KR20010037907A - Method for preparing syndiotactic polystyrene having superior impact-resistance - Google Patents

Method for preparing syndiotactic polystyrene having superior impact-resistance Download PDF

Info

Publication number
KR20010037907A
KR20010037907A KR1019990045651A KR19990045651A KR20010037907A KR 20010037907 A KR20010037907 A KR 20010037907A KR 1019990045651 A KR1019990045651 A KR 1019990045651A KR 19990045651 A KR19990045651 A KR 19990045651A KR 20010037907 A KR20010037907 A KR 20010037907A
Authority
KR
South Korea
Prior art keywords
syndiotactic polystyrene
polystyrene
alkyl
impact resistance
alkyl lithium
Prior art date
Application number
KR1019990045651A
Other languages
Korean (ko)
Other versions
KR100417252B1 (en
Inventor
김성은
류진영
최문희
정유미
Original Assignee
성재갑
주식회사 엘지화학
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 성재갑, 주식회사 엘지화학 filed Critical 성재갑
Priority to KR10-1999-0045651A priority Critical patent/KR100417252B1/en
Publication of KR20010037907A publication Critical patent/KR20010037907A/en
Application granted granted Critical
Publication of KR100417252B1 publication Critical patent/KR100417252B1/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F257/00Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group C08F12/00
    • C08F257/02Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group C08F12/00 on to polymers of styrene or alkyl-substituted styrenes
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F212/00Copolymers 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
    • C08F212/02Monomers containing only one unsaturated aliphatic radical
    • C08F212/04Monomers containing only one unsaturated aliphatic radical containing one ring
    • C08F212/06Hydrocarbons
    • C08F212/08Styrene
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F236/00Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
    • C08F236/02Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
    • C08F236/04Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
    • C08F236/10Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with vinyl-aromatic monomers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Graft Or Block Polymers (AREA)

Abstract

PURPOSE: Provided is a process for producing syndiotactic polystyrene having excellent impact-resistance and heat-resistance by grafting a butadiene monomer on the syndiotactic polystyrene. CONSTITUTION: The process comprises the steps of: lithiating the syndiotactic polystyrene containing 0.2-15mol% of an alkyl styrene by dispersing the syndiotactic polystyrene in cyclohexane solution and then adding 0.02-4.0mmol (based on the syndiotactic polystyrene of 1g) of an alkyl lithium and tetramethylethylenediamine which is 0.4-2.5 times as much as the alkyl lithium; grafting the butadiene monomer on the lithiated syndiotactic polystyrene. The alkyl lithium is n-butyl lithium or s-butyl lithium.

Description

내충격성이 우수한 신디오탁틱 폴리스티렌의 제조방법{METHOD FOR PREPARING SYNDIOTACTIC POLYSTYRENE HAVING SUPERIOR IMPACT-RESISTANCE}Manufacturing method of syndiotactic polystyrene excellent in impact resistance {METHOD FOR PREPARING SYNDIOTACTIC POLYSTYRENE HAVING SUPERIOR IMPACT-RESISTANCE}

[산업상 이용분야][Industrial use]

본 발명은 내충격성이 우수한 신디오탁틱 폴리스티렌의 제조방법에 관한 것으로, 특히 신디오탁틱 폴리스티렌을 부타디엔으로 그라프트 반응시켜 내충격성을 높이는 방법에 관한 것이다.The present invention relates to a method for producing syndiotactic polystyrene excellent in impact resistance, and more particularly, to a method of increasing impact resistance by graft reaction of syndiotactic polystyrene with butadiene.

[종래기술][Private Technology]

폴리스티렌은 무색 투명한 열가소성 수지로 스티렌 단량체를 괴상중합, 현탁중합 등의 방법을 이용하여 합성하며, 유전율이 낮아 전기적 특성이 우수하고, 열유동성 및 착색성이 뛰어난 대표적 열가소성 수지로서 압출성형, 사출성형의 방법을 통해 각종 일상용품에 이용되고 있다.Polystyrene is a colorless transparent thermoplastic resin. Synthesis of styrene monomer using bulk polymerization, suspension polymerization, etc. is a representative thermoplastic resin with excellent electrical properties with low dielectric constant and excellent thermal fluidity and colorability. Through the use of various daily necessities.

특히, 스티렌 단량체를 메탈로센 촉매를 사용하여 중합하면 고입체 규칙성을 갖는 신디오탁틱(syndiotactic) 폴리스티렌을 제조할 수 있다. 신디오탁틱 폴리스티렌의 제조에 관하여는 문헌(Macromolecules, 1986, 19, 2464. Macromolecules 1988, 21, 3356.)에 보고되고 있다.In particular, the polymerization of the styrene monomer using a metallocene catalyst can produce syndiotactic polystyrene having high stereoregularity. The preparation of syndiotactic polystyrene is reported in Macromolecules, 1986, 19, 2464. Macromolecules 1988, 21, 3356.

메탈로센으로 중합되는 신디오탁틱 폴리스티렌은 종래의 폴리스티렌이 갖는 낮은 유전율과 뛰어난 열유동성 등의 장점과 함께 높은 입체규칙성에 의한 뛰어난 내열성 및 내화학성을 나타내어 새로운 엔지니어링 플라스틱으로 대두되고 있다.Syndiotactic polystyrene polymerized with metallocene has emerged as a new engineering plastic by exhibiting excellent heat resistance and chemical resistance due to high stereoregularity, along with advantages such as low dielectric constant and excellent thermal fluidity of conventional polystyrene.

신디오탁틱 폴리스티렌은 이러한 장점을 갖고 있지만 낮은 내충격성 때문에 이용에 제한을 받는다.Syndiotactic polystyrene has this advantage but is limited in use due to its low impact resistance.

내충격성 개선을 위해서는 고무상 탄성체와 스티렌 중합체를 혼합하는 방법(일본 공개특허공보 소62-257950호, 평1-146944호, 평1-279944호 등)이 있다. 그러나 이 경우 분산성을 높이기 위해서는 충분히 반죽을 하여야 하고, 고무상 탄성체가 탄성을 가지고 있기 때문에 고무상 탄성체를 미세하게 절단할 필요가 있으나 그 탄성 때문에 취급하는 데 문제가 있다. 또한, 혼합 반죽시 고무의 교차결합 또는 수지의 분자량 저하 등이 발생하는 문제점이 있다.In order to improve the impact resistance, there is a method of mixing a rubbery elastomer with a styrene polymer (Japanese Patent Laid-Open No. 62-257950, Japanese Patent Application No. 1-146944, Japanese Patent Application Publication No. 1-279944, etc.). However, in this case, in order to increase the dispersibility, it is necessary to knead sufficiently, and since the rubbery elastic body has elasticity, it is necessary to cut the rubbery elastic body finely, but there is a problem in handling because of its elasticity. In addition, there is a problem in that cross-linking of the rubber or molecular weight decrease of the resin during mixing kneading.

이러한 문제점을 해소하고자 고무상 탄성체 존재하에서 스티렌 단량체를 메탈로센 중합하는 방법이 제시되었으나(한국 공고특허공보 제95-12726호) 고무상 탄성체와 스티렌 중합체간의 화학적 결합이 적어 내충격성을 크게 높이지는 못하였다.In order to solve this problem, a method of metallocene polymerization of a styrene monomer in the presence of a rubbery elastomer has been proposed (Korean Patent Publication No. 95-12726). However, the chemical bond between the rubbery elastomer and the styrene polymer is small, which greatly increases impact resistance. I couldn't.

위와 같은 문제점을 극복하기 위해서는 폴리스티렌에 고무상 탄성체를 그라프팅시키는 방법이 가장 효과적이다. 그러나 일반 폴리스티렌의 경우 방향족계 용제에 매우 잘 용해가 되기 때문에 용액 중합 등의 방법을 이용하여 쉽게 그라프팅 반응을 유도할 수 있지만, 신디오탁틱 폴리스티렌의 경우 범용용제에 거의 녹지 않기 때문에 균일계 반응이 불가능하여 그라프팅 반응시키는데 많은 제약이 따른다.In order to overcome the above problems, the method of grafting a rubbery elastomer to polystyrene is most effective. However, since general polystyrene is very well dissolved in aromatic solvents, the grafting reaction can be easily induced by using a solution polymerization method. However, syndiotactic polystyrene is hardly dissolved in a general purpose solvent, so that a homogeneous reaction is difficult. It is not possible and there are many constraints on the grafting reaction.

본 발명은 상기 종래기술의 문제점을 고려하여, 내충격성이 우수한 신디오탁틱 폴리스티렌의 제조방법을 제공하는 것을 목적으로 한다.In view of the problems of the prior art, an object of the present invention is to provide a method for producing syndiotactic polystyrene excellent in impact resistance.

또한 본 발명의 다른 목적은 탄성체를 그라프팅시키기 어려운 신디오탁틱 폴리스티렌을 용이하게 그라프팅시키는 방법을 제공하는 것이다.Another object of the present invention is to provide a method for easily grafting syndiotactic polystyrene, which is difficult to graf the elastic body.

