block copolymer

A technology of block copolymer and resin composition, which can be used in polarizing elements, instruments, optical elements, etc., and can solve the problems of insufficient heat resistance of soft components and low glass transition temperature.

Active Publication Date: 2021-05-14
NIPPON SHOKUBAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such a block polymer has a low glass transition temperature, and the heat resistance of the soft component is not sufficient, so there is room for improvement

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0491] A commercially available triblock copolymer containing a polymethyl methacrylate part (PMMA part) and a polybutylacrylate part (PBA part) [Clarity LA4285 manufactured by Kuraray Corporation (PMMA part: PBA part composition ratio ( Molar ratio) is 55:45, Tg above 40°C is 107°C, Tg below 40°C is -42°C)] 320 parts, toluene 480 parts are introduced into an autoclave with a stirrer, and heated at 100°C for 30 minutes After dissolving and cooling, 150 parts of 40% methylamine-methanol solutions were added, and it heated at 200 degreeC for 90 minutes further. The components of this reaction solution contained about 200 ppm of butanol, and it was confirmed that the glutarimide structure was also introduced into PBA. The obtained resin solution was dried under reduced pressure in a decompression dryer at 200° C. for 1 hour, and then pulverized to obtain a glass transition temperature of 125° C. above 40° C. and a glass transition temperature below 40° C. of Triblock copolymer (...

Embodiment 2

[0493] A commercially available triblock copolymer containing polymethyl methacrylate moieties and polybutyl acrylate moieties [M52 manufactured by Arkema Corporation (the composition ratio (molar ratio) of PMMA moieties: PBA moieties) is 55:45, 40° C. The above Tg is 104°C, and the Tg below 40°C is -43°C)] 320 parts and 480 parts of toluene are introduced into an autoclave with a stirrer, heated at 100°C for 30 minutes to dissolve, and 40% methylamine is added after cooling 120 parts of methanol solution were further heated at 200° C. for 20 minutes. The components of this reaction solution contained about 200 ppm of butanol, and it was confirmed that the glutarimide structure was also introduced into PBA. The obtained resin solution was dried under reduced pressure in a decompression dryer at 200° C. for 1 hour, and then pulverized to obtain a glass transition temperature of 120° C. above 40° C. and a glass transition temperature below 40° C. of Triblock copolymer (TB-2) ha...

Embodiment 3

[0495]Introduce 320 parts of a commercially available triblock copolymer (Clarity LA4285 manufactured by Kuraray Co., Ltd.) containing polymethyl methacrylate moieties and polybutyl acrylate moieties, and 480 parts of toluene into an autoclave with a stirrer, and heat at 100° C. After heating at low temperature for 30 minutes to dissolve, 200 parts of aniline was added after cooling, and it heated at 250 degreeC for 8 hours further. The components of the reaction liquid contained about 150 ppm of butanol, and it was confirmed that the glutarimide structure was also introduced into PBA. The obtained resin solution was dried under reduced pressure in a decompression dryer at 240° C. for 2 hours, and then pulverized to obtain a glass transition temperature of 132° C. above 40° C. and a glass transition temperature below 40° C. of Triblock copolymer (TB-3) with glutarimide rings at -38°C. In the triblock copolymer (TB-3), Mn is 24,000, Mw is 32,000, Mw / Mn=1.35, acid value is 0.3m...

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Abstract

The present invention provides a novel block copolymer comprising (meth)acrylate as a polymerization component and a film composed of the block copolymer. The novel block copolymer is a block copolymer containing (meth)acrylate as a polymerization component and having a ring structure in the main chain.

Description

technical field [0001] The present invention relates to a block copolymer containing (meth)acrylate as a polymerization component and having a ring structure in the main chain, a resin composition containing the block copolymer, a film formed from the resin composition, and the film comprising A polarizer, and an image display device provided with the polarizer. Background technique [0002] In recent years, transparent resins have been widely used in optical materials such as optical lenses, prisms, mirrors, optical discs, optical fibers, sheets and films for liquid crystal displays, and light guide plates. [0003] As these resins for optical materials, acrylic resins have been mainly used conventionally. [0004] Among them, acrylic resins having a ring structure are used for optical films and the like because of their transparency and heat resistance. Generally, acrylic resins having a ring structure are hard and brittle. Therefore, a method of imparting strength by bi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F293/00C08F8/48C08F220/18C08J5/18G02B5/30
CPCC08F8/48C08F293/00C08J5/18G02B5/30C08F22/40C08F222/06C08L33/08C08L53/00C08F212/22G02B5/305G02F1/133528G02B1/14
Inventor 中西秀高
Owner NIPPON SHOKUBAI CO LTD
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