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Composition, optical film including the composition, and method of producing the optical film

一种组合物、光学膜的技术，应用在光学膜领域，能够解决温度困难等问题

Active Publication Date: 2017-02-01
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In principle, if the polymerization is carried out at a temperature satisfying the above temperature conditions, a defect-free and homogeneous optical film can be obtained, but especially in the case of polymerization using a photopolymerization initiator, there is heat generation from the light source and polymerization heat, Therefore, it is obviously difficult to control the temperature during polymerization in the desired temperature range

Method used

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  • Composition, optical film including the composition, and method of producing the optical film
  • Composition, optical film including the composition, and method of producing the optical film
  • Composition, optical film including the composition, and method of producing the optical film

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Embodiment approach 1

[0068] [Embodiment 1: Composition]

[0069] The present invention is a composition containing a smectic liquid crystal compound having a 1,4-cyclohexyl group, wherein the smectic liquid crystal compound having a 1,4-cyclohexyl group contains a smectic liquid crystal compound having a trans-1,4-cyclohexyl group ( Hereinafter, it may be referred to as "trans-isomer"), and a smectic liquid crystal compound having a cis-1,4-cyclohexyl group (hereinafter, may be referred to as "cis-isomer"). The content of the cis-isomer is 0.1 to 10 parts by mass relative to 100 parts by mass of the trans-isomer. Preferably it is 0.3 mass part or more, More preferably, it is 0.5 mass part or more, More preferably, it is 0.7 mass part or more, Still more preferably, it is 1 mass part or more. Moreover, it is preferably 7 parts by mass or less, and more preferably 5 parts by mass or less. By making the content of the cis-isomer 10 parts by mass or less relative to 100 parts by mass of the trans-is...

Embodiment approach 2

[0210] [Embodiment 2: Optical film]

[0211] The optical film of the present invention is formed from a composition containing a smectic liquid crystal compound having a 1,4-cyclohexyl group or the liquid crystal composition described above. That is, this invention may be an optical film containing the said composition containing the said liquid crystal composition, or the said liquid crystal composition. In addition, when the above-mentioned smectic liquid crystal compound contained in the composition of the present invention or constituting the above-mentioned liquid crystal composition and the geometric isomer of the smectic liquid crystal compound have a polymerizable group, the optical film of the present invention may contain An optical film of a polymer of the smectic liquid crystal compound and a polymer of the geometric isomer of the smectic liquid crystal compound.

[0212] The optical film can be obtained by curing a composition or a liquid crystal composition that...

Embodiment approach 3

[0216] [Embodiment 3: Manufacturing method of optical film]

[0217] The present invention may be a method for producing an optical film including the following steps (1) to (3).

[0218] (1) The process of coating the composition of the present invention on a substrate;

[0219] (2) The process of heating the composition coated on the substrate;

[0220] (3) The process of cooling the heated said composition to 30 degreeC or less so that a smectic liquid crystal orientation may be performed.

[0221] In the step (1), it is preferable to adjust the viscosity (fluidity) of the composition by, for example, dissolving the composition in an organic solvent before coating the composition of the present invention on the resin substrate. By adjusting the viscosity of the composition, the composition can be uniformly coated on the resin substrate, and the unevenness in the thickness of the resulting optical film can be reduced.

[0222] In the step (1), the method of applying the c...

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Abstract

The present invention provides a composition containing a smectic liquid crystal compound which can be used for production of a homogeneous optical film at a temperature around room temperature, particularly a composition containing a smectic liquid crystal compound having a 1,4-cyclohexyl group, wherein the smectic liquid crystal compound having the 1,4-cyclohexyl group contains (i) 100 parts by mass of a smectic liquid crystal compound having a trans-1,4-cyclohexyl group and (ii) 0.1-10 parts by mass of a smectic liquid crystal compound having a cis-1,4-cyclohexyl group.

Description

technical field [0001] The present invention relates to a composition, an optical film comprising the composition, and a method for producing the optical film. In more detail, it is related with the manufacturing method of the composition which is a liquid crystal material applicable to an optical film, the optical film containing a composition, and an optical film. Background technique [0002] In recent years, as liquid crystal materials applicable to optical films such as polarizing plates and retardation plates used in flat panel displays (FPDs), smectic liquid crystals exhibiting a highly ordered (higher order) smectic liquid crystal phase containing a structure derived from cycloalkane polymerizable liquid crystal compounds have attracted attention. [0003] On the other hand, in order to make the polymerizable liquid crystal compound (including the composition containing the liquid crystal compound) into an optical film, it is necessary to form a highly ordered smect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/04G02B5/30G02F1/1335
CPCC09K19/04G02B5/3016G02F1/133528C09K19/02C09K19/3068C09K19/3086C09K19/3833C09K19/60C09K19/603C09K2019/0448C09K2219/03C09D7/41C09K19/601C09K19/38C08J5/18C09K19/3852C09K19/606G02F1/1334C08K5/0041C08K5/235C09D135/02
Inventor 幡中伸行大川春树
Owner SUMITOMO CHEM CO LTD
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