KR20050075197A - Composition of thermal cured overcoat for color filter - Google Patents
Composition of thermal cured overcoat for color filter Download PDFInfo
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Abstract
본 발명은 TFT-LCD 칼라필터용 열 경화성 평탄화막(Overcoat)의 조성물에 관한 것으로서, 다음 화학식 1로 표시되는 열 경화성 공중합체 12∼20중량%, 보조 경화제 5∼20중량%, 용매 70∼85중량% 및 첨가제 0.1∼1중량%를 포함함으로써 우수한 성능의 투명도, 평탄도 및 경도를 갖는 칼라필터용 열 경화성 평탄화막을 제조할 수 있는 조성물을 제공한다.The present invention relates to a composition of a thermosetting flattening film (Overcoat) for a TFT-LCD color filter, 12 to 20% by weight of the thermosetting copolymer represented by the following formula (1), 5 to 20% by weight of an auxiliary curing agent, solvent 70 to 85 Provided is a composition which can produce a thermosetting flattening film for color filters having transparency, flatness and hardness of excellent performance by including weight% and 0.1 to 1% by weight of additives.
상기 식에 있어서, X는 올레핀 또는 하이드록시기, 카르복실산기, 에테르기, 나이트릴기 및 에스테르로부터 선택된 기능기를 갖는 올레핀 단량체로부터 유래된 것이고, R1과 R3는 서로 다른 것으로 수소원자 또는 메틸기이며, R2와 R 4는 서로 다른 것으로 수소원자, 글리시딜메틸기, 하이드록시알킬기 또는 탄소수 1 내지 33인 알킬기이고, Y는 케톤, 에스테르, 하이드록시, 에테르, 할로겐, 니트릴 및 알콕시로부터 선택된 기능기를 갖거나 갖지 않는 올레핀 화합물, 스타이렌 유도체, 또는 아크릴로나이트릴 단량체로부터 유래된 것이며, l, m, n 및 o는 중합체의 반복단위로서 l은 0<l/(l+m+n+o)<0.7, m은 0.1<m/(l+m+n+o)<0.7, n은 0≤n/(l+m+n+o)<0.5 및 0≤o/(l+m+n+o)<0.5인 조건을 만족한다.In the above formula, X is derived from an olefin monomer having a functional group selected from an olefin or a hydroxyl group, a carboxylic acid group, an ether group, a nitrile group and an ester, and R 1 and R 3 are different from each other and are a hydrogen atom or a methyl group. , R 2 and R 4 are different from each other hydrogen, glycidylmethyl, hydroxyalkyl or alkyl group having 1 to 33 carbon atoms, Y is a functional group selected from ketones, esters, hydroxy, ethers, halogens, nitriles and alkoxy Derived from an olefin compound, a styrene derivative, or an acrylonitrile monomer, with l, m, n and o being the repeating units of the polymer where l is 0 <l / (l + m + n + o) <0.7, m is 0.1 <m / (l + m + n + o) <0.7, n is 0≤n / (l + m + n + o) <0.5 and 0≤o / (l + m + n + o) satisfies the condition of <0.5.
Description
본 발명은 TFT-LCD 칼라필터용 열 경화성 평탄화막의 조성물에 관한 것으로서, 더욱 상세하게는 투명도와 평탄도 그리고 경도가 우수한 박막 조성물에 관한 것이다. The present invention relates to a composition of a thermosetting flattening film for TFT-LCD color filters, and more particularly to a thin film composition having excellent transparency, flatness and hardness.
최근 TFT-LCD 산업에서 액정 화면이 급속히 대형화되는 추세를 보이고 있으며, 이러한 대형 액정 화면 구현을 위해서는 투명도와 평탄도 그리고 경도가 우수한 박막 물질이 필요하다. 이에 따라 TFT-LCD 공정에서 내부 평탄화 및 칼라필터 상부보호를 위한 박막에 대한 관심이 점차 높아지고 있다.Recently, the liquid crystal display has been rapidly enlarged in the TFT-LCD industry. In order to realize such a large liquid crystal display, a thin film material having excellent transparency, flatness and hardness is required. Accordingly, interest in thin films for internal planarization and color filter upper protection in TFT-LCD processes is gradually increasing.
TFT-LCD 칼라필터용 평탄화막을 제조하는 기술은 크게 2가지로 나누어진다. 첫 번째 방법은 감광성 중합체와 라디칼 개시제를 사용하여 노광을 통해 가교시켜 박막을 형성하는 방법이고, 두 번째 방법은 에폭시나 하이드록시 기능기가 포함된 중합체, 경화용 촉매와 보조 경화제를 사용하여 열에 의한 가교를 통해 박막을 형성하는 방법이다. 이중에서 감광성 중합체와 라디칼 개시제를 이용하여 박막을 제조하는 기술은 공기 중의 산소를 차단해야 하는 단점과 공정 상에 있어서 노광단계를 거쳐야 하는 복잡한 면이 있어서 최근에는 두 번째 방법인 열 경화성 평탄화막에 대한 연구가 활발히 진행되어지고 있다.The technology for manufacturing the flattening film for TFT-LCD color filter is largely divided into two types. The first method uses a photosensitive polymer and a radical initiator to crosslink through exposure to form a thin film. The second method uses a polymer containing an epoxy or hydroxy functional group, and a thermal crosslinking using a curing catalyst and an auxiliary curing agent. It is a method of forming a thin film through. Among them, a technique of manufacturing a thin film using a photosensitive polymer and a radical initiator has disadvantages of blocking oxygen in the air and a complicated aspect of undergoing an exposure step in the process. Research is actively underway.
