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Method for preparing ethoxylated neopentylglycol diacrylate

A technology of pentanediol diacrylate and propoxylation, which is applied in the preparation of carboxylate, the preparation of organic compounds, chemical instruments and methods, etc., can solve the problem of large shrinkage and irritation, large amount of by-products and wastewater , serious environmental impact and other problems, to achieve the effect of low shrinkage and irritation, less by-products and waste water, and low environmental pollution

Inactive Publication Date: 2009-06-24
TIANJIN CHEM REAGENT RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing production methods adopt alkyd direct esterification, although corresponding products can be obtained, there are still the following defects: 1. The product process is complicated, the yield is low, the chroma is high, and the acidity and viscosity are high; 2. Activity and poor flexibility; 3. The shrinkage rate and irritation are large, and it is easy to irritate the human skin; 4. The generated by-products and waste water are large, and the impact on the environment is serious; 5. The production cost is high and the quality is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of propoxylated neopentyl glycol diacrylate, the steps of the preparation method are:

[0033] (1). Put 500g of propylene oxide, 450g of neopentyl glycol, 390g of acrylic acid, 10g of catalyst and 400g of solvent into the reaction kettle, and add polymerization inhibitor hydroquinone 100ppm, p-hydroxyanisole 100ppm, phenothione 50ppm of oxazine, 300ppm of copper sulfate, and 50ppm of decolorizing agent activated carbon are added to the reaction system to form a mixed solution through thorough mixing and stirring;

[0034] (2). Open the steam valve of the reaction kettle to heat slowly, control the heating speed to keep the steam pressure at 0.3Mpa, control the temperature at 70°C within 1h and maintain this temperature for 20 minutes to react;

[0035] (3). Continue to heat the mixture, wait for the temperature to rise to 80°C for 3 hours, then reflux for 5 hours, keep the temperature at 80°C, and the reaction ends;

[0036] (4). Adding a concentra...

Embodiment 2

[0040] A preparation method of propoxylated neopentyl glycol diacrylate, the steps of the preparation method are:

[0041] (1). Put 550g of propylene oxide, 500g of neopentyl glycol, 430g of acrylic acid, 100g of catalyst and 600g of solvent into the reaction kettle, and add 250ppm of polymerization inhibitor hydroquinone and 500ppm of decolorizing agent activated carbon in the reaction The system is fully mixed and stirred to form a mixed solution;

[0042] (2). Open the steam valve of the reaction kettle to heat slowly, control the heating speed to keep the steam pressure at 0.5Mpa, control the temperature at 80°C within 1h and maintain this temperature for 40 minutes to react;

[0043] (3). Continue to heat the mixture, wait for the temperature to rise to 120°C for 4 hours, then reflux for 7 hours, control the temperature at 120°C, and the reaction ends;

[0044] (4). Adding a concentration of 10% soda ash aqueous solution and a concentration of 20% sodium chloride aqueous...

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PUM

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Abstract

The invention belongs to a method for preparing propoxylation neopentylglycol diacrylate ester, comprising the steps as follows: (1) epoxy propane, neopentylglycol, acrylic acid, catalyst, solvent and polymerization inhibitor are put into a reaction kettle to form a mixture; (2) a valve is opened to slowly heat the mixture, and the temperature is controlled and maintained at 60-90 DEG C for a 20-40min reaction; (3) the mixture is continued to be heated to the temperature of 80-120 DEG C to react for 3-4h, then reflow is carried out for 5-7h, and then the reaction is finished; (4) soda water solution and sodium chloride water solution are added into the mixture, and after washing, quiescence and demixing the upper organic phase is extracted; (5) the upper organic phase is separated from the solvent; (6) and then cooling and pressing are carried out to obtain the end product. The method has simple process, high yield coefficient, good activity and flexibility, low color intensity, shrinking percentage and irritation, and good quality, and produces few by-products or little waste water.

Description

technical field [0001] The invention belongs to the field of fine chemicals, in particular to a preparation method of propoxylated neopentyl glycol diacrylate. Background technique [0002] In recent years, the products of traditional industries such as coatings, inks, adhesives, and textiles in various countries in the world have been continuously updated. The rapid development of high-tech industries such as electronics, information, and communications, and the increasingly stringent environmental protection have provided a broad market for the development and application of acrylates. Acrylate is an important raw material for the preparation of radiation-cured products, high-solid coatings, powder coatings, water-soluble resins, polymer flocculants, textile auxiliaries, polymer cross-linking modifiers, and petroleum pour point depressants. Although the output of acrylate is small, its structure is complex and there are many kinds. According to its structure, it can be di...

Claims

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Application Information

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IPC IPC(8): C07C69/734C07C67/08
Inventor 牟国光
Owner TIANJIN CHEM REAGENT RES INST
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