A polycarbonate composite material, a preparation method and application thereof

Abstract

The application discloses a polycarbonate composite material, which comprises the following components in parts by weight: polycarbonate 98.7-99.4 parts; a dithio nickel complex 0.1-0.3 parts; and a phenyl phosphorus compound 0.1-0.6 parts. The polycarbonate composite material has good infrared absorption cutoff performance by introducing the dithio nickel complex and the phenyl phosphorus compound, and the polycarbonate composite material has the advantages of extrusion integrated molding and optical performance, and is suitable for preparing laser protection glasses.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high polymer materials, in particular to a polycarbonate composite material and a preparation method and application thereof. BACKGROUND

[0002] The principle of laser protective glasses is mainly based on spectral selective absorption and selective reflection technology. This protective mechanism ensures that the eyes are protected from injury when using laser equipment, while maintaining the necessary visual function. Spectral selective absorption is achieved by adding infrared absorbers to the substrate, while selective reflection technology is achieved by coating technology. The advantages of absorptive laser protective glasses mainly include: long-term effectiveness, coatings may fail over time and with wear. Light transmittance: absorptive glasses can provide good visible light transmittance while maintaining protection, while some coatings may affect the transmittance of visible light. However, the infrared absorbing dye required for absorptive protective glasses is often designed with a strong conjugated structure to enhance the absorption of infrared light. This complex structure is prone to decomposition at high temperatures. Laser protective lenses are mainly made of engineering plastics such as polycarbonate, with a processing temperature of 260-300℃. Therefore, infrared absorbers with thermal stability in PC materials are a major challenge in the industry.

[0003] To address this issue, the industry generally optimizes the molecular design of infrared absorbers, such as introducing stable functional groups or adding protective groups. However, molecular regulation techniques are complex and often affect the infrared absorption performance. Some related literature coats the infrared absorber in a stable polymer or inorganic material to form a protective layer. However, the coating layer may adversely affect the transparency of the material due to the difference in refractive index with PC. Alternatively, the infrared absorber can be made into a polymer through polymerization technology. However, the polymerization degree of the polymer is often difficult to control, resulting in uncertainty in absorption efficiency. SUMMARY

[0004] The present application aims to overcome the above technical defects and provide a polycarbonate composite material with good processing performance, high light transmittance, and good infrared absorption, as well as a preparation method and application thereof.

[0005] The present application is achieved by the following technical solutions:

[0006] A polycarbonate composite material, comprising the following components by weight:

[0007] Polycarbonate 98.7-99.4 parts;

[0008] Nickel dithiolate complex 0.1-0.3 parts;

[0009] Phenyl phosphorus compound 0.1-0.6 parts.

[0010] The dithio nickel complex is

[0011]

[0012] R is the following group:

[0013] .

[0014] The content of the polycarbonate in the polycarbonate composite material of the application can be 98.7 parts, 98.8 parts, 98.9 parts, 99.0 parts, 99.1 parts, 99.2 parts, 99.3 parts, 99.4 parts, etc., the content of the dithio nickel complex can be 0.1 part, 0.15 part, 0.20 part, 0.25 part, 0.30 part, etc., and the content of the phenyl phosphorus compound can be 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, etc.

[0015] The phenyl phosphorus compound is selected from at least one of triphenyl phosphorus and tri-o-tolyl phosphorus.

[0016] The polycarbonate is optical polycarbonate with a light transmittance > 90%. The melt index can be 7-18 g / 10 min, measured at 300℃, 1.2 KG, ASTM D-1238. The polycarbonate is preferably bisphenol A type polycarbonate.

[0017] In order to further improve the near-infrared absorption performance, 0-0.3 parts of carboxyl-terminated hyperbranched polyester can also be added by weight.

[0018] 0-1 parts of an auxiliary agent can be added according to actual needs; the auxiliary agent is selected from at least one of an antioxidant and a lubricant.

[0019] The antioxidant can be: antioxidant 1010, antioxidant 168 complex, and the weight ratio can be 1: (0.5-1.5).

[0020] The lubricant can be: pentaerythritol stearate, ethylene bis-stearamide, calcium stearate, etc.

[0021] The preparation method of the polycarbonate composite material of the application comprises the following steps: uniformly mixing the components according to the ratio, extruding and granulating through a double-screw extruder to obtain the polycarbonate composite material, and the screw cylinder temperature range is 270-290℃.

[0022] The polycarbonate composite material of the application is used for preparing laser protection goggles.

[0023] The application has the following beneficial effects:

[0024] The present application can significantly improve the damage to the dithio nickel complex in the melting and shearing process by selecting the phenyl phosphorus compound, and ensure the infrared absorption performance. Meanwhile, the addition of the phenyl phosphorus compound does not increase the haze of the material, and maintains high transparency. DETAILED DESCRIPTION

[0025] The present application will be described in detail below in conjunction with specific examples. The following examples will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be pointed out that, for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made. These all belong to the protection scope of the present application.

