KR101093995B1 - Flame-retardant expanded polystyrene bead manufacturing method - Google Patents
Flame-retardant expanded polystyrene bead manufacturing method Download PDFInfo
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- KR101093995B1 KR101093995B1 KR1020090075448A KR20090075448A KR101093995B1 KR 101093995 B1 KR101093995 B1 KR 101093995B1 KR 1020090075448 A KR1020090075448 A KR 1020090075448A KR 20090075448 A KR20090075448 A KR 20090075448A KR 101093995 B1 KR101093995 B1 KR 101093995B1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/3492—Expanding without a foaming 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
- C08J9/22—After-treatment of expandable particles; Forming foamed products
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K21/00—Fireproofing materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
- B29K2025/04—Polymers of styrene
- B29K2025/06—PS, i.e. polystyrene
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Abstract
수산화알루미늄과 같은 금속 수화산물과 비금속 수산화물 및 팽창흑연을 이용하여 발연억제특성이 우수한 난연제 조성물을 코팅하는 난연 EPS 비드 제조 방법이 제공된다. 상기 난연 EPS 비드 제조방법은, 수산화알루미늄 20~40중량부, 팽창흑연 10~40중량부, 초산비닐수지 15~40중량부, 경화제 5~10중량부, 물 30~50중량부를 함유는 혼합물과 EPS 수지입자를 예비 발포하여 얻은 EPS 비드를 1:1의 중량비로 배합기의 교반기에 투입 교반하여 상기 EPS 비드의 표면에 상기 난연제를 코팅하는 단계로 이루어져 있다. Provided is a method for producing a flame retardant EPS bead which coats a flame retardant composition having excellent smoke suppression properties using a metal hydration product such as aluminum hydroxide, a non-metal hydroxide and expanded graphite. The flame-retardant EPS bead production method is a mixture containing 20 to 40 parts by weight of aluminum hydroxide, 10 to 40 parts by weight of expanded graphite, 15 to 40 parts by weight of vinyl acetate resin, 5 to 10 parts by weight of a curing agent, and 30 to 50 parts by weight of water. The EPS beads obtained by pre-expanding the EPS resin particles are added to the stirrer of the blender in a weight ratio of 1: 1 and stirred to coat the flame retardant on the surface of the EPS beads.
EPS 비드, 난연제, 발포 폴리스티렌, 난연 코팅, 수산화알루미늄, 수산화칼슘 EPS beads, flame retardant, expanded polystyrene, flame retardant coating, aluminum hydroxide, calcium hydroxide
Description
본 발명은 난연 발포성 폴리스티렌(expanded polystyrene : EPS, 스티로폼, 이하 "EPS"라 칭함) 비드(bead) 제조방법에 관한 것으로, 보다 상세하게는 수산화알루미늄과 같은 금속 수화산물과 수산화칼슘(소석회)과 같은 비금속 수산화물 및 팽창흑연을 이용하여 발연(emitting smoke) 억제특성이 우수한 난연제 조성물을 코팅한 EPS 비드 제조 방법에 관한 것이다. BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a process for preparing flame-retardant expanded polystyrene (EPS), styrene foam (hereinafter referred to as "EPS") beads, and more particularly to metal hydrides such as aluminum hydroxide and nonmetals such as calcium hydroxide (calcite). The present invention relates to a method for preparing EPS beads coated with a flame retardant composition having excellent emission suppression properties using hydroxides and expanded graphite.
건축물 등 다양한 산업에서는 다양한 재료들을 사용하여 외적 미려함, 단열 등을 도모하고 있고, 현재는 EPS 보드가 광범위하게 사용되고 있는 실정이다. 또한 화재로부터 생명과 재산을 보호하기 위하여 최근에 요구되는 난연성의 수준이 모든 산업분야서 더욱 엄격해졌고, 고난연성이 요구되고 있다. 특히 브룸 또는 염소를 함유하는 난연제는 연소 시 사람에게 유해한 다이옥신이 발생한다는 가능성이 지적되고 있어 다이옥신을 저감하는 난연제의 필요성이 한층 강화되고 있다. 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.
