KR100972667B1 - Polypropylene compound composition having quality of heat stroage and radiation, and its products - Google Patents
Polypropylene compound composition having quality of heat stroage and radiation, and its products Download PDFInfo
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- KR100972667B1 KR100972667B1 KR1020090054764A KR20090054764A KR100972667B1 KR 100972667 B1 KR100972667 B1 KR 100972667B1 KR 1020090054764 A KR1020090054764 A KR 1020090054764A KR 20090054764 A KR20090054764 A KR 20090054764A KR 100972667 B1 KR100972667 B1 KR 100972667B1
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- -1 Polypropylene Polymers 0.000 title claims abstract description 29
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 27
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 27
- 239000000203 mixture Substances 0.000 title claims abstract description 19
- 150000001875 compounds Chemical class 0.000 title description 3
- 230000005855 radiation Effects 0.000 title 1
- 239000012188 paraffin wax Substances 0.000 claims abstract description 25
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 19
- 229920003048 styrene butadiene rubber Polymers 0.000 claims abstract description 12
- 229920001971 elastomer Polymers 0.000 claims description 9
- 239000005060 rubber Substances 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 239000001993 wax Substances 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 abstract description 3
- 238000005338 heat storage Methods 0.000 abstract description 3
- 229920000573 polyethylene Polymers 0.000 abstract description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 2
- 230000003578 releasing effect Effects 0.000 abstract description 2
- 239000004677 Nylon Substances 0.000 abstract 2
- 229920001778 nylon Polymers 0.000 abstract 2
- 229920000139 polyethylene terephthalate Polymers 0.000 abstract 2
- 239000005020 polyethylene terephthalate Substances 0.000 abstract 2
- 239000004417 polycarbonate Substances 0.000 abstract 1
- 229920000515 polycarbonate Polymers 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 6
- 229920003002 synthetic resin Polymers 0.000 description 5
- 239000000057 synthetic resin Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 2
- 238000012300 Sequence Analysis Methods 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000000113 differential scanning calorimetry Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- 238000002076 thermal analysis method Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000012782 phase change material Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
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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
- 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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
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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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
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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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
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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
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
- C08L91/06—Waxes
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
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Abstract
본 발명은 열저장 및 방출 특성을 갖는 폴리프로필렌 조성물 및 이의 제품에 관한 것으로, 보다 상세하게는 폴리프로필렌(PP), 폴리에틸렌(PE), 폴리에틸렌테레프탈레이트(PET), 나일론(Nylon), 폴리카보네이트(PC) 등의 합성수지 100 중량부에 니트릴부타디엔러버(NBR) 또는 스티렌부타디엔러버(SBR) 10~50 중량부, 파라핀왁스 또는 염화파라핀 10~80 중량부로 이루어진다. 본 발명에 따른 조성물은 각종 산업용 및 가정용 조성물로 가능하며 특별히 용도를 한정하는 것은 아니지만, 사용 환경에 있어서 발열 작용으로 인하여 성능저하가 우려되는 경우 열을 적절히 흡수 및 방출하는 특성을 갖는 것으로 밧데리 케이스, 핸드폰 케이스, 노트북 케이스, 방열판 등에 사용할 수 있다. The present invention relates to a polypropylene composition and a product thereof having heat storage and release properties, and more particularly, to polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), nylon (Nylon), polycarbonate ( It consists of 10-50 parts by weight of nitrile butadiene rubber (NBR) or styrene butadiene rubber (SBR), and 100 to 80 parts by weight of paraffin wax or paraffin chloride. The composition according to the present invention can be used in various industrial and household compositions, and the use thereof is not particularly limited. However, the battery case may have a characteristic of absorbing and releasing heat appropriately when performance is deteriorated due to exothermic action in the use environment. It can be used for cell phone cases, laptop cases, heat sinks, etc.
Description
본 발명은 열저장 및 방출 특성을 갖는 폴리프로필렌 조성물 및 이의 제품에 관한 것으로 보다 상세하게는 열가소성 폴리프로필렌 100 중량부에 니트릴부타디엔러버(NBR) 또는 스티렌부타디엔러버(SBR) 10~50 중량부, 파라핀왁스 또는 염화파라핀 10~80 중량부로 이루어진 조성물로 특별히 용도를 한정하는 것은 아니지만, 사용 환경에 있어서 발열 작용으로 인하여 성능저하가 우려되는 경우 열을 적절히 흡수 저장 및 방출하는 특성을 갖는 것으로 밧데리 케이스, 핸드폰 케이스, 노트북 케이스, 방열판 등에 사용할 수 있다. The present invention relates to a polypropylene composition having heat storage and releasing properties, and more particularly, to 10 parts by weight of nitrile butadiene rubber (NBR) or styrene butadiene rubber (SBR) in 100 parts by weight of thermoplastic polypropylene, and paraffin. It is a composition composed of 10 to 80 parts by weight of wax or paraffin chloride, but the use thereof is not particularly limited. However, if the performance is deteriorated due to the exothermic action in the use environment, it has the property of properly absorbing and storing heat and discharging the battery. It can be used for cases, laptop cases, heat sinks, etc.
일반적으로 합성수지 조성물에 융점이 다르거나 용융시 서로 혼합되어 서로 섞일 수 있는 상용성이 적은 물질을 사용하는 경우 압축강도, 굴곡강도 등 기계적 물성이 나빠지므로 잘 사용하지 않는다. In general, when a synthetic resin composition has a low melting point or a material having low compatibility with each other when mixed with each other when melted, the mechanical properties such as compressive strength and flexural strength deteriorate.
특히 파라핀왁스로 불리는 곧은 사슬 탄화수소 혼합물의 경우 융점이 48~66℃ 영역이지만 용도에 따라 증류 재결정과정을 거쳐 녹는 영역을 세분할 수 있고, 이와같은 파라핀왁스는 용융 및 응고되면서 흡수 및 방출하는데 그 열량 변화를 시차주사열분석기로 분석한 결과 210J/g으로 매우 높은 열량을 갖는 상변화물질에 해당된다. 또한 정제된 파라핀왁스는 용융시 투명한 무색 액체로 취기를 나타내지 않으며 접착성이 없고 윤활성이 있어 이형제, 코팅제, 광택제, 전기절연체 등으로 사용된다. 석탄가스를 탄화수소로 바꾸는 방법을 사용한 합성 파라핀왁스 생산공정으로 얻어진 염화파라핀은 폴리에틸렌 같은 합성수지의 변형제로 사용되기도 하였다.Especially in the case of straight chain hydrocarbon mixture called paraffin wax, melting point is 48 ~ 66 ℃, but it can be subdivided into melting zone through distillation recrystallization process depending on the use. Such paraffin wax is absorbed and released as it melts and solidifies. The change was analyzed by differential scanning calorimetry and it was 210J / g, which is a phase change material with very high calorific value. In addition, the purified paraffin wax is a transparent colorless liquid when melted, does not exhibit odor, adhesiveness and lubricity and is used as a release agent, coating agent, varnish, electrical insulator and the like. Synthetic paraffin wax obtained by converting coal gas into hydrocarbon has been used as a modifier of synthetic resin such as polyethylene.
파라핀왁스의 상변화특성을 이용하면 48~66℃ 영역에서 발생하는 열을 흡수저장하기도 하며 방출하는 특성을 갖는 열저장 물질로 활용이 가능하지만 윤활성을 갖기 때문에 상용성이 낮아 합성수지에 적용이 어려웠다. By using the phase change characteristic of paraffin wax, it can absorb and store the heat generated in the 48 ~ 66 ℃ range and can be used as a heat storage material having the characteristic of being released, but it is difficult to apply to synthetic resin because of its low compatibility.
