KR102514387B1 - Rigid polyurethane foam board with excellent flame retardancy, sound insulation and eco-friendliness - Google Patents

Abstract

The present invention relates to a rigid polyurethane foam board, and more particularly, to a rigid polyurethane foam board with excellent flame retardancy, sound insulation and eco-friendliness. The rigid polyurethane foam board comprises: polyurethane foam containing polyol, isocyanate, reaction catalyst, foaming agent and additives; and a surface material layer which is stacked on at least one surface of the polyurethane foam.

Description

Rigid polyurethane foam board with excellent flame retardancy, sound insulation and eco-friendliness}

The present invention relates to a rigid polyurethane foam board, and more particularly, to a rigid polyurethane foam board having improved flame retardancy, sound insulation and eco-friendliness.

Polyurethane foam prepared by blending polyol, isocyanate, and additives may be manufactured in a form having various characteristics such as flexible foam, rigid foam, and semi-rigid foam depending on the type of polyol and isocyanate used as raw materials. Soft polyurethane foam can be used in the manufacture of furniture, automobile seat foam, etc., and rigid polyurethane foam has good thermal insulation properties, so it is widely used for energy saving.

In particular, since the insulator made of rigid polyurethane foam is lightweight and has excellent thermal insulation, sound insulation and molding processability, it can be used in a variety of ways, such as building insulation, refrigerators, refrigerated containers, ships, insulation materials, and other ornaments. In order to manufacture a rigid polyurethane foam used as a heat insulating material, polyisocyanate and a polyol composition solution may be used.

Polyol is cured while reacting with polyisocyanate to form a macromolecule, and various types of compounds may be blended to control properties after curing. For example, physical and chemical blowing agents may be used to control density, and amines and metal catalysts may be added to control curing speed. Accordingly, the structure and characteristics of the expanded foam may appear differently. And they have compatibility so that the problem of phase separation does not occur during mixing. Recent technology has developed various manufacturing process technologies that satisfy all of these conditions, and can greatly contribute to improving the performance of the insulator.

On the other hand, materials used as interior and exterior materials of buildings should be stable against fire as well as excellent insulation properties. Insulation materials made of polyurethane foam are optimal materials in terms of insulation performance and environment-friendliness, and demand for them is gradually increasing, but vulnerability to fire can be pointed out as a serious problem. Even in domestic and foreign situations, the perception that energy saving is an important solution as an alternative to reducing climate change and environmental pollutant emissions is spreading, and for this purpose, it may be advantageous to use polyurethane foam with good insulation performance. However, since polyurethane foam is vulnerable to fire and toxic gas is generated in case of fire, development of polyurethane foam resistant to fire is required.

For flame retardant performance of insulation materials including polyurethane foam, attempts to introduce chemical techniques such as adding flame retardant components and changing formulations have been continued. However, in actual commercial products, there are problems such as a high defect rate and a decrease in insulation performance due to the added flame retardant component. That is, although there is a large demand for a heat insulating material capable of satisfying both heat insulating performance and flame retardant performance, it is very difficult to satisfy this demand.

Republic of Korea Patent Publication No. 2001-0049989

A technical problem to be achieved by the present invention is to provide a rigid polyurethane foam board capable of maintaining physical properties such as moldability, compressive strength, and dimensional stability while having improved flame retardancy, sound insulation and eco-friendliness.

The technical problem to be achieved by the present invention is not limited to the above-mentioned technical problem, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description below. There will be.

In order to achieve the above technical problem, one embodiment of the present invention, polyurethane foam containing polyol, isocyanate, reaction catalyst, foaming agent and additives; and a surface material layer laminated on at least one surface of the polyurethane foam, wherein the additive is included in an amount of 1 to 10 parts by weight based on 100 parts by weight of the polyol, and the additive comprises the 20 to 50% by weight of boron nitride (BN) based on the total weight of the additives, and the surface material layer includes a base layer of a non-woven fabric; And a flame retardant coating layer formed by coating a flame retardant coating liquid on the surface of the base layer; The flame retardant coating solution contains 1 to 30% by weight of boron nitride, 1 to 30% by weight of soundproof material, 5 to 50% by weight of aluminum paste or aluminum powder, 20 to 50% by weight of a binder, and 3 to 35% by weight of a solvent. It is characterized by including.

