KR101242875B1 - Polyurethane foam using expanded perlite with closed cell, its foaming machine and its manafacturing method - Google Patents

Abstract

The present invention relates to a polyurethane foam using expanded perlite in a closed cell and a method of manufacturing the same.
In a composition suitable for producing a polyurethane foam, the composition is characterized by comprising a particle having a closed cell shape as an active ingredient.
According to the present invention, there is no absorption of resin on polyols and isocyanates, and by having a hollow form of a closed cell, excellent dispersing force is ensured, and a closed cell expansion perlite inside the foam ensures strong interfacial bonding force with the foam cell and inside the cell. Filled or by serving as a support between the cells, the thermal insulation, flame retardancy and mechanical properties are improved, and there is provided a polyurethane foam without a decrease in thermal conductivity.

Description

Polyurethane foam using expanded perlite with closed cell, its foaming machine and its manafacturing method}

The present invention relates to a closed cell expanded perlite and polyurethane foam, in particular by using a hollow closed cell expanded perlite having no needle-like structure on the surface, sufficient mechanical properties and excellent thermal insulation, flame retardancy and light weight The present invention relates to a polyurethane foam, a foaming machine and a method of manufacturing the same, using expanded perlite in a closed cell capable of reducing the amount of polyurethane used.

Polyurethane foam is a form in which a polyol component and an isocyanate component are reacted by mixing a physical blowing agent, a reaction catalyst, and other additives, and a foam is vaporized by the heat of reaction generated during the reaction to form a foam, or the reaction between water and isocyanate. It refers to a porous urethane in the form of a water-foamed foamed by carbon dioxide produced by. The polyurethane foam has a variety of advantages such as excellent heat insulating properties, self-adhesiveness, light weight, cushioning, ease of manufacture, such as building panels, piping insulation, cold storage insulation, lightweight structural materials, cushioning material, cushion material, sound absorbing material, etc. Although it is widely used, there are problems such as shrinkage caused by temperature change, mechanical properties and thermal insulation, etc., and it has a weak point in heat resistance and flame retardancy such as burning easily in a fire to propagate a flame and generating toxic gas. have.

In order to reinforce the strength of polyurethane foam, to suppress shrinkage, to increase flame retardancy and heat resistance, a method of using a filler such as glass fiber or nanoclay has been studied, but these methods increase the thermal conductivity of polyurethane foam. This lowers the insulation and reduces the foaming force of the foam due to the high density of the additive. In addition, in the preparation of foam, the use of a solvent and an excessive use of a surfactant for the dispersion in the process of mixing the filler with a polyol or isocyanate, an increase in the process cost due to the installation of ultrasonic dispersion equipment, the storage of the resin due to the precipitation of the filler Problems occur.

In addition, foams are prepared by mixing expanded expanded particles such as perlite with polyol or isocyanate, such as vermiculite or Korean Patent Application Nos. 10-2001-0047103, 10-2009-0008122 for the purpose of reinforcing the flame retardancy of the foam. In general, in the case of general expanded inorganic particles, the specific surface area is large, and has an open cell structure, so that polyols or isocyanates are absorbed into the cells or agglomeration between foamed particles occurs when polyurethane is produced. Accordingly, there is a difference in the equivalent ratio for the reaction does not induce a sufficient reaction, there is a problem that the mechanical properties of the foam is reduced due to the low interfacial bonding force between the foam particles and polyurethane.

 In the case of the expanded perlite applied as a filler, spherical shapes have also been developed, but this improves the strength for the purpose of construction, light weight, etc. than the existing expanded perlite, so that the expanded cells inside and the weight of the particles are mostly large. to be.

For example, Japanese Patent Application No. 2007-320805 Hard Foamed Perlite and Manufacturing Method thereof discloses the production of fine spherical high strength hard foamed perlite by adjusting the firing conditions for each compressive strength of the expanded perlite.

U.S. Patent No. 5,005,696 Round baler discloses the production of spherical expanded perlite using an indirect thermal expansion kiln.

The above inventions have a high specific gravity of the expanded perlite because the main purpose is to provide high strength and light weight to paints and building materials, and to be less absorbed or absorbed when used with liquid resins, but only for spherical non-porous. The walls between the cells become thicker, acting as extenders, but have adverse effects on other properties such as thermal conductivity.

In addition, as a blowing agent used in polyurethane foams, chlorofluorocarbons (CFC) and hydrochlorochlorocarbons (HCFC) having boiling points at room temperature have been used, but the above substances destroy the ozone layer of the environment. It has already been found to be a factor of change, and is already banned in developed countries, and products produced using such substances are also prohibited. Even in Korea, CFC is banned after 2009.

Due to these environmental problems, pentanes have been proposed as alternative foaming agents and applied to some polyurethane foams. However, pentanes are explosive even when only a small amount is present in the air. do. In addition, there is a vulnerability of explosion and fire also in the use of foam foam made of pentane.

In addition, in the case of water-blown foams which foam with carbon dioxide produced by the chemical reaction of water and isocyanate presented by this solution, there is no risk of explosion by foaming gas, but carbon dioxide is more insulated than CFC. As the efficiency decreases and polyurethane foaming increases urea bonds than urethane bonds due to water and isocyanate, the surface of the foam becomes harder. In addition, the foam using water tends to increase the brittleness due to the rigidity of the surface, and deformability deteriorates due to the increase in the foaming pressure caused by the generation of excess carbon dioxide.

The present invention is to solve the above problems, the first problem is to provide a hollow closed cell-shaped expanded perlite having no needle structure on the surface in a general polyurethane foam, it is light and uniformly dispersed and does not absorb oil In addition, while the strength of the polyurethane foam reinforcement, shrinkage suppression, flame retardancy and heat resistance increase, the cell of the polyurethane foam is stably formed. In addition, unlike other fillers have a hollow cell inside to prevent a decrease in thermal conductivity.

In addition, the hollow perlite polyurethane foam with improved mechanical properties by providing a functional group capable of inducing strong bonding such as a silane coupling agent, a titanium coupling agent and a zirconium coupling agent on the surface of the hollow perlite as an additional action for improving the bonding strength. It is to provide a technique for manufacturing.

The second problem to be achieved in the present invention is a closed cell shape surface treated with a problem such as surface hardening, a decrease in bonding strength, an increase in the foaming pressure, which is a problem that occurs in the water-foaming system for forming a foam with water as a foaming agent By preparing a foam containing expanded perlite, the reaction of urea bonds is induced stably to induce inhibition of overhardening and control of foaming pressure, and to provide a technique for reinforcing heat insulation, flame retardancy, and mechanical properties.

The polyurethane foam according to the invention is characterized in that it comprises a closed cell shaped expanded perlite.

