UV (ultraviolet) penetration-increasing and reflection-reducing material for optical polyester film and preparation method of UV penetration-increasing and reflection-reducing material

Abstract

The invention discloses a UV-type penetration-increasing and reflection-reducing material for an optical polyester film and a preparation method of the UV-type penetration-increasing and reflection-reducing material. The UV type penetration-increasing and reflection-reducing material is prepared from the following components in parts by weight: 20 to 40 parts of UV type silicon-fluorine modified acrylic resin, 20 to 35 parts of UV type epoxy modified acrylic resin, 10 to 70 parts of nanoscale hollow silicon oxide spheres, 2 to 5 parts of free radical photoinitiator and 1 to 3 parts of polyether modified polydimethylsiloxane solution containing hydroxyl functional groups. According to the UV-type penetration-increasing and reflection-reducing material for the optical polyester film, the penetration rate can be effectively increased, the reflection rate can be effectively reduced on the polyester film, the refractive index is low, the adhesive force is excellent, the hardness is high, the scratch resistance and the wear resistance are excellent, and the water drop angle can be effectively increased.

Description

Technical Field

[0001] The invention relates to the technical field of polyester films, and in particular to a UV type penetration-enhancing and reflection-reducing material for optical polyester films and a preparation method thereof. Background Art

[0002] At present, sputtering is generally used to increase the penetration and reduce the reflection of polyester film. By depositing one or more layers of materials with a specific refractive index, interference occurs between the incident light and the reflected light, thereby reducing the reflectivity. By controlling the thickness of each layer and the design of the refractive index of the material, the reflectivity of light of a specific wavelength on the surface of the optical device can be made close to zero. Sputtering equipment is complex, the film formation speed is low, it is easily affected by impurity gases, and it consumes a lot of energy. Summary of the invention

[0003] The purpose of the present invention is to provide a UV type transmittance-enhancing and reflectance-reducing material and a preparation method for optical polyester film suitable for coating equipment in order to achieve the transmittance and low reflectivity of the existing high-transmittance polyester film while increasing production capacity and reducing energy consumption.

[0004] The technical solution of the present invention is as follows:

[0005] A UV type penetration-enhancing and reflection-reducing material for optical polyester films, comprising the following components: 20-40 parts by weight of UV type silicon-fluorine-modified acrylic resin, 20-35 parts by weight of UV type epoxy-modified acrylic resin, 10-70 parts by weight of nano-scale hollow silica spheres, 2-5 parts by weight of free radical photoinitiator, and 1-3 parts by weight of polyether-modified polydimethylsiloxane solution containing hydroxyl functional groups.

[0006] A method for preparing an optical polyester film UV type transmission enhancement and reflection reduction material, comprising the following steps:

[0007] a. At room temperature, add 20-40 parts by weight of UV-type silicone-fluorine-modified acrylic resin to the mixer;

[0008] b. Add 20-35 parts by weight of UV epoxy-modified acrylic resin to the mixer and stir to disperse;

[0009] c. Add 1-3 parts by weight of a polyether-modified hydroxyl-functional polydimethylsiloxane solution to a blender and stir to disperse;

[0010] d. Add 10-70 parts by weight of nano hollow silica balls to the mixer and stir to disperse;

[0011] e. Add 2-5 parts by weight of free radical photoinitiator into the mixer and stir to disperse.

[0012] In step b, the speed of the stirrer is increased to 400-600 r / min, and UV epoxy modified acrylic resin is added, and the stirring time is 5-10 min.

[0013] In step c, the rotation speed of the stirrer is 400-600 r / min, and the stirring time is 5 min.

[0014] In step d, the speed of the stirrer is increased to 1200-1500 r / min, and then nano-scale hollow silica balls are added, and the stirring time is 15-20 minutes.

