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

A polymer composition, ultraviolet light technology, applied in chemical instruments and methods, preparation of organic compounds, preparation of carboxylic acid esters, etc., can solve the problems of weak increase of LCD brightness and low refractive index of coatings, and achieve good brightness Degree value, high index of refraction, easy-to-implement effects

Active Publication Date: 2015-08-26
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

[0055] The preparation method of the polymerizable composition provided by the invention can be obtained directly by uniformly mixing the components in the composition. Preferably, in order to shorten the mixing time, mixing is preferably performed at 40-80°C.

[0056] Finally, the present invention provides a backlight module, which includes 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.

[0057] Wherein, the structures of the lamp tube and the light guide plate are well known to those skilled in the art, and are not specifically limited in the present invention, and will not be repeated here. The brightness enhancing film is formed by irradiating and curing the polymerizable composition provided by the invention under ultraviolet light.

Embodiment 1

[0060] The raw materials used in this embodiment are as follows:

[0061] (a): the compound shown in the formula III; the compound of the structure shown in the formula XI is reacted with ethylene glycol in DMF to obtain the pre-product, and then the acrylic acid CH will be added 2 =CH-COOH, to obtain the compound represented by formula III.

[0062] (b): photoinitiator I184;

[0063] (c): crosslinking agent SR444;

[0064] (d): diluent: o-phenylphenethoxyethyl acrylate;

[0065] (e): Additive: 15wt% SiO 2 +40wt% octadecyl dimethyl hydroxyethyl quaternary ammonium salt+15wt% leveling agent BYK-333+15wt% defoamer BYK-018+15wt% lubricant.

[0066] The above raw materials were mixed together according to the ratio in Table 1, and heated and stirred at 50° C. until a uniform and transparent colloidal polymerizable composition S1 was formed. The above-prepared colloidal polymerizable composition S1 is coated on a polyethylene terephthalate (PET) substrate, and cured by ultravi...

Embodiment 2-4

[0068] Polymerizable compositions S2-S4 and brightness enhancing films S22-S44 were prepared using the same steps as in Example 1, except that the composition ratio of each component is shown in Table 1.

[0069] Table 1

[0070] Component

[0071]Note: In S2, (a) is the compound shown in formula IV, which is obtained by reacting the compound of formula XII with ethylene glycol and then reacting with acrylic acid; in S3, (a) is the compound shown in formula V, which is obtained by the reaction of formula V The compound of the structural formula shown in XIII reacts with ethylene glycol and then reacts with acrylic acid to make it; in S4, (a) is the compound shown in the formula VI, which is made by reacting the compound of the structural formula shown in the formula XIV with ethylene glycol and then reacting with acrylic acid .

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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 relatively strong effect on 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 in particular relates to an ultraviolet light curing monomer, a preparation method thereof, a polymerizable composition and a backlight module. Background technique [0002] Liquid crystal display (Liquid Crystal Display, LCD) has gradually replaced the traditional cathode ray tube display with the advantages of lightness, thinness, shortness, smallness, low heat consumption, low power consumption, and no radiation, and is widely used in electroluminescent panels, laptops, etc. Desktop computers, word processors, desktop monitors, televisions, video cameras, etc. The liquid crystal display is mainly composed of the panel and the backlight module. The panel itself does not emit light, so the backlight module as the 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/54C07C67/08C08F22/20C08F2/48C09D135/02G02F1/13357F21V5/00
Inventor 王韦达
Owner HUAWEI TEHCHNOLOGIES CO LTD
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