KR100574287B1 - Polypropylene resin composition excellent in rigidity and impact resistance - Google Patents

Polypropylene resin composition excellent in rigidity and impact resistance Download PDF

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KR100574287B1
KR100574287B1 KR1019980062148A KR19980062148A KR100574287B1 KR 100574287 B1 KR100574287 B1 KR 100574287B1 KR 1019980062148 A KR1019980062148 A KR 1019980062148A KR 19980062148 A KR19980062148 A KR 19980062148A KR 100574287 B1 KR100574287 B1 KR 100574287B1
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resin composition
nucleating agent
polypropylene resin
rigidity
ethylene propylene
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KR20000045582A (en
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전용
이영준
노기수
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삼성토탈 주식회사
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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
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—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
    • C08K3/34—Silicon-containing compounds
    • 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
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0083—Nucleating agents promoting the crystallisation of the polymer matrix
    • 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
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • 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
    • C08K5/00—Use of organic ingredients
    • C08K5/56—Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond
    • 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
    • C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers

Abstract

본 발명은 에틸렌 프로필렌 블록공중합체, 유기금속계열 핵제, 무기계열 핵제로 이루어진 것을 특징으로 하는 강성, 내열성 및 내충격성이 우수한 폴리프로필렌 수지 조성물에 관한 것이다.The present invention relates to a polypropylene resin composition excellent in rigidity, heat resistance and impact resistance, comprising an ethylene propylene block copolymer, an organometallic nucleus agent, and an inorganic nucleus agent.

Description

강성 및 내충격성이 우수한 폴리프로필렌 수지 조성물Polypropylene resin composition excellent in rigidity and impact resistance

본 발명은 강성 및 내충격성이 우수한 수지 조성물에 관한 것으로서, 보다 구체적으로는 폴리프로필렌계 수지로서 에틸렌 프로필렌 블록공중합체, 유기금속계열 핵제, 무기계열 핵제로 이루어진 강성, 내열성 및 내충격성이 우수한 폴리프로필렌 수지 조성물에 관한 것이다.The present invention relates to a resin composition having excellent rigidity and impact resistance. More specifically, the present invention relates to a polypropylene resin having a high stiffness, heat resistance, and impact resistance made of an ethylene propylene block copolymer, an organometallic nucleating agent, and an inorganic nucleating agent. It relates to a resin composition.

일반적으로 프로필렌이 단독 중합된 폴리프로필렌은 강성, 경도, 인장강도 및 내열성은 뛰어나지만 자동차 부품 및 일반 포장용 사출품의 재질로 사용될 때 낮은 충격강도, 특히 저온에서의 낮은 충격강도 때문에 사용에 많은 제한이 있어 왔다. 이러한 낮은 내충격성을 개질하기 위하여 폴리프로필렌을 중합시킬 때 에틸렌을 부가적으로 첨가하여 공중합시킨 에틸렌 프로필렌 블록공중합체가 개발되었다. 이러한 에틸렌 프로필렌 블록공중합체는 충격개질에는 효과가 있으나 공중합체의 특성상 기존 폴리프로필렌에 비해 강성 및 내열성이 저하되는 문제가 발생하게 된다. 특히 ABS 수지 또는 고충격성 폴리스타일렌 등을 폴리프로필렌으로 대체하고 용도확대를 위해서는 내충격성과 강성을 동시에 향상시킬 수 있는 방법이 필요하다.Generally, propylene homopolymerized polypropylene has excellent rigidity, hardness, tensile strength and heat resistance, but when used as a material for injection parts for automobile parts and general packaging, there are many limitations in use due to low impact strength, especially low impact strength at low temperatures. It has been. In order to modify this low impact resistance, an ethylene propylene block copolymer has been developed in which an additional ethylene is copolymerized when the polypropylene is polymerized. Although the ethylene propylene block copolymer has an effect on impact modification, there is a problem that stiffness and heat resistance are lowered compared to the existing polypropylene due to the characteristics of the copolymer. In particular, in order to replace ABS resin or high impact polystyrene with polypropylene, and to expand its use, a method for simultaneously improving impact resistance and rigidity is needed.

폴리프로필렌의 충격특성을 향상시키기 위하여 에틸렌 프로필렌 공중합체(EPM) 혹은 에틸렌 프로필렌 다이엔 공중합체(EPDM)와 같은 고무성분의 물질을 폴리프로필렌에 용융혼합시키는 방법이 폭넓게 이용되어져 왔다. 그러나 이 방법은 EPM 혹은 EPDM의 분산이 문제가 될 수 있고, 가격이 상승하는 문제가 발생한다.In order to improve the impact properties of polypropylene, a method of melt-mixing rubber-based materials such as ethylene propylene copolymer (EPM) or ethylene propylene diene copolymer (EPDM) into polypropylene has been widely used. However, in this method, the dispersion of EPM or EPDM can be a problem, and the price rises.

다른 방법으로는 앞에서 언급한 프로필렌 중합시 α-올레핀, 예를 들어 에틸렌을 블록공중합시키는 방법이 있는데, 이 경우 에틸렌 함량이 높아짐에 따라 충격특성은 향상되지만 강성 및 내열성이 저하되는 문제가 있다.Another method is to block-polymerize α-olefins, for example, ethylene, in the aforementioned propylene polymerization. In this case, as the ethylene content is increased, the impact characteristics are improved, but the rigidity and heat resistance are deteriorated.

한편 충격특성을 저하시키지 않고, 강성을 올리는 방법으로는 첨가제로서 특수한 핵제를 사용하는 방법이 있다. 핵제 처방기술로는 유기조핵제를 첨가하는 방법과 무기 충전제를 사용하는 방법 등이 있는데 가격상승 및 다른 물성저하의 단점들이 존재한다. 그래서 고강성의 폴리프로필렌을 제조하기 위해서는 중합시 아이소택티시티(isotacticity)를 증대시키는 기술이 일본공개 특허공보 소55-81125호에 제시되어 있다.On the other hand, there is a method of using a special nucleating agent as an additive as a method of increasing rigidity without lowering the impact characteristic. Nucleating agent prescription techniques include adding organic nucleating agents and using inorganic fillers. There are disadvantages of price increases and other physical property deterioration. Thus, in order to produce high stiffness polypropylene, a technique for increasing isotacticity during polymerization is disclosed in Japanese Patent Laid-Open No. 55-81125.

본 발명의 목적은 상기와 같은 문제를 개선하여 강성, 내열성 및 내충격성이 모두 우수한 폴리프로필렌 수지 조성물을 제공하는 것이다.An object of the present invention is to improve the above problems to provide a polypropylene resin composition excellent in both rigidity, heat resistance and impact resistance.

본 발명의 수지 조성물은 에틸렌 프로필렌 블록공중합체, 유기금속계열 핵제, 무기계열 핵제로 이루어진 것을 특징으로 한다.The resin composition of the present invention is characterized by consisting of an ethylene propylene block copolymer, an organometallic nucleus agent, and an inorganic nucleus agent.

본 발명에서 에틸렌 프로필렌 블록공중합체로는 아이소택티시티 및 분자량 분포를 조정하여 강성 및 성형성을 향상시키고, 또한 내충격성을 향상시킬 목적으로 고유점도(IV : Intrinsic viscosity)를 높인 에틸렌 프로필렌 블록공중합체가 사용된다.In the present invention, the ethylene propylene block copolymer is an ethylene propylene block copolymer having high intrinsic viscosity (IV) for the purpose of improving the stiffness and moldability by adjusting isotacticity and molecular weight distribution, and also improving impact resistance. Is used.

보다 구체적으로는 본 발명에 사용되는 에틸렌 프로필렌 블록공중합체는 공중합 단량체인 에틸렌이 5～15몰% 포함되어 있고, 분자량 분포는 7～12, 아이소택틱 펜타드분율이 95～97%, 용제 추출분 고무(PER)의 고유점도(IV)가 4～7dl/g 이고, 그리고 용융지수(MI)가 6～15g/10분(ASTM D1238, 230℃)인 것이 바람직하다.More specifically, the ethylene propylene block copolymer used in the present invention contains 5 to 15 mol% of ethylene which is a copolymerization monomer, has a molecular weight distribution of 7 to 12, an isotactic pentad fraction of 95 to 97%, and solvent extraction. It is preferable that the intrinsic viscosity (IV) of the powdered rubber (PER) is 4 to 7 dl / g, and the melt index (MI) is 6 to 15 g / 10 minutes (ASTM D1238, 230 ° C).

에틸렌 함량이 5몰% 미만이면 충격강도가 저하되고, 에틸렌 함량이 15몰%를 초과하면 표면경도와 광택이 저하된다.If the ethylene content is less than 5 mol%, the impact strength is lowered. If the ethylene content is more than 15 mol%, the surface hardness and gloss are reduced.

분자량 분포가 7 미만이면 흐름성이 나빠져서 그릴 등의 복잡형상을 지니는 제품의 성형시 미성형의 불량을 일으킬 우려가 있으며, 분자량 분포가 12를 초과하면 사출성형시 계량시간이 지나치게 길어져서 전체 생산속도를 낮추게 된다.If the molecular weight distribution is less than 7, there is a risk of poor molding during molding of a product having a complicated shape such as grille due to poor flowability.If the molecular weight distribution is over 12, the measuring time becomes too long during injection molding, resulting in overall production speed. Will be lowered.

아이소택틱 펜타드분율이 95% 미만이면 폴리프로필렌 수지가 지니는 내열성 및 강성이 낮아지는 단점이 있다.If the isotactic pentad fraction is less than 95%, the heat resistance and rigidity of the polypropylene resin are lowered.

용제추출분 고무(PER)의 고유점도(IV)가 4 dl/g 미만이면 탄성이 약해지고, 7 dl/g을 초과하는 경우에는 고무의 분산이 나빠져 외관 및 내충격성이 저하된다.If the intrinsic viscosity (IV) of the solvent extraction powder (PER) is less than 4 dl / g, the elasticity is weakened. If the intrinsic viscosity (IV) of the solvent extract powder (PER) is more than 7 dl / g, the dispersion of the rubber is worsened and the appearance and impact resistance are lowered.

용융지수가 6g/10분 미만인 경우에는 부품의 성형성이 양호하지 못하여 생산성이 저하되는 반면, 용융지수가 15g/10분을 초과하는 경우에는 고무의 분산이 나빠져 충격강도가 저하될 뿐만 아니라 겔(GEL)이 발생한다.If the melt index is less than 6g / 10 minutes, the moldability of the part is not good, the productivity is reduced, while if the melt index is more than 15g / 10 minutes, the dispersion of the rubber is worsened, not only the impact strength is lowered, but also the gel ( GEL) occurs.

상기한 바와 같은 에틸렌 프로필렌 블록공중합체는 예를 들어, 대한민국 특허출원번호 제 97-17650호에 기재되어 있는 특별히 고안된 촉매계를 이용한 공중합방법에 의하여 제조될 수 있다. 상기 특허출원에는 마그네슘과 할로겐 함유 티타늄 화합물 및 내부 전자공여체를 필수 성분으로 하는 고체착물 티타늄 촉매와 주기율표 제 Ⅰ족 및 제 Ⅲ족 금속의 유기금속 화합물 및 외부전자공여체로서 동일 중합조건에서 각각의 유기 규소 화합물을 사용하여 중합한 호모 폴리머의 용융지수가 각각 5 이하, 5～20, 20 이상인 유기 규소화합물 3종 이상을 혼합하여 중합하는 것을 특징으로 하는 α-올레핀의 중합 또는 공중합 방법이 개시되어 있으며, 이 방법에 의하면 고수율로 고입체 규칙성인 올레핀 (공)중합체를 제조할 수 있다. 이와 같은 에틸렌 프로필렌 블록공중합체의 제조는 제 1단계에서 고결정성 폴리프로필렌 단독 중합체가 70～95% 중합되고, 이어서 제 2단계에서 에틸렌 프로필렌 공중합체가 생성된다.The ethylene propylene block copolymer as described above may be prepared by, for example, a copolymerization method using a specially designed catalyst system described in Korean Patent Application No. 97-17650. The patent application includes a solid complex titanium catalyst containing magnesium and a halogen-containing titanium compound and an internal electron donor as an essential component, an organometallic compound of the Group I and Group III metals of the periodic table, and an external electron donor. A polymerization or copolymerization method of α-olefin is disclosed, characterized by mixing and polymerizing three or more kinds of organosilicon compounds each having a melt index of 5 or less, 5 to 20, or 20 or more, which is polymerized using a compound. According to this method, an olefin (co) polymer having high stereoregularity can be produced in high yield. In the preparation of such an ethylene propylene block copolymer, 70 to 95% of the highly crystalline polypropylene homopolymer is polymerized in the first step, and then an ethylene propylene copolymer is produced in the second step.

