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Preparation method of sulfonated phenolic water-absorbing resin

A technology of water-absorbent resin and sulfonated phenolic resin, which is applied in the field of synthetic polymer water-absorbent resin, can solve problems such as insufficient high-temperature resistance, and achieve good viscoelasticity, compressive strength, and good thermal stability

Inactive Publication Date: 2011-12-28
CHINA PETROCHEMICAL CORP +1
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of existing water-absorbent resins with insufficient high-temperature resistance, and to provide a preparation method for sulfonated phenolic water-absorbent resins to meet the needs of high-temperature resistant water-absorbent resins

Method used

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  • Preparation method of sulfonated phenolic water-absorbing resin

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Embodiment Construction

[0006] Add formaldehyde into the reactor equipped with reflux condenser, thermometer and stirrer, then add molten phenol, after stirring evenly, add sulfonating agent, after it is completely dissolved, add catalyst and appropriate amount of water, the reaction temperature is controlled at 50 -60°C, after stirring for 0.5h, the temperature was raised to 100°C, after 1h of reaction, toughening modifier was added, and the reaction was continued for 1-2h. Viscoelastic water-absorbent resin.

[0007] See the following list for specific implementation methods:

[0008]

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Abstract

The invention relates to a method for preparing a sulfonated phenolic water-absorbing resin, and belongs to the technical field of methods for preparing high molecular water-absorbing resins. The method comprises the following steps of: adding formaldehyde into a reactor in which a reflux condenser, a thermometer and a stirrer are arranged; adding molten phenol; uniformly stirring and then addinga sulfonating agent; adding a catalyst after the sulfonating agent is fully dissolved; controlling pH value of reaction to be 8-10 and reaction temperature to be 50-60 DEG C; reacting for a time withstirring; then raising the temperature to 90-110 DEG C; continuously reacting for a certain time and then adding a toughening and modifying agent; continuously reacting; and pouring reaction liquid into a closed container for slaking before gelling to prepare the sulfonated phenolic water-absorbing resin. A product provided by the invention has higher viscoelasticity and compressive strength, water absorption multiple of 5-20, capability of resisting high temperature of 150-180 DEG C and high thermal stability, can be used for leakage stoppage operation of deep wells and ultra-deep wells in apetroleum drilling process and can also be used for other fields with higher requirements on the temperature resistance of the water-absorbing resin.

Description

technical field [0001] The invention relates to a preparation method of sulfonated phenolic water-absorbing resin, which belongs to the technical field of preparation methods of synthetic polymer water-absorbing resin. Background technique [0002] Water-absorbent resin is a functional polymer material containing hydrophilic groups and cross-linked structures. It has the function of absorbing water several times to thousands of times heavier than itself, and has excellent water retention performance. It is also difficult to separate the water under pressure. The research on water-absorbent resins began in the 1960s with the US Department of Agriculture's research on soil improvement and agricultural water retention, and then developed rapidly, and gradually developed starch-modified, cellulose-modified and synthetic polymers such as acrylates. These three types of water-absorbing resins are widely used in medical and health care, food packaging, soil improvement, desert con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/14C08G8/28C08G8/10C08L29/14C08L9/02C08L33/26C08L33/02C08L75/04
Inventor 赖小林王中华姜雪清刘文堂李旭东
Owner CHINA PETROCHEMICAL CORP
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