KR20030043291A - Thermoplastic inflammable material composition - Google Patents
Thermoplastic inflammable material composition Download PDFInfo
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- KR20030043291A KR20030043291A KR1020010074372A KR20010074372A KR20030043291A KR 20030043291 A KR20030043291 A KR 20030043291A KR 1020010074372 A KR1020010074372 A KR 1020010074372A KR 20010074372 A KR20010074372 A KR 20010074372A KR 20030043291 A KR20030043291 A KR 20030043291A
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- 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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- 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
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- C08K3/22—Oxides; Hydroxides of metals
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- 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
- C08L23/06—Polyethene
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- C08J2300/00—Characterised by the use of unspecified polymers
- C08J2300/22—Thermoplastic resins
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- 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
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- C08K2003/2224—Magnesium hydroxide
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- 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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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
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Abstract
Description
본 발명은 난연재료 조성물에 관한 것으로, 보다 상세하게는 케이블이나 전선의 시스체로 쓰이는 저발연, 저독성을 가진 열가소성 난연재료 조성물에 관한 것이다.The present invention relates to a flame retardant material composition, and more particularly to a thermoplastic flame retardant material composition having a low smoke, low toxicity used as a sheath of a cable or electric wire.
종래의 선박용 케이블은 그 사용 용도와 장소에 따라 다양한 제품들로 구별된다. 근래 들어 해양 구조물 및 선박에서의 화재시 인명 및 장비들의 보호와 손실을 최소화 시키기 위한 다양한 품질의 케이블 개발들이 이루어지고 있다. 종래의 선박용 케이블은 난연화에 대한 관심과 그 개발들이 적었으나, 근래 들어 그 사용의 범위가 확대되고 선박내 및 부대 시설에서의 화재시 난연 케이블의 용도 및 역할에 대한 관심사가 커지면서 고난연화에 대한 요구가 확대되고 있다.Conventional marine cables are classified into various products depending on their use and place. In recent years, various quality cables have been developed to minimize the protection and loss of life and equipment in the event of fires in offshore structures and ships. Conventional marine cables have had little interest in fire retardant and their development, but in recent years, the scope of their use has expanded and the interest in the use and role of flame retardant cables in fires in ships and auxiliary facilities has increased. The demand is expanding.
기존의 기술에 의하면 선박용 케이블의 난연 등급 중 상위인 IEC 332-3 cat.A급을 만족할 뿐만 아니라 전기적 특성과 연소특성 또한 만족하는 난연재료 및 선박용 케이블이 개발되었다.According to the existing technology, a flame retardant material and a cable for a ship have been developed that satisfies the IEC 332-3 cat.A class, which is the highest flame retardant grade of a ship cable, and also satisfies the electrical and combustion characteristics.
종래의 발명 및 기술에서 적용된 할로겐을 함유한 수지를 베이스로 하는 난연재료는 기계적 물성 및 고난연성을 확보할 수 있었지만 적용재료 자체가 환경친화적이지 않을 뿐만 아니라 베딩체 및 시스체로 적용된 할로겐을 함유한 난연 재료로는 IEC 601034와 같은 저발연 특성을 만족할 수 없었다.Flame-retardant materials based on halogen-containing resins applied in conventional inventions and techniques have secured mechanical properties and high flame retardancy, but the applied materials themselves are not environmentally friendly, and flame retardants containing halogens applied to bedding and sheath bodies. The material could not satisfy low smoke characteristics such as IEC 601034.
이에 대해 보다 진보된 할로겐 프리 난연기술 및 발명에서는 난연성을 확보하기 위하여 금속수화물이나 기타 난연보조제를 다량 적용하였으며 저발연성을 위해서는 연기밀도 억제제를 다량 사용하였다. 일반적으로 연기밀도 억제제로는 징크보레이트와 같은 붕산아연류나 주석류의 보조난연제를 사용하였다. 그러나, 이러한 기술은 난연성 향상에 기여하는 효과가 미미할 뿐만 아니라 발연농도 억제 효과에도 한계를 가지고 있었다. 또한, 재료의 기계적 특성 및 가열 후 특성 값의 저하를 초래하는 문제점이 있었다.In the more advanced halogen-free flame retardant technology and invention, metal hydrates or other flame retardant aids were applied in order to secure flame retardancy, and smoke density inhibitors were used in large amounts for low smoke. In general, secondary smoke retardants such as zinc borate such as zinc borate or tin have been used as smoke density inhibitors. However, this technique has a limited effect on suppressing the smoke concentration as well as the effect of contributing to the improvement of flame retardancy. In addition, there is a problem that causes the mechanical properties of the material and the degradation of the property value after heating.
