Method for preparing dipentaerythritol pentaacrylate

An alcohol pentaacrylate and esterification technology, which is applied in the preparation of carboxylate, the preparation of organic compounds, chemical instruments and methods, etc., can solve the problems of inability to meet high-quality products, dark product color, and low product yield. , to achieve the effect of solving the dark color of the product, improving the product yield and high product purity

Inactive Publication Date: 2011-08-10
天津市天骄化工有限公司
View PDF2 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the preparation and production technology of dipentaerythritol pentaacrylate adopts the method of normal pressure esterification, the reaction process is easy to cause material polymerization, the product color is dark, the color number is usually greater than 70, the product yield is low, and the product yield is generally lower than 70%. , cannot meet the needs of preparing and producing high-quality products

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 dipentaerythritol pentaacrylate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] In order to further understand the content of the invention, features and effects of the present invention, the following examples are given hereby, and the details are as follows:

[0013] A preparation method of dipentaerythritol pentaacrylate, comprising the following steps:

[0014] (1) The same as the existing atmospheric pressure esterification method, put the main ingredients dipentaerythritol and acrylic acid into the esterification reaction container, add toluene according to 50-90% of the total mass percentage of dipentaerythritol and acrylic acid, Add p-toluenesulfonic acid at 1.2-4.2% of the total mass percentage of acrylic acid, add phenothiazine according to 0.3-0.5% of the total mass percentage of dipentaerythritol and acrylic acid, stir for 2-9 hours, and carry out esterification reaction to obtain the reaction material ;

[0015] (2) Turn on the vacuum pump on the esterification reaction vessel, control the pressure in the esterification reaction vesse...

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 discloses a method for preparing dipentaerythritol pentaacrylate, which comprises the following steps of: (1) putting main materials of dipentaerythritol and crylic acid into an esterification reaction container, adding a solvent, adding a catalyst and a polymerization inhibitor A, and performing mixing reaction to obtain a reaction material; (2) controlling the pressure in the esterification reaction container to be -0.04 to -0.08MPa, raising the temperature in the esterification reaction container until reflux flows out, keeping the temperature, and beginning cooling to normal temperature until no reflux flows out or an acid value in reaction solution is detected to be 30-50mgKOH / g; (3) transferring the reaction material to a washing container, adding alkali liquor, controlling the pH value of the reaction material to be 7-8, standing until the reaction material is layered, and discharging wastewater on the lower layer; and (4) transferring the reaction material of which the wastewater is removed to a distillation container, adding a polymerization inhibitor B, vacuumizing the distillation container, and distilling to remove methylbenzene to obtain the product. The product is high in purity, good in color, and high in yield.

Description

technical field [0001] The invention relates to a synthesis and preparation technology of chemical products, in particular to a preparation method of dipentaerythritol pentaacrylate, which is suitable for use as a radiation curing reactive diluent. Background technique [0002] At present, the production technology of dipentaerythritol pentaacrylate adopts the method of atmospheric pressure esterification, the reaction process is easy to cause material polymerization, the product color is dark, the color number is usually greater than 70, the product yield is low, and the product yield is generally lower than 70%. , can not meet the needs of preparing and producing high-quality products. Contents of the invention [0003] The invention provides a method for preparing dipentaerythritol pentaacrylate to solve the technical problems in the known technology. The method can reduce the generation of polymers, and the product has light color, high quality and high yield. [0004...

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 Applications(China)
IPC IPC(8): C07C69/54C07C67/08C07C67/62
Inventor 黄凤岐李健
Owner 天津市天骄化工有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap