Coating composition and optical diffusion film

A technology for coating composition and diffusing particles, applied in the field of diffusion film, can solve problems such as poor leveling, coating surface lines, uneven coating of diffusion layer, etc., achieve high stability, small viscosity change, coating uniform effect

Active Publication Date: 2013-02-13
昆山乐凯锦富光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the existing optical diffusion film, its main components are base material, diffusion layer and back layer, in which the diffusion layer is mainly composed of resin, diffusion particles, solvent, crosslinking agent (or initiator), in order to achieve a good diffusion effect , the diffusion layer generally uses diffusion particles with a particle size of 10-40 microns, and its addition generally accounts for 15%-30% of the entire system. However, such a system has the following problems: (1) a large amount of particles dispersed in the coating liquid Due to the influence of its own gravity, the surface energy of the particles and the viscosity of the coating liquid, the particles with large particle sizes are easy to agglomerate and agglomerate, resulting in precipitation, and the dispersion stability of the coating liquid is poor; (2) Coating production Poor leveling of the coating liquid can easily cause uneven coating of the diffusion layer and lines on the coating surface; Holes cause "transparent spots" on the surface of the coating, seriously affecting production quality and production efficiency

Method used

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  • Coating composition and optical diffusion film
  • Coating composition and optical diffusion film
  • Coating composition and optical diffusion film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Preparation of coating composition:

[0049] Epoxy acrylic resin (EA) 5 parts,

[0050] Polyurethane Acrylate (PUA) 35 parts,

[0051] 184 1.0 copies,

[0052] 850 1.0 copies,

[0053] BYK307 0.1 parts,

[0054] Butanone 100 parts,

[0055] 100 parts of toluene,

[0056] PMMA microbeads (10μm) 50 parts,

[0057] 10 parts of cellulose acetate butyrate,

[0058] First, add epoxy acrylic resin and polyurethane acrylate to the mixed solvent composed of methyl ethyl ketone and toluene to disperse evenly, then add cellulose acetate butyrate, stir and disperse evenly, then add leveling agent BYK307 and diffusion particles PMMA microbeads , and finally add photoinitiators 184 and 850, and stir to obtain a coating composition.

[0059] Apply the above-prepared coating composition to one side of a polyethylene terephthalate film as a substrate, and after drying the formed coating at 80-90° C. for 2.0 minutes, use 700 mj / cm 2 The amount of light is irradiated with ultravi...

Embodiment 2

[0061]Preparation of coating composition:

[0062] Epoxy acrylic resin (EA) 5 parts,

[0063] Polyurethane Acrylate (PUA) 40 parts,

[0064] 184 1.5 parts,

[0065] 850 1.5 parts,

[0066] BYK307 0.20 parts,

[0067] 100 parts of toluene,

[0068] Polystyrene microbeads (20μm) 70 parts,

[0069] 15 parts of cellulose acetate,

[0070] First, add epoxy acrylic resin and polyurethane acrylate to toluene solvent to disperse evenly, then add cellulose acetate, stir to disperse evenly, then add leveling agent BYK307 and diffusion particle polystyrene microbeads, and finally add photoinitiator 184 And 850, get the coating composition after stirring.

[0071] Apply the above-prepared coating composition to one side of a polyethylene terephthalate film as a substrate, and after drying the formed coating at 80-90° C. for 2.0 minutes, use 700 mj / cm 2 The amount of light is irradiated with ultraviolet light to cure the coating to form a diffusion layer; and then prepare a back la...

Embodiment 3

[0073] Preparation of coating composition:

[0074] Ethoxylated pentaerythritol tetraacrylate 25 parts,

[0075] Polyurethane Acrylate (PUA) 40 parts,

[0076] 184 2.0 copies,

[0077] 850 1.5 parts,

[0078] BYK307 0.3 parts,

[0079] Butanone 80 parts,

[0080] 30 parts of isopropanol,

[0081] 140 parts of toluene,

[0082] Silica microbeads (30μm) 90 parts,

[0083] Cellulose acetate propionate 22 parts,

[0084] First, add ethoxylated pentaerythritol tetraacrylate and urethane acrylate resin to a mixed solvent composed of butanone, toluene and isopropanol to disperse evenly, then add cellulose acetate propionate, stir evenly before adding leveling agent BYK307 and diffusion particle silica microbeads, finally add photoinitiator 184 and 850, stir well to obtain coating composition.

[0085] Apply the above-prepared coating composition to one side of a polyethylene terephthalate film as a substrate, and after drying the formed coating at 80-90° C. for 2.0 minutes, ...

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Abstract

The invention relates to a coating composition and an optical diffusion barrier. The coating composition contains the following components in parts by weight: 40-70 parts of thermosetting resin or ultraviolet curing resin, 50-180 parts of diffusion particle, 2.0-10 parts of cross-linking agent or photoinitiator, 0.10-2 parts of leveling agent, 10-60 parts of cellulose ester and 100-300 parts of solvent. The coating composition has the advantages of high stability, and no aggregation or precipitation among particles; and the viscosity variation of the coating composition is slight. The coating of the optical diffusion film containing the coating composition is uniform, the coating surface does not have the defects of lines, white spots, liquor lines, transparent spots and the like, and thus, the optical diffusion film can satisfy the demands for backlight modules.

Description

technical field [0001] The present invention relates to a coating composition and a diffusion film formed using the coating composition. Background technique [0002] For a long time, flat panel displays have been widely used in TVs, computer monitors, notebook computers, mobile phones, digital cameras, handheld computers, GPS navigators, etc. The picture light source of these liquid crystal displays is provided by the backlight module, and the requirements for the light source are uniform and high brightness. [0003] The role of the optical diffusion film is to uniformly diffuse the light from a point light source or a line light source into a uniform, high-brightness surface light source through refraction. This optical diffusion film is widely used in the backlight module of liquid crystal display or plasma display. [0004] The typical structure of the flat panel display backlight module device is: the light is emitted from the light source, passes through the reflect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D127/06C09D123/08C09D183/04C09D125/06C09D133/04C09D175/04C09D7/12C09D175/14C09D163/00C09D167/06G02B5/02
Inventor 鲁若娜孟亮常国岭
Owner 昆山乐凯锦富光电科技有限公司
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