JPWO2019181879A5 - - Google Patents

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JPWO2019181879A5
JPWO2019181879A5 JP2020507804A JP2020507804A JPWO2019181879A5 JP WO2019181879 A5 JPWO2019181879 A5 JP WO2019181879A5 JP 2020507804 A JP2020507804 A JP 2020507804A JP 2020507804 A JP2020507804 A JP 2020507804A JP WO2019181879 A5 JPWO2019181879 A5 JP WO2019181879A5
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liquid crystal
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下記の(A)成分、(B)成分、及び有機溶媒を含有することを特徴とする液晶配向剤。
(A)成分:ポリイミド前駆体、該ポリイミド前駆体のイミド化重合体、及び100~300℃の温度範囲で液晶性を発現する感光性の側鎖型アクリル重合体からなる群から選ばれる少なくとも1種の重合体
(B)成分:下記式(1)で表される化合物
Figure 2019181879000001
(式(1)中、Q及びQは下記式(Q1-1)及び単結合から選ばれる一種であり、Q及びQの少なくとも1つは式(Q1-1)である。q1及びq2は、それぞれ独立に、0又は1である。R及びRは、それぞれ独立に、エポキシ部位を有する基又は水素原子であり、R及びRの少なくとも1つはエポキシ部位を有する基である。)
Figure 2019181879000002
(式(1)中、Rは水素原子、又は一価の有機基である。
A liquid crystal alignment agent containing the following component (A), component (B), and an organic solvent.
Component (A): At least one selected from the group consisting of a polyimide precursor, an imidized polymer of the polyimide precursor, and a photosensitive side chain acrylic polymer that exhibits liquid crystallinity in a temperature range of 100 to 300 ° C. Species polymer (B) component: Compound represented by the following formula (1)
Figure 2019181879000001
(In the formula (1), Q 1 and Q 2 are one selected from the following formula (Q1-1) and a single bond, and at least one of Q 1 and Q 2 is the formula (Q1-1). And q2 are independently 0 or 1, respectively. R 2 and R 3 are independent groups or hydrogen atoms having epoxy moieties, and at least one of R 2 and R 3 has an epoxy moiety. Is the basis.)
Figure 2019181879000002
(In formula (1), R 1 is a hydrogen atom or a monovalent organic group . )
前記(A)成分であるポリイミド前駆体が、下記式(A1)で表される構造単位を有する、請求項1に記載の液晶配向剤。
Figure 2019181879000003
(式(A1)中、Xは4価の有機基である。Yは2価の有機基である。Rは、水素原子、又は炭素数1~5のアルキル基であり、A及びAは、それぞれ独立して、水素原子、置換基を有してもよい炭素数1~10のアルキル基、置換基を有してもよい炭素数2~10のアルケニル基、又は置換基を有してもよい炭素数2~10のアルキニル基である。)
The liquid crystal alignment agent according to claim 1, wherein the polyimide precursor as the component (A) has a structural unit represented by the following formula (A1).
Figure 2019181879000003
(In the formula (A1), X 1 is a tetravalent organic group. Y 1 is a divalent organic group. R 1 is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and A 1 And A 2 are independently hydrogen atoms, an alkyl group having 1 to 10 carbon atoms which may have a substituent, an alkenyl group having 2 to 10 carbon atoms which may have a substituent, or a substituent. It is an alkynyl group having 2 to 10 carbon atoms which may have.)
前記式(A1)中、Yが、下記式で表される構造(5)及び式(6)で表される構造から選ばれる少なくとも1種である請求項2に記載の液晶配向剤。
Figure 2019181879000004
(式(5)中、R12は単結合又は炭素数1~30の2価の有機基である。R13は水素原子、ハロゲン原子又は炭素数1~30の1価の有機基である。aは1~4の整数である。aが2以上の場合、2つ以上のR12及び2つ以上のR 13は同一でも異なっていてもよい。式(6)中、R14は単結合、-O-、-S-、-NR15-、アミド結合、エステル結合、ウレア結合、又は炭素数1~40の2価の有機基である。)
The liquid crystal alignment agent according to claim 2, wherein in the formula (A1), Y 1 is at least one selected from the structure represented by the following formula (5) and the structure represented by the formula (6).
Figure 2019181879000004
(In the formula (5), R 12 is a single bond or a divalent organic group having 1 to 30 carbon atoms. R 13 is a hydrogen atom, a halogen atom or a monovalent organic group having 1 to 30 carbon atoms. a is an integer of 1 to 4. When a is 2 or more, two or more R 12 and two or more R 13 may be the same or different. In equation (6), R 14 is a single bond. , -O-, -S-, -NR 15- , amide bond, ester bond, urea bond, or divalent organic group having 1 to 40 carbon atoms.)
