Method for producing triacrylic ester of alkoxylating trimethylolpropane

A technology of alkoxylated trimethylolpropane triacrylate and alkoxylated trimethylolpropane, which is applied in the field of alkoxylated trimethylolpropane triacrylate and can solve the problem of low color number, Problems such as low yield, to achieve the effect of reducing production cost, improving yield and preventing polymerization

Active Publication Date: 2007-12-26
NANTONG BAICHUAN NEW MATERIAL CO LTD +1
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AI Technical Summary

Problems solved by technology

Therefore, the yield of the alkoxylated trimethylolpropane triacrylate generated by the current production method is relatively low, generally less than 85%, and the color number of the product is difficult to achieve a lower level

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take by weighing 600kg color number and be No. 60 EO3-TMP (addition degree is the ethoxylated trimethylolpropane of 3), slowly dissolve in 500kg toluene under the situation of stirring, then pump into 5000 liters of in the reactor. Turn on the steam switch slightly, and heat the reactor to 70-80°C. With stirring, 35 kg of benzenesulfonic acid, 15 kg of p-hydroxyanisole, 15 kg of activated carbon, and then a total of 500 kg of acrylic acid were added slowly. During the period, closely observe the situation of the reaction system to prevent the reaction system from performing violent reactions in advance.

[0021] Control the amount of steam used, and carefully raise the temperature of the reactor to 105-115°C, while feeding 1.2L / min of air. According to the situation of the esterification reaction, gradually add the toluene at the remaining 400kg normal temperature, so that the reaction will not be too violent. The water generated by the esterification reaction is tak...

Embodiment 2

[0027] Weigh 500kg of PO3-TMP (propoxylated trimethylolpropane with an addition degree of 3) whose color number is No. 20, slowly dissolve in 540kg toluene while stirring, and heat to the The trimethylolpropane is completely dissolved, and then pumped into a 5000-liter reactor. Turn on the steam switch slightly, and heat the reactor to 70-80°C. With stirring, 24 kg of p-toluenesulfonic acid, 8 kg of hydroquinone, 8 kg of copper sulphate, and then slowly a total of 360 kg of acrylic acid were added. During the period, closely observe the situation of the reaction system to prevent the reaction from proceeding prematurely and excessively.

[0028] Control the amount of steam used, and carefully raise the temperature of the reactor to 90-110°C, while feeding 0.6L / min of oxygen. According to the situation of the esterification reaction, gradually add the toluene at the remaining 600kg normal temperature, so that the reaction will not be too violent. The water generated by the e...

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Abstract

This invention relates to a method for producing alkoxylated trimethylolpropane tris-acrylate. The method comprises: dissolving alkoxylated trimethylolpropane into part of water-carrying agent, adding catalyst, polymerization inhibitor and acrylic acid, introducing 0.5-1.5 L/min air or oxygen, adding the rest normal-temperature water-carrying agent into the reaction kettle, collecting the azeotrope of water-carrying agent and water into a metered glass container, demixing, refluxing for 3.5-4.5 h, pumping the reaction solution into a neutralization kettle, adding soda solution for neutralization, washing with water until the pH value is 6-8, standing for demixing, transferring the upper layer organic phase into a distillation kettle, adding polymerization inhibitor, distilling, purifying to obtain alkoxylated trimethylolpropane tris-acrylate, stopping distillation when the content of polymerization inhibitor is below 300 ppm, and vacuum-filtering to obtain the product. The method has a high yield, and the chroma of the product is lower than 50# of Pt-Co color mark.

Description

technical field [0001] The invention relates to a production method of alkoxylated trimethylolpropane triacrylate. In particular, it relates to a method for esterifying alkoxylated trimethylolpropane and acrylic acid in the presence of acidic catalysts, polymerization inhibitors and water-carrying agents to generate alkoxylated trimethylolpropane triacrylate . It belongs to the field of organic chemical technology. Background technique [0002] Alkoxylated trimethylolpropane triacrylate is an acrylic modified polyol ester with three reactive functional groups, which belongs to the second generation of reactive diluents for photocurable coatings. It introduces a flexible chain in the molecule, which not only has high activity and high solvency in performance, but also has a small shrinkage rate of the cured film, good flexibility, strong adhesion to the substrate, and little irritation to the skin. Better than the first generation of light-curing diluents, such as: trimeth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/54C09D7/12
Inventor 郑铁江薛建军
Owner NANTONG BAICHUAN NEW MATERIAL CO LTD
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