KR101547934B1 - Inorganic binder composition for hard-core panel - Google Patents

Abstract

The present invention relates to an inorganic binder composition for a hard core panel which is capable of providing lightweight hard core panels for shipbuilding, while simultaneously improving water resistance and flexibility. More specifically, the present invention is characterized by comprising 50 to 94 parts by weight of liquid silicate, 5 to 30 parts by weight of nano silica, 0.5 to 10 parts by weight of a Li-based additive, and 0.5 to 10 parts by weight of a silane compound.
The hard core panel produced by curing the inorganic binder composition of the present invention is provided with light weight, water resistance, and flexibility, thereby providing a hard core panel for a ship interior.

Description

Technical Field [0001] The present invention relates to an inorganic binder composition for a hard core panel,

The present invention relates to an inorganic binder composition for a hard core panel having improved water resistance and flexibility as a lightweight panel for ships.

The shipboard panel should have sufficient strength and thermal resistance as the material used for the sidewalls and partition walls of the accommodation area, and should have good workability in construction. Particularly, the ceiling, side wall and partition wall should be installed to withstand the vibration or agitation of the ship, and the surrounding wall or floor of the living quarters may be painted with steel, but in general, Deck Covering construction at the bottom, lining material and furniture of the residence area should be given sufficient caution when using wood-based materials.

The magnesium board, calcium silicate board, and fiber reinforced cement board, which are fireproof boards used for construction on the land, have a specific gravity of 1.0 ~ 1.2, which is heavier than the specific gravity of 0.45 required by the ship and is very unsuitable as a material to lighten the ship. Therefore, it is necessary to develop a nonflammable panel that is light in weight and satisfies the strength, soundproofing, and nonflammability required by the ship and has price competitiveness. Furthermore, unlike ordinary interior interiors, it is necessary to reduce the weight of interior materials in consideration of the propulsion performance, restoration performance, and economic performance of the ship. In addition, It should be a material that can satisfy both the strength to withstand deformability and the secondary workability (tapping) according to actual construction. Especially, in case of a ship having a luxury residence space such as a yacht or a cruise ship, a large amount of hard core panel is used in the interior of a residence, but it depends on imports. In Korea, only a soft core panel used in commercial ships is developed and used have.

In addition, since the rooms of the restroom and the passenger ship installed in the cabin of the ship have many complicated details such as piping and wiring, it is difficult to install the boat on the ship in a complicated structure and in a poor environment. And room are put in place of ship and are assembled as it is assembled. In the case of a unit using a soft core panel, the wall of the unit uses a cross-section panel in which a 0.6 mm laminated steel sheet is bonded to a soft core glass fiber, which is structurally weak due to an asymmetric structure. The width can not be more than 500mm ~ 600mm. When the glass fiber is replaced with a hard core, the structural weakness can be improved to widen the width of the panel from 1000 mm to 1200 mm and the thickness of the panel can be reduced to more than half of the soft core panel, Since hard core is manufactured only with pure inorganic material, it can be recycled 100%, contributing to resource recycling and energy saving, and also used as a material for cruise ship panel which mainly uses hard core panel when it is dried in Korea .

However, most of the inorganic components constituting the hard core panel are made of a hydrophilic material, so that it is easy to absorb moisture during use, which causes deterioration of physical properties. Therefore, it is necessary to improve the water resistance and the strength of the inorganic material is high, It is required to develop an inorganic binder that simultaneously satisfies water resistance and flexibility in a hard core panel for a ship interior.

Patent Application No. 10-2012-0082267

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide an inorganic binder composition capable of providing a lightweight hard core panel for a vessel, and improved water resistance and flexibility at the same time.

According to an aspect of the present invention, there is provided a hard core comprising a mixture of 50 to 94 parts by weight of a liquid silicate, 5 to 30 parts by weight of nano silica, 0.5 to 10 parts by weight of a Li-based additive and 0.5 to 10 parts by weight of a silane compound. To an inorganic binder composition for a panel.

Preferably, in the present invention, the liquid silicate comprises 76.0 to 80.0% by weight of Si, 19.6 to 23.0% by weight of Na, 0.15 to 0.35% by weight of K, 0.2 to 0.3% by weight of Al and 0.05 to 0.15% .