According to another preferred feature of the invention, the closed cell-shaped expanded perlite includes 50% by weight or more relative to the total weight of the expanded perlite.

According to another preferred feature of the present invention, at least one coupling agent selected from a silane coupling agent, a titanium coupling agent and a zirconium coupling agent is provided on the surface of the closed cell expanded perlite.

Polyurethane foam manufacturing method using the expanded perlite of the closed cell according to the present invention is characterized in that it is prepared by mixing 1 to 50% by weight of the closed cell expanded perlite with respect to the total amount of polyol and isocyanate mixture 100% by weight.

According to another preferred feature of the present invention, the closed cell expanded perlite and the polyol are mixed to form a polyol mixture, and the polyol mixture and the isocyanate are transferred to a mixing head to prepare a polyurethane foam.

According to another preferred feature of the present invention, the closed cell expanded perlite, the polyol, and the isocyanate are individually transferred to a mixing head to produce a polyurethane foam.

Polyurethane foam foam using expanded cell expanded perlite of the present invention is a polyol stirred tank in which the polyol and the closed cell-shaped expansion perlite is mixed; Isocyanate stirring tank in which isocyanate is stored while stirring; A plurality of piston pumps connected to the polyol stirring tank; At least one cylinder pump connected to the isocyanate stirring tank; And a mixing head which reacts while the polyol transferred by the piston pump and the cylinder pump, the closed cell expanded perlite, and the isocyanate are mixed.

Polyurethane foam foam using expanded cell expanded perlite of another closed cell according to the present invention is a polyol, a closed cell-shaped expanded perlite and isocyanate storage polyol storage tank, closed cell-shaped expanded perlite storage tank and isocyanate storage tank; And a mixing head in which the polyol, the closed cell expanded perlite, and the isocyanate reacted while being mixed by the polyol storage tank, the closed cell expanded perlite storage tank, and the metering feed pump individually connected to the rear end of the isocyanate storage tank. Characterized in that.

As described above, by mixing the expanded perlite of the closed cell with the polyurethane foam, it is possible to reinforce the thermal insulation, flame retardancy and mechanical properties of the foam, and problems in foaming and increase in thermal insulation of the foamed foam. there was.

1 shows a typical expanded perlite.
(A): more than 800㎛ (30 magnification) (B): 800 ~ 500㎛ (32 magnification)
(C): 500 ~ 400㎛ (32 magnification) (D): 400 ~ 250㎛ (48 magnification)
(E): 250 ~ 160㎛ (84 magnification) (F): 160 ~ 63㎛ (100 magnification)
(G): 63㎛ (100 magnification)
2 is a view showing an expanded perlite of the present invention.
(A): 400 μm or more (32 magnifications) (B): 400 to 250 μm (48 magnifications)
(C): 250 ~ 160㎛ (84 magnification) (D): 160 ~ 63㎛ (100 magnification)
(E): 63㎛ (100 magnification)
Figure 3 is a continuous manufacturing process diagram of the hollow perlite-polyurethane foam of the present invention.

Hereinafter, described in detail with reference to the accompanying drawings, preferred embodiments of the present invention.

The present invention is the role of calcite (CaCO3), clay, glass fiber and the vermiculite used to impart light weight and flame retardancy, heat resistance, and conventional expanded perlite, which has been previously used for the purpose of increasing the strength and strengthening strength, heat resistance and flame retardancy. Compensating for the disadvantages can have both effects, and additionally to produce a polyurethane foam that can prevent a decrease in thermal conductivity.

In order to explain the present invention in more detail, we will compare and compare the expanded perlite of the closed cell and the general expanded perlite and explain the effects.

Brief description of the general expanded perlite manufacturing method and characteristics are as follows.

Typically, perlite is classified as natural minerals such as pearl rock, pine rock, obsidian, and pumice, and also includes pumice with similar performance (hereinafter referred to as ore).

Ores vary in water content depending on the type, but contain moisture called crystal water.

The ore is pulverized to have an appropriate particle size distribution, which is selected according to the desired particle size of the expanded perlite.

When the raw ore thus prepared is adjusted to adjust internal crystallization water and subjected to a high temperature flame in the firing process, the surface is vitrified and the internal moisture vaporizes to produce expanded perlite.

The expanded perlite thus prepared has a foamed form having a cell therein. In the case of a general expanded perlite, the shape of the surface is opened or the inner cells are connected, and most of the expanded perlite includes an excessive amount of crushed particles generated during expansion. .

 However, the expanded perlite of the closed cell used in the present invention minimizes the occurrence of open cells while reducing the specific gravity as much as possible to make the shape of the hollow closed cell with no needle-like structure and strong particle strength on the surface of most of the expanded perlite.

First, in order to make hollow closed cell expanded perlite with no needle-like structure on the surface, drying is carried out to control over-expansion by controlling the amount of internal crystallization. It may be prepared to be.

On the other hand, if the amount of the crystallized water is too small, it will not expand or the expandability will fall, so the specific gravity of the particles increases, so the expansion should be adjusted by adjusting the weight percent of the crystallized water to the total weight of the ferrite.

In addition, the degree of control of the crystallization is different depending on the amount and characteristics of the crystallization of the ferrite ore, so it cannot be uniformly determined.

However, even if the weight percentage of the crystallized water is constant, in general, as the particle size of the ferrite becomes larger than 400 µm, the absolute amount of the crystallized water increases, so that the pressure increases when the crystallized water vaporizes, thereby destroying the surface. Many open cells occur.

Therefore, the wider the particle size distribution of the perlite crystallization in the manufacturing process, the more difficult it is to make the larger particles into closed cells.

In addition, particles of less than 63㎛ is easy to occur unexpanded phenomenon, the particles of less than 63㎛ of the present invention has a hollow shape, unlike the conventional perlite, it is significantly different in thermal conductivity or particle strength, and the thermal insulation performance The secured microparticles will play a rather desirable role as they will be of great help in filling the voids between the particles.

In this case, the expansion method used generally includes a direct flame method (the flame directly touches the raw material) or an indirect flame method (the flame does not touch the raw material). In addition, there is also a method of expanding by particle size, and mixing them to make the desired particle size distribution range.

Most of the expanded perlites produced by this method are formed in the form of a few cells inside the small particle size, and the larger the size of the perlite particle has a hollow closed cell shape with a stronger particle strength as a large number of cell aggregates The specific gravity can be expanded more lightly.

However, even with this approach, it is not possible to shape all of the expanded perlite into the shape of a completely hollow closed cell. Due to the characteristics of vertical and horizontal expansion furnaces that are generally used, about 10 to 30% of the particles may have some open cell shapes, and expanded perlites made of closed cell shapes may also be used during expansion or air transfer. Because of the impact, part of the surface may become an open cell, so that about 70 to 80% of the surface is a closed cell.