본 발명은 상기와 같은 문제점을 해결하기 위하여 창작한 것으로서, 본 발명의 목적은 화재시의 안전성을 확보하기 위하여 고난연성, 저발연성 및 저독성을 동시에 가지는 난연재료를 개발하고자 하는 것이다.The present invention has been made to solve the above problems, and an object of the present invention is to develop a flame retardant material having high flame retardancy, low smokeability and low toxicity at the same time in order to ensure safety in fire.
상기와 같은 본 발명의 목적은, 에틸렌비닐 아세테이트 50 ~ 90 중량부, 극성기가 도입된 에틸렌비닐 아세테이트 0 ~ 15 중량부 및 선형저밀도 폴리에틸렌 5 ~ 40 중량부로 구성되는 베이스 수지 100 중량부에 대하여, 수산화 알루미늄 20 ~ 100 중량부, 수산화 마그네슘 40 ~ 130 중량부, 활제 및 가공조제 0.5 ~ 5 중량부, 난연보조제 및 보강제 0.1 ~ 10 중량부 및 산화방지제 0.5 ~ 5 중량부로 구성되는 것을 특징으로 하는 열가소성 난연재료 조성물에 의하여 달성된다.An object of the present invention as described above, hydroxide 50 to 90 parts by weight, based on 100 parts by weight of the base resin consisting of 0 to 15 parts by weight of ethylene vinyl acetate with a polar group introduced and 5 to 40 parts by weight of linear low density polyethylene, 20 to 100 parts by weight of aluminum, 40 to 130 parts by weight of magnesium hydroxide, 0.5 to 5 parts by weight of lubricant and processing aid, 0.1 to 10 parts by weight of flame retardant and reinforcing agent and 0.5 to 5 parts by weight of antioxidant Achieved by the material composition.
본 발명의 종래기술에 대한 차이점을 설명하면, 종래의 기술에서는 난연성을 높이기 위해 수산화 알루미늄, 훈타이트/하이드로마그네사이트 및 적인을 사용하였지만, 본 발명에서는 수산화 알루미늄과 수산화 마그네슘을 사용하였다. 또한, 종래의 기술하에서는 난연성은 향상되나 발연성과 독성이 동시에 높아지는 문제가 있어 이에 IEC 601034의 저발연 특성을 만족하는 재료가 발명되기는 하였으나 보다 심한 규격인 NES 711 저발연 특성과 저독성 특성은 만족하지 못하였다. 이에 대해 본 발명에 의한 난연재료는 고난연성, 저발연성 및 저독성을 동시에 만족할 수 있는 시스재료에 관한 것이다.When explaining the difference between the prior art of the present invention, in the prior art, aluminum hydroxide, huntite / hydromagnesite and red are used to increase the flame retardancy, but in the present invention, aluminum hydroxide and magnesium hydroxide were used. In addition, under the conventional technology, the flame retardancy is improved, but there is a problem that smoke and toxicity increase simultaneously. Therefore, a material satisfying the low smoke characteristics of IEC 601034 was invented, but the more severe NES 711 low smoke characteristics and low toxicity characteristics were not satisfied. It was. On the other hand, the flame retardant material according to the present invention relates to a sheath material that can satisfy both high flame retardancy, low smoke resistance and low toxicity at the same time.
본 발명에서는 기존의 기술과 차별되게 극성기의 함량이 높지 않은 베이스 수지와 열분해 거동이 서로 다른 두 종류 이상의 무기난연제를 혼용하고 종래 기술에서 널리 사용하던 적인을 배제함으로써 난연성, 저발연 특성 및 저독성을 만족하였다. 그리고, 주 난연성을 확보하기 위하여 열분해 거동이 다른 두 종류의 수화 금속화합물로 표면 처리되지 않은 수산화 알루미늄과 수산화 마그네슘을 혼용하여 사용하였다.The present invention satisfies flame retardancy, low smoke characteristics and low toxicity by using a base resin that does not have a high polar group content and two or more types of inorganic flame retardants having different thermal decomposition behaviors, and excluding those widely used in the prior art, in contrast to conventional technologies. It was. In order to secure the main flame retardancy, aluminum hydroxide and magnesium hydroxide which were not surface treated with two kinds of hydrated metal compounds having different pyrolysis behavior were used in combination.
