Spray-free, high-weather-resistant and scratch-resistant PMMA material and preparation method thereof

A scratch-resistant, spray-free technology, which is applied in the field of polymer materials, can solve the problems of poor scratch resistance of PMMA alloy materials, weather resistance that cannot meet the use of exterior decorations, and weld lines that are prone to appear in spray-free materials, so as to achieve the goal of not sticking easily. The effect of adding other substances, solving the problem of difficult dispersion, and reducing the coefficient of friction

Active Publication Date: 2019-03-01
FOSHAN KAIYUE GRAND SKY PLASTIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN106633572A discloses a spray-free, heat-resistant, weather-resistant high-gloss PMMA alloy material and its preparation method. A compound toughener and light stabilizer comprising acrylate and silicone resin are added to PMMA resin to make PMMA have high Impact resistance and weather resistance, adding a heat-resistant agent to PMMA resin makes PMMA have high heat resistance, but the scratch resistance of the PMMA alloy material is poor, and the weather resistance cannot meet the requirements of outdoor exposure. Use of accessories
Chinese patent CN105885379A discloses a scratch-resistant high-gloss spray-free PC / ASA alloy material, using PMMA, PTFE or polyolefin as a scratch-resistant agent, and the obtained PC / ASA alloy material has poor weather resistance
[0005] Although there have been many reports on spray-free materials, the production of automotive exterior decorations puts forward higher requirements for the weather resistance and scratch resistance of materials, and spray-free materials generally have poor scratch resistance.
Moreover, spray-free materials are prone to defects such as weld marks, flow marks, and tiger skin patterns, and these problems still need to be solved

Method used

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  • Spray-free, high-weather-resistant and scratch-resistant PMMA material and preparation method thereof
  • Spray-free, high-weather-resistant and scratch-resistant PMMA material and preparation method thereof
  • Spray-free, high-weather-resistant and scratch-resistant PMMA material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The formula of this embodiment is shown in Table 1:

[0038] Table 1

[0039]

[0040] The preparation method of PMMA material in this embodiment includes the following steps:

[0041] (1) Mix the above coupling agent with pigments 1, II, and III at high speed for 15 minutes, and bake at 105°C for 60 minutes for coupling treatment to obtain modified pigments.

[0042] (2) The polytetrafluoroethylene and silicone powder are mixed at a mass ratio of 96:4 for 5 minutes, and the mixture is placed in a twin-screw extruder, extruded and granulated to obtain a scratch-resistant agent. The twin screw speed is 230r / min, the extrusion temperature is 200℃-230℃, and the pelletizing speed is 400r / min.

[0043] (3) Mix the modified pigment prepared in step (1), the scratch-resistant agent prepared in step (2), and the remaining raw materials for 8 minutes, and place the mixture in a parallel twin-screw extruder for melt extrusion and granulation. It is necessary to avoid spraying high-gloss ...

Embodiment 2

[0045] The formula of this embodiment is shown in Table 2:

[0046] Table 2

[0047]

[0048] The preparation method of the PMMA material of this embodiment is the same as that of the embodiment 1, and it is necessary to avoid spraying the high-gloss black PMMA material.

Embodiment 3

[0050] The formula of this embodiment is shown in Table 3:

[0051] table 3

[0052]

[0053] The preparation method of this embodiment is the same as that of embodiment 1, and it is necessary to avoid spraying the metal-like PMMA material. Comparative example 1

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Abstract

The invention relates to a spray-free, high-weather-resistant and scratch-resistant PMMA material and a preparation method thereof. The PMMA material comprises, by mass, the following raw materials: 40-60 parts of PMMA resin; 30-40 parts of an impact modifier; 5-20 parts of a scratch-resistant agent; 0.5-1 part of an antioxidant; 0.5-1 part of an ultraviolet absorbent; 2-4 parts of modified pigment; the scratch-resistant agent is prepared from, by mass, 95-98 parts of fluororesin and 2-5 parts of silicone powder. The PMMA material has excellent weather resistance and scratch resistance, and can meet the quality requirements of automobile exterior parts on the weather resistance and the scratch resistance.

Description

Technical field [0001] The invention relates to the field of polymer materials, in particular to a PMMA material with no spraying, high weather resistance and scratch resistance and a preparation method thereof. Background technique [0002] Polymethyl methacrylate (PMMA) has excellent weather resistance, high surface hardness, excellent colorability and transparency, and is widely used in aviation, automotive, electronics, medical, building materials, bathroom and billboard industries. However, ordinary PMMA is easy to crack and fragile due to its low ductility, which limits its further application. [0003] With the increase of people’s awareness of green environmental protection, the application of spray-free materials in automotive interior and exterior decorative parts has become more and more widespread. Due to its high gloss and weather resistance, toughened PMMA has gradually become automotive spray-free exterior parts such as rearview mirrors and B-pillars. These exterior...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08L27/18C08L83/04C08K13/06C08K9/06C08L27/16
CPCC08L33/12C08L2201/08C08L2205/035C08L27/18C08L83/04C08K13/06C08K9/06C08L27/16
Inventor 陈腾渊付济良陈洁钦潘志军
Owner FOSHAN KAIYUE GRAND SKY PLASTIC TECH CO LTD
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