[과제를 해결하기 위한 수단][Means for solving the problem]

본 발명은 상기 목적을 달성하기 위하여,The present invention to achieve the above object,

a) 신디오탁틱 폴리스티렌을 알킬 리튬으로 리튬화시키는 단계; 및a) lithiating syndiotactic polystyrene with alkyl lithium; And

b) 상기 a)단계에서 리튬화된 신디오탁틱 폴리스티렌에 부타디엔 단량체를b) Butadiene monomer to the lithiated syndiotactic polystyrene in step a)

그라프트시키는 단계Grafting Step

를 포함하는 내충격성이 우수한 신디오탁틱 폴리스티렌의 제조 방법을 제공한다.It provides a method for producing syndiotactic polystyrene excellent impact resistance comprising a.

상기 신디오탁틱 폴리스티렌은 알킬스티렌 0.2∼15 중량%를 함유한 공중합체가 바람직하다.The syndiotactic polystyrene is preferably a copolymer containing 0.2 to 15% by weight of alkyl styrene.

이하에서 본 발명을 더욱 상세하게 설명한다.Hereinafter, the present invention will be described in more detail.

[작 용][Action]

폴리스티렌은 문헌(J. Org. Chem. 41, 24)에 소개된 바와 같이 폴리스티릴리튬을 중간체로 하여 다양한 유도체를 합성하는 방법이 있다. 폴리스티렌의 리튬화반응은 스티렌 중합체를 용매에 녹이지 않고 분산상태에서 반응시킬 수가 있으므로 내화학성이 뛰어나 일반 범용용매에 거의 녹지 않는 신디오탁틱 폴리스티렌의 개질방법으로 적합하다.Polystyrene has a method of synthesizing various derivatives using polystyryl lithium as an intermediate as introduced in J. Org. Chem. 41, 24. Lithiation of polystyrene is suitable as a method of modifying syndiotactic polystyrene, which is excellent in chemical resistance and hardly soluble in a general general solvent because the styrene polymer can be reacted in a dispersed state without dissolving the styrene polymer in a solvent.

또한 폴리스티릴리튬은 부타디엔과 같은 단량체를 공급하여 줄 경우 음이온중합의 중합개시점으로 이용이 가능하다.In addition, polystyryllithium can be used as a starting point of polymerization of anion polymerization when a monomer such as butadiene is supplied.

본 발명은 이러한 점을 응용하여 불균일 분산상에서 폴리스티렌 단독 중합체의 경우는 스티렌의 페닐기, 폴리스티렌/알킬스티렌 공중합체의 경우는 폴리스티렌의 페닐기 일부와 알킬스티렌의 알킬기를 리튬화시킨 후 이를 부타디엔과 같은 단량체의 이온중합 개시점으로 이용하여 폴리스티렌에 부타디엔 등을 그라프트 반응시키는 것이다.The present invention is applied to this point in the heterogeneous dispersed phase in the case of polystyrene homopolymer, the phenyl group of styrene, in the case of polystyrene / alkyl styrene copolymer, lithiated a part of the phenyl group of polystyrene and the alkyl group of alkyl styrene, and then the monomers such as butadiene Graft reaction of butadiene and the like to polystyrene is used as an ion polymerization starting point.

특히, 알킬스티렌을 포함하는 공중합체인 경우는 알킬 스티렌의 알킬기의 알킬 리튬에 대한 반응성이 스티렌의 페닐기의 그것에 비해 훨씬 높으므로 적은 량의 알킬 리튬으로도 쉽게 리튬화를 유도할 수가 있다.In particular, in the case of a copolymer containing alkyl styrene, the reactivity of the alkyl group of the alkyl styrene to the alkyl lithium is much higher than that of the phenyl group of the styrene, so that a small amount of alkyl lithium can easily induce lithiation.

따라서 본 발명의 탄성체로 그라프트된 신디오탁틱 폴리스티렌의 제조방법은 신디오탁틱 폴리스티렌을 시클로 헥산용액 중에 분산시킨 후 테트라메틸에틸렌디아민(TMEDA; tetramethylethylenediamine)과 알킬 리튬을 순차적으로 투입하여 신디오탁틱 폴리스티렌의 페닐기 일부를 리튬화시킨 후 부타디엔 단량체를 투입하여 그라프트 중합체를 제조하는 것이다.Therefore, in the method for preparing syndiotactic polystyrene grafted with the elastomer of the present invention, after syndiotactic polystyrene is dispersed in a cyclohexane solution, tetramethylethylenediamine (TMEDA) and alkyl lithium are sequentially added to syndiotactic polystyrene. Part of the phenyl group of the lithiated, butadiene monomer is added to prepare a graft polymer.

이하에서는 본 발명의 그라프트된 신디오탁틱 폴리스티렌을 제조하는 공정을 구체적으로 설명한다.Hereinafter, the process for producing the grafted syndiotactic polystyrene of the present invention will be described in detail.