본 발명의 그 밖의 목적, 특정한 장점 및 신규한 특징들은 이하의 발명의 상세한 설명과 바람직한 실시예로부터 더욱 분명해질 것이다.Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description of the invention and the preferred embodiments.
이하 본 발명에 따른 열가소성 난연재료 조성물의 구성에 대하여 설명하기로 한다.Hereinafter, the configuration of the thermoplastic flame retardant composition according to the present invention will be described.
상기 열가소성 난연재료 조성물은 베이스 수지 100 중량부에 대하여, 수산화알루미늄 20 ~ 100 중량부, 수산화 마그네슘 40 ~ 130 중량부, 활제 및 가공조제 0.5 ~ 5 중량부, 난연보조제 및 보강제 0.1 ~ 10 중량부 및 산화방지제 0.5 ~ 5 중량부로 구성된다.The thermoplastic flame retardant composition is based on 100 parts by weight of the base resin, 20 to 100 parts by weight of aluminum hydroxide, 40 to 130 parts by weight of magnesium hydroxide, 0.5 to 5 parts by weight of lubricant and processing aids, 0.1 to 10 parts by weight of flame retardant aids and reinforcing agents and It consists of 0.5 to 5 parts by weight of antioxidant.
상기 베이스 수지로서는 상이한 물성과 화학구조를 갖는 3종의 서로 다른 수지들을 혼용하여 사용하였는 바, 상기 베이스 수지는 에틸렌비닐 아세테이트 50 ~ 90 중량부, 극성기가 도입된 에틸렌비닐 아세테이트 0 ~ 15 중량부 및 선형저밀도 폴리에틸렌 5 ~ 40 중량부로 구성되어 있다. 상기 에틸렌비닐 아세테이트의 비닐아세테이트의 함량은 20 ~ 50 wt%이며, 상기 극성기가 도입된 에틸렌비닐 아세테이트의 극성기의 함량은 0.5 ~ 2wt%이고, 비닐아세테이트의 함량은 14 ~ 33wt%이다.As the base resin, three different resins having different physical properties and chemical structures were used in combination, and the base resin was 50 to 90 parts by weight of ethylene vinyl acetate, 0 to 15 parts by weight of ethylene vinyl acetate having a polar group introduced therein, and It consists of 5 to 40 parts by weight of linear low density polyethylene. The content of vinyl acetate of the ethylene vinyl acetate is 20 to 50 wt%, the content of the polar group of the ethylene vinyl acetate in which the polar group is introduced is 0.5 to 2wt%, and the content of vinyl acetate is 14 to 33wt%.
상기 수산화 알루미늄은 20 ~ 100 중량부를 사용하였는 바, 20 중량부 이하에서는 혼용된 수산화 마그네슘과의 난연 상승효과 및 탄화층의 고형화 효과를 얻을 수 없었고, 인장강도의 상승효과를 얻을 수 없었다. 100 중량부 이상에서는 다량의 수산화 알루미늄에 의한 난연상승 효과가 크지 않았으며 신장율이 저하되었다.20 to 100 parts by weight of the aluminum hydroxide was used. At 20 parts by weight or less, a synergistic effect of flame retardation with the mixed magnesium hydroxide and a solidification effect of the carbonized layer could not be obtained, and a synergistic effect of tensile strength could not be obtained. At 100 parts by weight or more, the effect of increasing flame retardancy by a large amount of aluminum hydroxide was not large, and the elongation was decreased.
상기 수산화 마그네슘은 40 ~ 130 중량부를 사용하였는 바, 40 중량부 이하에서는 수화화합물의 혼용에 의한 난연상승효과가 적었고, 130 중량부 이상에서는 기계적 강도가 저하되고 탄화층의 고형화가 작았다.40 to 130 parts by weight of the magnesium hydroxide was used, less than 40 parts by weight of the flame retardant increase effect due to the mixing of the hydration compound, mechanical strength was lowered and solidification of the carbonized layer was less than 130 parts by weight.
