Emulsion for fast-drying, high-gloss, high-weather resistance water-based 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, the gloss of difficult-to-color paint films, complex processes, etc., and achieve the best weather resistance and chemical resistance. The effect of reducing hydrolysis and simple process

Active Publication Date: 2021-07-16
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 for fast-drying, high-gloss, high-weather resistance water-based alkyd paint and preparation method thereof
  • Emulsion for fast-drying, high-gloss, high-weather resistance water-based alkyd paint and preparation method thereof
  • Emulsion for fast-drying, high-gloss, high-weather resistance water-based alkyd paint and preparation method thereof

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preparation example Construction

[0045] The preparation method of emulsion of the present invention, including the following steps:

[0046] Step 1, the preparation of alkyd resins:

[0047]1) Extract high temperature alcohol solution, cooling, cooling, cane, 0.02 parts of glycerol, 0 ~ 3 scrottess, 0.02 parts glycerol, 0 ~ 3 sucrose and 0.02 parts of alcohol solution (calcium oxide or lithium hydroxide) Add 31.48 ~ 28.48 parts of the anhydride, under nitrogen protection, refluxed by refluxed solvent xylene reflux, the temperature rises to 180 ° C, reaction for 1 h, temperature rise to 190 ° C, temperature rise to 220 ° C, esterification reaction;

[0048] Or a mass fraction is 59.5 to 51 parts of dry oleic acid (linoleic acid or dehydrated castor oil) or semi-dried oleic acid (soybean acid) and 20 to 25 parts of benzepine, 20.5 to 24 parts of polyol (glycerol) , Mixture of trimethylolpropane, pentaerythritol or sucrose) is added to the container, under nitrogen protection, refluxed with chlorobenzene in a reflux...

Embodiment 1

[0058] Example 1: (Part 1 synthesis method of alkyd resin in step 1)

[0059] Emulsion synthesis process for quick-dry high-quality high-weathering aqueous alkyd coating:

[0060] The first step, the preparation of alkyd resin: The mass fraction is 53 servoral oil, 15.5 parts of glycerin, 3 parts of sucrose, 0.02 parts of lithium hydroxide, and the four flasks of the condenser, a divider, and the thermometer, Tong nitrogen gas, under nitrogen protection, alcoholysis, dissolve the alcoholic product with ethanol by mass ratio 1: 5, if the ethanol solution of the alcoholic product is clear and transparent, alcoholytic completion, cooling to 180 ° C, add 28.48 parts of beanic anhydride And refluxed xylene, reaction 1 h, temperature rose to 190 ° C for 1 h, warmed to 220 ° C, reaction to an acid value of 16 ± 3 mgKOH / g, resulting a linolel acid resin;

[0061] In the second step, the preparation of acrylic modified alkyd resin: 24.1 parts of a linolenoleic acid resin, 6.9 parts of pr...

Embodiment 2

[0063] Example 2: (Corresponding to the first synthesis method of the alkyd resin in step 1)

[0064] Emulsion synthesis process for quick-dry high-quality high-weathering aqueous alkyd coating:

[0065] The first step, the preparation of alkyd resin: 1 of the mass fraction of 47.5 server, 21 parts of glycerol, 0.02 parts of lithium hydroxide, and the four flasks of the condenser, a divider, and the thermometer, nitrogen gas, Under nitrogen protection, alcoholysis is peroxide, and the alcoholic product is dissolved from 1: 5, and if the ethanol solution of the alcohol product is clear and transparent, the alcohol is completed, cooling to 180 ° C, add 31.48 parts of benzephen and reflow xylene The reaction was 1 h, warmed to 190 ° C for 1 h, warmed to 220 ° C, and the acid value was 10 ± 3 mgKOH / g, resulting in a linolenoleic acid resin;

[0066] In the second step, the preparation of acrylic modified alkyd resin: 21.3 parts of a linenerolate acid resin, 3.0 parts of propylene gl...

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Abstract

The invention discloses a fast-drying, high-gloss, high-weather resistance water-based alkyd paint emulsion and a preparation method, comprising 28-16.5 parts of alkyd resin; 5-15 parts of alcohol ether solvent; 7-38.5 parts of acrylate monomer initiator solution; 1.3-4.5 parts of blending agent; 58.7-25.5 parts of deionized water. The emulsion first prepares an alkyd resin with a suitable acid value, and then uses alcohol ether as a solvent, under the action of an oil-soluble initiator and a chain transfer agent, anionic unsaturated monomers, short-chain unsaturated monomers, The acrylic acid modified alkyd resin is prepared by free radical copolymerization reaction between acrylate monomer and alkyd resin, which is neutralized by amine and then dispersed in water to obtain a fast-drying, high-gloss, high-weather resistance water-based alkyd coating emulsion. The method has the characteristics of monomer type selection and wide variation in composition range, easy-to-obtain raw materials and easy control of the preparation process, etc., and is easy to popularize and apply in actual industry. The water-based alkyd paint prepared by using the emulsion of the present invention has the characteristics of fast drying, high gloss and high weather resistance. features.

Description

Technical field [0001] The present invention belongs to the field of organic polymer compounds, and more particularly to emulsions and preparation methods for fast-drying high-temperature resistance aqueous alkyme-acid coatings for metal anti-corrosion. Background technique [0002] Since 2015, my country has enacted coating consumption tax and gradually began to limit solvent-based coatings with high VOC content. Each line of demand for waterborne coatings with small pollution, low VOC content, and safe environmental protection began to increase, which promoted The boom of aqueous resin research, an aqueous alkyd resin emulsion is also one of the hotspots of research. Conventional aqueous alkyd emulsions are susceptible to hydrolyzed in alkaline conditions, and the aqueous paint is stored for more than 3 months. The general modified alkyd resin emulsion is introduced into a batteric anhydride in the preparative alkyric acid resin. Synthesis temperature lower the need refluxing s...

Claims

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Application Information

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Patent Type & Authority Patents(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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