Preferably, in the present invention, the Li-based additive is at least one selected from the group consisting of lithium carbonate, lithium hydroxide, lithium silicate, and lithium sulfate.

Also preferably, in the present invention, the silane compound is at least one compound selected from the group consisting of tetraethoxysilane, methyltriethoxysilane, sodium methylsiliconate, methyltrimethoxysilane, potassium methylsiliconate, butyltrimethoxysilane and vinyltrimethoxy Silane, and silane.

Preferably, in the present invention, the composition further comprises an inorganic additive or a curing agent. More preferably, the inorganic additive is selected from the group consisting of inorganic filler selected from perlite or vermiculite, mica, aluminum silicate and calcium silicate ≪ RTI ID = 0.0 > and / or < / RTI > In addition, the curing agent can improve the hardness and strength at the time of curing of the inorganic binder, and is characterized by further comprising at least one curing agent selected from the group consisting of potassium hydroxide, potassium carbonate, sodium phosphate and sodium sulfate.

According to the present invention, a lightweight hard core panel for a ship is manufactured by curing the inorganic binder composition of the present invention. In order to solve the problem of a decrease in water resistance due to a hydrophilic material, It is possible to provide a hard core panel having improved water resistance, strength and flexibility.

In addition, since the hard core panel made of the inorganic binder composition of the present invention is made of pure inorganic material, it is possible to recycle completely and contribute to resource recycling and energy saving.

FIG. 1 shows the hydrophobicity of a hard core panel surface prepared using an inorganic binder manufactured according to an embodiment of the present invention.
2 shows electron microscopic analysis results of pearlite used as an inorganic additive.
Fig. 3 shows electron microscopic analysis results of aluminum silicate (a), mica (b), vermiculite (c) and calcium silicate (d) used as inorganic additives.

Hereinafter, the present invention will be described in detail.

According to one aspect of the present invention, there is provided an inorganic binder for a hard core panel, which comprises 50 to 94 parts by weight of liquid silicate, 5 to 30 parts by weight of nano silica, 0.5 to 10 parts by weight of a Li-based additive and 0.5 to 10 parts by weight of a silane compound A composition is provided.

The liquid silicate according to the present invention is characterized by containing 76.0 to 80.0% by weight of Si, 19.6 to 23.0% by weight of Na, 0.15 to 0.35% by weight of K, 0.2 to 0.3% by weight of Al and 0.05 to 0.15% by weight of Fe do.

In the present invention, the nanosilica is a silicon dioxide (SiO 2) particle having a nanometer size particle and structure. The nanosilica improves the strength by increasing the content of Si, It is possible to improve the water resistance and the water repellency. When the amount of the nano-silica is less than 5 parts by weight, it is difficult to impart the water resistance required by the present invention. When the amount of the nano-silica exceeds 30 parts by weight, the flexibility of the inorganic binder is lowered, , It is preferable to include 5 to 30 parts by weight.

In the present invention, the Li-based additive is at least one selected from the group consisting of lithium carbonate, lithium hydroxide, lithium silicate, and lithium sulfate. The Li-based additive is complementary to the Na ion in the liquid silicate (mixed alkali effect) The chemical durability of the inorganic binder can be improved, and the water resistance can be improved. If the amount of the Li-based additive is less than 0.5 parts by weight, it is difficult to impart the water resistance required by the present invention. If the amount exceeds 10 parts by weight, the chemical durability and water resistance It is preferable to include 0.5 to 10 parts by weight.

In the present invention, the silane is the simplest silicon monomer, and has the organic functional group that chemically bonds with the organic material in the same molecule, and the hydrolyzate capable of reacting with the inorganic material, and can function to bind the organic material and the inorganic material. As a result, the inorganic binder composition of the present invention improves the mechanical strength and water resistance of the composition to improve the quality of the inorganic binder composition, thereby imparting hydrophobicity to the hard core panel obtained by curing the inorganic binder composition by the surface coating effect.