The soundproofing material is characterized in that it is a mixed powder obtained by mixing vermiculite, perlite, talc and loess in a weight ratio of 0.5 to 0.8: 1 to 1.2: 1 to 1.2: 0.5 to 0.7. The binder is characterized in that it comprises corn starch, starch and sugar, which are eco-friendly binder components.

The polyol is a mixture of ester polyol and bio polyol in a weight ratio of 2 to 3: 4 to 6, and the bio polyol has a functional group number of 3 or more, a hydroxyl value of 200 to 600 mgKOH / g, and a viscosity (25 Characterized in that ℃ is 2,000 to 25,000 cp.

In the polyurethane foam, the boron nitride is covalently bonded with the isocyanate to form a three-dimensional network structure heat transfer path, and the additive is 10 to 30% by weight of mineral water, which is a mixture of mineral components and deep sea water. Further comprising, wherein the mineral component is coated on the surface of the three-dimensional network structure.

The mineral components include calcium (Ca), iron (Fe), sodium (Na), potassium (K), chlorine (Cl), zinc (Zn), magnesium (Mg), iodine (I) and selenium (Se). combination, and the mineral component may be included in an amount of 10 to 30% by weight based on the total weight of the deep sea water.

The additives contain at least one inorganic flame retardant selected from the group consisting of aluminum hydroxide, magnesium hydroxide, antimony oxide, tin hydroxide, tin oxide, molybdenum oxide, zirconium compounds, and calcium salts, based on the total weight of the additives, ranging from 10 to 10 An antibacterial agent in which metal ions of silver (Ag), copper (Cu) or zinc (Zn) are adhered to a porous inorganic carrier which is further included at 30% by weight and is zeolite, silica alumina or calcium phosphate, based on the total weight of the additive It is characterized in that it further comprises 10 to 30% by weight relative to.

In order to achieve the above technical problem, another embodiment of the present invention, polyurethane foam containing polyol, isocyanate, reaction catalyst, foaming agent and additives; and a surface material layer laminated on at least one surface of the polyurethane foam, wherein the additive is included in an amount of 1 to 10 parts by weight based on 100 parts by weight of the polyol, and the additive comprises the 20 to 50% by weight of boron nitride (BN) based on the total weight of the additives, and the surface material layer includes: a pulp layer attached to the polyurethane foam; an intermediate layer located on the pulp layer and including a flame retardant soundproofing member; and an aluminum layer positioned on the intermediate layer. It is characterized in that it includes.

The pulp layer is formed by mixing natural pulp paper and non-woven fabric, and the natural pulp paper is characterized in that it is made of natural materials such as rice husk, corn cobs, rice bran or a combination thereof.

The intermediate layer may have a single-layer or multi-layer structure, and the flame-retardant soundproof member may be processed into a pellet form by mixing a flame-retardant component with a mixed fiber of polyester and polyethylene terephthalate (PET).

According to an embodiment of the present invention, it is possible to provide a rigid polyurethane foam board capable of maintaining thermal and chemical stability, moldability, compressive strength, and dimensional stability while having improved flame retardancy, sound insulation, and eco-friendliness.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be inferred from the description of the present invention or the configuration of the invention described in the claims.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and, therefore, is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is said to be "connected (connected, contacted, combined)" with another part, this is not only "directly connected", but also "indirectly connected" with another member in between. "Including cases where In addition, when a part "includes" a certain component, it means that it may further include other components without excluding other components unless otherwise stated.

Terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "include" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Rigid polyurethane foam board according to an embodiment of the present invention, polyurethane foam containing polyol, isocyanate, reaction catalyst, foaming agent and additives; and a surface material layer laminated on at least one surface of the polyurethane foam.

<Polyurethane foam>

The polyurethane foam may be a foamed product having a cell structure obtained by reacting polyol and isocyanate with a blowing agent. Polyurethane foam according to an embodiment of the present invention may be a polyurethane foam that is not harmful to the human body without high inflammability in the event of a fire and low emission of harmful gases.

