JP7103686B2 - 架橋剤化合物、これを含む液晶配向剤組成物、これを用いた液晶配向膜の製造方法、これを用いた液晶配向膜および液晶表示素子 - Google Patents
架橋剤化合物、これを含む液晶配向剤組成物、これを用いた液晶配向膜の製造方法、これを用いた液晶配向膜および液晶表示素子 Download PDFInfo
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- JP7103686B2 JP7103686B2 JP2020545703A JP2020545703A JP7103686B2 JP 7103686 B2 JP7103686 B2 JP 7103686B2 JP 2020545703 A JP2020545703 A JP 2020545703A JP 2020545703 A JP2020545703 A JP 2020545703A JP 7103686 B2 JP7103686 B2 JP 7103686B2
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- 125000004432 carbon atom Chemical group C* 0.000 claims description 97
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- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 3
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- AVQQQNCBBIEMEU-UHFFFAOYSA-N 1,1,3,3-tetramethylurea Chemical compound CN(C)C(=O)N(C)C AVQQQNCBBIEMEU-UHFFFAOYSA-N 0.000 description 2
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- 125000000753 cycloalkyl group Chemical group 0.000 description 1
- 125000004210 cyclohexylmethyl group Chemical group [H]C([H])(*)C1([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C1([H])[H] 0.000 description 1
- 125000004851 cyclopentylmethyl group Chemical group C1(CCCC1)C* 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 description 1
- ANSXAPJVJOKRDJ-UHFFFAOYSA-N furo[3,4-f][2]benzofuran-1,3,5,7-tetrone Chemical compound C1=C2C(=O)OC(=O)C2=CC2=C1C(=O)OC2=O ANSXAPJVJOKRDJ-UHFFFAOYSA-N 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000004491 isohexyl group Chemical group C(CCC(C)C)* 0.000 description 1
- 125000001972 isopentyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001280 n-hexyl group Chemical group C(CCCCC)* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- MPQXHAGKBWFSNV-UHFFFAOYSA-N oxidophosphanium Chemical group [PH3]=O MPQXHAGKBWFSNV-UHFFFAOYSA-N 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 125000003538 pentan-3-yl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 125000005561 phenanthryl group Chemical group 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001725 pyrenyl group Chemical group 0.000 description 1
- BXEMXLDMNMKWPV-UHFFFAOYSA-N pyridine Chemical group C1=CC=NC=C1.C1=CC=NC=C1 BXEMXLDMNMKWPV-UHFFFAOYSA-N 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 125000003548 sec-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 125000003808 silyl group Chemical group [H][Si]([H])([H])[*] 0.000 description 1
