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Preparation method of water soluble polyester resin and its amino baking varnish

A polyester amino baking paint, water-soluble polyester technology, used in polyester coatings, coatings and other directions, can solve the problems of poor heat resistance, poor storage stability of water-based polyester, etc., to improve water resistance and good water resistance , the effect of improving heat resistance

Inactive Publication Date: 2013-12-25
JIAXING QINGHE GAOLI INSULATION MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN 1315985 A prepares water-based polyester resin by phase inversion emulsification of polyester containing sulfonate groups and water-insoluble polyester, and the storage stability of water-based polyester prepared by this method is relatively poor
Chinese patent CN 102887993 A adopts isophthalic acid-5-sodium sulfonate and introduces a certain amount of sulfonate groups to prepare water-based polyester for coil coatings. The water-soluble polyester resin prepared by this method is Improved water resistance and storage stability, but poor heat resistance

Method used

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  • Preparation method of water soluble polyester resin and its amino baking varnish
  • Preparation method of water soluble polyester resin and its amino baking varnish
  • Preparation method of water soluble polyester resin and its amino baking varnish

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of water-soluble polyester resin A1:

[0042] Add 235 g neopentyl glycol, 51 g trimethylolpropane, 29 g tris-hydroxyethyl isocyanurate, 59 g sodium-5-sulfonate isophthalate, 105 g isophthalic acid and 0.5 g butyltin triisooctoate In the reaction bottle, after 10--20 minutes of nitrogen gas, start to heat up; when the temperature rises to 120°C, the material melts and starts to stir; continue to heat up to 200°C, and keep reacting at this temperature until the material system becomes clear and the acid value Lower the temperature after it is less than 50mgKOH / g; when the temperature drops to 160°C, add 127g of adipic acid, 105g of isophthalic acid and 0.5g of butyltin triisooctoate, continue to heat up to 200°C, and keep at this temperature for reaction until After the acid value is 10mgKOH / g, cool down; when the temperature drops to 170°C, add 58g of glycidyl tert-carbonate (E-10P) and react at this temperature until the acid value is less than 2mgKOH / g, the...

Embodiment 2

[0044] Preparation of water-soluble polyester resin A2:

[0045] Add 235 g neopentyl glycol, 51 g trimethylolpropane, 29 g trishydroxyethyl isocyanurate, 20 g sodium 5-sulfonate isophthalate, 115 g isophthalic acid and 0.5 g butyltin triisooctoate In the reaction bottle, after 10--20 minutes of nitrogen gas, start to heat up; when the temperature rises to 120°C, the material melts and starts to stir; continue to heat up to 200°C, and keep reacting at this temperature until the material system becomes clear and the acid value Lower the temperature after less than 50mgKOH / g; when the temperature drops to 160°C, add 127g of adipic acid, 115g of isophthalic acid and 0.5g of butyltin triisooctoate, continue to heat up to 200°C, and keep at this temperature for the reaction until After the acid value is 10mgKOH / g, cool down; when the temperature drops to 170°C, add 58g of glycidyl tert-carbonate (E-10P) and react at this temperature until the acid value is less than 2mgKOH / g, then c...

Embodiment 3

[0047] Preparation of water-soluble polyester resin A3:

[0048] Add 235g of neopentyl glycol, 51g of trimethylolpropane, 21g of isophthalic acid-5-sodium sulfonate, 118g of isophthalic acid and 0.5g of butyltin triisooctanoate into the reaction flask, and pass nitrogen gas for 10--20min. , start to heat up; when the temperature rises to 120°C, the material melts and starts to stir; continue to heat up to 200°C, and keep it at this temperature for reaction until the material system becomes clear and the acid value is less than 50mgKOH / g, then cool down; when the temperature drops to At 160°C, add 127g of adipic acid, 118g of isophthalic acid and 0.5g of butyltin triisooctoate, continue to heat up to 200°C, and keep reacting at this temperature until the acid value is 10mgKOH / g, then cool down; cool down to At 150°C, add 200g of ethylene glycol butyl ether to obtain water-soluble polyester resin A3. The water-soluble polyester resin is a transparent viscous liquid, its solid c...

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Abstract

The invention relates to a water soluble polyester resin, which is synthesized according to the formula of (by weight percentage): 25%-30% of diol or polyol; 2%-4% of a heatproof functional monomer; 30%-40% of polycarboxylic acid or anhydride; 1%-6% of a sulfonate based hydrophilic monomer; 5%-7% of a glycidyl ester compound; 0.01%-0.2% of a catalyst; and 20%-30% of a cosolvent. The waterborne polyester amino baking varnish based on the water soluble polyester resin involved in the invention has the advantages of: (1) good storage stability; (2) good heat resistant performance; (3) excellent water resistance and rust resistance; and (4) safe and convenient use.

Description

technical field [0001] The invention relates to a preparation method of a water-soluble polyester resin, and at the same time, also relates to a preparation method of preparing a water-based polyester amino baking varnish by using the water-soluble polyester resin as a base material. Background technique [0002] According to statistics, more than 1 million tons of organic solvents are discharged into the atmosphere every year in my country's paint coating industry, which not only causes a lot of waste of organic solvents, but also causes serious pollution to the environment. In order to save resources and protect the environment, people have turned their attention to non-pollution or low-pollution water-based coatings. [0003] As an important class of coating resins, polyester resins are widely used in the field of metal protection due to their excellent mechanical properties and weather resistance. The hydroxyl and carboxyl groups on the polyester resin molecules can und...

Claims

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Application Information

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IPC IPC(8): C08G63/688C08G63/78C09D167/02C09D161/32
Inventor 葛志有葛春葛民徐怡瑾
Owner JIAXING QINGHE GAOLI INSULATION MATERIAL
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