m·K or more, and less than about 0.020 W/m·K.

And, the phenolic foam was dried at 70° C. for 7 days and then at 110° C. for 14 days according to EN13823, and the thermal conductivity measured at an average temperature of 20° C. was about 0.017 W/m·K to about 0.029 W/ It can be m·K. For example, it may be about 0.017 W/m·K to about 0.025 W/m·K or about 0.017 W/m·K or more, and about 0.023 W/m·K.

At the same time, the phenolic foam may have a total heat emission rate (THR600s) of about 10 MJ/m 2 to about 12 MJ/m 2 by a concalimeter according to KS F ISO 5660-1. For example, it may be about 3.0 MJ/m 2 to about 10.0 MJ/m 2 or 4.0 MJ/m 2 to about 8.0 MJ/m 2.

In addition, the independent bubble rate of the phenolic foam may be 70% to 98%. For example, the independent bubble rate of the phenolic foam may be about 80% to about 95% or about 85% to about 93%.

Further, the phenolic foam may have a compressive strength according to KS M ISO 845 of about 120 kPa to about 300 kPa. For example, it may be about 150 kPa to about 230 kPa.

The phenolic foam has a maximum load until the specimen is judged at 200 mm support spacing and a load concentration rate of 50 mm/min in a specimen having a size of 250 mm (L)Χ100 mm (W) and 20 mm (T) according to KS M ISO 4898 ( N), the flexural breaking load (N) may be from about 15 N to about 50 N. For example, it may be about 20 N to about 40 N.

And, the phenolic foam may have an average value of the dimensional change rate by the following formula 1 is 0% to 1.0%. For example, the phenolic foam can have an average rate of dimensional change from about 0% to about 0.8% or from about 0% to about 0.6%.

[Equation 1]

Dimensional change rate (%)=(Initial length(a)-Last length(a'))/Initial length(a) X 100

In Equation 1, the initial length (a) is the length of each line of n points equal in the length (L) and width (W) directions of the phenolic foam, and the later length (a') is the phenolic foam. It means the later length (a') of each line at the above point after being left in an oven at 70°C for 48 hours. At this time, n may be 2 to 5.

The phenolic foam contains the flame retardant and has a rate of dimensional change within the above range, indicating that it has excellent dimensional stability. Accordingly, the phenolic foam exhibits excellent thermal conductivity, so that long-term thermal insulation can be more effectively improved, and workability and workability can be further improved when applied to a predetermined product.

In addition, the phenolic foam may exhibit excellent flame retardancy with an oxygen index of about 32% or more according to KS M ISO 4589-2.

Another embodiment of the present invention comprises the steps of preparing a flame retardant composition comprising a subject, a curing agent, a blowing agent and a first flame retardant comprising a phenolic resin; Preparing a foam composition by stirring the subject, a curing agent, a foaming agent, and a flame retardant composition; And foaming the foam composition; wherein the first flame retardant is phosphorus and has a size of 100mm (length)Χ100mm (width)✓50mm (thickness) by KS F ISO 5660-1, When 50 kW radiant heat is applied to a foam having a surface area of 10,000 mm 2 for 10 minutes, the cross-sectional area at a point 1/2 of the initial thickness of the foam provides a method for producing a phenolic foam having 50% to 95% of the surface area.

As described above by the above-described manufacturing method, it has improved flame retardancy and excellent heat insulation properties, and when a fire occurs, the foam burns to generate cracks, and as the hole is formed, the foam falls off and prevents the fire from spreading, and excellent compression. The phenolic foam having physical properties such as strength and dimensional stability can be prepared.

At 20°C, the difference in viscosity (ΔV=|V1-V2|) between the viscosity (V1) of the phenolic resin and the viscosity (V2) of the flame retardant composition may be about 30,000 cps or less or about 20,000 cps or less. It may be between about 0 and about 10,000 cps.

Another embodiment of the present invention provides a heat insulating material comprising the phenolic foam.

The phenolic foam can be applied, for example, to the use of a building insulation material, and accordingly can simultaneously satisfy a remarkably improved flame retardancy along with excellent heat insulation required as a building insulation material. And, it can have excellent compressive strength, dimensional stability, and high oxygen index.

The building insulation material may further include, for example, a face material on one side or both sides of the phenolic foam, and further include aluminum as the face material to further improve flame retardancy.