일반적으로 TFT-LCD 칼라필터용 평탄화막의 요구 사항은 200∼250℃ 범위의 고온 처리과정 후에 400∼800nm 파장 범위에서 95% 이상의 투과율을 가져야 하고 90% 이상의 평탄도와 연필경도계로 4H 이상의 경도를 가져야 한다. In general, the requirements of the flattening film for TFT-LCD color filters should have a transmittance of at least 95% in the wavelength range of 400 to 800 nm after a high temperature treatment in the range of 200 to 250 ° C, a flatness of at least 90% and a hardness of at least 4H with a pencil hardness tester. .
그런데, 현재까지의 열 경화성 평탄화막 조성물들은 투과도와 평탄도 그리고 경도에 있어서 상기의 요구 조건들을 만족시킬 수 없었으며, 또한 상기 조건들 중에 일부를 만족시킨다 하더라도 칼라필터와의 접착력, 코팅 균일성 등을 확보하는데 여전히 어려운 문제점이 존재하였다.However, the thermosetting planarizing film compositions to date have not been able to satisfy the above requirements in terms of permeability, flatness and hardness, and even if some of the above conditions are satisfied, adhesion to the color filter, coating uniformity, etc. There was still a difficult problem to secure.
이에, 본 발명의 목적은 TFT-LCD 칼라필터 제조 시 요구되는 95% 이상의 투명도, 90% 이상의 평탄도, 4H 이상의 경도를 갖고 접착력과 코팅 균일성이 우수한 열 경화성 평탄화막의 조성물을 제공하는데 있다. Accordingly, it is an object of the present invention to provide a composition of a thermosetting flattening film having a transparency of 95% or more, a flatness of 90% or more, a hardness of 4H or more, and excellent adhesion and coating uniformity.
상기와 같은 목적을 달성하기 위한 본 발명의 열경화성 평탄화막의 조성물은 다음 화학식 1로 표시되는 열 경화성 공중합체 12∼20중량%, 보조 경화제 5∼20중량%, 전체 용매 중 10∼50중량% 되도록 알킬 카비톨을 포함하는 용매 70∼85중량% 및 첨가제 0.1∼1중량%를 포함하는 것임을 그 특징으로 한다. The composition of the thermosetting flattening film of the present invention for achieving the above object is 12 to 20% by weight of the thermosetting copolymer represented by the following formula (1), 5 to 20% by weight of the auxiliary curing agent, 10 to 50% by weight of the total solvent alkyl And 70 to 85% by weight of a solvent comprising carbitol and 0.1 to 1% by weight of an additive.
화학식 1Formula 1
상기 식에 있어서, X는 올레핀 또는 하이드록시기, 카르복실산기, 에테르기, 나이트릴기 및 에스테르로부터 선택된 기능기를 갖는 올레핀 단량체로부터 유래된 것이고, R1과 R3는 서로 다른 것으로 수소원자 또는 메틸기이며, R2와 R 4는 서로 다른 것으로 수소원자, 글리시딜메틸기, 하이드록시알킬기 또는 탄소수 1 내지 33인 알킬기이고, Y는 케톤, 에스테르, 하이드록시, 에테르, 할로겐, 니트릴 및 알콕시로부터 선택된 기능기를 갖거나 갖지 않는 올레핀 화합물, 스타이렌 유도체, 또는 아크릴로나이트릴 단량체로부터 유래된 것이며, l, m, n 및 o는 중합체의 반복단위로서 l은 0<l/(l+m+n+o)<0.7, m은 0.1<m/(l+m+n+o)<0.7, n은 0≤n/(l+m+n+o)<0.5 및 0≤o/(l+m+n+o)<0.5인 조건을 만족한다.In the above formula, X is derived from an olefin monomer having a functional group selected from an olefin or a hydroxyl group, a carboxylic acid group, an ether group, a nitrile group and an ester, and R 1 and R 3 are different from each other and are a hydrogen atom or a methyl group. , R 2 and R 4 are different from each other hydrogen, glycidylmethyl, hydroxyalkyl or alkyl group having 1 to 33 carbon atoms, Y is a functional group selected from ketones, esters, hydroxy, ethers, halogens, nitriles and alkoxy Derived from an olefin compound, a styrene derivative, or an acrylonitrile monomer, with l, m, n and o being the repeating units of the polymer where l is 0 <l / (l + m + n + o) <0.7, m is 0.1 <m / (l + m + n + o) <0.7, n is 0≤n / (l + m + n + o) <0.5 and 0≤o / (l + m + n + o) satisfies the condition of <0.5.
이와같은 본 발명을 더욱 상세하게 설명하면 다음과 같다.The present invention will be described in more detail as follows.
<열경화성 공중합체><Thermosetting Copolymer>
상기 화학식 1로 표시되는 열경화성 공중합체는 주쇄에 올레핀 유도체인 단량체와 하이드록시알킬기, 하이드록시기, 글리시딜기 또는 알킬기 중에서 선택된 기능기를 가진 아크릴 또는 메타아크릴 단량체를 포함하고, 측쇄에는 하이드록시기 또는 에폭시기 등과 같은 경화가 가능한 관능기를 포함하는 것이 그 특징이다. The thermosetting copolymer represented by Chemical Formula 1 includes an acryl or methacryl monomer having a functional group selected from a monomer which is an olefin derivative in the main chain and a hydroxyalkyl group, a hydroxy group, a glycidyl group or an alkyl group, and in the side chain a hydroxy group or It is a feature to include a functional group capable of curing, such as an epoxy group.
경우에 따라서는 평탄도, 경도, 접착력 등을 향상시키기 위해 스타이렌 유도체, 아크릴로나이트릴 또는 하이드록시기 등이 포함된 올레핀 유도체를 단량체로 추가하여 중합체를 합성할 수도 있다. In some cases, the polymer may be synthesized by adding an olefin derivative including a styrene derivative, an acrylonitrile, or a hydroxyl group as a monomer to improve flatness, hardness, adhesion, and the like.
