Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method for preparing pentaerythritol triacrylate

A technology of pentaerythritol triacrylate and pentaerythritol, which is applied in the field of compound synthesis, can solve problems such as low product yield, explosion hazard, and easy pollution of waste water environment, and achieve high product yield and improve product quality.

Active Publication Date: 2015-02-11
TIANJIN JIURI NEW MATERIALS CO LTD
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the preparation process of acid chloride method, there are a large amount of HCL and SO 2 produced, it needs to be absorbed with lye and water, and its waste water is easy to cause pollution to the environment
[0005] In the process of synthesizing acrylate by addition esterification, it is required to directly react alcohol and acetylene under high temperature and pressure, especially acetylene has the risk of explosion and the product yield is low

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing pentaerythritol triacrylate
  • Method for preparing pentaerythritol triacrylate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of pentaerythritol triacrylate, comprising the steps of:

[0031] 1) Put 75g of pentaerythritol, 131g of acrylic acid, 4.5g of solid acid catalyst, and 0.5g of phenothiazine into a 500ml three-necked flask, start stirring, and stir for 2 hours to carry out esterification reaction.

[0032] 2) Turn on the vacuum pump, control the pressure in the reaction flask to 0.05Mpa, and then increase the temperature in the flask to 120°C to generate reflux, and continuously flow out the water generated by the reaction through the water separator. The reaction time is 5 hours, and the reaction is detected The acid value of the solution was 30 mgKOH / g, the temperature was stopped and the temperature was lowered to normal temperature.

[0033] 3) Filter the material, distill off residual acrylic acid and water under the conditions of temperature 98°C and vacuum degree 0.09Mpa. When the acid value is controlled at 0.92mgKOH / g, the distillation can be stopped and th...

Embodiment 2

[0035] A preparation method of pentaerythritol triacrylate, comprising the steps of:

[0036] 1), 75g of pentaerythritol, 131g of acrylic acid, 4.5g of solid acid catalyst, and 0.5g of p-hydroxyanisole were placed in a 500ml three-necked flask, and the stirring was started for 2 hours to carry out the esterification reaction.

[0037] 2) Turn on the vacuum pump, control the pressure in the reaction flask to 0.075Mpa, and then increase the temperature in the flask to 110°C to generate reflux, and continuously flow out the water generated by the reaction through the water separator. The reaction time is 3.5 hours, and the reaction is detected The acid value of the solution was 40 mgKOH / g, and the heating was stopped. Start cooling down to room temperature.

[0038] 3) Filter the material, distill off residual acrylic acid and water under the conditions of temperature 105°C and vacuum degree 0.095Mpa. When the acid value is controlled at 0.76mgKOH / g, the distillation can be stop...

Embodiment 3

[0040] A preparation method of pentaerythritol triacrylate, comprising the steps of:

[0041] 1) Put 75g of pentaerythritol, 131g of acrylic acid, 4.5g of solid acid catalyst, and 0.5g of p-hydroxyanisole in a 500ml three-necked flask, start stirring, and stir for 2 hours to carry out esterification reaction.

[0042] 2) Turn on the vacuum pump, control the pressure in the reaction flask to 0.098Mpa, and then increase the temperature in the flask to 98°C to generate reflux, and continuously flow out the water generated by the reaction through the water separator. The reaction time is 2 hours, and the reaction is detected The acid value of the solution was 50 mgKOH / g, and the heating was stopped. Start cooling down to room temperature.

[0043] 3) Filter the material, distill off the residual acrylic acid and water under the conditions of temperature 115°C and vacuum degree 0.098Mpa. When the acid value is controlled at 0.58mgKOH / g, the distillation can be stopped and the colo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for preparing pentaerythritol triacrylate. The method comprises the following steps that pentaerythritol and acrylic acid are added into an esterification reaction container, then, solid acid catalysts are added, polymerization inhibitors are added, the reaction is carried out under the conditions of certain temperature and vacuum degree, then, solid acid catalysts are filtered out, the remained acrylic acid is removed through distillation, and the pentaerythritol triacrylate is obtained. Compared with the prior art, the method has the beneficial effects that volatile organic compounds are not contained, the product yield is high, the products are environment-friendly green products, no pollution is caused on the environment, and the quality of the products is improved.

Description

technical field [0001] The invention relates to the field of compound synthesis, in particular to a preparation method of pentaerythritol triacrylate, which is suitable for radiation curing reactive diluents. Background technique [0002] The synthesis methods of acrylate reactive diluent mainly include direct esterification method, transesterification method, acid chloride method and addition esterification method. The water generated during the synthesis process is removed by dehydrating agent. Commonly used dehydrating agents include benzene, Toluene, xylene, cyclohexane, etc., are carried away by forming an azeotropic liquid with the water produced in the esterification reaction. Alkanes are expensive and highly volatile; benzene has a low boiling point, high volatility, and toxicity; toluene is slightly less toxic than benzene; xylene has a high boiling point; the use of benzene series solvents has been restricted in industries such as coatings, inks, and adhesives. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C07C67/08C07C69/54
Inventor 黄健文黄凤岐许宝锁
Owner TIANJIN JIURI NEW MATERIALS CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com