(신디오탁틱 폴리스티렌의 제조)(Production of Syndiotactic Polystyrene)

질소분위기의 밀폐된 반응기내에 스티렌 단량체 단독으로 또는 알킬 스티렌 단량체를 포함하여 산소 및 수분을 제거한 벤젠, 톨루엔, 크릴렌, 에틸 벤젠등의 방향족 용제에 녹이거나 또는 용제없이 교반한다.In a closed reactor in a nitrogen atmosphere, either styrene monomer alone or an alkyl styrene monomer is dissolved in an aromatic solvent such as benzene, toluene, kylene, ethyl benzene, etc., in which oxygen and water are removed, or stirred without a solvent.

이때 알킬 스티렌 단량체는 하기 화학식 1에 나타낸 것과 같은 구조로 R은 메틸, 에틸, 프로필, 부틸기 등 다양한 것이 될 수 있다. 가장 바람직한 것은 메틸 스티렌이다. 메틸기의 위치는 3, 4, 또는 3, 4 위치의 혼합이 될 수 있다.At this time, the alkyl styrene monomer may have various structures such as methyl, ethyl, propyl, butyl, and the like as shown in Chemical Formula 1. Most preferred is methyl styrene. The position of the methyl group can be 3, 4, or a mixture of 3, 4 positions.

[화학식 1][Formula 1]

상기 식에서, R은 알킬기이다.Wherein R is an alkyl group.

이러한 알킬 스티렌 단량체는 총단량체중 0.2∼15 ㏖%가 적당하며, 더욱 바람직하게는 2∼5 ㏖%가 적당하다.As for such alkyl styrene monomer, 0.2-15 mol% is suitable in a total monomer, More preferably, 2-5 mol% is suitable.

알루미녹산, 특히 알킬 알루미녹산을 스티렌 단량체에 대해 1∼10 ㏖%로 투입한다. 알루미녹산은 반응기 내부의 불순물제거를 위해 과량 투입할 수 있다.Aluminoxanes, especially alkyl aluminoxanes, are charged at 1 to 10 mol% relative to the styrene monomer. Aluminoxane may be added in excess to remove impurities in the reactor.

알루미녹산을 투입한 후 티타늄계 촉매를 알루미녹산의 알루미늄원자에 대해 1/400∼1/1000 투입한다.After the addition of aluminoxane, a titanium catalyst is added to 1/400 to 1/1000 of the aluminum atom of the aluminoxane.

촉매투입 후 약 1∼2 시간 경과 후 알코올과 염산의 혼합용액을 투입하여 반응을 종결시키고, 잔류하는 촉매는 염산으로 세척 제거한 후 남은 신디오탁틱. 폴리스티렌을 회수 건조한다.After 1 ~ 2 hours after the addition of the catalyst, a mixed solution of alcohol and hydrochloric acid was added to terminate the reaction. The remaining catalyst was washed and removed with hydrochloric acid to remain syndiotactic. The polystyrene is recovered and dried.

제조된 신디오탁틱 폴리스티렌은 분자량이 25만∼35만이며, 90 % 이상 입체규칙구조를 갖는다.The prepared syndiotactic polystyrene has a molecular weight of 250,000 to 350,000, and has a stereoregular structure of 90% or more.

(신디오탁틱 폴리스티렌의 리튬화)(Lithiation of Syndiotactic Polystyrene)

상기에서 제조된 신디오탁틱 폴리스티렌을 교반기가 부착된 질소분위기의 밀폐된 반응기에 넣고 수분 및 산소가 제거된 시클로 헥산에 분산시킨다. 테트라메틸에틸렌디아민(TMEDA)과 알킬 리튬을 투입한다. 알킬 리튬은 용액의 색이 연한 오렌지색이 되기 시작할 때까지 서서히 투입한다.Syndiotactic polystyrene prepared above is placed in a closed reactor in a nitrogen atmosphere equipped with a stirrer and dispersed in cyclohexane hexane removed from water and oxygen. Tetramethylethylenediamine (TMEDA) and alkyl lithium are added. Alkyl lithium is slowly added until the color of the solution starts to light orange.

상기에서 트리메틸에틸아민의 투입량은 알킬 리튬의 0.4 배에서 2.5 배까지가 적당하며, 바람직하게는 0.7 배 내지 1.5 배이다.The amount of trimethylethylamine added is preferably from 0.4 to 2.5 times the alkyl lithium, and preferably 0.7 to 1.5 times the alkyl lithium.

