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Preparation method of water-based fast dry low VOC alkyd paint

A kind of alkyd coating, water-based technology, applied in the field of coatings, can solve the problems of long drying time of water-based coatings, increase VOC content, reduce water resistance of coatings, etc., achieve the effect of reducing hard drying time, reducing construction period, and improving water resistance

Inactive Publication Date: 2017-02-01
CHANGSHA WEIYI CHEM PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a kind of preparation method of water-based quick-drying low-VOC alkyd paint, to solve the water-based paint produced in the prior art needs to add co-solvent, increased VOC content, and due to the hydrophilic group The introduction of the group greatly reduces the water resistance of the coating, and due to the large difference between the volatilization rate of water and the oxygen enrichment rate and the organic solvent, the drying time of the water-based coating is longer and many other defects mentioned above

Method used

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  • Preparation method of water-based fast dry low VOC alkyd paint

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A preparation method of water-based quick-drying low-VOC alkyd paint, comprising the following steps:

[0026] (1) Preparation of quick-drying alkyd resin: Take 170kg of linoleic acid, 37.8kg of benzoic acid, 132.3kg of pentaerythritol, 126kg of phthalic anhydride, 22kg of reflux solvent, and 101kg of dilute solvent, mix 70% of the total amount of linoleic acid, benzoic acid , pentaerythritol, phthalic anhydride and reflux solvent were added to the reaction kettle, and the temperature was slowly raised to 210°C, controlled for 2 hours and then raised to 220°C; then kept at 220°C for 2 hours, and then cooled to 180°C, and then the remaining linolenic acid was added. Raise the temperature to 230°C and keep it warm for 2 hours; finally lower the temperature to 180°C, add dilute solvent, stir and cool down to 50°C to obtain a quick-drying alkyd resin;

[0027] (2) Preparation of alkyd emulsion: 160kg of quick-drying alkyd resin, 1.6kg of polymer emulsifier, 4.8kg of nonioni...

Embodiment 2

[0030] A preparation method of water-based quick-drying low-VOC alkyd paint, comprising the following steps:

[0031] (1) Preparation of quick-drying alkyd resin: Take 170kg of linoleic acid, 54kg of benzoic acid, 107kg of pentaerythritol, 102kg of phthalic anhydride, 22kg of reflux solvent, 107kg of dilute solvent, and mix 70% of the total amount of linoleic acid, benzoic acid, and pentaerythritol , phthalic anhydride and reflux solvent were added to the reaction kettle, and the temperature was slowly raised to 210°C, controlled for 2 hours and then raised to 220°C; then kept at 230°C for 2.5 hours, then cooled to 180°C, and then the remaining linoleic acid was added, and the temperature was raised to 230°C, keep warm for 2 hours; finally lower the temperature to 180°C, add dilute solvent, stir and cool down to 50°C to obtain a quick-drying alkyd resin;

[0032] (2) Preparation of alkyd emulsion: 200kg of quick-drying alkyd resin, 2.0kg of polymer emulsifier, 6.0kg of nonioni...

Embodiment 3

[0035] A preparation method of water-based quick-drying low-VOC alkyd paint, comprising the following steps:

[0036](1) Preparation of quick-drying alkyd resin: Take 180kg of linoleic acid, 51kg of benzoic acid, 129kg of pentaerythritol, 123kg of phthalic anhydride, 24kg of reflux solvent, 114kg of dilute solvent, and mix 70% of the total amount of linoleic acid, benzoic acid, and pentaerythritol , phthalic anhydride and reflux solvent were added to the reaction kettle, and the temperature was slowly raised to 210°C, controlled for 2 hours and then raised to 220°C; then kept at 230°C for 1.5 hours, then cooled to 180°C, and then the remaining linoleic acid was added, and the temperature was raised to 230°C, keep warm for 2 hours; finally lower the temperature to 180°C, add dilute solvent, stir and cool down to 50°C to obtain a quick-drying alkyd resin;

[0037] (2) Preparation of alkyd emulsion: 200kg of quick-drying alkyd resin, 1.8kg of polymer emulsifier, 5.5kg of nonionic...

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Abstract

The invention discloses a preparation method of water-based fast dry low VOC alkyd paint, and relates to the field of paint. The preparation method is as follows: fast dry type alkyd resin is first synthesized, and then emulsified to obtain the alkyd resin, and finally the water-based fast dry low VOC alkyd resin paint is produced using the emulsion as raw material. By adopting a high polymerization method in the alkyd resin synthesizing technology, the hard drying time of the alkyd resin can be effectively shortened, then the drying time of the final water-based paint product is shortened, and the customer's construction cycle is shortened. The emulsion has low VOC content, excellent water resistance property, stability and film formation property. During the whole technological process, the self-made fast dry type alkyd resin is selected, and the content reaches 99% or above. In the process of emulsification and paint preparation, no organic solvent is added; the VOC content in the final paint is controlled to be 60 g / L or below, and the low VOC content water-based alkyd paint is actualized.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a preparation method of a water-based quick-drying low-VOC alkyd coating. Background technique [0002] Alkyd resin has developed rapidly since its development in 1927, and now alkyd resin coatings have become a very widely used coating in the field of industrial protection. However, traditional alkyd resin coatings are solvent-based coatings, which use a large amount of organic solvents and eventually volatilize into the atmosphere, which is not only a great waste of resources, but also causes varying degrees of harm to the environment and human body. In recent years, with the upsurge of environmental protection all over the world, various environmental protection laws have been promulgated one after another, and it is imperative to replace solvent-based alkyd coatings with water-based low-VOC alkyd coatings. [0003] Most of the existing water-based alkyd coatings in my country are wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/08C09D7/12C08G63/49C08J3/03
CPCC09D167/08C08G63/48C08J3/03C08J2367/08C08L71/02C08K13/02C08K5/42C08K5/41
Inventor 何志伟秦向明曾刚
Owner CHANGSHA WEIYI CHEM PAINT
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