Synthesis method of toughened unsaturated polyester resin for road sign coating

A technology of polyester resin and synthesis method, which is applied in the direction of polyester paint and coating, can solve the problems of high requirements, high construction cost, complex construction equipment and process, etc., and achieve easy control, simple method and excellent durability Effect

Inactive Publication Date: 2015-02-04
重庆市大足区众科管道设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also problems such as high requirements on road conditions, weather and other conditions, complex construction equipment and processes, and high construction costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] A method for synthesizing tough unsaturated polyester resin for road marking paint, comprising the steps of:

[0018] Add phthalic anhydride, alcohol and catalyst according to the test formula in the four-necked flask equipped with stirrer, thermometer, air duct and water separator;

[0019] First heat the system, start stirring, raise the liquid temperature, and when the acid value drops below the preset value, lower the temperature, add maleic anhydride, gradually raise the temperature, and keep warm;

[0020] Heat up the reaction until no water evaporates, vacuumize, add polymerization inhibitor and polyethylene wax, cool down and add cross-linking agent, mix evenly, and discharge to obtain unsaturated polyester resin.

Embodiment 1

[0022] In a four-neck flask equipped with a stirrer, a thermometer, an air duct and a water separator, add phthalic anhydride, alcohol and a catalyst in a volume ratio of 1:1:1; first heat the system to 90°C and start Stir, raise the liquid temperature to 160°C, when the acid value drops to 100mgKOH / g, lower the temperature to 50°C, add maleic anhydride, gradually increase the temperature to 170°C, keep it warm for 0.5h; raise the temperature to 220°C until no Until the water evaporates, vacuumize for 0.5h, add a polymerization inhibitor and polyethylene wax at 100°C, add a crosslinking agent when the temperature is lowered to 60°C, mix well, and discharge to obtain an unsaturated polyester resin.

Embodiment 2

[0024] In a four-neck flask equipped with a stirrer, a thermometer, an air duct and a water separator, add phthalic anhydride, alcohol and a catalyst in a volume ratio of 1:2:1; first heat the system to 95°C and start Stir, raise the liquid temperature to 165°C, when the acid value drops to 80mgKOH / g, lower the temperature to 70°C, add maleic anhydride, gradually increase the temperature to 175°C, keep it warm for 0.6h; raise the temperature to 223°C until no Until the water evaporates, vacuumize for 0.8h, add polymerization inhibitor and polyethylene wax at 110°C, add crosslinking agent when the temperature is lowered to 68°C, mix evenly, and discharge to obtain unsaturated polyester resin.

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PUM

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Abstract

The invention relates to a synthesis method of toughened unsaturated polyester resin for road sign coating. The synthesis method comprises the following steps: adding phthalic anhydride, alcohol and a catalyst to a four-necked flask provided with a stirrer, a thermometer, a gas guide pipe and a water konckout vessel according to an experiment formula; firstly heating up the system, starting stirring, raising the temperature of a liquid, cooling when the acid value drops to be below a preset value, then adding maleic anhydride, gradually increasing the temperature and keeping the temperature; heating up for reaction until no water is evaporated out, vacuumizing, adding a polymerization inhibitor and polyethylene wax, cooling, adding a cross-linking agent, uniformly mixing and finally discharging, thus obtaining the unsaturated polyester resin. The synthesis method is simple and is easy to control; coating prepared from the synthesized unsaturated polyester resin has excellent durability, rapid dryness performance, high night visibility and the like and the synthesized unsaturated polyester resin can effectively meet the characteristic requirements of road sign coating.

Description

technical field [0001] The invention relates to a synthesis technology of paint preparation raw materials, in particular to a synthesis method of tough unsaturated polyester resin for road marking paint. Background technique [0002] Road marking is the most basic and effective part of traffic management facilities. It is one of the ways to effectively guide vehicles to regulate driving. It can significantly reduce traffic accidents and greatly improve traffic efficiency. Road marking paint is a paint that is brushed on the road surface to indicate traffic. At present, it can be divided into four categories: solvent-based, hot-melt, two-component and water-based paints. Solvent-based marking paint has the advantages of convenient construction, strong adaptability and low price. However, this type of paint will release a large amount of solvent during use, pollute the environment, and the paint film has a long drying time and poor wear resistance. Although the hot-melt mark...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/52C08G63/78C09D167/06
Inventor 吴礼才
Owner 重庆市大足区众科管道设备有限公司
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