KR101147319B1 - Inorganic hybrid composition for blocking and absorbing sound - Google Patents

Abstract

PURPOSE: An inorganic fused material composition for sound-proofing and sound absorbing are provided to improve soundproof, sound absorption, and insulation effects by including vermiculite, pearlite, and nano silicate. CONSTITUTION: An inorganic fused material composition for sound-proofing and sound absorbing comprises 40-45 parts by weight of vermiculite, 1-1.5 parts by weight of foaming agent, 40-45 parts by weight of pearlite, 4-5 parts by weight of titanic acid potassium whisker, 1-2 parts by weight of calcium oxide, and 15-20 parts by weight of nano silicate. The inorganic fused material composition for sound additionally includes 5-10 parts by weight of mica, 10-15 parts by weight of diatomaceous earth, and 10-20 parts by weight of volcanic stone. The nano silicate is a mixture of sodium silicate and potassium silicate in weight ratio of 2:1.

Description

Inorganic-based fusion composite composition for sound insulation and sound absorption {INORGANIC HYBRID COMPOSITION FOR BLOCKING AND ABSORBING SOUND}

The present invention relates to a soundproofing and sound-absorbing composition using an inorganic fusion composite material. More specifically, the present invention relates to sound insulation and sound absorption compositions containing vermiculite, pearlite and nano silicates. Soundproofing and sound-absorbing compositions of the present invention can cushion and absorb the vibration and noise generated in the walls, floors and buildings of the building itself.

In modern society, due to the development of scientific civilization, automobile noises and various kinds of noises are generated, and protective equipments for sound insulation and sound absorption are installed.In buildings, many problems are raised due to floor noise, and furthermore, environmental pollution syndrome Symptoms are also occurring. As such, the noise in the life not only causes a lot of mental damage, but also the soundproof walls and the like around urban roads or highways are hurting the beauty.

As a sound insulation material for blocking such noise, the Korean Patent Application No. 10-2010-0040480 "Thermosetting resin soundproof wall", Korean Patent No. 10-0039660 "Interlayer Soundproofing Material", Korean Patent No. 060628 "Finishing material for interlayer noise prevention" , Korean Patent No. 083117, Floor Impact Sound Absorption Sound Insulation Material, Korean Patent No. 0609838, Sound Insulation Material Using Polymer Resin, Korean Patent No. 10-0761332, Sound Insulation Material for Shock Absorption, Korean Patent No. 084158, and Patent No. 0097220 "Interlayer sound insulation using polyurethane foam", Korean Patent No. 10-1026698 "Open Soundproof Wall Structure", Korean Patent No. 10-0886467 "Soundproof Ventilation Panel", Korean Patent No. 10-0622022 "Roof Soundproof Wall Structure", etc. Various building materials for sound insulation and sound insulation are disclosed. However, these existing building materials for sound insulation and sound insulation often use chemicals that emit toxic gases and environmental hormones, which are harmful substances, to improve durability and work convenience. Is being caused.

Therefore, in order to reduce such noise, the government sets various regulations and introduces promotion measures such as eco-friendly product certification, and actively supports and encourages the production of products that can realize sound insulation and sound insulation as materials beneficial to the human body and the environment. Doing.

In addition, due to the recent increase in national interest in well-being, the market scale for the development of energy-saving eco-friendly soundproofing and sound absorbing materials is expanding.

Furthermore, as consensus on energy savings is spread due to high oil prices, interest in energy-efficient soundproofing and sound absorbers is increasing. Currently, Korea's overseas dependence on energy is about 97%, and the building sector accounts for about 24% of Korea's total energy consumption. Therefore, it is very important to use eco-friendly energy-saving materials as sound insulation and sound absorbers between walls. Can be.

It is an object of the present invention to provide an environment-friendly and energy-saving soundproofing and sound-absorbing composition in which no harmful substances such as environmental hormones are released.