[0015] In step e, the speed of the stirrer is reduced to 400-600 r / min, and then a free radical photoinitiator is added, and the stirring time is 5-8 min.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the UV type transmission-enhancing and reflection-reducing material for optical polyester film provided by the present invention is composed of UV type silicone-fluorine modified acrylic resin, UV type epoxy modified acrylic resin, nanometer-scale hollow silica balls, free radical photoinitiator, and polyether-modified polydimethylsiloxane solution containing hydroxyl functional groups, so that the material can effectively improve the transmittance and reduce the reflectivity on the polyester film; wherein the UV type silicone-fluorine modified acrylic resin is a resin with low refractive index and excellent adhesion to the polyester film; the UV type epoxy modified acrylic resin has high hardness, excellent scratch resistance and wear resistance; the nanometer-scale hollow silica balls are the main material for transmission-enhancing and reflection-reducing in the material; the free radical photoinitiator reacts quickly under the illumination of a mercury lamp or an LED to form a uniform and dense coating; the polyether-modified polydimethylsilane containing hydroxyl functional groups can effectively increase the appearance effects such as leveling and keyhole after the material is coated, and effectively increase the water drop angle. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] In order to illustrate the technical solution of the present invention, a specific embodiment is provided below for illustration.

[0019] Embodiment 1

[0020] The present embodiment provides a UV type transmission-enhancing and reflection-reducing material for optical polyester films, which is composed of the following components: 20-40 parts by weight of UV type silicone-fluorine-modified acrylic resin, 20-35 parts by weight of UV type epoxy-modified acrylic resin, 30-50 parts by weight of nano-scale hollow silica spheres, 2-5 parts by weight of free radical photoinitiator, and 1-3 parts by weight of polyether-modified polydimethylsiloxane solution containing hydroxyl functional groups.

[0021] The preparation method thereof comprises the following steps:

[0022] a. At room temperature, add 20-40 parts by weight of UV-type silicone-fluorine-modified acrylic resin to the mixer;

[0023] b. Increase the speed of the mixer to 400-600r / min, add 20-35 parts by weight of UV epoxy-modified acrylic resin to the mixer, stir and disperse, and the stirring time is 5-10min;

[0024] c. Keep the stirrer speed constant, add 1-3 parts by weight of a polyether-modified hydroxyl-functional polydimethylsiloxane solution to the stirrer, stir and disperse, and the stirring time is 5 min;

[0025] d. Increase the speed of the mixer to 1200-1500r / min, add 30-50 parts by weight of nano-scale hollow silica balls to the mixer, stir and disperse, and the stirring time is 15-20min;

[0026] e. Reduce the speed of the mixer to 400-600r / min, add 2-5 parts by weight of free radical photoinitiator into the mixer, stir and disperse, and the stirring time is 5-8min.

[0027] Embodiment 2

[0028] The present embodiment provides a UV type transmission-enhancing and reflection-reducing material for optical polyester films, which is composed of the following components: 20-40 parts by weight of UV type silicone-fluorine-modified acrylic resin, 20-35 parts by weight of UV type epoxy-modified acrylic resin, 10-20 parts by weight of nano-scale hollow silica spheres, 2-5 parts by weight of free radical photoinitiator, and 1-3 parts by weight of polyether-modified polydimethylsiloxane solution containing hydroxyl functional groups.

[0029] The preparation method thereof comprises the following steps:

[0030] a. At room temperature, add 20-40 parts by weight of UV-type silicone-fluorine-modified acrylic resin to the mixer;

[0031] b. Increase the speed of the mixer to 400-600r / min, add 20-35 parts by weight of UV epoxy-modified acrylic resin to the mixer, stir and disperse, and the stirring time is 5-10min;

[0032] c. Keep the stirrer speed constant, add 1-3 parts by weight of a polyether-modified hydroxyl-functional polydimethylsiloxane solution to the stirrer, stir and disperse, and the stirring time is 5 min;

[0033] d. Increase the speed of the mixer to 1200-1500r / min, add 10-20 parts by weight of nano-scale hollow silica balls to the mixer, stir and disperse, and the stirring time is 15-20min;

[0034] e. Reduce the speed of the mixer to 400-600r / min, add 2-5 parts by weight of free radical photoinitiator into the mixer, stir and disperse, and the stirring time is 5-8min.

[0035] Embodiment 2

[0036] The present embodiment provides a UV type transmission-enhancing and reflection-reducing material for optical polyester films, which is composed of the following components: 20-40 parts by weight of UV type silicone-fluorine-modified acrylic resin, 20-35 parts by weight of UV type epoxy-modified acrylic resin, 50-70 parts by weight of nano-scale hollow silica spheres, 2-5 parts by weight of free radical photoinitiator, and 1-3 parts by weight of polyether-modified polydimethylsiloxane solution containing hydroxyl functional groups.