As described above, the present invention has been described, but the present invention is not limited by the contents disclosed herein, and it is obvious that various modifications can be made by those skilled in the art within the scope of the technical idea of the present invention. In addition, although the operation and effect according to the configuration of the present invention has not been explicitly described while explaining the embodiment of the present invention, it is natural that the effect predictable by the configuration should also be recognized.

Claims (32)

According to KS F ISO 5660-1, when 50 kW radiant heat is applied to a foam having a size of 100 mm (length)Χ100 mm (width)✓50 mm (thickness) and having a surface area of 10,000 mm 2, the thickness of the foam is 1/2 of the initial thickness. The cross-sectional area of the spot has 50% to 100% of the surface area
Phenolic foam.
According to claim 1,
Cracks are formed in the cross section,
The maximum length in the width direction perpendicular to the longitudinal direction of the crack is 15 mm or less
Phenolic foam.
According to claim 1,
When 50 kW radiant heat is applied to a foam having a size of 100 mm (length)Χ100 mm (width)✓50 mm (thickness) according to KS F ISO 5660-1 for 10 minutes, cracks are formed at a thickness of 5 mm to 20 mm from the bottom surface of the foam. , Grooves or holes are not formed
Phenolic foam.
According to claim 1,
The phenolic foam comprises a phenolic resin, a curing agent, a blowing agent and a first flame retardant,
The first flame retardant is Phosphorus
Phenolic foam.
The method of claim 4,
The phosphorus containing the enemy
Phenolic foam.
The method of claim 4,
Further comprising a second flame retardant, the first flame retardant and a composite flame retardant comprising the second flame retardant,
The second flame retardant comprises one selected from the group consisting of pentaerythritol-based compounds, melamine cyanurate, trialkyl phosphates, and combinations thereof.
Phenolic foam.
The method of claim 4,
The blowing agent comprises an aliphatic hydrocarbon having 1 to 8 carbon atoms
Phenolic foam.
The method of claim 4,
The blowing agent is butane, isobutane, pentane, isopentane, hexane, heptane, cyclopentane, monochlorotrifluoropropene, trifluoropropene, tetrafluoropropene, pentafluoropropene, hexafluorobutene And a combination selected from the group consisting of
Phenolic foam.
The method of claim 4,
The phenolic foam contains only the first flame retardant,
The first flame retardant comprises 1 part by weight to 15 parts by weight relative to 100 parts by weight of the phenolic foam
Phenolic foam.
The method of claim 6,
The composite flame retardant comprises a content of 1.5 to 20 parts by weight compared to 100 parts by weight of the phenolic foam
Phenolic foam.
The method of claim 6,
The phenolic foam comprises the composite flame retardant,
The first flame retardant comprises 1 part by weight to 15 parts by weight relative to 100 parts by weight of the phenolic foam
Phenolic foam.
The method of claim 6,
The trialkyl phosphate is trimethyl phosphate, triethyl phosphate, tributyl phosphate, tris (1-chloro 2-propyl) phosphate, tri (2-ethylhexyl) phosphate, triphenyl phosphate, tricresyl phosphate, tri xylenyl Phosphate (trixylenyl phosphate), tris (isopropylphenyl) phosphate, tris (phenylphenyl) phosphate, trinaphthyl phosphate, cresyl diphenyl phosphate, xylenyl diphenyl phosphate, diphenyl (2-ethylhexyl) phosphate, di (iso Propylphenyl)phenylphosphate, monoisodecylphosphate) and combinations thereof.
Phenolic foam.
The method of claim 6,
The trialkyl phosphate is triethyl phosphate
Phenolic foam.
The method of claim 6,
The second flame retardant comprises 0.5 parts by weight to 7 parts by weight relative to 100 parts by weight of the phenolic foam
Phenolic foam.
The method of claim 6,
The weight ratio of the first flame retardant to the second flame retardant is 1: 0.1 to 1: 1.2
Phenolic foam.
The method of claim 6,
The composite flame retardant includes phosphorus and pentaerythritol-based compounds,
The weight ratio of the phosphorus to the pentaerythritol-based compound is 1: 0.05 to 1: 0.6
Phenolic foam.
The method of claim 6,
The composite flame retardant includes phosphorus and melamine cyanurate compounds,
The weight ratio of the phosphorus to the melamine cyanurate compound is 1: 0.05 to 1: 0.8
Phenolic foam.
The method of claim 6,
The composite flame retardant includes phosphorus and trialkyl phosphate,
The weight ratio of the phosphorus to the trialkyl phosphate is 1: 0.1 to 1: 0.7
Phenolic foam.
The method of claim 6,
The composite flame retardant includes phosphorus, pentaerythritol-based compound and melamine cyanurate,
Compared to 100 parts by weight of the phosphorus, the weight ratio of the pentaerythritol-based compound: melamine cyanurate is 1:1 to 20:80
Phenolic foam.
The method of claim 6,
The composite flame retardant includes phosphorus, melamine cyanurate and trialkyl phosphate,
Compared to 100 parts by weight of the phosphorus, the weight ratio of the melamine cyanurate: trialkyl phosphate is 1:1 to 80:80
Phenolic foam.
The method of claim 6,
The composite flame retardant includes phosphorus, pentaerythritol-based compound and trialkyl phosphate,
Compared to 100 parts by weight of the phosphorus, the weight ratio of the pentaerythritol-based compound: trialkyl phosphate is 1:1 to 50:80
Phenolic foam.
The method of claim 6,
The composite flame retardant includes phosphorus, pentaerythritol-based compound, melamine cyanurate and trialkyl phosphate,
Compared to 100 parts by weight of the phosphorus, the weight ratio of the pentaerythritol-based compound: melamine cyanurate: trialkyl phosphate is 1:1 to 15:50:60
Phenolic foam.
According to claim 1,
The phenolic foam has a thermal conductivity of 0.016 W/m·K to 0.029 W/m·K measured at an average temperature of 20° C. according to KS L 9016.
Phenolic foam.
According to claim 1,
According to EN13823, after drying at 70°C for 7 days and then drying at 110°C for 14 days, the thermal conductivity measured at an average temperature of 20°C is 0.017 W/m·K to 0.029 W/m·K.
Phenolic foam.
According to claim 1,
Independent bubble rate is 70% to 98%
Phenolic foam.
According to claim 1,
Compression strength according to KS M ISO 845 is 120 kPa to 300 kPa
Phenolic foam.
According to claim 1,
Total calorific value (THR600s) of 10 minutes by cone calorimeter according to KS F ISO 5660-1 is 2.0 MJ/m 2 to 12 MJ/m 2
Phenolic foam.
According to claim 1,
Bending, according to KS M ISO 4898, the maximum load (N) until the specimen is judged at a specimen with a size of 250 mm (L), 100 mm (W), and 20 mm (T) with a 200 mm support spacing and a load concentration rate of 50 mm/min. Breaking load (N) of 15 N to 50 N
Phenolic foam.
According to claim 1,
The average value of the rate of dimensional change according to Equation 1 below is 0% to 1.0%.
Phenolic foam:

