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Optical film comprising halogenated polycarbonate

A technology of polycarbonate and optical film, which is applied in the field of optical film, can solve the problems of large coloring and no consideration, and achieve the effects of less coloring, high thermal dimensional stability, and low thermal dimensional stability

Active Publication Date: 2012-10-24
TEIJIN KASEK KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when such a high molecular weight halogenated polycarbonate is formed into a film by extrusion molding alone, the use of the high molecular weight halogenated polycarbonate itself as a material suitable for optical applications is not considered due to the large coloring of the film. membrane

Method used

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  • Optical film comprising halogenated polycarbonate
  • Optical film comprising halogenated polycarbonate
  • Optical film comprising halogenated polycarbonate

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preparation example Construction

[0057]

[0058] In the reaction by the interfacial polymerization method, halogenated dihydric phenols are generally reacted with phosgene, and the reaction is carried out in the presence of an acid binder and an organic solvent.

[0059] As the acid binder, alkali metal hydroxides such as sodium hydroxide and potassium hydroxide, or amine compounds such as pyridine are used. As the organic solvent, halogenated hydrocarbons such as dichloromethane and chlorobenzene are used.

[0060] In addition, in the reaction by the interfacial polymerization method, for example, an amine-based catalyst or a phosphonium-based catalyst may be used in order to promote the reaction. Examples of amine catalysts include trimethylamine, triethylamine, tripropylamine, tributylamine, trihexylamine, trioctylamine, tridecylamine, dimethyl-n-propylamine , Diethyl-n-propylamine, N,N-dimethylcyclohexylamine, pyridine, N,N-dimethylaniline, N,N-dimethyl-4-aminopyridine, N,N-di Tertiary amines such as ...

preparation example

[0062] As halogen-substituted dihydric phenols, halogen-substituted dihydric phenols with a structure in which a large halogen element is bonded to the 1 and 5 positions of the hydroxyl group such as tetrabromobisphenol A, due to the steric hindrance of the halogen element, the Since the reactivity of the bulk substance tends to decrease, in order to obtain a carbonate having a high molecular weight and very few oligomers, the production method by the following interfacial polymerization method is preferable.

[0063] That is, when producing a halogenated carbonate by reacting an aqueous alkali solution of a halogen-substituted dihydric phenol with phosgene in the presence of an organic solvent, the following conditions (a) to (c) are preferably satisfied.

[0064] (a) Until the end of the phosgenation reaction, the total amount of base used is suppressed to 2.0 times moles or less relative to the halogenated dihydric phenols, and transferred to the subsequent polymerization re...

Embodiment 1

[0197]

[0198] Add tetrabromobisphenol A 130g (0.239 mol), 7.0% sodium hydroxide aqueous solution 161ml (sodium hydroxide 0.299 mol), dichloromethane 393ml, and triethylamine 0.2 ml (0.002 mol) and dissolved, kept at 20-25°C under stirring, and 28.5 g (0.289 mol) of phosgene was blown in for 60 minutes. In the final stage of blowing in phosgene, 5 ml of 25% aqueous sodium hydroxide solution (0.041 mol of sodium hydroxide) was added, while maintaining the pH of the reaction mixture at 10.5 to 11.0 to carry out the phosgenation reaction.

[0199] After the phosgenation reaction finishes, add p-tert-butylphenol 0.20g (0.0013 mole), then use about 60 minutes to mix triethylamine 0.8ml (0.008 mole) and 25% sodium hydroxide aqueous solution 44ml (sodium hydroxide 0.363 mole) Add it into the reaction mixture, and react at a temperature of 35-40° C. for 90 minutes.

[0200] The separated dichloromethane phase was washed with acid and water until the inorganic salts and amines disa...

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Abstract

Provided is an optical film, which is made of a halogenated polycarbonate, has high heat resistance and high dimensional stability to heat, and is flame retardant. The optical film is obtained by producing a halogenated polycarbonate by a solution-casting method. The halogenated polycarbonate has a glass transition temperature of 230 C or higher, a weight average molecular weight of more than 50,000, and an oligomer content of 0.6% by weight or less.

Description

technical field [0001] This invention relates to optical films made from halogenated polycarbonates. Specifically, the present invention relates to an optical film made of halogenated polycarbonate, less colored, having high heat resistance, high thermal dimensional stability and flame retardancy, and having sufficient mechanical properties. Background technique [0002] Electrodes are arranged on a transparent substrate, and display elements, light-emitting elements, or light-receiving elements are formed on electronic equipment, such as liquid crystal displays, organic EL displays, organic EL lighting, thin-film solar cells, and organic solar cells. Use glass. By replacing the glass with a resin, new functions that are difficult to achieve for glass substrates, such as flexibility, light weight, and impact resistance, can be imparted. Therefore, various developments have been made to replace the glass with resin. [0003] However, since resins have lower heat resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18B29C41/12C08G64/10
CPCC08J2369/00C08J5/18G02B1/04C08G64/10C08L69/00
Inventor 池田幸纪木下明香前川祥一
Owner TEIJIN KASEK KK
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