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Ultraviolet curable monomer and its preparation method, polymerizable composition and backlight module

A technology of polymer composition and ultraviolet light, which is applied in optics, electric light source, organic chemistry, etc., can solve the problems of weak increase of LCD brightness and low refractive index of coating, and achieve good luminance value, high refractive index, The effect of increasing the refractive index

Active Publication Date: 2015-11-25
HUAWEI TEHCHNOLOGIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this invention, the refractive index of the coating formed by the polymerizable composition is low, and the increase level of LCD brightness is still relatively weak

Method used

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  • Ultraviolet curable monomer and its preparation method, polymerizable composition and backlight module
  • Ultraviolet curable monomer and its preparation method, polymerizable composition and backlight module
  • Ultraviolet curable monomer and its preparation method, polymerizable composition and backlight module

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preparation example Construction

[0050] The preparation method of the polymerizable composition provided by the present invention can be obtained by directly mixing the components in the composition uniformly. Preferably, in order to shorten the mixing time, mixing is preferably performed at 40-80°C.

[0051] Finally, the present invention provides a backlight module, which comprises a lamp tube, a light guide plate and a brightness enhancement film, wherein the brightness enhancement film is formed by curing the polymerizable composition provided by the present invention.

[0052] Among them, the structure of the lamp tube and the light guide plate are well-known to those skilled in the art, and there is no special limitation in the present invention, and will not be repeated. The brightness enhancement film is formed by irradiating and curing the polymerizable composition provided by the present invention under ultraviolet light.

Embodiment 1

[0055] The raw materials used in this embodiment are as follows:

[0056] (a): Compound represented by formula II; react the compound represented by IX (o-hydroxyphenyldihydroacridine) with ethylene glycol in DMF to obtain the pre-product, and then add acrylic acid CH 2 =CH-COOH to obtain the compound represented by formula II.

[0057] (b): Photoinitiator UV307;

[0058] (c): Crosslinking agent SR494;

[0059] (d): Diluent CP-011;

[0060] (e): Additive: 15wt% SiO 2 +40wt% octadecyl dimethyl hydroxyethyl quaternary ammonium salt+15wt% leveling agent BYK-333+15wt% defoamer BYK-018+15wt% lubricant.

[0061] The above-mentioned raw materials were mixed together according to the ratio in Table 1, and heated and stirred at 50° C. to form a uniform and transparent colloidal polymerizable composition S1. The colloidal polymerizable composition S1 prepared above is coated on a polyethylene terephthalate (PET) substrate, and cured by ultraviolet light to form a coating with a prism pattern, and...

Embodiment 2-4

[0063] The polymerizable composition S2-S4 and the brightness enhancement film S22-S44 were prepared using the same steps as in Example 1, except that the distribution ratio of each group is shown in Table 1.

[0064] Table 1

[0065] Component

[0066] Note: In S2, (a) is the compound represented by formula III, which is composed of the compound represented by formula IX and HO-CH 2 -CH 2 -O-CH 2 -CH 2 -OH is reacted with acrylic acid and then prepared; in S3, (a) is a compound represented by formula IV, which is produced by a compound represented by formula X and HO-CH 2 -CH 2 -O-CH 2 -CH 2 -OH is reacted with acrylic acid and then prepared; in S4, (a) is a compound represented by formula V, which is produced by the compound represented by formula XI and HO-CH 2 -CH 2 -O-CH 2 -CH 2 -OH reacted with acrylic acid to prepare.

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Abstract

The invention provides an ultraviolet curing monomer and a preparation method thereof. The invention also provides a polymerizable composition. The polymerizable composition contains a monomer, a photoinitiator, a crosslinking agent and an additive or not, wherein the monomer is the ultraviolet curing monomer provided by the invention. The ultraviolet curing monomer provided by the invention has relatively high refractive index, thus the refractive index of the polymerizable composition adopting the monomer is also relatively high, and a brightness enhancement film realizes a strong effect in enhancing the brightness; and a backlight module adopting the brightness enhancement film has a good brightness value.

Description

Technical field [0001] The invention belongs to the field of liquid crystal displays, and particularly relates to an ultraviolet curing monomer and a preparation method thereof, a polymerizable composition and a backlight module. Background technique [0002] Liquid Crystal Display (LCD) has gradually replaced traditional cathode ray tube displays with the advantages of light, thin, short, small, low heat consumption, low power consumption, and no radiation, and is widely used in electroluminescent panels and laptops. Computers, word processors, desktop monitors, televisions, cameras, etc. The LCD is mainly composed of a panel and a backlight module. The panel itself does not emit light. Therefore, the backlight module as a source of brightness is an important component of the LCD display function. The backlight module includes lamp tubes, light guide plates, and various optical films. In order to enable the LCD to present better viewing angles and colors, various optical films...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D219/02C08F220/36C08F2/44C08K5/19G02F1/13357F21S8/00F21V5/00
Inventor 王韦达
Owner HUAWEI TEHCHNOLOGIES CO LTD
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