또한, 상기 수산화 알루미늄과 수산화 마그네슘은 수화금속 화합물들로 표면처리된 수산화 알루미늄과 수산화 마그네슘 혼용물 70 ~ 170 중량부로 대체하여 구성될 수도 있다.In addition, the aluminum hydroxide and magnesium hydroxide may be configured by replacing 70 to 170 parts by weight of a mixture of aluminum hydroxide and magnesium hydroxide surface-treated with metal hydroxide compounds.
상기 활제 및 가공조제는 0.1 ~ 5 중량부를 사용하였는 바, 활제의 함량이 0.1 중량부 이하에서는 재료의 점도저하에 의한 가공성 향상을 기대할 수 없었으며, 5 중량부 이상에서는 난연성과 저발연성 및 인장강도가 저하되었다.Since the lubricant and the processing aid used 0.1 to 5 parts by weight, the lubricant content could not be expected to improve the processability by lowering the viscosity of the material when the content of the lubricant is 0.1 parts by weight or less, and at 5 parts by weight or more, flame retardancy and low smoke properties and tensile strength Was lowered.
그리고, 상기 보조난연제로서는 실리콘을 1 ~ 5 중량부를 사용하여 난연성을 보강하였다.In addition, as the auxiliary flame retardant, 1 to 5 parts by weight of silicone was used to reinforce flame retardancy.
본 발명에 따른 저발연성 난연재료는 연기밀도(smoke index) 25 미만을 만족할 뿐만 아니라 할로겐 함량 0.2 %의 할로겐 프리 특성과 5 이하의 독성 지수를 만족하는 할로겐 프리 난연재료에 대한 것이다.The low-flammable flame retardant material according to the present invention relates to a halogen-free flame retardant material that not only satisfies a smoke index of less than 25 but also satisfies a halogen-free property of 0.2% halogen and a toxicity index of 5 or less.
또한, 본 발명에 의한 난연재료는 선박용 케이블의 시스체로 적용되어 케이블 완제품에서 IEC 332-3 cat.A의 난연등급을 만족할 뿐만 아니라 저발연 특성인 IEC 601034와 NES 711을 만족하는 할로겐 프리 난연시스 재료에 관한 것이다. 또한, 본 발명에 따른 난연재료는 MIL-C-24643의 독성지수 시험결과 기존의 할로겐 난연재료 또는 비할로겐 난연재료에 대하여 우수한 저독성 특성을 갖는 케이블의 시스재료에 대한 것이다.In addition, the flame retardant material according to the present invention is applied to the sheath of the ship cable, not only satisfies the flame retardant grade of IEC 332-3 cat.A in the finished cable, but also halogen-free flame retardant sheath material that satisfies the low smoke characteristics IEC 601034 and NES 711 It is about. In addition, the flame retardant material according to the present invention relates to the sheath material of the cable having excellent low toxicity properties against the existing halogen flame retardant material or non-halogen flame retardant material according to the toxicity index test of MIL-C-24643.
이하 상기와 같은 구성을 갖는 본 발명에 따른 열가소성 난연재료 조성물의 실시예에 대하여 설명하기로 한다. 표 1에서는 각 실시예에 따른 난연재료 조성물의 배합비를 나타내었으며, 표 2에서는 각 실시예에 따른 물성평가 결과를 나타내었다.Hereinafter, an embodiment of the thermoplastic flame retardant composition according to the present invention having the configuration as described above will be described. Table 1 shows the mixing ratio of the flame retardant material composition according to each embodiment, Table 2 shows the results of the physical property evaluation according to each embodiment.
