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Anticorrosive bottom lacquer of water-soluble alcohol acid, and preparation method

An anti-rust primer and water-soluble alcohol technology, applied in anti-corrosion coatings, coatings, polyester coatings, etc., can solve the problems of poor water resistance of paint films and decreased storage stability of coatings, and achieve good water resistance and facilitate large-scale The effect of promotion and application, good adaptability

Active Publication Date: 2007-10-10
NANJING CHANGJIANG PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fact that the ester bond of the molecular chain of the water-soluble alkyd resin is easily hydrolyzed under weak alkaline conditions, the storage stability of the coating is reduced, and the water resistance of the paint film is poor, which limits its wide application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0036] 1. Put linolenic acid, pentaerythritol and phthalic anhydride in the reaction kettle, start stirring, add xylene to raise the temperature and reflux, raise the temperature to 210°C for esterification, until the acid value drops to 20mgKOH / g is the first step of esterification reaction end.

[0037] 2. Cool down to 140°C, add trimellitic anhydride, then gradually raise the temperature to 180°C for esterification, until the acid value drops to 50mgKOH / g as the end point of the reaction.

[0038] 3. Remove the solvent xylene by vacuum filtration, lower the temperature to 60°C, add the formulated amount of co-solvent and neutralizer, adjust the pH to 7-8, add water to disperse for 3-5 minutes, and obtain a water-soluble solution with a solid content of 50%. Alkyd resin solution.

preparation Embodiment 2

[0040] 1. Put the linoleic acid, pentaerythritol and phthalic anhydride in the reaction kettle, start stirring, add xylene to raise the temperature and reflux, and raise the temperature to 200°C for esterification, until the acid value drops to 30mgKOH / g is the first step of esterification reaction end.

[0041] 2. Cool down to 150°C, add trimellitic anhydride, then gradually raise the temperature to 170°C for esterification, until the acid value drops to 55mgKOH / g as the end point of the reaction.

[0042] 3. Remove the solvent xylene by vacuum filtration, lower the temperature to 50°C, add the formulated amount of co-solvent and neutralizer, adjust the pH=7-8, then add water to disperse for 3-5 minutes, and obtain a water-soluble solution with a solid content of 40%. Alkyd resin solution.

preparation Embodiment 3

[0044] 1. Put the linoleic acid, pentaerythritol and phthalic anhydride in the reaction kettle, start stirring, add xylene to raise the temperature and reflux, raise the temperature to 230°C for esterification, until the acid value drops to 25mgKOH / g is the first step of esterification reaction end.

[0045] 2. Cool down to 150°C, add trimellitic anhydride, then gradually raise the temperature to 200°C for esterification, until the acid value drops to 60mgKOH / g as the end point of the reaction.

[0046] 3. Remove the solvent xylene by vacuum filtration, lower the temperature to 60°C, add the formulated amount of co-solvent and neutralizer, adjust the pH=7-8, then add water to disperse for 3-5 minutes, and the obtained solid content is 60% water-soluble Alkyd resin solution.

[0047] Its specific components are:

[0048] components

weight(%)

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Water-solub...

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PUM

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Abstract

This invention discloses formula and method for preparing high-performance water-soluble alkyd antirust primer. The method comprises: synthesizing water-soluble alkyd resin solution, mixing with antirust pigment, filler, water, drier and additives, dispersing, and grinding. The primer utilizes water as the diluting agent, and is noncombustible, thus is safe for the operators. The volatile organic compound (VOC) content is very low, and can meet the state standards of China. Besides, the primer also has such advantages as safe and convenient usage, high mechanical strength, high corrosion, acid, alkali, salt, oil, weathering and water resistance, and good antirust effect, and can be used as primer for transportation means, bridges, storage tanks, pipes and mechanical equipment.

Description

technical field [0001] The invention relates to a water-soluble alkyd antirust primer and a preparation method thereof, belonging to the technical field of coatings. Background technique [0002] Water-soluble coatings, high-solid coatings, and powder coatings are the development direction of the coatings industry. Alkyd resin paint occupies an extremely important position and a huge share in solvent-based paints due to its excellent durability, gloss, gloss and color retention, hardness, flexibility, and excellent brushability. However, with the sharp increase in the price of petroleum products worldwide and the increasingly stringent environmental protection regulations of various countries, paint manufacturers and paint users pay special attention to the raw material cost of paint and the volatile organic compound (VOC) content of finished paint. The water-soluble alkyd resin paint uses water as a solvent, which saves a large amount of organic solvents, saves resources a...

Claims

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Application Information

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IPC IPC(8): C08G63/49C09D167/08C09D5/12
Inventor 刘保磊常征李纯邱绕生
Owner NANJING CHANGJIANG PAINT
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