[0026] The raw materials used in the examples and comparative examples are as follows:

[0027] Polycarbonate A: Japan Mitsubishi, grade CLS400;

[0028] Polycarbonate B: Japan Mitsubishi, grade S1000R;

[0029] Dithio nickel complex: purchased from Epolin, USA;

[0030] Triphenyl phosphorus: purchased from Aldrich;

[0031] Tri-o-tolyl phosphine: purchased from Aldrich;

[0032] Phosphate: Irganox 168;

[0033] Carboxyl-terminated hyperbranched polyester A: Hyper C100, Wuhan Hyperbranched Resin Technology Co., Ltd.;

[0034] Carboxyl-terminated hyperbranched polyester B: HyPer C201, Wuhan Hyperbranched Resin Technology Co., Ltd.;

[0035] Hydroxyl-terminated hyperbranched polyester: HyPer H301, Wuhan Hyperbranched Resin Technology Co., Ltd.;

[0036] Antioxidant: Irganox 1010 and Irganox 168, mass ratio 1:1, purchased from Ciba Company;

[0037] Lubricant: pentaerythritol stearate, GLYCOLUBE-P;

[0038] Preparation method of polycarbonate composite material in examples and comparative examples: according to the proportion, mix each component uniformly, extrude and granulate through a double screw extruder, and obtain a polycarbonate composite material. The barrel temperature is 280℃.

[0039] Test methods:

[0040] (1) Avg.T: The polycarbonate composite prepared by the present application was injection molded into a color plate with a length of 10 cm, a width of 5 cm, and a thickness of 2 mm, the injection molding temperature was 270~290℃, the specific waveband transmittance of the color plate was tested, the test equipment was LAMBDA 1050+ of PerkinElmer, and the test was based on ISO 26723:2020.

[0041] (2) Haze: The polycarbonate composite prepared by the present application was injection molded into a color plate with a length of 10 cm, a width of 5 cm, and a thickness of 2 mm, the injection molding temperature was 270~290℃, the haze of the color plate was tested, the test equipment was LAMBDA 1050+ of PerkinElmer, and the test was based on GB 2410-80(89).

[0042] Table 1: Weight parts of each component of the polycarbonate composite of the examples and test results

[0043] Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Polycarbonate A 99 99.4 99 99 99 99 99 Polycarbonate B 98.7 Dithio nickel complex 0.1 0.2 0.3 0.2 0.2 0.2 0.2 0.2 Triphenyl phosphor 0.1 0.2 0.6 0.2 0.2 0.2 0.2 Triorthotolyl phosphor 0.2 0.2 Carboxyl-terminated hyperbranched polyester A 0.1 Carboxyl-terminated hyperbranched polyester B 0.3 Hydroxyl-terminated hyperbranched polyester C 0.1 Antioxidant 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Lubricant 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Haze 0.85 0.91 0.95 0.93 1.05 0.93 0.98 0.96 Avg. T (400-700 nm) 33.1 31.5 28.9 31.7 30.8 32.4 33.6 31.8 Avg. T (800-1100 nm) 6.77 3.58 2.83 3.78 3.09 3.37 3.23 3.51

[0044] From the above examples, it can be seen that the polycarbonate composite of the present application has a Haze less than 1.1, and a visible light transmittance greater than 28 and a near-infrared transmittance less than 7.

[0045] From examples 2 / 6 / 7 / 8, it can be seen that the addition of carboxyl-terminated hyperbranched polyester can effectively reduce the near-infrared transmittance and has little effect on Haze.

[0046] Table 2: Weight parts of each component of the polycarbonate composite of the comparative examples and test results

[0047] Comparative Example 1 Comparative Example 2 Comparative Example 3 Polycarbonate A 99 99 99.4 Dithio nickel complex 0.2 0.2 0.3 Triphenyl phosphor 0.8 Phosphate ester 0.2 Antioxidant 0.2 0.2 Lubricant 0.2 0.2 0.2 Haze 0.88 0.95 1.01 Avg. T (400-700 nm) 22.2 24.7 28.5 Avg. T (800-1100 nm) 48.7 43.9 2.86

[0048] From comparative example 1, it can be seen that when there is no phenyl phosphorus compound, not only the visible light transmittance is reduced, but also the near-infrared transmittance is very high, which is due to the decomposition of the dithio nickel complex during the processing.

[0049] From comparative example 2, it can be seen that the commonly used thermal stabilizer phosphate in the art cannot achieve the technical effect of the phenyl phosphorus compound.

[0050] From comparative example 3, it can be seen that when the content of triphenyl phosphorus exceeds 0.6 parts, the reduction of near-infrared transmittance is not obvious.

Claims

1. A polycarbonate composite material, characterized by, By weight parts, comprising the following components: Polycarbonate 98.7-99.4 parts; Nickel dithiolate complex 0.1-0.3 parts; Phenyl phosphorus compound 0.1-0.6 parts; The phenyl phosphorus compound is selected from at least one of triphenyl phosphorus, tri-o-tolyl phosphine; The nickel dithiolate complex is ， R is the following group: 。 2. The polycarbonate composite of claim 1, wherein, The polycarbonate is optical polycarbonate, light transmittance > 90%.

3. The polycarbonate composite of claim 1, wherein, By weight parts, further comprising 0-0.3 parts of carboxyl-terminated hyperbranched polyester.

4. The polycarbonate composite of claim 1, wherein, By weight parts, further comprising 0-1 parts of auxiliary agent; the auxiliary agent is selected from at least one of antioxidant, lubricant.

5. A process for the production of the polycarbonate composite material according to any one of claims 1 to 4, characterized in that, The method comprises the following steps: according to the proportion, mixing each component uniformly, and extruding and granulating through a double screw extruder to obtain a polycarbonate composite material.

6. Use of the polycarbonate composite material according to any one of claims 1 to 4, characterized in that For preparing laser protection glasses.

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