A kind of synthetic method of hydroxypropyl acrylate

A technology of hydroxypropyl acrylate and synthesis method, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds. It can solve problems such as patent documents that have not been found, and achieve convenient coating process and remarkable polymerization inhibition effect. , Coating film properties have soft and hard effects

Inactive Publication Date: 2011-12-07
TIANJIN CHEM REAGENT RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] By searching, no patent documents related to the present invention have been found

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of synthetic method of hydroxypropyl acrylate, the steps are as follows:

[0018] (1) Place a 1000ml four-necked flask equipped with a stirrer, a thermometer, a reflux condenser and a constant pressure dropping funnel on a water bath, add 0.012mol of ferric oxide, an appropriate amount of p-hydroxyanisole and 1mol of acrylic acid, and heat the water bath to At 83°C, add 1.1 mol of propylene oxide dropwise with constant pressure dropping funnel within 1.5h under stirring, and continue to react at 83--85°C for 1h after the dropwise addition is completed.

[0019] (2) Then transfer the reactant into a Kjeldahl retort, add an appropriate amount of p-hydroxyanisole for vacuum distillation, and collect the fraction at 78--82°C / 5--6mmHg, which is the finished product of hydroxypropyl acrylate.

Embodiment 2

[0021] A kind of synthetic method of hydroxypropyl acrylate, the steps are as follows:

[0022] (1) Place a 1000ml four-neck flask equipped with a stirrer, a thermometer, a reflux condenser and a constant pressure dropping funnel on a water bath, add 0.010mol of iron oxide, an appropriate amount of p-hydroxyanisole and 1mol of acrylic acid, and heat the water bath to At 85°C, add 1.2mol propylene oxide dropwise with constant pressure dropping funnel within 1.4h under stirring, and continue to react at 83-85°C for 1h after the dropwise addition is completed.

[0023] (2) Then the reactant is transferred into a Kjeldahl retort, and then an appropriate amount of p-hydroxyanisole is added for vacuum distillation, and the fraction collected at 75-79° C. / 4-5 mmHg is the finished product of hydroxypropyl acrylate.

Embodiment 3

[0025] A kind of synthetic method of hydroxypropyl acrylate, the steps are as follows:

[0026] (1) Place a 1000ml four-neck flask equipped with a stirrer, a thermometer, a reflux condenser and a constant pressure dropping funnel on a water bath, add 0.011mol of ferric oxide, an appropriate amount of p-hydroxyanisole and 1mol of acrylic acid, and heat the water bath to At 84°C, add 1 mol of propylene oxide dropwise with constant pressure dropping funnel within 1.5h under stirring, and continue to react at 84-85°C for 1h after the dropwise addition is completed.

[0027] (2) Then the reactant is transferred into a Kjeldahl retort, and then an appropriate amount of p-hydroxyanisole is added for vacuum distillation, and the fraction collected at 80-88° C. / 5-6 mmHg is the finished product of hydroxypropyl acrylate.

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Abstract

The invention relates to a synthesis method of hydroxypropyl acrylate. The steps are: (1) placing a 1000ml four-neck flask on a water bath, adding iron sesquioxide, p-hydroxyanisole and acrylic acid, heating the water bath to 80-85°C, Under stirring, drop a certain amount of propylene oxide with a constant pressure dropping funnel within 1-2 hours, and continue the reaction at 80-85°C for 0.5-1.5 hours after the dropwise addition is completed. (2) Then transfer the reactant into a Kjeldahl retort, add an appropriate amount of p-hydroxyanisole for vacuum distillation, and collect the fraction at 75-90°C/4-6mmHg to be the finished product. The present invention selects the novel high-efficiency polymerization inhibitor p-hydroxyanisole, which is superior to other polymerization inhibitors (such as hydroquinone). The effect is remarkable and the dosage is small, which can fully meet the requirements of use and guarantee the product quality.

Description

technical field [0001] The invention belongs to the field of fine chemicals, in particular to a method for synthesizing hydroxypropyl acrylate. Background technique [0002] Hydroxypropyl acrylate, as a difunctional monomer, has an important application in the synthesis of acrylic resin coatings with excellent performance. It can be copolymerized with other vinyl monomers to produce acrylic resin with -OH side chain, and it can be used as thermosetting acrylic paint when combined with melamine formaldehyde resin, which is an important type of acrylic series paint. This -OH-bearing resin can also be used as the hydroxyl component of polyurethane coatings. [0003] By searching, no patent documents related to the present invention have been found yet. Contents of the invention [0004] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a light color, gloss retention, color retention, good weather resistance, stable to acid, wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/54C07C67/26
Inventor 周琦
Owner TIANJIN CHEM REAGENT RES INST
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