In order to achieve the above object, in one embodiment, the present invention is 40-45 parts by weight of vermiculite, 40-45 parts by weight of pearlite, 1-1.5 parts by weight of blowing agent, 4-5 parts by weight of potassium titanate whisker, 1-2 parts by weight of calcium oxide An inorganic sound-absorbing and sound-absorbing composition containing 15-20 parts by weight and 15-20 parts by weight of nanosilicate as a main raw material is provided.

In another embodiment, the composition of the present invention further comprises 5-10 parts by weight of mica stone, 10-15 parts by weight of diatomaceous earth and 10-20 parts by weight of ash.

In the present invention, the nano silicate acts as a binder and is preferably a mixture of 2: 1 by weight ratio of sodium silicate and potassium silicate.

In the present invention, the mica stone is preferably white mica.

In the present invention, the particle size of vermiculite and pearlite is preferably 150-170 mesh.

In the present invention, the particle size of mica and diatomaceous earth is preferably 300-350 mesh.

In the present invention, the soundproofing and sound absorbing composition can be compressed and cured at a temperature of 210-220 ° C.

In the present invention, the soundproofing and sound absorbing composition can be formed into a wall finish through a compression and curing process.

In the present invention, the wall finish formed through the compression and curing process may be a board or a panel.

When the wall of the building is finished using the soundproofing and sound absorbing composition according to the present invention, or when the wall finishing material formed from the soundproofing and sound absorbing composition according to the present invention is applied to the wall of the building, high sound insulation and sound absorption performance, as well as thermal insulation Even effects can be obtained. In addition, the sound-absorbing and sound-absorbing composition according to the present invention does not use harmful organic chemicals, there is no fear that harmful substances or environmental hormones, etc. are not released, it does not threaten human health and is environmentally friendly.

1 shows the surface structure of nano silicates.
2 is a SEM photograph of potassium titanate whiskers.

Inorganic-based convergence soundproofing and sound-absorbing compositions according to the present invention, after the addition of vermiculite (unprocessed stone), pearlite (navy blue) to the liquid nano silicate binder as a main component of the sound-absorbing and sound-absorbing agent and mixing, selectively impregnating functional additives Is done by. Further functional additives added are potassium titanate whiskers, calcium oxide and blowing agents. The composition may further comprise a dolomite, diatomaceous earth and volcanic ash. The composition thus formed was found to be a material that exhibits sound insulation as well as exothermic properties.

Based on the characteristics of the fusion of mica-based white mica, diatomaceous earth, vermiculite and pearlite, which are the main components of sound insulation, among the compositions composed of dark ore materials, these functional materials are used as sound insulation and sound absorption materials. Among the methods, the most effective and inexpensive method is to manufacture and apply in the form of wall or interlayer soundproofing and sound-absorbing plate to the existing organic soundproofing material in the development of light-weight soundproofing material having heat- and flame-retardant performance as well as environmentally friendly aspects of these functional materials. It is expected to have a useful effect as a replaceable new building interior material.

In particular, in developing an eco-friendly soundproofing fusion composition, consideration should be given that it does not contain environmental hormone-inducing substances, as well as various asbestos and heavy metals. In addition, it should have a performance suitable for noise vibration regulation in research and evaluation of general merchandise and physical properties such as workability as a composition and coating film tests such as high temperature plastic strength, accelerated weather resistance test, adhesion test, and the like within acceptable values.

In the present invention, in the development of the inorganic-based sound-absorbing and sound-absorbing composition, satisfies the physical property test, transmission loss sound absorption rate, sound absorption reliability, etc., as a material capable of achieving a composition with excellent sound absorption compared to the existing general soundproofing material as follows Raw materials were selected.