Therefore, it is preferable to use at least one member selected from the group consisting of tetraethoxysilane, methyltriethoxysilane, sodium methylsiliconate, methyltrimethoxysilane, potassium methylsiliconate, butyltrimethoxysilane and vinyltrimethoxysilane . In this case, the silane compound is included in an amount of 0.5 to 10 parts by weight. When the amount of the silane compound is less than 0.5 parts by weight, the hydrophobic property and water resistance required for the inorganic binder composition of the present invention can not be imparted. If the amount exceeds 10 parts by weight, the cost of the inorganic binder increases, This is because the physical properties of the composition may be lowered.

In the present invention, the composition may further include an inorganic additive or a curing agent. By further including an inorganic additive, it is possible to impart the strength and flexibility required for the lightweight hard core panel, and the hardness and strength of the inorganic binder can be improved by the curing agent.

As the inorganic filler, pearlite or vermiculite plays a role of lowering the specific gravity of the panel when the hard core panel is manufactured, and at the same time, it becomes a main component of the panel, and thus a lightweight hard core panel can be manufactured. In particular, pearlite is a lightweight filler with a low specific gravity which is a micro-hollow spherical micro-hollow sphere. It is processed by high-temperature foaming by a special heat treatment method after processing the igneous rock produced by volcanic eruption into fine particles, It can be easily mixed with other materials because it has excellent flowability when mixed with other materials. In the case of vermiculite, it has not only low specific gravity but also swells in hot forming process, It becomes possible to control.

Further, the strength reinforcing agent is composed of particles having fine grains, fine particles, needle-like particles or the like, which have a high specific gravity and a small amount of water absorption. Therefore, at the time of manufacturing the hard core panel, The strength of the panel can be improved by filling the space between the panels. However, since the strength reinforcing agent itself has a high specific gravity, it is necessary to add the hardener core in an appropriate ratio at the time of manufacturing the hard core panel, so that a lightweight hard core panel can be provided.

The inorganic filler or the inorganic additive including the strength reinforcing agent tends to be aggregated when blended with the inorganic binder, and the blend should be determined in consideration of blending timing, blending amount, and miscibility with an inorganic binder. Therefore, in order to maintain the light weight without causing an increase in the specific gravity while showing the effect of supplementing the strength by the addition, the inorganic filler preferably further comprises 1 to 15 parts by weight based on the total weight of the inorganic binder composition, It is preferable that the binder composition further comprises 1 to 10 parts by weight based on the total weight of the binder composition.

The curing agent is preferably at least one selected from the group consisting of potassium hydroxide, potassium carbonate, sodium phosphate and sodium sulfate. The curing agent may improve the hardness and strength of the inorganic binder when it is cured. However, when the amount of the inorganic binder is too high, the inorganic binder has a high affinity for water, thereby lowering the water resistance of the inorganic binder. .

In the present invention, the composition is cured to produce a hard core panel, wherein the hard core panel is a lightweight hard core panel for a ship.

Hereinafter, the present invention will be described in detail with reference to examples, but the scope of the present invention is not limited thereto.

≪ Example 1 > Production of liquid silicate constituting inorganic binder

When the Si content in the inorganic binder rises, there is an effect of increasing the hardness and strength at the time of curing. However, since the properties such as viscosity, flexibility, inorganic binder solid content and workability of the resin are reduced, , The solubility of water increases, and the properties of the inorganic binder are good. Physical properties such as strength and hardness are lowered.

In this example, liquid silicate (Eskemec Co., Ltd., Korea) was prepared in consideration of the above physical properties and the components thereof were analyzed by XRF analysis.

Ingredients Company A  Example 1-1 Examples 1-2 Si 82.388 79.791 76.757 Na 16.812 19.707 22.388 K 0.186 0.174 0.339 Al 0.291 0.245 0.235 Fe 0.323 0.082 0.121

As shown in Table 1, the liquid silicate which is currently used in commercial use and the liquid silicate prepared in this embodiment have no significant difference in the constituents but the composition of the constituents is somewhat different.