However, in the present invention, the range of the closed cell is not necessarily assumed to be applied by using a limited numerical value as described above. In the present invention, the expanded perlite of the closed cell means that the closed cell is included in the total expanded perlite by 50% by weight or more. If the content of the closed cell is more than 50% by weight because the effect is significantly better than the conventional expanded perlite.

The characteristics of the present invention described above are described in detail with reference to FIGS. 1 and 2 as follows.

That is, FIG. 1 is a view showing a scanning electron micrograph of a general expanded perlite, Figure 2 is a view showing a scanning electron micrograph of a hollow expansion perlite of a closed cell.

Referring to FIG. 1, the general expanded perlite generally shows the shape of a cell in which particles are opened, and many needles are formed on the surface, and (E) 250 μm or less includes fragments broken by over-expansion. It can be seen that the fragments increased by more than half, and the fragments smaller than (G) 63 µm or less had not even cells, and consisted of some expanded particles and unexpanded particles.

On the contrary, Figure 2 shows the expanded perlite of the present invention partially open cells are partially seen by the large particles of about 400㎛, which is actually limited to the surface, and the inner cells have individual independent cells, and almost no overexpansion crushed powder is included. Do not. Particularly, particles smaller than 63 mu m have mostly hollows.

Therefore, the general expanded perlite has a high specific surface area and at the same time the surface is open, and the particles are broken during mixing and high-pressure foaming, so that the polyol or isocyanate is absorbed or filled into the viscosity, and viscosity rise and aggregation occur. In addition, since the polyol and the isocyanate are designed to react at a constant ratio according to the conditions, if either is absorbed, the reaction under the designed conditions will not be formed, or unreacted substances will remain, causing shrinkage or deterioration of physical properties. This has the same effect in the case of expanded vermiculite having a plate-like structure or in the case of expanded graphite, since the surface is exposed. However, because the expanded perlite of the present invention has a hollow closed cell shape, the strength of the particles is high, the surface is closed, and this phenomenon is prevented.

In addition, unlike calcite, clay, glass fiber, etc., and has a light and hollow form, the dispersion efficiency on the urethane resin is increased to reinforce flame retardancy, heat insulation and mechanical properties. That is, generally, in order to mix and disperse the additives in the urethane resin, a process such as using an organic solvent or forced dispersion by ultrasonic waves is required. The hollow perlite of can be stored for a long time without absorbing the urethane resin without a separate process.

In addition, when the hollow perlite is applied to the water-foaming system, it exists on the high frequency of urea bonds formed between water and isocyanate, and acts as an intermediate binder between urea bonds, and serves as a buffer to prevent the bond from becoming overly hard. Can be done. In addition, by reducing the high foaming pressure generated in the urea bonds, the deforming is improved, the cell breakage can be easily prevented by the inter-foam between the foam cells.

In addition, the use of the expanded closed cell of the hollow closed cell of the present invention can prevent a decrease in thermal conductivity. In general, polyurethane foam has a lower thermal conductivity than other thermal insulators and thus has excellent thermal insulation performance, which is different depending on the type and density of polyurethane foam. However, in the same kind of polyurethane foam, the size of the cells inside thereof is small, and the larger the number, the lower the thermal conductivity. In general, inorganic fillers do not have a cell inside, so the thermal conductivity of the mixture is lowered. In general, the expanded inorganic material is less effective because the resin is absorbed from the surface and the cell is clogged or the cell is open. In contrast, the expanded perlite of the present invention has an independent foam cell therein as described in FIG. 2 and has a form of a hollow closed cell, thereby providing an independent cell effect to prevent a decrease in thermal conductivity.

The hollow perlite used in the present invention is not particularly limited in size, but has a particle size of 1 to 400 μm, preferably 1 to 140 μm (average particle diameter of 70 μm), and 1 to 200 μm of particle size (average particle size of 100 μm). Grade), with a specific gravity of 0.03 to 0.3 g / cm 3, preferably particles having a bulk density of 0.05 to 0.2 g / cm 3. If the specific gravity is less than 0.03 g / cm 3, there is a problem that the strength of the particles is sharply reduced. If the specific gravity is more than 0.3 g / cm 3, the thermal conductivity of the hollow perlite is increased.

In the particle size range, the lower the particle size of the hollow perlite, the higher the dispersibility and the heat insulation efficiency. However, the production of low particle size causes a problem due to the increase in the process cost and the failure rate for the expansion of the particles. In addition, since the hollow particles tend to form agglomerates such as some grape clusters at a maximum particle size of 400 µm or more, hollow perlite in the particle size range is effective in use.

The hollow perlite is used in the range of 1 to 50 parts by weight, preferably 1 to 30 parts by weight, based on 100 parts by weight of the total amount of polyol and isocyanate, and less than 1 part by weight has no reinforcing effect such as mechanical properties, flame retardancy, and thermal insulation. When the amount exceeds 50 parts by weight, foaming of the foam is suppressed, and problems such as mechanical properties are reduced by blocking chain linkage between urethane bonds, so it is preferable to maintain the above range.

In addition, by imparting functional groups such as silane coupling, titanium coupling, and zirconium coupling agents to the surface of the inorganic hollow perlite, the dispersibility and poly Increasing the bonding force with the urethane foam interface. Accordingly, when the foam is formed, the hollow perlite is filled inside the foam cell in an evenly dispersed state inside the foam, or positioned between the pore walls to serve as the foam cell and exist as a wall support. Accordingly, the thermal conductivity is reduced by increasing the independent bubble ratio, which is the basis of the insulation efficiency, and the flame retardancy, heat resistance, and mechanical properties may be further improved by the combination of the hollow perlite and the polyurethane foam which are the non-flammable filler.

The silane compound used in the present invention are silanes and combinations (combination), such as polydimethylsiloxane (Polydimethylsiloxane) various siloxane, yisook tilt rime silane (i -Octyltrimethoxysilane), such as. Organoalkoxysilanes are preferred reactive silanes because they are converted into siloxanes on the hollow perlite surface and filmed without yielding corrosive dispersions.

Preferred silane coupling agents consist of a combination of hydrophobic and hydrophilic silanes. The hydrophilic silanes lead to an increase in bonding strength with the polyurethane, and the hydrophobic silane groups provide inhibition of absorption on the polyol or isocyanate and improved dispersibility. Hydrophobic silanes include isooctyltrimethoxysilane ( i- Octyltrimethoxysilane), methyltrimethoxysilane, epoxycyclohexylethyltrimethoxysilane, and the like. Hydrophilic silane materials include aminopropyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, chloropropyltriethoxysilane, and the like. The use of the silane coupling is not particularly limited depending on the type, and may be selectively surface-treated using a single or two or more silane compounds.

Titanium coupling agents used in the present invention include titanium stearate complex, titanium organo phosphate complex, titanium acetyl acetonate, iso-butoxy titanium ethyl aceto acetate, di-iso-propoxy titanium bis ethyl aceto acetate, tetra isopropyl tita Nate, tetra normal butyl titanate, tetra ethyl nitanate and the like.

Zirconium coupling agents used in the present invention include neopentyl diaryl oxy trineodecanoyl zirconate, neopentyl diaryl oxy tridodecylbenzene-sulfonyl zirconate, neopentyl diaryl oxy tridioctyl phosphate zirconate Neopentyl diaryl oxy triaminophenyl zirconate, neopentyl diaryl oxy trimethacryl zirconate, neopentyl diaryl oxy triacryl zirconate, dinepentyl diaryl oxy diparamino benzoyl zirconate, etc. It includes.

Such a coupling agent is not particularly limited in the range of its use, and is preferably used in the range of 0.5 to 10 parts by weight based on 100 parts by weight of the hollow perlite, and less than 0.5 parts by weight does not exhibit a reinforcing effect such as an increase in interfacial bonding force, If it is 10 parts by weight or more, the effect increase is insignificant and the price is high, so the economic efficiency is poor, which is not preferable.

Next, the dispersion of the hollow perlite prepared above on the urethane resin is not particularly limited, but the hollow perlite is mixed and stirred on a premix of a foam stabilizer, a catalyst, a blowing agent, and other additives on a polyol, or is mixed with an isocyanate. The hollow perlite can be added and nitrogen purged to be used.

The polyol is a basic raw material that reacts with isocyanate to form a polyurethane, and is generally used in the art, and is not particularly limited. The polyol may be ethylene glycol, 1,2-propane glycol, 1,3-propylene glycol, butylene glycol. , 1,6-hexanediol, 1,8-octanediol, neopentylglycol, 2-methyl-1,3-propanediol, glycerol, trimenol propane, 1,2,3-hexanetriol, 1,2 , 4-butanetriol, trimethylolmethane, pentaerythritol, diethylene glycol, triethylene glycol, polyethylene glycol, tripropylene glycol, polypropylene glycol, dibutylene glycol, polybutylene glycol, sorbitol, sucrose, hydro Quinones, resorcinol, catechol, bisphenol or mixtures of two or more thereof; Polyether polyols prepared by polymerizing ethylene oxide, propylene oxide or mixtures thereof.

In addition, the polyol is phthalic anhydride or adipic acid; Polyester polyols prepared by polymerizing ethylene oxide, propylene oxide or mixtures thereof.

On the other hand, the isocyanate component to be reacted with the mixed polyol composition is not particularly limited to those used in the art, but specifically, crude-4,4'-diphenylmethane diisocyanate, 4,4'-diphenylmethane diisocyanate, Crude-2,6-toluene diisocyanate, 2,6-toluene diisocyanate, 2,4-toluene diisocyanate, etc. can be used.

Although the foaming agent composition of the present invention is not particularly limited to those used in the art, physical blowing agents such as cyclopentane-based or HFC compounds and chemical blowing agents, which are alternatively developed according to environmental problems, may be used.

Such physical blowing agents may optionally be used in the range of 8 to 50 parts by weight, preferably 8 to 30 parts by weight, relative to 100 parts by weight of the polyol, depending on the required density of the foam.

Water as a reaction promoter may serve as an auxiliary foaming agent, and in the case of a water-foaming system, water may be used alone as a blowing agent. At this time, 1 to 8 parts by weight based on 100 parts by weight of the polyol is preferred. When the amount of water used exceeds 8 parts by weight, the hard urea bond is excessively advanced, thereby reducing the adhesive strength with the adherend, and the heat aging of the polyurethane foam produced due to the excessive reaction heat may occur. The presence of carbon dioxide increases the thermal conductivity.

The reaction catalyst of the present invention is not particularly limited as it is used to promote the reaction with the resin and the foaming reaction and to adjust the reaction time to match the process characteristics. For example, triethylamine, tripropylamine, triisopropanolamine, tributylamine, trioctylamine, hexadecyldimethylamine, N-methylmorpholine, N-ethylmorpholine, N-octadecylmorpholine, monoethanolamine , Diethanolamine, dimethylethanolamine, triethanolamine, N-methyldiethanolamine, N, N-dimethylethanolamine, diethylenetriamine, N, N, N ', N'-tetramethylbutanediamine, N, N , N ', N'-tetramethyl-1,3-butanediamine, N, N, N', N'-tetraethylhexamethylenediamine, bis [2- (N, N-dimethylamino) ethyl] ether, N Formic acid and other salts of N'-dimethylbenzylamine, N, N-dimethylcyclohexylamine, N, N, N ', N', n'-pentamethyldiethylenetriamine, triethylenediamine, triethylenediamine, Of amino groups of the first and second amines, oxyalkylene adducts, azacyclic compounds such as N, N-dialkylpiperazines, and various N, N ', N'-trialkylaminoalkylhexahydrotriazines β Amine-based urethanization catalysts, such as an aminocarbonyl catalyst.

Such reaction catalysts may be used alone or in combination, and preferably 0.1 to 2.0 parts by weight, preferably 0.5 to 2.0 parts by weight, relative to 100 parts by weight of polyol. When the reaction catalyst is used in less than 0.1 part by weight, the physical properties of the foam is lowered due to the lowering of the reaction rate and the unreacted resin. If it exceeds 2.0 parts by weight, there may be no increase in reaction rate or increase in physical properties.

The foam stabilizer used in the present invention plays a role of generating a small and uniform cell by adjusting the internal pressure of the foamed cell, and polysiloxane ether, which is a silicone surfactant, is used.

Such foam stabilizer is preferably in the range of 0.1 to 2.0 parts by weight based on 100 parts by weight of the polyol. When the foam stabilizer is used at less than 0.1 part by weight, the independent bubbles are reduced to increase the thermal conductivity. When used in excess of 2.0 parts by weight, the hardness of the cell is reduced, thereby reducing the mechanical properties.

In addition, in preparing the polyurethane foam of the present invention, a crosslinking agent such as glycerin may be used in order to enhance the strength of the foam and shorten the curing time.

In the production of the polyurethane foam of the present invention, in order to reinforce the bending strength of the foam, cracks due to temperature changes, and the like, reinforcing fibers or nanoclays having a length of 3 to 30 mm may be used. As the reinforcing fiber, glass fiber, polyethylene fiber, polypropylene fiber, nylon fiber and the like can be used.

In addition, titanium oxide may be used to reduce the thermal conductivity. Titanium oxide can further lower the thermal conductivity by blocking radiant heat.

