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Thermosetting powder coating additive and preparation process thereof

A technology of thermosetting powder and coating additives, used in powder coatings, coatings, etc., can solve the problems of uneven coating, roughness, toughness of coating, low surface hardness, etc.

Active Publication Date: 2014-09-03
玉石塑粉有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the thermosetting powder coatings in the above patents often suffer from shrinkage, unevenness, and roughness of the coating film during the coating process, and are absorbed by some low-boiling point by-products or pigments and fillers when the coating is solidified. The pinhole phenomenon caused by moisture, in addition, the toughness and surface hardness of the paint film in the above patent are not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment is a thermosetting powder coating additive, including a first premix and a second premix, wherein the first premix includes 12 parts of a liquid leveling agent and 8 parts of a gas phase two Silicon oxide, the second premix includes 12 parts of benzoin, 12 parts of 701 wetting agent, 20 parts of hydrogenated castor oil, 6 parts of ethylene bis stearamide, 4 parts of polytetrafluoroethylene wax and 6 parts of butyral.

[0044] Specifically, the formulation of the additive is as follows,

[0045] 1. Auxiliary formula:

[0046] 403 liquid leveling agent 12

[0047] Fumed silica 8

[0048] Benzoin 12

[0049] 701 Wetting agent 12

[0050] Hydrogenated castor oil 20

[0051] Ethylene bis stearamide 6

[0052] PTFE wax 4

[0053] Butyral 6

[0054] Total 100 copies

[0055] Note: 403 liquid leveling agent is a fluorine leveling agent produced by SMC Company. The main component is fluorine-modified polypropionate copolymer. It is a colorless and trans...

Embodiment 2

[0082] In the present embodiment, the method for preparing the aforementioned thermosetting powder coating additives comprises the following steps:

[0083] 1) Add 8 parts of fumed silica to the high-speed dispersion mixer;

[0084] 2) Start the stirring paddle, then slowly pour in 12 parts of liquid leveling agent, and stir for about 10 minutes, so that the above-mentioned gas phase silica can completely absorb the liquid leveling agent and disperse evenly to obtain the first premix;

[0085] 3) Add the second premix and stir and homogenize for 5 minutes, so that the first premix and the second premix are completely stirred evenly;

[0086] 4) Shut down and discharge, and put the mixture formed by stirring the first premix and the second premix into the oven for drying;

[0087] 5) Grind the dried mixture through a micro-powder mill;

[0088] 6) Pack the auxiliary agent prepared after grinding.

[0089] Wherein, in the step 3), the process of adding the second premix inclu...

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PUM

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Abstract

The invention discloses a thermosetting powder coating additive and a preparation process thereof, belongs to the technical field of coatings, and aims to provide an additive with functions of promoting wetness to eliminate shrinkage cavities of a coating film so as to obtain the smooth, bright and plump coating film, and eliminating pinholes caused by by-products with low boiling points or water absorbed in pigment fillers during the coating curing so as to improve the toughness of the coating film and enhance the hardness of the surface of the coating film. The additive is generally suitable for thermosetting powder coatings (a plane high-gloss type, a semigloss type or a non-gloss type). In addition, the invention further discloses a preparation process of the thermosetting powder coating additive.

Description

technical field [0001] The invention relates to a thermosetting powder coating additive and a process for preparing the additive. Background technique [0002] Powder coating is a new type of solvent-free 100% solid powder coating. It has the characteristics of no solvent, no pollution, recyclable, environmental protection, saving energy and resources, reducing labor intensity and high mechanical strength of the coating film. [0003] Thermosetting powder coating is a kind of powder coating. In the prior art, a thermosetting powder coating is disclosed in Chinese Invention Patent Publication No. 201310749823, which includes the following raw materials, which are expressed in weight percentage: poly Ester resin: 60-80%; Curing agent: 4-6%; Leveling agent: 0.8-1.2%; Wetting agent: 0.8-1.5%; Defoamer: 0.8-1.5%; UV absorber: 1- 6%; Tetrafluorowax: 0.8-1.5%; Titanium dioxide: 2-12%; Mica powder: 2-8%; Barium sulfate: 4-11%; Inorganic pigment: 0.4-2%; Metallic pigment: 2-8% ﹪. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/12C09D5/03
Inventor 陈玉才
Owner 玉石塑粉有限公司
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