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Optical resin material, method for producing the optical resin material, optical resin member containing the material, and polarizing plate containing the same

A technology of optical resin and manufacturing method, applied in the direction of polarizing elements, etc., capable of solving problems such as insufficient offset

Active Publication Date: 2019-02-19
小池康博 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] On the other hand, there is known a method of almost eliminating one of orientation birefringence and photoelastic birefringence by selecting additives to a light-transmitting polymer and their concentration, or by selecting a combination of copolymerization and a composition ratio. , but the cancellation of the other becomes insufficient in the way of canceling one

Method used

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  • Optical resin material, method for producing the optical resin material, optical resin member containing the material, and polarizing plate containing the same
  • Optical resin material, method for producing the optical resin material, optical resin member containing the material, and polarizing plate containing the same
  • Optical resin material, method for producing the optical resin material, optical resin member containing the material, and polarizing plate containing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] (Design of monomer composition ratio)

[0111] In this example, choose figure 1 The 3 monomers shown in are PhMA (1st monomer), BzMA (2nd monomer) and EMI (3rd monomer), and design such that a copolymer is obtained by combining these monomers When , the characteristic birefringence and characteristic temperature coefficient of birefringence of the optical film made from the obtained copolymer are both zero. Specifically, the composition ratios of the above three types of monomers were determined by calculation using the following formulas (iv) to (vi) as described above.

[0112]

[0113]

[0114] 100=W 1 +W 2 +W 3 (vi)

[0115] Specifically, in this example, in order to design a copolymer capable of obtaining an optical thin film having both a characteristic birefringence and a characteristic birefringence temperature coefficient of zero, the above-mentioned simultaneous equations (iv) to (vi) are used to calculate Monomer formulations. When the intrinsi...

Embodiment 2

[0129] In the same manner as in Example 1 except that the mass ratio of the monomers of the copolymer was prepared as MMA / PhMA / BzMA=40 / 27 / 33, the film obtained from the copolymer was obtained at 25°C. The intrinsic birefringence and the intrinsic temperature coefficient of birefringence. As a result, the characteristic birefringence at 25°C is Δn 0 =-0.22×10 -3 , the temperature coefficient of characteristic birefringence is dΔn 0 / dT=0.38×10 -5 ℃ -1 , the thin film formed from the copolymer prepared in this example also showed little change in birefringence even if the temperature was increased, reducing the temperature dependence.

Embodiment 3

[0131] Except that the mass ratio of the monomers of the copolymer was prepared as a copolymer of a 3-component system of MMA / PhMA / EMI=29 / 54 / 17, the same operation was performed as in Example 1, and the monomer composition was designed so that the obtained unit Copolymers were synthesized by bulk composition. In addition, the intrinsic birefringence and the temperature coefficient of intrinsic birefringence at 25° C. were determined for the thin film obtained from the copolymer. Image 6 The results are shown in . As a result, the characteristic birefringence at 25°C is Δn 0 =-0.47×10 -3 , the temperature coefficient of characteristic birefringence is dΔn 0 / dT=-0.12×10 -5 ℃ -1 , the thin film formed from the copolymer prepared in this example also showed little change in birefringence even if the temperature was raised, reducing the temperature dependence.

[0132] (Measurement of temperature dependence of characteristic birefringence of polymers)

[0133] In the prese...

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Abstract

The invention provides an optical resin material with small orientation birefringence or as expected value, a manufacturing method of the material, an optical resin component comprising the material and a polarizer comprising the component. The optical resin material comprises a more than 2 of component number z of composite component system, the component number z is defined under the counting condition of making the component number containing an arity x (x>=1) of an co-polymer; in a state that the temperature of a uniaxial stretched film is periodically controlled in a range of 15 DEG C to 70 DEG C, the uniaxial stretched film formed by the composite component system can separately measure intrinsic birefringence [delta]n0 at different temperatures, the measured result serves as a variation of every 1 DEG C of intrinsic birefringence, so that an determined absolute value of the intrinsic birefringence temperature coefficient under temperature of 15 DEG C to 70 DEG C is below a range of 1.0*10-5 (DEG C -1), and the temperature dependency of the intrinsic birefringence is reduced.

Description

technical field [0001] In particular, the present invention relates to an optical resin material in which the temperature dependence of the characteristic birefringence of a polymer is suppressed (that is, the characteristic birefringence does not vary with the measurement temperature), and the characteristic birefringence is adjusted to be almost zero or a desired value, and the optical resin material. A manufacturing method, an optical resin member including these materials, and a polarizing plate including the same. Background technique [0002] In recent years, the popularity and development of liquid crystal displays have been remarkable, and it is no exaggeration to say that they have been used in all products of electronic equipment. In addition, monitors for desktop PCs, LCD TVs, and the like are also increasing in size, and products larger than 40 inches often appear. A liquid crystal panel commonly used in liquid crystal displays has a structure in which a liquid ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F220/14G02B5/30
Inventor 小池康博多加谷明广小田纯久
Owner 小池康博