A kind of polysulfide maleimide optical resin and preparation method thereof

Abstract

The invention provides a polythioether maleimide optical resin and a preparation method thereof. The molecular structural formula of the polythioether maleimide optical resin is shown in formula (1), and the preparation method uses methyl Maleic anhydride is the starting material to obtain the dimethylmaleimide monomer, and then through the mercapto-alkenyl click chemistry method, a mercapto group is introduced in the methyl bismaleimide monomer to obtain the polysulfide maleimide Imide optical resin. The double-horse type polyimide resin of the technical solution of the present invention has the advantages of medium and low temperature curing, colorless and transparent, high refractive index and high thermal stability, and can be used as an optical resin for LED packaging.

Description

Technical field

[0001] The present invention belongs to the technical field of polymer material, and more particularly to a polysulfide maleimide optical resin and a preparation method thereof, in particular to a high refractive index high transparency polysulfide maleimide optical resin and Its preparation method. Background technique

[0002] LED LEDs are well received as a new generation of solid light sources. Since the chip of the LED has a high refractive index (approximately 2.2), the refractive index difference between the package resin is large, resulting in a total reflection of the interface light, and the light extraction efficiency is not high. At present, the regeneration of the silicone package resin of the LED is only 1.4 to 1.5, and the refractive index of the chip is large, resulting in lower removal light efficiency, only 10% of the theoretical value.

[0003] According to the Lorentz-Lorenz equation, the method of improving the polymer refractive index is main...

Examples

Embodiment 1

[0044] A polysulfide-eatel maleimide optical resin, which is prepared by the following steps:

[0045] The methyl maleic anhydride (10.5 mmol) of glacial acetic acid (50 mL) was added dropwise to Icevene (100 mL) solution containing 4,4'-diaminobenzol (DDS, 5 mmol), and stirred at room temperature for 1 h. The reaction mixture was then heated to reflux for 4 h, concentrated under reduced pressure and cooled to 200 ml of water. Filter the formed solids and use a 100 ml mass percent concentration of 3% NA 2 CO 3The solution was washed, then washed with deionized water, and 12 h was dried at 70 ° C in a vacuum oven to give a white solid, acetone recrystallization was recrystallized to give 4,4'-di amino diphenyl sulfur double methylimide. (DDS-BCI).

[0046] The mixed 4,4'-diaminophenyl sulfone-based double-methylbenyleimide monomer and dimercaramide sulfide are reacted, and the mephen solvent is dissolved, the initiator is added, stirred at 30 ° C. 4 hours. Among them, the initiator...

Technical field

[0001] The present invention belongs to the technical field of polymer material, and more particularly to a polysulfide maleimide optical resin and a preparation method thereof, in particular to a high refractive index high transparency polysulfide maleimide optical resin and Its preparation method. Background technique

[0002] LED LEDs are well received as a new generation of solid light sources. Since the chip of the LED has a high refractive index (approximately 2.2), the refractive index difference between the package resin is large, resulting in a total reflection of the interface light, and the light extraction efficiency is not high. At present, the regeneration of the silicone package resin of the LED is only 1.4 to 1.5, and the refractive index of the chip is large, resulting in lower removal light efficiency, only 10% of the theoretical value.

[0003] According to the Lorentz-Lorenz equation, the method of improving the polymer refractive index is main...

Examples

Embodiment 1

[0044] A polysulfide-eatel maleimide optical resin, which is prepared by the following steps:

[0045] The methyl maleic anhydride (10.5 mmol) of glacial acetic acid (50 mL) was added dropwise to Icevene (100 mL) solution containing 4,4'-diaminobenzol (DDS, 5 mmol), and stirred at room temperature for 1 h. The reaction mixture was then heated to reflux for 4 h, concentrated under reduced pressure and cooled to 200 ml of water. Filter the formed solids and use a 100 ml mass percent concentration of 3% NA 2 CO 3The solution was washed, then washed with deionized water, and 12 h was dried at 70 ° C in a vacuum oven to give a white solid, acetone recrystallization was recrystallized to give 4,4'-di amino diphenyl sulfur double methylimide. (DDS-BCI).

[0046] The mixed 4,4'-diaminophenyl sulfone-based double-methylbenyleimide monomer and dimercaramide sulfide are reacted, and the mephen solvent is dissolved, the initiator is added, stirred at 30 ° C. 4 hours. Among them, the initiator...

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