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A (methyl) higher aliphatic acrylate preparation method

A technology of higher fatty alcohols and fatty alcohol esters, which is applied in the preparation of carboxylic acid esters, the preparation of organic compounds, chemical instruments and methods, etc. rate reduction, etc.

Active Publication Date: 2007-11-21
SHANGHAI HUAYI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when preparing higher fatty alcohol esters of (meth)acrylates by transesterification, most of the lower esters of raw materials use methyl (meth)acrylates. Because of its low boiling point, the reaction can only be carried out at lower temperatures, which prolongs the reaction time. ; In addition, the copolymerization or homopolymerization of methyl (meth) acrylate and higher fatty alcohol ester of (meth) acrylate will reduce the productive rate of higher fatty alcohol ester of (meth) acrylate, so the addition amount of general inhibitor is higher than In terms of cost and post-processing, this method is not suitable
At present, there are almost no patent reports on the synthesis of higher fatty alcohol esters of (meth)acrylate in China

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0012] Add higher aliphatic alcohol into the reaction kettle with water separator, add acrylic acid, entrainer cyclohexane, catalyst p-toluenesulfonic acid and polymerization inhibitor copper acetate after melting at 75°C, the mole of acrylic acid / higher aliphatic alcohol The ratio is 1.2:1, the amount of cyclohexane is 30wt% of the total reactants, the amount of p-toluenesulfonic acid is 1.2wt% of the total reactants, and the amount of copper acetate is 0.5wt% of the total reactants. Heating and heating under stirring, the stirring speed was 300r / min, the reaction temperature was 115°C, and the reaction yield results based on alcohol after 6.5 hours of reaction are shown in Table 1.

[0013] Example

Embodiment 6～8

[0015] Taking stearyl alcohol as raw material to synthesize stearyl acrylate, the reaction conditions are the same as in Example 1, and the reaction results of changing the type of polymerization inhibitor are shown in Table 2.

[0016] Example

Embodiment 9～12

[0018] Raw material and reaction condition are the same as embodiment 6, and the reaction result of changing the polymerization inhibitor consumption is shown in Table 3.

[0019] Example

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PUM

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Abstract

The invention provides a (methyl) higher aliphatic acrylate preparation method, at the presence of at least one inhibitor and entrainer, using methacrylic acid and high grade aliphatic alcohols as raw material, synthesizing methacrylic acid high grade aliphatic alcohol ester through direct esterification at the presence of acid catalyst, after the esterification ends, post-treating the reaction product, finally removing excess entrainer and water through vacuum distillation.

Description

technical field [0001] The invention relates to a method for preparing higher fatty alcohol (meth)acrylate, in particular to a method for synthesizing and purifying higher fatty alcohol (meth)acrylate. Background technique [0002] Higher fatty alcohol (meth)acrylate, or long-chain alkyl (meth)acrylate, is an important class of fine chemical products and high-molecular polymer monomers. It contains a hydrophobic long-chain aliphatic hydrocarbon skeleton and has weather resistance , water resistance, low cohesion, flexibility, hardness, and impact resistance, it is widely used in coatings, pour point depressants, plastics, papermaking, leather, and chemicals. Higher fatty alcohol (meth)acrylate, as one of the monomers of polyacrylate emulsion, can improve the water resistance of the emulsion; (meth)acrylic acid higher fatty alcohol ester copolymer (PAHE) or (meth)acrylic acid higher fat The copolymer of alcohol ester and other monomers is an important crude oil point depress...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/54C07C67/08
Inventor 蒋庆智李雪梅张春雷邵敬铭
Owner SHANGHAI HUAYI NEW MATERIAL