상기에서 알킬 리튬은 n-부틸리튬, s-부틸리튬등이 가능하다. 알킬 리튬의 투입량은 최종 제품의 물성 및 알킬 스티렌 함량에 따라 변화가 자유로우나, 신디오탁틱 폴리스티렌 1 g에 대해 0.02∼4.0 m㏖이 적당하며, 바람직하게는 0.1∼2.0 m㏖이다.In the above, the alkyl lithium may be n-butyllithium, s-butyllithium or the like. The amount of alkyl lithium is freely changed depending on the physical properties and the alkyl styrene content of the final product, but 0.02 to 4.0 mmol is appropriate for 1 g of syndiotactic polystyrene, and preferably 0.1 to 2.0 mmol.

투입 후 반응기의 온도를 50∼80 ℃로 높인다. 약 30 분 동안 교반하여 주면 신디오탁틱 폴리스티렌의 리튬화가 진행하여 색상이 붉어진다.After the addition, the temperature of the reactor was increased to 50 to 80 ° C. After stirring for about 30 minutes, the lithiation of syndiotactic polystyrene proceeds and the color becomes red.

(폴리부타디엔이 그라프트된 신디오탁틱 폴리스티렌의 제조)(Preparation of Syndiotactic Polystyrene Grafted with Polybutadiene)

반응기의 온도가 완전히 상승하면 부타디엔을 질소로 가압하여 분할 투입한다. 매번 투입시마다 압력이 순간 급상승하였다가 바로 하강하는 것으로 반응 진행 여부를 확인할 수 있다.When the temperature of the reactor rises completely, butadiene is pressurized with nitrogen and dividedly added thereto. The pressure suddenly rises and drops immediately after each injection, so you can see if the reaction is progressing.

부타디엔의 투입량은 자유롭게 변화가 가능하나 반응열 제거 및 추후 회수반응의 편의를 위해 고형분 농도 7∼25 중량%, 가장 바람직하게는 9∼12 중량%가 적당하다.The amount of butadiene can be freely changed, but a concentration of 7 to 25% by weight, most preferably 9 to 12% by weight, is suitable for the removal of the heat of reaction and the convenience of the subsequent recovery reaction.

반응열이 사라져 반응시작 온도와 같아지면 산소를 제거한 메틸알코올을 투입하여 반응을 종결시킨다. 용액의 색상이 붉은 오렌지색에서 노란색으로 변화하면 반응이 종결된 것이다.When the reaction heat disappears and reaches the reaction starting temperature, the reaction is terminated by adding methyl alcohol removed from oxygen. The reaction is complete when the color of the solution changes from red orange to yellow.

반응 종결 후 폴리부타디엔이 그라프트된 신디오탁틱 폴리스티렌을 거른 후 건조하여 회수한다.After completion of the reaction, the syndiotactic polystyrene grafted with polybutadiene is filtered and dried.

본 발명으로 얻어지는 수지 조성물은 내열성, 내충격성이 우수하여 각종 성형품의 소재로서 효과적으로 이용된다.The resin composition obtained by this invention is excellent in heat resistance and impact resistance, and is used effectively as a raw material of various molded articles.

이하의 실시예 및 비교예를 통하여 본 발명을 보다 상세히 설명한다. 단, 실시예는 본 발명을 예시하기 위한 것이지 이들만으로 한정하는 것은 아니다.The present invention will be described in more detail with reference to the following examples and comparative examples. However, an Example is for illustrating this invention and is not limited only to these.

[실시예]EXAMPLE

실시예 1Example 1

(신디오탁틱 폴리스티렌의 제조)(Production of Syndiotactic Polystyrene)

산소 및 수분을 제거한 250 ㎖ 반응기에 스티렌 15.01 ㎖(131 m㏖)을 투입하여 실온에서 교반하고, 알루미녹산 톨루엔 용액 2.83 ㎖(6 m㏖)과 펜타메틸시클로펜타디엔트리메톡시티타늄 0.0075 m㏖을 투입한다. 교반 속도를 높인 후 반응기의 온도를 60 ℃로 승온한다.15.01 mL (131 mmol) of styrene was added to a 250 mL reactor from which oxygen and moisture were removed, followed by stirring at room temperature. Then, 2.83 mL (6 mmol) of aluminoxane toluene solution and 0.0075 mmol of pentamethylcyclopentadienetrimethoxytitanium were added. Input. After increasing the stirring speed, the temperature of the reactor was raised to 60 ° C.

티타늄촉매 투입 1 시간 후 메탄올/염산(중량비 10 : 1) 용액으로 반응을 종결시킨다. 잔류촉매는 염산으로 세척 제거하고, 생성된 폴리머는 알코올로 세척하여 감압 건조시킨다.After 1 hour of titanium catalyst addition, the reaction was terminated with methanol / hydrochloric acid (weight ratio 10: 1) solution. The residual catalyst is washed off with hydrochloric acid, and the resulting polymer is washed with alcohol and dried under reduced pressure.

