Preparation method of enhanced polycarboxylate superplasticizer

Abstract

The invention discloses a preparation method of an enhanced polycarboxylate superplasticizer. Compared with a conventional solution polymerization method, the preparation method has the advantages ofhigh reaction speed, no need of heating, narrow molecular weight distribution and lower cost as well as simplicity and convenience in operation, easiness in industrial production and broad applicationprospect. A photoinitiator is adopted as a main substance, so that the reaction speed is improved, and high polymerization speed and high conversion rate of a product are realized; the prepared polycarboxylate superplasticizer has stable performance; a molecular structure of the prepared polycarboxylate superplasticizer is a comb type structure; a main chain contains a polar group, and a side chain contains a nitrogen-containing group; the enhanced polycarboxylate superplasticizer has good dispersity in concrete, and further early strength and late strength of the concrete are remarkably improved; the enhanced polycarboxylate superplasticizer has the characteristics of excellent working performance, good durability, low bleeding rate and good economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of building admixtures, and in particular relates to a preparation method of an enhanced polycarboxylate water reducer. Background technique [0002] With the development of concrete in the direction of high performance and multifunctionality, concrete is required to have high workability, high strength, high durability, and can meet the application in many special cases. Superplasticizers with hyperdispersive properties have become one of the indispensable components in high performance concrete. [0003] In recent years, with the country's increasing emphasis on energy saving and emission reduction and the rapid promotion of the concept of low-carbon economy, scientific and technological workers are striving to improve the performance of concrete water reducing agents and also pay attention to how to reduce their energy consumption. In particular, enterprises are trying to find products with low energy co...

AI Technical Summary

Problems solved by technology

[0004] On the one hand, the current production process of polycarboxylate superplasticizers mostly adopts heating methods, such as steam heating, heat conduction oil heating, etc., which will cause environmental pollution

[0005] On the other hand, the current production process of polycarboxylate superplasticizers is relatively long, generally takes about 4 to 5 hours, and the production efficiency is slow, so it needs to be stocked in advance, and a certain amount of inventory needs to be occupied, resulting in waste of resources and large investment in fixed assets.