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An impact-resistant composite material used for powdery paint and modified powdery paint

A technology for powder coatings and composite materials, applied in the field of impact-resistant composite materials for powder coatings and modified powder coatings, can solve the problems of coating breakage, poor mechanical properties, instability, etc., and achieves high alkyl content and short molecular chains. , The effect of good powder dispersion

Active Publication Date: 2018-02-16
SUZHOU GINET NEW MATERIAL TECH CO LTD
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

There is a major defect in this preparation process, that is, when it is applied to the existing dark or black paint formulations, white threads will appear on the surface. According to analysis, this is caused by the instability of the silane treatment agent after it is diluted and modified with alcohols. Precipitation
In addition, since the second silane used is a long-chain alkylsilane, although the dispersion can be better improved, the long-chain alkylsilane cannot be well combined with the resin system, and the coating will be damaged when impacted. The impact point breaks and cracks occur, so the mechanical properties are poor, and its impact performance is less than or equal to 50kg.cm, which cannot meet the high requirements of the market

Method used

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  • An impact-resistant composite material used for powdery paint and modified powdery paint
  • An impact-resistant composite material used for powdery paint and modified powdery paint
  • An impact-resistant composite material used for powdery paint and modified powdery paint

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Embodiment and

[0026] Embodiment and comparative example:

[0027] 61% SiO 2 , 17% Al 2 o 3 , 1% Fe 2 o 3 , 8% CaO, 3% MgO, 10% B 2 o 3 After compounding, it is melted at 1200°C, cooled, and then ball milled and classified to obtain inorganic fillers with different particle sizes.

[0028] Heat the inorganic filler to 75°C, add the first silane, raise the temperature to 100°C and keep it for 20 minutes, then add the second silane, and keep it at 100°C for 20 minutes to prepare the impact-resistant composite material.

[0029] Prepare the powder coating according to the formula in Table 1. The preparation method is to mix and stir the raw materials for 20 minutes, extrude through a twin-screw extruder, cool and press into tablets, and classify. Among them, Comparative Example 1 is a conventional formula, Examples 1 to 12, and Comparative Examples 2 to 11 are modified powder coatings that use impact-resistant composite materials to replace part of barium sulfate. The formulations of th...

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Abstract

The invention relates to an impact-resistant composite material used for powdery paint. The composite material includes an inorganic filler and a silane modifying agent. The mass of the silane modifying agent added is 10-20% of the total mass of the composite material. The inorganic filler has hydroxy, the particle size D50 is not more than 4 [mu]m, and the particle size D100 is less than 15 [mu]m. The silane modifying agent is a mixture of first silane and second silane in a mass ratio of 1.5-3:1. The first silane is one or more selected from epoxy silane, aminosilane, and vinyl silane, and the second silane is an alkyl oligomer. Through improving the formula and a preparing method of the composite material, impact resistance of the powdery paint is increased to 80 kg.cm or above, pencilhardness of the powdery paint is increased to 2 H, the leveling degree of the powdery paint is not less than 4, and adhesive force of the powdery paint is 0.

Description

technical field [0001] The invention belongs to the field of paint materials, and relates to an impact-resistant composite material for powder paint and a modified powder paint. Background technique [0002] Powder coatings usually use barium sulfate as the main filler in the powder coating formula, which can improve the hardness and fullness of the paint film in the coating. However, because the barium sulfate material itself has a Mohs hardness of 3.5 and no hydroxyl groups on the surface, it is compatible with the resin. The binding force is very poor, so that the impact force is less than 30kg.cm, and the hardness is less than 1H. However, the current market puts forward higher requirements on the impact performance of powder coatings, that is, the impact performance is ≥80kg.cm. At present, there is no powder material developed solely to improve the impact performance on the market. To improve the impact performance of powder coatings can only be achieved by replacing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/62
CPCC08K3/36C08K3/38C08K9/06C08K9/08C08K2003/2206C08K2003/222C08K2003/2227C08K2003/2272C08K2201/003C09D5/033
Inventor 李杰胡林政夏古俊徐建霞
Owner SUZHOU GINET NEW MATERIAL TECH CO LTD
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