KR20130066455A - High insulation flame-retardant expanded polystyrene bead manufacturing method - Google Patents
High insulation flame-retardant expanded polystyrene bead manufacturing method Download PDFInfo
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- KR20130066455A KR20130066455A KR1020110133279A KR20110133279A KR20130066455A KR 20130066455 A KR20130066455 A KR 20130066455A KR 1020110133279 A KR1020110133279 A KR 1020110133279A KR 20110133279 A KR20110133279 A KR 20110133279A KR 20130066455 A KR20130066455 A KR 20130066455A
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- flame retardant
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- flame
- polystyrene bead
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/16—Making expandable particles
- C08J9/18—Making expandable particles by impregnating polymer particles with the blowing agent
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
- C08J9/365—Coating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/016—Flame-proofing or flame-retarding additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0853—Vinylacetate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/06—Polystyrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
- C08J2325/04—Homopolymers or copolymers of styrene
- C08J2325/06—Polystyrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Description
The present invention relates to a process for producing flame-retardant expanded polystyrene (EPS, styrofoam, hereinafter referred to as "EPS") beads, and more particularly to metal hydrides such as aluminum hydroxide and expanded graphite. The present invention relates to a method for producing EPS beads by coating and adjusting a flame retardant composition having excellent emission smoke suppression properties and high thermal foam resin particles having very low thermal conductivity onto pre-foamed EPS beads.
In various industries such as buildings, various materials are used to promote external beauty and insulation, and currently, EPS boards are widely used. In addition, in recent years, the level of flame retardancy required to protect life and property from fire has become more stringent in all industries, and high flame retardancy is required. In particular, it has been pointed out that flame retardants containing bromine or chlorine are harmful to humans during combustion, and thus the need for flame retardants to reduce dioxins is further strengthened.
In addition, the molded EPS used for the insulation of the building at the construction site is widely used that processed in the form of a board. These EPSs have the advantages of low cost, good workability and excellent handling when insulated, but are very vulnerable to fire and have poor thermal insulation properties compared to extruded boards (extrusion polystyrene XPS).
As a conventional technique for solving the above problems, a technique of coating on EPS beads (particles) with a flame retardant composition containing expanded graphite having excellent flame retardant properties is disclosed in Korean Patent No. 10-0602205 (Invention: Containing expanded graphite Disclosed is a method for producing a nonflammable flame retardant polystyrene resin particle, hereinafter referred to as "Patent Document 1". The said patent document 1 improves the flame retardance of EPS beads by coating and crosslinking a mixture of expanded graphite, a thermosetting liquid phenol resin, and a curing catalyst to polystyrene foam particles.
However, Patent Document 1 was not environmentally friendly by using a phenol resin obtained by condensation of formaldehyde, a phenol and a carcinogen, to the human body. In addition, there was a problem that adversely affects the human body by emitting harmful gas when EPS is smoked.
Currently, temporary buildings with temporary constructions are using sandwich panels with thin iron plates on both sides of EPS.The foamed polystyrene panels used for sandwich panels are 20 ㅁ 5 ℃ by KS L 9016 or KS F 2777. Insulation materials of "I" grade with a thermal conductivity of 0.035 W / mk under test conditions, and generally have little flame retardancy.
Therefore, the existing sandwich panel not only has excellent thermal insulation efficiency, but also has a poor flame retardant efficiency, and when used as an exterior wall of a temporary building, there is a problem of causing heat loss of a building, and it is not excellent in flame retardancy, so it is not toxic gas in case of fire. The amount of occurrence is a situation that threatens human life.
Therefore, the present invention is coated with a pre-foamed high-insulation foamed polystyrene bead coated with a flame-retardant composition that can suppress the fumes suppression properties and harmful gases when smoked using a metal hydroxide or non-metal hydroxide and expanded graphite of aluminum hydroxide on the thermal insulation efficiency and flame retardancy It is to provide a method for producing this excellent EPS beads.
Another object of the present invention is to produce a flame retardant EPS beads by coating a flame retardant composition to impart flame retardancy to the EPS beads by coating a mixture of metal hydroxides and non-metal hydroxides and expanded graphite and oily vinyl acetate (Poly Vinyl Acetate) to the EPS beads In providing a method.
Another object of the present invention is to provide a flame retardant EPS bead coating and EPS bead manufacturing method that is easy to bond between the EPS beads when forming a board by coating the EPS beads.
The present invention for achieving the above object contains 20 to 40 parts by weight of aluminum hydroxide, 10 to 40 parts by weight of expanded graphite, 18 to 40 parts by weight of vinyl acetate resin, 5 to 10 parts by weight of a curing agent, 30 to 50 parts by weight of an organic solvent. Characterized in that the flame retardant composition characterized in that.
It is preferable that the said flame retardant composition further contains 20-30 weight part of calcium hydroxide as a flame retardant adjuvant.
Preferably, the flame retardant composition further contains 2-3 parts by weight of a release agent coated on the surface of the EPS beads so that the EPS molding can be easily separated from the mold during molding.
