Polycarbonate composite material as well as preparation method and application thereof

Abstract

The invention discloses a polycarbonate composite material which comprises the following components in parts by weight: 98.7-99.4 parts of polycarbonate; 0.1 to 0.3 part of a nickel dithio complex; and 0.1 to 0.6 part of a phenyl phosphorus compound. According to the polycarbonate composite material and the preparation method thereof, good infrared absorption cutoff performance is obtained by introducing the nickel dithiocomplex and the phenyl phosphorus compound, and the polycarbonate composite material disclosed by the invention integrates extrusion integral molding and optical performance and is suitable for preparing laser protective glasses.

Description

Technical Field

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

[0002] The principle of laser protective glasses is mainly based on spectral selective absorption and selective reflection technology. This protection mechanism ensures that the eyes are protected from damage when using laser equipment while maintaining the necessary visual function. Spectral selective absorption is achieved by adding infrared absorbers to the substrate, while selective reflective technology is achieved through coating technology. The advantages of absorptive laser protective glasses mainly include: long-term effectiveness, and the coating may fail with time and 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 dyes required for absorptive protective glasses are often designed into a strong conjugated structure in order to enhance the absorption of infrared light. This complex structure can easily lead to its easy decomposition at high temperatures. Laser protective glasses are mainly made of engineering plastics such as polycarbonate, and the processing temperature is between 260 and 300 ° C, so infrared absorbers with thermal stability in PC materials are an industry problem.

[0003] The common practice in the industry to address this problem is to optimize the molecular design of infrared absorbers, such as introducing stable functional groups or adding protective groups, but the molecular control technology is quite complicated and often affects its infrared absorption performance. There are also related literatures that form a protective layer by encapsulating the infrared absorber in a stable polymer or inorganic material, but the coating layer will have an adverse effect on the transparency of the material due to the difference in refractive index with PC, or the infrared absorber is made into a polymer through polymerization technology, but the degree of polymerization of the polymer is often difficult to control, resulting in uncertainty in the absorption efficiency. Summary of the invention

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

[0005] The present invention is achieved through the following technical solutions: A polycarbonate composite material, comprising the following components in parts by weight: Polycarbonate 98.7-99.4 parts; 0.1-0.3 parts of nickel disulfide complex; 0.1-0.6 parts of phenyl phosphorus compounds.

[0006] The nickel disulfide complex is

[0007] R is the following group: .

[0008] In the polycarbonate composite material of the present invention, the content of polycarbonate 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 disulfide nickel complex can be 0.1 parts, 0.15 parts, 0.20 parts, 0.25 parts, 0.30 parts, etc., and the content of phenyl phosphorus compound can be 0.1 parts, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, etc.

[0009] The phenylphosphine compound is selected from at least one of triphenylphosphine and tri-o-tolylphosphine.

[0010] The polycarbonate is an optical polycarbonate with a light transmittance of more than 90%. The melt index may be 7-18 g / 10 min, measured at 300° C., 1.2 kg, and ASTM D-1238. The polycarbonate is preferably bisphenol A polycarbonate.

[0011] In order to further improve the near-infrared absorption performance, 0-0.3 parts by weight of carboxyl-terminated hyperbranched polyester may be added.

[0012] 0-1 part of auxiliary agent can be added according to actual needs; the auxiliary agent is selected from at least one of an antioxidant and a lubricant.

[0013] The antioxidant may be a mixture of antioxidant 1010 and antioxidant 168, and the weight ratio may be 1:(0.5-1.5).

[0014] The lubricant can be: pentaerythritol stearate, ethylene bisstearamide, calcium stearate, etc.

[0015] The preparation method of the polycarbonate composite material of the present invention comprises the following steps: mixing the components uniformly according to the proportion, extruding and granulating through a twin-screw extruder to obtain the polycarbonate composite material, and the screw barrel temperature range is 270-290°C.

[0016] The polycarbonate composite material of the present invention is used for preparing laser protective glasses.

[0017] The present invention has the following beneficial effects: The invention can significantly improve the damage to the nickel disulfide complex during the melting and shearing process by selecting the phenylphosphine compound, thereby ensuring the infrared absorption performance. Meanwhile, the addition of the phenylphosphine compound does not increase the haze of the material, thereby maintaining high transparency. DETAILED DESCRIPTION

