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Preparation method and application of organosilicon photo-diffusion particle

A technology of light diffusing particles and silicone, applied in optics, optical components, instruments, etc., can solve the problems of firm bonding of acrylic glue, aggregation of white spot defects, etc., and achieve the effect of high optical efficiency and firm bonding

Active Publication Date: 2013-09-04
JIANGSU YONGXIN MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in coating applications, light-diffusing particles need to be uniformly dispersed in solvents such as ethyl acetate and butyl acetate, and acrylic glue, and then coated on a PET film and dried. The surface characteristics of PMMA light-diffusing particles ( Polymethyl methacrylate structure) is similar to ethyl acetate, butyl acetate solvent, acrylic glue, etc. It is easy to disperse according to the principle of similar compatibility, and there are few defects such as white spots caused by the aggregation of light-diffusing particles.
The surface of silicone light-diffusing particles is mostly a polymethylsiloxane structure that is quite different from ethyl acetate, butyl acetate solvent, acrylic glue, etc., so when its concentration is slightly higher, large-area aggregated white spot defects will appear At the same time, the combination with the cured acrylic glue is not as strong as PMMA light diffusion particles

Method used

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  • Preparation method and application of organosilicon photo-diffusion particle
  • Preparation method and application of organosilicon photo-diffusion particle
  • Preparation method and application of organosilicon photo-diffusion particle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Preparation of Silicone Light Diffusing Particles

[0041] 1. Material:

[0042] 1) Methacryloxypropyltrimethoxysilane

[0043] 2) Methyltrimethoxysilane

[0044] 3) Deionized water

[0045] 4) Acid: Strong acids such as hydrochloric acid and sulfuric acid

[0046] 5) Alkali: lithium hydroxide, sodium hydroxide, potassium hydroxide, ammonia water, etc.

[0047] 2. Production method:

[0048] 1) Methacryloxypropyltrimethoxysilane:methyltrimethoxysilane=1:99–20:80

[0049] 2) (methacryloxypropyltrimethoxysilane+methyltrimethoxysilane): deionized water=1:50–1:2

[0050] 3) Acid: Appropriate amount

[0051] 4) Alkali: appropriate amount

[0052] 5) Add the mixture of methacryloxypropyltrimethoxysilane and methyltrimethoxysilane in proportion to deionized water, add acid until the pH value is 5-6 and stir until the system is completely transparent

[0053] 6) Add alkali until the pH value is 10-12, stop stirring for 3-5 minutes, and stand still for 4-5 hours, or inc...

Embodiment 2

[0058] Embodiment 2 dispersion test

[0059] Mix the silicone light-diffusing particles prepared according to Examples 1-6 in Example 1 and butyl acetate solvent in a weight ratio of 1:3, then add acrylic glue with a solvent weight of 1 / 3, and stir for 120 minutes with a paddle stirrer , coated on PET film and dried, observed under a microscope whether agglomeration occurs.

[0060] Comparative test: non-polar light diffusing particles EL500 (Yongqi material)

[0061] Results The organic silicon light-diffusing particles of the present invention did not agglomerate, while the comparative non-polar light-diffusing particles had at least 10 white spots agglomerated per 100 square centimeters.

[0062] In each example, methacryloxypropyltrimethoxysilane is respectively made of methacryloxypropyltriethoxysilane, glycidyloxypropyltrimethoxysilane, glycidyloxypropyltrimethoxysilane Ethoxysilane, Acryloxypropyltrimethoxysilane, Acryloxypropyltriethoxysilane, Chloropropyltrimethoxys...

Embodiment 3

[0063] The preparation of embodiment 3 light diffusion film

[0064] 1. Materials used:

[0065] i. Light diffusing particles

[0066] ii. Coating resin: acrylic resin

[0067] iii. Curing agent: isocyanate curing agent

[0068] iv. Substrate film: optical grade PET film, thickness 100um

[0069] v. Solvent: butyl acetate

[0070] 2. Equipment used:

[0071] vi. Coating roller

[0072] vii. Circulating Dryer

[0073] 3. Production method:

[0074] viii. Add 40-170 grams of light-diffusing particles prepared by each example in Example 1 to 400 grams of solvent, and stir for more than 2 hours until the light-diffusing particles are evenly dispersed in the solvent

[0075] ix. Add 40-100 grams of coating resin and curing agent to the above mixture i, stir well

[0076] x. Use a coating roller to evenly coat ii on the substrate film

[0077] xi. Dry with a circulating dryer at 80-100°C for 3 minutes.

[0078] Haze testing instrument: Shanghai Jingke light transmittance ...

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Abstract

The invention relates to a preparation method and application of an organosilicon photo-diffusion particle. The preparation method comprises the following steps of: hydrolyzing silane with polar groups in acidic water or co-hydrolyzing silane with polar groups and silane without polar groups in acidic water; and then condensing the hydrolysate into an organosilicon resin spherical particle in alkaline water. The prepared organosilicon photo-diffusion particle is suitable to serve as a coating photo-diffusion membrane, has higher optical efficiency than the PMMA (poly(methyl methacrylate))-based photo-diffusion particle, can also avoid the defects caused by aggregation of photo-diffusion particles, and is simultaneously bonded with cured glue firmly.

Description

technical field [0001] The invention relates to the field of light-diffusing films, in particular to a preparation method and application of organic silicon light-diffusing particles. Methyl acrylate (PMMA) based light diffusing particles. Background technique [0002] Light-diffusing films are widely used in various liquid crystal displays such as TVs, computer monitors, and smartphones, as well as semiconductor lighting that has gradually expanded in recent years. The basic structure of most diffusion films is to coat light-diffusing particles on both sides or one side of a transparent substrate (such as a PET film). The refractive index of the light-diffusing particles is different from that of PET (ethylene terephthalate). The diffusion layer uses PET as the base material and passes through media with different refractive indices, causing many phenomena of refraction, reflection and scattering of light, which can correct the light into a uniform surface light source to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/06C09D7/12G02B5/02G02B1/10
Inventor 姜文
Owner JIANGSU YONGXIN MATERIAL TECH CO LTD
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