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Waterborne polyester resin and preparation method as well as functional auxiliary agent based on waterborne polyester resin

A technology of water-based polyester resin and trimethylolpropane, applied in the field of water-based polyester resin, can solve the problems of high gloss, unsatisfactory weather resistance, insufficient adhesion of water-based paint coating, etc. Effect

Inactive Publication Date: 2017-05-31
HAOLISEN CHEM TECH (JIANGSU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The lack of adhesion of existing water-based paint coatings, especially in metal surface coating and decoration, and its good water solubility, stability, high gloss, and weather resistance are not ideal

Method used

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  • Waterborne polyester resin and preparation method as well as functional auxiliary agent based on waterborne polyester resin

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preparation example Construction

[0021] On the other hand, the present invention provides a kind of preparation method of waterborne polyester resin, comprises the following steps;

[0022] Add 25-30g neopentyl glycol, 15-18g trimethylolpropane, 18-22g sodium isophthalic acid-5-sulfonate, 25-30g adipic acid and 0.05-0.08g dibutyltin oxide into the belt In the reaction vessel of the stirrer and the condenser, pass nitrogen gas, slowly raise the temperature to 130°C to melt the material completely, then raise the temperature to 170°C, keep it warm for 1 hour, then raise the temperature to 210°C at a heating rate of 10°C / h, and keep it Temperature esterification until the acid value (KOH) reaches 5-8 mg / g;

[0023] Then cool down to 180°C, add 5-8g of hexahydrophthalic acid, heat up to 200°C for constant temperature esterification for 2 hours, wait until the acid value (KOH) reaches 30-35 mg / g, and the hydroxyl value (KOH) reaches 60-70 mg / g Finally, lower the temperature to below 100°C and add 12-15g ethylene ...

Embodiment 1

[0026] The invention provides a water-based polyester resin, which is composed of the following raw materials: 15g of trimethylolpropane, 25g of neopentyl glycol, 18g of isophthalic acid-5-sodium sulfonate, 25g of adipic acid, and phthalic acid 5g, ethylene glycol butyl ether 12g, sec-butanol 8g, dibutyltin oxide 0.05g, dimethylethanolamine 8g.

[0027] The invention provides a kind of preparation method of waterborne polyester resin, comprises the following steps;

[0028] Add 25g of neopentyl glycol, 15g of trimethylolpropane, 18g of isophthalic acid-5-sodium sulfonate, 25g of adipic acid and 0.05g of dibutyltin oxide into a reaction vessel with a stirrer and a condenser tube, Through nitrogen, slowly raise the temperature to 130°C to melt the material completely, then raise the temperature to 170°C, keep it warm for 1 hour, then raise the temperature to 210°C at a heating rate of 10°C / h, and keep this temperature for esterification until the acid value (KOH) up to 5mg / g; ...

Embodiment 2

[0031] The invention provides a water-based polyester resin, which is composed of the following raw materials: 18g of trimethylolpropane, 30g of neopentyl glycol, 22g of isophthalic acid-5-sodium sulfonate, 30g of adipic acid, and phthalic acid 8g, ethylene glycol butyl ether 15g, sec-butanol 10g, dibutyltin oxide 0.08g, dimethylethanolamine 10g.

[0032] The invention provides a kind of preparation method of waterborne polyester resin, comprises the following steps;

[0033] 30g of neopentyl glycol, 18g of trimethylolpropane, 22g of isophthalic acid-5-sodium sulfonate, 30g of adipic acid and 0.08g of dibutyltin oxide are added to a reaction vessel with a stirrer and a condenser tube, Through nitrogen, slowly raise the temperature to 130°C to melt the material completely, then raise the temperature to 170°C, keep it warm for 1 hour, then raise the temperature to 210°C at a heating rate of 10°C / h, and keep this temperature for esterification until the acid value (KOH) up to 8m...

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Abstract

The invention provides waterborne polyester resin. The waterborne polyester resin is prepared from the following raw materials in parts by weight: 15 to 18 parts of trimethylol propane, 25 to 30 parts of neopentyl glycol, 18 to 22 parts of m-phthalic acid-5-sodium sulfonate, 25 to 30 parts of adipic acid, 5 to 8 parts of hexahydro-phthalic acid, 12 to 15 parts of 2-butoxy ethanol, 8 to 10 parts of sec-butyl alcohol, 0.05 to 0.08 part of dibutyltin oxide and 8 to 10 parts of dimethylethanolamine. The waterborne polyester resin mainly comprises a cyclic binary acid emulsified group monomer introduced with a non-benzene ring, so that the water solubility is improved; meanwhile, a waterborne functional monomer, namely the m-phthalic acid-5-sodium sulfonate, is directly introduced into a main chain to obtain the waterborne polyester resin; the invention further provides a production method of the waterborne polyester resin and a functional auxiliary agent based on the waterborne polyester resin.

Description

technical field [0001] The invention belongs to the technical field of water-based paint functional additives and preparation methods, and relates to a water-based polyester resin. Background technique [0002] In recent years, as the requirements of automobile coating technology have become higher and higher, the amount of polyester resin coatings in the industry has increased year by year due to its excellent performance. At present, the polyester resins used are mainly solvent-based. Today, when low-carbon environmental protection is advocated, water-based polyester is bound to become the research and development of environmental protection coatings in the 21st century due to its excellent performance and low VOC emissions. [0003] Waterborne polyester resin has the following advantages: [0004] ①Excellent hardness and flexibility balance; [0005] ②Due to the polarity relationship, it has excellent interlayer adhesion to the substrate and composite coating, and has g...

Claims

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Application Information

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IPC IPC(8): C08G63/688C08G63/78C09D7/12C09D5/08
CPCC08G63/6884C08G63/78C09D5/08C09D7/65
Inventor 胡浩东刘薇薇苏献兰刘铭周晋生贾龙娟徐庆
Owner HAOLISEN CHEM TECH (JIANGSU) CO LTD
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