또한 건축현장에서 건축물의 단열을 위해 사용되는 성형된 EPS은 보드형태로 가공된 것을 널리 사용되고 있다. 이러한 EPS는 가격이 저렴하고 가공성과 단열 시공 시 취급이 우수하다는 장점이 있지만 불에 매우 취약하며, 압출보드(압출법 폴리스티렌 XPS)에 비하여 단열성이 떨어진다는 문제점을 가지고 있다. 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).
위와 같은 문제점을 해결하고자 한 종래의 기술로서는 난연 특성이 우수한 팽창흑연를 포함하는 난연 조성물로 EPS비드(입자)에 코팅하는 기술이 한국등록특허 제10-0602205호(발명의 명칭 : 팽창흑연을 함유한 불연성 난연 폴리스티렌 수지입자의 제조방법, 이하 "특허문헌 1"이라 칭함)에 개시되어 있다. 상기 특허문헌 1은 폴리스티렌 발포입자에 팽창흑연, 열경화성 액상 페놀 수지 및 경화 촉매의 혼합물을 코팅 가교하여 EPS 비드의 난연성을 향상시키는 것이다. 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.
그러나 위 특허문헌 1은 인체에 페놀과 발암물질인 포름알데히드의 축합에 의해 얻어지는 페놀수지를 이용함으로써 친환경적이지 못하였다. 또한 EPS가 발연 시 유해가스가 방출됨으로써 인체에 악영향을 주게되는 문제가 있었다. 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 adverse effects on the human body by the emission of harmful gases when EPS is smoked.
따라서 본 발명은 수산화알루미늄의 금속 수산화물과 비금속 수산화물 및 팽창 흑연을 이용하여 발연억제특성과 발연 시 유해가스를 억제할 수 있는 난연제 조성물을 코팅하여 난연성이 우수한 EPS 비드를 제조하는 방법을 제공함에 있다. Accordingly, the present invention provides a method for preparing EPS beads having excellent flame retardancy by coating a flame retardant composition capable of suppressing fumes suppression properties and harmful gases during smoke by using metal hydroxides, nonmetal hydroxides, and expanded graphite of aluminum hydroxide.
본 발명의 다른 목적은 금속 수산화물과 비금속 수산화물 및 팽창흑연과 초산비닐수지의 혼합물을 EPS 비드에 코팅하여 EPS 비드에 난연성을 부여하는 난연제 조성물을 코팅하여 난연성이 우수한 EPS 비드 제조 방법을 제공함에 있다. Another object of the present invention is to provide a method for producing EPS beads having excellent flame retardancy by coating a flame retardant composition to impart flame retardancy to the EPS beads by coating a mixture of metal hydroxide, non-metal hydroxide and expanded graphite and vinyl acetate resin on the EPS beads.
본 발명의 다른 목적은 난연성이 우수하며 EPS비드에 코팅하여 보드로 성형 시 EPS비드간의 결합을 용이하게 한 난연 EPS 비드 코팅제 및 EPS 비드 제조방법을 제공함에 있다. Another object of the present invention is to provide a flame retardant EPS bead coating and EPS bead manufacturing method which is excellent in flame retardancy and coated on EPS beads to facilitate the bonding between the EPS beads when forming a board.
상기한 목적을 달성하기 위한 본 발명은 수산화알루미늄 20~40중량부, 팽창흑연 10~40중량부, 초산비닐수지 18~40중량부, 경화제 5~10중량부, 물 30~50중량부를 함유하는 것을 특징으로 하는 난연제 조성물임을 특징으로 한다. 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 water Characterized in that it is a flame retardant composition.
상기 난연제 조성물은 난연 보조제로서 수산화칼슘 20~30중량부를 추가로 함유하는 것이 바람직하다. It is preferable that the said flame retardant composition further contains 20-30 weight part of calcium hydroxide as a flame retardant adjuvant.
상기 난연제 조성물은 EPS비드의 표면에 코팅되어 성형 시 금형틀에서 EPS 성형물이 용이하게 분리될 수 있도록 하는 이형제 2~3중량부를 추가로 함유하는 것이 바람직하다. 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.
상기 팽창흑연은 밀도가 1~2.5g/㎤이며, 입도는 1~10㎛이며 팽창율은 50~200배내의 것을 사용하는 것이 바람직하며, 팽창된 흑연층이 절연층으로 작용하여 열 의 이동을 방해, 비할로겐 타입의 저발연성 친환경으로 되도록 하는 것이 좋다. The expanded graphite has a density of 1 to 2.5 g / cm 3, a particle size of 1 to 10 μm, and an expansion ratio of 50 to 200 times, preferably, an expanded graphite layer acts as an insulating layer to hinder heat transfer. In addition, it is good to be non-halogen type, low smoke and environmentally friendly.
상기 분말형태의 수산화알루미늄과 수산화칼슘의 입도는 1~10㎛의 것을 사용하여 EPS 비드에 코팅이 용이하게 하는 것이 좋다. 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.
상기 난연제 조성물의 조성은 50~150rpm의 속도로 회전하는 배합기의 교반기에 상기 수산화알루미늄, 팽창흑연, 수산화칼슘의 분말과 액상의 초산비닐수지, 경화제을 순차적으로 또는 동시에 투입 교반하여 조성할 수 있다. The composition of the flame retardant composition may be formed by sequentially or simultaneously adding and stirring the powder of aluminum hydroxide, expanded graphite, calcium hydroxide, liquid vinyl acetate resin, and a curing agent to a stirrer of a blender rotating at a speed of 50 to 150 rpm.
본 발명의 다른 견지(Aspect)에 따른 난연 EPS 비드 제조 방법은 상기 조성된 난연제 조성물과 EPS 수지입자를 가압식 배치 발포기로 50~80배로 예비 발포하여 얻은 EPS 비드를 1:1의 중량비로 배합기의 교반기에 투입하여 50~150rpm의 회전속도로 10~20분 교반하여 상기 EPS 비드의 표면에 상기 난연제를 코팅함을 특징으로 한다.Flame retardant EPS beads manufacturing method according to another aspect of the present invention is a stirrer of the blender in a weight ratio of 1: 1 by weight of the EPS beads obtained by pre-foaming the composition of the flame retardant composition and the EPS resin particles in a pressure batch batch foamer 50-80 times It is characterized in that the flame retardant is coated on the surface of the EPS beads by stirring in 10 to 20 minutes at a rotation speed of 50 ~ 150rpm.
본 발명의 실시 예에 의한 난연제 조성물은 팽창된 흑연이 절연층으로 작용하여 열의 이동을 방해하는 팽창흑연과 가열 시 물을 잃고 산화알루미늄으로 변화되어 난연 특성이 우수한 수산화알루미늄, 수산화칼슘 및 물을 이용하여 유기용매를 사용하지 않음으로써 화재 시 유해가스의 발생을 최소화할 수 있다. 친환경적이다. 또한 초산비닐수지를 사용함으로써 EPS 비드의 표면에 코팅이 용이한 이점이 있다. 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.
이하 본 발명의 바람직한 실시 예들을 보다 상세하게 설명한다. 그러나 본 발명은 다수의 상이한 형태로 구현될 수 있고, 기술된 실시 예에 제한되지 않음을 이해하여야 한다. 하기에 설명되는 본 발명의 실시 예는 당업자에게 본 발명의 사상을 충분하게 전달하기 위한 것임에 유의하여야 한다. Hereinafter, preferred embodiments of the present invention will be described in more detail. It should be understood, however, that the invention can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. 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.
[난연제 조성물의 제조][Production of Flame Retardant Composition]
본 발명에서 사용하는 금속 수산화물은 가열 시 물을 잃고 산화알루미늄으로 변화되어 저발연 성질을 갖는 수산화알루미늄(AlOH3)을 사용하며, 난연보조제로 사용하는 비금속 수산화물은 수산화칼슘(calcium hydroxide)(CaOH2)을 이용할 수 있다. 또한, 용제로서는 물을 사용하며, EPS 비드의 표면에 코팅을 용이하게 하고 EPS 비드로 원하는 형상으로 성형 시 EPS 비드간의 결합력을 높이는 접착제로서 초산비닐수지(Polyvinyl Acetate)를 사용한다. 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, water is used as a solvent, and the vinyl acetate resin (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 EPS beads when forming the desired shape as EPS beads.
교반기가 장착된 배합기에 수산화알루미늄 분말 20~40중량부, 팽창흑연 분말 10~40중량부, 액상의 초산비닐수지 18~40중량부, 액상의 경화제 5~10중량부, 물 30~50중량부를 투입한 후 50~150rpm으로 교반기를 회전시켜 10~20분간 혼합한다. 20-40 parts by weight of aluminum hydroxide powder, 10-40 parts by weight of expanded graphite powder, 18-40 parts by weight of liquid vinyl acetate resin, 5-10 parts by weight of liquid curing agent, and 30-50 parts by weight of water After the input, rotate the stirrer at 50 to 150 rpm and mix for 10 to 20 minutes.
이때, 상기 팽창흑연은 밀도가 1~2.5g/㎤이며, 입도는 1~10㎛이며 팽창율은 50~200배내의 것을 사용하는 것이 바람직하다. 상기 팽창된 흑연은 절연층으로 작용하여 열의 이동을 방해한다. 상기 분말형태의 수산화알루미늄과 수산화칼슘의 입 도는 1~10㎛의 것을 사용하여 EPS 비드에 코팅이 용이하게 하는 것이 좋다. At this time, the expanded graphite has a density of 1 ~ 2.5g / cm 3, a particle size of 1 ~ 10㎛ and 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.
상기 금속 수산화물인 수산화알루미늄과 팽창흑연 및 초산비닐수지는 수용성이기 때문에 물에 잘 용해됨으로 배합기의 교반기로 충분히 교반하면 액상상태의 난연제 조성물이 완성된다. Since the aluminum hydroxide, expanded graphite, and vinyl acetate, which are the metal hydroxides, are water-soluble, they are well soluble in water, and when sufficiently stirred with a stirrer of the blender, a liquid flame retardant composition is completed.
또한 상기 교반시간 내에 난연 보조제로서 수산화칼슘 분말 20~30중량부를 추가로 투입 교반하여 난연 효율을 높일 수 있다. 상기 수산화칼슘은 pH 12.5 정도의 강한염기성을 나타내고 있고 고온에서는 산화칼슘(calcium oxide)과 물(H2O)로 분해됨으로써 난연 효율을 높일 수 있다. 이때, 상기 수산화알루미늄 분말과 팽창흑연 분말 및 수산화칼슘 분말의 입도는 1~10㎛의 것을 사용하는 것이 바람직하다. 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 1 ~ 10㎛.
또한 상기 교반시간 내에 EPS 비드에 코팅한 후 금형에 투입하여 원하는 형상으로 성형 시 금형으로부터 성형된 EPS 성형물이 잘 분리될 수 있도록 하는 이형제 2~3중량부를 추가로 투입 교반하여 난연제 조성물을 완성할 수 있다.In addition, after the coating on the EPS beads in the stirring time and added to the mold 2 to 3 parts by weight of the release agent so that the molded EPS molding can be separated from the mold when molding to the desired shape to complete the flame retardant composition can be completed. have.
위와 같은 과정에 의해 조성된 난연제 조성물은 난연성이 양호한 수산화알루미늄, 팽창흑연, 수산화칼슘을 이용하고 용제로서 물을 이용함으로써 저발연성의 성질을 가지며, 연소 시에도 유기용제에 의한 유독가스의 분출이 없게 된다. The flame retardant composition prepared by the above process has low flame retardancy by using aluminum hydroxide, expanded graphite, calcium hydroxide having good flame retardancy and water as a solvent, and there is no emission of toxic gas by organic solvent even during combustion. .
[EPS 비드의 표면에 난연제 조성물의 코팅][Coating of Flame Retardant Composition on Surface of EPS Bead]
난연 EPS 비드 제조는 상기 조성된 난연제 조성물과 EPS 수지입자를 가압식 배치 발포기로 50~80배로 예비 발포하여 얻은 EPS 비드를 1:1의 중량비 로 배합기 의 교반기에 투입하여 50~150rpm의 회전속도로 10~20분 교반하여 상기 EPS 비드의 표면에 상기 난연제를 코팅한다. Flame retardant EPS beads are prepared by pre-expanding 50 to 80 times the flame retardant composition and the EPS resin particles prepared in a pressurized batch foaming machine into a stirrer of the blender in a weight ratio of 1: 1 to 10 at a rotational speed of 50 to 150 rpm. Agitate for 20 minutes to coat the flame retardant on the surface of the EPS beads.