- 239000005361 soda-lime glass Substances 0.000 description 1
- HUAUNKAZQWMVFY-UHFFFAOYSA-M sodium;oxocalcium;hydroxide Chemical compound [OH-].[Na+].[Ca]=O HUAUNKAZQWMVFY-UHFFFAOYSA-M 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 125000000565 sulfonamide group Chemical group 0.000 description 1
- 125000004434 sulfur atom Chemical group 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1075—Partially aromatic polyimides
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- C07F7/0812—Compounds with Si-C or Si-Si linkages comprising at least one atom selected from the elements N, O, halogen, S, Se or Te comprising a heterocyclic ring
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Description
本出願は、2018年11月20日付の韓国特許出願第10-2018-0143861号に基づく優先権の利益を主張し、当該韓国特許出願の文献に開示された全ての内容は本明細書の一部として含まれる。
本発明による架橋剤化合物は、上記化学式1で表される特定の化学構造を有することができる。前記架橋剤化合物の物理/化学的特性は、上述した化学式1の特定構造によるものと考えられる。
[化学式1-1]
一方、発明の一実施形態によれば、上記化学式1で表される架橋剤化合物およびポリアミック酸繰り返し単位、ポリアミック酸エステル繰り返し単位、およびポリイミド繰り返し単位からなる群より選ばれた1種以上を含む液晶配向剤用重合体を含む、液晶配向剤組成物が提供され得る。
[化学式4]
[化学式10]
前記Y1~Y3は、それぞれ独立して、下記化学式11で表される2価の有機基であり、
[化学式11]
前記Y4~Y6は、それぞれ独立して、下記化学式12で表される2価の有機基であり、
[化学式12]
[化学式10-1]
[化学式12-4]
本発明のさらに他の実施形態によれば、前記液晶配向剤組成物を用いた液晶配向膜の製造方法が提供される。前記液晶配向膜の製造方法は、前記液晶配向剤組成物を基板に塗布して塗膜を形成する段階(段階1)と;前記塗膜を乾燥する段階(段階2)と;前記塗膜に光を照射したりラビング処理したりして配向処理する段階(段階3)と;前記配向処理された塗膜を熱処理して硬化する段階(段階4)とを含む、液晶配向膜の製造方法を提供する。
また、本発明のさらに他の実施形態によれば、上述した液晶配向膜の製造方法により製造された液晶配向膜が提供される。具体的には、前記液晶配向膜は、前記一実施形態の液晶配向剤組成物の配向硬化物を含み得る。前記配向硬化物とは、前記一実施形態の液晶配向剤組成物の配向工程および硬化工程を経て得られる物質を意味する。
[数式2]
膜強度=ラビング処理後の液晶配向膜のヘイズ-ラビング処理前の液晶配向膜のヘイズ
また、発明のさらに他の実施形態によれば、上述した液晶配向膜を含む液晶表示素子が提供される。
合成例1:架橋剤A1の合成
MS[M+H]+=433
MS[M+H]+=401
MS[M+H]+=585
MS[M+H]+=917
MS[M+H]+=939
MS[M+H]+=673
前記合成例1の反応物であるN,N,N',N'-Tetrakis(2-hydroxyethyl)adipamideを比較合成例1の架橋剤として使用した。
<実施例>
実施例1:液晶配向剤組成物の製造
下記化学式Aで表されるジアミンDA1 5.0g(13.3mmol)を無水N-メチルピロリドン(NMP)71.27gに完全に溶かした。そして、ice bath下で1,3-ジメチル-シクロブタン-1,2,3,4-テトラカルボン酸二無水物(DMCBDA)2.92g(13.03mmol)を前記溶液に添加し、約16時間常温で攪拌して液晶配向剤用重合体P-1を製造した。GPCにより前記重合体P-1の分子量を確認した結果、数平均分子量(Mn)が15,500g/molであり、重量平均分子量(Mw)が31,000g/molであった。そして、重合体P-1のモノマー構造は、使用したモノマーの当量比によって決まるものであり、分子内のイミド構造の比率が50.5%、アミック酸構造の比率が49.5%であった。