Main raw materials)

1) Vermiculite = 40-45 parts by weight, pulverized into 100-150 mesh

2) Perlite = 40-45 parts by weight, granulated to 100-150 mesh

3) 15-20 parts by weight of nano silicide, binder

4) 4-5 parts by weight of potassium titanate whisker, asbestos needle structure, strength enhancement

5) 1-2 parts by weight of calcium oxide, heating material

6) 1-1.5 parts by weight of blowing agent, foaming of the composition

additive)

1) Mica stone (Mica) = 5-10 parts by weight, granulated to 300-350 mesh

2) Diatomaceous earth = 10-15 parts by weight, granulated to 300-350 mesh

3) volcanic ash = 10-20 parts by weight 150 mesh

Nano Silicate  materials Mineral  Eco-friendly sound insulation and insulation using fusion material Wall finishing material

The soundproofing / insulating wall finishes used in Korea in the past are generally inexpensive and generally use organic materials such as styrofoam and urethane foam (65-70% of the domestic market size) with good handling and workability. However, organic sound insulation and insulation wall finishes generate a large amount of carbon dioxide in the production (foaming) process, and because of their high flammability, there is a safety problem such as high flame propagation speed in case of fire and toxic gas is released. We expect gradual increase in regulations and decrease in demand.

In addition, carbon monoxide, chlorine gas, and hydrogen cyanide, which are generated during the combustion of organic sound-insulating and insulating wall finishes, are harmful to the human body. It implies

In addition, the glass satisfies the non-combustible performance even in sound absorbing and insulating materials due to the social environment where the fire resistance of buildings is strongly required due to various fire accidents. The use of inorganic sound absorbing and insulating materials such as cotton and mineral wool is increasing rapidly.

In order to put the inorganic sound absorbing and insulating material into practical use, it is necessary to improve the thermal conductivity, specific gravity, etc., which act as their disadvantages, and to improve the performance of fire and human harmfulness, sound absorbing and insulating properties.

The present invention has been made in view of the problems of the prior art as described above, and has developed an inorganic-based fusion-soundproof and sound-absorbing composition that is harmless to the human body, has flame retardancy and exothermic properties, and also has excellent sound absorption performance.

Inorganic-based fusion sound insulation and sound-absorbing material based on the nano silicate of the present invention is non-combustible, there are many advantages such as can be applied in various fields.

In the process of developing inorganic-based fused sound insulation and sound absorbing materials based on the nanosilicate of the present invention, there is a need to improve sound absorption and insulation, reduction in specific gravity, and workability. In the present invention, by fusion compounding nano silicate and vermiculite, pearlite, mica and diatomaceous earth, it was possible to develop an excellent inorganic fused sound insulation and sound absorbing material having light weight, fire resistance, heat insulation and sound absorption.

Of conventional sound absorption and insulation Organic  Of raw material and the present invention Mineral  Comparison of raw materials Kinds importance
[gr / cm ² ] Thermal conductivity
[kcal / (mhrc)] Hygroscopic Flame resistant Hazard
(Combustion) Polyurethane 0.016-0.030 0.020-0.021 Minor Combustion CO gas generation polystyrene 0.013-0.032 0.029-0.032 4% (Vol.) Combustion CO gas generation Cellulose 0.035-0.048 0.025-0.038 4% (Vol.) Combustion CO gas generation Mineral wool 0.024-0.040 0.033-0.038 4% (Vol.) Non-combustion - Pearlite 0.030-0.640 0.060-0.120 Minor Non-combustion - Vermiculite 0.030-0.100 0.070-0.120 Minor Non-combustion -

Composition of Inorganic Soundproofing and Sound Absorption Compositions According to One Embodiment of the Invention Ingredient Name Component ratio (wt%) Remarks Nano silicate 15 Sodium silicate
Potassium silicate Pearlite 40 Expanded pearlite Vermiculite 40 Effervescent vermiculite Potassium Titanate Whiskers 4 Couch structure for asbestos replacement,
Strength enhancement Calcium oxide One Fever material

Nano Silicate

Nanosilicate is preferably an inorganic binder made by synthesizing sodium silicate (Na ₂ O? NSiO ₂ ? XH ₂ O) and potassium silicate (K ₂ O? NSiO ₂ ? XH ₂ O) in a weight ratio of 2: 1. Nano silicates optimize initial adhesion, water resistance and curing temperature. The amount of nano silicates in the composition of the present invention is 15-20 parts by weight. If the amount is less than 15 parts by weight, the desired effect is not obtained, and if it exceeds 20 parts by weight, the increase in the amount of nano silicate is not effective as there is no increase in performance.

Sodium Silicate Physical Properties pH importance Na2O SiO2 Mole ratio Viscosity
(cps, 20 ℃) 12-13 1.690 17.5 37 2.18 12

Properties of Potassium Silicate pH importance Na2O SiO2 Mole ratio Viscosity
(cps, 20 ℃) 11-12 1.273 10.3 22.2 3.38 10

Pearlite

Pearlite (pearlite) is used as a white porous body foamed by heating at a high temperature of 600 ~ 800 ℃. The porosity present in pearlite provides the composition with light weight, sound absorption and thermal insulation. Moreover, since a pearlite inorganic material has fire resistance, it can be used as a sound absorption and insulation material. Pearlite in the present invention has sound absorption and heat insulation. The amount of pearlite in the composition of the present invention is 40-45 parts by weight. If the amount is less than 40 parts by weight, the desired sound absorption and heat insulation effect is not obtained. If the amount is more than 45 parts by weight, there is no increase in performance as the amount of pearlite is not effective.

Properties of Perlite pH Density (g / cm2) Thermal Conductivity (Kcal / mh ℃) Fire resistance temperature (℃) 7 0.1-0.25 0.04-0.06 1,150

Vermiculite

Vermiculite (Vermiculite) is a chemical component _{(MgFe, A) 13 (Al} , Si) 4 O 10 (OH) silicate hydroxide ore with a _2? Al? Mg? 4H ₂ O as iron. When the vermiculite is heated to about 1000 ℃, the interlayer water is dehydrated, and at this time, the pressure generated from the crystal water causes peeling and expansion in the bottom direction. Widely used as industrial material. The amount of vermiculite in the composition of the present invention is 40-45 parts by weight. If the amount is less than 40 parts by weight, the desired sound absorption and thermal insulation effect is not obtained, and if it exceeds 45 parts by weight, the amount of vermiculite is not increased as the amount of performance is not effective.

Potassium titanate Whiskers

Potassium titanate whiskers refer to potassium hexatitanate whiskers (called K ₂ Ti ₆ O ₁₃ whiskers, abbreviated as PTW). Were the United States DuPont developed by the K ₂ Ti ₆ O ₁₃ whiskers, due to the excellent heat resistance and mechanical performance was used as insulation / heat-resistant material for the new, K ₂ Ti ₆ O ₁₃ whiskers particles are ideal for asbestos products and affordable prices It is recognized as a substitute.

Potassium hexatitanate is a crystal having a tunnel structure in which TiO ₆ octahedron is formed by edge and vertex connection. K + ions are fixed in an octahedral tunnel, isolated from the outside, and do not elute out of the tunnel even if they are in solution, and the tunnel is parallel to the whisker axis. Thus, potassium hexatitanate whiskers exhibit very high chemical stability. Molecular weight is 573.48, white / pale yellow acicular single crystal, 0.1 ~ 1.5μm in diameter, 10 ~ 100μm in length, relative density 3.3, Mohs hardness 4, melting point 1370 ℃, heat resistance 1200 ℃, tensile strength 6860Mpa, modulus of elasticity 27440MPa, resistance It exhibits excellent physical properties of 3.3 × 10 15 Ω · cm, specific heat 0.22kJ / kg · K, coefficient of thermal expansion 6.8 × 10 ⁻⁶ , and dielectric loss tangent of 0.06 to 0.09.

Potassium titanate whiskers in the compositions of the present invention are used as strength enhancers, and the amount of potassium titanate whiskers in the composition is 4-5 parts by weight. If the amount of potassium titanate whisker is less than 4 parts by weight, the desired effect is not obtained, and if it exceeds 5 parts by weight, the amount of potassium titanate whisker is not increased as the amount of performance is not effective.

