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Food-grade powder coating and preparation method thereof

A powder coating, food-grade technology, applied in powder coatings, polyester coatings, coatings, etc., can solve problems such as difficulty in meeting the growing demand, and achieve good weather resistance, strong adhesion, and appropriate crosslinking density.

Inactive Publication Date: 2021-01-26
GUANGZHOU KINTE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing powder coatings for household appliances have been difficult to meet the growing needs of people

Method used

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  • Food-grade powder coating and preparation method thereof
  • Food-grade powder coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A food-grade powder coating, its composition is shown in the following table:

[0053] Table 1 Composition Table of a Food Grade Powder Coating

[0054]

[0055] The preparation method of the above-mentioned food-grade powder coating comprises the following steps: adding each component into a mixer, adjusting the rotation speed of the mixer to 100rpm, stirring for 10min, and then transferring the material into a twin-screw extruder, extruding, and extruding into two temperature sections , the temperature of the first stage is 100°C-105°C, the temperature of the second stage is 105°C-110°C, pulverize and sieve to obtain the median particle size (D 50 ) 25μm ~ 35μm powder, that is, food-grade powder coating.

Embodiment 2

[0057] A food-grade powder coating, its composition is shown in the following table:

[0058] Table 2 Composition Table of a Food Grade Powder Coating

[0059]

[0060]

[0061]The preparation method of the above-mentioned food-grade powder coating comprises the following steps: adding each component into a mixer, adjusting the rotation speed of the mixer to 100rpm, stirring for 10min, and then transferring the material into a twin-screw extruder, extruding, and extruding into two temperature sections , the temperature of the first stage is 100°C-105°C, the temperature of the second stage is 105°C-110°C, pulverize and sieve to obtain the median particle size (D 50 ) 25μm ~ 35μm powder, that is, food-grade powder coating.

Embodiment 3

[0063] A food-grade powder coating, its composition is shown in the following table:

[0064] Table 3 Composition Table of a Food Grade Powder Coating

[0065]

[0066]

[0067] The preparation method of the above-mentioned food-grade powder coating comprises the following steps: adding each component into a mixer, adjusting the rotation speed of the mixer to 100rpm, stirring for 10min, and then transferring the material into a twin-screw extruder, extruding, and extruding into two temperature sections , the temperature of the first stage is 100°C-105°C, the temperature of the second stage is 105°C-110°C, pulverize and sieve to obtain the median particle size (D 50 ) 25μm ~ 35μm powder, that is, food-grade powder coating.

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Abstract

The invention discloses a food-grade powder coating and a preparation method thereof. The food-grade powder coating provided by the invention comprises the following components in parts by mass: 160 to 240 parts of polyester resin; 80 to 140 parts of a filling material; 12 to 22 parts of a curing agent; 0.5 to 1.6 parts of a curing accelerator; 2 to 6 parts of an adhesion promoter; and 1 to 15 parts of other auxiliary agents. The polyester resin is formed by compounding polyester resin with a low acid value and polyester resin with a high acid value. The preparation method of the food-grade powder coating comprises the following steps: mixing the components, conducting stirring, conducting extruding by using a double-screw extruder, and conducting crushing and sieving to obtain the food-grade powder coating. A paint film formed by the powder coating has excellent high and low temperature resistance, baking resistance, acid and alkali resistance and weather resistance, is high in adhesive force, meets the national standard of food-grade coating products, and meets the standard of household appliance coating enterprises.

Description

technical field [0001] The invention belongs to the technical field of powder coatings, and in particular relates to a food-grade powder coating and a preparation method thereof. Background technique [0002] With the development of society and the improvement of living standards, people are paying more and more attention to their own living environment. Moreover, in recent years, the country's environmental protection requirements for the paint coating industry have become more and more stringent. trend. Therefore, companies engaged in the coating industry have chosen to use greener and more environmentally friendly coatings to replace traditional solvent-based coatings, especially for companies that paint utensils that come into contact with food. The demand for this is more urgent. With the advantages of 4E (environmental protection, economy, high efficiency and excellent performance), powder coating has become the main substitute for solvent-based coatings. [0003] At...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D5/03C09D7/61
CPCC08K2003/3045C08L2205/025C09D5/033C09D167/00C08L67/00C08K13/02C08K3/30C08K3/36C08K3/04
Inventor 高庆福吴宗栓罗绵生欧阳建群叶永权
Owner GUANGZHOU KINTE IND
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