[化学式A]
[化学式B]
下記表1に示すような組成で、前記合成例1で得られた架橋剤A1の代わりに前記合成例2~18で得られた架橋剤A2~架橋剤A18を使用したことを除いて、前記実施例1と同様の方法で、液晶配向剤組成物を製造した。
前記合成例1で得られた架橋剤A1を添加しないことを除いて、前記実施例1と同様の方法で、液晶配向剤組成物を製造した。
前記合成例1で得られた架橋剤A1の代わりに比較合成例1のN,N,N',N'-Tetrakis(2-hydroxyethyl)adipamideを添加したことを除いて、前記実施例1と同様の方法で、液晶配向剤組成物を製造した。
(液晶配向セルの製造)
前記実施例および比較例で製造された液晶配向剤組成物を用いて液晶配向膜および液晶配向セルを製造した。
前記のように製造された液晶セルの上板および下板に、偏光板を互いに垂直となるように取り付けた。この時、下板に取り付けられた偏光板の偏光軸は、液晶セルの配向軸と平行にした。そして、偏光板付き液晶セルを明るさ7,000cd/m2のバックライト上に置き、肉眼で光漏れを観察した。この時、液晶配向膜の配向特性に優れて液晶をよく配列させれば、互いに垂直に取り付けられた上下の偏光板によって光が通過せず、不良なしに暗く観察される。この場合の配向特性を「良好」、液晶の流れ跡や輝点のような光漏れが観察されると「不良」と表2に示す。
前記のように製造された液晶配向セルの上板および下板に、偏光板を互いに垂直となるように取り付けた。前記偏光板付き液晶セルを7,000cd/m2のバックライト上に取り付け、ブラック状態の輝度を輝度明るさ測定装備であるPHOTO RESEARCH社製のPR-788装備を用いて測定した。そして、前記液晶セルを常温で交流電圧5Vで、24時間駆動した。その後、液晶セルの電圧を切った状態で、上述したものと同一にブラック状態の輝度を測定した。液晶セルの駆動前に測定された初期輝度(L0)と駆動後に測定された後の輝度(L1)との間の差を初期輝度(L0)値で割り、100をかけて輝度変動率を計算した。このように計算された輝度変動率は、0%に近いほど配向安定性に優れていることを意味する。このような輝度変化率の測定結果により、以下の基準で残像水準を評価した。AC残像は最少化することが好ましく、測定結果、輝度変動率が10%未満であれば「優秀」、輝度変動率が10%~20%であれば「普通」、輝度変動率が20%を超えれば「不良」と評価し、その結果を下記表2に示す。
上記で得られた液晶配向セルの電気的特性である電圧保持率(VHR)をToyo社製の6254装備を用いて測定した。電圧保持率は1V、1Hz、60℃の苛酷条件下で測定した。電圧保持率は100%が理想的な値であり、測定結果、70%以上であれば「良好」、70%未満であれば「不良」と評価し、下記表2に示す。
前記実施例および比較例の液晶配向剤組成物でそれぞれ使用された架橋剤に対して、前記表1の架橋剤添加量を満たすように溶媒(γ-ブチロラクトン)に添加した後、10秒間攪拌した混合溶液を製造し、混合溶液の透明度を肉眼で確認し、以下の基準をもとに溶解性水準を評価した。
上記で得られた液晶配向膜に対して、前記液晶配向膜表面をsindo engineering社製のrubbing machineを用いて850rpmで回転させながらラビング処理した後、ヘイズメータ(hazemeter)を用いてヘイズ値を測定し、下記数式2のようにラビング処理前のヘイズ値との差を計算して膜強度を評価した。前記ヘイズ変化値が1未満であれば膜強度は優れたものである。
[数式2]
膜強度=ラビング処理後の液晶配向膜のヘイズ-ラビング処理前の液晶配向膜のヘイズ
Claims (13)
- 下記化学式1で表される架橋剤化合物:
[化学式1]
Aは下記化学式2で表される4価の官能基のうちの一つであり、
pは4であり、
nは2または4であり、
L 1 およびL 2 は互いに同一または異なり、それぞれ独立して、炭素数1~10のアルキレン基であり、
Q 1 およびQ 2 は互いに同一または異なり、それぞれ独立して、水素、炭素数1~10のアルキル基、または炭素数6~20のアリール基のうちの一つであり、
Xは14族元素である。
[化学式2]
R1~R6は、それぞれ独立して、水素、または炭素数1~10のアルキル基であり、
Yは直接結合、-O-、-CO-、-S-、-SO-、-SO2-、-CR7R8-、-CONH-、-COO-、-(CH2)b-、-O(CH2)bO-、-COO-(CH2)b-OCO-、フェニレンまたはこれらの組み合わせからなる群より選ばれたいずれか一つであり、
R7およびR8は、それぞれ独立して、水素、炭素数1~10のアルキル基、または炭素数1~10のハロアルキル基であり、bは1~10の整数である。 - 上記化学式1において、
L1およびL2は互いに同一または異なり、それぞれ独立して、炭素数1~10のアルキレン基であり、
Q1およびQ2は互いに同一または異なり、それぞれ独立して、炭素数1~10のアルキル基である、請求項1に記載の架橋剤化合物。 - 上記化学式1において、
XはCまたはSiである、請求項1に記載の架橋剤化合物。 - 下記化学式1で表される架橋剤化合物:
[化学式1]