[0037] The preparation method thereof comprises the following steps:

[0038] a. At room temperature, add 20-40 parts by weight of UV-type silicone-fluorine-modified acrylic resin to the mixer;

[0039] b. Increase the speed of the mixer to 400-600r / min, add 20-35 parts by weight of UV epoxy-modified acrylic resin to the mixer, stir and disperse, and the stirring time is 5-10min;

[0040] c. Keep the stirrer speed constant, add 1-3 parts by weight of a polyether-modified hydroxyl-functional polydimethylsiloxane solution to the stirrer, stir and disperse, and the stirring time is 5 min;

[0041] d. Increase the speed of the mixer to 1200-1500r / min, add 50-70 parts by weight of nano-scale hollow silica balls to the mixer, stir and disperse, and the stirring time is 15-20min;

[0042] e. Reduce the speed of the mixer to 400-600r / min, add 2-5 parts by weight of free radical photoinitiator into the mixer, stir and disperse, and the stirring time is 5-8min.

[0043] Solutions were prepared according to the above-mentioned Examples 1 to 3, and coatings were prepared on optical polyester films, and their performance was tested;

[0044]

[0045] In the above list, the thickness refers to the thickness of optical grade polyester film; the haze is the percentage of the transmitted light intensity that deviates from the incident light by more than 2.5° to the total transmitted light intensity; the transmittance refers to the ratio of the radiant energy projected and transmitted through the object to the total radiant energy projected onto the object in the process of the incident light flux leaving from the illuminated surface or the incident surface of the medium to the other side; the L value indicates the brightness of the color, the a value indicates the green-red value of the color, and the b value indicates the blue-yellow value of the color; the reflectivity is the percentage of the radiant energy reflected by the object to the total radiant energy; the water drop angle is defined as the angle between the gas-liquid interface and the solid-liquid interface at the interface of solid, liquid and gas. The water drop angle is a scale that shows the humidity of the solid surface.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A UV type penetration enhancement and reflection reduction material for optical polyester film, characterized in that: The invention is composed of the following components: 20-40 parts by weight of UV type silicone-fluorine modified acrylic resin, 20-35 parts by weight of UV type epoxy modified acrylic resin, 10-70 parts by weight of nanometer hollow silica spheres, 2-5 parts by weight of free radical photoinitiator, and 1-3 parts by weight of polyether modified polydimethylsiloxane solution containing hydroxyl functional groups.

2. A method for preparing a UV type transmittance-enhancing and reflection-reducing material for optical polyester film according to claim 1, comprising the following steps: a. At room temperature, add 20-40 parts by weight of UV-type silicone-fluorine-modified acrylic resin to the mixer; b. Add 20-35 parts by weight of UV epoxy-modified acrylic resin to the mixer and stir to disperse; c. Add 1-3 parts by weight of a polyether-modified hydroxyl-functional polydimethylsiloxane solution to a blender and stir to disperse; d. Add 10-70 parts by weight of nano hollow silica balls to the mixer and stir to disperse; e. Add 2-5 parts by weight of free radical photoinitiator into the mixer and stir to disperse.

3. The method for preparing the UV type transmittance enhancement and reflection reduction material for optical polyester film according to claim 1, characterized in that: In step b, the speed of the stirrer is increased to 400-600 r / min, and UV epoxy modified acrylic resin is added, and the stirring time is 5-10 min.

4. The method for preparing the optical polyester film UV type transmission enhancement and reflection reduction material according to claim 1, characterized in that: In step c, the rotation speed of the stirrer is 400-600 r / min, and the stirring time is 5 min.

5. The method for preparing the optical polyester film UV type transmission enhancement and reflection reduction material according to claim 1, characterized in that: In step d, the speed of the stirrer is increased to 1200-1500 r / min, and then nano-scale hollow silica balls are added, and the stirring time is 15-20 minutes.

6. The method for preparing the optical polyester film UV type transmission enhancement and reflection reduction material according to claim 1, characterized in that: In step e, the speed of the stirrer is reduced to 400-600 r / min, and then a free radical photoinitiator is added, and the stirring time is 5-8 min.

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