파라핀왁스는 일반적인 열가소성 합성수지와는 융점이 50℃ 이상 차이가 나며 용융시 점도가 낮고 흐름성이 좋을 뿐만 아니라 윤활성을 가지므로 합성수지 조성물에 많은 양을 혼입할 수 없었다. The paraffin wax has a melting point of 50 ° C. or higher than a general thermoplastic resin, and has a low viscosity and good flowability when melted, and has a lubricating property. Therefore, a large amount of paraffin wax could not be incorporated into the synthetic resin composition.
특히 압출이나 사출과정에서 익스트루더의 온도는 합성수지의 융점 이상으로 가열되어지지만 익스트루더의 온도가 70℃만 되어도 파라핀왁스는 점성을 잃고 유동성이 매우 높은 액체로 되어 흐르게 되므로 합성수지와 과량의 파라핀왁스를 혼합하는 것은 불가능하였다. In particular, the extruder's temperature is heated above the melting point of the resin during extrusion or injection.However, even if the extruder's temperature is only 70 ° C, the paraffin wax loses its viscosity and flows into a highly fluid liquid. It was not possible to mix the wax.
이상과 같은 문제를 해결하기 위하여 니트릴부타디엔러버(NBR)나 스티렌부타 디엔러버(SBR)에 파라핀왁스를 혼합하는 방법을 사용하였다. 대부분의 고무는 오일을 흡수하는 능력이 매우 좋으며 특히 합성고무인 니트릴부타디엔러버(NBR)나 스티렌부타디엔러버(SBR)는 중량비로 120% 까지 오일을 흡수할 수 있다.In order to solve the above problems, a method of mixing paraffin wax with nitrile butadiene rubber (NBR) or styrene butadiene rubber (SBR) was used. Most rubbers have a very good ability to absorb oil, especially synthetic rubber nitrile butadiene rubber (NBR) and styrene butadiene rubber (SBR), which can absorb up to 120% by weight.
이와 같은 니트릴부타디엔러버(NBR)나 스티렌부타디엔러버(SBR)의 특성을 이용하여 수퍼믹서에 니트릴부타디엔러버(NBR)나 스티렌부타디엔러버(SBR)를 넣고 파라핀왁스를 넣은 후 30분 이상을 교반하면 니트릴부타디엔러버(NBR)나 스티렌부타디엔러버(SBR)에 파라핀왁스가 녹아 들어가게 된다.Using nitrile butadiene rubber (NBR) or styrene butadiene rubber (SBR), nitrile butadiene rubber (NBR) or styrene butadiene rubber (SBR) is added to the supermixer, and paraffin wax is added. Paraffin wax is dissolved in butadiene rubber (NBR) or styrene butadiene rubber (SBR).
또한 합성수지는 니트릴부타디엔러버(NBR)나 스티렌부타디엔러버(SBR)와 같은 고무 재질과는 상용성을 갖으므로 파라핀왁스가 녹아든 러버를 폴리프로필렌와 혼합하여 압출하거나 압출된 컴파운드를 사출하는 것이 가능하다. In addition, synthetic resins are compatible with rubber materials such as nitrile butadiene rubber (NBR) and styrene butadiene rubber (SBR), so that the rubber in which paraffin wax is dissolved can be mixed with polypropylene and extruded or extruded compound.