공중합체는 중합체 내의 단량체의 종류 및 함량에 따라 그 물리적 화학적 성능이 달라지게 된다. 일반적으로 중합체가 친수성이 강하면 접착력은 증가하나 박막의 경도가 떨어지는 단점이 있다. 또한 친수성이나 소수성이 너무 높으면 유기 용매에 대한 용해도가 떨어지는 단점을 갖는다.The copolymer has different physical and chemical performances depending on the type and content of monomers in the polymer. In general, when the polymer is hydrophilic, the adhesive strength increases, but the hardness of the thin film is deteriorated. In addition, if the hydrophilicity or hydrophobicity is too high, solubility in organic solvents is poor.
상기 화학식 1로 표시되는 중합체의 겔퍼미션 크로마토그래피(GPC)에 의한 폴리스티렌 환산 중량 평균 분자량(이하 "Mw"하 함)은 2,000 내지 1,000,000인 바, 박막으로서의 도포성 및 경도 등을 고려하면 3,000 내지 50,000인 것이 바람직하다. 중합체의 분자량 분포는 1.0 내지 5.0이 바람직하며, 특히 바람직하게는 1.0 내지 3.0이다.The polystyrene reduced weight average molecular weight (hereinafter referred to as "Mw") by gel permeation chromatography (GPC) of the polymer represented by Chemical Formula 1 is 2,000 to 1,000,000, considering the applicability, hardness, and the like as a thin film, 3,000 to 50,000 Is preferably. The molecular weight distribution of the polymer is preferably 1.0 to 5.0, particularly preferably 1.0 to 3.0.
이와같은 화학식 1로 표시되는 열경화성 중합체의 함량은 전체 박막 조성 중 12중량% 내지 20중량%인 바, 만일 그 함량이 12중량% 미만이면 박막의 두께가 너무 얇아 평탄도가 나빠지고 20중량% 이상이면 박막의 두께가 너무 두꺼워지는 문제가 있다. 일반적으로 요구되는 박막의 두께는 R.G.B Glass가 아닌 평탄한 반도체용 실리콘 웨이퍼에 형성하였을때 1.2∼2.0㎛이다.The content of the thermosetting polymer represented by Formula 1 is 12% by weight to 20% by weight of the total thin film composition. If the content is less than 12% by weight, the thickness of the thin film is too thin, resulting in poor flatness and 20% by weight or more. There is a problem that the thickness of the thin film is too thick. Generally, the required thickness of the thin film is 1.2 to 2.0 탆 when formed on a flat silicon wafer instead of R.G.B glass.
<보조 경화제><Secondary Curing Agent>
본 발명에 따른 상기 화학식 1로 표시되는 중합체 중 자체 내에 경화 반응이 진행될 수 있는 관능기가 있는 경우에는 별도의 중합체나 보조 경화제를 첨가할 필요는 없으나, 경우에 따라서는 박막의 경도를 조절하거나 접착력을 높이기 위한 수단으로 보조 경화제를 첨가할 수 있다. In the polymer represented by Formula 1 according to the present invention, when there is a functional group capable of undergoing a curing reaction, it is not necessary to add a separate polymer or an auxiliary curing agent, but in some cases, the hardness of the thin film may be adjusted or the adhesive force may be adjusted. Auxiliary curing agent can be added as a means to increase.
보조 경화제로는 하이드록시페닐기가 있는 단량체 또는 폴리머, 글리시딜기가 2개 이상 치환된 폴리올류의 중합체 또는 단량체가 있는 폴리머 중에서 선택하여 사용할 수 있는 바, 일예로 비스페놀 A 프로폭시에이트 디글리시딜 에테르, 트리페닐올메탄 트리글리시딜 에테르, 비스페놀 A 또는 1,1,1-트리스(4-하이드록시페닐)에탄, 폴리하이드록시스티렌 등을 들 수 있다. The auxiliary curing agent can be selected from a monomer or polymer having a hydroxyphenyl group, a polymer of a polyol substituted with two or more glycidyl groups, or a polymer having a monomer. For example, bisphenol A propoxylate diglycidyl Ether, triphenylolmethane triglycidyl ether, bisphenol A or 1,1,1-tris (4-hydroxyphenyl) ethane, polyhydroxystyrene and the like.
이와같은 보조경화제를 첨가하는 경우 그 함량은 전체 박막 조성 중 20중량% 이내인 것이 바람직한 바, 만일 그 함량이 5중량% 이내이면 경도가 약해지거나 특히 평탄도가 나빠지게 되고 20중량%를 초과하면 경도가 너무 강하여 칼라필터와의 접착력이 약해지거나 표면에 균열이 발생할 수 있다. If such a co-curing agent is added, the content is preferably within 20% by weight of the total thin film composition. If the content is within 5% by weight, the hardness becomes weak or especially the flatness becomes poor and exceeds 20% by weight. The hardness is so strong that the adhesion to the color filter may be weakened or the surface may be cracked.
<첨가제><Additive>
첨가제로는 박막의 균일성을 높이거나 용액의 혼화성을 높이기 위해 비이온성 계면활성제를 사용할 수도 있으며, 박막조성물의 보관안정성을 높이기 위해 보관안정제도 사용할 수 있다. As an additive, a nonionic surfactant may be used to increase the uniformity of the thin film or increase the miscibility of the solution, and a storage stabilizer may be used to increase the storage stability of the thin film composition.
보관안정제로는 알려진 산화방지제를 사용할 수 있으며, 각별히 한정되는 것은 아니다.Known antioxidants may be used as the storage stabilizer, and are not particularly limited.
첨가제의 함량은 전체 박막 조성 중 0.1 내지 1중량%인 것이 바람직한 바, 만일 그 함량이 0.1중량% 미만이면 표면 균일성이 떨어지고 얼룩이 발생할 수 있으며 1중량%를 초과하면 경도가 약해지거나 또 다른 얼룩발생의 문제가 있을 수 있다. The content of the additive is preferably 0.1 to 1% by weight of the total thin film composition. If the content is less than 0.1% by weight, surface uniformity may be poor and staining may occur. There may be a problem.
