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Quick-drying alkyd resin, preparation method thereof, and quick-drying varnish

An alkyd resin, fast-drying technology, used in coatings, anti-corrosion coatings, polyester coatings, etc., can solve the problems of unsuitable alkyd resin, slow drying speed, and no anti-rust function, and achieve good rust prevention. Function, fast drying speed, and the effect of improving drying speed

Active Publication Date: 2017-03-08
湖南开磷雁峰塔涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The most important component in paints and coatings is resin. The basic properties of coatings are closely related to the properties of resins. Alkyd resins have been widely used in the field of room temperature curing coatings and adhesives due to their superior comprehensive performance and cost performance. Application, most of the currently commercially available alkyd resins have a slow drying speed. Specifically, at room temperature, the surface drying time is generally about 2 hours, and the hard drying time is generally about 13 hours. When it is necessary to prepare some fast Existing alkyd resins are mostly not suitable for drying paints or adhesives
In addition, most of the existing varnishes prepared with alkyd resin can only reach about 24 hours in the salt spray test, and basically do not have anti-rust function

Method used

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  • Quick-drying alkyd resin, preparation method thereof, and quick-drying varnish

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Embodiment approach

[0016] As an embodiment of the present invention, a method for preparing a quick-drying alkyd resin, the raw materials are composed of refined oleic acid, benzoic acid, pentaerythritol, phthalic anhydride and xylene, and the preparation process is carried out in the following order:

[0017] Step 1, get the refined oleic acid of 17-21 weight part, the benzoic acid of 16-20 weight part, the pentaerythritol of 8-12 weight part, the phthalic anhydride of 11-15 weight part and the xylene of 5-7 weight part drop into reaction In the kettle, the temperature in the reactor is gradually raised to 170-190 degrees Celsius;

[0018] Step 2, keep the temperature in the reactor at 170-190 degrees Celsius for 5-7 hours and take a sample from the reactor to detect the acid value. When the acid value of the resin in the reactor reaches 20mgKOH / g, further reduce the temperature in the reactor to rise to 225-235 degrees Celsius;

[0019] Step 3, keep the temperature in the reactor at 225-235 d...

Embodiment 1

[0025] First, get 17 parts by weight of refined oleic acid, 16 parts by weight of benzoic acid, 12 parts by weight of pentaerythritol, 15 parts by weight of phthalic anhydride and 5-7 parts by weight of xylene into the reactor, and gradually increase the temperature in the reactor rise to 170-190 degrees Celsius;

[0026] Then, keep the temperature in the reactor at 170-190 degrees Celsius for 5-7 hours and take a sample from the reactor to detect the acid value. When the acid value of the resin in the reactor reaches 20mgKOH / g, further increase the temperature in the reactor to 225-235 degrees Celsius;

[0027] Finally, keep the temperature in the reactor at 225-235 degrees Celsius and take a sample from the reactor to check the viscosity. When the resin in the reactor detects that its viscosity at 25 degrees Celsius is 20-40 seconds with a Grit tube viscometer, stop the reaction The kettle was heated, and the resin in the reaction kettle was cooled to below 100 degrees Cels...

Embodiment 2

[0030] Compared with Example 1, Example 2 only has a change in the weight ratio of refined oleic acid, benzoic acid, pentaerythritol, and phthalic anhydride in step 1, and the other contents are exactly the same. For the sake of simplicity, the same contents will not be repeated here. In the present embodiment, the weight ratio of refined oleic acid, benzoic acid, pentaerythritol, and phthalic anhydride in step 1 is as follows:

[0031] 21 parts by weight of refined oleic acid, 20 parts by weight of benzoic acid, 8 parts by weight of pentaerythritol, and 11 parts by weight of phthalic anhydride.

[0032] Thereafter, as in Example 1, the obtained fast-drying alkyd resin was used to test its drying speed at normal temperature. It was measured that the surface-drying time at normal temperature was about 15 minutes, and the hard-drying time was about 8.15 hours.

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Abstract

The invention provides quick-drying alkyd resin and a preparation method thereof as well as quick-drying varnish, and relates to the technical field of industrial coating. The quick-drying varnish comprises the following components in weight proportion: 75-85% of quick-drying alkyd resin, 0.4-0.6% of a drier, 0-0.2% of an anti-skinning agent and the balance of xylene. The surface drying time of the quick-drying alkyd provided by the invention is about 15 minutes in a normal temperature state, and the hard drying time of the quick-drying alkyd is about 8 hours, the drying speed of the quick-drying alkyd resin is increased greatly in comparison with that of conventional alkyd resin at the normal temperature and the drying speed is extremely high. All technical indexes of the quick-drying varnish provided by the invention reach state specified standards, in addition, the salt spray resistance test can reach about 72 h and the quick-drying varnish has a better antirust function.

Description

technical field [0001] The invention relates to the technical field of industrial coatings, in particular to a quick-drying alkyd resin, a preparation method thereof and a quick-drying varnish. Background technique [0002] The most important component in paints and coatings is resin. The basic properties of coatings are closely related to the properties of resins. Alkyd resins have been widely used in the field of room temperature curing coatings and adhesives due to their superior comprehensive performance and cost performance. Application, most of the currently commercially available alkyd resins have a slow drying speed. Specifically, at room temperature, the surface drying time is generally about 2 hours, and the hard drying time is generally about 13 hours. When it is necessary to prepare some fast Most of the existing alkyd resins cannot be used when drying paints or adhesives. In addition, most of the existing varnishes prepared with alkyd resin can only reach about...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/49C09D167/08C09D5/08C09D7/12
Inventor 毛新民
Owner 湖南开磷雁峰塔涂料有限公司
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