Process for synthesizing high performance water reducing agent of polyocarboxy acid
A synthesis process and high-performance technology, applied in the field of polycarboxylate high-performance water reducer synthesis process, can solve the problems of cumbersome process control and complicated process, and achieve the effect of simple process flow, simple process and simple operation
Inactive Publication Date: 2009-01-07
宫世全
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However, the process is generally more complicated, and the process control is cumbersome.
Method used
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[0021] The formula of the present invention is as follows: parts by weight
[0022]
[0023] Technology of the present invention is as follows:
[0024] 1. Weigh various raw materials according to the formula;
[0025] 2. Pour water into the reactor;
[0026] 3. Add polyethylene glycol, butyl methacrylate, methyl methacrylate, ether-based polyoxyethylene, maleic anhydride and alkali in sequence, melt, stir and mix in the reaction kettle;
[0027] 4. Raise the temperature to 70-100°C. When the liquid in the kettle appears a yellow-brown viscous liquid, it indicates that the reaction is complete and complete. This means that the pH value should be 7-8, which is generally weakly alkaline.
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A synthesis process for a polycarboxylate high performance water reducing agent is characterized in that the polycarboxylate high performance water reducing agent is made from the raw materials with the following weight portions of 1 to 4 portions of polyethylene glycol, 2 to 3 portions of butyl methacrylate, 3 to 5 portions of methyl methacrylate, 23 to 25 portions of vinyl ether polyoxyethylene and 4 to 5 portions of maleic anhydride. Water is heated to 70 DEG C to 100 DEG C in a reaction kettle, part of the reactants is taken to pour into the reaction kettle to stir, melt, mix evenly and heat, alkali with 0.5 weight portions is added to neutralize after the reaction is completed, and the process is completed. The synthesis process has no nitrogen protection and does not use de-ionized water equipment, does not need separate titration, and can simultaneously carry out the addition and the mixture. The process has the characteristics of simple flow, simple and convenient operation, excellent performance-price ratio, safety, environment protection, etc.
Description
technical field [0001] The invention relates to the chemical industry field of building material concrete additives, and relates to a synthesis process of polycarboxylic acid high-performance water reducer. Background technique [0002] Polycarboxylate high-efficiency water-reducing agent is the third generation of water-reducing agent, famous for its environmental protection and high water-reducing rate, and it is more and more widely used at present, not only for C40-C100 high-strength concrete, but also for C10- C30 low-grade concrete, its economic performance is superior to that of naphthalene-based superplasticizers, and the performance of concrete mixed with polycarboxylate superplasticizers is better than that of concrete mixed with naphthalene-based superplasticizers (fresh concrete workability, after hardening Compared with the concrete mixed with naphthalene-based superplasticizer, the strength and durability of concrete have a qualitative leap). [0003] The new ...
Claims
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Login to View More IPC IPC(8): C08F290/06C04B24/26C04B103/30
Inventor 宫振鑫
Owner 宫世全
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