<용매><Solvent>
본 발명에서의 박막 조성물이 균일하고 평탄한 도포막을 얻기 위해서는 적당한 증발속도와 점성을 가진 용매에 용해시켜 사용해야 한다. 이러한 물성을 가진 용매로는 에틸렌글리콜 모노메틸 에테르, 에틸렌글리콜 모노에틸 에테르, 에틸렌글리콜 모노프로필 에테르, 메틸셀로솔브 아세테이트, 에틸셀로솔브 아세테이트, 프로필렌글리콜 모노메틸 에테르 아세테이트, 프로필렌글리콜 모노에틸 에테르 아세테이트, 프로필렌글리콜 모노프로필 에테르 아세테이트(PGMEA), 메틸 이소프로필 케톤, 시클로헥사논, 메틸 2-히드록시프로피온네이트, 에틸 2-히드록시프로피온네이트, 2-헵타논, 메틸 카비톨, 에틸 카비톨, 프로필 카비톨, 에틸 락테이트, 감마-부티로락톤 등을 들 수 있는 바, 이들 중에서 메틸 카비톨, 에틸 카비톨 또는 프로필 카비톨과 같은 알킬 카비톨을 반드시 혼용하여야 한다. In order to obtain a uniform and flat coating film, the thin film composition of the present invention should be dissolved in a solvent having an appropriate evaporation rate and viscosity. Solvents having these properties include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, methyl cellosolve acetate, ethyl cellosolve acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate , Propylene glycol monopropyl ether acetate (PGMEA), methyl isopropyl ketone, cyclohexanone, methyl 2-hydroxypropionate, ethyl 2-hydroxypropionate, 2-heptanone, methyl carbitol, ethyl carbitol, propyl Carbitol, ethyl lactate, gamma-butyrolactone, and the like, among which alkyl carbitol such as methyl carbitol, ethyl carbitol or propyl carbitol must be used interchangeably.
알킬 카비톨은 도포 안정성을 향상시키기 위해 혼용하는 바, 혼용시 그 함량은 전체 용매 중 10 내지 50중량%인 것이 바람직하다. 만일 전체 용매 중 알킬 카비톨을 10중량% 미만으로 혼용하게 되면 코팅 균일성이 떨어지게 되고 50중량%를 초과하여 혼용하게 되면 너무 높은 비점으로 인하여 건조가 잘 안되는 문제가 발생할 수 있으며 코팅 균일성 또한 떨어지게 된다.. Alkyl carbitol is mixed to improve coating stability, and when mixed, the content thereof is preferably 10 to 50% by weight in the total solvent. If the mixing amount of alkyl carbitol in the total solvent is less than 10% by weight, the coating uniformity is lowered. If it is mixed in excess of 50% by weight, too high boiling point may cause a problem of poor drying. do..
이와같은 혼합용매의 함량은 용매의 물성 즉, 휘발성, 점도 등에 따라 적당량 사용하여 박막이 균일하게 형성될 수 있도록 조절하는 것이 바람직한 바, 이를 감안할 때 전체 박막 조성 중 70 내지 85중량%로 사용하는 것이 바람직하다. The amount of such a mixed solvent is preferably adjusted to uniformly form the thin film by using an appropriate amount according to the physical properties of the solvent, that is, volatility, viscosity, etc. In view of this, it is preferable to use 70 to 85% by weight of the total thin film composition. desirable.
만일 용매의 함량이 전체 박막 조성 중 70중량% 미만이거나 85중량%를 초과하면 원하는 박막의 두께를 얻을 수 없다. 바람직한 박막의 두께는 R.G.B Glass가 아닌 평탄한 반도체용 실리콘 웨이퍼에 형성하였을 때 1.2∼2.0㎛이다. If the solvent content is less than 70% by weight or more than 85% by weight of the total thin film composition, the desired thickness of the thin film cannot be obtained. The preferred thin film thickness is 1.2 to 2.0 탆 when formed on a flat silicon wafer other than R.G.B Glass.
이하, 본 발명을 하기 합성예 및 실시예로서 구체적으로 설명하는 바, 본 발명이 이에 한정되는 것은 아니다. Hereinafter, the present invention will be specifically described as the following Synthesis Examples and Examples, but the present invention is not limited thereto.
<중합체의 합성>Synthesis of Polymer
합성예 1 Synthesis Example 1
노보넨 38g과 3-메틸-3-부텐올 38g 그리고 AIBN 15g을 에틸 아세테이트 600g에 녹인 후 반응기를 70℃까지 승온하였다. 이 반응기에 글리시딜 메타아크릴레이트 150g과 t-부틸 아크릴레이트 75g을 4시간에 걸쳐 서서히 적하시켰다. 적하가 끝나면 같은 온도에서 4시간 동안 교반한 후 상온으로 냉각시켰다. 냉각된 반응물을 과량의 헥산 용액에 적하시켜 흰색 침전물을 얻었다. 이 침전물을 진공 건조시켜 상기 화학식 2의 중합체 200g을 얻었다.After dissolving 38 g of norbornene, 38 g of 3-methyl-3-butenol and 15 g of AIBN in 600 g of ethyl acetate, the reactor was heated to 70 ° C. 150 g of glycidyl methacrylate and 75 g of t -butyl acrylate were slowly added dropwise to the reactor over 4 hours. After dropping, the mixture was stirred at the same temperature for 4 hours and then cooled to room temperature. The cooled reaction was added dropwise to excess hexane solution to obtain a white precipitate. The precipitate was dried in vacuo to give 200 g of the polymer of Chemical Formula 2.
