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Method for producing unsaturated polyester resin by using glycerinum

A polyester resin and unsaturated technology, which is applied in the field of producing unsaturated polyester resin, can solve the problems of unsaturated resin market competitiveness, unsaturated resin production cost increase, etc., and achieve excellent chemical corrosion resistance and excellent mechanical properties , the effect of a wide range of sources

Inactive Publication Date: 2014-07-30
WUQIAO HAOTONG RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the conventional production of unsaturated resin at this stage, most of the raw materials used come from the petrochemical industry, but petroleum resources are non-renewable resources. With the reduction of oil reserves, the price of petrochemical products has risen sharply, and the production of unsaturated resin The cost is also increasing day by day, which has a great impact on the market competitiveness of unsaturated resins

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Use a 1000ml four-necked ground flask as a reaction kettle, install a thermometer, an electric stirrer, a nitrogen inlet pipe and a fractionation device respectively, and drop in 40g of glycerol, 40g of benzoic acid and 0.4g of zinc acetate catalyst successively. Slowly heat up, and start to keep warm when the kettle temperature reaches 200°C. After the measured acid value is below 10mgKOH / g, start to cool down to 130°C, and put in two-step materials: 20g of propylene glycol, 60g of diethylene glycol, 54g of phthalic anhydride, 70g of maleic anhydride, 0.2g of triphenyl phosphite, and 0.04g of hydroquinone . Then gradually heat up under the situation of feeding nitrogen, and the temperature of the distillation head is controlled below 105°C. When the temperature of the kettle reaches 200-205°C, the heat preservation reaction starts, and the acid value is controlled below 50mgKOH / g, and the vacuum is started until the acid value is lower than 35mgKOH / g. Lower the mater...

Embodiment 2

[0025] The reaction device is the same as Example 1. 70g of glycerin, 74.4g of benzoic acid, and 0.72g of zinc acetate are fed in one step; 20g of propylene glycol, 50g of diethylene glycol, 54g of phthalic anhydride, and 70g of maleic anhydride are fed in the second step; 133g of styrene is fed. Other steps are operated in the same steps as in Example 1.

Embodiment 3

[0027] The reaction device is the same as Example 1. 56g of glycerin, 54g of benzoic acid, and 0.6g of zinc acetate are fed in one step; 16g of propylene glycol, 40g of diethylene glycol, 54g of phthalic anhydride, and 70g of maleic anhydride are fed in the second step; 133g of styrene is fed. Other steps are operated in the same steps as in Example 1.

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Abstract

The invention discloses a method for producing unsaturated polyester resin by using glycerinum. The method adopts the following concrete steps: (1) feeding glycerinum, a monobasic acid and an organic tin catalyst to a reaction kettle according to the proportion, and slowly heating up; (2) cooling, feeding other dihydric alcohols and unsaturated dicarboxylic acid to the reaction kettle, and slowly heating up; (3) vacuumizing until the acid value is reduced to below 35mgKOH / g, cooling and adding a polymerization inhibitor; (4) adding styrene, controlling at 70-90 DEG to agitate, cooling, filtering and discharging; and (5) cooling after reaction is ended, and infiltrating formula weight of styrene to a dilute kettle and adding assistants such as copper naphthenate and the like, pressing polyester into the dilute kettle, continuing to agitate after swaging is finished, and packaging if being qualified. The method has the advantages that the cost is saved, and the quality is improved by adopting glycerinum, the method is low in glycerinum price and wide in source, not only is dependence of unsaturated resin industry on petroleum industry reduced, but also pollution to the environment is reduced.

Description

technical field [0001] The invention belongs to the field of chemical product processing, and in particular relates to a method for producing unsaturated polyester resin. Background technique [0002] Unsaturated polyester resin is generally a linear polymer with ester bonds and unsaturated double bonds formed by polycondensation of diols, saturated dibasic acids and unsaturated dibasic acids. The polymer is mixed with diluent benzene Ethylene is mixed to form different types of unsaturated polyester resins. Unsaturated polyester resin has excellent process performance, can be cured at room temperature, molded under normal pressure, and has flexible process performance, especially suitable for large-scale and on-site manufacturing of FRP products. After curing, the overall performance of the resin is good, and the mechanical performance index is slightly lower than that of epoxy resin, but better than that of phenolic resin. Corrosion resistance, dielectric properties and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01C08F212/08C08G63/676C08G63/78
Inventor 刘冬霞武广文吴凤煊
Owner WUQIAO HAOTONG RESIN
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