본 발명에 사용되는 유기금속계열 핵제는 특별한 제한을 두지 아니하여 알루미늄염, 칼슘염, 나트륨염에서 선택되는 금속염이 사용될 수 있으며, 구체적인 예로는 알루미늄 파라 터셔리 부틸 벤조산, 칼슘 벤조산, 나트륨 벤조산 등을 들 수 있다. 유기금속계열 핵제는 에틸렌 프로필렌 블록공중합체 100중량부에 대하여 0.05～0.3중량부가 첨가되는 것이 바람직하며, 0.05중량부 미만인 경우에는 충분한 내열성을 얻기 어렵고, 0.3중량부를 초과하는 경우에는 더 이상의 물성향상 효과가 발현되지 않는다.The organometallic nucleating agent used in the present invention may be a metal salt selected from aluminum salts, calcium salts and sodium salts without particular limitation, and specific examples include aluminum parabutyl benzoic acid, calcium benzoic acid, sodium benzoic acid, and the like. Can be mentioned. The organometallic nucleating agent is preferably added in an amount of 0.05 to 0.3 parts by weight with respect to 100 parts by weight of ethylene propylene block copolymer, and when it is less than 0.05 parts by weight, it is difficult to obtain sufficient heat resistance. Is not expressed.

본 발명에 사용되는 무기계열 핵제는 평균입경이 2.0μ이고, 최대입경이 6.0μ 이하인 무기물로서, 특히 탈크 핵제가 바람직하며, 최대입경이 6.0μ를 초과하는 경우에는 핵제효과 효율이 낮아진다. 무기계열 핵제는 에틸렌 프로필렌 블록공중합체 100중량부에 대하여 0.1～0.5중량부 첨가하는 것이 바람직하며, 0.1중량부 미만인 경우에는 충분한 내열성을 얻기 어렵고, 0.5중량부를 초과하는 경우에는 효과가 더이상 개선되지 않는다.The inorganic nuclear agent used in the present invention is an inorganic material having an average particle diameter of 2.0 mu m and a maximum particle diameter of 6.0 mu m or less, particularly preferably a talc nucleating agent, and when the maximum particle diameter exceeds 6.0 mu m, the nucleating agent effect efficiency is low. It is preferable to add 0.1-0.5 weight part of inorganic type nucleating agents with respect to 100 weight part of ethylene propylene block copolymers, and when it is less than 0.1 weight part, sufficient heat resistance is difficult to obtain, and when it exceeds 0.5 weight part, the effect does not improve further. .

본 발명의 수지 조성물에는 보강제, 충전제, 내열안정제, 내후안정제, 대전방지제, 활제, 슬립제, 핵제, 난연제, 안료, 염료 등과 같은 각종 첨가제가 본 발명의 특징에 어긋나지 않는 범위내에서 첨가될 수 있다.To the resin composition of the present invention, various additives such as reinforcing agents, fillers, heat stabilizers, weather stabilizers, antistatic agents, lubricants, slip agents, nucleating agents, flame retardants, pigments, dyes, and the like may be added within a range not departing from the characteristics of the present invention. .

