A kind of electrostatic additive for powder coating, preparation method and application thereof

A powder coating and additive technology, applied in powder coatings, conductive coatings, polyester coatings, etc., can solve the problems of particle surface electrical instability, bad smell and instability of steric hindered tertiary amines, and achieve good triboelectric performance , Eliminate Faraday phenomenon, good compatibility effect

Active Publication Date: 2020-05-12
广西零到壹科技有限责任公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the instability of catalytic curing function of triethylamines in the mixing and storage of powder coatings containing epoxy groups, the bad smell of steric hindered tertiary amines, and the compatibility of polymer polyelectrolytes with powder coating resins The phenomenon of electrical instability on the surface of the particles caused by the property, the invention provides a kind of electrostatic additive for powder coating, preparation method and application thereof, to solve the above-mentioned problems

Method used

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  • A kind of electrostatic additive for powder coating, preparation method and application thereof
  • A kind of electrostatic additive for powder coating, preparation method and application thereof
  • A kind of electrostatic additive for powder coating, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Synthesis of NR-C

[0037] Dissolve heavy 144g rosin amine in 350ml of 95% ethanol, slowly add 154g of formic acid with a concentration of 2.5 times or more in terms of primary amine moles and control the temperature below 40°C under cooling conditions, and control the temperature below 40°C; Then add 120g of formaldehyde with a concentration of 36% or more than 1.5 times the number of moles of primary amine, heat up to 70°C and reflux for 5 hours until the reaction is complete, then distill and separate the solvent ethanol and formic acid, cool to 40°C and add sodium hydroxide to neutralize to pH 10, washed with nearly saturated sodium chloride water to pH 8, extracted the oil layer with benzene, and collected about 125 g of rosin tertiary amine product by vacuum distillation.

[0038] Add the above-mentioned 63g rosin tertiary amine product into 150ml of dichloromethane, and heat until completely dissolved. Add 88ml of 20% 1,4-dichlorobenzyl dichloromethane solution ...

Embodiment 2

[0040] Preparation of NR-S

[0041] 40 grams of NR-C, that is, the rosin-based bis-quaternary ammonium chloride prepared in Example 1, was dispersed in 200 ml of 3M sodium sulfate aqueous solution, stirred for 2 hours at 50 ° C and a rotating speed of 1200 r / min, filtered, and removed. Wash with ionized water until the conductivity of the filtrate is lower than 100 μS, and dry to obtain rosin-based bis-quaternary ammonium sulfate product code name NR-S.

Embodiment 3

[0043] Preparation of NR-M

[0044] With reference to Example 2, 40 grams of NR-C, that is, the rosin-based bis-quaternary ammonium chloride salt prepared in Example 1, was dispersed in 200 ml of 1M sodium molybdate aqueous solution, and at 50 ° C, the rotating speed was 1500 r / min. Stir for 3 hours, filter, wash with deionized water until the conductivity of the filtrate is lower than 100 μS, and dry to prepare the rosin-based bisquaternary ammonium molybdate product code name NR-M.

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Abstract

The invention discloses an electrostatic additive for a powder coating as well as a preparation method and application thereof. The electrostatic additive for the powder coating is a rosin-based bi-quaternary ammonium salt compound, is prepared by the steps of rosin-based dimethyl tertiary amine preparation, rosin-based dimethyl tertiary amine separation, rosin-based biquaternary ammonium salt ammonium chloride synthesis, anion replacement reaction and the like, is used for improving the triboelectric property of the powder coating or can be rapidly charged in the charge control application ofthe high-pressure powder coating and improve the amount of charges.

Description

【Technical field】 [0001] The invention belongs to the field of electrostatic additives for powder coatings, and in particular relates to an electrostatic additive for powder coatings, a preparation method and application thereof. 【Background technique】 [0002] Powder coating is an environmentally friendly coating, based on the fact that there is no VOC release during its manufacture and use, and there is no solid waste discharge, and the fallen powder coating particles can be recycled and recycled. Powder coating is composed of resins, pigments, fillers and functional additives, which are mixed, cooled and pulverized to solid particles with a certain particle size such as 20-50 microns. It has an electrostatic charge, is deposited on the surface of the object to be coated under the promotion of an electric field or gas, and is melted or solidified to form a film to complete its construction process. The powder coating that is not deposited on the object to be coated can be ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C211/64C07C211/62C09D5/03C09D5/24C09F1/04C09D167/00C09D193/04
CPCC09D5/034C09D5/24C09D167/00C08L93/04
Inventor 黄科林余慧群潘凯潘丽珠罗想平郭佳文张宁罗佐帆覃善丽张鹏鹏罗朝巍吴睿谢清若陆泰榕
Owner 广西零到壹科技有限责任公司
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