상술한 본 발명에 따른 폴리프로필렌 조성물을 이용한 제품은 모터, 핸드폰, 노트북 등과 같이 전기, 전자제품의 사용에 따른 발열작용이 과도하게 일어나 사용에 제약을 받게 될 때, 발생 된 열을 신속히 흡수 저장하였다가 방출하도록 함으로써 기기의 손상이나 사용제한을 막을 뿐만 아니라 열적 부하의 변동 강도를 줄여줌으로써 기기 및 제품의 수명을 연장할 수 있도록 도와준다. 가령 폴리프로필렌 제품이 자연에 노출된 경우 태양열이 영향을 미치는 주간에는 열을 받아 뜨거워지지만 야간에는 냉각되는데, 이때 파라핀왁스가 들어 있는 경우 주간에 폴리프로필렌의 온도는 파라핀왁스가 열을 흡수 저장하여 가열되는 시간이 지연되며, 야간에는 용융되어 있던 파라핀왁스가 응고되며 열을 방출하므로 냉각되는 기간이 길어지게 된다. 따라서 가열 및 냉각기간이 지연되며, 파라핀왁스의 용량증가시 온도 편차를 거의 없앨 수 있으므로 열적 부하의 반복으로 인한 폴리프로필렌의 물성저하를 막을 수도 있다.When the product using the polypropylene composition according to the present invention described above is excessively exothermic due to the use of electric and electronic products such as a motor, a mobile phone, a notebook, and is restricted in use, the generated heat is quickly absorbed and stored. This prevents damage to the device and limits on its use, as well as reducing the intensity of fluctuations in thermal loads, helping to prolong the life of the device and product. For example, when a polypropylene product is exposed to nature, it is heated and heated during the day when solar heat is affected, but it is cooled at night.In the case of paraffin wax, the temperature of the polypropylene during the day is absorbed by paraffin wax to absorb and store heat. At this time, the molten paraffin wax is solidified at night and releases heat, which increases the cooling period. Therefore, the heating and cooling periods are delayed, and the temperature variation can be almost eliminated when the capacity of paraffin wax is increased, thereby preventing the degradation of the properties of polypropylene due to repeated thermal loads.
폴리프로필렌에 파라핀왁스 고무를 넣고 슈퍼믹서로 30분간 강하게 교반한 후 트윈압출기에 넣어 압출하여 펠렛화 하였으며 이렇게 얻어진 펠렛을 압출 및 사출하여 원하는 제품을 얻도록 한다.Paraffin wax rubber was added to polypropylene, and then stirred vigorously with a super mixer for 30 minutes, and then extruded and pelletized in a twin extruder. The obtained pellet was extruded and injected to obtain a desired product.
실시예1Example 1
폴리프로필렌 수지 100중량부에 스티렌부타디엔러버(SBR) 40중량부, 파라핀왁스 40중량부, 탈크 20 중량부를 넣고 수퍼믹서에서 30분간 강하게 교반하여 얻어진 혼합물을 트윈압출기로 펠렛화 하였다. 또 이 과정을 통하여 얻어진 펫렛을 시편용 사출기로 시편을 제작하여 물성을 측정한 결과는 다음과 같았다.40 parts by weight of styrene butadiene rubber (SBR), 40 parts by weight of paraffin wax, and 20 parts by weight of talc were added to 100 parts by weight of polypropylene resin, and the mixture obtained by vigorous stirring in a supermixer for 30 minutes was pelletized by a twin extruder. In addition, the result of measuring the physical properties of the pellets obtained through this process using the specimen injection machine was as follows.
kgf/cmIzod impact strength
kgf / cm
MPa
The tensile strength
MPa
MPa
Flexural strength
MPa
MPaModulus
MPa
실시예2Example 2
또 폴리프로필렌 수지 100중량부에 스티렌부타디엔러버(SBR) 60중량부, 스테아린산 30중량부, 탈크 10중량부를 수퍼믹서에서 강하게 30분간 교반한 혼합물을 트윈압출기로 펠렛화하여 시편용 사출기로 시편을 제작, 물성을 측정한 결과는 다음과 같다. In addition, 100 parts by weight of polypropylene resin, 60 parts by weight of styrene-butadiene rubber (SBR), 30 parts by weight of stearic acid, and 10 parts by weight of talc were pelletized by a twin extruder, and the test piece was prepared by using a specimen extruder. The measurement results of the physical properties are as follows.
kgf/cmIzod impact strength
kgf / cm
MPa
The tensile strength
MPa
MPa
Flexural strength
MPa
MPaModulus
MPa
실시 예1의 열 흡수 및 방출 특성을 시차주사열량계로 분석한 결과를 그림1과 그림2에 나타내었다. The heat absorption and release characteristics of Example 1 were analyzed with a differential scanning calorimeter.