Flame retardants, antioxidants, ultraviolet absorbers, stabilizers, colorants and the like that are commonly used in the production of other polyurethane foams may be added as necessary.

The continuous production method of the expanded perlite-containing polyurethane of the present invention is the same as the conventionally provided method, but by partially changing the configuration of the foaming machine, productivity can be improved.

Polyurethane foam manufacturing method using the expanded perlite of the closed cell according to the present invention first to make a polyol mixture by mixing the expanded cell and the polyol of the closed cell shape, and then to transfer the polyol mixture and isocyanate to the mixing head to the polyurethane foam Alternatively, polyurethane foams may be prepared by individually transporting closed cell expanded perlites, polyols, and isocyanates to mixing heads.

Next, the polyurethane foam foaming machine using the expanded perlite of the closed cell by this invention is demonstrated.

Figure 3 illustrates one embodiment of a polyurethane foam foamer using the expanded perlite of a closed cell according to the present invention. As shown in FIG. 3, the polyurethane foam foamer using the expanded cell expanded perlite according to the present invention is a polyol stirred tank (1) in which a polyol and a closed cell expanded perlite are mixed, and an isocyanate stirred tank in which isocyanate is stored while being stirred. (2), at least one piston pump (5) connected to the polyol stirring tank (1), at least one cylinder pump (3) connected to the isocyanate stirring tank (2), the piston pump (5) and the cylinder pump And a mixing head 4 in which the polyol transferred by (3), the expanded cell-like expanded perlite and isocyanate react while being mixed.

Polyurethane foam foamer using the expanded closed cell expanded perlite according to the present invention is a polyol, a closed cell-shaped expanded perlite and an isocyanate storage tank, respectively, a closed cell-shaped expanded perlite storage tank and isocyanate storage tank, It may also comprise a metering feed pump and a mixing head in which they are mixed.

Specifically, as shown in FIG. 3, in the preparation of a polyurethane foam free of filler such as a closed cell expanded perlite, the polyol mixture (1) and the isocyanate compound (2) may be a cylinder pump (3). It is transferred to the mixing head 4 by using and discharged by high pressure. Reference numeral 6 denotes a mixing head and 7 denotes a discharge port.

However, in the case of the resin mixture in which the powdery filler is mixed, when the mixture is transferred to the cylinder pump, residual particles remain in the cylinder, thereby causing damage to the inner wall and reducing the conveying pressure and the conveying amount of the pump. In addition, due to the high pressure generated in the mixing head, the filler continuously impacts the inside of the head, causing breakage in the mixing head. Therefore, the transfer of the resin mixture uses a cemented piston pump (5) reinforced with strength, and the mixing head also uses cemented carbide, so that there are foaming machines that solve the occurrence of foreign matters, a reduction in pressure, and a breakage in the head. This has been applied in batch production, where a single suction of the pump is a single dose.

In the present invention, in order to form a continuous production of the urethane mixed with a filler in the form of powder, a double or more multi-piston pump was applied. The reason is that the piston pump improves the impossibility of conveying the resin when reversing to fill the piston in the piston, thereby allowing the pump to operate continuously after the first pump operation, thereby enabling continuous supply. As more than two pumps are added in multiple types, the nonuniformity caused by the pulsation phenomenon between the pumps is eliminated, so that continuous production is more stable.

In addition, a method of supplying a polyol compound, an isocyanate compound, and a powdery filler, respectively, by mixing in a foamer head is also possible. That is, a general foaming machine is supplied with each of the polyol compound and the isocyanate compound and mixed in the foaming machine head. When the powder filler supply line is further formed, the three foaming machines can be supplied while mixing the three.

EXAMPLES Hereinafter, the present invention will be described in detail, but the present invention is not limited to the examples.

Example 1

As shown in Table 1, 100 parts by weight of a polyol component mixture having an average OH value of 350 to 500 (40% of a polyol polymerized by adding propylene oxide / ethylene oxide to sorbitol and propylene oxide / ethylene oxide to pentaerythritol) 30% polyol polymerized by addition, 30% polyol polymerized by adding propylene oxide / ethylene oxide to sucrose), 0.5 parts by weight of water, 15.0 parts by weight of HCFC-141b and 0.3 parts by weight of tertiary amine catalyst mixture as blowing agent; 1.0 weight part of silicone foam stabilizers were mixed, and 10 weight part of closed cell expansion perlites of 70 micrometers of average particle diameters were mixed and stirred. Thereafter, 115 parts of the polymeric MDI having an NCO% of 30 to 32 were reacted to prepare a polyurethane foam insulation.

Example 2

The same procedure as in Example 1 was carried out, but the closed cell expansion perlite used was mixed with 10 parts by weight of an average particle diameter of 70 μm, and the surface coating was made of a hydrophobic coating using a silane coupling agent to prepare a polyurethane foam insulation.

Example 3

In the same manner as in Example 1, a polyurethane foam was prepared by mixing 10 parts by weight of a closed cell expanded perlite having an average particle diameter of 70 μm treated with a surface hydrophilic group with a silane coupling agent.

Example 4

In the same manner as in Example 1, a polyurethane foam was prepared by mixing 10 parts by weight of the closed cell expanded perlite having an average particle diameter of 100 μm.

Example 5

In the same manner as in Example 1, a polyurethane foam was prepared by mixing 10 parts by weight of a closed cell expanded perlite having an average particle diameter of 100 μm treated with a surface hydrophilic group with a silane coupling agent.

Example 6

In the same manner as in Example 1, a polyurethane foam insulation was prepared by mixing 10 parts by weight of a closed cell expanded perlite having an average particle diameter of 70 μm surface treated with a titanium coupling agent.

Example 7

In the same manner as in Example 1, a polyurethane foam insulation was prepared by mixing 10 parts by weight of a closed cell expanded perlite having an average particle diameter of 70 μm surface treated with a zirconium coupling agent.

Comparative Example 1

In the same manner as in Example 1, as shown in Table 1 to prepare a thermal insulation foam of polyurethane alone, containing no expanded perlite.

Comparative Example 2-3

In the same manner as in Example 1, the perlite used was a general perlite, not in the form of the expanded perlite of the present invention, particles having the characteristics as shown in Table 1 were used.

division Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 pole
Lee
All Sorbitol system 40 40 40 40 40 40 40 40 Pentaerythritol system 40 40 40 40 40 40 40 40 Shucro
OS 20 20 20 20 20 20 20 20 Tertiary Amine Catalyst 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 Polymeric MDI 115 115 115 115 115 115 115 115 foot
artillery
My water 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 HCFC
141b 15 15 15 15 15 15 15 15 Foaming agent One One One One One One One One Hollow
Fura
It Average
Particle size (㎛) 70 70 70 100 100 - 100 100 surface
process No treatment decimal
process Hydrophilic
process No treatment Hydrophilic
process - No treatment Hydrophilic
process Weight portion 10 10 10 10 10 - 10 10

The physical properties of the polyurethane foam prepared according to Example 1-5 and Comparative Examples 1-3 are shown in Table 2. Physical properties in Table 2 are determined as described below.

