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Self-drying aqueous alkyd resin solution and preparation method thereof

A water-based alkyd resin and resin solution technology, which is applied in the field of self-drying water-based alkyd resin solution and its preparation, can solve the problems of water resistance, poor corrosion resistance, slow drying speed of coating film, poor weather resistance, etc., and achieve The effect of easy availability of raw materials, less emissions, and excellent water resistance

Inactive Publication Date: 2010-11-10
SHANGHAI LIANSHENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water-soluble alkyd resins that have been industrialized at present have some obvious disadvantages: slow drying speed of coating film, low hardness, poor water resistance, corrosion resistance, poor outdoor weather resistance, etc., need to be modified to meet the needs of industrial and civil coatings performance requirements

Method used

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  • Self-drying aqueous alkyd resin solution and preparation method thereof
  • Self-drying aqueous alkyd resin solution and preparation method thereof
  • Self-drying aqueous alkyd resin solution and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Add 20kg of terephthalic acid, 5kg of toluic acid, 37kg of triethylene glycol, 45kg of rosin, and 0.2kg of color reducing agent into the reaction kettle to raise the temperature. When the solid reactant melts, start stirring, keep warm at 220°C for 2h, and then Gradually raise the temperature to 260°C, and distill off the esterified water during the reaction to obtain a resin solution;

[0031] (2) When the acid value of the resin solution drops to 15mgKOH / g, cool the solution to 140°C, add 12kg of maleic anhydride, heat up to 220°C, and keep warm until the acid value of the resin solution is 50mgKOH / g;

[0032] (3) Cool the above solution to 120°C, add 15kg of n-butanol, continue to cool down to 60°C, add ammonia water, adjust the pH value of the solution to 8.0, stir for 0.5h, add 1.4 times the amount of resin in deionized water, and prepare self-drying Type water-based alkyd resin solution, the solid content of the resin solution is 45g / 100g deionized water, the ...

Embodiment 2

[0034] (1) Add 21kg of terephthalic acid, 15kg of benzoic acid, 38kg of propylene glycol, 25kg of rosin, and 0.2kg of color reducing agent into the reactor to raise the temperature. When the solid reactant melts, start stirring, keep the temperature at 220°C for 2h, and then gradually raise the temperature to 250°C ℃, the esterification water was distilled off during the reaction to obtain a resin solution;

[0035] (2) When the acid value of the resin solution drops to 20mgKOH / g, cool the solution to 140°C, add 12kg of maleic anhydride, heat up to 220°C, and keep warm until the acid value of the resin solution is 60mgKOH / g;

[0036] (3) Cool the above solution to 120°C, add 15kg of ethylene glycol ether, continue to cool down to 60°C, add triethylamine, adjust the pH value of the solution to 8.0, stir for 0.5h, add deionized water 1.4 times the amount of resin, and prepare Obtained from dry water-based alkyd resin solution, the solid content of the resin solution is 45g / 100g ...

Embodiment 3

[0038] (1) Add 21kg of terephthalic acid, 32kg of benzoic acid, 32kg of propylene glycol, 10kg of rosin, and 0.2kg of color reducing agent into the reactor to raise the temperature. When the solid reactant melts, start stirring, keep the temperature at 220°C for 2h, and then gradually raise the temperature to 250°C ℃, the esterification water was distilled off during the reaction to obtain a resin solution;

[0039] (2) When the acid value of the resin solution drops to 20mgKOH / g, cool the solution to 140°C, add 12kg of maleic anhydride, heat up to 220°C, and keep warm until the acid value of the resin solution is 40mgKOH / g;

[0040] (3) Cool the above solution to 120°C, add 15kg of ethylene glycol methyl ether, continue to cool down to 60°C, add triethylamine, adjust the pH value of the solution to 8.0, stir for 0.5h, add deionized water with 1.4 times the amount of resin, Prepare self-drying water-based alkyd resin solution, the solid content of the resin solution is 45g / 100...

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Abstract

The invention relates to self-drying aqueous alkyd resin solution and a preparation method thereof. According to a formula, the solution comprises the following raw materials in part by weight: 15 to 25 parts of terephthalic acid, 5 to 35 parts of monoacid, 30 to 40 parts of polyatomic alcohol, 10 to 45 parts of rosin, 0.1 to 0.3 part of color reducer, 10 to 15 parts of maleic anhydride and 6 to 15 parts of cosolvent. The preparation method comprises the following steps of: mixing the terephthalic acid, the monoacid, the polyatomic alcohol, the rosin and the color reducer; preserving the heat at the temperature of between 210 and 230 DEG C for 1 to 3 hours to distill off esterified water; cooling the solution to 130 to 150 DEG C, adding the maleic anhydride into the solution and raising the temperature for reaction until the temperature is raised to 210 to 230 DEG C; and reducing the temperature to 110 to 130 DEG C, adding the cosolvent into the solution, continuously reducing the temperature, adding a neutralizing agent into the solution, adjusting the pH value and adding de-ionized water into the solution to obtain the product. By using water as a diluting agent, the solution has the advantages of less using amount and discharge of an organic solvent, readily available raw materials and simple process; and a coating has the advantages of high glossiness, superior water resistance, superior weather resistance, and adhesion and drying property equivalent to those of a solvent-based coating.

Description

technical field [0001] The invention relates to a preparation method, in particular to a self-drying water-based alkyd resin solution and a preparation method thereof. Background technique [0002] Oil-modified polyester resins formed by condensation polymerization of polyols, polybasic acids and fatty acids or oils (triglycerides), can be divided into three types: dry, semi-dry and non-dry, dry alkyd resins Self-curing in air. Alkyd resin is the backbone resin for coatings. Coatings based on alkyd resins have good comprehensive properties, easy access to raw materials, and high cost performance. They have become products with a large volume and a wide range in the coatings industry. Even today when many other synthetic resin coatings are greatly developed, the output of alkyd resins still accounts for more than 40% of the synthetic resins used in coatings. With the development of science and technology, the functions and application fields of alkyd resin coatings are being...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/49C08G63/183C08G63/78
Inventor 童天中汪彬朱根才
Owner SHANGHAI LIANSHENG CHEM
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