The expanded graphite has a density of 1 ~ 2.5g /, the particle size is 1 ~ 10 and the expansion rate is preferably used within 50 ~ 200 times, the expanded graphite layer acts as an insulating layer to prevent the movement of heat, non-halogen It is good to make the type of low smoke-friendly eco-friendly.
The particle size of the aluminum hydroxide and calcium hydroxide in the form of powder is preferably 1 to 10 to facilitate the coating on the high-insulation EPS beads.
The composition of the flame retardant composition may be prepared by sequentially or simultaneously adding and stirring the powder of aluminum hydroxide, expanded graphite, calcium hydroxide and liquid vinyl acetate resin, and a curing agent to a stirrer of a blender rotating at a speed of 50 to 150 rpm.
According to another aspect of the present invention, a method of manufacturing a flame retardant EPS bead is obtained by mixing the flame retardant composition and the high-insulation EPS resin particles pre-foamed 50 to 80 times with a pressure batch batch foamer in a weight ratio of 1: 1. It is characterized by coating the flame retardant on the surface of the EPS beads by stirring in a stirrer of 10 to 20 minutes at a rotational speed of 50 ~ 150rpm.
Flame retardant composition according to an embodiment of the present invention is expanded graphite graphite acts as an insulating layer to prevent the movement of heat and lose water when heated and changed to aluminum oxide using aluminum hydroxide, calcium hydroxide and water excellent in flame retardant properties By not using an organic solvent, it is possible to minimize the generation of harmful gases in a fire. It is environmentally friendly. In addition, the use of vinyl acetate resin has the advantage of easy coating on the surface of the EPS beads.
Hereinafter, preferred embodiments of the present invention will be described in more detail. It should be understood, however, that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth. It should be noted that the embodiments of the present invention described below are intended to sufficiently convey the spirit of the present invention to those skilled in the art.
[Production of Flame Retardant Composition]
The metal hydroxide used in the present invention uses aluminum hydroxide (AlOH 3 ) having low smoke properties by losing water when heated and being converted to aluminum oxide, and the nonmetallic hydroxide used as a flame retardant aid is calcium hydroxide (CaOH 2 ). Can be used. In addition, methanol is used as a solvent, and polyvinyl acetate is used as an adhesive to facilitate the coating on the surface of the EPS beads and to increase the bonding force between the high-insulation EPS beads when forming into a desired shape with the high-insulation EPS beads. use.
20 to 40 parts by weight of aluminum hydroxide powder, 10 to 40 parts by weight of expanded graphite powder, 18 to 40 parts by weight of liquid vinyl acetate resin, 5 to 10 parts by weight of liquid hardener, and 30 to 50 parts by weight of methanol were added to a blender equipped with a stirrer. Rotate the stirrer at 50-150 rpm and mix for 10-20 minutes.
At this time, the expanded graphite has a density of 1 ~ 2.5g /, the particle size is 1 ~ 10㎛ and the expansion rate is preferably used within 50 to 200 times. The expanded graphite acts as an insulating layer to hinder the movement of heat. The particle size of the aluminum hydroxide and calcium hydroxide in the form of powder is preferably 1 to 10 to facilitate the coating on the EPS beads.
The metal hydroxide, aluminum hydroxide, expanded graphite, and vinyl acetate resin are well dissolved in methanol, which is an organic solvent, and when sufficiently stirred with a stirrer of the blender, a liquid flame retardant composition is completed.
In addition, 20 to 30 parts by weight of calcium hydroxide powder may be added and stirred as a flame retardant aid within the stirring time to increase the flame retardant efficiency. The calcium hydroxide exhibits a strong basicity of about pH 12.5, and can be increased in flame retardant efficiency by decomposition into calcium oxide and water (H 2 O) at high temperatures. At this time, the particle size of the aluminum hydroxide powder, expanded graphite powder and calcium hydroxide powder is preferably used in the range of 1 to 10.
In addition, the coating of the surface of the high-insulation EPS beads within the stirring time, and then added to the mold to add and add 2 to 3 parts by weight of a release agent so that the high-insulation EPS molding formed from the mold can be separated well when molding into a desired shape. The flame retardant composition can be completed.
The flame retardant composition formed by the above process has a low flame retardant property by using aluminum hydroxide, expanded graphite, calcium hydroxide having good flame retardancy.
In the embodiment of the present invention, an example in which calcium hydroxide is used as a flame retardant aid has been described, but a susocompound 2H 2 BO 3 may be used, and may be omitted if necessary.
[Coating of Flame Retardant Composition on Surface of EPS Bead]
Flame-retardant EPS beads production is a high-insulation EPS beads obtained by pre-expanding 50 to 80 times the flame retardant composition and the high-insulation EPS resin particles (Neopor beads of BASF, Germany) in a pressure batch batch foamer with a weight ratio of 1: 1 Into the stirrer of the blender to agitate 10 to 20 minutes at a rotational speed of 50 ~ 150rpm to coat the flame retardant on the surface of the EPS beads.
