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Method for preparing dipropylene glycol diacrylate

A dipropylene glycol diacrylate esterification technology, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, and can solve problems such as lack of synthesis process conditions, non-compliance with the development trend of green chemical industry, and serious pollution.

Inactive Publication Date: 2020-11-24
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in terms of the synthesis of dipropylene glycol diacrylate, there are more researches abroad, and it is still in the development stage in China, lacking mature synthesis process conditions
And the commonly used catalyst is concentrated sulfuric acid, which is seriously polluted and does not conform to the current development trend of green chemical industry

Method used

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  • Method for preparing dipropylene glycol diacrylate
  • Method for preparing dipropylene glycol diacrylate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Ion exchange resin 10g, add distilled water 50mL and wash 5 times, then add 50ml 15% sulfuric acid and soak for 6 hours, filter, then wash 5 times with distilled water 50mL, filter, and vacuum dry for 8 hours to obtain ion exchange resin catalyst 11.1g.

Embodiment 2

[0017] A stirred 500ml glass reaction bottle was replaced with nitrogen three times, dipropylene glycol 134g, acrylic acid 144g; ion exchange resin 20g; hydroquinone 0.9g; toluene 10ml, cyclohexane 20ml, and the reaction temperature was 100°C; The reaction time is 2 hours, distilled under reduced pressure at 100° C. for about 1 hour, and filtered to obtain dipropylene glycol diacrylate with a yield of 78%.

Embodiment 3

[0019] Replace the stirred 500ml glass reaction bottle with nitrogen three times, add 134g of dipropylene glycol, 144g of acrylic acid; 20g of ion exchange resin; 0.9g of hydroquinone; 10ml of toluene, 20ml of cyclohexane, and the reaction temperature is 150°C ; The reaction time is 2 hours, distilled under reduced pressure at 100° C. for about 1 hour, and filtered to obtain dipropylene glycol diacrylate with a yield of 84%.

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Abstract

The invention discloses a method for preparing dipropylene glycol diacrylate. According to the method, ion exchange resin soaked with sulfuric acid is used as a catalyst, a polymerization inhibitor ishydroquinone, and a toluene / cyclohexane mixture is used as a water-carrying agent obtained by a direct esterification method, wherein the molar ratio of acrylic acid to dipropylene glycol is (1.2-3):1.0; the dosage of the catalyst is 5-8%; the dosage of the polymerization inhibitor is 0.2-0.5%; under the conditions that the reaction temperature is 100 to 160 DEG C and the reaction time is 2 to 8hours, the product yield reaches 87 percent. According to the method, the pollution of a strong acid catalyst is avoided, and the purification step of the dipropylene glycol diacrylate is simplified.

Description

technical field [0001] The invention relates to a method for preparing dipropylene glycol diacrylate. Background technique [0002] Dipropylene glycol diacrylate is a new type of light-curing material developed in recent years. Because it has many methyl branched chains, it has superior leveling properties, low viscosity, good compatibility with paint resins, and good dilution. With the advantages of low volatility and fast curing speed, it is mainly used as a reactive diluent and crosslinking agent in radiation curing systems. Dipropylene glycol diacrylate uses ultraviolet light to pass through the substance, causing internal crosslinking of the substance, no waste discharge, and no pollution to the environment, so it is called "green technology" and can be used as a resin crosslinking agent, plastic, rubber modifier, and widely used Used in sealants, solder resist inks, photoresists, inks, coatings, dry films, packaging adhesives and other fields. [0003] In recent year...

Claims

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Application Information

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IPC IPC(8): C07C67/08C07C69/54
CPCC07C67/08C07C69/54
Inventor 曹晨刚
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY