A kind of low voc silicon-containing modified water-based alkyd resin and preparation method thereof

A water-based alkyd resin and silicon modification technology, applied in the field of fine chemicals, can solve the problems of multi-step preparation method, poor weather resistance, waste of energy, etc., and achieve the effects of reducing VOC content, improving shielding effect, and reducing permeability

Active Publication Date: 2022-02-08
西北永新涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a low-VOC silicon-containing modified water-based alkyd resin to solve the problems of slow drying, low hardness and poor weather resistance in the existing common water-based alkyd series products
[0006] Another object of the present invention is to provide a method for preparing low-VOC silicon-containing modified water-based alkyd resin, so as to solve the problems of multi-step, complicated and waste of energy in the existing preparation method

Method used

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  • A kind of low voc silicon-containing modified water-based alkyd resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Add 30g of soy oil, 11g of pentaerythritol, 8g of trimethylolpropane, 5g of benzoic acid, 11g of phthalic acid, 4g of benzoic acid, and 4.8g of trimellitic anhydride into a reaction flask with a water separator, a thermometer and a reflux condenser and add 5g of xylene to the reaction flask, under the protection of nitrogen, stir and heat to 200°C for esterification reaction for 5 hours, after the acid value drops below 60, cool down to 90°C and add 0.2g of vinyl trimethyl Oxysilane, heat up to 140 ° C for 3 hours, and wait for the acid value to drop below 40 to obtain a reaction solution;

[0038] (2) Xylene was distilled off under reduced pressure at a temperature of 140° C., and then 21 g of ethylene glycol monobutyl ether was added to the reaction solution, cooled and filtered to obtain a low-VOC silicon-containing modified water-based alkyd resin.

Embodiment 2

[0040] (1) Add 30g of soy oil, 12g of glycerol, 8g of trimethylolpropane, 12g of phthalic acid, 7g of terephthalic acid, and 3g of maleic anhydride to the reaction with water separator, thermometer and reflux condenser Add 5g of xylene to the reaction flask, under the protection of nitrogen, stir and heat to 220°C for esterification reaction for 4.5 hours, when the acid value drops below 60, cool down to 100°C and add 0.2g vinyl Triethoxysilane, heat up to 150°C and keep warm for 2.5 hours, and wait for the acid value to drop below 40 to obtain a reaction solution;

[0041] (2) Xylene was distilled off under reduced pressure at a temperature of 150°C, then 16g of propylene glycol monobutyl ether and 6.8g of butanol were added to the reaction solution, and the low-VOC silicon-containing modified water-based alkyd resin was obtained by cooling and filtering.

Embodiment 3

[0043] (1) Add 35 g of linoleic acid, 7 g of pentaerythritol, 13 g of trimethylolpropane, 8 g of benzoic acid, 2 g of maleic anhydride, and 12 g of isophthalic acid into the Add 5g of xylene to the reaction flask, under the protection of nitrogen, stir and heat to 200°C for esterification reaction for 5 hours, after the acid value drops below 60, cool down to 90°C and add 0.3g Vinyltrimethoxysilane, heat up to 140°C for 3 hours, and wait for the acid value to drop below 40 to obtain a reaction solution;

[0044] (2) Xylene was distilled off under reduced pressure at a temperature of 140° C., then 17.7 g of ethylene glycol monobutyl ether was added to the reaction solution, and the temperature was lowered and filtered to obtain a low-VOC silicon-containing modified water-based alkyd resin.

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Abstract

The invention discloses a low-VOC silicon-containing modified water-based alkyd resin and a preparation method thereof, which belong to the field of fine chemicals and solve the problems of slow drying, low hardness and poor weather resistance of existing common water-based alkyd series products. A low-VOC silicon-containing modified water-based alkyd resin, which is composed of the following raw materials in parts by weight: 30-50 parts of vegetable oleic acid, 19-24 parts of polyols, 22-25 parts of monobasic and polybasic acids, and 0.2-0.3 parts of organic silicon 16.7~25 parts of neutralizing agent. The low-VOC silicon-containing modified water-based alkyd resin of the present invention has the excellent characteristics of alkyd resin, increases the compactness of the paint film, reduces the permeability, improves the shielding effect of the paint film, and has obvious advantages in comprehensive anti-corrosion performance. The prepared The primer is water-resistant for more than half a year.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to a low-VOC silicon-containing modified water-based alkyd resin and a preparation method thereof. Background technique [0002] Alkyd resins are polycondensed from polyfunctional alcohols, polybasic acids, and vegetable oils or vegetable oleic acids. Polyfunctional alcohols commonly used in the production of alkyd resins include glycerin, pentaerythritol, trimethylolpropane, etc.; commonly used polybasic acids include phthalic acid, isophthalic acid, etc.; commonly used solvents include toluene, xylene, and 200# solvent oil Wait. [0003] Traditional solvent-based alkyd resins contain a large amount of organic solvents. The biggest disadvantages of this type of resins are that they pollute the environment, are flammable and explosive, and cause great harm to human health. Therefore, water-based alkyd resin is the development direction of alkyd resin. The applied low-VOC...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/91C08G63/49C08G63/78
CPCC08G63/918C08G63/48C08G63/78
Inventor 史芳沅孙学军苏凯李华明雍涛肖菲杨敬霞
Owner 西北永新涂料有限公司
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