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Preparation method of indoor flatting powder paint

A matting powder coating and multi-acid technology, applied in powder coatings, polyester coatings, epoxy resin coatings, etc., can solve the problems of unstable matting effect of the coating film, large drift of matting degree, etc., and achieve superior mechanical properties of the coating film , a wide range of synthetic raw materials, and superior performance

Inactive Publication Date: 2013-01-02
广东大盈新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, these products of these manufacturers have a fatal flaw in the manufacture of matting powder coatings, that is, the matting effect of the coating film is unstable, and the matting effect of the coating film is easily affected by the type of pigments and fillers, mixing effect, baking temperature and mixing ratio. Influenced by factors, and the degree of extinction has a large drift

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 60.1% terephthalic acid, 10.0% ethylene glycol, 10.6% neopentyl glycol, 10.7% 1,3-propanediol, 0.1% of monobutyltin oxide, 0.1% of triphenyl phosphite and 8.4% of trimellitic anhydride, pass through nitrogen, then rapidly heat up to 260°C, keep warm at this temperature until it becomes clear, cool down to 220°C, and Carry out vacuum polycondensation at high temperature until the acid value is 44.6 mgKOH / g, the viscosity is 26 poise, the glass transition temperature is 58 ℃, the molecular weight is 2236 Dalton and the appearance is light yellow transparent solid A component polyester resin, and finally removed Vacuum, discharge material to the stainless steel plate while it is hot, cool to room temperature; the pressure during the vacuum polycondensation process is 0Mpa, and measure the viscosity with a broolfield cone-plate viscometer at 220°C. During this process, ICI cone-plate viscometer, rotational viscosity can also be used Meter, CV-IS cone and plate viscomete...

Embodiment 2

[0035] 30.1% of terephthalic acid, 5.0% of ethylene glycol, 5.6% of neopentyl glycol, 5.7% of diethylene glycol and 0.1% of Monobutyltin oxide, 0.1% triphenyl phosphite and 53.4% ​​trimellitic anhydride, pass nitrogen, then rapidly heat up to 260°C, keep warm at this temperature until it becomes clear, then cool down to 250°C, and at this temperature Carry out vacuum polycondensation to A component polyester resin with an acid value of 18 mgKOH / g, a viscosity of 47 poise, a glass transition temperature of 60°C, a molecular weight of 9236 Daltons and a light yellow transparent solid appearance, and finally remove the vacuum, Discharge to stainless steel pan while hot, cool to room temperature; pressure during vacuum polycondensation is 0.1Mpa, measure viscosity with broolfield cone-plate viscometer at 250°C; they are weight percent.

[0036] Add 30.1% isophthalic acid, 5.0% ethylene glycol, 5.6% neopentyl glycol, 5.7% diethylene glycol, 0.1% antimony ethylene glycol, 0.3% 2,6-...

Embodiment 3

[0039] 20.1% of terephthalic acid, 22.0% of ethylene glycol, 22.6% of neopentyl glycol, 22.7% of diethylene glycol and 1.8% of Monobutyltin oxide, 1.8% triphenyl phosphite and 29.1% trimellitic anhydride, pass nitrogen, then rapidly raise the temperature to 150°C, keep warm at this temperature until it becomes clear, and carry out vacuum polycondensation at 150°C to acid Component A polyester resin with a value of 32 mgKOH / g, a viscosity of 35 Poise, a glass transition temperature of 53°C, a molecular weight of 8585 Daltons, and a light yellow transparent solid appearance. Finally, the vacuum was removed and the material was discharged to The stainless steel plate was cooled to room temperature; the pressure during the vacuum polycondensation process was 0.1Mpa, and the viscosity was measured with a broolfield cone and plate viscometer at 150°C; they were percentages by weight.

[0040] Add 20.3% phthalic anhydride, 22.9% ethylene glycol, 22.2% neopentyl glycol, 22.4% diethyle...

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Abstract

The invention relates to a preparation method of indoor flatting powder paint, which is characterized by comprising the following steps: adding polybasic acid or acid anhydride, polyalcohol, catalyst and antioxidant into a reaction kettle, mixing, introducing nitrogen, heating to carry out esterification reaction or ester exchange reaction until the reaction liquid is completely clear, carrying out vacuum polycondensation until the acid value is 40-200mg KOH / g and the viscosity is 10-50 poise, cooling, and discharging to obtain the light yellow transparent or semitransparent solid component A polyester resin; adding polybasic acid or acid anhydride, polyalcohol, catalyst and antioxidant into a reaction kettle, mixing, introducing nitrogen, heating to carry out esterification reaction or ester exchange reaction until the reaction liquid is completely clear, carrying out vacuum polycondensation until the acid value is 10-50mg KOH / g and the viscosity is 30-100 poise, cooling, and discharging to obtain the light yellow transparent or semitransparent solid component B polyester resin, wherein the molecular weight of the component A polyester resin and the component B polyester resin are respectively controlled at 1000-10000 dalton; evenly mixing the component A polyester resin, component B polyester resin and polybasic organic acid to obtain a component C polyester resin; and mixing the component C polyester resin, epoxy resin E-12, barium sulfate, titanium white, leveling agent, brightener, physical flatting agent and benzoin to obtain the indoor flatting powder paint. The synthesis method has the advantages of diversity and the like, and can easily implement industrialized mass production.

Description

technical field [0001] The invention relates to a method for preparing an indoor matte powder coating. The indoor matt powder coating is a main raw material for manufacturing an indoor low-gloss powder coating, and belongs to the technical field of material synthesis. Background technique [0002] At present, powder coatings are widely used outdoors, and their varieties are increasing, but they are mainly high-gloss types. With the improvement of production quality, people are no longer satisfied with the monotonous gloss, so powder coatings for outdoor use with different gloss have emerged as the times require. The surface gloss of the coating film is selected according to the subjective and objective conditions such as the user's aesthetics and actual use requirements. In general, noble, beautiful, and luxurious decorations require high gloss, while quiet, comfortable, and elegant environments require low gloss. Generally, machinery used outdoors, car shells, etc. requi...

Claims

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Application Information

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IPC IPC(8): C09D167/00C09D163/00C09D7/12C09D5/03C08G63/78
Inventor 马洪英邓慕建胡默青曹永沂
Owner 广东大盈新材料科技有限公司
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