At this time, in order to uniformly coat the flame retardant on the surface of the high-insulation EPS beads, it may be considered to increase the rotational speed of the stirrer of the blender at a speed of 200 ~ 300rpm. As the rotation speed of the stirrer is increased, the flame retardant is more homogeneously coated on the surface of the high-insulation EPS beads.
The high-insulation EPS beads made by coating the flame retardant composition, including expanded graphite, aluminum hydroxide, calcium hydroxide, vinyl acetate resin, and the like, as described above, are formed by a known EPS panel manufacturing method. In this case, by using ethanol having a relatively high volatility in the solvent of the flame retardant composition, there is an advantage that the drying time can be shortened by molding the high insulation flame retardant EPS beads.
The high-insulation EPS beads made by the above process is uniformly and hardly coated with a flame retardant coating, and when the panel formed is burned, a fireproof layer is formed from the surface layer coated on the high-insulation EPS beads by the porous difference (Char: carbide core). Formed to provide incombustibility. In addition, the calcium hydroxide applied in the embodiment of the present invention is decomposed into calcium oxide (calcium oxide) and water (H 2 O) at a high temperature during heating to suppress combustion, so that even when the molded body is subjected to the front surface of the flame, Due to the formation and action of calcium hydroxide, it is extinguished immediately and suppresses further shape collapse by heat.
After the flame retardant composition was coated on the surface of the high-insulation EPS beads by the above-described process to form a molded article of the panel shape, the thermal conductivity was measured at 20 ㅁ 5 ℃ test conditions by KS L 9016 or KS F 2777 0.032W / mk The flame retardancy test was conducted according to the flame retardant performance standard of building interior finishing materials (Notice of Ministry of Construction and Transportation, 2006-476, KS F ISO 5660-1). The suitability was judged by the formation of the fire prevention layer by car. That is, the total heat dissipation heat amount is 8MJ / ㎥ or less, and the time (seconds) when the emission rate exceeds 200Kw / ㎥ is 0 seconds, which meets the criteria of 10 seconds or more. There was no. The mean behavior stop time, which is a gas hazard test item, was 13 minutes or more, which was in compliance with the regulations of 9 minutes or more.
[Manufacture of Sandwich Panel]
When the high-insulation EPS panel having high insulation and flame retardancy and a tin plate material or an aluminum plate material having a thickness of 0.2 to 0.5 mm are introduced into the sandwich panel manufacturing apparatus by the above-described process, both sides of the high insulation EPS panel The above tin plate or aluminum plate is attached by a bond to produce a sandwich panel having a lightweight, high insulation and excellent flame retardant properties.
In case of manufacturing sandwich panel using high insulation EPS panel having high insulation flame retardancy, high insulation EPS attached inside the metal plate, such as tin plate or aluminum plate, which has excellent thermal conductivity, is rapidly cooled by external temperature. The thermal conductivity of the panel is very low, so it is easy to block the outside temperature.
In addition, even if the external metal plate of the sandwich panel is subjected to a high temperature flame for about 10 seconds, the flame retardant composition is coated on the surface of the high-insulation EPS beads constituting the high-insulation EPS panel, which is a core material of the sandwich panel, so that it is well maintained even at a relatively high temperature. It was excellent in flame retardancy by enduring.
The flame retardant composition according to the embodiment of the present invention as described above is expanded between aluminum hydroxide having excellent flame retardancy and expanded graphite forming a porous fireproof layer upon expansion, calcium hydroxide which decomposes into water and calcium oxide when heated and inhibits smoke, EPS beads The composition is composed of vinyl acetate resin and methanol, which promote the formation of bonds and mixed compositions, and thus suppresses smoke during fire and suppresses generation of combustion gas during smoke, thereby suppressing generation of harmful gases.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110133279A KR20130066455A (en) | 2011-12-12 | 2011-12-12 | High insulation flame-retardant expanded polystyrene bead manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110133279A KR20130066455A (en) | 2011-12-12 | 2011-12-12 | High insulation flame-retardant expanded polystyrene bead manufacturing method |
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| Publication Number | Publication Date |
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| KR20130066455A true KR20130066455A (en) | 2013-06-20 |
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| KR1020110133279A KR20130066455A (en) | 2011-12-12 | 2011-12-12 | High insulation flame-retardant expanded polystyrene bead manufacturing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015122697A1 (en) * | 2014-02-12 | 2015-08-20 | 한국건설기술연구원 | Flame-retardant foam insulator and method for manufacturing same |
| WO2019221392A1 (en) * | 2018-05-15 | 2019-11-21 | 에스케이테크윈 주식회사 | Quasi-nonflammable bead composition for preparing quasi-nonflammable expanded polystyrene and preparation method thereof |
-
2011
- 2011-12-12 KR KR1020110133279A patent/KR20130066455A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015122697A1 (en) * | 2014-02-12 | 2015-08-20 | 한국건설기술연구원 | Flame-retardant foam insulator and method for manufacturing same |
| WO2019221392A1 (en) * | 2018-05-15 | 2019-11-21 | 에스케이테크윈 주식회사 | Quasi-nonflammable bead composition for preparing quasi-nonflammable expanded polystyrene and preparation method thereof |
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