Method for synthesizing solid polyacrylic-series water reducing agents by aid of microwaves at one step
The invention provides a method for synthesizing solid polyacrylic-series water reducing agents by the aid of microwaves at one step. The method includes adding unsaturated polyoxyethylene ether into a reactor with a stirring device; melting the unsaturated polyoxyethylene ether under microwave cond...
Saved in:
Main Authors | , , , |
---|---|
Format | Patent |
Language | English |
Published |
24.06.2015
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The invention provides a method for synthesizing solid polyacrylic-series water reducing agents by the aid of microwaves at one step. The method includes adding unsaturated polyoxyethylene ether into a reactor with a stirring device; melting the unsaturated polyoxyethylene ether under microwave conditions, then sequentially adding chain transfer agents, unsaturated carboxylic acid and initiators into the reactor; stirring the unsaturated polyoxyethylene ether, the chain transfer agents, the unsaturated carboxylic acid and the initiators at the temperatures of 20-70 DEG C for 10-30min, and then stopping the polyoxyethylene ether, the chain transfer agents, the unsaturated carboxylic acid and the initiators from reacting with one another; cooling reaction products of the polyoxyethylene ether, the chain transfer agents, the unsaturated carboxylic acid and the initiators until the temperatures of the reaction products reach the room temperature so as to obtain the solid polyacrylic-series water reducing agents. The method has the advantages that microwave equipment with a stirring function is utilized in procedures for preparing the solid polyacrylic-series water reducing agents, so that various materials which participate in reaction can be uniformly mixed with one another without water or other organic solvents, and can completely react with one another, and the solid polyacrylic-series water reducing agents with excellent performance and the content nearly equal to 100% can be obtained under the conditions of specific microwave reaction frequencies, reaction power and reaction time. |
---|---|
Bibliography: | Application Number: CN20151162819 |