Dehydration process applied to synthesis of alkyd or polyester resin

A technology of polyester resin and alkyd resin, which is applied in the field of dehydration process in the synthesis of alkyd or polyester resin, and can solve the problems of large material loss, harm to human body and environment, and residues of benzene series

Active Publication Date: 2018-08-03
HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two preparation methods, the first melting method and the second solvent method. The melting method has a large material loss and has been basically eliminated. At present, the main preparation method is the solvent method, which has a small material loss and ensures the stability and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 1. Add the dehydrating agent and the raw materials for synthesizing alkyd or polyester resin into the reaction kettle together. During the esterification reaction, the monomers of the esterification reaction are mixed with the dehydrating agent to obtain the esterification product and the dehydrating agent-water azeotrope Object; Wherein, the quality of described dehydrating agent is 3% of described monomer mass, and described dehydrating agent comprises methyl isobutyl ketone;

[0029] Step 2. After the synthesis of the alkyd resin or polyester resin is completed, separate the alkyd resin or polyester resin from the dehydrating agent-water azeotrope, at a temperature of 130° C., a pressure of 0.2 atm, and a reaction time of 2 hours. Obtain acid resin or polyester resin and dehydrating agent-water azeotrope; among them, dehydrating agent is slightly soluble in water, after standing, part of dehydrating agent and water layer, separate to obtain part of dehydrating ag...

Embodiment 2

[0034] Step 1. Add the dehydrating agent and synthetic alkyd or polyester resin raw materials into the reaction kettle together. When carrying out the esterification reaction, mix the monomers of the esterification reaction with the dehydrating agent to obtain the esterification product and the dehydrating agent-water azeotrope Object; Wherein, the quality of described dehydrating agent is 6% of described monomer mass, and described dehydrating agent comprises methyl isobutyl ketone;

[0035]Step 2. After the synthesis of the alkyd resin or polyester resin is completed, separate the alkyd resin or polyester resin from the dehydrating agent-water azeotrope, at a temperature of 150° C., a pressure of 0.3 atm, and a reaction time of 3 hours. Obtain acid resin or polyester resin and dehydrating agent-water azeotrope; among them, dehydrating agent is slightly soluble in water, after standing, part of dehydrating agent and water layer, separate to obtain part of dehydrating agent and...

Embodiment 3

[0040] Step 1. Add the dehydrating agent and the raw materials for synthesizing alkyd or polyester resin into the reaction kettle together. During the esterification reaction, the monomers of the esterification reaction are mixed with the dehydrating agent to obtain the esterification product and the dehydrating agent-water azeotrope Object; Wherein, the quality of described dehydrating agent is 5% of described monomer mass, and described dehydrating agent comprises methyl isobutyl ketone;

[0041] Step 2. After the synthesis of the alkyd resin or polyester resin is completed, separate the alkyd resin or polyester resin from the dehydrating agent-water azeotrope, at a temperature of 140° C., a pressure of 0.2 atm, and a reaction time of 2.5 hours. Obtain acid resin or polyester resin and dehydrating agent-water azeotrope; among them, dehydrating agent is slightly soluble in water, after standing, part of dehydrating agent and water layer, separate to obtain part of dehydrating ...

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PUM

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Abstract

The invention provides a dehydration process applied to the synthesis of alkyd or polyester resin. The dehydration process comprises a dehydration step. According to the dehydration step, monomers foresterification are mixed with a dehydrating agent so as to obtain an esterification product and a dehydrating agent-water azeotrope; the mass of the dehydrating agent accounts for 3 to 6% of the massof the monomers; and the dehydrating agent comprises methyl isobutyl ketone. The dehydration process of the invention utilizes the dehydrating agent containing methyl isobutyl ketone to remove waterproduced in esterification and does not affect the synthesis of the alkyd or polyester resin; and the residual amount of the dehydrating agent in the alkyd or polyester resin is low, as low as no morethan 0.03%.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, in particular to a dehydration process applied in the synthesis of alkyd or polyester resin. Background technique [0002] The synthesis of alkyd resin and polyester is an esterification reaction, which will generate part of water. If the reaction is to continue, the water must be removed to further complete the esterification. There are two preparation methods, the first melting method and the second solvent method. The melting method has a large material loss and has been basically eliminated. At present, the main preparation method is the solvent method, which has a small material loss and ensures the stability and accuracy of the formula to a higher degree. However, since xylene is used as the dehydration solvent at present, there will be xylene residue after the synthesis, the finished resin product has a strong smell, and the residue of benzene series will cause harm to the human...

Claims

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Application Information

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IPC IPC(8): C08G63/78
CPCC08G63/78
Inventor 郭晓猛李春雨刘东胡中源董立志
Owner HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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