1.Free Foam Density: Density (Kg / m ³ ) of foam foam injected into the top open mold with internal dimensions 300X300X100mm

2. Thermal conductivity: measured at 20 ℃ using HC-074 (LaserComp) (ASTM C518)

3. Compressive strength: Measured by Lloyd's universal tester with 50X50X50mm specimen (KS M3831)

4. Bending strength: measured by Lloyd's universal testing machine with 300X75X50mm specimen (KS M3830)

5. Absorption amount: After dipping 100mmX100mmX25mm below 50mm from the water surface, take it out after 10 seconds, and leave it for 30 seconds in a wire mesh of 30mm inclined net scale for 30 seconds, measure the weight with a precision of 0.01g After absorbing for time, the weight is measured to calculate the absorbed weight to the reference weight.

division Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Free Foam Density
(Kg / ㎥) 32 32 32 33 34 30 47 45 Thermal conductivity
(Kcal / mh ℃) 0.0221 0.01220 0.0219 0.0218 0.0225 0.0210 0.0337 0.0281 Compressive strength
(Kg / cm2) 2.8 3.0 3.4 2.9 3.1 2.5 2.7 2.8 Flexural strength
(Kg / cm2) 4.8 4.9 5.6 4.8 5.2 4.5 2.9 3.2 Absorption amount
(g / 100㎠) 0.8 0.7 0.8 1.0 0.8 1.3 4.1 3.3

In Comparative Examples 2 and 3, the reaction did not proceed smoothly due to the absorption of polyol or isocyanate by general expanded perlite having a high specific surface area, and thus the free foaming density increased to 47 Kg / m 3, and the compressive strength was filled with the filling of inorganic perlite. Were all increased and the elastic force of the polyurethane foam itself was large, so there was no significant difference. The bending strength was decreased and the thermal conductivity was increased so that the size of the inner cell was irregularly increased and the shape was deteriorated.

On the other hand, as a result of comparing the mechanical strength of the expanded perlite of the present invention, the performance was not reduced compared to Comparative Example 1 used polyurethane foam alone, especially in the case of surface hydrophobic treatment showed 4.9 Kg / ㎠ flexural strength , Hydrophilic treatment showed 5.6 Kg / ㎠, which showed higher mechanical strength than hydrophobic treatment. This indicates that the reaction with the isocyanate is formed by the amino group used as the hydrophilic group in the polyurethane formation reaction, thereby increasing the interfacial adhesion to show high mechanical strength.

In addition, unlike the comparative example, in the case of using the closed cell perlite, there was no sharp increase in foam density, but the reason for the increase was due to the increase in weight due to the addition of expanded perlite.

As a result of measuring the absorption rate, the absorbed amount of the expanded foam prepared due to the high absorbency of the general expanded perlite was sharply increased compared to Comparative Example 1 without the perlite, but Comparative Example 2 was subjected to the surface treatment, the value was lowered. When the closed cell expansion perlite is used, the absorption rate is lower than that of the polyurethane foam alone. It can be seen that the closed cell expansion perlite has an effect of blocking moisture transfer into the polyurethane foam.

As a result, the addition of closed cell expansion perlite overcomes the problems of conventional open expansion perlites, namely polyurethane foam formation due to absorption of polyols or isocyanates with high specific surface area and dispersibility problems in foam production. It is possible to produce a foam with improved mechanical properties and low water absorption rate without lowering the foaming force.

Example 8

As shown in Table 3, 100 parts by weight of the mixed polyol component having an average OH value of 350 to 500 (60% sucrose polyol, 40% sorbitol polyol), 5 parts by weight of crosslinking agent, 3.5 parts by weight of water, and 1.0 part by weight of the tertiary amine catalyst mixture and 1.5 parts by weight of the silicon foam stabilizer were mixed, and 10 parts by weight of the closed cell expanded perlite having an average particle diameter of 70 µm was mixed and stirred. Thereafter, 165 parts of polymeric MDI having an NCO% of 30 to 32 were reacted to prepare a water-foamed polyurethane foam insulation.

Example 9

The same procedure as in Example 8 was carried out, but the closed cell expansion perlite used was mixed with 10 parts by weight of an average particle diameter of 70 μm, and the surface coating was made of a polyurethane foam insulation by performing hydrophobic coating using a silane coupling agent. .

Example 10

In the same manner as in Example 8, a polyurethane foam was prepared by mixing 5 parts by weight of a closed cell expanded perlite having an average particle diameter of 70 μm treated with a surface hydrophobic group with a silane coupling agent.

Example 11

The same procedure as in Example 8 was carried out, but a polyurethane foam was prepared by mixing 10 parts by weight of an average particle diameter of 70 μm closed cell expansion perlite treated with a surface hydrophilic group with a silane coupling agent.

Example 12

In the same manner as in Example 8, a polyurethane foam was prepared by mixing 5 parts by weight of a closed cell expanded perlite having an average particle diameter of 70 μm treated with a surface hydrophilic group with a silane coupling agent.

Example 13

The same procedure as in Example 8 was carried out, but a polyurethane foam was prepared by mixing 10 parts by weight of the closed cell expanded perlite having an average particle diameter of 100 μm.

Example 14

In the same manner as in Example 8, a polyurethane foam was prepared by mixing 5 parts by weight of a closed cell expanded perlite having an average particle diameter of 100 μm treated with a surface hydrophobic group with a silane coupling agent.

Example 15

In the same manner as in Example 8, a polyurethane foam was prepared by mixing 10 parts by weight of a closed cell expanded perlite having an average particle diameter of 100 μm treated with a surface hydrophilic group with a silane coupling agent.

Example 16

In the same manner as in Example 8, a polyurethane foam was prepared by mixing 5 parts by weight of a closed cell expanded perlite having an average particle diameter of 100 μm treated with a surface hydrophilic group with a silane coupling agent.

Comparative Example 4

In the same manner as in Example 8, as shown in Table 3 to prepare a polyurethane sole insulation foam containing no closed cell expansion perlite.

