Preparation method heat-resistant powder coating for stainless steel surface

A powder coating and stainless steel technology, applied in powder coatings, anti-corrosion coatings, fire-resistant coatings, etc., to achieve excellent chemical resistance and physical and mechanical properties, good weather resistance and temperature resistance, and high utilization.

Inactive Publication Date: 2021-02-26
安徽丰业不锈钢有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the condition of CUI, there is no obvious metal loss of stainless steel, and no corrosive substances with different colors are produced, so there is no precursor of any metal performance failure

Method used

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  • Preparation method heat-resistant powder coating for stainless steel surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Weigh the following raw materials in parts by weight: 37 parts of neopentyl glycol, 14 parts of ethylene glycol, 6 parts of diethylene glycol, 6 parts of trimethylolpropane, 81 parts of para For phthalic acid and 0.4 parts of p-toluenesulfonic acid, gradually heat up to 110°C under nitrogen protection atmosphere. During the process of esterification and effluent, alcohol should be prevented. Continue to heat up to 245°C and keep it warm for 1 hour. Continue to stir until the acid value reaches 24mgKOH / g When the temperature is lowered to 225°C for polycondensation and stirring for 0.5h, when the acid value reaches 7mgKOH / g, continue to cool down to 205°C, then add 8 parts of trimellitic anhydride to carry out capping stirring reaction for 0.5h, continue to cool down to 195°C and continue stirring for 0.5h Discharge to obtain a modified polyester resin; (2) Weigh 100 parts of xylene and add it to a reaction kettle equipped with a thermometer, agitator and a condenser ...

Embodiment 2

[0017](1) Weigh the following raw materials in parts by weight: 35 parts of neopentyl glycol, 12 parts of ethylene glycol, 2 parts of diethylene glycol, 4 parts of trimethylolpropane, 75 parts of para For phthalic acid and 0.2 parts of p-toluenesulfonic acid, gradually heat up to 100°C under a nitrogen atmosphere. During the process of esterification and effluent, alcohol should be prevented. Continue to heat up to 230°C and keep it warm for 1 hour. Continue to stir until the acid value reaches 20mgKOH / g Cool down to 225°C for polycondensation and stir for 0.5h, wait until the acid value reaches 13mgKOH / g, continue to cool down to 210°C, then add 11 parts of trimellitic anhydride to carry out capping and stir for 1h, continue to cool down to 200°C and continue stirring for 1h before discharging , to obtain a modified polyester resin; (2) Weigh 105 parts of xylene and add it to a reaction kettle equipped with a thermometer, agitator and a condenser tube, raise the temperature to...

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Abstract

The invention belongs to the technical field of coatings, and particularly relates to a preparation method of a heat-resistant powder coating for a stainless steel surface. The powder coating preparedby the preparation method disclosed by the invention is good in weather resistance and temperature change resistance, not only has the performance of a common coating, but also has heat resistance, corrosion resistance, weather resistance and the like. The powder coating can be widely applied to various stainless steel high-temperature-resistant devices such as barbecue ovens, heating pipelines,hot blast stoves, drying ovens, motorcycle smoke exhaust pipes and chimneys, and has the advantages of environmental friendliness, safety, high utilization rate, good performance and the like. A coating layer formed from the coating has a net-shaped cross-linked structure and high bond energy, and thus has high oxidation stability, excellent chemical resistance and excellent physical and mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of coatings, in particular to a method for preparing heat-resistant powder coatings on stainless steel surfaces. Background technique [0002] Stainless steel usually refers to a group of black alloys, including at least 11%~12% (mass fraction) of chromium, and its main performance is to resist corrosion or rust in relatively mild climates. A feature common to all stainless steels is a thin, extremely dense surface layer of chromium oxide (Cr2O3), formed in the presence of oxygen, and integrated with the base metal, for appearance or in specific environments to help improve durability It is often necessary to paint stainless steel. Moreover, the formulations of stainless steel produced by different manufacturers are very different, and the choice of coating materials should also be changed accordingly. If the use environment or operating process is improper, corrosion failure of stainless steel will occur. ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C09D167/02C09D133/12C09D5/08C09D5/03C09D7/61C08G63/91C08G63/672C08F220/14C08F220/32C08F220/18C08F212/08
CPCC08F220/14C08G63/672C08G63/916C08K2003/162C08K2003/2227C08K2003/265C08L2201/08C09D5/033C09D5/08C09D5/18C09D167/02C08F220/325C08F220/1804C08F212/08C08L33/12C08K13/02C08K3/22C08K3/36C08K3/16C08K3/26
Inventor曾世荣邵大学
Owner安徽丰业不锈钢有限公司