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Modified waterborne alkyd resin of organic acid salt and preparation method thereof

A water-based alkyd resin and organic acid salt technology, applied in the field of water-based alkyd resin and its preparation, can solve the problems of complex production process, poor water resistance of coating film, easy to form flash rust, etc., and achieve simple production process and coating film hardness High, not easy to flash rust effect

Active Publication Date: 2009-09-16
湘江涂料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned alkyd resin aqueous solution prepared by the salt-forming method, because the solution is alkaline, the lipid bonds in the polymer are easily broken and the polymer is degraded, the properties change, and the coating used for making has poor storage stability; The paint is easy to form flash rust on the metal surface; the water resistance of the coating film is poor; the drying speed is also slow, and the surface drying time is often as long as 2 hours; and the production process is complicated and the production cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Add 9 parts of diethylene glycol, 12 parts of trimethylolethane, 23 parts of terephthalic acid, 6 parts of sodium isophthalate, 4 parts of sodium tartrate, and 0.08 parts of dibutyl tin dilaurate into the reaction Kettle; (2) Fill with nitrogen, under the protection of nitrogen, heat the mixture in the reactor to 140°C in 2.8 hours, start the stirrer, continue to heat up to 170°C, heat up to 200°C at a rate of 15°C / hour, keep warm 2 hours; (3) Increase the temperature to 260°C at a rate of 15°C / hour, keep it for 2 hours until the materials in the reactor are transparent; (4) Cool down to 200°C, add 20 parts of xylene, reflux for 2 hours and start sampling for acid detection When the acid value is 25mgKOH / g, cool down to 160℃ and add 8 parts of trimellitic anhydride and 6 parts of maleic acid; (5) Warm up to 190℃ and keep it warm; when the acid value is 55mgKOH / g, cool down. When the temperature drops to 150°C, add 35 parts of ethylene glycol monobutyl ether, filter and ...

Embodiment 2

[0020] (1) Add 4 parts of 1,3-propanediol, 13 parts of glycerol, 11 parts of fumaric acid, 8 parts of sodium phthalate sulfonate, and 0.03 parts of dibutyl tin diacetate into the reactor; (2) ) Fill with nitrogen, under the protection of nitrogen, heat the mixture in the reactor to 110°C in 2.5 hours, start the stirrer, continue to heat up to 160°C, heat up to 185°C at a rate of 10°C / hour, and keep it warm for 1 hour; 3) Raise the temperature to 218°C at a rate of 10°C / hour, keep it for 2.5 hours until the materials in the reactor are transparent; (4) Cool down to 185°C, add 10 parts of xylene, reflux for 2 hours and start sampling for acid value detection; When the value is 21mgKOH / g, the temperature is lowered to 160℃ and 4 parts of trimellitic anhydride and 4 parts of maleic acid are added; (5) The temperature is increased to 185℃ and the temperature is maintained; when the acid value is 45mgKOH / g, the temperature is lowered, and when the temperature drops to 110 At ℃, add 25 p...

Embodiment 3

[0022] (1) Combine 7 parts of 1,4-butanediol, 17 parts of pentaerythritol, 8 parts of trimellitic anhydride, 7 parts of terephthalic acid, 10 parts of isophthalic acid, 5 parts of sodium adipate, and 0.05 parts of dibutyl tin diacetate. Add parts to the reactor; (2) Fill with nitrogen, under the protection of nitrogen, heat the mixture in the reactor to 110°C in 2 hours, start the stirrer, continue to heat up to 160°C, and heat up to 185 at a rate of 10°C / hour ℃, heat preservation for 1 hour; (3) Use 10 ℃ / hour to heat up to 230 ℃, keep for 2.5 hours until the material in the reactor is transparent; (4) Cool down to 185 ℃, add 14 parts of xylene, reflux for 2 hours and start Sampling and testing the acid value; when the acid value is 21mgKOH / g, the temperature is lowered to 155℃ and 3 parts of trimellitic anhydride are added; (5) The temperature is increased to 170℃ and the temperature is maintained; when the acid value is 48mgKOH / g, the temperature is lowered, and when the tempera...

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PUM

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Abstract

The invention relates to a modified waterborne alkyd resin of organic acid salt and a preparation method thereof. The modified waterborne alkyd resin of organic acid salt is prepared by adopting the following materials: 4 to 9 portions of dihydric alcohol, 10 to 17 portions of polyhydric alcohol, 11 to 23 portions of dibasic acid or anhydride A, 5 to 10 portions of organic acid, 5 to 10 portions of unsaturated acid B, 0.03 to 0.1 portion of esterification catalyst, 3 to 8 portions of trimellitic anhydride, 10 to 20 portions of xylene and 25 to 35 portions of ethylene glycol monobutyl ether; all the portions are weight portions. The modified waterborne alkyd resin of organic acid salt can be dissolved in water directly by neutralization with little alkali; the prepared paint has good storing stability, and is not easy to form flash stain when being used for painting the metal surface; the painted film has fast drying and high hardness; the production technique is simple and the cost is low.

Description

Technical field [0001] The invention relates to an aqueous alkyd resin and a preparation method thereof, in particular to an organic acid salt modified aqueous alkyd resin and a preparation method thereof. Background technique [0002] In recent years, with the restrictions of environmental protection laws and regulations, and the increasing awareness of people's environmental protection, environmentally friendly coatings have received people's attention. The research and application of water-based coatings has become one of the main development directions of the coatings industry. Alkyd resin is the most important coating resin, and its amount has always been the first resin used in the coating industry. Water-soluble alkyd coatings have the advantages of wide sources of raw materials, low prices, low pollution, simple preparation process and equipment, energy saving, diverse varieties and extremely wide uses, and are favored by people. [0003] At present, the preparation of wa...

Claims

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Application Information

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IPC IPC(8): C08G63/52C08G63/78
Inventor 刘寿兵闵长春柳志雄黄超群廖有为
Owner 湘江涂料科技有限公司
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