PC resin material, and preparation method therefor and use thereof

Abstract

A PC resin material, and a preparation method therefor and the use thereof. The PC resin material comprises 80-120 parts of a polycarbonate, 0.2-0.8 parts of a colorant, and 0.05-0.5 parts of a dispersant, and can effectively isolate ultraviolet and blue light. The preparation method comprises: mixing raw materials in a mixer until uniform, putting the uniformly mixed materials into a twin-screw extruder for extrusion and granulation, and cooling same to obtain a PC resin material. The PC resin material is used for manufacturing a transparent ultraviolet-shielding device.

Description

A PC resin material, its preparation method and application Technical Field

[0001] This invention belongs to the field of plastic products, specifically relating to a PC resin material, its preparation method, and its application. Background Technology

[0002] Ultraviolet (UV) radiation refers to the electromagnetic spectrum with frequencies ranging from 750 THz to 30 PHz, corresponding to wavelengths of 400 nm to 10 nm in a vacuum. UV radiation is invisible and has a higher frequency than blue-violet light. Excessive exposure to UV radiation can harm the human body, including skin damage and eye injury. Prolonged exposure to high doses of UV radiation can accelerate skin aging and may cause symptoms such as redness, pain, itching, and peeling, and may even induce skin cancer. Resin materials with UV-shielding properties can be used to protect the skin from UV damage.

[0003] Ultraviolet (UV) radiation plays a crucial role in chip manufacturing, particularly in the photolithography process. Photolithography is a key step in semiconductor manufacturing, used to create various intricate device patterns on silicon wafers. However, in other chip manufacturing processes, there are stages where UV shielding is necessary. These stages typically involve the handling of chip materials or specific process steps to prevent UV radiation from adversely affecting the chip's performance or structure, ensuring process precision and material stability.

[0004] 1. Photoresist Coating and Pre-exposure Treatment: After the photoresist is coated onto the silicon wafer, and before exposure, ultraviolet (UV) radiation must be avoided. This is because the photoresist itself is sensitive to UV radiation; premature or unnecessary UV exposure may cause pre-exposure of the photoresist, thereby affecting the subsequent exposure effect and pattern accuracy.

[0005] 2. Manufacturing of Sensitive Electronic Components: When manufacturing certain ultraviolet-sensitive electronic components (such as some sensors or transistors), ultraviolet radiation exposure must be strictly controlled. The performance of these components may be affected by ultraviolet radiation, leading to performance degradation or failure.

[0006] 3. Chip Packaging Stage: During the chip packaging process, some packaging materials may be sensitive to ultraviolet (UV) radiation. Therefore, shielding measures are also necessary at this stage to prevent UV radiation from adversely affecting the packaging materials.

[0007] Chinese patent application CN 105693079A discloses a method for preparing a green colorant and ultraviolet-shielding green glass, specifically disclosing a Cr-containing... 3+The silica sand only provides shielding in the 300nm-400nm ultraviolet band. However, the shielding range for ultraviolet light in this application is relatively narrow, and it does not take into account the transmittance in the wavelength range above 400nm, with a transmittance of less than 80% in the visible light region. Compared with plastics, the glass produced by this application is brittle and heavy, making it unsuitable for applications in skin protection and chip manufacturing.

[0008] Meanwhile, research has found that blue light in the 400-455 nanometer range is harmful to the human body. This portion of blue light is called short-wavelength blue light, and due to its high energy, it can even be used in insecticidal lamps. Cell experiments have shown that blue light in the 415-455 nanometer range is the most harmful. Short-wavelength blue light can cause photochemical damage to the retinal pigment epithelium. Many animal models, such as mice, rats, and rhesus monkeys, have confirmed that short-term, high-dose exposure to blue light causes photochemical damage to the retina. The photochemical disease of the human retina is age-related macular degeneration, and current research demonstrates that short-wavelength blue light is a risk factor for both age-related macular degeneration and choroidal melanoma.

[0009] In summary, existing technologies have a small shielding area for the ultraviolet band, which cannot meet the growing demand for ultraviolet shielding range in optical devices. Furthermore, existing technologies do not provide a PC resin material that can shield both ultraviolet light and blue light over a wide band.

[0010] Summary of the Invention

[0011] The purpose of this invention is to solve the above-mentioned technical problems and provide a PC resin material that can effectively block ultraviolet and blue light, with complete absorption of the transmittance curve in the 200-520nm spectral band, transmittance ≥80% above 580nm and haze ≤1%.

[0012] Another object of the present invention is to provide a method for preparing the above-mentioned PC resin material.

[0013] Another object of the present invention is to provide applications of the above-mentioned PC resin material.

[0014] This invention is achieved through the following technical solution:

[0015] A PC resin material, by weight, contains the following components:

[0016] 80-120 parts polycarbonate;

[0017] Colorant 0.2-0.8 parts;

[0018] Dispersant 0.05-0.5 parts;

[0019] The structure of the colorant is as follows:

[0020] .

[0021] Those skilled in the art can choose whether to add 0.05-0.5 parts of antioxidant according to actual needs.

[0022] The antioxidant is selected from any one or more of hindered phenols, phosphites, sulfur-containing compounds, or amines.

[0023] The dispersant is selected from any one or more of sodium dodecyl sulfate, methylpentanol, polyacrylamide, cellulose derivatives, ethylene bis-stearamide, stearate, guru gum, or fatty acid polyethylene glycol esters; preferably stearate, and the stearate is preferably pentaerythritol tetrastearate.

[0024] Preferably, the weight ratio of the colorant to the dispersant is (2-5):(2-5).

[0025] Preferably, the polycarbonate has a melt index of 10~30 g / 10min at a temperature of 300℃ and a load of 1.2 kg, and a transmittance of not less than 88% at a thickness of 2 mm according to ISO 13468-2-1999 standard.

[0026] Preferably, the polycarbonate has a transmittance of 90%-93% at a thickness of 2 mm, in accordance with ISO 13468-2-1999 standard.

[0027] The preferred polycarbonate type for achieving the purpose of this invention is bisphenol A.

[0028] This invention provides a method for preparing the aforementioned PC resin material.

[0029] S1: Weigh the raw materials according to the proportions;

[0030] S2: Mix the raw materials of each component in a mixer for 3-5 minutes to obtain a homogeneous material;

[0031] S3: The mixed material is fed into a twin-screw extruder, and after mixing, melting, homogenizing, extrusion granulation, and cooling, PC material is obtained;

[0032] Preferably, the twin-screw extruder has an extrusion screw length-to-diameter ratio of 40~65:1, an extruder barrel temperature of 260~290℃, and a main extruder speed of 600~900 r / min.

[0033] The present invention also provides an application of the above-mentioned PC resin material in the manufacture of a transparent ultraviolet shielding device.

[0034] Preferably, the transparent ultraviolet shielding device is a wafer box, a photomask box, or blue light blocking goggles.

[0035] The present invention has the following beneficial effects:

[0036] The colorant added in this application contains nitrogen-nitrogen double bonds, and its ultraviolet absorption peak is mainly in the range of 180-300 nm, which can efficiently absorb ultraviolet light. At the same time, the colorant molecule has a wide range of shielding wavelengths, which may be related to its nitrogen-nitrogen double bonds and the trifluoromethyl and cyano groups present on the two aromatic hydrocarbons conjugated with the azo double bonds.

[0037] This invention, by adding specific colorants, produces PC materials with optical effects such as complete absorption of the transmittance curve in the 200-520nm spectral range, transmittance ≥80% above 580nm, and haze ≤5%. Traditional UV-shielding plastics are opaque materials such as black or white, while the PC material prepared by this invention is a transparent UV-shielding material. Furthermore, the PC resin material provided by this invention can also block blue light while shielding UV light. The PC resin material provided by this invention has advantages such as aesthetic appearance, simple molding, high efficiency, and low cost. Detailed Implementation

[0038] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention. These all fall within the scope of protection of the present invention.

[0039] The raw materials used in this invention are sourced from the following sources:

[0040] Polycarbonate 1: PC CLS3400, with a transmittance of 14 g / 10min at 300℃ and a load of 1.2 kg, according to ISO 13468-2-1999 standard, a transmittance of 91% at a thickness of 2 mm, and a haze of <0.8% according to ISO 14782 standard, Mitsubishi, Japan.