The polyurethane foam, polyol; isocyanates; reaction catalyst; blowing agent; and an additive including the boron nitride (BN); It can be prepared by the reaction of a composition containing. Specifically, the polyurethane foam, 100 parts by weight of the polyol; 80 to 150 parts by weight of isocyanate; 0.1 to 10 parts by weight of a reaction catalyst; 1 to 30 parts by weight of a foaming agent; and 1 to 10 parts by weight of an additive containing the boron nitride (BN); can include

polyol

The polyol may be a mixture of bio polyol and any one selected from ether polyol, ester polyol, or a combination thereof. For example, the polyol may be a combination of an ester polyol and a bio polyol. Specifically, the polyol may be a mixture of ester polyol and bio polyol at a weight ratio of 2 to 3:4 to 6, for example, 2.5:5.

When a mixture of ester polyol and bio polyol is used as the polyol, while maintaining physical properties as a heat insulating material such as thermal conductivity and compressive strength, it is possible to reproduce and thus exhibit environmentally friendly advantages.

The hydroxyl value of the ester polyol may be in the range of 50 to 600 mgKOH/g. Physical properties of the rigid polyurethane foam, for example, thermal conductivity and strength characteristics (compressive strength, flexural strength, etc.) can be adjusted through appropriate selection of the hydroxyl value.

As an example of the ester polyol, a reaction product of a polyhydric alcohol and a polyhydric acid (especially a polyhydric carboxylic acid) is exemplified. At this time, instead of the polyhydric acid, an anhydride thereof, an ester compound with a lower alcohol, or a mixture thereof may be used. More specifically, diacids (e.g., phthalic anhydride, terephthalic acid, sberic acid, sebacic acid, isophthalic acid, trimellitic acid, succinic acid, adipic acid, fumaric acid, etc.) and polyhydric alcohols (e.g., ethylene glycol) , diethylene glycol, 1,4-butanediol, glycerin, trimethylolpropane, propylene glycol, etc.) may be used. In addition, a single ester polyol may be used, or two or more ester polyols may be used in combination.

The bio-polyol, by exhibiting an appropriate number of functional groups and viscosity, can maintain physical properties such as excellent reactivity, compressive strength, flexural strength, and dimensional stability when manufacturing rigid polyurethane foam, and can be reproduced, thereby exhibiting the advantage of eco-friendliness. make it possible

The bio-polyol may be obtained by exchanging a polyfunctional alcohol and a natural oil in the presence of a catalyst. It may be prepared by performing an additional reaction by adding alkylene oxide to the product of the exchange reaction.

The polyfunctional alcohol may be ethylene glycol, diethylene glycol, glycerin, trimethanol propane, pentaerythritol, dipentaerythritol, alpha methyl glucoside, xylitol, sorbitol, sugar, or a mixture thereof.

The natural oil may be an animal or vegetable oil, and specifically, a vegetable oil. Examples of the vegetable oil include sunflower seed oil, canola oil, palm oil, corn oil, cottonseed oil, rapeseed oil, linseed oil, safflower oil, oat oil, olive oil, palm oil, peanut oil, rapeseed oil, rice bran oil, flaxseed oil, sesame oil, It may be at least one selected from the group consisting of soybean oil, castor oil, and mixtures thereof. For example, the natural oil may be any one selected from soybean oil, linseed oil, rice bran oil, and combinations thereof.

The alkylene oxide may be ethylene oxide, propylene oxide or a mixture thereof.

The bio-polyol may have a functional group number of 3 or more, a hydroxyl value of 200 to 600 mgKOH/g, and a viscosity (2,000 to 25,000 cp at 25°C).

isocyanate

The isocyanate reacts with a polyol to form a urethane bond in the foam, and may include a compound in which an aromatic, alicyclic, and/or aliphatic group is connected to an isocyanate group.