본 실시예 1 ~ 5에서는 에틸렌비닐 아세테이트 공중합체와 선형저밀도 폴리에틸렌을 혼용하여 베이스 수지로 사용하였다. 에틸렌비닐 아세테이트 공중합체 수지에 탄화층의 고형화를 촉진시키고 발연농도의 억제를 위해 수산화 알루미늄과 수산화 마그네슘을 주난연제로 하고 보조난연제로 실리콘을 사용하였다. 상기의 실시예들은 에틸렌비닐 아세테이트, 선형저밀도 폴리에틸렌, 수화알루미늄과 수화마그네슘을 인자로 하는 실험계획법에 의거한 실시예이다.In Examples 1 to 5, ethylene vinyl acetate copolymer and linear low density polyethylene were mixed and used as the base resin. In order to promote solidification of the carbonized layer and to suppress the smoke concentration in ethylene vinyl acetate copolymer resin, aluminum hydroxide and magnesium hydroxide were used as main flame retardants and silicon was used as an auxiliary flame retardant. The above examples are based on an experimental design method based on ethylene vinyl acetate, linear low density polyethylene, aluminum hydrate and magnesium hydrate.
비교예 A와 B의 경우는 실시예와 비교하여 적인을 첨가한 것으로, 적인이 난연재료에서 난연성과 발연성에 미치는 영향 및 다른 기계적, 열적 특성에 미치는 영향을 실시예와 비교하였다. 또한, 비교예 C에서는 수산화알루미늄과 훈타이트/하이드로 마그네사이트를 적용한 재료의 난연성, 독성 등을 비교하였다.In the case of Comparative Examples A and B, the addition of the droplets was compared with the examples, and the effects of the droplets on the flame retardancy and the smoke retardancy and other mechanical and thermal properties in the flame retardant materials were compared with the Examples. In Comparative Example C, flame retardancy, toxicity, and the like of the material to which aluminum hydroxide and hunite / hydromagnesite were applied were compared.
이상의 실시예와 비교예에서 언급한 난연재료들은 오픈롤에서 믹싱 후 170℃에서 5분간 성형 후 시험용 시편을 제조하여 특성들을 평가하였다. 시험용 시편으로서 케이블을 제조한 후 IEC 332-3 cat.A의 난연시험과 IEC 601034 시험과 NES 711의 연기밀도 시험을 실시하였다.The flame retardant materials mentioned in Examples and Comparative Examples were mixed in an open roll and then molded at 170 ° C. for 5 minutes to prepare test specimens for evaluation of properties. After the cables were manufactured as test specimens, flame retardant tests of IEC 332-3 cat.A, IEC 601034 tests, and smoke density tests of NES 711 were conducted.
본 발명에 따른 실시예와 비교예에서와 같은 재료를 적용한 케이블에 대한 난연시험을 한 결과 연소길이는 모두 1.5미터 미만의 연소특성을 보였다.As a result of the flame-retardant test of the cable with the same material as in the embodiment and the comparative example according to the present invention, the combustion length showed combustion characteristics of less than 1.5 meters.
그러나, 비교예와 같이 적인을 사용하면 연기밀도(smoke index)가 2배 가량 증가하는 특성을 보였다. 또한, 비교예 C와 같이 수산화 알루미늄과 훈타이트 및 하이드로 마그네사이트를 사용한 난연재료의 경우에는 독성지수가 현저히 증가하는 결과를 나타내었다.However, when the enemy is used as in the comparative example, the smoke index increased by about 2 times. In addition, in the case of the flame-retardant material using aluminum hydroxide, huntite and hydromagnesite as in Comparative Example C, the toxicity index was markedly increased.
또한, 본 발명에 적용된 난연시스템은 혼용된 수화 금속화합물들 간의 난연상승 효과가 촉진되어 높은 산소지수 값을 나타내었으며 탄화된 재 또한 고형화된딱딱한 형상을 보였다.In addition, the flame retardant system applied to the present invention exhibited a high oxygen index value by promoting the flame retardant increase effect between the mixed metal hydride compounds, and the carbonized ash also showed a solidified solid shape.
1) 난연성 : IEC 332-3 cat.A 의 난연시험 규격에 준하여 시험하였다. 70,000 Btu/hr의 열량을 40분간 가한다. 연소 시험 후 케이블의 연소 길이는 2.44m 이하이어야 한다.1) Flame retardant: Tested according to the flame retardant test standard of IEC 332-3 cat.A. Apply 70,000 Btu / hr of heat for 40 minutes. After the combustion test, the combustion length of the cable shall be less than 2.44m.