본 발명의 수지 조성물을 제조하는 방법에 있어서는 특별한 제한이 없고, 보편적으로 알려진 폴리프로필렌 수지 조성물을 제조하는 방법을 이용할 수 있으며, 상기의 각 성분들을 원하는 순서에 따라 자유롭게 선택하여 혼합할 수 있다. 통상 상기 각 성분들과 기타 첨가제를 필요한 양으로 첨가하여 니더, 롤, 반바리 믹서 등의 혼련기와 1축 또는 2축 압출기 등을 사용하여 혼련하는 방법이 이용될 수 있다.There is no particular limitation on the method for producing the resin composition of the present invention, and a method for producing a polypropylene resin composition which is commonly known can be used, and each of the above components can be freely selected and mixed in a desired order. In general, a method of kneading using a kneader such as a kneader, a roll, a short-barrier mixer, and a single or twin screw extruder may be used by adding each of the above components and other additives in a required amount.

본 발명은 하기의 실시예 및 비교예에 의하여 보다 구체적으로 이해될 수 있으며, 하기의 실시예는 본 발명을 예시하기 위한 예에 지나지 않는 것으로 본 발명의 보호범위를 제한하고자 하는 것은 아니다.The present invention can be understood in more detail by the following examples and comparative examples, the following examples are only examples for illustrating the present invention and are not intended to limit the protection scope of the present invention.

실시예 및 비교예Examples and Comparative Examples

각 실시예 및 비교예에 있어서의 제반물성의 측정방법은 다음과 같다.The measuring method of the physical properties in each Example and a comparative example is as follows.

사출성형의 물성측정법Measurement of physical properties of injection molding

굴곡탄성률 : ASTM D790Flexural Modulus: ASTM D790

인장강도 : ASTM D638Tensile Strength: ASTM D638

저온 충격강도 : ASTM D256Low Temperature Impact Strength: ASTM D256

열변형 온도 : ASTM D648Heat Deflection Temperature: ASTM D648

에틸렌 프로필렌 블록공중합체Ethylene Propylene Block Copolymer

에틸렌 함량 : 적외선 흡수 스펙트럼법Ethylene Content: Infrared Absorption Spectroscopy

분자량 분포 : 겔투과 크로마토그래피(GPC)법, 중량평균분자량/수평균분자량Molecular weight distribution: gel permeation chromatography (GPC) method, weight average molecular weight / number average molecular weight

값              value

아이소택틱 펜타드 분율 : 13C-NMR을 이용한 폴리프로필렌 분자쇄중의 펜타Isotactic pentad fraction: Penta in polypropylene molecular chain using 13 C-NMR

드 단위로서의 아이소택틱 분율              Isotactic fraction as de unit

용제추출분 고무(PER) 함량 : 용제추출분 고무중 무정형 부분으로 n-데칸Solvent Extract Rubber (PER) Content: n-decane as an amorphous part of solvent extract rubber

추출법을 이용              Using extraction

용융지수(MI) : ASTM D1238, 230℃, 2.16kg.Melt Index (MI): ASTM D1238, 230 ° C, 2.16kg.

실시예 1, 2 및 비교예 1Examples 1 and 2 and Comparative Example 1 ～～ 33

표 1에 나타낸 조성물의 물성을 측정하기 위하여 사출기를 이용하여 ASTM Family 1호 시편을 만들었다. 이때 사용된 사출기는 삼성 클뢰크너 FM 140TON이며, 사출조건은 호퍼로부터의 온도분포를 30℃, 200℃, 220℃, 230℃, 230℃(노즐의 온도), 160℃(금형온도)로 고정하고, 사출압력은 50～120바의 범위에서 실시하였다. 사출된 시편을 상온 23℃의 실내에 72시간 방치후 물성을 측정하였다. 각 물성치는 표 1에 나타내었다.In order to measure the physical properties of the compositions shown in Table 1, ASTM Family 1 specimens were made using an injection machine. The injection machine used was Samsung Klockner FM 140TON, and the injection conditions were fixed at 30 ℃, 200 ℃, 220 ℃, 230 ℃, 230 ℃ (nozzle temperature), 160 ℃ (mold temperature). The injection pressure was carried out in the range of 50 to 120 bar. The extruded specimens were placed in a room temperature of 23 ° C. for 72 hours and then physical properties were measured. Each physical property value is shown in Table 1.

