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Thermosetting resin composition and vertical alignment retardation film
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A resin composition, thermosetting technology, applied in the direction of instruments, polarizing elements, optical elements, etc., can solve the problems of not showing polarizers, easy to cloudy, unstable orientation of liquid crystal, etc., to achieve excellent surface viscosity, white Less turbidity and excellent transparency
Active Publication Date: 2021-06-25
NISSAN CHEM IND LTD
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[0010] 5) The relationship between the retardation value in the thickness direction of the protective film of the polarizing plate and the retardation value of the +A plate and the +C plate is not shown (TAC, COP, PNB)
[0015] As a means to solve such a problem, the development of a new liquid crystal material that can be vertically aligned on a substrate without using a vertical alignment film has been carried out. For example, Patent Documents 4 to 6 disclose as such a liquid crystal material A side chain type liquid crystal polymer composed of a monomer unit (a) containing a liquid crystal segment side chain and a monomer unit (b) containing a non-liquid crystal segment side chain, but the orientation direction of the liquid crystal of the polymer is not Stable, so there is a problem that it is easy to become cloudy
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[0192] The following examples and comparative examples are given to describe the present invention more specifically, but the present invention is not limited to the following examples. In addition, each measurement apparatus used in the Example is as follows.
[0193] [Measurement of average molecular weight]
[0194] Device: Prominence, a high-speed liquid chromatography device manufactured by Shimadzu Corporation
[0201] Device: Micrometer MEQ-30 manufactured by Mitutoyo Corporation
[0202] [Evaluation of Rth, Δn]
[0203] Device: Axoscan manufactured by Axometrics
[0204] Rth: Retardation value in the thickness direction of the vertical alignment liquid crystal layer
[0205] Rth={(Nx+Ny) / 2-Nz}×d[nm]
[0206] R...
Synthetic example 1
[0228] [Synthesis Example 1] Synthesis of Polymer P1 (Component A)
[0229] 7.0 g of 6Be synthesized by the method described in Synthesis Example 3 of International Publication No. 2013 / 133078, 2.0 g of LAA (manufactured by Tokyo Chemical Industry Co., Ltd.), 1.0 g of HEMA (manufactured by Tokyo Chemical Industry Co., Ltd.), as a polymerization catalyst 0.17 g of AIBN (manufactured by Wako Pure Chemical Industries, Ltd.) was dissolved in CH18.9 g, and it was made to react at 75 degreeC for 16 hours, and the acrylic-type copolymer solution P1 (solid content concentration 35 mass %) was obtained. The number average molecular weight (hereinafter referred to as Mn.) of the obtained acrylic copolymer was 16,500, and the weight average molecular weight (hereinafter referred to as Mw.) was 35,800.
Synthetic example 2
[0230] [Synthesis Example 2] Synthesis of Polymer P2 (Component A)
[0231] 6Be6.5g, LAA2.5g, HEMA1.5g, and AIBN0.17g were melt|dissolved in CH18.9g, it was made to react at 75 degreeC for 16 hours, and the acrylic-type copolymer solution P2 (solid content concentration 35 mass %) was obtained. Mn of the obtained acrylic copolymer was 15,300, and Mw was 33,200.
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Abstract
For example, a polymer containing (A) a liquid crystallineside chain represented by the following formula (1), such as a vertical alignment group represented by the following formula (2) and a thermally crosslinkable group, (B) a crosslinkable The thermosetting resin composition of the coupling agent and (C) solvent enables vertical alignment without using a vertical alignment film, and provides a thermosetting film and a vertical alignment retardation film with cloudiness (transparency) and improved surface tackiness. (where, Y 1 ~Y 4 Indicates a single key, etc., Y 5 Represents a benzene ring, etc., m represents an integer from 0 to 4, Y 6 Represents a hydrogen atom, an alkyl group with 1 to 18 carbon atoms, etc., Y 2 ~Y 6 The total number of carbon atoms of the substituents shown is 6-30. X represents a COO group or an OCO group, R represents a fluorine atom, a cyano group, an alkyl group with 1 to 6 carbon atoms or an alkoxy group with 1 to 6 carbon atoms, n represents an integer from 1 to 10, and o and p represent 1 or an integer of 2. )
Description
technical field [0001] The present invention relates to a thermosetting resin composition and a vertical alignment retardation film, and more specifically, relates to improving a liquid crystal display (liquid crystal display; LCD), (specifically filled with positive dielectricanisotropy It can be used to make +C plate (positive C plate) based on the viewing angle characteristics of IPS liquid crystaldisplay device (In-plane Switching LCD (IPS-LCD); in-plane orientation switching LCD)) of liquid crystal (△ε>0). A thermosetting resin composition and a vertically oriented retardation film. Background technique [0002] The characteristic of IPS-LCD is that since there is no inclination in the vertical direction of the liquid crystal molecules, there is little change in luminance / color due to the viewing angle, but the disadvantages include difficulty in improving contrast, luminance, and response speed. [0003] For example, as disclosed in Patent Document 1, for the IPS...
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Application Information
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