(신디오탁틱 폴리스티렌의 리튬화)(Lithiation of Syndiotactic Polystyrene)

산소 및 수분을 제거한 500 ㎖ 고압반응기에 시클로헥산 270 ㎖을 넣고 상기에서 제조한 신디오탁틱 폴리스티렌 2 g을 투입하여 심하게 교반시킨다. 트리메틸에틸디아민 1.7 m㏖과 n-부틸리튬 1.0 m㏖을 투입한다. n-부틸리튬의 투입은 조금씩 나누어 한다. 초기에 투입되는 n-부틸리튬은 불순물의 제거를 위한 것이다. 용액의 색이 엷은 오렌지색을 띄기 시작하면 신디오탁틱 폴리스티렌이 리튬화 되기 시작한 것이다.270 ml of cyclohexane was added to a 500 ml high pressure reactor from which oxygen and moisture were removed, and 2 g of syndiotactic polystyrene prepared above was added thereto, followed by vigorous stirring. 1.7 mmol of trimethylethyldiamine and 1.0 mmol of n-butyllithium were added thereto. The addition of n-butyllithium is divided little by little. Initially added n-butyllithium is for the removal of impurities. When the color of the solution began to become pale orange, syndiotactic polystyrene began to lithiate.

반응기의 온도를 60 ℃까지 서서히 올린다. 승온 중 신디오탁틱 폴리스티렌 의 리튬화는 더욱 진행되어 용액의 색이 점점 더 붉어진다.Slowly raise the temperature of the reactor to 60 ° C. The lithiation of syndiotactic polystyrene during heating increases further and the color of the solution becomes more red.

(부타디엔 그라프트 반응)(Butadiene graft reaction)

승온이 끝나면 부타디엔 단량체를 10 g씩 분할 하여 5 분 간격으로 반응기에 넣는다. 부타디엔 투입시마다 압력이 순간 상승하나 바로 단량체가 소모되어 압력이 하강하게 된다.After the temperature increase, butadiene monomer was divided into 10 g portions and put into the reactor at 5 minute intervals. The pressure rises every time butadiene is injected, but the monomer is consumed and the pressure drops.

반응시작 후 1 시간이 되면 메탄올을 투입하여 반응을 종결시킨다.1 hour after the start of the reaction, methanol is added to terminate the reaction.

반응 후 시클로헥산과 시클로헥산에 녹아있는 부타디엔 호모폴리머를 걸러 제거하고 감압 건조하여 폴리부타디엔이 그라프트된 신디오탁틱 폴리스티렌을 회수한다.After the reaction, butadiene homopolymer dissolved in cyclohexane and cyclohexane is filtered off and dried under reduced pressure to recover polybutadiene-grafted syndiotactic polystyrene.

(부타디엔 중합체의 분자량)(Molecular Weight of Butadiene Polymer)

반응 후 거른 시클로 헥산에 녹아있는 부타디엔 호모폴리머를 회수하여 용매를 증발시킨 후 아세톤과 알코올로 세척하여 감압 건조한 후 GPC로 그 분자량을 측정한다.After the reaction, the butadiene homopolymer dissolved in the filtered cyclohexane is recovered, the solvent is evaporated, washed with acetone and alcohol, dried under reduced pressure, and the molecular weight is measured by GPC.

실시예 2Example 2

신디오탁틱 폴리스티렌 제조시 스티렌 15.01 ㎖ 대신 스티렌 13.41 ㎖(117 m㏖)과 p-메틸스티렌 1.71 ㎖(13 m㏖)을 넣는 것을 제외하고는 실시예 1과 동일하게 진행한다.Synthetic polystyrene was prepared in the same manner as in Example 1, except that 13.41 ml (117 mmol) of styrene and 1.71 ml (13 mmol) of p-methylstyrene were added instead of 15.01 ml of styrene.

실시예 3Example 3

신디오탁틱 폴리스티렌의 리튬화 반응시 알킬 리튬의 투입량을 2.0 m㏖로 하는 것을 제외하고는 실시예 1과 동일하게 진행한다.Proceed in the same manner as in Example 1, except that the amount of alkyl lithium added during the lithiation reaction of syndiotactic polystyrene is 2.0 mmol.

실시예 4Example 4

신디오탁틱 폴리스티렌의 리튬화 반응시 알킬 리튬의 투입량을 2.0 m㏖로 하는 것을 제외하고는 실시예 2와 동일하게 진행한다.In the lithiation reaction of syndiotactic polystyrene, it proceeds in the same manner as in Example 2 except that the amount of alkyl lithium added is 2.0 mmol.