[0041] Polycarbonate 2: CH 8155, at a temperature of 300℃ and a load of 1.2 kg, has a transmittance of 15 g / 10 min, according to ISO 13468-2-1999 standard, with a thickness of 2 mm and a haze of <0.8% according to ISO 14782 standard. Cangzhou Dahua.

[0042] Polycarbonate 3: CH 8225, with a transmittance of 22 g / 10min at 300℃ and a load of 1.2 kg, according to ISO 13468-2-1999, has a transmittance of 89% at a thickness of 2 mm, and a haze of <0.8% according to ISO 14782. Cangzhou Dahua.

[0043] Antioxidant 1: Phosphite antioxidant, Antioxidant 168, Tianjin Lianlong New Material Co., Ltd.

[0044] Antioxidant 2: Hindered phenolic antioxidant, Antioxidant 1076, Tianjin Lianlong New Material Co., Ltd.

[0045] Colorant 1: Solvent Orange 116, Taiyang Chemical.

[0046] Colorant 2: Solvent Red 195, Ningbo Longxin.

[0047] Colorant 3: Solvent Red 225, Lanxess, Germany.

[0048] Colorant 4: Solvent Red 179, Ningbo Longxin.

[0049] Colorant 5: Solvent Orange 60, Lanxess, Germany.

[0050] Colorant 6: Solvent Orange 63, Lanxess, Germany.

[0051] Colorant 7: Solvent Red 196, Lanxess, Germany.

[0052] Dispersant 1: Stearate, GLYCOLUBE-P, from Lonza, USA.

[0053] Dispersant 2: Sodium dodecyl sulfate, Kao Corporation, Japan.

[0054] Dispersant 3: Polyacrylamide, Mitsui, Japan.

[0055] Dispersant 4: Ethylene bis-stearamide, Lonza, USA.

[0056] Dispersant 5: Fatty acid polyethylene glycol ester, Nippon Oils & Fats Co., Ltd.

[0057] Preparation method of PC resin material in the examples and comparative examples: Raw materials were weighed according to the formula; the raw materials of each component were mixed evenly in a mixer to obtain a homogeneous material; the homogeneous material was fed into a twin-screw extruder, and after mixing, melting, homogenizing, extrusion granulation, and cooling, PC material was obtained; the length-to-diameter ratio of the extrusion screw of the twin-screw extruder was 40:1, and the temperature zones of the twin-screw extruder were set as follows: Zone 1 temperature 245~255℃, Zone 2 temperature 250~260℃, Zone 3 temperature 245~255℃, Zone 4 temperature 250~260℃, Zone 5 temperature 250~260℃, Zone 6 temperature 255~265℃, Zone 7 temperature 255~265℃, Zone 8 temperature 260~270℃, Zone 9 temperature 260~270℃, and the screw speed of the twin-screw extruder was 600 rpm.

[0058] Test method:

[0059] (1) Transmittance of light at different wavelengths: The transmittance of the injection-molded sample was tested using a UV-Vis-NIR spectrophotometer of model LAMBDA 1050+ by PERKINELMER of the United States. (2) The haze of the sample was tested using a haze meter of model NDH 7000 by NIPPON DENSHOKU of Japan.

[0060] Table 1. Weight parts and test results of each component of PC resin material in Examples 1-11

[0061] Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Example 10 Example 11 Polycarbonate 180 120 100 100 100 100 100 100 110 Polycarbonate 2 100 Polycarbonate 3 100 Colorant 10.2 0.5 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Dispersant 10.2 0.2 0.2 0.5 0.1 0.2 0.2 Dispersant 20.2 Dispersant 3 0.2 Dispersant 4 0.2 Dispersant 5 0.2 Antioxidant 10.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Antioxidant 20.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1

[0062] Table 2. Weight parts and test results of each component of PC resin materials in Comparative Examples 1-10

[0063] Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Comparative Example 9 Comparative Example 10 Polycarbonate 1100100100100100100100100100 Dispersant 10.20.20.20.20.20.20.20.21.0 Colorant 10.10.20.2 Colorant 20.2 Colorant 30.2 Colorant 40.2 Colorant 50.2 Colorant 60.2 Colorant 70.2 Antioxidant 10.10.10.10.10.10.10.10.10.10.1 Antioxidant 20.10.10.10.10.10.10.10.10.10.10.10.10.10.1

[0064] Table 3. Transmittance (200-900nm) and haze (380-780nm) data for Examples 1-11

[0065]

[0066] As can be seen from Examples 1-11, the PC resin material provided by the present invention has a transmittance of 0 in the range of 200-520nm, achieving complete absorption in this wavelength range; the transmittance above 580nm is ≥80% and the haze is ≤1%. The PC resin material provided by the present invention can effectively block ultraviolet and blue light.

