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Anti-scratching polypropylene material with ultraviolet aging resistance and preparation method thereof

A polypropylene material, anti-ultraviolet light technology, applied in the field of anti-ultraviolet light aging and anti-scratch polypropylene material and its preparation field, can solve the problem of surface hardness of the shielding ultraviolet light effect material, poor anti-scratch effect, affecting the scope of application, etc. problems, to achieve the effect of strong UV shielding performance, high retention rate of mechanical properties, and small degree of pulverization

Inactive Publication Date: 2017-11-24
GUANGDONG ALDEX NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN103059420A discloses a light aging resistant polypropylene material and its preparation method, which is prepared by adding benzophenone light stabilizer, benzotriazole light stabilizer or hindered amine light stabilizer and UV-531 light absorber The weather-resistant and aging-resistant polypropylene material, compared with the organic-inorganic compound system, has poor UV shielding effect, surface hardness and scratch resistance.
CN103881237A discloses an anti-aging polypropylene plastic. By directly adding nano-titanium dioxide to the polypropylene plastic, nano-titanium dioxide will degrade the polypropylene substrate to a certain extent under the action of ultraviolet light in sunlight or light, thus affecting the application. scope

Method used

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  • Anti-scratching polypropylene material with ultraviolet aging resistance and preparation method thereof
  • Anti-scratching polypropylene material with ultraviolet aging resistance and preparation method thereof

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preparation example Construction

[0043] The preparation method of the above-mentioned anti-ultraviolet aging and scratch-resistant polypropylene material comprises the following steps:

[0044] 1) Prepare coated nano-titanium dioxide by liquid phase precipitation;

[0045] 2) Weighing coated nano-titanium dioxide and other raw materials, mixing, melting, extruding, and granulating to obtain an anti-ultraviolet aging and scratch-resistant polypropylene material.

[0046] Preferably, in step 1), the preparation method of coated nano-titanium dioxide is as follows: first prepare nano-titanium dioxide powder suspension, then heat to 85°C, add sodium silicate and dilute sulfuric acid, adjust the pH value to 8-9, and then Aging for 2 hours, drying at 120° C. to obtain coated nano-titanium dioxide.

[0047] Preferably, in step 2), the extrusion is carried out in a twin-screw extruder, the speed of the extruder is 180-600 rpm, and the temperature of each zone is: 160-180°C in the first zone, 190-220°C in the second ...

Embodiment 1

[0054] A kind of anti-ultraviolet light aging scratch-resistant polypropylene material, its raw material formula is as shown in table 1, and its preparation method comprises the following steps:

[0055] Step 1: Prepare the nano-titanium dioxide powder into a suspension with a mass fraction of 1.5%, use 50g / L sodium hexametaphosphate as a dispersant, and ultrasonically oscillate for 30 minutes, then move the dispersed titanium dioxide suspension to a constant temperature magnetic stirrer and heated to 85°C, while adding dropwise 0.2mol / L sodium silicate solution and 0.2mol / L dilute sulfuric acid solution, adjusting the pH value to 8-9, keeping it for 2 hours, and drying at 120°C to obtain into coated nano-titanium dioxide;

[0056]Step 2: Weigh polypropylene resin, coated nano-titanium dioxide, benzotriazole light stabilizer, inorganic filler, coupling agent, antioxidant and lubricant in parts by mass, and mix in a high-speed mixer for 1- After 3 minutes, mix evenly and add i...

Embodiment 2

[0059] An anti-ultraviolet aging and scratch-resistant polypropylene material, its raw material formula is shown in Table 1, its preparation method is the same as in Example 1, and its specific material properties are shown in Table 2.

[0060] Among them, the polypropylene resin is a mixture of homopolymerized PP and copolymerized PP at a ratio of 5:1, and its melt flow rate (230°C / 2.16kg) is 25g / 10min and 7g / 10min respectively, and the coated nano-titanium dioxide is deposited by liquid phase The surface of nano-titanium dioxide particles is coated with a dense and uniform silicon dioxide film, and the particle size of nano-titanium dioxide is 1-100nm, and the benzotriazole light stabilizer is 2-(2'-hydroxyl-5'- tert-octylphenyl) benzotriazole, the inorganic filler is barium sulfate and talcum powder 1:1, the particle size is 5μm and 7μm respectively, the coupling agent is KH550, and the antioxidant is tetrakis[β-(3,5 -Di-tert-butyl 4-hydroxyphenyl) propionate] pentaerythrit...

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Abstract

The invention discloses an anti-ultraviolet aging and scratch-resistant polypropylene material and a preparation method thereof. The anti-ultraviolet aging and scratch-resistant polypropylene material is composed of polypropylene resin, coated nano-titanium dioxide, benzotriazole light stabilizer, inorganic filler, coupling agent, antioxidant and lubricant. At the same time, a preparation method of an anti-ultraviolet aging and scratch-resistant polypropylene material is also disclosed. In the present invention, a layer of dense and uniform silicon dioxide film is coated on the surface of nano-titanium dioxide particles by a liquid-phase deposition method to prepare coated nano-titanium dioxide, which can effectively avoid the degradation of polypropylene substrates by nano-titanium dioxide. The compound use of benzotriazole light stabilizers makes the prepared polypropylene material have strong UV shielding performance, high retention rate of mechanical properties after UV aging for 1000 hours, small degree of pulverization, high surface hardness and scratch resistance The effect is good, and it can be widely used in home appliance shells, automotive interiors and other products.

Description

technical field [0001] The invention relates to an anti-ultraviolet aging and scratch-resistant polypropylene material and a preparation method thereof. Background technique [0002] Polypropylene (PP) has the characteristics of simple synthesis process, excellent comprehensive performance, relatively low price, and easy modification, which makes its modified new materials emerge in endlessly. However, polypropylene is susceptible to ultraviolet light, causing its chemical bonds to break or be activated to cause aging, resulting in a significant decline in product performance and surface pulverization, thereby affecting its service life. Generally, adding UV shielding agent to polypropylene is the most effective way to improve its UV aging performance. [0003] Nano-titanium dioxide is a white loose powder with strong UV shielding effect, good dispersion and weather resistance. It can not only absorb ultraviolet light, reflect and scatter ultraviolet light, but also pass th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08K13/06C08K9/10C08K3/22C08K3/36C08K5/3475C08K5/544C08K5/134C08K5/526C08K3/34
CPCC08L23/12C08K2003/2241C08K2201/003C08K2201/011C08L2201/08C08L2205/02
Inventor 于海鸥罗贤祖王灿耀易庆锋桑杰
Owner GUANGDONG ALDEX NEW MATERIAL CO LTD
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