≪ Example 2 > Water resistance change of inorganic binder by addition of additives

2-1 Water Resistance Change of Inorganic Binder by Adding Li Additive

An additive containing Li as a main component was added to the liquid silicate prepared in Example 1-1 to synthesize an inorganic binder, and then the water resistance change was tested. Specifically, the inorganic binder was dried only with an inorganic binder, and immersed in water for 48 hours to observe the amount (%) of the remaining inorganic binder, thereby confirming the change in water resistance of the inorganic binder. The test results are shown in Table 2 below.

Ingredients Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Liquid silicate 95 90 85 80 75 Li additive 5 10 15 20 25 Distilled water 10 10 10 10 10 system 110 110 110 110 110 Binder remaining rate after water resistance test (%) 0 5 45 65 80

2-2 Water Resistance Change of Inorganic Binder by Addition of Nanosilica

After the inorganic binder was synthesized by injecting liquid nano silica in which silica particles having nano size were dispersed, the water resistance change was tested by the same method. The test results are shown in Table 3 below.

Ingredients Sample 6 Sample 7 Sample 8 Sample 9 Sample 10 Liquid silicate 95 90 85 80 75 Nano silica 5 10 15 20 25 Distilled water 10 10 10 10 10 system 110 110 110 110 110 Binder remaining rate after water resistance test (%) 12 22 36 40 5

2-3 Water Resistance Change of Inorganic Binder by Addition of Alkoxysilane

After alkoxysilane was added to synthesize an inorganic binder, the water resistance change was tested by the same method. The test results are shown in Table 4 below.

Ingredients Sample 11 Sample 12 Sample 13 Sample 14 Liquid silicate 97.5 95.0 92.5 90 Alkoxysilane 2.5 5.0 7.5 10.0 Distilled water 10 10 10 10 system 110 110 110 110 Binder remaining rate after water resistance test (%) 0 2.8 3.3 19.5

The results of the second embodiment will be described as follows.

First, in order to improve the water resistance of the inorganic binder, an additive containing Li as a main component, nanosilica and alkoxysilane were added to synthesize an inorganic binder and water resistance was tested. As a result, when an additive containing lithium as a main component was added, As shown in FIG. 2, it was confirmed that the water resistance improves the residual ratio of the binder remarkably as the content of the Li additive increases, and the water resistance is improved.

In the case of an inorganic binder synthesized by injecting liquid nano silica in which nano-sized silica particles are dispersed, as shown in Table 3, the amount of silicon constituting the inorganic binder (Sample 6 to Sample 9) The water resistance was improved by increasing the content, but it was confirmed that the water resistance was lower in the case of the fixed amount (Sample 10). This is thought to be due to the presence of excess silica particles, which hinders the curing of the inorganic binder. It is also believed that excess nanosilica is not sufficiently reacted during the synthesis of inorganic binders.

In the case of an inorganic binder synthesized by introducing alkoxysilane, as shown in Table 4, it does not greatly contribute to the improvement of the water resistance of the inorganic binder, but when the content of the alkoxysilane is more than 10% by weight Sample 14) also showed improved water resistance.

In addition, as a result of producing a hard core panel using an inorganic binder prepared by adding an alkoxysilane, as shown in FIG. 1, it has been shown that hydrophobic properties are imparted to the surface of the hard core panel, It is confirmed that the hard core panel can greatly contribute to the improvement of the initial water resistance of the hard core panel.

≪ Example 3 > Inorganic additives for improvement of physical properties of incombustible, lightweight hard core panel

3-1 Characterization of Inorganic Additives

(1) The shapes of pearlite, vermiculite, mica, calcium silicate and aluminum silicate used as inorganic additives for incombustible and lightweight hard core panels were analyzed by an electron microscope (SEM: S-2400, HITACHI) 2 and Fig.

(2) The apparent specific gravity of the inorganic additive was measured in accordance with the KS M ISO 787-5 standard. The results are shown in Table 5 below.

Additive name Apparent specific gravity Water absorption (g / 100g) Pearlite A 0.057 400 Pearlite B 0.173 240 Pearlite C 0.101 200 Pearlite D 0.106 200 Aluminum silicate 0.275 50 mica 0.267 60 Vermiculite 0.165 140 Calcium silicate 0.715 100

3-2 Characterization of pearlite

In order to use pearlite as a material for the hard core panel, the amount of the maximum amount of the inorganic binder per 10 g of pearlite was investigated, and the volume of the mortar mixed with the pearlite and the inorganic binder was examined. Specifically, the method of measuring the amount of binder absorption was based on the KS M ISO 787-5 standard, and the volume of the mortar was measured before drying the mixture of the pearlite and the binder. The results are shown in Table 6 below.

