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Polyamideimide having norbornane skeleton and production method for same

A technology of polyamideimide and norbornane, applied in the field of polyamideimide, can solve the problems of lack of transparency and easy coloring, and achieve the effects of excellent transparency and excellent heat resistance

Inactive Publication Date: 2014-05-07
RESONAC CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In general, epoxy resins have high transparency under visible light, but cannot obtain sufficient transparency in the ultraviolet to near-ultraviolet region
In addition, although the cured product composed of cycloaliphatic epoxy resin and acid anhydride has high transparency in the near-ultraviolet region, there are problems such as easy coloring due to heat and light.

Method used

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  • Polyamideimide having norbornane skeleton and production method for same
  • Polyamideimide having norbornane skeleton and production method for same
  • Polyamideimide having norbornane skeleton and production method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0156] Hereinafter, the present invention will be described in detail through examples. However, the scope of the present invention is not limited to the following examples.

[0157]

Synthetic example 1）

[0158] (Synthesis Example 1) [Formation of Cyclopentadiene]

[0159] [chemical 14]

[0160]

[0161] 700 g of dicyclopentadiene was charged into a 1-liter flask equipped with a stirrer, a thermometer, and a Schneider-type fractionating tube (7 stages) equipped with a fractionating column, a thermometer, and a cooling tube on the top of the column, and heated in an oil bath. When the temperature in the flask reached 158° C., cyclopentadiene was gradually distilled from the top of the fractionation column, and therefore, it was recovered in about 6 hours while cooling the receiver with ice. The distillation temperature at this time was 41-48 degreeC, and the recovery amount was 609g (recovery rate: 87%). The resulting cyclopentadiene was analyzed by gas chromatography, and the result was a purity of 100%.

Synthetic example 2）

[0162] (Synthesis example 2) [Synthesis of norbornene dicarboxylate methyl ester]

[0163] [chemical 15]

[0164]

[0165] In a 1-liter flask with a stirrer, a thermometer, a dropping funnel, and a cooling tube, drop 432 g (3.0 moles) of dimethyl maleate, cool the flask with water, and add dropwise the ring obtained in Synthesis Example 1 while stirring. 198g (3.0 moles) of pentadiene, while keeping the temperature in the flask at 30-40°C. After completion of the dropwise addition, the reaction was carried out for 6 hours while maintaining the reaction temperature, and analyzed by a gas chromatograph. As a result, dimethyl maleate and cyclopentadiene as raw materials completely disappeared, and methyl norbornene dicarboxylate was obtained. The reaction solution with a selectivity of 99.2% (0.8% of dicyclopentadiene formation). In addition, the isomer ratio of this norbornene dicarboxylate methyl ester was exo isomer / endo isomer=25 / 75.

[0166]

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Abstract

A polyamideimide which has norbornane skeleton represented by general formula (I) is reacted, in a polar solvent, with a norbornane tricarboxylic acid anhydride represented by general formula (II), and a diisocyanate compound. Thus, the disclosed polyamideimide has a norbornane skeleton and exhibits excellent heat resistance and transparency. Also disclosed is a production method for the same. (In formula (I) X is a divalent organic group selected from among a divalent aliphatic group having 4-16 carbon atoms, a divalent alicyclic group having 4-16 carbon atoms and a divalent aromatic group.)

Description

technical field [0001] The present invention relates to a polyamideimide having a norbornane skeleton, which is useful as a polymer having high heat resistance and transparency. Furthermore, the present invention relates to its production method. Background technique [0002] Conventionally, as resins for optical components used in optoelectronic devices and the like, epoxy resins have been widely used in view of mounting processes on electronic substrates and the like, heat resistance under high-temperature operation, mechanical properties, or versatility. However, in recent years, in the field of optoelectronic devices, the use of high-intensity laser light, blue light, and near-ultraviolet light has also expanded, and resins more excellent in transparency, heat resistance, and light resistance than conventional ones have been demanded. [0003] In general, epoxy resins have high transparency under visible light, but sufficient transparency cannot be obtained in the ultra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/14C08G18/34
CPCC08G18/751C08G73/14C08G18/7671C08G73/1035C08G73/1075C08G18/755C08G18/343C08G18/34C08L79/08
Inventor 川上广幸
Owner RESONAC CORPORATION