KR940004854B1 - Thermoplastic resin composition - Google Patents

Thermoplastic resin composition Download PDF

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KR940004854B1
KR940004854B1 KR1019900019066A KR900019066A KR940004854B1 KR 940004854 B1 KR940004854 B1 KR 940004854B1 KR 1019900019066 A KR1019900019066 A KR 1019900019066A KR 900019066 A KR900019066 A KR 900019066A KR 940004854 B1 KR940004854 B1 KR 940004854B1
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South Korea
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parts
weight
resin composition
acrylonitrile
abs
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KR1019900019066A
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Korean (ko)
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KR920009916A (en
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이인태
박태성
박종원
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제일모직 주식회사
이대원
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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
    • C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
    • C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
    • 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
    • C08L23/06—Polyethene
    • 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
    • C08L25/08—Copolymers of styrene
    • C08L25/12—Copolymers of styrene with unsaturated nitriles

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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)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The plastic resin compsn. having good chemical resistance and vaccum formability and improved flowing property comprises 20-40 wt.pts. of g-ABS contg. 20-50 wt.% of butadiene; 60-80 wt.pts. of styrene acrylonitrile (SAN) contg. 20-30 wt.% of acrylonitrile; and 1-5 wt.pts. of polyethylene having 20000-40000 ave. molecular wt.. The obtd. ABS resin compsn. is useful as the frost resistant material for the refrigerating chamber.

Description

열가소성 수지조성물Thermoplastic Composition

본 발명은 내약품성과 진공성형성이 우수한 열가소성 수지조성물에 관한 것이다. 더욱 상세하게로는 불소화 탄화수소에 강하고 유동성이 향상됨으로써 진공성형시 성형 부위별 두께편차를 감소시켜서 외부 응력에 의한 성형품의 균열을 방지할 수 있는 열가소성 수지조성물에 관한 것으로, 특히 냉장고용 내상재로 사용될 수 있는 ABS 수지조성물에 관한 것이다.The present invention relates to a thermoplastic resin composition excellent in chemical resistance and vacuum forming. More particularly, the present invention relates to a thermoplastic resin composition which is resistant to fluorinated hydrocarbons and improves fluidity, thereby reducing the thickness deviation of each molded part during vacuum molding to prevent cracking of the molded product due to external stress. It relates to an ABS resin composition that can be.

냉장고용 내상재로는 HIPS, PV, ABS 들이 주로 사용되고 있으며, 단열재로는 폴리우레탄 포옴을 사용하고 있다. 이 폴리우레탄을 발포시킬 때 불소화탄화수소 (CCI3F)가 사용되는데 이것이 폴리우레탄 포옴에 잔류하여 있음으로써 냉장고 내상재와 접촉하여 냉온사용시 내상재의 응력집중 부위에 균열을 발생시키는 요인이 되고 있다.HIPS, PV, and ABS are mainly used as inner materials for refrigerators, and polyurethane foams are used as insulation materials. When foaming the polyurethane, fluorinated hydrocarbon (CCI 3 F) is used, which remains in the polyurethane foam, which is in contact with the refrigerator inner material and causes cracking in stress concentration areas of the inner material during cold and hot use.

본 발명의 상기 목적은 이와 같은 문제점을 해결하기 위한 것으로,진공성형성 및 내약품성이 우수한 냉장고 내상재용 ABS 수지조성물을 제공하기 위한 것이다.The object of the present invention is to solve such a problem, to provide an ABS resin composition for a refrigerator inner material having excellent vacuum forming properties and chemical resistance.

본 발명자는 상기 목적을 달성하기 위하여 예의 연구한 결과, ABS 수지중에서 화학적 안정성이 약한 부타디엔의 함량을 20-50중량%로 조절하고, 스티렌 아크릴로니트릴(SAN) 중의 아크릴로니트릴 함량을 20-30중량%로 조절한 후, 상기 수지들을 2:8-4:6중량비로 혼합하고, 여기에 소수성이며 화학적으로 안정된 저분자량의 PE(Polyethylene)를 적당량 첨가하게 되면 수지의 진공성형성과 내약품성이 향상된다는 것을 밝혀내게 되었다.As a result of earnestly researching to achieve the above object, the present inventors have adjusted the content of weak chemical stability butadiene to 20-50% by weight in the ABS resin, and the content of acrylonitrile in styrene acrylonitrile (SAN) 20-30 After adjusting to% by weight, the resin is mixed in a 2: 8-4: 6 weight ratio, and an appropriate amount of hydrophobic and chemically stable low molecular weight PE (Polyethylene) is added thereto to improve vacuum formation and chemical resistance of the resin. Turned out to be.

