Anti-ultraviolet hardened film

A UV protection and hardening film technology, applied in the direction of radiation-absorbing coatings, coatings, polyurea/polyurethane coatings, etc., can solve the problem of reducing the light transmittance and clarity of the hardened film, changing the color of the hardened film, and easily releasing small molecules, etc. problem, to achieve the effect of reducing the UV protection effect and stabilizing the weather resistance

Pending Publication Date: 2022-03-22
HEFEI LUCKY SCI & TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The added UV absorber is usually a high molecular organic substance, which is prone to mismatch with the formula system during use and is easy to precipitate or precipitate, reducing the light transmittance and clarity of the hardened film, and it needs to be added in a large amount to achieve the effect. To a certain extent, the physical properties of the cured film are reduced and the weather resistance is not strong. It is easy to precipitate small molecules after long-term use.
Organic UV absorbers usually have a darker color, which not only changes the color of the cured film from the naked eye, but also changes the b* value of the cured film, affecting the practical effect of the cured film in the display field
[0004] Therefore, it is necessary to design a hardened film that does not reduce the original performance of low flash point, high wear resistance, high light transmittance, high clarity and no whitening, and increases ultraviolet absorption performance, weather resistance and mechanical properties, which can overcome existing problems that cannot be balanced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072]

[0073]

[0074]After modifying 20 parts by weight of urethane acrylate UVU6906 of Xilaiwu Company, add it to 87.49 parts by weight of mixed solvent to swell and stir evenly. The mixed solvent is 35 parts by weight of methyl isobutyl ketone, 35 parts by weight of ethyl acetate and 17.49 parts by weight. parts by weight toluene. Add 0.01 parts by weight of polyether silicone leveling agent (BYK-378 from Sapphire) into the solution, continue to add 0.5 parts by weight of photoinitiator 1-hydroxycyclohexyl phenyl ketone, and stir for 20 minutes. Finally, 2 parts by weight of double-shell hollow nanosphere particles composed of silicon dioxide and titanium dioxide were added for 30 minutes of high-speed stirring and dispersion at a stirring speed of 1200 r / min.

[0075] Use a wire bar coater to coat the coating solution on one side of an optical-grade polytriacetate cellulose film (TAC film) with a thickness of 80 μm, dry it in an oven at 60 ° C for 3 min, and irradi...

Embodiment 2

[0077]

[0078] 15 parts by weight of urethane acrylate UVU6208 of Xilaiwu Company are modified and then added to 62 parts by weight of mixed solvent to swell and stir evenly. The mixed solvent is 24 parts by weight of methyl isobutyl ketone, 24 parts by weight of ethyl acetate and 14 parts by weight parts by weight toluene. Add 1.5 parts by weight of polyether silicone leveling agent (BYK-399 from Sapphire) into the solution, continue to add 1.5 parts by weight of photoinitiator 1-hydroxycyclohexyl phenyl ketone, and stir for 20 min. Finally, 20 parts by weight of double-shell hollow nanosphere particles composed of silicon dioxide and titanium dioxide were added for 40 minutes of high-speed stirring and dispersion at a stirring speed of 1200 r / min.

[0079] Use a wire bar coater to coat the coating solution on one side of an optical-grade polytriacetate cellulose film (TAC film) with a thickness of 80 μm, dry it in an oven at 60 ° C for 3 min, and irradiate it with ultrav...

Embodiment 3

[0081]

[0082] After modifying 15 parts by weight of DSM's polyurethane acrylate Agisyn 670A2, add it to 77 parts by weight of mixed solvent to swell and stir evenly. The mixed solvent is 30 parts by weight of methyl isobutyl ketone, 30 parts by weight of ethyl acetate and 17 parts by weight toluene. Add 1.5 parts by weight of polyether silicone leveling agent (BYK-3751 from Sapphire) into the solution, continue to add 1.5 parts by weight of photoinitiator 1-hydroxycyclohexyl phenyl ketone, and stir for 20 min. Finally, 5 parts by weight of double-shell hollow nanosphere particles composed of silicon dioxide and titanium dioxide were added for 20 minutes of high-speed stirring and dispersion at a stirring speed of 1200 r / min.

[0083] Use a wire bar coater to coat the coating solution on one side of an optical-grade polytriacetate cellulose film (TAC film) with a thickness of 80 μm, dry it in an oven at 60 ° C for 3 min, and irradiate it with ultraviolet light to dry it. ...

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Abstract

The invention belongs to the technical field of thin films, and discloses an anti-ultraviolet hard coating film which is improved on the basis of the existing hard coating film with high definition, high hardness, wear resistance and low flash point, so that the hard coating film has an anti-ultraviolet effect. Comprising a transparent support body and an anti-ultraviolet anti-dazzle hardened layer coated on any surface of the transparent support body, and the anti-ultraviolet anti-dazzle hardened layer is formed by ultraviolet curing and drying of a coating liquid; the coating liquid is used for protecting the following substances in parts by weight: 10 to 35 parts of a modified polyurethane acrylate oligomer, 27 to 87.49 parts of an organic solvent, 0.01 to 3 parts of a flatting agent, 0.5 to 5 parts of a photoinitiator and 2 to 30 parts of double-shell hollow nanospheres. Compared with an organic ultraviolet absorbent, the excellent photoelectric property of nano-zinc oxide is utilized, so that the same ultraviolet absorption effect can be achieved, the mechanical property of the coating can be further improved, and meanwhile, the b * value of a hardened film cannot be changed.

Description

technical field [0001] The invention belongs to the technical field of thin film preparation, and in particular relates to an anti-ultraviolet hardening film. Background technique [0002] With the rapid development of the electronic information industry, various electronic terminals and electronic products are developing in the direction of multi-function and integration, and the environment of use is also diverse, which brings great convenience to people's work and life. , also affected the use effect due to the restrictions of various environments. In these environments, it is no longer just to solve the problem of "glare" by anti-glare, improving clarity, improving flash point, etc., but also needs to consider issues such as weather resistance, extended service life, and better mechanical properties. [0003] On display terminals such as outdoors and vehicles, the probability of being exposed to ultraviolet radiation is more frequent than indoors, and the existence of u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D5/32C09D7/61
CPCC09D175/14C09D5/32C09D7/61C09D7/70C08K2003/2296C08K2201/011C08K9/08C08K3/22C08K7/26C08K7/24
Inventor 韩捷王巧李恒郑子银周迪倪亮亮
Owner HEFEI LUCKY SCI & TECH IND
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