The isocyanate compound is known in the art, for example, ethylene diisocyanate, 1,4-tetramethylene diisocyanate, 1,6-hexamethylene diisocyanate, 1,12-dodecane diisocyanate, cyclobutane-1, 3-diisocyanate, cyclohexane-1,3-diisocyanate, cyclohexane-1,4-diisocyanate, 1-isocyanato 3,3,5-trimethyl-5-isocyanatomethyl-cyclohexane (isophorone diisocyanate), 2,4-hexahydrotoluene diisocyanate, 2,6-hexahydrotoluene diisocyanate, dicyclohexylmethane-4,4'-diisocyanate (hydrogenated MDI, or HMDI) and 1,3-phenylene diisocyanate or any one selected from combinations thereof may be used, but is not limited thereto.

Reaction catalyst and blowing agent

The reaction catalyst may be used to shorten a curing time or the like during the reaction between the polyol and isocyanate. The catalyst is not particularly limited, but typically one or more selected from the group consisting of amine-based catalysts such as secondary or tertiary amine compounds and metal catalysts such as organic metals may be used.

Examples of the amine-based catalyst include triethylenediamine, triethylamine, tripropylamine, triisopropanolamine, tributylamine, trioctylamine, hexadecyldimethylamine, tetramethylethylenediamine, 3-methoxy-N- It may be at least one selected from dimethyl-propylamine, diethylethanol-amine, N-cocomopholine, and N,N-diethyl-3-diethylaminopropyl amine.

The metal catalyst is, for example, one selected from the group consisting of potassium octoate, potassium acetate, bismuth-based gel catalyst and tin type catalyst More can be used.

The foaming agent may serve to generate bubbles during the urethane reaction. The blowing agent may be, for example, a mixture of one or more of cyclopentane (c-pentane), dichlorofluoroethane (HCFC141b), and fluorocarbons (HFC-365, HFC-365/227).

additive

The additive may include boron nitride as a flame retardant, specifically, an inorganic flame retardant. The boron nitride has a high melting point, and forms a three-dimensional network heat transfer path by forming a covalent bond with the isocyanate, thereby exhibiting excellent flame retardancy.

As the inorganic flame retardant, in addition to the boron nitride, at least one selected from the group consisting of aluminum hydroxide, magnesium hydroxide, antimony oxide, tin hydroxide, tin oxide, molybdenum oxide, zirconium compounds, and calcium salts may be further included and used. For example, the additive may further include antimony oxide, magnesium hydroxide, or a mixture thereof in addition to boron nitride, and may be used as an inorganic flame retardant.

The boron nitride is a metal such as gold (Au), aluminum (Al), copper (Cu) or silver (Ag), for example, graphite, graphene, graphene oxide ( grapheme oxide), single and multi-walled carbon nanotubes, or carbon fibers.

The boron nitride may be included in an amount of 20 to 50% by weight based on the total weight of the additive. Inorganic flame retardants other than boron nitride, for example, at least one selected from the group consisting of aluminum hydroxide, magnesium hydroxide, antimony oxide, tin hydroxide, tin oxide, molybdenum oxide, zirconium compounds, and calcium salts. When used, they may be additionally used in an amount of 10 to 30% by weight based on the total weight of the additives.

The additive may further include an antibacterial agent obtained by attaching metal ions such as silver (Ag), copper (Cu), or zinc (Zn) to a porous inorganic carrier such as zeolite, silica alumina, or calcium phosphate. The antimicrobial agent may be included in an amount of 10 to 30% by weight based on the total weight of the additive.

The additive may further include mineral water. The mineral water may include mineral components in deep sea water. The deep ocean water may refer to mineral-rich water in a stable sea with a deep depth and low movement. The mineral components include, for example, calcium (Ca), iron (Fe), sodium (Na), potassium (K), chlorine (Cl), zinc (Zn), magnesium (Mg), iodine (I) and selenium (Se) It may be one or more selected from the group consisting of. For example, the mineral components include calcium (Ca), iron (Fe), sodium (Na), potassium (K), chlorine (Cl), zinc (Zn), magnesium (Mg), iodine (I) and selenium ( Se) may all be included.

The mineral water further doubles the flame retardancy while the mineral component is coated at a high density on the three-dimensional network structure formed by the boron nitride and the isocyanate. In addition, the mineral water may help the antibacterial action of the polyurethane foam, that is, prevent external bacteria from penetrating into the inside. The mineral water may be included in an amount of 10 to 30% by weight based on the total weight of the additive.