합성예 2Synthesis Example 2
노보넨 20g과 3-메틸-3-부텐올 20g 그리고 AIBN 8g을 프로필렌 글리콜 모노메틸 에테르 아세테이트 320g에 녹인 후 반응기를 70℃까지 승온하였다. 이 반응기에 글리시딜 메타아크릴레이트 80g과 메틸 아크릴레이트 40g을 4시간에 걸쳐 서서히 적하시켰다. 적하가 끝나면 같은 온도에서 4시간 동안 교반한 후 상온으로 냉각시켰다. 냉각된 반응물을 과량의 헥산 용액에 적하시켜 흰색 침전물을 얻었다. 이 침전물을 진공 건조시켜 상기 화학식 3의 중합체 123g을 얻었다.20 g of norbornene, 20 g of 3-methyl-3-butenol and 8 g of AIBN were dissolved in 320 g of propylene glycol monomethyl ether acetate, and the reactor was heated to 70 ° C. 80 g of glycidyl methacrylate and 40 g of methyl acrylate were slowly added dropwise to the reactor over 4 hours. After dropping, the mixture was stirred at the same temperature for 4 hours and then cooled to room temperature. The cooled reaction was added dropwise to excess hexane solution to obtain a white precipitate. The precipitate was vacuum dried to obtain 123 g of the polymer of Chemical Formula 3.
합성예 3Synthesis Example 3
3-메틸-3-부텐올 28g과 AIBN 11g을 에틸 아세테이트 450g에 녹인 후 반응기를 70℃까지 승온하였다. 이 반응기에 글리시딜 메타아크릴레이트 112g과 t-부틸 아크릴레이트 56g 그리고 스타이렌 28g을 4시간에 걸쳐 서서히 적하시켰다. 적하가 끝나면 같은 온도에서 4시간 동안 교반한 후 상온으로 냉각시켰다. 냉각된 반응물을 과량의 헥산 용액에 적하시켜 흰색 침전물을 얻었다. 이 침전물을 진공 건조시켜 화학식 4의 중합체 160g을 얻었다.After dissolving 28 g of 3-methyl-3-butenol and 11 g of AIBN in 450 g of ethyl acetate, the reactor was heated to 70 ° C. 112 g of glycidyl methacrylate, 56 g of t -butyl acrylate and 28 g of styrene were slowly added dropwise to the reactor over 4 hours. After dropping, the mixture was stirred at the same temperature for 4 hours and then cooled to room temperature. The cooled reaction was added dropwise to excess hexane solution to obtain a white precipitate. This precipitate was dried in vacuo to give 160 g of the polymer of the formula (4).
합성예 4Synthesis Example 4
노보넨 20g과 3-메틸-3-부텐올 20g 그리고 AIBN 8g을 프로필렌 글리콜 모노메틸 에테르 아세테이트 320g에 녹인 후 반응기를 70℃까지 승온하였다. 이 반응기에 글리시딜 메틸아크릴레이트 80g과 스타이렌 40g을 4시간에 걸쳐 서서히 적하하였다. 적하가 끝나면 같은 온도에서 4시간 동안 교반한 후 상온으로 냉각시켰다. 냉각된 반응물을 과량의 헥산 용액에 적하시켜 흰색 침전물을 얻었다. 이 침전물을 진공 건조시켜 화학식 5의 중합체 100g을 얻었다.20 g of norbornene, 20 g of 3-methyl-3-butenol and 8 g of AIBN were dissolved in 320 g of propylene glycol monomethyl ether acetate, and the reactor was heated to 70 ° C. 80 g of glycidyl methyl acrylate and 40 g of styrene were slowly added dropwise to the reactor over 4 hours. After dropping, the mixture was stirred at the same temperature for 4 hours and then cooled to room temperature. The cooled reaction was added dropwise to excess hexane solution to obtain a white precipitate. This precipitate was dried in vacuo to give 100 g of a polymer of the formula (5).
<박막조성물의 제조 및 성능시험><Manufacturing and performance test of thin film composition>
실시예 1Example 1
상기 합성예 1에서 얻어진 화학식 2의 중합체 13g과 보조경화제로서 페놀기가 있는 단량체로 Aldrich사의 1,1,1-트리스(4-하이드록시페닐)에탄 2.9g, 보관안정제로 스위스 시바가이기사의 Irganox1010 0.03g을 혼합용매인 프로필렌글리콜모노메틸에테르아세테이트(이하 PGMEA) 59g과 에틸 카비톨 25g에 용해시킨 후 0.2㎛ 막 필터로 여과하여 박막 조성물을 조제하였다. 13 g of the polymer of Chemical Formula 2 obtained in Synthesis Example 1 and 2.9 g of 1,1,1-tris (4-hydroxyphenyl) ethane of Aldrich as a monomer having a phenol group as an auxiliary curing agent, and Irganox1010 0.03 of Shivagai, Switzerland as a storage stabilizer. g was dissolved in 59 g of propylene glycol monomethyl ether acetate (hereinafter referred to as PGMEA) and 25 g of ethyl carbitol as a mixed solvent, and then filtered through a 0.2 μm membrane filter to prepare a thin film composition.
얻어진 조성물을 R.G.B(Red, Green, Blue) 도포 공정까지 끝난 칼라필터 기판에 700rpm으로 10초간 회전 도포하고 100℃에서 120초간 가열하여 박막을 형성하였다. 박막이 형성된 R.G.B 칼라필터 기판을 220℃ 오븐에서 40분간 경화시켜 평탄화막을 형성하였다.The obtained composition was spun onto the color filter substrate completed until the R.G.B (Red, Green, Blue) coating step at 700 rpm for 10 seconds and heated at 100 ° C. for 120 seconds to form a thin film. The R.G.B color filter substrate on which the thin film was formed was cured in an oven at 220 ° C. for 40 minutes to form a flattening film.
경화되어 형성된 평탄화막은 R.G.B를 포함하여 2.6∼3.2㎛의 두께로 형성되며, 90% 이상의 평탄도와 경도 측정 결과 8H 이상의 연필경도를 가졌다.The flattening film formed by curing was formed to a thickness of 2.6 to 3.2 탆 including R.G.B, and had a flatness of 90% or more and a pencil hardness of 8H or more as a result of hardness measurement.