前記(A)成分である100~300℃の温度範囲で液晶性を発現する感光性の側鎖型アクリル重合体が、下記式(i)~(v)の少なくとも1種からなる側鎖構造を有する請求項1に記載の液晶配向剤。
Figure 2019181879000005
(式(i)~(v)中、Arは、ベンゼン環、ナフタレン環、ピロール環、フラン環、チオフェン環又はピリジン環から、2個の水素原子を取り去った2価の置換基である。
Ar及びArは、それぞれ独立に、ベンゼン環、ナフタレン環、ピロール環、フラン環、チオフェン環又はピリジン環から、2個の水素原子を取り去った2価の置換基である。q1とq2は、一方は1であり、もう一方は0である。Ar及びArは、それぞれ独立に、ベンゼン環、ナフタレン環、ピロール環、フラン環、チオフェン環又はピリジン環から、2個の水素原子を取り去った2価の置換基を表す。Y及びYは、それぞれ独立に、-CH=CH-、-CH=N-、-N=CH-又は-C≡C-である。S、S及びSは、それぞれ独立に、単結合、炭素数1~18の直鎖若しくは分岐状のアルキレン基、炭素数5~8のシクロアルキレン基、フェニレン基、ビフェニレン基、又はそれらの2~10の組み合わせからなる2価の置換基を表す。なお、前記2価の置換基は、単結合、エーテル結合、エステル結合、アミド結合、ウレア結合、ウレタン結合、アミノ結合、カルボニル結合を介して、それぞれ複数個が連結してなる構造であってもよい。R11は、水素原子、ヒドロキシ基、メルカプト基、アミノ基、炭素数1~10のアルキル基、炭素数1~10のアルコキシ基、炭素数1~8のアルキルアミノ基、又は炭素数2~16のジアルキルアミノ基である。)
The photosensitive side-chain acrylic polymer that exhibits liquid crystallinity in the temperature range of 100 to 300 ° C., which is the component (A), has a side-chain structure consisting of at least one of the following formulas (i) to (v). The liquid crystal alignment agent according to claim 1.
Figure 2019181879000005
In formulas (i) to (v), Ar 1 is a divalent substituent obtained by removing two hydrogen atoms from a benzene ring, a naphthalene ring, a pyrrole ring, a furan ring, a thiophene ring or a pyridine ring.
Ar 2 and Ar 3 are divalent substituents obtained by removing two hydrogen atoms from a benzene ring, a naphthalene ring, a pyrrole ring, a furan ring, a thiophene ring or a pyridine ring, respectively. One of q1 and q2 is 1 and the other is 0. Ar 4 and Ar 5 each independently represent a divalent substituent obtained by removing two hydrogen atoms from a benzene ring, a naphthalene ring, a pyrrole ring, a furan ring, a thiophene ring or a pyridine ring. Y 1 and Y 2 are independently -CH = CH-, -CH = N-, -N = CH- or -C≡C-, respectively. S 1 , S 2 and S 3 are independently single-bonded, linear or branched alkylene groups having 1 to 18 carbon atoms, cycloalkylene groups having 5 to 8 carbon atoms, phenylene groups, biphenylene groups, or them. Represents a divalent substituent consisting of a combination of 2 to 10. Even if the divalent substituent has a structure in which a plurality of each is linked via a single bond, an ether bond, an ester bond, an amide bond, a urea bond, a urethane bond, an amino bond, and a carbonyl bond. good. R 11 is a hydrogen atom, a hydroxy group, a mercapto group, an amino group, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkylamino group having 1 to 8 carbon atoms, or an alkylamino group having 2 to 16 carbon atoms. It is a dialkylamino group of. )
前記(B)成分で表される化合物が、下記式(B-1)~式(B-6)から選ばれる少なくとも1種である請求項1~4のいずれか1項に記載の液晶配向剤。
(B-1):前記式(1)において、q1及びq2が0であり、Qが(Q1-1)であり、R及びRがエポキシ基を有する基である化合物、
(B-2):前記式(1)において、q1及びq2が0であり、Qが(Q1-1)であり、Rが水素原子であり、Rがエポキシ基を有する基である化合物、
(B-3):前記式(1)において、q1及びq2が1であり、Qが単結合又は(Q1-1)であり、Qが(Q1-1)であり、R及びRがエポキシ基を有する基である化合物、
(B-4):前記式(1)において、q1及びq2が1であり、Qが単結合又は(Q1-1)であり、Qが(Q1-1)であり、Rが水素原子であり、Rがエポキシ基を有する基である化合物。
(B-5):前記式(1)において、q1及びq2が1であり、Qが(Q1-1)であり、Qが単結合であり、R及びRがエポキシ基を有する基である化合物、
(B-6):前記式(1)において、q1及びq2が1であり、Qが(Q1-1)であり、Qが単結合であり、Rが水素原子であり、Rがエポキシ基を有する基である化合物。
The liquid crystal alignment agent according to any one of claims 1 to 4, wherein the compound represented by the component (B) is at least one selected from the following formulas (B-1) to (B-6). ..
(B-1): A compound in which q1 and q2 are 0, Q1 is (Q1-1), and R2 and R3 are groups having an epoxy group in the above formula (1).
(B-2): In the above formula (1), q1 and q2 are 0, Q1 is (Q1-1), R2 is a hydrogen atom , and R3 is a group having an epoxy group. Compound,
(B-3): In the above formula (1), q1 and q2 are 1, Q1 is a single bond or (Q1-1), Q2 is (Q1-1), and R2 and R. A compound in which 3 is a group having an epoxy group,
(B-4): In the above formula (1), q1 and q2 are 1, Q1 is a single bond or (Q1-1), Q2 is (Q1-1), and R2 is hydrogen. A compound that is an atom and R 3 is a group having an epoxy group.
(B-5): In the above formula (1), q1 and q2 are 1, Q1 is (Q1-1), Q2 is a single bond , and R2 and R3 have an epoxy group. The underlying compound,
(B-6): In the above formula (1), q1 and q2 are 1, Q1 is (Q1-1), Q2 is a single bond, R2 is a hydrogen atom , and R3. Is a compound that is a group having an epoxy group.
前記(B)成分の化合物が、下記式Q1-1-1~式Q1-1-7から選ばれる少なくとも1種である請求項1~5のいずれか1項に記載の液晶配向剤。
Figure 2019181879000006
The liquid crystal alignment agent according to any one of claims 1 to 5, wherein the compound of the component (B) is at least one selected from the following formulas Q1-1-1 to Q1-1-7.
Figure 2019181879000006
前記有機溶媒が、N,N-ジメチルホルムアミド、N,N-ジメチルアセトアミド、N-メチル-2-ピロリドン、N-エチル-2-ピロリドン、ジメチルスルホキシド、γ-ブチロラクトン、1,3-ジメチル-イミダゾリジノン、メチルエチルケトン、シクロヘキサノン、シクロペンタノン、又は4-ヒドロキシ-4-メチル-2-ペンタノンである請求項1~6のいずれか1項に記載の液晶配向剤。 The organic solvent is N, N-dimethylformamide, N, N-dimethylacetamide, N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, dimethyl sulfoxide, γ-butyrolactone, 1,3-dimethyl-imidazolidi. The liquid crystal alignment agent according to any one of claims 1 to 6, which is non, methyl ethyl ketone, cyclohexanone, cyclopentanone, or 4-hydroxy-4-methyl-2-pentanone. 前記有機溶媒が、液晶配向膜の塗膜性や表面平滑性を向上させる溶媒をさらに含む請求項7に記載の液晶配向剤。 The liquid crystal alignment agent according to claim 7, wherein the organic solvent further contains a solvent that improves the coating film property and the surface smoothness of the liquid crystal alignment film. 前記(A)成分を含む重合体を、液晶配向剤中、1~10質量%含有する請求項1~8のいずれか1項に記載の液晶配向剤。 The liquid crystal alignment agent according to any one of claims 1 to 8, which contains 1 to 10% by mass of the polymer containing the component (A) in the liquid crystal alignment agent. 前記(B)成分を、前記(A)成分に対して0.1~20質量%含有する請求項9に記載の液晶配向剤。 The liquid crystal alignment agent according to claim 9, which contains the component (B) in an amount of 0.1 to 20% by mass with respect to the component (A). 請求項1~10のいずれか1項に記載の液晶配向剤から得られる液晶配向膜。 A liquid crystal alignment film obtained from the liquid crystal alignment agent according to any one of claims 1 to 10. 請求項11に記載の液晶配向膜を具備する液晶表示素子。 A liquid crystal display element comprising the liquid crystal alignment film according to claim 11.
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