The additive may further include one or more other additives selected from the group consisting of a surfactant including a silicone-based surfactant, a chain extender, a colorant, and an antistatic agent, based on the total weight of the additive, within the range of 0.1 to 5% by weight. can

The thickness of the polyurethane foam is not particularly limited, and may be appropriately selected in consideration of the characteristics of the region where the heat insulating material is constructed, the requirement for securing space, and the like. The polyurethane foam may have a plate-shaped or hexahedral shape having a predetermined thickness. The polyurethane foam may have a thickness of 20 mm to 200 mm, preferably 40 mm to 150 mm, and more preferably 50 mm to 100 mm, but may not be limited thereto.

<Surface material layer>

The surface material layer may be laminated on one side or more, specifically, two or more sides, more specifically, the entire surface of the polyurethane foam.

In one embodiment, the surface material layer, the base layer attached to the polyurethane foam; And a flame retardant coating layer formed on the base layer; It may be a structure including.

The base layer, for example, may be composed of a non-woven fabric. The basis weight of the nonwoven fabric may be 30 g/m 2 to 90 g/m 2 , and may be composed of fibers having a thickness of 30 μm to 80 μm. The pores of the fiber may be 5 μm to 20 μm. The non-woven fabric may be composed of natural fibers made of one or more of jute, rice straw, and coconut shells, and a coating film formed on the outer surface of the natural fibers to prevent evaporation of moisture.

The coating film may be a polymer capable of improving water retention by preventing water evaporation and forming a film having a waterproof function by reacting with water. The type of coating film may not be limited. For example, the coating film may be composed of one or a combination of polyvinyl alcohol, carboxymethylcellulose, hydroxyethyl cellulose, polyvinylpyrrolidinone, and teracontrol.

The base layer may further include a flame retardant coating layer formed by coating and curing a flame retardant coating liquid on the surface of the nonwoven fabric. The flame retardant coating layer may simultaneously exhibit flame retardancy and sound insulation.

The flame retardant coating layer may have a thickness of 0.5 to 1 mm. When the thickness of the flame retardant coating layer is within the above-described range, flame retardancy is excellent, waterproofness is excellent, generation of harmful gases can be significantly reduced in the event of a fire, excellent heat insulation properties, lightweight insulation is easy to install, and strength is excellent. And, the appearance is beautiful, and at the same time it can be excellent in durability.

The flame retardant coating solution may include 1 to 30% by weight of a flame retardant, 1 to 30% by weight of a soundproofing material, 5 to 50% by weight of aluminum paste or aluminum powder, 20 to 50% by weight of a binder, and 3 to 35% by weight of a solvent.

The flame retardant may be any one selected from inorganic flame retardants, specifically, boron nitride, aluminum hydroxide, magnesium hydroxide, zinc borate, and combinations thereof. For example, the flame retardant may be boron nitride.

The soundproofing material may be a mixture of at least one selected from the group consisting of mineral-based materials, specifically, vermiculite, perlite, talc, nanoclay, volcanic ash, white clay, and loess. For example, the soundproofing material may be a mixed powder obtained by mixing vermiculite, perlite, talc, and loess in a weight ratio of 0.5 to 0.8: 1 to 1.2: 1 to 1.2: 0.5 to 0.7.

The binder may include corn starch, starch, and sugar, which are eco-friendly binder components.

The solvent may be water or mineral water. The mineral water may include mineral components in deep sea water. The deep ocean water may refer to mineral-rich water in a stable sea with a deep depth and low movement.

The mineral components include, for example, calcium (Ca), iron (Fe), sodium (Na), potassium (K), chlorine (Cl), zinc (Zn), magnesium (Mg), iodine (I) and selenium (Se) It may be one or more selected from the group consisting of. For example, the mineral components include calcium (Ca), iron (Fe), sodium (Na), potassium (K), chlorine (Cl), zinc (Zn), magnesium (Mg), iodine (I) and selenium ( Se) may all be included. The mineral component may be contained in an amount of 10 to 30% by weight based on the total weight of the deep sea water.

