Polycarboxylate superplasticizer has excellent performance such as high water-reducing rate, small slump loss and no pollution. It is an important component of high-strength and high-flow concrete and high-volume fly ash concrete.
In recent years, PC has gradually replaced naphthalene-based water reducers in developed countries. It is reported that PCs in Japan after 1995。The amount of use has exceeded that of naphthalene-based water reducing agent. By 1998, Japanese polycarboxylic acid products accounted for more than 60% of all high-performance air-entraining water reducing agent products. By 2001, polycarboxylic acid-based water reducing agent Market share exceeds 80% 。
Since the development of concrete technology is very uneven in China, performance and cost issues have affected the application and development of PC in China. Therefore, it is a research hotspot to adopt a new synthetic process to prepare high-performance and low-cost PC. However, the premise of preparing a high-performance polycarboxylic acid-based water reducing agent is to prepare a polyethylene glycol monomethyl ether methacrylate intermediate having excellent properties.