Photodiffusion agent, photodiffusion film and preparation method of photodiffusion film

A technology of light diffusing agent and light diffusing film, used in optics, nonlinear optics, coatings, etc., can solve the problems of poor scratch resistance, poor adhesion, and poor leveling, and achieve good The effect of scratch resistance, good leveling, and stable light diffusion performance

Active Publication Date: 2011-06-22
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned patent application, although a scratch-resistant layer is formed on the second surface of the base material of the scratch-resistant optical film, thereby having good scratch resistance performance, however, the base material of the scratch-resistant optical film The scratch resistance of the diffusion layer formed on the second surface of

Method used

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Examples

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Example Embodiment

[0024] The present invention also provides a method for preparing a light diffusing film, wherein the method includes coating a light diffusing agent on one surface of the substrate, and then performing UV curing. The light diffusing agent is the Light diffuser.

[0025] In the method provided by the present invention, the method for coating the light diffusing agent on the substrate can be a method conventionally used in the art, such as roller coating, knife coating or silk screen printing. Specifically, the roller coating The methods of squeegee coating and silk screen printing are well known to those skilled in the art and will not be repeated here. The UV curing method can also be implemented using methods known to those skilled in the art. For example, the UV curing conditions can include: UV light intensity of 40-2000 W / cm 2 , Preferably 60-180W / cm 2 The curing time is 2-200 seconds, preferably 20-150 seconds.

Example Embodiment

[0027] Example 1

[0028] This embodiment is used to illustrate the light diffusing agent, light diffusing film and preparation method of the light diffusing film provided by the present invention.

[0029] At room temperature, 9 parts by weight of aliphatic urethane acrylate (manufactured by Sartomer, model CN968) with a number average molecular weight of 1000-5000, 18.2 parts by weight of THEICTA, 17 parts by weight of HDDA, and 12.1 parts by weight PETA, 3 parts by weight of BAPO (produced by Ciba Fine Chemicals) and 1.2 parts by weight of acrylic polyester modified polysiloxane (produced by BYK Chemical Company, model BYK371) are thoroughly mixed, and 100 parts are added to it Weight parts of polyacrylic acid particles with an average particle diameter of 16 microns (produced by Soken Chemical Co., Ltd., model MTR-16H, where the largest particle has a particle diameter of 12 microns larger than the smallest particle), stir and disperse uniformly to obtain a light diffuser .

[...

Example Embodiment

[0031] Example 2

[0032] This embodiment is used to illustrate the light diffusing agent, light diffusing film and preparation method of the light diffusing film provided by the present invention.

[0033] At room temperature, 10 parts by weight of aliphatic urethane acrylate with a number average molecular weight of 4000-10000 (produced by Ubusi, model EB245), 13 parts by weight of THEICTA, 13 parts by weight of HDDA, 4 parts by weight PETA, 3.5 parts by weight of TPO (produced by Ciba Fine Chemicals) and 1.8 parts by weight of acrylic polyester modified polysiloxane (produced by BYK Chemical Company, model BYK306) are thoroughly mixed, and 100 parts are added to it Weight parts of polyacrylic acid particles with an average particle diameter of 26 microns (produced by Soken Chemical Co., Ltd., model MTR-26H, where the largest particle has a particle diameter of 10 microns larger than the smallest particle), stir and disperse uniformly to obtain a light diffuser .

[0034] Roll th...

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PUM

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Abstract

The invention provides a photodiffusion agent which contains polyurethane-acrylate, polymerizable monomers and organic particles, wherein the number-average molecular weight of the polyurethane-acrylate is 1000-10000, the polymerizable monomers are acrylate monomers of at least two multifunctional groups, and the average particle diameter of the organic particles is 1.8-30 micrometers. The invention also provides a photodiffusion film and a preparation method thereof. The photodiffusion film comprises a substrate and a photodiffusion layer attached to one surface of the substrate, wherein thephotodiffusion agent provided by the invention cures under the action of UV (ultraviolet) to form the photodiffusion layer. The photodiffusion layer in the photodiffusion film, which is prepared fromthe photodiffusion agent provided by the invention, has favorable mar resistance, and the photodiffusion film has favorable light transmittance and photodiffusion performance.

Description

technical field [0001] The invention relates to a light-diffusing agent, a light-diffusing film formed from the light-diffusing agent, and a preparation method of the light-diffusing film. Background technique [0002] In the backlight unit of a liquid crystal display, a light-diffusing film is used to increase the brightness in the front direction without the light-diffusing pattern of the light-guiding film appearing. As such a light-diffusion film, the light-diffusion layer which consists of a light-diffusion agent is generally provided in one surface of a base material. Usually, the light diffusing agent that forms the light diffusing layer is a thermosetting coating, and is coated on the substrate by screen printing, roller coating, blade coating, etc., and is cured to obtain a light diffusing film. [0003] CN 101067665A discloses a scratch-resistant optical film, comprising: (a) a transparent substrate, the substrate has a first surface and a second surface; (b) a di...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D5/00G02B5/02G02F1/13357
Inventor 金启明吴波
Owner BYD CO LTD
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