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A kind of UV resin composition, pdlc dimming film and preparation method thereof

A technology of resin composition and dimming film, applied in optics, nonlinear optics, instruments, etc., can solve the problem of high driving voltage of PDLC, achieve the effect of reducing driving voltage and ensuring safety

Active Publication Date: 2022-02-08
北京驳凡科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of high driving voltage required by the existing PDLC, the invention provides a UV resin composition, a PDLC dimming film and a preparation method thereof

Method used

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  • A kind of UV resin composition, pdlc dimming film and preparation method thereof
  • A kind of UV resin composition, pdlc dimming film and preparation method thereof
  • A kind of UV resin composition, pdlc dimming film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] This embodiment provides a UV resin composition and a preparation method thereof.

[0042] The UV resin composition of this example is prepared by stirring and mixing the components shown in Table 1 at normal temperature and pressure:

[0043] Table 1

[0044]

[0045]

[0046] The preparation method of the polyurethane acrylate prepolymer used in the present embodiment is as follows:

[0047] Mix and stir 0.5 mole of isophorone diisocyanate, 1.5 mole of hexamethylene diisocyanate, 1 mole of polyether diol and 0.001 mole of dibutyltin dilaurate, raise the temperature to 60°C for 5 hours, monitor the -NCO content, when- When the NCO content is 50%, add 2 moles of hydroxyethyl acrylate and 0.01 moles of 2,6-di-tert-butyl p-cresol to the reaction system in mole fractions sequentially, and continue the reaction until the -NCO content is less than 0.5%, and the condition of 50 ° C is obtained. Urethane acrylate prepolymer with a lower viscosity of 4500-5000cP.

Embodiment 2

[0049] This embodiment provides a UV resin composition and a preparation method thereof.

[0050] The UV resin composition of this embodiment is prepared by stirring and mixing the components shown in Table 2 at normal temperature and pressure:

[0051] Table 2

[0052]

[0053] The preparation method of the polyurethane acrylate prepolymer used in the present embodiment is as follows:

[0054] Mix and stir 1 mole of isophorone diisocyanate, 1 mole of hexamethylene diisocyanate, 1 mole of polyether diol and 0.001 mole of dibutyltin dilaurate, raise the temperature to 60°C for 5 hours, monitor the -NCO content, when- When the NCO content is 50%, add 0.5 mole of hydroxyethyl acrylate, 1.5 mole of hydroxypropyl acrylate and 0.01 mole of 2,6-di-tert-butyl p-cresol to the reaction system in mole fractions successively, and continue the reaction until the -NCO content is less than 0.5% to obtain a polyurethane acrylate prepolymer with a viscosity of 4500-5000 cP at 50°C.

Embodiment 3

[0056] This embodiment provides a UV resin composition and a preparation method thereof.

[0057] The UV resin composition of this example is prepared by stirring and mixing the components in parts by weight shown in Table 3 at normal temperature and pressure:

[0058] table 3

[0059]

[0060] The preparation method of the polyurethane acrylate prepolymer used in the present embodiment is as follows:

[0061] Mix and stir 1 mole of isophorone diisocyanate, 1 mole of hexamethylene diisocyanate, 1 mole of polyether diol and 0.001 mole of dibutyltin dilaurate, raise the temperature to 60°C for 5 hours, monitor the -NCO content, when- When the NCO content is 50%, add 2 moles of hydroxyethyl acrylate and 0.01 moles of 2,6-di-tert-butyl p-cresol to the reaction system in mole fractions sequentially, and continue the reaction until the -NCO content is less than 0.5%, and the condition of 50 ° C is obtained. Urethane acrylate prepolymer with a lower viscosity of 4500-5000cP.

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Abstract

The invention relates to a UV resin composition, a PDLC dimming film and a preparation method thereof, and belongs to the technical field of polymer dispersed liquid crystals. In order to solve the problem of high driving voltage required by existing PDLC dimming materials, the invention provides a UV resin composition, the components of which include polyurethane acrylate prepolymer, monomer diluent and photoinitiator. The PDLC dimming film is prepared by mixing the UV resin composition, the liquid crystal and the spacer, which can reduce the driving voltage when the PDLC changes from a haze state to a transparent state. The haze of the PDLC dimming film prepared by the present invention is greater than 90% in the state of no power supply; the haze can be less than 5% under the condition of 18V voltage, which not only significantly reduces the driving voltage of the PDLC dimming film, but also ensures the PDLC dimming. The safety of light film use.

Description

technical field [0001] The invention belongs to the technical field of polymer dispersed liquid crystals, and in particular relates to a UV resin composition, a PDLC dimming film and a preparation method thereof. Background technique [0002] Polymer dispersed liquid crystal, also known as PDLC (Polymer Dispersed Liquid Crystal), is a film material obtained by dispersing liquid crystals in micron-scale droplets in an organic solid polymer matrix. Since the optical axis of the small droplet composed of liquid crystal molecules is in a free orientation, its refractive index does not match that of the matrix. When the light passes through the matrix, it is strongly scattered by the droplet and presents an opaque milky white or translucent fog state. The optical axis orientation of the liquid crystal droplet can be adjusted by applying an electric field. When the refractive index of the liquid crystal droplet matches that of the substrate, the PDLC is in a transparent state. Wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/14C09D7/61C09D7/40G02F1/1334
CPCC09D175/14C09D7/61C09D7/40C09D7/70G02F1/1334C08K7/20
Inventor 丁兴立
Owner 北京驳凡科技有限公司