[0018] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0019] The sources of raw materials used in the embodiments and comparative examples are as follows: Polycarbonate A: Mitsubishi, brand CLS400; Polycarbonate B: Mitsubishi, Japan, brand S1000R; Nickel disulfide complex: purchased from Epolin, USA; Triphenylphosphine: purchased from Aladdin; Tri-o-tolylphosphine: purchased from Aladdin; Phosphate ester: Irganox 168; Carboxyl-terminated hyperbranched polyester A: Hyper C100, Wuhan Hyperbranched Resin Technology Co., Ltd.; Carboxyl-terminated hyperbranched polyester B: HyPer C201, Wuhan Hyperbranched Resin Technology Co., Ltd.; Hydroxyl-terminated hyperbranched polyester: HyPer H301, Wuhan Hyperbranched Resin Technology Co., Ltd.; Antioxidants: Irganox 1010 and Irganox 168, mass ratio 1:1, purchased from Ciba; Lubricant: Pentaerythritol stearate, GLYCOLUBE-P; Embodiment and comparative example Preparation method of polycarbonate composite material: according to the ratio, each component is mixed evenly, and extruded and granulated by a twin-screw extruder to obtain a polycarbonate composite material, and the barrel temperature is 280°C.

[0020] Various test methods: (1) Avg.T: The polycarbonate composite material prepared in the present invention is 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 is 270-290°C. The transmittance of the color plate in a specific band is tested using a LAMBDA 1050+ of Platinum Elmer. The test is based on ISO 26723:2020.

[0021] (2) Haze: The polycarbonate composite material prepared in the present invention 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°C. The haze of the color plate was tested using a Platinum Elmer LAMBDA 1050+ tester in accordance with GB 2410-80 (89).

[0022] Table 1: Weight parts of each component of the polycarbonate composite material of the embodiment and test results 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 Nickel disulfide complex 0.1 0.2 0.3 0.2 0.2 0.2 0.2 0.2 Triphenylphosphine 0.1 0.2 0.6 0.2 0.2 0.2 0.2 tri-o-tolylphosphine 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 Antioxidants 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Lubricants 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(400~700nm) 33.1 31.5 28.9 31.7 30.8 32.4 33.6 31.8 Avg.T(800~1100nm) 6.77 3.58 2.83 3.78 3.09 3.37 3.23 3.51 It can be seen from the above embodiments that the Haze of the polycarbonate composite material of the present invention is lower than 1.1, and the visible light transmittance is greater than 28, and the near infrared transmittance is less than 7.

[0023] It can be seen from Examples 2 / 6 / 7 / 8 that the addition of carboxyl-terminated hyperbranched polyester can effectively reduce near-infrared transmittance and has little effect on Haze.

[0024] Table 2: Weight parts of each component of the comparative polycarbonate composite material and test results Comparative Example 1 Comparative Example 2 Comparative Example 3 Polycarbonate A 99 99 99.4 Nickel disulfide complex 0.2 0.2 0.3 Triphenylphosphine 0.8 Phosphate 0.2 Antioxidants 0.2 0.2 Lubricants 0.2 0.2 0.2 Haze 0.88 0.95 1.01 Avg.T(400~700nm) 22.2 24.7 28.5 Avg.T(800~1100nm) 48.7 43.9 2.86 It can be seen from Comparative Example 1 that when no phenylphosphine compound is contained, not only the visible light transmittance is reduced, but also the near infrared transmittance is very high. This is because the nickel disulfide complex is decomposed during the processing.

[0025] It can be seen from Comparative Example 2 that the phosphate esters commonly used as thermal stabilizers in the art cannot achieve the technical effects of phenylphosphine compounds.

[0026] It can be seen from Comparative Example 3 that when the content of triphenylphosphine exceeds 0.6 parts, the decrease in near-infrared transmittance is not obvious.

Claims

1. A polycarbonate composite material, characterized in that: By weight, it includes the following components: Polycarbonate 98.7-99.4 parts; 0.1-0.3 parts of nickel disulfide complex; 0.1-0.6 parts of phenyl phosphorus compounds.

2. The polycarbonate composite material according to claim 1, characterized in that: The nickel disulfide complex is ， R is the following group: 。 3. The polycarbonate composite material according to claim 1, characterized in that: The phenylphosphine compound is selected from at least one of triphenylphosphine and tri-o-tolylphosphine.

4. The polycarbonate composite material according to claim 1, characterized in that: The polycarbonate is optical polycarbonate with a light transmittance greater than 90%.

5. The polycarbonate composite material according to claim 1, characterized in that: By weight, 0-0.3 parts of terminal carboxyl hyperbranched polyester are also included.

6. The polycarbonate composite material according to claim 1, characterized in that: By weight, it also includes 0-1 part of auxiliary agent; the auxiliary agent is selected from at least one of antioxidants and lubricants.

7. The method for preparing the polycarbonate composite material according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: mixing the components uniformly according to the proportion, extruding and granulating through a twin-screw extruder to obtain a polycarbonate composite material.

8. Use of the polycarbonate composite material according to any one of claims 1 to 6, characterized in that: Used to prepare laser protective glasses.

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