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Preparation method of hydroxypropyl acrylate

A technology of hydroxypropyl acrylate and acrylic acid, which is applied in the field of preparation of hydroxypropyl acrylate, can solve the problems of undiscovered patent documents, complex preparation process, color difference, etc., and achieve the effect of convenient coating process, wide application and light color

Inactive Publication Date: 2010-11-24
TIANJIN CHEM REAGENT RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing preparation process is relatively complicated and the color is poor
[0004] 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

[0021] A preparation method of hydroxypropyl acrylate, the specific operation steps are as follows.

[0022] Raw material ratio:

[0023] Acrylic acid 1mol

[0024] Propylene oxide 1.1mol

[0025] Iron trioxide 0.012mol

[0026] Proper amount of hydroquinone

[0027] Steps:

[0028] Put 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 0.012mol of iron oxide, an appropriate amount of hydroquinone and 1mol of acrylic acid, heat the water bath to 83°C, and With stirring, 1.1 mol propylene oxide was added dropwise with a constant pressure dropping funnel within 1.5 hours, and the reaction was continued for 1 hour at 83--85°C after the dropwise addition was completed. Then transfer the reactant into a Kjeldahl distillation flask, add appropriate amount of hydroquinone for vacuum distillation, and collect the fraction at 78--82°C / 5--6mmHg, which is the finished product of hydroxyprop...

Embodiment 2

[0030] A preparation method of hydroxypropyl acrylate, the specific operation steps are as follows.

[0031] Raw material ratio:

[0032] Acrylic acid 1mol

[0033] Propylene oxide 1.2mol

[0034] Iron trioxide 0.010mol

[0035] Proper amount of hydroquinone

[0036] Steps:

[0037] Put 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 0.010mol of iron oxide, an appropriate amount of hydroquinone and 1mol of acrylic acid, heat the water bath to 85°C, and With stirring, 1.2 mol of propylene oxide was added dropwise with a constant pressure dropping funnel within 1.4 hours, and the reaction was continued for 1 hour at 83--85°C after the dropwise addition was completed. Then transfer the reactants into a Kjeldahl distillation flask, add an appropriate amount of hydroquinone for vacuum distillation, and collect the fraction at 75--79°C / 4--5mmHg, which is the finished product of hy...

Embodiment 3

[0039] A preparation method of hydroxypropyl acrylate, the specific operation steps are as follows.

[0040] Raw material ratio:

[0041] Acrylic acid 1mol

[0042] Propylene oxide 1mol

[0043] Iron trioxide 0.011mol

[0044] Proper amount of hydroquinone

[0045] Steps:

[0046] Put 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 0.011mol of iron oxide, an appropriate amount of hydroquinone and 1mol of acrylic acid, heat the water bath to 84°C, and Under stirring, drop 1 mol of propylene oxide in 1.5 hours with a constant pressure dropping funnel, and continue to react for 1 hour at 84--85°C after the dropwise addition is completed. Then transfer the reactant into a Kjeldahl distillation flask, add appropriate amount of hydroquinone for vacuum distillation, and collect the fraction at 80--88°C / 5--6mmHg, which is the finished product of hydroxypropyl acrylate.

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PUM

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Abstract

Te invention relates to a preparation method of hydroxypropyl acrylate, which comprises the following steps of: preparing a crude product through the reaction of acrylic acid and propylene oxide under the action of iron trioxide as a catalyst and hydroquinone as a polymerization inhibitor, and then obtaining the finished product of the hydroxypropyl acrylate through reduced-pressure distillation. Because the hydroxypropyl acrylate prepared by the method is provided with double bonds and hydroxyl groups, the hydroxypropyl acrylate belongs to a difunctional monomer and can be widely used as a crosslinked monomer in coatings and adhesives; and an acrylic resin coating used as a film forming substance has the characteristics of light color, gloss retention, color retention, good weather resisting property, stability for acid, water and alcohol, convenient coating process, soft and hard performance of a coated film, durability and the like.

Description

technical field [0001] The invention belongs to the field of fine chemicals, in particular to a preparation method of hydroxypropyl acrylate. Background technique [0002] As a difunctional monomer, hydroxypropyl acrylate plays an important role in the synthesis of acrylic resin coatings with excellent performance. It can be copolymerized with other vinyl monomers to produce acrylic resins with -OH side chains, which can be combined with melamine formaldehyde resins. It can be used as a thermosetting acrylic paint, which is an important type of acrylic series paint. This kind of resin with -OH can also be used as a hydroxyl component of polyurethane paint. [0003] Hydroxypropyl acrylate has a wide range of applications, such as for the preparation of thermosetting acrylic coatings, styrene-butadiene rubber emulsion modifiers, acrylic modified polyurethane coatings, water-soluble electroplating coating binders, fiber finishing agents, paper coatings, photosensitive coatings ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/54C07C67/26C07C67/24
Inventor 周琦
Owner TIANJIN CHEM REAGENT RES INST
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