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Alkyd resin preparation method and prepared resin thereof, and acrylic acid modified alkyd resin preparation method and prepared resin thereof

An alkyd resin, functional technology, applied in the direction of coating, etc., can solve the problems of slow drying speed, slow surface drying speed of paint film, easy gelation, etc.

Inactive 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 CN201310521476.5 discloses a water-based acrylic acid modified alkyd resin and its preparation method. In the technical scheme, the acrylic acid modified alkyd resin stage, due to the high proportion of acrylic acid modification and high solid content, makes it difficult to control the viscosity of the reaction system , the synthesis process is very easy to gel; however, if the solid content is reduced, the VOC of the coating prepared with the corresponding resin is higher
[0004] Patent CN200810155329.X discloses a water-based short-oil alkyd resin and its preparation method. In this technical solution, the synthesized water-based alkyd resin contains a large number of ester bonds, and is easily hydrolyzed in the presence of carboxyl groups. Storage poor stability
[0005] Patent CN201210157799.6 discloses a synthesis method of styrene and acrylate modified quick-drying alkyd resin. In this technical scheme, the modification process is based on long oil alkyd resin, using styrene and acrylate Monomer modified copolymerization, the position of the modified graft is on the conjugated double bond of linoleic acid. However, because the glass transition temperature of butyl methacrylate used in this technical solution is low, and a large amount of it participates in the copolymerization, The paint film obtained by the resin is soft, the surface drying speed of the paint film is slow, and the performance still cannot meet the requirements

Method used

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  • Alkyd resin preparation method and prepared resin thereof, and acrylic acid modified alkyd resin preparation method and prepared resin thereof
  • Alkyd resin preparation method and prepared resin thereof, and acrylic acid modified alkyd resin preparation method and prepared resin thereof

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Embodiment 1

[0092] The preparation method of alkyd resin is as follows:

[0093] 1. Under a nitrogen atmosphere, put 225.9g of soy oil, 353g of trimethylolpropane, 35.1g of pentaerythritol, 361.8g of isophthalic acid, and 1g of tetrabutyl titanate into the reactor, start stirring, and raise the temperature to 175°C. The reaction time is 2 hours, then continue to heat up rapidly to 245±5°C for reaction, when the reaction system in the reactor is clear and transparent, continue to keep warm for 30 minutes;

[0094] 2. Cool down the reaction system to 175°C, put in 9.2g of maleic anhydride and 60g of butyl acetate, raise the temperature to 220°C, and the reaction time is 2 hours. The reaction process is condensed and refluxed for dehydration;

[0095] 3. Lower the temperature of the reaction system to 175°C, add 15g of maleic anhydride, control the temperature of the reaction system at 165°C to react, and the reaction time is 1 hour;

[0096] 4. Start the vacuum pump to remove the reflux so...

Embodiment 2

[0103] The preparation method of alkyd resin is as follows:

[0104] 1. Under a nitrogen atmosphere, put 180g of soy acid, 141g of linoleic acid, 70g of neopentyl glycol, 266g of pentaerythritol, 177g of isophthalic acid, 124g of phthalic anhydride, 17.4g of trimellitic anhydride, and 1g of tetrabutyl titanate. In the reaction kettle, start stirring, raise the temperature to 180°C, and the reaction time is 1.5 hours, then continue to rapidly raise the temperature to 245°C for reaction, and start the vacuum pump to force dehydration at the end of the water outlet, when the reaction system in the reaction kettle is clear and transparent, continue to keep warm for 30 minutes ;

[0105]2. Cool down the reaction system to 175°C, put in 9.6g of maleic anhydride, raise the temperature to 220°C, and the reaction time is 1.5 hours. During the reaction process, use a vacuum pump to force dehydration;

[0106] 3. Lower the temperature of the reaction system to 170°C, add 15g of maleic a...

Embodiment 3

[0115] The preparation method of alkyd resin is as follows:

[0116] 1. Under a nitrogen atmosphere, put 100g of ricinoleic acid, 305.8g of soy oil, 293.6g of trimethylolpropane, 29.2g of pentaerythritol, 200g of isophthalic acid, 46.8g of terephthalic acid, and 1g of tetrabutyl titanate. In the reactor, start stirring, raise the temperature to 175°C, the reaction time is 2 hours, then continue to rapidly raise the temperature to 250°C for the reaction, when the reaction system in the reactor is clear and transparent, continue to keep warm for 40 minutes;

[0117] 2. Cool down the reaction system to 170°C, put in 9.6g of maleic anhydride and 38g of butyl acetate, raise the temperature to 225°C, and the reaction time is 1 hour, and the reaction process is condensed and refluxed for dehydration;

[0118] 3. Lower the temperature of the reaction system to 170°C, add 15g of maleic anhydride, and control the temperature of the reaction system to react at 160°C, and the reaction tim...

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Abstract

The invention provides an alkyd resin preparation method and the prepared resin thereof, and an acrylic acid modified alkyd resin preparation method and the prepared resin thereof. According to the alkyd resin preparation method, unsaturated carboxylic acid and / or unsaturated anhydride are / is added step by step to improve the structure of the alkyd resin. According to the acrylic acid modified alkyd resin preparation method, 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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