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Emulsion used for quick-drying high-gloss high-weatherability waterborne alkyd paint, and preparation method thereof

A water-based alkyd and weather-resistant technology, applied in the direction of coating, etc., can solve the problems that affect the use and promotion of water-based alkyd coatings, difficult-to-color paint film gloss, poor water resistance, etc., to achieve good weather resistance and chemical resistance, Effect of reducing hydrolysis and improving initial water resistance

Active Publication Date: 2019-08-23
陕西宝塔山油漆股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional water-based alkyd emulsions are easy to hydrolyze under alkaline conditions, and the water-based paints made are easy to dry out after being stored for more than 3 months; general modified alkyd resin emulsions are introduced into trimellitic anhydride during the preparation of alkyd resins. It is relatively low, and the reflux solvent needs to be distilled under reduced pressure, the process is complicated and the energy consumption is large; at the same time, the conventional water-based acrylic modified alkyd resin is difficult to achieve due to the large phase separation between the alkyd resin and the acrylic resin. The gloss of the color paint film is more than 90 while drying quickly; in addition, after the conventional water-based alkyd paint is dried and formed into a film, the initial water resistance is poor, which seriously affects the use and promotion of water-based alkyd paint

Method used

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  • Emulsion used for quick-drying high-gloss high-weatherability waterborne alkyd paint, and preparation method thereof
  • Emulsion used for quick-drying high-gloss high-weatherability waterborne alkyd paint, and preparation method thereof
  • Emulsion used for quick-drying high-gloss high-weatherability waterborne alkyd paint, and preparation method thereof

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preparation example Construction

[0045] The preparation method of the emulsion for fast-drying high-gloss high-weather-resistant water-based alkyd paint of the present invention comprises the following steps:

[0046] Step 1, prepare alkyd resin:

[0047]1) Add 53-47.5 parts of linseed oil, 15.5-21 parts of glycerin, 0-3 parts of sucrose and 0.02 parts of alcoholysis catalyst (calcium oxide or lithium hydroxide) into the container for high-temperature alcoholysis, and then make up after cooling down. Add 31.48-28.48 parts of phthalic anhydride, under the protection of nitrogen, reflux with reflux solvent xylene, raise the temperature in stages, raise the temperature to 180°C, react for 1h, raise the temperature to 190°C for 1h, raise the temperature to 220°C, and carry out the esterification reaction;

[0048] Or the mass fraction is 59.5~51 parts of dry oleic acid (linolenic acid or dehydrated ricinoleic acid) or semi-dry oleic acid (soybean oil) and 20~25 parts of phthalic anhydride, 20.5~24 parts of polyol...

Embodiment 1

[0058] Embodiment 1: (the 1st synthetic method of alkyd resin in the corresponding step 1)

[0059] Emulsion synthesis process for fast-drying, high-gloss and high-weather resistance water-based alkyd coatings:

[0060] The first step, the preparation of alkyd resin: the mass fraction is that 53 parts of linseed oil, 15.5 parts of glycerin, 3 parts of sucrose, 0.02 part of lithium hydroxide are added in the four-necked flask that condenser tube, water separator, thermometer are housed, Pass nitrogen, under the protection of nitrogen, carry out alcoholysis, dissolve the alcoholysis product and ethanol at a mass ratio of 1:5, if the ethanol solution of the alcoholysis product is clear and transparent, the alcoholysis is complete, lower the temperature to 180°C, and add 28.48 parts of phthalic anhydride and reflux xylene, react for 1h, heat up to 190°C for 1h, heat up to 220°C, react until the acid value is 16±3mgKOH / g, and obtain linseed oil alkyd resin;

[0061] The second ste...

Embodiment 2

[0063] Embodiment 2: (the first synthetic method of alkyd resin in the corresponding step 1)

[0064] Emulsion synthesis process for fast-drying, high-gloss and high-weather resistance water-based alkyd coatings:

[0065] The first step, the preparation of alkyd resin: the mass fraction is that 47.5 parts of linseed oil, 21 parts of glycerol, 0.02 parts of lithium hydroxide are added in the four-necked flask that condenser pipe, water separator, thermometer are housed, blow nitrogen, in Under the protection of nitrogen, carry out alcoholysis, dissolve the alcoholysis product and ethanol at a mass ratio of 1:5, if the ethanol solution of the alcoholysis product is clear and transparent, the alcoholysis is complete, cool down to 180°C, add 31.48 parts of phthalic anhydride and reflux xylene , react for 1 hour, heat up to 190°C for 1 hour, heat up to 220°C, react until the acid value is 10±3mgKOH / g, and obtain linseed oil alkyd resin;

[0066] The second step, the preparation of...

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Abstract

The invention discloses an emulsion used for quick-drying high-gloss high-weatherability waterborne alkyd paint, and a preparation method thereof. The emulsion is composed of 28 to 16.5 parts of alkydresin; 5 to 15 parts of an alcohol ether solvent; 7 to 38.5 parts of an acrylate monomer initiator solution; 1.3 to 4.5 parts of a neutralizer; and 58.7 to 25.5 parts of deionized water. The preparation method comprises following steps: an alkyd resin with an appropriate acid value is prepared, alcohol ether is taken as a solvent, under the effect of an oil soluble initiator and a chain transferring agent, an anionic unsaturated monomer, a short chain unsaturated monomer, a long carbon chain acrylate monomer, and the alkyd resin are subjected to free radical copolymerization to prepare an acrylic acid modified alkyd resin; amine neutralizing is carried out, and water is adopted for dispersion so as to obtain the emulsion used for quick-drying high-gloss high-weatherability waterborne alkyd paint. The preparation method possesses following characteristics: monomer kind selection and composition range is wide; the raw materials are easily available; the process is convenient to control;popularization and applications in practical industrialized production are convenient; and the waterborne alkyd paint prepared from the emulsion possesses quick drying performance, high gloss, and high weatherability.

Description

technical field [0001] The invention belongs to the field of organic polymer compounds, in particular to an emulsion used as a fast-drying high-gloss high-weathering water-based alkyd paint for metal anticorrosion and a preparation method thereof. Background technique [0002] Since 2015, my country has promulgated the coating consumption tax and gradually began to restrict the use of solvent-based coatings with high VOC content. The demand for water-based coatings with low pollution, low VOC content, and safety and environmental protection has begun to increase rapidly in all walks of life. This has promoted The upsurge of water-based resin research, water-based alkyd resin emulsion is also one of the hot spots of research. Conventional water-based alkyd emulsions are easily hydrolyzed under alkaline conditions, and the water-based paints made are easy to dry out after being stored for more than 3 months; general modified alkyd resin emulsions are introduced into trimellitic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01C08F220/18C09D151/08
CPCC08F283/01C09D151/08C08F220/1804
Inventor 卫龙刘宪文陈安强刘洋汪延茂孙佳佳刘晓庆夏克龙郭雯王娅丽
Owner 陕西宝塔山油漆股份有限公司
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