The mineral water may double the flame retardancy of the flame retardant coating layer by the mineral component. In addition, the mineral water may help the flame retardant coating layer to act as an antibacterial agent and prevent external bacteria from penetrating into the cell.

As the aluminum paste, aluminum powder, and the binder, materials well known in the art for surface materials of rigid polyurethane foam boards may be used.

In another embodiment, the surface material layer may include a pulp layer attached to the polyurethane foam; an intermediate layer located on the pulp layer and including a flame retardant soundproofing member; and an aluminum layer positioned on the intermediate layer. can include

The pulp layer may be composed of any one selected from non-woven fabric, woven fabric, kraft paper, manufactured natural pulp paper, or a combination thereof. For example, the pulp layer may use a mixture of natural pulp paper and nonwoven fabric. The pulp layer, while being excellent in soundproofing, insect-repellent, and moisture-proofing due to the natural pulp paper, along with the durability of the nonwoven fabric, can exhibit an effect of preventing environmental pollution by including natural ingredients.

For example, the natural pulp paper may be manufactured using natural materials such as rice hulls, corn cobs, rice bran, or a combination thereof.

The intermediate layer, including a flame retardant soundproofing member, may be formed in a single layer or a multilayer structure of two or more layers. When the intermediate layer has a multilayer structure, the flame retardant soundproofing member may have a structure in which two or more layers are stacked. The flame retardant soundproof member may be processed into a pellet form by mixing a flame retardant component in a mixed fiber of polyester and polyethylene terephthalate (PET). The flame retardant component may be an inorganic flame retardant used in the above-described flame retardant coating solution.

The aluminum layer is a layer containing aluminum and may have a sheet or mat shape. The aluminum layer, including aluminum, realizes flame retardancy and at the same time resists moisture and acts as a barrier layer against the foaming gas of the thermosetting foam, thereby realizing a high level of long-term insulation.

The aluminum layer may have a single-layer or multi-layer structure. When the aluminum layer has a multilayer structure, it may have a structure in which multiple aluminum layers are laminated or a structure in which multiple aluminum layers and multiple glass fiber layers are laminated. When the aluminum layer includes a structure in which a glass fiber layer and an aluminum layer are laminated, flame retardancy and excellent thermal insulation properties may be implemented for a long period of time while having excellent dimensional stability.

Hereinafter, preferred embodiments are presented to aid understanding of the present invention, but the following examples are merely illustrative of the present invention, and it is obvious to those skilled in the art that various changes and modifications are possible within the scope and spirit of the present invention. However, it is natural that such variations and modifications fall within the scope of the appended claims.

[Example 1]

Manufacture of base layer

30% by weight of boron nitride, 25% by weight of a mixture of vermiculite, perlite, talc and loess in a weight ratio of 0.7: 1.2: 1.2: 0.6, 30% by weight of aluminum paste or aluminum powder, corn starch, starch and sugar. After preparing a flame retardant coating solution containing 15% by weight of a binder and 15% by weight of water, the surface of the nonwoven fabric was coated to a thickness of 0.8 mm and cured to form a base layer.

polyurethane foam manufacturing

Sugar, soybean oil, rice bran oil, and KOH (45% by weight) catalyst were added to a 20L high-pressure vessel, stirred under a nitrogen atmosphere (substitution under reduced pressure), and then vacuum dehydrated at about 120 ° C. for about 1 hour. The reaction was carried out. Then, propylene oxide was introduced at about 115° C. and reacted for 15 hours. A catalyst adsorbent and water were added to the reaction product obtained as described above, stirred at about 80° C. for about 1 hour, and then filtered to prepare bio-polyol.

Then, 100 parts by weight of a polyol obtained by reacting terephthalic acid and ethylene glycol, and a polyol obtained by mixing the bio-polyol at a weight ratio of 2.5:5; 120 parts by weight of isocyanate, which is ethylene diisocyanate; 3 parts by weight of a triethylenediamine reaction catalyst; 25 parts by weight of a blowing agent which is cyclopentane; And, 10 parts by weight of an additive containing 45% by weight of boron nitride (BN) and 25% by weight of calcium phosphate containing silver (Ag); was reacted to prepare a polyurethane foam. Thereafter, a rigid polyurethane foam board was prepared by combining the base layer and the polyurethane foam.