이때, 상기 EPS 비드의 표면에 난연제를 균질하게 코팅하기 위하여 배합기의 교반기의 회전속도를 200~300rpm의 속도로 증가시키는 것을 고려할 수 있다. 교반기의 회전속도가 증가되면 EPS 비드의 표면에 난연제가 보다 균질하게 코팅된다. At this time, in order to uniformly coat the flame retardant on the surface of the EPS bead may be considered to increase the rotational speed of the agitator 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 EPS beads.
팽창흑연, 수산화알루미늄, 수산화칼슘, 초산비닐수지 등을 포함하여 조성된 난연제 조성물을 피막 코팅하여 만들어진 EPS 비드를 공지된 EPS 패널 제조법에 의해서 패널 형상의 성형체를 만든다. EPS beads made by coating a flame retardant composition including expanded graphite, aluminum hydroxide, calcium hydroxide, vinyl acetate resin and the like are made into a panel-shaped molded body by a known EPS panel manufacturing method.
위와 같은 과정에 의해 만들어진 EPS 성형체는 EPS 비드의 표층에 균일하고 단단하게 난연제의 피막이 코팅되어 성형된 패널이 연소 시 EPS 비드에 피막된 표층으로부터 다공성 차(Char : 탄화코어)에 의한 방화층이 형성되어 불연성을 제공한다. 또한, 본 발명의 실시 예에서 적용된 수산화칼슘은 가열 시 고온에서 산화칼슘(calcium oxide)과 물(H2O)로 분해됨으로써 연소를 억제함으로써 성형체가 화염에 전면으로 받더라고 다공성 차에 의한 방화층의 형성과 수산화칼슘의 작용으로 인하여 즉시 소화되며, 열에 의한 더 이상의 형상 붕괴를 억제한다. The EPS molded body produced by the above process is uniformly and hardly coated with a flame retardant coating on the surface layer of the EPS bead, so that a fireproof layer is formed from the surface layer coated on the EPS bead when the molded panel is burned due to a porous difference (Char: carbide core). 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 flame to the front, Due to the formation and action of calcium hydroxide, it is extinguished immediately and suppresses further shape collapse by heat.
수산화알루미늄, 팽창흑연, 수산화칼슘, 초산비닐수지의 조성물에 의해 피막코팅된 EPS 비드로 건축물의 보온단열재나 건축물의 패널 단열재로 성형한 후 건출 물 내부 마감재료의 난연성능기준(건설교통부 고시 제2006-476호, KS F ISO 5660-1)에 따라 난연 테스트를 하였다. Flame retardant performance standard of building interior finishing material after molding into insulation insulation of building or panel insulation of building with EPS bead coated with composition of aluminum hydroxide, expanded graphite, calcium hydroxide, vinyl acetate resin. 476, KS F ISO 5660-1) was tested for flame retardancy.
그 결과 화염을 전면으로 받더라도 내장 재료의 피막에 형성되는 다공성 차에 의한 방화층의 형성으로 적합판정을 받았다. 즉, 총열방출률은 8MJ/㎡이하이고, 방출률이 200Kw/㎡를 초과한 시간(초)은 0초로서 10초 이상의 기준에 적합하였으며, 실재의 전부 용융, 관통하는 균열 및 구멍 등의 변화는 없었다. 가스 유해성시험항목인 평균행동정지시간은 13분 이상으로 9분이상의 규정에 적합하였다. As a result, it was judged to be suitable for the formation of a fireproof layer due to the difference in porosity formed in the coating of the interior material even when the flame was received in front. In other words, the total heat release rate was 8 MJ / ㎡ or less, and the time (seconds) when the release rate exceeded 200 Kw / m 2 was 0 seconds, which satisfied the standard of 10 seconds or more. . 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.
상술한 바와 같은 본 발명의 실시 예에 따른 난연제 조성물은 난연성이 우수한 수산화알루미늄과 팽창 시 다공성의 방화층을 형성하는 팽창흑연, 가열 시 물과 산화칼슘으로 분해되어 발연을 억제하는 수산화칼슘, EPS 비드간의 결합 및 혼합조성물의 피믹형성을 도모하는 초산비닐수지 및 물에 의해 조성함으로써 화재시 발연을 억제하고, 발연 시 연소가스의 발생을 억제함으로써 유해가스의 생성을 억제한다. 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 water, which promotes the formation of the bonds of the bonded and mixed compositions, thereby suppressing smoke during fire and suppressing generation of combustion gas during smoke, thereby suppressing generation of harmful gases.
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