이때 사용되는 저분자량의 PE는 분자량이 20,000∼40,000의 것이며, 이 범위미만의 경우에는 가공시 열에 의해 분해될 수 있고, 이 범위 이상인 경우에는 박리현상이 발생하고 혼용성이 부족하게 되는 문제점이 있다. 그 적절한 사용량은 수지 100중량부에 대하여 1-5중량부가 적당하다. 1중량부 미만 첨가시에는 내약품성과 유동성을 향상시킬 수 없으며, 5중량부 이상 사용시에는 표면 박리형상이 발생하기 때문이다.In this case, the low molecular weight PE used has a molecular weight of 20,000 to 40,000, and if it is less than this range, it can be decomposed by heat during processing. . The suitable amount of use is suitably 1-5 parts by weight based on 100 parts by weight of the resin. If less than 1 part by weight, the chemical resistance and fluidity can not be improved, when using more than 5 parts by weight surface peeling occurs.

본 발명에 사용될 수 있는 ABS 수지의 예로는 아크릴로니트릴 부타디엔 이소프렌 공중합체, 아크릴로니트릴 부타디엔 α-메틸스티렌 공중합체, 아크릴로니트릴 부타디엔스티렌 α-메틸스티렌 공중합체 등이다.Examples of ABS resins that can be used in the present invention are acrylonitrile butadiene isoprene copolymers, acrylonitrile butadiene α-methylstyrene copolymers, acrylonitrile butadienestyrene α-methylstyrene copolymers, and the like.

상기 수지조성물에는 필요에 따라 활제, 산화방지제, 열안정제, 가공조제, 이형제, 염료 등의 첨가제를 적당량 첨가시킬 수 있다.If necessary, additives such as lubricants, antioxidants, heat stabilizers, processing aids, mold release agents, and dyes may be added to the resin composition.

본 발명의 실시예는 다음과 같다.Embodiments of the present invention are as follows.

하기 실시예와 비교예의 부는 중량부를 의미하며, 물성평가는 다음의 방법으로 하였다.The part of the following Example and a comparative example means a weight part, and the physical property evaluation was carried out by the following method.

* 충격강도(1/8", 20℃, 노치부 아이조드) : ASTM D-256* Impact Strength (1/8 ", 20 ℃, Notched Izod): ASTM D-256

* 멜트 인덱스(220℃, 10㎏) : ASTM D-1238* Melt Index (220 ℃, 10㎏): ASTM D-1238

* 인장강도(5㎜/min) : ASTM D-638* Tensile Strength (5㎜ / min): ASTM D-638

[제조실시예 1]Preparation Example 1

* 그라프트 공중합체의 제조* Preparation of Graft Copolymer

반응기에 폴리부타디엔 라텍스 50부, 스티렌 35부, 아크릴로니트릴 15부와 t-도데실메르캅탄 0.2부와 황산칼륨 0.5부, 올레산 나트륨 0.5를 놓고 통상의 중합법에 의하여 제조한 후, 후처리 공정을 거쳐 건조 분말 그라프트 공중합체 g-ABS를 얻는다.50 parts of polybutadiene latex, 35 parts of styrene, 15 parts of acrylonitrile, 0.2 parts of t-dodecyl mercaptan, 0.5 parts of potassium sulfate, and 0.5 parts of sodium oleate were prepared by a conventional polymerization method, followed by a post-treatment step. The dry powder graft copolymer g-ABS is obtained through.

[제조실시예 2]Production Example 2

* 방향족 비닐 공중합체의 제조* Preparation of Aromatic Vinyl Copolymer

반응기에 스티렌 75부, 아크릴로니트릴 25부와 t-도데실메르캅탄 0.6부를 넣고 통상의 중합방법에 의하여 공중합체를 얻었으며, 이 공중합체를 SAN-1이라 칭한다. 또 스티렌 70부, 아크릴로니트릴 30부, t-도데실메르캅탄 0.5부를 넣고 통상의 현탁 중합방법에 의하여 얻어진 공중합체를 SAN-2라 칭한다.75 parts of styrene, 25 parts of acrylonitrile and 0.6 parts of t-dodecyl mercaptan were added to the reactor to obtain a copolymer by a conventional polymerization method. This copolymer is called SAN-1. In addition, 70 parts of styrene, 30 parts of acrylonitrile, and 0.5 part of t-dodecyl mercaptan are added, and the copolymer obtained by the usual suspension polymerization method is called SAN-2.

[실시예 1-6]Example 1-6

제조실시예 1의 g-ABS 30부, 제조실시예 2의 SAN-1 35부, SAN-3 35부에 저분자량 폴리에틸렌(일본 스미토모세이카사의 UF-80을 사용, 평균분자량 30,000) 1,2,3,4,5,6부를 각각 헨셀믹서에서 3분간 1000rpm으로 혼합한 후 틔원 익스트루더(twin extruder)로 펠렛화하여 물성을 분석한다.30 parts of g-ABS of Production Example 1, 35 parts of SAN-1 of Production Example 2, 35 parts of SAN-3 (low molecular weight polyethylene (using UF-80 from Sumitomo Seika, Japan, average molecular weight 30,000) 1,2, 3,4,5,6 parts were mixed at 1000 rpm in a Henschel mixer for 3 minutes, and then pelletized by a twin extruder to analyze physical properties.

[비교예 1]Comparative Example 1

제조실시예 1의 g-ABS 30부, 제조실시예 2의 SAN-1 35부, SAN-2 35부를 헨셀믹서 혼합후, 나머지는 실시예와 동일하게 하여 물성을 테스트하였다.30 parts of g-ABS of Preparation Example 1, 35 parts of SAN-1 and 35 parts of SAN-2 of Preparation Example 2 were mixed with a Henschel mixer, and the remainder was tested in the same manner as in Example.

[비교예 2]Comparative Example 2

비교예 1에서 PE를 0.5부 첨가하여 나머지는 실시예와 동일하게 하여 물성을 테스트하였다.In Comparative Example 1, 0.5 parts of PE was added, and the remainder was tested in the same manner as in Example.

상기 실시예 및 비교예의 물성 시험결과는 다음과 같다.Physical property test results of the Examples and Comparative Examples are as follows.

* 실시예 6에서는 사출시편을 절단할 때 박리현상이 생김.* In Example 6, peeling phenomenon occurs when cutting the injection specimen.

* 진공성형성은 멜트인덱스(MI)에 의하여 판단함.* Vacuum forming is judged by melt index (MI).

이상의 실시예 및 비교예를 통하여 알 수 있는 바와같이 본 발명에 의한 수지조성물은 유동성과 내약품성이 뛰어나므로 냉장고용 내장재로 유용하게 사용될 수 있다.As can be seen from the above examples and comparative examples, the resin composition according to the present invention has excellent fluidity and chemical resistance, and thus may be usefully used as a refrigerator interior material.

Claims (1)

부타디엔의 함량이 20-50중량%인 g-ABS 20-40중량부, 아크릴로니트릴 함량이 20-30중량%인 스티렌 아크릴로니트릴 (SAN)60-80중량부, 분자량 20,000-40,000의 폴리에틸렌 1-5중량부로 구성됨으로써 내약품성과 유동성이 향상된 것을 특징으로 하는 열가소성 수지조성물.20-40 parts by weight of g-ABS having a butadiene content of 20-50% by weight, 60-80 parts by weight of styrene acrylonitrile (SAN) having a content of 20-30% by weight of acrylonitrile, a polyethylene having a molecular weight of 20,000-40,000 1 The thermoplastic resin composition, characterized by improved chemical resistance and fluidity by being composed of -5 parts by weight.
KR1019900019066A 1990-11-23 1990-11-23 Thermoplastic resin composition KR940004854B1 (en)

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