JP7480938B2 - 粘着剤及び液晶セル - Google Patents
粘着剤及び液晶セル Download PDFInfo
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- JP7480938B2 JP7480938B2 JP2022574207A JP2022574207A JP7480938B2 JP 7480938 B2 JP7480938 B2 JP 7480938B2 JP 2022574207 A JP2022574207 A JP 2022574207A JP 2022574207 A JP2022574207 A JP 2022574207A JP 7480938 B2 JP7480938 B2 JP 7480938B2
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
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- C09K19/58—Dopants or charge transfer agents
- C09K19/586—Optically active dopants; chiral dopants
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- C—CHEMISTRY; METALLURGY
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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- C—CHEMISTRY; METALLURGY
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- C—CHEMISTRY; METALLURGY
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
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- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
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- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1339—Gaskets; Spacers; Sealing of cells
- G02F1/13398—Spacer materials; Spacer properties
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2202/00—Materials and properties
- G02F2202/28—Adhesive materials or arrangements
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- Spectroscopy & Molecular Physics (AREA)
- Liquid Crystal (AREA)
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Description
G(%)=B/A×100
粘着剤の貯蔵弾性率は、TA社のARES G2、Rheometerを用いて測定した。実施例及び比較例に記載されたように、フッ素離型フィルム上に粘着剤層を形成した後、フッ素離型フィルムを剥離して粘着剤層を得る。横×縦の面積が5mm×5mmの粘着剤層を1000μm厚さで積層した後、厚さ8mmのAl plate上に載置して貯蔵弾性率を測定した。25℃の温度及び6rad/sec(約1Hz)のfrequency sweep条件で貯蔵弾性率値を記録した。
実施例及び比較例に記載されたように、フッ素離型フィルム上に粘着剤層を形成した後、フッ素離型フィルムを剥離して粘着剤層を得る。粘着剤層を得た後、すぐに常温25℃で粘着剤の初期質量(g)Aを測定した。また、粘着剤層を得た後、粘着剤層を60℃で24時間トルエン溶媒に浸漬した後、乾燥オーブンを用いて150℃で30分間乾燥した後、不溶解分の質量(g)Bを測定した。ゲル分率は、下記式1のように計算した。
B/A×100
実施例及び比較例で製造した液晶セルの下部基板の一面に下部偏光子を貼り付け、液晶セルの上部基板の一面に上部偏光子を貼り付けた。上部偏光子と下部偏光子は、すべて単体透過度が約45%であり、OCA(LGC社、V310)を介して液晶セルに取り付けた。前記サンプルにおいて下部偏光子の吸収軸は下部基板の配向方向(ラビング方向)と平行であり、上部偏光子は、下部偏光子と吸収軸が約90度をなす。
上部基板の作製
OCAタイプの粘着性樹脂(JP3700,ShinEtsu社)を固形分の濃度が25wt%となるようにトルエン溶媒に混合し、前記粘着性樹脂100重量部に対して白金触媒(CAT-PL-56,ShinEtsu社)1重量部を添加して粘着剤組成物を製造した。
上部基板で使用したものと同じPET-ITOフィルムのITO層上にアクリル系樹脂組成物(商品名:KAD-03、メーカー:ミニュータテック)をコーティングした後、フォトリソグラフィ方式で四角形状にパターニングすることにより、隔壁形状のスペーサを形成した。隔壁形状の高さは8μmであり、ピッチ(四角形の対向する2面の間隔)は350μmであり、線幅は15μmである。次に、スペーサ上に垂直配向膜(5661LB3、Nissan社)を約300nmでコーティングした後、ラビング布でラビング処理して下部基板を製造した。
上部基板からフッ素離型フィルムを剥離した。下部基板の配向膜上に液晶組成物をコーティングした後、上部基板にラミネーションして液晶セルを合着した。前記液晶組成物は、屈折率異方性(Δn)が0.094であり、負の誘電率異方性を有する液晶化合物(SHN-7002XX T12、JNC社)とカイラル添加剤(S811、Merck)の混合物である。製造された液晶セルは、セルギャップが8μmのReverse TNモード液晶セルであり、カイラルピッチは、20μmである。
実施例1で粘着剤の硬化条件を140℃温度及び3分に変更したことを除いては、実施例1と同様に液晶セルを作製した。
実施例1で粘着剤の硬化条件を140℃温度及び1分に変更したことを除いては、実施例1と同様に液晶セルを作製した。
実施例1で粘着剤の硬化条件を130℃温度及び3分に変更したことを除いては、実施例1と同様に液晶セルを作製した。
201:下部基材フィルム
102:粘着剤層
202:下部配向膜
103:上部電極層
203:下部電極層
S:スペーサ
300:液晶層
Claims (14)
- 25℃温度及び6rad/sec周波数における貯蔵弾性率が700kPa以上であり、下記式1で定義されるゲル分率が35%以上である、粘着剤であって、
[式1]
G(%)=B/A×100
式1において、Aは前記粘着剤の初期質量(g)であり、Bは前記粘着剤を60℃で24時間溶媒に浸漬した後、150℃で30分間乾燥した後の、不溶解分の質量(g)であり、
付加硬化型シリコーン系粘着剤である、粘着剤。 - 前記粘着剤の25℃温度及び6rad/sec周波数における貯蔵弾性率は、700kPa~2000kPaの範囲内である、請求項1に記載の粘着剤。
- 前記粘着剤のゲル分率は、35%~50%の範囲内である、請求項1または2に記載の粘着剤。
- 前記粘着剤は、液晶配向性粘着剤である、請求項1から3のいずれか一項に記載の粘着剤。
- 上部基材フィルム及び上部基材フィルムの一面に形成された請求項1から4のいずれか一項に記載の粘着剤の層を含む上部基板、下部基材フィルム及び下部基材フィルムの一面に形成されたスペーサを含む下部基板、及び前記上部基板と前記下部基板の間に液晶層を含む、液晶セル。
- 前記上部基材フィルム及び前記下部基材フィルムは、それぞれポリマーフィルムである、請求項5に記載の液晶セル。
- 前記上部基板の前記粘着剤の層と前記下部基板の前記スペーサが付着した状態で存在する、請求項5または6に記載の液晶セル。
- 前記下部基板は、前記スペーサ上に形成された下部配向膜をさらに含む、請求項5から7のいずれか一項に記載の液晶セル。
- 前記上部基板は、前記上部基材フィルム上に形成された上部電極層をさらに含み、前記下部基板は、前記下部基材フィルム上に形成された下部電極層をさらに含む、請求項5から8のいずれか一項に記載の液晶セル。
- 前記スペーサは、硬化性樹脂を含む、請求項5から9のいずれか一項に記載の液晶セル。
- 前記スペーサは、隔壁形状を有する、請求項5から10のいずれか一項に記載の液晶セル。
- 前記スペーサの線幅は、5μm~50μmの範囲内であり、前記スペーサの高さは、3μm~20μmの範囲内である、請求項5から11のいずれか一項に記載の液晶セル。
- 前記上部基板と前記下部基板は前記スペーサによって間隔を維持し、前記上部基板と前記下部基板の間に前記スペーサが存在しない領域に前記液晶層が存在する、請求項5から12のいずれか一項に記載の液晶セル。
- 請求項5から13のいずれか一項に記載の液晶セルを含む、サンルーフ。
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