Alkyd resin preparation method and resin prepared by the same, and acrylic acid modified alkyd resin preparation method and resin prepared by the same

An alkyd resin, functional technology, applied in coatings and other directions, can solve problems such as high VOC emissions, lax alcoholysis process control, and impact on paint film quality.

Pending Publication Date: 2020-04-03
WANHUA CHEM BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the various resins disclosed in the prior art, including alkyd resins, still cannot simultaneously solve the problems of slow drying speed, low gloss, poor fullness, high VOC emissions, and high overall cost in water-based coatings.
[0003] Patent CN103224615A discloses an alkyd resin composition and its preparation method. In the technical scheme, the active group is capped by the reaction of benzoic acid and pentaerythritol in the first step, so that the finally formed resin has a high proportion of linear structure, high solid content and low The characteristics of viscosity, but the branching degree of the resin prepared in this way is low, the average molecular weight is low, and the self-drying and curing speed is slow in the process of preparing the paint film, which affects the construction efficiency.
In addition, in the examples provided by this technical solution, the VOC emissions of varnish construction are all above 400g/L, and the VOC emissions of white paint construction are close to 570g/L, which is easy to pollute the environment and endanger health
[0004] Patent CN103435791A discloses an acid-alcohol resin for low-odor coatings and a preparation method thereof. The patent produces an alkyd resin by using alcoholysis of vegetable oil to s

Method used

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  • Alkyd resin preparation method and resin prepared by the same, and acrylic acid modified alkyd resin preparation method and resin prepared by the same
  • Alkyd resin preparation method and resin prepared by the same, and acrylic acid modified alkyd resin preparation method and resin prepared by the same
  • Alkyd resin preparation method and resin prepared by the same, and acrylic acid modified alkyd resin preparation method and resin prepared by the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] The tolerance test method of Example 1: Take the sample and methanol in the reactor for testing, mix the sample and methanol at a volume ratio of 1:2 at 25°C and let it stand, when the standing mixture is clear and transparent When the tolerance test is passed.

Embodiment 2

[0103] The tolerance test method of Example 2, Example 5, and Comparative Example 1: Take the sample and methanol in the reactor for testing, mix the sample and methanol at a volume ratio of 1:3 at 25°C and let it stand , when the standing mixture is clear and transparent, the tolerance test is passed.

Embodiment 3

[0104] Example 3, Example 4, Example 6, Comparative Example 2, and Comparative Example 3 Tolerance test method: Take the sample and ethanol in the reactor for testing, and make the sample and ethanol at 25°C at a ratio of 1:5 The volume ratio is fully mixed and allowed to stand. When the standing mixture is clear and transparent, it indicates that the tolerance test has passed.

[0105] Example 1

[0106] The preparation method of alkyd resin is as follows:

[0107] 1. Under a nitrogen atmosphere, put 238g of soybean oil, 349.5g of trimethylolpropane, and 35g of pentaerythritol into the reactor, start stirring, heat up to 220°C, and put in 0.06g of lithium hydroxide for alcoholysis reaction. During the reaction, from Sampling test tolerance in the reactor, if the test is qualified, the alcoholysis reaction is ended; the reaction time used for the alcoholysis reaction is 1.5 hours;

[0108] 2. Control the temperature of the reactor at 180°C, add 353g of phthalic anhydride, 9....

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Abstract

The invention provides an alkyd resin preparation method and a resin prepared by the same, and an acrylic acid modified alkyd resin preparation method and a resin prepared by the same. According to the alkyd resin preparation method, vegetable oil is used as a raw material, and unsaturated carboxylic acid and/or unsaturated anhydride are/is added step by step, so that the structure of the alkyd resin is improved. According to the preparation method of the acrylic acid modified alkyd resin, a unsaturated monomer is fed step by step, and the feeding time is controlled, so that the unsaturated monomer is uniformly grafted on an alkyd resin, and the molecular weight distribution is narrow. The acrylic acid modified alkyd resin prepared by the preparation method is applied to water-based coating materials, so that a paint film has the advantages of high drying speed, high glossiness, good fullness, low VOC emission, excellent comprehensive performance and the like.

Description

technical field [0001] The invention relates to a preparation method of alkyd resin and a preparation method of acrylic acid modified alkyd resin. The resin prepared by the method for preparing the acrylic modified alkyd resin is applied in the field of coatings, especially in the field of water-based coatings. Background technique [0002] With the continuous advancement of science and technology and the continuous enhancement of people's awareness of environmental protection, water-based coatings have gradually replaced high-pollution and high-waste solvent-based coatings due to their outstanding environmental protection. However, compared with solvent-based coatings, water-based coatings still have many problems, such as slow drying speed of the paint film, low gloss, poor fullness, high VOC emissions, and high overall cost. The main factor affecting the performance of the paint film is the resin used in the paint formulation. At present, the commonly used resins in wate...

Claims

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Application Information

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IPC IPC(8): C08G63/49C08F283/01C08F220/14C08F212/08C08F220/06C08F220/18C08F220/20C09D151/08C09D7/61
CPCC08F283/01C08G63/48C08K2003/2241C08K2003/3045C09D151/08C09D7/61C08F220/14C08F212/08C08F220/06C08F220/20C08K3/22C08K3/30
Inventor 焦方军文振广黄旭
Owner WANHUA CHEM BEIJING
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