비교예 1Comparative Example 1

신디오탁틱 폴리스티렌의 제조는 실시예 1과 동일하나, 이후의 리튬화 반응 및 부타디엔 그라프트 반응을 실시하지 않는다.Preparation of syndiotactic polystyrene is the same as in Example 1, but subsequent lithiation and butadiene graft reaction are not performed.

비교예 2Comparative Example 2

잘게 자른 부타디엔 고무 10 g을 산소 및 수분을 제거한 250 ㎖ 반응기에 넣고 스티렌 15.01 ㎖(131 m㏖)을 투입한 후 교반시켜 녹인다. 부타디엔 고무가 완전히 녹은 후 알루미녹산 톨루엔 용액 2.83 ㎖(6 m㏖)과 펜타메틸시클로펜타디엔 트리메톡시 티타늄 0.0075 m㏖을 투입한다. 교반속도를 높인 후 반응기의 온도를 60 ℃로 승온한다.10 g of finely divided butadiene rubber is placed in a 250 ml reactor from which oxygen and moisture are removed, and 15.01 ml (131 mmol) of styrene is added and stirred to dissolve. After the butadiene rubber is completely dissolved, 2.83 ml (6 mmol) of aluminoxane toluene solution and 0.0075 mmol of pentamethylcyclopentadiene trimethoxy titanium are added thereto. After increasing the stirring speed, the temperature of the reactor was raised to 60 ° C.

티타늄촉매 투입 1 시간 후 메탄올/염산(중량비 10:1) 용액으로 반응을 종결 시킨다. 잔류촉매는 염산으로 세척제거하고 생성된 폴리머는 알코올로 세척하여 감압 건조시킨다.After 1 hour of titanium catalyst addition, the reaction was terminated with methanol / hydrochloric acid (weight ratio 10: 1) solution. The residual catalyst is washed away with hydrochloric acid and the resulting polymer is washed with alcohol and dried under reduced pressure.

본 발명에 따르는 제조방법으로 얻어지는 신디오타틱 폴리스티렌 수지는 내열성, 내충격성이 우수하여 각종 성형품의 소재로 효과적으로 이용될 수 있다.Syndiotactic polystyrene resin obtained by the manufacturing method according to the present invention is excellent in heat resistance and impact resistance can be effectively used as a material of various molded articles.

Claims (6)

a) 신디오탁틱 폴리스티렌을 알킬 리튬으로 리튬화시키는 단계; 및a) lithiating syndiotactic polystyrene with alkyl lithium; And b) 상기 a)단계에서 리튬화된 신디오탁틱 폴리스티렌에 부타디엔 단량체를b) Butadiene monomer to the lithiated syndiotactic polystyrene in step a) 그라프트시키는 단계Grafting Step 를 포함하는 내충격성이 우수한 신디오탁틱 폴리스티렌의 제조 방법.Method for producing syndiotactic polystyrene excellent impact resistance comprising a. 제 1 항에 있어서,The method of claim 1, 상기 a)단계의 신디오탁틱 폴리스티렌이 알킬스티렌 0.2∼15 ㏖%를 함유한 내충격성이 우수한 신디오탁틱 폴리스티렌의 제조 방법.A method for producing syndiotactic polystyrene having excellent impact resistance, wherein the syndiotactic polystyrene of step a) contains 0.2 to 15 mol% of alkyl styrene. 제 1 항 또는 제 2 항에 있어서,The method according to claim 1 or 2, 상기 a)의 리튬화시키는 단계가The lithiation of a) 신디오탁틱 폴리스티렌을 시클로 헥산용액 중에 분산시킨 후The syndiotactic polystyrene is dispersed in a cyclohexane solution ⅰ) 테트라메틸에틸렌디아민(TMEDA; tetramethylethylenediamine); 및Iii) tetramethylethylenediamine (TMEDA; tetramethylethylenediamine); And ⅱ) 알킬 리튬Ii) alkyl lithium 을 순차적으로 투입하는 단계를 포함하는 내충격성이 우수한 신디오탁틱 폴리스티렌의 제조 방법.Method of producing a syndiotactic polystyrene excellent impact resistance comprising the step of sequentially inputting. 제 3 항에 있어서,The method of claim 3, wherein 상기 ⅰ)의 테트라메틸에틸렌디아민의 투입량이 알킬 리튬 투입량의 0.4 배 내지 2.5 배인 내충격성이 우수한 신디오탁틱 폴리스티렌의 제조 방법.A method for producing syndiotactic polystyrene having excellent impact resistance, wherein the amount of tetramethylethylenediamine in iii) is 0.4 to 2.5 times the amount of alkyl lithium. 제 3 항에 있어서,The method of claim 3, wherein 상기 ⅱ)의 알킬 리튬의 투입량이 신디오탁틱 폴리스티렌 1 g에 대해 0.02∼4.0 m㏖인 내충격성이 우수한 신디오탁틱 폴리스티렌의 제조 방법.A method for producing syndiotactic polystyrene having excellent impact resistance, wherein the amount of alkyl lithium of ii) is 0.02 to 4.0 mmol relative to 1 g of syndiotactic polystyrene. 제 3 항에 있어서,The method of claim 3, wherein 상기 ⅱ)의 알킬 리튬이 n-부틸리튬, 또는 s-부틸리튬인 내충격성이 우수한 신디오탁틱 폴리스티렌의 제조 방법.A method for producing syndiotactic polystyrene having excellent impact resistance, wherein the alkyl lithium of ii) is n-butyllithium or s-butyllithium.
KR10-1999-0045651A 1999-10-20 1999-10-20 Method for preparing syndiotactic polystyrene having superior impact-resistance KR100417252B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR10-1999-0045651A KR100417252B1 (en) 1999-10-20 1999-10-20 Method for preparing syndiotactic polystyrene having superior impact-resistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR10-1999-0045651A KR100417252B1 (en) 1999-10-20 1999-10-20 Method for preparing syndiotactic polystyrene having superior impact-resistance