Comparative Example 5-6

In the same manner as in Example 8, the perlite used was a general expanded perlite as shown in Figure 1, not in the form of the expanded perlite of the present invention, particles having the characteristics as shown in Table 3.

division Example 8 Example 9 Example 11 Example 13 Example 15 Comparative Example 4 Comparative Example 5 Comparative Example 6 Polyol A 40 40 40 40 40 40 40 40 Polyol B 60 60 60 60 60 60 60 60 Cross-linking agent 5 5 5 5 5 5 5 5 catalyst 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Polymeric MDI 165 165 165 165 165 165 165 165 water 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 Foaming agent 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 Average
Particle size (㎛) 70 70 70 100 100 - 100 100 surface
process No treatment decimal
process Hydrophilic
process No treatment Hydrophilic
process - No treatment Hydrophilic
process Weight portion 10 10 10 10 10 - 10 10

The physical properties of the polyurethane foam prepared according to Example 8-15 and Comparative Example 4-6 are shown in Table 4.

division Example 8 Example 9 Example 11 Example 13 Example 15 Comparative Example 4 Comparative Example 5 Comparative Example 6 Free Foam Density
(Kg / ㎥) 34 33 34 35 35 32 47 48 Thermal conductivity
(Kcal / mh ℃) 0.0242 0.0245 0.0242 0.0245 0.0248 0.0240 0.0398 0.0387 Compressive strength
(Kg / cm2) 2.4 2.4 2.8 2.2 2.4 1.8 2.2 2.4 Flexural strength
(Kg / cm2) 3.3 4.0 4.7 3.6 3.8 3.0 2.1 2.3 Absorption amount
(g / 100㎠) 0.9 0.8 0.9 1.1 0.9 1.5 4.4 3.6

As shown in Table 4, Comparative Example 4 exhibited a free foaming density of 32 Kg / ㎥, and compared with Comparative Example 1, the mechanical properties such as increase in thermal conductivity and compressive strength and flexural strength were reduced. This is a result of the decrease in mechanical properties and the increase in thermal conductivity due to the rapid progress of the urea reaction, which is a problem of the water-foaming system.

In addition, in the case of Comparative Examples 5 and 6, the reaction was not progressed smoothly due to the absorption of polyol or isocyanate by general expanded perlite having a high specific surface area, and thus the free foaming density increased to 48 Kg / m 3. Compressive strength was increased, but bending strength was decreased, and thermal conductivity was also decreased.

However, in Example 1 to Example 15 and Comparative Example 4, in the case of using the hollow perlite in Example 8 and Comparative Example 1 in the case of using the hollow perlite of Example 5 and Comparative Example 1, the thermal conductivity rise is smaller. It can be expected that this helped to make the shape of the cell more uniform when foaming in the water-foaming system.

In addition, when the foam was manufactured using hollow perlite having an average particle diameter of 70 μm as in Example 11, a decrease in foam density was hardly generated compared to Comparative Example 4, and mechanical properties were increased.

As a result, the addition of closed cell expansion perlite stabilizes the rapid urea bond in the case of water-foaming system, thereby increasing the foaming pressure and hardening of the surface to increase mechanical properties such as compressive strength, and improve deforming. It can play a role. In addition, it is possible to perform a role of reinforcing the thermal conductivity of the foam cell by the carbon dioxide with low thermal insulation efficiency.

Example 17

In the same manner as in Example 5, the polyurethane foam was prepared by mixing 5 wt% by weight of the enemy and 20 wt% by weight of the content of the closed cell expanded perlite.

Example 18

In the same manner as in Example 17, 20 parts by weight of the content of the closed cell expansion perlite was mixed to prepare a polyurethane foam.

Example 19

The same procedure as in Example 17 was carried out, but the polyurethane foam was prepared by mixing 30 parts by weight of the content of the closed cell expanded perlite.

Comparative Example 7

In the same manner as in Comparative Example 3, but was prepared by mixing 5wt% by weight, the content of the general expansion perlite by 20wt% by weight of the polyurethane foam.

Comparative Example 8

To carry out the same as in Comparative Example 7, a polyurethane foam was prepared by mixing 20 parts by weight of a general expanded perlite content.

Comparative Example 9

The same procedure as in Comparative Example 7 was carried out, but a polyurethane foam was prepared by mixing 30 parts by weight of a general expanded perlite content.

In order to confirm the flame retardant performance of the polyurethane foams prepared according to Examples 17-19 and Comparative Examples 7-9, the total calorific value was measured.

1. Flame retardancy: Measure the total heat released by conducting 5 minutes with cone calorimeter (KS F ISO 5660-1)

division Example 17 Example 18 Example 19 Comparative Example 7 Comparative Example 8 Comparative Example 9 Average particle diameter
(Μm) 70 70 70 100 100 100 Purite
wt% parts by weight 10 20 30 10 20 30 Total emission heat
(MJ / ㎡) 7.6 5.8 4.5 15.3 8.6 7.1

In the case of the total heat of emission by the cone calorimeter method, it can be seen that the flame retardancy increases as the total heat of heat is lowered as the content of the ferrite increases as in Example 17-19 and Comparative Example 7-9.

However, looking at the heat release compared to the content of the perlite contained, when mixing 30 parts by weight of the general expansion perlite as shown in Comparative Example 9 showed a heat release of 7.1 MJ / ㎡, while the release of Example 18 using 20 parts by weight of the hollow perlite The heat showed lower emission heat of 5.8 MJ / m 2. This is because the hollow particles have excellent dispersion efficiency inside the foam and at the same time, due to the increase in adhesion to the foam by the surface treatment, the carbonized layer formation efficiency due to the hollow perlite increases during carbonization, so that the flame retardant effect is high even in a small amount. It is shown.

Next, the effects of physical properties on the content of closed cells in expanded perlite are examined.

Table 6 below shows the results of measuring the thermal conductivity and the water absorption of each of the expanded perlite having the closed cell form of 70% by weight (A), 50% by weight (B), and 30% by weight (C) of the total expanded perlite weight. .

The thermal conductivity was filled and sealed by inserting each perlite into a mold having a width X length X height 300X300X50mm, and measured at 20 ° C. using a flat plate heat flow method. The water absorption rate was put in a funnel equipped with a paper filter. Then, 100 ml of water was slowly added, and the absorption rate was calculated from the amount discharged downward.

Comparison of Properties by Weight of Closed Cell Expansion Perlite division Thermal Conductivity (W / mK) Water absorption (%) A (70% of closed cells) 0.034 18.4 B (50% by weight of closed cells) 0.036 26.5 C (30% by weight of closed cells) 0.047 48.7

In the above result, when the closed cell is 30 wt% or less, the thermal conductivity of the expanded perlite itself is high, resulting in poor thermal insulation performance. The water absorption rate is 48% or more, and when mixed with the liquid resin, the resin is excessively absorbed, resulting in poor efficiency. Since the resin remains on the substrate, the thermal conductivity rises.