[Example 2]

A rigid polyurethane foam board was manufactured in the same manner as in Example 1, except for the details described below, but mineral water, not water, was used in an amount of 15% by weight in the base layer.

[Example 3]

A rigid polyurethane foam board was prepared in the same manner as in Example 1, except for the details described below, but 25% by weight of mineral water was further included in the additives.

[Example 4]

Except for the details described later, a rigid polyurethane foam board was manufactured in the same manner as in Example 1, except that 15% by weight of mineral water instead of water was used in the base layer, and 25% by weight of mineral water was used in the additives. % was further included.

[Example 5]

Except for the details described below, a rigid polyurethane foam board was prepared in the same manner as in Example 1, but in the additives, 25% by weight of boron nitride (BN) and 25% by weight of calcium phosphate containing silver (Ag) and 25% by weight of mineral water.

[Example 6]

Except for the details described later, a rigid polyurethane foam board was prepared in the same manner as in Example 3, but a mixture of the polyol, the ester polyol and the bio polyol at a weight ratio of 3:4 was used.

[Example 7]

Except for the details described later, a rigid polyurethane foam board was manufactured in the same manner as in Example 3, but 25% of a mixture of perlite and talc in a weight ratio of 1: 1 was used as a soundproofing material.

[Comparative Example 1]

Except for the details described later, a rigid polyurethane foam board was manufactured in the same manner as in Example 1, but boron nitride was not included when the polyurethane foam was manufactured.

[Comparative Example 2]

Except for the details described later, a rigid polyurethane foam board was manufactured in the same manner as in Example 1, but boron nitride was not included in the flame retardant coating solution when preparing the base layer.

[Comparative Example 3]

Except for the details described later, a rigid polyurethane foam board was manufactured in the same manner as in Example 1, but aluminum hydroxide was used instead of boron nitride.

[Comparative Example 4]

Except for the details described below, a rigid polyurethane foam board was prepared in the same manner as in Example 1, but only ester polyol was used without using bio polyol.

[Comparative Example 5]

Except for the details described below, a rigid polyurethane foam board was manufactured in the same manner as in Example 1, but the soundproofing material was not included.

<Experimental Example 1: Physical properties and flame retardant properties>

The physical properties and flame retardant properties of the rigid polyurethane foam boards of Examples 1-6 and Comparative Examples 1-4 were evaluated. The results are shown in Tables 1 and 2 below.

Thermal conductivity (insulation)

It was measured using KS M3809.

compressive strength

It was measured using KS M3809.

Dimensional stability

Measured using ASTM D2126.

flame retardant properties

- Gas toxicity test: test method KS F 2271

- Heat release rate test: test method KS F ISO 5660-1

The evaluation method quantified the degree of excellence within the range of 1 to 10 (1: poor ~ 5: average ~ 10: excellent)

Referring to Tables 1 and 2, the examples of the present invention received excellent evaluation overall in terms of physical properties and flame retardant properties of the heat insulating material compared to the comparative examples. Among them, both the substrate layer and the polyurethane foam contain boron nitride, mineral water, and ester polyol and bio polyol as polyols are blended in a weight ratio of 2.5: 5, the physical properties and flame retardancy of Example 4 characteristics were evaluated as the best.

<Experimental Example 2: Soundproofing Characteristics>

The sound insulation properties of the rigid polyurethane foam boards of Examples 1 and 7 and Comparative Example 5 were evaluated. The evaluation method is as follows.

acoustic transmission loss

According to SAE Practice JI400 of ASTM E 90-87, the average value of sound transmission loss (dB) at a frequency of 1,000 Hz was measured. Sound transmission loss (dB) is a measure of the anti-noise effect according to the frequency of the composition, and the higher the value, the better the sound-proof effect. The results are shown in Table 3 below.

Referring to Table 3, the examples including the soundproof material exhibited superior soundproofing effects compared to the comparative example. Among them, in Example 1, by including a mineral-based material as a sound-proofing material in the surface material layer, it was confirmed that it exhibited excellent sound-proofing as well as flame retardancy.