Publications (2)

Publication Number Publication Date
KR20010037907A true KR20010037907A (en) 2001-05-15
KR100417252B1 KR100417252B1 (en) 2004-02-05

Family

ID=19616199

Family Applications (1)

Application Number Title Priority Date Filing Date
KR10-1999-0045651A KR100417252B1 (en) 1999-10-20 1999-10-20 Method for preparing syndiotactic polystyrene having superior impact-resistance

Country Status (1)

Country Link
KR (1) KR100417252B1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61151203A (en) * 1984-12-26 1986-07-09 Toa Nenryo Kogyo Kk Production of precursor of styrene polymer
CA2024532C (en) * 1990-03-26 1999-11-16 George Jalics Comb polymers having a halobutyl rubber backbone
JP3101028B2 (en) * 1990-12-10 2000-10-23 出光興産株式会社 Graft copolymer and method for producing the same
US5508353A (en) * 1993-03-29 1996-04-16 Mobil Oil Corporation Comb graft polymers and their use in functional fluids
JP3923183B2 (en) * 1998-06-16 2007-05-30 本田技研工業株式会社 Vehicle distance measuring device

Also Published As

Publication number Publication date
KR100417252B1 (en) 2004-02-05

Similar Documents

Publication Publication Date Title
US3326881A (en) Polymerization of vinylidene-containing monomers with an initiator consisting of an alkali metal derivative of a functional halogen-substituted aromatic compound
CN1049666C (en) Process for the preparation of thermoplastic elastomeric block copolymers derived from conjugated dienes and methyl methacrith improved heat resistance, and products obtained
US3949020A (en) Thermoplastic block polymers
KR100279347B1 (en) Manufacturing Method of Polydimethylsiloxane Block Copolymer
US4182818A (en) Polyfunctional lithium containing initiator
US3891721A (en) Block polymers of styrene-butadiene-2-vinylpyridine
JPH01131221A (en) Methacrylate and block copolymer of derivative thereof
US4427837A (en) Process for preparation of diene-styrene-α-methylstyrene block polymers and polymers therefrom
US4196153A (en) Polyfunctional lithium containing initiator
JPS6235401B2 (en)
JP3281366B2 (en) Method for producing copolymer of conjugated diene and vinyl aromatic compound
US4839434A (en) Preparation of homo- and copolymers having terminal mercapto groups and their use
JPS633003A (en) Anion polymerization
CA2095713A1 (en) Polymers having stable anhydride rings
CN101910226B (en) Semi-continuous integrated process for the production of high impact vinyl aromatic (co)polymers by anionic/radical polymerization in sequence
KR100417252B1 (en) Method for preparing syndiotactic polystyrene having superior impact-resistance
US5744558A (en) 1,5-diethenylnaphthalene compounds and bifunctional primers for anionic polymerization prepared therefrom
US6756448B2 (en) Styrene copolymer
KR100380012B1 (en) Method for preparing syndiotactic polystyrene having impact-resistance and compatibility
JPH0446966B2 (en)
WO1986005793A1 (en) Improved methacrylate polymers and compositions
KR860001032B1 (en) A process for preparation of copolymers of isopropenyl aromatic monomer and vinyl aromatic monomer
EP0261069A2 (en) Triblock polymer and synthesis technique
KR100425244B1 (en) Block copolymer having superior processability and method for preparing thereof and resin composition comprising of the same
JPS5810411B2 (en) How to find out how to get started

Legal Events

Date Code Title Description
A201 Request for examination
N231 Notification of change of applicant
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20091228

Year of fee payment: 7

LAPS Lapse due to unpaid annual fee