On the other hand, when the closed cell is 50% by weight or more, it has a lower thermal conductivity than the closed cell 30%, the water absorption is also low, the increase in the efficiency and thermal conductivity of the resin is suppressed. It can be seen that 70% by weight of closed cells have lower thermal conductivity and moisture absorption.

As a result, the closed cell weight percentage, in which the closed cell expansion perlite exhibits excellent thermal conductivity and low water absorption, is 50% by weight or more relative to the total expansion perlite.

Although the embodiments, in particular structural forms and the like have been described, these are not suggesting the scope thereof, and those skilled in the art to which the present invention pertains know that modifications can be made without departing from the principles of the present invention. Can be.

1: Polyol Stirring Tank
2: isocyanate stirring tank
3: cylinder pump
5: piston pump
6: mixing head
7: discharge port

Claims (17)

A polyurethane foam using a closed cell expanded perlite, characterized in that the surface comprises a closed cell-shaped expanded perlite to which at least one coupling agent selected from silane coupling agent, titanium coupling agent and zirconium coupling agent is applied. The method of claim 1 ,
The closed cell expanded perlite is a polyurethane foam using a closed cell expanded perlite, characterized in that it has a bulk density (Bulk Density) of 0.03 ~ 0.3g / cm 3 range. The method of claim 1,
The closed cell-expanded perlite is polyurethane foam using a closed cell-expanded perlite, characterized in that it comprises at least 50% by weight relative to the total weight of the expanded perlite. delete The method of claim 1,
The coupling agent is a polyurethane foam using the expanded perlite of the closed cell, characterized in that it is used in a ratio of 0.5 to 10% by weight relative to 100% by weight of the expanded cell perlite of the closed cell shape. The method of claim 1,
The silane coupling agent is composed of a combination of hydrophobic silane and hydrophilic silane, and the hydrophobic silane is isooctyltrimethoxysilane ( i -Octyltrimethoxysilane), methyltrimethoxysilane, epoxycyclohexylethyltrimethoxysilane (Epoxycyclohexylethyltrimethoxy silane ), And the hydrophilic silane is any one or more of aminopropyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, and chloropropyltriethoxysilane. Polyurethane foam using the expanded perlite of the closed cell characterized by. The method of claim 1,
The titanium coupling agent is a titanium stearate complex, a titanium organo phosphate complex, titanium acetyl acetonate, iso-butoxy titanium ethyl aceto acetate, di-iso-propoxy titanium bis ethyl aceto acetate, tetra isopropyl titanate, tetra normal Polyurethane foam using expanded perlite of a closed cell, characterized in that any one or more of butyl titanate, tetra ethyl nitanate. The method of claim 1,
The zirconium coupling agent is neopentyl diaryl oxy trineodecanoyl zirconate, neopentyl diaryl oxy tridodecylbenzene-sulfonyl zirconate, neopentyl diaryl oxy tridioctylphosphate zirconate, neopentyl dia Any one or more of aryl oxy triaminophenyl zirconate, neopentyl diaryl oxy trimethacryl zirconate, neopentyl diaryl oxy triacryl zirconate, dinopentyl diaryl oxy diparamino benzoyl zirconate Polyurethane foam using the expanded perlite of the closed cell characterized by. The method of claim 1,
The polyurethane foam is a polyurethane foam using expanded perlite of a closed cell, characterized in that it further comprises any one or more of a flame retardant, antioxidant, ultraviolet absorber, stabilizer, colorant. The method of claim 1,
The polyurethane foam is a polyurethane foam using expanded perlite of a closed cell, characterized in that it further comprises one or more selected from nanoclay, glass fiber, titanium oxide powder. It is prepared by mixing 1 to 50% by weight of a closed cell-expanded perlite in which at least one coupling agent selected from a silane coupling agent, a titanium coupling agent, and a zirconium coupling agent is given to the surface based on 100% by weight of the total amount of the polyol and isocyanate mixture. Polyurethane foam manufacturing method using the expanded perlite of the closed cell. 12. The method of claim 11,
The polyol may be ethylene glycol, 1,2-propane glycol, 1,3-propylene glycol, butylene glycol, 1,6-hexanediol, 1,8-octanediol, neopentyl glycol, 2-methyl-1,3- Propanediol, glycerol, trimenyl propane, 1,2,3-hexanetriol, 1,2,4-butanetriol, trimethylolmethane, pentaerythritol, diethylene glycol, triethylene glycol, polyethylene glycol, tri Propylene glycol, polypropylene glycol, dibutylene glycol, polybutylene glycol, sorbitol, sucrose, hydroquinone, resorcinol, catechol, bisphenol or a mixture of two or more thereof; Characterized in that the polyether polyol prepared by polymerizing ethylene oxide, propylene oxide or a mixture thereof,
Polyurethane foam manufacturing method using expanded perlite in a closed cell. The method of claim 11,
The isocyanate is crude 4,4'-diphenylmethane diisocyanate, 4,4'-diphenylmethane diisocyanate, crude-2,6-toluene diisocyanate, 2,6-toluene diisocyanate, and 2, A method for producing a polyurethane foam using expanded perlite in a closed cell, characterized in that any one or more of 4-toluene diisocyanate. The method of claim 11,
Polyurethane foam using a closed cell expanded perlite, characterized in that to form a polyol mixture by mixing the closed cell-expanded perlite and the polyol, and to transfer the polyol mixture and the isocyanate to a mixing head to produce a polyurethane foam Manufacturing method. The method of claim 11,
Polyurethane foam manufacturing method using the expanded perlite of the closed cell expanded perlite, the polyol, and the isocyanate, respectively, to the mixing head to produce a polyurethane foam. Polyol stirred tank in which the polyol and the surface are mixed with a closed cell-expanded perlite endowed with at least one coupling agent selected from a silane coupling agent, a titanium coupling agent and a zirconium coupling agent,
Isocyanate stirring tank in which isocyanate is stored while stirring,
A plurality of piston pumps connected to the polyol stirring tank,
At least one cylinder pump connected to the isocyanate stirring tank,
Polyurethane foamed by the piston pump and the cylinder pump, a closed cell expansion perlite and isocyanate is mixed with the mixing head is a polyurethane foam foamer using an expanded perlite of the closed cell, characterized in that it comprises a mixing head. Polyols, polyol storage tanks each containing a closed cell expanded perlite and isocyanate, each of which is given a silane coupling agent, a titanium coupling agent, a zirconium coupling agent, and a polyol storage tank, a closed cell expanded perlite storage tank, Isocyanate storage tanks,
The polyol storage tank, the closed cell-shaped expansion perlite storage tank and the mixing head which is reacted while mixing the polyol, closed cell-shaped expansion perlite and isocyanate conveyed by a metered feed pump individually connected to the rear end of the isocyanate storage tank Polyurethane foam foaming machine using an expanded perlite of a closed cell.

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