[Equation 1]
Dimensional change rate (%)=(Initial length(a)-Last length(a'))/Initial length(a) X 100

In Equation 1, the initial length (a) is the length of each line at n points equal in the length (L) and width (W) directions of the phenolic foam, and the later length (a') is the phenolic foam. It means the later length (a') of each line at the above point after standing in an oven at 70°C for 48 hours. (n is 2 to 5)
Preparing a flame retardant composition comprising a subject comprising a phenolic resin, a curing agent, a blowing agent and a first flame retardant;
Preparing a foam composition by stirring the subject, a curing agent, a foaming agent, and a flame retardant composition; And
Including; foam molding the foam composition;
The first flame retardant is Phosphorus,
According to KS F ISO 5660-1, when 50 kW radiant heat is applied to a foam having a size of 100 mm (length)Χ100 mm (width)✓50 mm (thickness) and having a surface area of 10,000 mm 2, the thickness of the foam is 1/2 of the initial thickness. The cross-sectional area of the spot has 50% to 95% of the surface area
Method for producing phenolic foam.
The method of claim 30,
At 20°C, the difference in viscosity (ΔV=|V1-V2|) between the viscosity (V1) of the phenolic resin and the viscosity (V2) of the flame retardant composition is 30,000 cps or less.
Method for producing phenolic foam.
A heat insulating material comprising the phenolic foam according to claim 1.

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