또한 가시광선 영역에서의 투과도를 측정하기 위하여 공정이 진행되지 않은 투명한 LCD용 Glass에 700rpm으로 10초간 회전 도포하고 100℃에서 120초간 가열하여 박막을 형성하였다. 박막이 형성된 LCD용 Glass를 220℃오븐에서 40분간 경화시켜 평탄화막을 형성하였다. 경화되어 형성된 평탄화막은 1∼1.5㎛ 두께로 형성되며 95% 이상의 투과도를 보였다.In addition, in order to measure the transmittance in the visible light region to form a thin film by rotating the coating for 10 seconds at 700rpm on a transparent glass for LCD for 10 seconds and then heated at 100 ℃. The thin film-formed LCD glass was cured at 220 ° C. for 40 minutes to form a flattening film. The flattening film formed by curing was formed to a thickness of 1 ~ 1.5㎛ and showed a transmittance of 95% or more.
이때, 경도의 측정은 Pencil Tester법으로 수행하였고, 투과도는 UV Spectrophotometer로 측정하였으며, 평탄도는 SEM(Scanning Electron Microscope)으로 측정하였다.At this time, the hardness was measured by the Pencil Tester method, the transmittance was measured by UV Spectrophotometer, the flatness was measured by SEM (Scanning Electron Microscope).
실시예 2Example 2
상기 실시예 1과 동일한 방법으로 평탄화막을 제조하되, 다만 상기 합성예 1에서 얻어진 화학식 2의 중합체 대신에 상기 합성예 2에서 얻어진 화학식 3의 중합체를 사용하였다. A flattening film was prepared in the same manner as in Example 1, except that the polymer of Formula 3 obtained in Synthesis Example 2 was used instead of the polymer of Formula 2 obtained in Synthesis Example 1.
그 결과 경화되어 형성된 평탄화막은 R.G.B를 포함하여 2.6∼3.2㎛의 두께로 형성되며, 상기 실시예 1과 같은 방법으로 측정시 2B의 연필경도를 가지며, 90% 이상의 평탄도와 95% 이상의 투과도를 보였다.As a result, the flattening film formed by curing was formed to a thickness of 2.6 to 3.2 μm including R.G.B, and had a pencil hardness of 2B as measured in the same manner as in Example 1, and showed flatness of 90% or more and transmittance of 95% or more.
실시예 3Example 3
상기 실시예 1과 동일한 방법으로 평탄화막을 제조하되, 다만 상기 합성예 1에서 얻어진 화학식 2의 중합체 대신에 상기 합성예 3에서 얻어진 화학식 4의 중합체를 사용하였다.A flattening film was prepared in the same manner as in Example 1, except that the polymer of Formula 4 obtained in Synthesis Example 3 was used instead of the polymer of Formula 2 obtained in Synthesis Example 1.
그 결과 경화되어 형성된 평탄화막은 R.G.B를 포함하여 2.6∼3.2㎛의 두께로 형성되고, 상기 실시예 1과 같은 방법으로 측정시 7H의 연필경도를 가지며, 90% 이상의 평탄도와 95% 이상의 투과도를 보였다.As a result, the flattening film formed by curing was formed to a thickness of 2.6 to 3.2 µm including R.G.B, and had a pencil hardness of 7H as measured in the same manner as in Example 1, and showed flatness of 90% or more and transmittance of 95% or more.
실시예 4Example 4
상기 실시예 1과 동일한 방법으로 평탄화막을 제조하되, 다만 상기 합성예 1에서 얻어진 화학식 2의 중합체 대신에 상기 합성예 4에서 얻어진 화학식 5의 중합체를 사용하였다. A flattening film was prepared in the same manner as in Example 1, except that the polymer of Formula 5 obtained in Synthesis Example 4 was used instead of the polymer of Formula 2 obtained in Synthesis Example 1.
그 결과 경화되어 형성된 평탄화막은 R.G.B를 포함하여 2.6~3.2㎛의 두께로 형성되고, 상기 실시예 1과 같은 방법으로 측정시 5H의 연필경도를 가지며, 90% 이상의 평탄도와 95% 이상의 투과도를 보였다.As a result, the flattening film formed by curing was formed to a thickness of 2.6-3.2 μm including R.G.B, and had a pencil hardness of 5H when measured in the same manner as in Example 1, and showed flatness of 90% or more and transmittance of 95% or more.
실시예 5Example 5
상기 실시예 1과 동일한 방법으로 평탄화막을 제조하되, 다만 보조경화제로서 페놀기가 있는 단량체로 Aldrich사의 1,1,1-트리스(4-하이드록시페닐)에탄 대신에 Aldrich사의 비스페놀 A를 사용하였다. A flattening film was prepared in the same manner as in Example 1 except that Aldrich's bisphenol A was used instead of Aldrich's 1,1,1-tris (4-hydroxyphenyl) ethane as a monomer having a phenol group as an auxiliary curing agent.
그 결과 경화되어 형성된 평탄화막은 R.G.B를 포함하여 3.2∼4.2㎛의 두께로 형성되며, 상기 실시예 1과 같은 방법으로 측정시 4H 이상의 연필경도를 가지며, 가시광선 영역에서 95% 이상의 투과도와 90% 이상의 평탄도를 보였다.As a result, the flattening film formed by curing is formed to have a thickness of 3.2 to 4.2 탆 including RGB, and has a pencil hardness of 4H or more when measured in the same manner as in Example 1, and has a transmittance of 95% or more and a 90% or more in the visible light region. Flatness was shown.
실시예 6Example 6
상기 실시예 3과 동일한 방법으로 평탄화막을 제조하되, 다만 보조경화제로서 페놀기가 있는 단량체로 Aldrich사의 1,1,1-트리스(4-하이드록시페닐)에탄 대신에 Aldrich사의 비스페놀 A를 사용하였다. A flattening film was prepared in the same manner as in Example 3, except that Aldrich's bisphenol A was used instead of Aldrich's 1,1,1-tris (4-hydroxyphenyl) ethane as a monomer having a phenol group as an auxiliary curing agent.