상기 표1의 결과에서 알 수 있듯이, 실시예 1과 비교예 1은 모두 에틸렌 프로필렌 블록공중합체를 사용하여 강성이 우수하지만, 비교예 1의 경우 사용된 에틸렌 프로필렌 블록공중합체의 용제추출분 고유점도가 지나치게 높아 저온충격강도가 실시예 1에 비하여 열세하다.As can be seen from the results of Table 1, Example 1 and Comparative Example 1 are both excellent in rigidity using an ethylene propylene block copolymer, but in the case of Comparative Example 1 solvent intrinsic viscosity of the ethylene propylene block copolymer used Is too high, the low-temperature impact strength is inferior to Example 1.

또한 아이소택틱 펜타드분율이 높은 에틸렌 프로필렌 블록공중합체를 사용한 실시예 1의 경우 일반 공중합체를 사용한 비교예 2에 비하여 강성과 내충격성이 우수하다.In addition, Example 1 using the ethylene propylene block copolymer having a high isotactic pentad fraction is superior in stiffness and impact resistance as compared to Comparative Example 2 using a general copolymer.

그리고 실시예 2와 비교예 3 모두 에틸렌 프로필렌 블록공중합체에 핵제를 첨가하였지만, 본 발명에서 한정한 물성을 갖는 에틸렌 프로필렌 블록공중합체를 사용한 실시예 2가 강성, 내충격성 및 내열성 등 모든 면에서 우수하다.In addition, in Example 2 and Comparative Example 3, the nucleating agent was added to the ethylene propylene block copolymer, but Example 2 using the ethylene propylene block copolymer having physical properties defined in the present invention is excellent in all aspects such as rigidity, impact resistance and heat resistance. Do.

이상에서 알 수 있는 바와 같이 본 발명에 따른 폴리프로필렌 수지 조성물은 강성, 내열성 및 내충격성이 모두 우수한 장점을 갖는다.As can be seen from the above, the polypropylene resin composition according to the present invention has all the advantages of rigidity, heat resistance and impact resistance.

Claims (3)

공중합 단량체인 에틸렌이 5~15몰% 포함되어 있고, 분자량 분포는 7~12, 아이소택틱 펜타드 분율이 95~97%, 용제 추출분 고무(PER)의 고유점도가 4~7dl/g, 용융지수가 6~15g/10분인 에틸렌 프로필렌 블록공중합체 100중량부에 대하여 유기금속계열 핵제 0.05~0.3중량부, 무기계열 핵제 0.1~0.5중량부로 이루어진 것을 특징으로 하는 폴리프로필렌 수지 조성물.5-15 mol% of ethylene which is a copolymerization monomer is contained, the molecular weight distribution is 7-12, the isotactic pentad fraction is 95-97%, the intrinsic viscosity of a solvent extract powder (PER) is 4-7 dl / g, A polypropylene resin composition comprising 0.05 to 0.3 parts by weight of an organometallic nucleating agent and 0.1 to 0.5 parts by weight of an inorganic nucleating agent with respect to 100 parts by weight of an ethylene propylene block copolymer having a melt index of 6 to 15 g / 10 minutes. 제 1항에 있어서, 상기 유기금속계열 핵제는 알루미늄염, 칼슘염, 나트륨염에서 선택되는 금속염인 것을 특징으로 하는 폴리프로필렌 수지 조성물.The polypropylene resin composition according to claim 1, wherein the organometallic nucleating agent is a metal salt selected from aluminum salts, calcium salts and sodium salts. 제 1항에 있어서, 상기 무기계열 핵제는 평균입경이 2.0μ이고, 최대입경이 6.0μ이하인 탈크 핵제인 것을 특징으로 하는 폴리프로필렌 수지 조성물.The polypropylene resin composition according to claim 1, wherein the inorganic nucleating agent is a talc nucleating agent having an average particle diameter of 2.0 mu m and a maximum particle diameter of 6.0 mu m or less.
KR1019980062148A 1998-12-30 1998-12-30 Polypropylene resin composition excellent in rigidity and impact resistance KR100574287B1 (en)

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