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Waterborne alkyd resin modified by epoxy resin and organic silicon and its preparation method

A water-based alkyd resin and epoxy resin technology, used in coatings, fire-retardant coatings, polyester coatings, etc., can solve problems such as unfavorable practical use, surface dryness and slow dryness, and achieve easy construction, full paint film, and improved performance. Effects on storage stability

Inactive Publication Date: 2017-10-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The obtained product not only has the characteristics of traditional basic alkyd resin with full film and easy construction, but also has the characteristics of high temperature resistance and water resistance of silicone resin.

Method used

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  • Waterborne alkyd resin modified by epoxy resin and organic silicon and its preparation method
  • Waterborne alkyd resin modified by epoxy resin and organic silicon and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] a. Alcoholysis: Add 43.5g soybean oil, 43.5g tung oil, 3.8g pentaerythritol and 50.3g trimethylolpropane to the reaction kettle successively under the protection of nitrogen, and heat up from room temperature to 160°C, add 0.032g alcoholysis catalyst lithium hydroxide to the reactor, then heat up to 220°C at a heating rate of 60°C / h for alcoholysis reaction, when the mass concentration is 87% ethanol solution tolerance reaches 1: 4 o'clock to start cooling;

[0035] b. Esterification: When the temperature of the reactor in step a drops to 180°C, add 16.2g epoxy resin E-44, 14.8g benzoic acid, 59.7g isophthalic acid, 10.5g isophthalic acid-5- Sodium sulfonate and 0.08g of esterification catalyst dibutyltin dilaurate, install a water separator to remove the water generated by the esterification reaction at the same time, continuously feed nitrogen into the reaction kettle during the reaction, keep it at 180°C for 1 hour, and then 15°C / h heating rate to 225°C, when the ac...

Embodiment 2

[0039] a. Alcoholysis: Add 50.4g soybean oil, 50.4g tung oil, 4.4g pentaerythritol and 47.7g trimethylolpropane to the reactor successively under the protection of nitrogen. After mixing, the temperature is raised from room temperature to 160°C, add 0.036g alcoholysis catalyst lithium hydroxide to the reactor, then heat up to 220°C at a heating rate of 50°C / h for alcoholysis reaction, when the mass concentration is 87% ethanol solution tolerance reaches 1: 4 o'clock to start cooling;

[0040]b. Esterification: When the temperature of the reactor in step a drops to 180°C, add 12.3g of epoxy resin E-20, 11.8g of benzoic acid, 57.1g of isophthalic acid, and 10.8g of isophthalic acid into the reactor. Formic acid-5-sodium sulfonate and 0.08g of esterification catalyst dibutyltin dilaurate, install a water separator to remove the water generated by the esterification reaction, and continuously feed nitrogen into the reaction kettle during the reaction, and keep it warm at 180°C Af...

Embodiment 3

[0046] a. Alcoholysis: Add 54g soybean oil, 54g tung oil, 8.8g pentaerythritol and 40.4g trimethylolpropane to the reaction kettle in turn under the protection of nitrogen. After mixing, the temperature is raised from room temperature to 160°C at a heating rate of 110°C / h , add 0.042g alcoholysis catalyst lithium hydroxide to the reaction kettle, then heat up to 220°C at a heating rate of 60°C / h for alcoholysis reaction, when the tolerance of the ethanol solution with a mass concentration of 87% reaches 1:4 start to cool down;

[0047] b. Esterification: When the temperature of the reactor in step a drops to 180°C, add 10.6g of epoxy resin E-12, 11.2g of benzoic acid, 53.5g of isophthalic acid, and 11g of isophthalic acid into the reactor -5-sodium sulfonate and 0.08g of esterification catalyst dibutyltin dilaurate, install a water separator to remove the water generated by the esterification reaction, and continuously feed nitrogen into the reaction kettle during the reaction...

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Abstract

The invention belongs to the technical field of coating, and discloses a waterborne alkyd resin modified by epoxy resin and organic silicon and its preparation method. The waterborne alkyd resin modified by epoxy resin and organic silicon is prepared from, by mass percent, 3-6% of epoxy resin, 12-16% of half-dry plant oil, 12-16% of tung oil, 2-5% of benzoic acid, 14-18% of polyhydric alcohols, 15-20% of organic binary acid, 3-5% of aromatic disulfonic acid (salt), 2-4.2% of alkenyl-containing organic silicon monomer, 0.005-0.015% of alcoholysis catalyst, 0.01-0.05% of esterification catalyst, and 22-26% of cosolvent. The waterborne alkyd resin has good storage stability, and can be applied to water-based coating; the waterborne alkyd resin shortens the drying time of paint film and improves the water durability and weather fastness of the paint film.

Description

technical field [0001] The invention belongs to the technical field of coatings, and relates to a water-based alkyd resin, in particular to an epoxy resin and organosilicon-modified water-based alkyd resin and a preparation method thereof. Background technique [0002] Alkyd resin is an important synthetic resin with the earliest development and the largest total output in my country. It is obtained by esterification and polycondensation of vegetable oil, dibasic acid and polyol. It uses aromatic polyester as the main chain and aliphatic polyester as the side chain. , in which the aromatic main chain provides rigidity, the fatty acid side chain provides flexibility, and has good comprehensive performance. Its raw materials are rich in sources, low in price, and its formulations are varied. It is suitable for surface coating of wood, plastics and metals, and for pigments and fillers, etc. It has good wetting and dispersibility, so it has occupied an important position in the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/91C08G63/688C08G63/49C09D167/08
CPCC08G63/48C08G63/6884C08G63/914C09D5/18C09D167/08
Inventor 涂伟萍郝汉卢明凡宇阳红军
Owner SOUTH CHINA UNIV OF TECH
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