그 결과 경화되어 형성된 평탄화막은 R.G.B를 포함하여 3.2∼4.2㎛의 두께로 형성되며, 상기 실시예 1과 같은 방법으로 측정시 4H 이상의 연필경도를 가지며, 가시광선 영역에서 95% 이상의 투과도와 90% 이상의 평탄도를 보였다.As a result, the flattening film formed by curing is formed to have a thickness of 3.2 to 4.2 탆 including RGB, and has a pencil hardness of 4H or more when measured in the same manner as in Example 1, and has a transmittance of 95% or more and a 90% or more in the visible light region. Flatness was shown.
실시예 7Example 7
상기 실시예 4와 동일한 방법으로 평탄화막을 제조하되, 다만 보조경화제로서 페놀기가 있는 단량체로 Aldrich사의 1,1,1-트리스(4-하이드록시페닐)에탄 대신에 Aldrich사의 비스페놀 A를 사용하였다. A flattening film was prepared in the same manner as in Example 4 except that Aldrich's bisphenol A was used instead of Aldrich's 1,1,1-tris (4-hydroxyphenyl) ethane as a monomer having a phenol group as an auxiliary curing agent.
그 결과 경화되어 형성된 평탄화막은 R.G.B를 포함하여 3.2∼4.2㎛의 두께로 형성되며, 상기 실시예 1과 같은 방법으로 측정시 4H 이상의 연필경도를 가지며, 가시광선 영역에서 95% 이상의 투과도와 90% 이상의 평탄도를 보였다.As a result, the flattening film formed by curing is formed to have a thickness of 3.2 to 4.2 탆 including RGB, and has a pencil hardness of 4H or more when measured in the same manner as in Example 1, and has a transmittance of 95% or more and a 90% or more in the visible light region. Flatness was shown.
실시예 8Example 8
상기 실시예 1과 동일한 방법으로 평탄화막을 제조하되, 다만 보조 경화제로 페놀기가 있는 단량체 대신 페놀기가 있는 폴리머인 니폰소다사의 폴리하이드록시스티렌(Polyhydroxystyrene)을 사용하였다. A flattening film was prepared in the same manner as in Example 1 except that polyhydroxystyrene of Nippon Soda Co., Ltd., a polymer having a phenol group instead of a monomer having a phenol group, was used as an auxiliary curing agent.
그 결과 경화되어 형성된 평탄화막은 R.G.B를 포함하여 3.2∼4.2㎛의 두께로 형성되며, 상기 실시예 1과 같은 방법으로 측정시 4H 이상의 연필경도를 가지며, 가시광선 영역에서 95% 이상의 투과도와 90% 이상의 평탄도를 보였다.As a result, the flattening film formed by curing is formed to have a thickness of 3.2 to 4.2 탆 including RGB, and has a pencil hardness of 4H or more when measured in the same manner as in Example 1, and has a transmittance of 95% or more and a 90% or more in the visible light region. Flatness was shown.
실시예 9Example 9
상기 실시예 3과 동일한 방법으로 평탄화막을 제조하되, 다만 보조 경화제로 페놀기가 있는 단량체 대신 페놀기가 있는 폴리머인 니폰소다사의 폴리하이드록시스티렌을 사용하였다. A flattening film was prepared in the same manner as in Example 3, except that polyhydroxystyrene of Nippon Soda Co., Ltd., a polymer having a phenol group instead of a monomer having a phenol group, was used as an auxiliary curing agent.
그 결과 경화되어 형성된 평탄화막은 R.G.B를 포함하여 3.2∼4.2㎛의 두께로 형성되며, 상기 실시예 1과 같은 방법으로 측정시 4H 이상의 연필경도를 가지며, 가시광선 영역에서 95% 이상의 투과도와 90% 이상의 평탄도를 보였다.As a result, the flattening film formed by curing is formed to have a thickness of 3.2 to 4.2 탆 including RGB, and has a pencil hardness of 4H or more when measured in the same manner as in Example 1, and has a transmittance of 95% or more and a 90% or more in the visible light region. Flatness was shown.
실시예 10Example 10
상기 실시예 4와 동일한 방법으로 평탄화막을 제조하되, 다만 보조 경화제로 페놀기가 있는 단량체 대신 페놀기가 있는 폴리머인 니폰소다사의 폴리하이드록시스티렌을 사용하였다. A flattening film was prepared in the same manner as in Example 4 except that polyhydroxystyrene of Nippon Soda Co., Ltd., a polymer having a phenol group instead of a monomer having a phenol group, was used as an auxiliary curing agent.
그 결과 경화되어 형성된 평탄화막은 R.G.B를 포함하여 3.2∼4.2㎛의 두께로 형성되며, 상기 실시예 1과 같은 방법으로 측정시 4H 이상의 연필경도를 가지며, 가시광선 영역에서 95% 이상의 투과도와 90% 이상의 평탄도를 보였다.As a result, the flattening film formed by curing is formed to have a thickness of 3.2 to 4.2 탆 including RGB, and has a pencil hardness of 4H or more when measured in the same manner as in Example 1, and has a transmittance of 95% or more and a 90% or more in the visible light region. Flatness was shown.
비교예 1Comparative Example 1
상기 실시예 1과 동일한 방법으로 평탄화막을 제조하되, 다만 보조경화제로서 페놀기가 있는 단량체를 넣지 않고 박막 조성물을 조제한 다음 경화시켜 평탄화막을 형성하였다. A flattening film was prepared in the same manner as in Example 1, except that a thin film composition was prepared without adding a monomer having a phenol group as an auxiliary curing agent, and then cured to form a flattening film.