2) 연기밀도 : NES 711에(Heat flux : 2.5 W/cm2) 준하여 평가하였으며 플레이밍(flamming) 방법에 의한 연기밀도 값을 표시하였다.2) Smoke density: It was evaluated according to NES 711 (Heat flux: 2.5 W / cm 2 ), and the smoke density value by flamming method was indicated.
시편규격 : 7.5 cm ×7.5 cm ×3 mmSpecimen Size: 7.5 cm × 7.5 cm × 3 mm
3) 상온특성 : ASTM D638에 준하여 인장강도 및 신장율을 측정하였다.3) Room temperature characteristics: Tensile strength and elongation were measured according to ASTM D638.
4) 내열특성 : ASTM D638에 준하여 100℃에서 168시간 열처리 후 인장강도 및 신장율을 측정하였다.4) Heat resistance: Tensile strength and elongation were measured after heat treatment at 100 ° C for 168 hours according to ASTM D638.
5) 발연성 : IEC 1034에 준하여 케이블 완제품 상태로 시험을 하였다. 투과율 60% 이상을 만족하여야 한다.5) Smokeability: Tested in the state of finished cable according to IEC 1034. Transmittance should be over 60%.
6) 산소지수 : ASTM D2863에 준하여 시험을 하였다.6) Oxygen index: It was tested according to ASTM D2863.
7) 독성지수 : MIL-C-24643에 준하여 시험을 하였다.7) Toxicity Index: Tested according to MIL-C-24643.
상기 언급한 바와 같이 본 발명에 따른 열경화성 난연재료 조성물에 의하면, IEC 332-3 cat.A 난연등급과 IEC 601034, NES 711에 따른 저발연 특성을 만족하는 등 난연성, 저발연성을 만족하며, 독성에 있어서도 종래에 대비하여 50% 이상 현저히 감소되는 특징이 있다.As mentioned above, according to the thermosetting flame retardant composition according to the present invention, it satisfies flame retardancy and low smokeability, such as satisfactory flame retardancy according to IEC 332-3 cat.A flame retardant grade and IEC 601034, NES 711. Even when compared to the prior art has a feature that is significantly reduced by more than 50%.
비록 본 발명이 상기 언급된 바람직한 실시예와 관련하여 설명되어졌지만,발명의 요지와 범위로부터 벗어남이 없이 다양한 수정이나 변형을 하는 것이 가능하다. 따라서 첨부된 특허청구범위는 본 발명의 요지에 속하는 이러한 수정이나 변형을 포함한다.Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Accordingly, the appended claims include such modifications and variations as fall within the spirit of the invention.
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| WO2009119942A1 (en) * | 2008-03-28 | 2009-10-01 | Ls Cable Ltd. | Halogen-free flame retardant composition for cable and cable using the same |
| US8992681B2 (en) | 2011-11-01 | 2015-03-31 | King Abdulaziz City For Science And Technology | Composition for construction materials manufacturing and the method of its production |
| US9085678B2 (en) | 2010-01-08 | 2015-07-21 | King Abdulaziz City For Science And Technology | Clean flame retardant compositions with carbon nano tube for enhancing mechanical properties for insulation of wire and cable |
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| KR900007930A (en) * | 1988-11-07 | 1990-06-02 | 문박 | Thermoplastic Flame Retardant Resin Composition |
| KR0136063B1 (en) * | 1994-03-03 | 1998-04-25 | 박원근 | Compound composition of cable |
| JP2919277B2 (en) * | 1994-09-20 | 1999-07-12 | 古河電気工業株式会社 | Crosslinked polyolefin resin foam and heat insulating pipe cover using the same |
| KR100239581B1 (en) * | 1996-12-30 | 2000-01-15 | 이정국 | Insulating material for electric wire |
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| WO2009119942A1 (en) * | 2008-03-28 | 2009-10-01 | Ls Cable Ltd. | Halogen-free flame retardant composition for cable and cable using the same |
| US9085678B2 (en) | 2010-01-08 | 2015-07-21 | King Abdulaziz City For Science And Technology | Clean flame retardant compositions with carbon nano tube for enhancing mechanical properties for insulation of wire and cable |
| US8992681B2 (en) | 2011-11-01 | 2015-03-31 | King Abdulaziz City For Science And Technology | Composition for construction materials manufacturing and the method of its production |
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