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A weather-resistant powder coating

A powder coating and weather resistance technology, applied in powder coatings, polyester coatings, epoxy resin coatings, etc., can solve the problems of poor salt spray resistance, easy aging, poor weather resistance of powder coatings, etc., to improve outdoor weather resistance. performance effect

Active Publication Date: 2022-05-24
江门市皇宙实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the Chinese invention patent CN113321992A discloses an antibacterial powder coating which has antibacterial properties and high temperature resistance; but its anti-light and oxygen aging ability needs to be further improved, and the salt spray resistance is not good.
Therefore, the powder coating prepared by Chinese invention patent CN113321992A is not good in outdoor weather resistance, easy to age and corroded by salt spray

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Preparation of Weather Resistant Powder Coatings

[0030] Composition of raw materials in parts by weight: 40 parts of epoxy resin; 20 parts of polyester resin; 15 parts of filler (precipitated barium sulfate); 3 parts of curing agent (adipic acid dihydrazide); 2 parts of leveling agent (leveling agent PV88) ; 20 parts of weather-resistant composition;

[0031] The weather-resistant composition is composed of light stabilizer, antioxidant and titanium dioxide in a weight ratio of 2:3:30;

[0032] The light stabilizer is bis(2,2',6,6'-tetramethylpiperidinyl) sebacate; the antioxidant is pentaerythritol distearyl phosphite;

[0033] Preparation method of weather-resistant powder coating: put epoxy resin, polyester resin, filler, curing agent, leveling agent and weather-resistant composition into a high-speed mixer and mix evenly, then extrude the masterbatch with an extruder, and then mix The weather-resistant powder coating is obtained by crushing the master ...

Embodiment 2

[0034] Example 2 Preparation of Weather Resistant Powder Coatings

[0035] The parts by weight of raw materials are composed: the same as in Example 1;

[0036] The weather-resistant composition is composed of a light stabilizer, an antioxidant and a modified titanium dioxide in a weight ratio of 2:3:30;

[0037] Described light stabilizer, antioxidant are with embodiment 1;

[0038] Described modified titanium dioxide is prepared by the following method:

[0039] (1) Mixing titanium dioxide and polydimethylsiloxane (500 viscosity) uniformly to obtain a mixture; wherein, the weight ratio of titanium dioxide and polydimethylsiloxane is 1:1.5;

[0040] (2) calcining the mixture under the condition that the volume content of oxygen is 35% for 2 hours to obtain a solid; and then grinding the obtained solid product uniformly to obtain the modified titanium dioxide.

[0041] Preparation method of weather-resistant powder coating: the same as Example 1.

[0042] The difference be...

Embodiment 3

[0043] Example 3 Preparation of Weather Resistant Powder Coatings

[0044] The parts by weight of raw materials are composed: the same as in Example 1;

[0045] The weather-resistant composition is composed of a light stabilizer, an antioxidant, a dispersant and a modified titanium dioxide in a weight ratio of 2:3:2:30;

[0046] Described light stabilizer, antioxidant are with embodiment 1;

[0047] The dispersant is composed of microcrystalline paraffin and calcium stearate in a weight ratio of 2:1.

[0048] Described modified titanium dioxide is prepared by the following method:

[0049] (1) Mixing titanium dioxide and polydimethylsiloxane (500 viscosity) uniformly to obtain a mixture; wherein, the weight ratio of titanium dioxide and polydimethylsiloxane is 1:1.5;

[0050] (2) calcining the mixture under the condition that the volume content of oxygen is 35% for 2 hours to obtain a solid; and then grinding the obtained solid product uniformly to obtain the modified titan...

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Abstract

The invention relates to the technical field of powder coating preparation, and specifically discloses a weather-resistant powder coating. The weather-resistant powder coating is prepared from epoxy resin and / or polyester resin as the main raw material, and a weather-resistant composition is added during the preparation of the weather-resistant powder coating; the weather-resistant composition includes: a light stabilizer, an anti- Oxygen and titanium dioxide. In the present invention, by adding a weather-resistant composition composed of a light stabilizer, an antioxidant and titanium dioxide; the prepared powder coating has certain photo-oxidative aging resistance and salt spray resistance; greatly improves the epoxy resin and / / Or the outdoor weather resistance of powder coatings prepared with polyester resin as the main raw material.

Description

technical field [0001] The invention relates to the technical field of powder coating preparation, in particular to a weather-resistant powder coating. Background technique [0002] Powder coatings are solid powdery synthetic resin coatings composed of solid resins, fillers and additives; they are widely used due to their absence of solvent pollution. Chinese invention patent CN113321992A discloses an antibacterial powder coating, which uses polyester resin and epoxy resin as composite raw materials, single nano-silver as antibacterial agent, and also adds high temperature resistant filler; therefore, the prepared antibacterial powder The coating not only has antibacterial properties, but also the antibacterial powder coating has high temperature resistance. [0003] Although Chinese invention patent CN113321992A discloses an antibacterial powder coating with antibacterial properties and high temperature resistance, its anti-photo-oxidative aging ability needs to be further...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D167/00C09D5/03C09D7/62C09D7/63C09D7/65
CPCC09D163/00C09D5/033C08K2003/2241C08L67/00C08L91/06C08K9/08C08K3/22C08K5/3435C08K5/524C08K5/098
Inventor 陈锐波
Owner 江门市皇宙实业有限公司
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