그 결과 경화되어 형성된 평탄화막은 3.2∼4.2㎛의 두께로 형성되며, 상기 실시예 1과 같은 방법으로 측정시 4H이상의 연필 경도를 가지며, 가시광선 영역에서 95% 이상의 투과도를 보이나, 평탄도에 있어서 80% 정도로서 실시예 1에 비해 평탄도가 낮아지는 결과를 보였다. As a result, the flattening film formed by curing is formed to a thickness of 3.2 to 4.2 탆, and has a pencil hardness of 4H or more when measured in the same manner as in Example 1, and shows a transmittance of 95% or more in the visible region, but has a flatness of 80 As a result, the degree of flatness was lowered as compared to Example 1.
비교예 2Comparative Example 2
상기 실시예 3과 동일한 방법으로 평탄화막을 제조하되, 다만 보조경화제로서 페놀기가 있는 단량체를 넣지 않고 박막 조성물을 조제한 다음 경화시켜 평탄화막을 형성하였다. A flattening film was manufactured in the same manner as in Example 3, except that a thin film composition was prepared without adding a monomer having a phenol group as an auxiliary curing agent, and then cured to form a flattening film.
그 결과 경화되어 형성된 평탄화막은 3.2∼4.2㎛의 두께로 형성되며, 상기 실시예 1과 같은 방법으로 측정시 4H이상의 연필 경도를 가지며, 가시광선 영역에서 95% 이상의 투과도를 보이나, 평탄도에 있어서 80% 정도로서 실시예 3에 비해 평탄도가 낮아지는 결과를 보였다. As a result, the flattening film formed by curing is formed to a thickness of 3.2 to 4.2 탆, and has a pencil hardness of 4H or more when measured in the same manner as in Example 1, and shows a transmittance of 95% or more in the visible region, but has a flatness of 80 As a result, the flatness was lowered as compared to Example 3.
비교예 3Comparative Example 3
상기 실시예 4와 동일한 방법으로 평탄화막을 제조하되, 다만 보조경화제로서 페놀기가 있는 단량체를 넣지 않고 박막 조성물을 조제한 다음 경화시켜 평탄화막을 형성하였다. A flattening film was prepared in the same manner as in Example 4, except that a thin film composition was prepared without adding a monomer having a phenol group as an auxiliary curing agent, and then cured to form a flattening film.
그 결과 경화되어 형성된 평탄화막은 3.2∼4.2㎛의 두께로 형성되며, 상기 실시예 1과 같은 방법으로 측정시 4H이상의 연필 경도를 가지며, 가시광선 영역에서 95% 이상의 투과도를 보이나, 평탄도에 있어서 80% 정도로서 실시예 4에 비해 평탄도가 낮아지는 결과를 보였다. As a result, the flattening film formed by curing is formed to a thickness of 3.2 to 4.2 탆, and has a pencil hardness of 4H or more when measured in the same manner as in Example 1, and shows a transmittance of 95% or more in the visible region, but has a flatness of 80 As a result, the flatness was lowered as compared with Example 4.
실시예 11 내지 12 및 비교예 4 내지 6Examples 11-12 and Comparative Examples 4-6
본 예들은 혼합용매 중 알킬 카비톨의 함량이 미치는 영향을 살피보기 위한 것으로서, 상기 실시예 1의 조성에 따르되 다만 다음과 같이 혼합용매의 조성비를 변경하면서 박막 형성시 균일성과 휘발성, 얼룩 등을 조사하여 그 결과를 다음 표 1에 나타내었다.These examples are to examine the effect of the content of the alkyl carbitol in the mixed solvent, according to the composition of Example 1, but investigated the uniformity, volatility, stains, etc. when forming a thin film while changing the composition ratio of the mixed solvent as follows The results are shown in Table 1 below.
상기 표 1의 결과로부터, 에틸 카비톨의 혼합비에 따라서 균일성, 휘발성 및 얼룩의 정도가 차이나는 것을 알 수 있으며, 바람직한 에틸 카비톨의 혼합비는 전체 혼합용매 중 10 내지 50중량%임을 알 수 있다. From the results of Table 1, it can be seen that the degree of uniformity, volatility, and staining vary according to the mixing ratio of ethyl carbitol, and the preferable mixing ratio of ethyl carbitol is 10 to 50% by weight of the total mixed solvent. .
이상에서 상세히 설명한 바와 같이, 본 발명에 따라 주쇄에 올레핀 유도체인 단량체와 하이드록시알킬기, 하이드록시기, 글리시딜기 또는 알킬기 중에서 선택된 기능기를 가진 아크릴 또는 메타아크릴 단량체를 포함하고, 측쇄에는 하이드록시기 또는 에폭시기 등과 같은 경화가 가능한 관능기를 포함하는 중합체에 필요에 따라 경화용 촉매나 보조경화제를 첨가하고, 보관안정제나 계면활성제 등의 첨가제와 알킬 카비톨을 일정량 혼합한 용매를 포함하는 조성물을 이용하여 형성된 열경화성 평탄화막은 TFT-LCD 칼라필터 제조 시 요구되는 95% 이상의 투명도, 90% 이상의 평탄도, 4H 이상의 경도를 갖고 접착력과 코팅 균일성이 우수하다.As described in detail above, according to the present invention, the monomer includes an olefin derivative monomer and an acrylic or methacryl monomer having a functional group selected from hydroxyalkyl group, hydroxy group, glycidyl group or alkyl group, and in the side chain, a hydroxy group Or a composition comprising a solvent comprising a curing catalyst or a co-curing agent added to a polymer containing a functional group capable of curing, such as an epoxy group or the like, and a predetermined amount of an additive such as a storage stabilizer or a surfactant and an alkyl carbitol. The formed thermosetting flattening film has a transparency of 95% or more, a flatness of 90% or more, a hardness of 4H or more, and excellent adhesion and coating uniformity, which are required for manufacturing a TFT-LCD color filter.
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