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Method for preparation of water-based UV-curing unsaturated polyester by solvent azeotropy

A solvent azeotropic and unsaturated technology, used in polyester coatings, coatings, etc., can solve the problems affecting the hardness, gloss and scratch resistance of the paint film, affecting the long-term stability of the coating, and achieve easy recycling. Processing, curing speed, high gloss effect

Inactive Publication Date: 2015-05-06
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oxygen inhibition can eventually lead to a large number of oxidative structures such as hydroxyl groups, carbonyl groups, and peroxyl groups on the surface of the coating, thereby affecting the long-term stability of the coating, and may even affect the hardness, gloss, and scratch resistance of the cured paint film. performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 (one of the method that adopts solvent azeotropic method):

[0029] A method for preparing water-based photocurable unsaturated polyester by solvent azeotropy (one of the methods using solvent azeotropic method), which comprises the following steps:

[0030] 1) Under the protection of nitrogen, 33.00g trimethylolpropane monoallyl ether, 9.23g neopentyl glycol (polyol), 17.53g dimethylol propionic acid, 15.00g suberic acid (saturated Dibasic acid), 12.00g maleic anhydride [unsaturated anhydride containing carbon-carbon double bond (excluding benzene ring)], 15.00g adipic acid (saturated dibasic acid), 0.26g antioxidant and 5g dibasic acid Toluene was added to a four-port reactor equipped with a stirrer, condenser, thermometer and dripping device.

[0031]2) Raise the temperature to 140°C and keep it warm for 1 hour, then raise the temperature to 150°C and keep it warm for 1 hour (keep reflux in this state without draining). Then take 1 hour to raise the te...

Embodiment 2

[0044] A method for preparing water-based photocurable unsaturated polyester by solvent azeotropy (method 2 using solvent azeotropic method), which comprises the following steps:

[0045] 1) Under the protection of nitrogen, 20.00g trimethylolpropane monoallyl ether, 10.00g neopentyl glycol, 12.00g dimethylolpropionic acid, 11.00g suberic acid, 9.00g maleic anhydride, 15.00g of adipic acid, 0.26g of antioxidant and 6g of xylene were added to the four-port reactor with stirrer, condenser, thermometer and dripping device.

[0046] 2) Raise the temperature to 140°C, keep it warm for 1 hour, then raise the temperature to 150°C, and keep it warm for 1 hour (in this state, keep reflux without draining). Then take 1 hour to raise the temperature to 180°C, then add 9.00g of maleic anhydride, and keep it warm for 2 hours (and keep the reaction at this temperature); you can properly increase the amount of nitrogen to facilitate drainage, and react until the acid value reaches 110.

[0...

Embodiment 3

[0059] A method for preparing water-based photocurable unsaturated polyester by solvent azeotropy (one of the methods using solvent azeotropic method), which comprises the following steps:

[0060] 1) Under the protection of nitrogen, 20.00g trimethylolpropane monoallyl ether, 14.50g neopentyl glycol, 9.00g dimethylolpropionic acid, 16.50g suberic acid, 15.00g maleic anhydride, 15.00g of adipic acid, 0.26g of antioxidant and 6g of xylene were added to the four-port reactor with stirrer, condenser, thermometer and dripping device.

[0061] 2) Raise the temperature to 140°C and keep it warm for 1 hour, then raise the temperature to 150°C and keep it warm for 1 hour (keep reflux in this state without draining). Then use 1h to raise the temperature to 180°C, and keep it warm for 2h (and keep the reaction at this temperature). It is possible to appropriately increase the amount of nitrogen to facilitate drainage, and react until the acid value reaches 90.

[0062] 3) Cool down to...

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PUM

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Abstract

The invention relates to a synthesis method of water-based unsaturated polyester with a UV (ultraviolet) curing property. The method is characterized by comprising the steps of: 1) under protection of nitrogen, subjecting 40-60 parts by mass of a polyol mixture, 40-60 parts by mass of a polyacid mixture, 0.1-0.3 part by mass of an antioxidant and 4-8 parts by mass of an inert solvent to solvent azeotropy; 2) raising the temperature to 140DEG C, conducting thermal preservation for 1h, then raising the temperature again to 150DEG C, performing thermal preservation for 1h; and then raising the temperature to 180DEG C in 1h, and implementing thermal preservation for 2h; 3) lowering the temperature to 150DEG C, and adding 0.2-0.5 part by mass of a polymerization inhibitor; adding 7-15 parts by mass of glycidyl methacrylate into the reactor in a dropwise manner, and adding 0.1-0.3 part by mass of tetramethylammonium iodide; lowering the temperature to 65DEG C, adding a neutralizer for neutralization till a product with a PH value of 7-8; and stirring the product, and adding water to dilute the product, with the added water accounting for 50%-200% of the mass of the product, thus obtaining the water-based UV-curing unsaturated polyester. The polyester prepared by the method provided in the invention has the characteristics of good stability and the like.

Description

technical field [0001] The invention relates to a method for synthesizing a class of water-based unsaturated polyester with ultraviolet light curing properties. Background technique [0002] Since the German Bayer company developed the first generation of UV-curable coatings (UVCC) in the 1960s, because this technology fully complies with the 3E principle, it has fast curing speed, no volatile solvents, energy saving, low cost, and automatic production. characteristics, has maintained a rapid development. Since oligomers, the main components used in photocurable coating systems, generally have high viscosity, more reactive diluents must be added to adjust viscosity and improve rheology before use, and most of these reactive diluents are toxic and irritating. On the other hand, with the gradual improvement of people's awareness of environmental protection and the stricter environmental protection regulations of various countries, water-based coatings have become one of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/06C08G63/52C08G63/676
Inventor 闫福安严晶
Owner WUHAN INSTITUTE OF TECHNOLOGY
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