Calcium oxide

When water is added, it is used as a heat source in the compression molding process by using a heat generating property, and also accelerates the curing rate of the nano silicates. Also called calcium hydroxide lime or quicklime. The chemical formula is CaO, and pure calcium oxide is equiaxed white crystals with a melting point of 2,570 ° C. When left in the air, it absorbs moisture and carbon dioxide and breaks it down into calcium hydroxide (calcite) and calcium carbonate. In addition, the addition of water generates heat to form calcium hydroxide.

In the composition of the present invention calcium oxide exothermic, the amount of calcium oxide in the composition is 1-2 parts by weight. If the amount of calcium oxide is less than 1 part by weight, the desired effect may not be obtained. If the amount of calcium oxide is more than 2 parts by weight, there is no increase in performance as the amount of calcium oxide increases, which is not effective.

Example

40 parts by weight of vermiculite and 40 parts by weight of pearlite are respectively pulverized into particles of 150 mesh. The prepared vermiculite and pearlite particles are added to 15 parts by weight of a binder composed of a 2: 1 mixture in a weight ratio of sodium silicate and potassium silicate.

Next, 4 parts by weight of potassium titanate whisker is added and mixed well, then 1 part by weight of calcium oxide and 1 part by weight of blowing agent are added and mixed well.

Next, 5 parts by weight of white mica and 10 parts by weight of diatomaceous earth and 10 parts by weight of volcanic ash are added to the homogeneously mixed mixture as particles pulverized into 300 mesh to homogeneously mix to obtain an inorganic fusion soundproofing and sound absorption composition.

The obtained composition was compression set at 210 ° C. to obtain a panel-shaped wall finish, and then tested for transmission loss and sound absorption. The results are shown in Table 6.

Test Items Achievement Transmission Loss (KS F 2808) 500Hz 25dB or more
1000Hz 30dB or more 500 Hz 25 dB
1000 Hz 30 dB Sound Absorption Rate (KS F 2805) More than 85% 85% Test request agency: Korea Institute of Construction and Environmental Testing (2011/09/20)

As shown in Table 6 above, the wall finishes prepared using the compositions of the present invention exhibited satisfactory sound absorption properties.

Claims (10)

Inorganic melt comprising 40-45 parts by weight of vermiculite, 40-45 parts by weight of pearlite, 1-1.5 parts by weight of blowing agent, 4-5 parts by weight of potassium titanate whisker, 1-2 parts by weight of calcium oxide and 15-20 parts by weight of nano silicate Composite soundproofing and sound absorption composition. [Claim 2] The composition for inorganic fusion sound insulation and sound absorption according to claim 1, further comprising 5-10 parts by weight of mica, 10-15 parts by weight of diatomaceous earth, and 10-20 parts by weight of volcanic stone. The composition for inorganic fusion sound insulation and sound absorption according to claim 1, wherein the nano silicate is a mixture of 2: 1 in a weight ratio of sodium silicate and potassium silicate, and acts as a binder. The composition for inorganic fusion sound insulation and sound absorption according to claim 1, wherein the mica is white mica. The composition for inorganic fusion sound insulation and sound absorption according to claim 1, wherein the vermiculite and pearlite have a particle size of 150-170 mesh. The composition of claim 1, wherein the particle size of the mica and diatomaceous earth is 300-350 mesh. The composition for inorganic fusion sound insulation and sound absorption according to claim 1, wherein the composition for sound insulation and sound absorption is compressed and cured at a temperature of 210 to 220 ° C. The composition for inorganic fusion sound insulation and sound absorption according to claim 1, which is formed as a wall finishing material by a compression and curing process. Wall finish formed by the soundproofing and sound-absorbing composition according to any one of claims 1 to 8. 10. The wall finish of claim 9, wherein the wall finish is in the form of a board or panel.

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