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Anti-yellowing alkyd resin and synthesis method thereof

A kind of technology of alkyd resin and synthesis method, which is applied in the direction of coating, polyurea/polyurethane coating, etc., can solve the problems of not too much stearic acid added, cost reduction, and too little added amount, etc., to achieve Excellent hardness and other mechanical properties, reduced formulation cost, and good color

Inactive Publication Date: 2012-06-20
FOSHAN GUOHUA CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although pure stearic acid-modified alkyd resin has high hardness, its mechanical properties and special low-temperature performance are poor; stearic acid-lauric acid mixture-modified alkyd resin can balance the overall performance of the resin, but stearic acid-modified alkyd resin The amount should not be too much, too much will cause poor mechanical properties, and the amount should not be too small, too little will not achieve the purpose of cost reduction, and a large amount of lauric acid is still needed in the formula

Method used

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  • Anti-yellowing alkyd resin and synthesis method thereof
  • Anti-yellowing alkyd resin and synthesis method thereof
  • Anti-yellowing alkyd resin and synthesis method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0012] The production recipe of this anti-yellowing alkyd resin is composed of the following component proportions (parts by weight): 16 parts of caprylic and decyl mixed fatty acids, 7 parts of hard fatty acids, 7 parts of benzoic acid, 29 parts of glycerin, 43 parts of phthalic anhydride, and 40 parts of xylene share.

[0013] The above production formula is produced by the following preparation method: first, add 16 parts of octadecyl mixed fatty acid, 7 parts of stearic acid, 7 parts of benzoic acid, 29 parts of glycerin, 43 parts of phthalic anhydride, and 3 parts of refluxed xylene in the reactor under nitrogen protection. Then, the temperature was raised to reflux and kept for 1.5 hours, and then the temperature was raised to 210-215°C at a heating rate of 10°C / h and kept warm until the acid value and viscosity were qualified. Finally, cool down and put it into the diluting kettle to dilute, stir evenly and then filter and pack. The main performance indicators of the p...

Embodiment 2

[0021] The production formula of this anti-yellowing alkyd resin is composed of the following component proportions (parts by weight): 18 parts of caprylic and decyl mixed fatty acids, 10 parts of hard fatty acids, 3 parts of benzoic acid, 22 parts of glycerin, 8 parts of pentaerythritol, and 39 parts of phthalic anhydride , 40 parts of xylene.

[0022] The above production formula is produced by the following preparation method: First, add 18 parts of caprylic mixed fatty acids, 10 parts of stearic acid, 3 parts of benzoic acid, 22 parts of glycerin, 8 parts of pentaerythritol, 39 parts of phthalic anhydride, and 4 parts of refluxed xylene in the reaction kettle , under the protection of nitrogen, raise the temperature to reflux and keep it warm for 1.5 hours, then raise the temperature to 210-215°C step by step at a heating rate of 10°C / h and keep it warm until the acid value and viscosity are qualified. Finally, cool down and put it into the diluting kettle to dilute, stir ...

Embodiment 3

[0030] The production recipe of this anti-yellowing alkyd resin is composed of the following component proportions (parts by weight): 18 parts of caprylic and decyl mixed fatty acids, 5 parts of hard fatty acids, 7 parts of benzoic acid, 29 parts of glycerin, 43 parts of phthalic anhydride, and 20 parts of xylene share.

[0031] The above production formula is produced by the following preparation method: first, add 18 parts of caprylic mixed fatty acid, 5 parts of hard fatty acid, 7 parts of benzoic acid, 29 parts of glycerin, 43 parts of phthalic anhydride, and 4 parts of refluxed xylene in the reaction kettle, and put it under the protection of nitrogen. Then, the temperature was raised to reflux and kept for 1.5 hours, and then the temperature was raised to 210-215°C at a heating rate of 10°C / h and kept warm until the acid value and viscosity were qualified. Finally, cool down and put it into the diluting kettle to dilute, stir evenly and then filter and pack. The main pe...

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Abstract

The invention provides anti-yellowing alkyd resin, which is prepared from 10-18 parts of mixed octyl and decyl fatty acid, 5-10 parts of stearic acid, 3-8 parts of benzoic acid, 25-30 parts of polyatomic alcohol, 39-44 parts of phthalic anhydride and 20-40 parts of dimethylbenzene. By means of the production formula, the cost can be greatly reduced; furthermore, a target product inherits the advantages of the mixed octyl and decyl fatty acid and the stearic acid; the target product is used for anti-yellowing PU (Polyurethane) paint and has excellent levelling property, fullness, hardness and other mechanical properties; in addition, the resin is synthesized by adopting a solvent method, thus, the colour and lustre of the resin are good.

Description

【Technical field】 [0001] The invention relates to a yellowing-resistant alkyd resin and a synthesis method thereof, more specifically to a yellowing-resistant alkyd resin synthesized by using octadecyl mixed fatty acids and stearic acid and a method thereof. 【Background technique】 [0002] Alkyd resin is the main film-forming substance of traditional self-drying paint, polyurethane paint, amino baking paint, etc., and its cost will directly affect the production cost of paint. To reduce the cost of alkyd resin, efforts are usually made on fatty acids, polyols and solvent systems, such as the use of low-priced fatty acids, the use of glycerin as much as possible in formula design, and the use of solvents such as dimethyl carbonate and mixed xylene. The cost of these products is lower than that of traditional alkyd resins, but there is not much room for further decline and cannot meet the requirements of the current situation. Moreover, these partial methods have a relatively...

Claims

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Application Information

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IPC IPC(8): C08G63/49C09D175/06
Inventor 向苗
Owner FOSHAN GUOHUA CHEM IND