[0067] Table 4. Transmittance (200-900 nm) and haze (380-780 nm) data for Comparative Examples 1-10

[0068]

[0069] As can be seen from Comparative Example 1, when the amount of colorant added is 0.1 parts, the lower limit of the amount of colorant added is not reached. The PC resin material prepared with this amount of colorant has a transmittance of 8.9% at 520nm and a transmittance of 1.3% at 380nm, which cannot achieve the technical effect of 0 transmittance from 200 to 520nm.

[0070] Comparative Examples 2-7 were supplemented with corresponding colorants 2-7. Experimental results show that, within the wavelength range of 200-520 nm, none of Comparative Examples 2-7 achieved a transmittance of 0, while the haze of Comparative Examples 3-5 and 7 was greater than 1. Colorants 2 and 3 are both azo colorants, demonstrating that simply containing nitrogen-nitrogen double bonds is not sufficient to achieve the technical effects of this invention.

[0071] Comparative Example 8, without any added colorant, exhibited ultraviolet light transmission starting at a wavelength of 300 nm, and could not achieve a transmittance of 0 in the 200-520 nm range.

[0072] Comparative Example 9, without the addition of a dispersant, exhibited some transmittance between wavelengths of 360-400 nm, and the transmittance reached 3% at a wavelength of 520 nm.

[0073] The amount of dispersant added in Comparative Example 10 was 1.0 part, which exceeded the upper limit of 0.5 parts. Although this comparative example achieved the effect of 0 transmittance in the wavelength range of 200-520nm, the haze in the wavelength range of 380-780nm exceeded 1%.

Claims

1. A PC resin material, characterized in that, Based on parts by weight, it contains the following ingredients: 80-120 parts polycarbonate; Colorant 0.2-0.8 parts; Dispersant 0.05-0.5 parts; The structure of the colorant is as follows: 。 2. The PC resin material according to claim 1, characterized in that, It also includes 0.05-0.5 parts by weight of antioxidants.

3. The PC resin material according to claim 2, characterized in that, The antioxidant is selected from any one or more of hindered phenols, phosphites, sulfur-containing compounds, or amines.

4. The PC resin material according to claim 1, characterized in that, The dispersant is selected from any one or more of sodium dodecyl sulfate, methylpentanol, polyacrylamide, cellulose derivatives, ethylene bis-stearamide, stearate, guru gum, or fatty acid polyethylene glycol esters, preferably stearate.

5. The PC resin material according to claim 1, characterized in that, The weight ratio of the colorant to the dispersant is (2-5):(2-5).

6. The PC resin material according to claim 1, characterized in that, The polycarbonate has a melt index of 10~30 g / 10min at a temperature of 300℃ and a load of 1.2 kg, and a transmittance of not less than 88% at a thickness of 2 mm according to ISO 13468-2-1999 standard.

7. A PC resin material according to claim 6, characterized in that, The polycarbonate, conforming to ISO 13468-2-1999 standard, has a transmittance of 90%-93% at a thickness of 2 mm.

8. A method for preparing a PC resin material according to any one of claims 1-8, characterized in that, S1: Weigh the raw materials according to the proportions; S2: Mix the raw materials of each component evenly in the mixer to obtain a homogeneous material; S3: The mixed material is fed into a twin-screw extruder, and after mixing, melting, homogenization, extrusion granulation, and cooling, PC resin material is obtained.

9. The application of a PC resin material according to any one of claims 1-7, characterized in that, It is used in the manufacture of transparent ultraviolet shielding devices.

10. The application of a PC resin material according to claim 9, characterized in that, The transparent ultraviolet shielding device includes a wafer box, a photomask box, and blue light blocking goggles.

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