Aはp価の官能基であり、
pは1~4の整数であり、
nは1~4の整数であり、
L 1 およびL 2 は互いに同一または異なり、それぞれ独立して、炭素数1~10のアルキレン基であり、
Q 1 およびQ 2 は互いに同一または異なり、それぞれ独立して、水素、炭素数1~10のアルキル基、または炭素数6~20のアリール基のうちの一つであり、
Xは14族元素であり、
上記化学式1で表される架橋剤化合物は、下記化学式1-1で表される化合物から下記化学式1-3で表される化合物を含む:
[化学式1-1]
L3~L6は互いに同一または異なり、それぞれ独立して、炭素数1~10のアルキレン基であり、
Q3~Q6は互いに同一または異なり、それぞれ独立して、炭素数1~10のアルキル基または炭素数6~20のアリール基のうちの一つであり、
X1およびX2はそれぞれ独立して、14族元素であり、
[化学式1-2]
L7~L14は互いに同一または異なり、それぞれ独立して、炭素数1~10のアルキレン基であり、
Q7~Q14は互いに同一または異なり、それぞれ独立して、炭素数1~10のアルキル基または炭素数6~20のアリール基のうちの一つであり、
X3~X6は、それぞれ独立して、14族元素であり、
[化学式1-3]
L15~L18は互いに同一または異なり、それぞれ独立して、炭素数1~10のアルキレン基であり、
Q15~Q18は互いに同一または異なり、それぞれ独立して、炭素数1~10のアルキル基または炭素数6~20のアリール基のうちの一つであり、
X7~X8は、それぞれ独立して、14族元素である。 - 下記化学式1で表される架橋剤化合物であって、
[化学式1]
Aはp価の官能基であり、
pは1~4の整数であり、
nは1~4の整数であり、
L 1 およびL 2 は互いに同一または異なり、それぞれ独立して、炭素数1~10のアルキレン基であり、
Q 1 およびQ 2 は互いに同一または異なり、それぞれ独立して、水素、炭素数1~10のアルキル基、または炭素数6~20のアリール基のうちの一つであり、
Xは14族元素である架橋剤化合物;および
ポリアミック酸繰り返し単位、ポリアミック酸エステル繰り返し単位、およびポリイミド繰り返し単位からなる群より選ばれた1種以上を含む液晶配向剤用重合体;を含む、液晶配向剤組成物。 - 前記液晶配向剤用重合体は、下記化学式4で表される繰り返し単位、下記化学式5で表される繰り返し単位および下記化学式6で表される繰り返し単位からなる群より選ばれた1種以上の繰り返し単位を含む第1液晶配向剤用重合体;および
下記化学式7で表される繰り返し単位、下記化学式8で表される繰り返し単位および下記化学式9で表される繰り返し単位からなる群より選ばれた1種以上の繰り返し単位を含む第2液晶配向剤用重合体;を含む、請求項7に記載の液晶配向剤組成物:
[化学式4]
R9およびR10のうちの少なくとも一つは炭素数1~10のアルキル基であり、残りは水素であり、
R11およびR12のうちの少なくとも一つは炭素数1~10のアルキル基であり、残りは水素であり、
X1~X6は、それぞれ独立して、下記化学式10で表される4価の有機基であり、
[化学式10]
R13~R18は、それぞれ独立して、水素、または炭素数1~6のアルキル基であり、
L'は単結合、-O-、-CO-、-COO-、-S-、-SO-、-SO2-、-CR19R20-、-(CH2)z-、-O(CH2)zO-、-COO-(CH2)zOCO-、-CONH-、またはフェニレンの中から選ばれたいずれか一つであり、
前記L'中、R19およびR20は、それぞれ独立して、水素、炭素数1~10のアルキル基または炭素数1~10のハロアルキル基であり、
前記L'中、zは1~10の整数であり、
前記Y1~Y3は、それぞれ独立して、下記化学式11で表される2価の有機基であり、
[化学式11]
Tは上記化学式10で表される4価の有機基であり、
D1およびD2は、それぞれ独立して、炭素数1~20のアルキレン基、炭素数1~10のヘテロアルキレン基、炭素数3~20のシクロアルキレン基、炭素数6~20のアリーレン基または炭素数2~20のヘテロアリーレン基の中から選ばれたいずれか一つであり、
前記Y4~Y6は、それぞれ独立して、下記化学式12で表される2価の有機基であり、
[化学式12]
A'は15族元素であり、
R'は水素、または炭素数1~10のアルキルであり、
aは1~3の整数であり、
Z1~Z4のうちの少なくとも一つは窒素であり、残りは炭素である。 - 上記化学式1で表される架橋剤化合物の含有量は、液晶配向剤組成物全体重量を基準にして1重量%~30重量%である、請求項7または8に記載の液晶配向剤組成物。
- 請求項7から9のいずれか一項に記載の液晶配向剤組成物を基板に塗布して塗膜を形成する段階と;
前記塗膜を乾燥する段階と;
前記塗膜に光を照射したりラビング処理したりして配向処理する段階と;
前記配向処理された塗膜を熱処理して硬化する段階と;を含む、液晶配向膜の製造方法。 - 請求項7から9のいずれか一項に記載の液晶配向剤組成物の配向硬化物を含む、液晶配向膜。
- 請求項12に記載の液晶配向膜を含む、液晶表示素子。
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