The above description of the present invention is for illustrative purposes, and those skilled in the art can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included in the scope of the present invention.

Claims (10)

Polyurethane foam containing polyol, isocyanate, reaction catalyst, foaming agent and additives; And a surface material layer laminated on at least one surface of the polyurethane foam; In the rigid polyurethane foam board comprising a,
The additive is included in an amount of 1 to 10 parts by weight relative to 100 parts by weight of the polyol, and the additive includes 20 to 50% by weight of boron nitride (BN) based on the total weight of the additive,
The surface material layer, a base layer of a non-woven fabric; And a flame retardant coating layer formed by coating a flame retardant coating liquid on the surface of the base layer; including,
The flame retardant coating solution includes 1 to 30% by weight of boron nitride, 1 to 30% by weight of soundproofing material, 5 to 50% by weight of aluminum paste or aluminum powder, 20 to 50% by weight of a binder, and 3 to 35% by weight of a solvent. Rigid polyurethane foam board to do. According to claim 1,
The soundproofing material is a mixed powder of vermiculite, perlite, talc and loess in a weight ratio of 0.5 to 0.8: 1 to 1.2: 1 to 1.2: 0.5 to 0.7, rigid polyurethane foam board. According to claim 1,
The binder, characterized in that it comprises corn starch, starch and sugar, which are eco-friendly binder components, rigid polyurethane foam board. According to claim 1,
The polyol is a mixture of ester polyol and bio polyol in a weight ratio of 2-3: 4-6,
The bio-polyol has a functional group number of 3 or more, a hydroxyl value of 200 to 600 mgKOH / g, and a viscosity (25 ° C. of 2,000 to 25,000 cp). According to claim 1,
In the polyurethane foam, the boron nitride is covalently bonded with the isocyanate to form a three-dimensional network structure heat transfer path,
The additive further comprises 10 to 30% by weight of mineral water, which is a mixture of mineral components and deep sea water,
The mineral component is characterized in that coated on the surface of the three-dimensional network structure, rigid polyurethane foam board. According to claim 5,
The mineral components include calcium (Ca), iron (Fe), sodium (Na), potassium (K), chlorine (Cl), zinc (Zn), magnesium (Mg), iodine (I) and selenium (Se). is a combination,
The mineral component, based on the total weight of the deep sea water, is contained in 10 to 30% by weight, rigid polyurethane foam board. According to claim 1,
The additives contain at least one inorganic flame retardant selected from the group consisting of aluminum hydroxide, magnesium hydroxide, antimony oxide, tin hydroxide, tin oxide, molybdenum oxide, zirconium compounds, and calcium salts, based on the total weight of the additives, ranging from 10 to 10 Further containing 30% by weight,
An antibacterial agent in which metal ions such as silver (Ag), copper (Cu) or zinc (Zn) are adhered to a porous inorganic carrier such as zeolite, silica alumina or calcium phosphate is added in an amount of 10 to 30% by weight based on the total weight of the additives Characterized in that it comprises a rigid polyurethane foam board. Polyurethane foam containing polyol, isocyanate, reaction catalyst, foaming agent and additives; And a surface material layer laminated on at least one surface of the polyurethane foam; in a rigid polyurethane foam board comprising a,
The additive is included in an amount of 1 to 10 parts by weight relative to 100 parts by weight of the polyol, and the additive includes 20 to 50% by weight of boron nitride (BN) based on the total weight of the additive,
The surface material layer may include a pulp layer attached to the polyurethane foam; an intermediate layer located on the pulp layer and including a flame retardant soundproofing member; and an aluminum layer positioned on the intermediate layer. Characterized in that it comprises a, rigid polyurethane foam board. According to claim 8,
The pulp layer is formed by mixing natural pulp paper and nonwoven fabric,
The natural pulp paper is a rigid polyurethane foam board, characterized in that made of natural materials such as rice husk, corn cob, rice straw or a combination thereof. According to claim 8,
The intermediate layer has a single layer or multi-layer structure,
The flame retardant soundproofing member is processed into a pellet form by mixing a flame retardant component with a mixed fiber of polyester and polyethylene terephthalate (PET), a rigid polyurethane foam board.