실시 예2의 열 흡수 및 방출 특성을 시차주사열량계로 분석한 결과를 그림3, 그림4에 나타내었다.The heat absorption and release characteristics of Example 2 were analyzed by differential scanning calorimetry.
그림1에서 보는 바와 같이 실시예1의 폴리프로필렌 조성물은 55℃에서 24.6J/g으로 열을 흡수하며 그림2에서 보는 바와 같이 응고될 때 24.4J/g의 열을 방출하는 것을 알 수 있다. As shown in Fig. 1, the polypropylene composition of Example 1 absorbs heat at 24.6 J / g at 55 ° C and releases 24.4 J / g of heat when solidified as shown in Fig. 2.
또 그림3에서 보는 바와 같이 실시예2의 폴리프로필렌 조성물은 120℃ 영역에서 적은 양의 열 흡수가 일어 났으나 열적으로는 거의 의미 없는 양이었으며, 그림4에서 보는 바와 같이 응고시에는 일반 폴리프로필렌과 같은 양상을 나타 내었다.In addition, as shown in Fig. 3, the polypropylene composition of Example 2 had a small amount of heat absorption in the region of 120 ° C., but was almost insignificant thermally. The same aspect was shown.
따라서 표와 그림에서 보는 바와 같이 파라핀 왁스를 혼합한 조성물은 열의 흡수 및 방출 특성을 갖으며 고무계 화합물을 부가함으로써 열가소성 폴리프로필렌와 잘 결합하여 요구하는 물성을 갖는 폴리프로필렌 조성물을 얻을 수 있다는 사실을 확인하였다.Therefore, as shown in the table and the figure, it was confirmed that the mixture of paraffin wax has heat absorption and release characteristics, and by adding a rubber compound, a polypropylene composition having a desired physical property can be obtained by combining with a thermoplastic polypropylene. .
제1도는 실시 예1의 열흡수 시차주사열분석 결과도 1 is a heat absorption differential scanning thermal analysis results of Example 1
제2도는 실시 예1의 열방출 시차주사열분석 결과도2 is a thermal emission differential scanning sequence analysis of Example 1
제3도는 실시 예2의 열흡수 시차주사열분석 결과도3 is a heat absorption differential scanning thermal analysis results of Example 2
제4도는 실시 예2의 열방출 시차주사열분석 결과도4 is a result of the thermal emission differential scanning sequence analysis of Example 2
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5023301A (en) * | 1990-03-05 | 1991-06-11 | The Goodyear Tire & Rubber Company | Polypropylene reinforced rubber |
| KR920012279A (en) * | 1990-12-17 | 1992-07-25 | 공정곤 | Electroconductive Composite Resin Composition for Electromagnetic Shielding |
| KR20010051044A (en) * | 1999-10-20 | 2001-06-25 | 후지 폴리머 인더스트리즈 가부시키가이샤 | Thermally conductive composition and method of forming thermally conductive film with use of same |
| US6906144B2 (en) | 2003-03-27 | 2005-06-14 | Hyundai Motor Company | Polypropylene-based resin composition for powder slush molding |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5023301A (en) * | 1990-03-05 | 1991-06-11 | The Goodyear Tire & Rubber Company | Polypropylene reinforced rubber |
| KR920012279A (en) * | 1990-12-17 | 1992-07-25 | 공정곤 | Electroconductive Composite Resin Composition for Electromagnetic Shielding |
| KR20010051044A (en) * | 1999-10-20 | 2001-06-25 | 후지 폴리머 인더스트리즈 가부시키가이샤 | Thermally conductive composition and method of forming thermally conductive film with use of same |
| US6906144B2 (en) | 2003-03-27 | 2005-06-14 | Hyundai Motor Company | Polypropylene-based resin composition for powder slush molding |
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