Additive name Binder absorption
(ml / 10g) Mortar volume
(ml) Pearlite A 36.0 66.7 Pearlite B 21.6 50.0 Pearlite C 18.0 48.0 Pearlite D 18.0 42.0

Referring to Table 5 and FIG. 2, pearlite containing silicon dioxide as a main component is a hollow structure having a balloon shape and has a low specific gravity. When the panel is manufactured, space is created inside the panel to lower the specific gravity of the panel And it becomes a main element constituting the panel at the same time.

In addition, as shown in Table 5 and FIG. 3, aluminum silicate (FIG. 3A) is a fine particle, which is injected when a hard core panel is manufactured, thereby enhancing the strength of the panel by filling the space between each component constituting the panel. The weight of the hard core panel is increased, which makes it difficult to mix a large amount of lightweight hard core panels.

In addition, in the case of mica (Fig. 3B) and calcium silicate (Fig. 3D) in which the particle shape is flake or needle-shaped, it acts as a bridge between the materials constituting the panel during hard core panel manufacture, However, since the aluminum silicate has a high specific gravity, it is difficult to mix a large amount of lightweight hard core panels.

In addition, in the case of vermiculite (FIG. 3c), the specific gravity of the vermiculite is low, and it has a characteristic of expanding in the hot molding process, thereby contributing greatly to controlling the specific gravity of the hard core panel.

Therefore, from the results of Example 3, pearlite or vermiculite plays a role of lowering the specific gravity of the panel in the production of the hard core panel, and becomes a main element constituting the panel, so that a lightweight hard core panel can be manufactured. It is considered that the strength of the hard core panel can be supplemented and strengthened by mixing with the mica or the silicate, rather than using alone.

In particular, pearlite is a lightweight filler with a low specific gravity which is a micro-hollow spherical micro-hollow sphere. It is processed by high-temperature foaming by a special heat treatment method after processing the igneous rock produced by volcanic eruption into fine particles, And has excellent fluidity when mixed with other materials, so that mixing of the materials is facilitated, and as shown in Table 6, the inorganic binders are absorbed and mixed very easily. In addition, since pearlite contains air inside the particles as an independent vaporizer, it has excellent thermal characteristics such as low specific gravity design, insulation, and prevention of condensation, and gives excellent thermal characteristics to the hard core panel manufactured using the pearlite .

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. It is.

Claims (7)

50 to 94 parts by weight of liquid silicate, 5 to 30 parts by weight of nano silica, 0.5 to 10 parts by weight of a Li-based additive and 0.5 to 10 parts by weight of a silane compound,
Wherein the liquid silicate has a composition of 76.0 to 80.0 wt% of Si, 19.6 to 23.0 wt% of Na, 0.15 to 0.35 wt% of K, 0.2 to 0.3 wt% of Al, and 0.05 to 0.15 wt% of Al, based on 100 wt% %, ≪ / RTI >
The Li-based additive is at least one selected from the group consisting of lithium carbonate, lithium hydroxide, lithium silicate and lithium sulfate,
Wherein the silane compound is at least one selected from the group consisting of tetraethoxysilane, methyltriethoxysilane, sodium methylsiliconate, methyltrimethoxysilane, potassium methylsiliconate, butyltrimethoxysilane and vinyltrimethoxysilane The inorganic binder composition for a ship interior hard core panel has water resistance, flexibility and light weight. delete delete delete The method according to claim 1,
Wherein the composition further comprises an inorganic additive or a curing agent. The inorganic binder composition for a ship interior hard core panel having water resistance, flexibility and light weight. 6. The method of claim 5,
Characterized in that the inorganic additive comprises an inorganic filler selected from pearlite or vermiculite and at least one strength enhancer selected from mica, aluminum silicate and calcium silicate. Inorganic binder composition for a panel.
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