POLYCARBOXYLIC ACID WATER-REDUCING AGENT WITH HIGH ADAPTABILITY TO TEMPERATURE AND PREPARATION METHOD THEREFOR

摘要

Provided are a polycarboxylic acid water-reducing agent with high adaptability to temperature and a preparation method therefor. The polycarboxylic acid water-reducing agent is prepared by introducing an unsaturated macromonomer D having a temperature-sensitive side chain in the synthetic process of the polycarboxylic acid water-reducing agent, and binding to a polycarboxylic acid main chain by means of free radical polymerization due to an unsaturated double bond, and on the other hand, the polycarboxylic acid water-reducing agent contains the temperature-sensitive side chain. The density of adsorption groups of the prepared polycarboxylic acid water-reducing agent can be automatically adjusted with the change in ambient temperature, and accordingly, the polycarboxylic acid water-reducing agent has approximate dispersion and dispersion retention capacities in different ambient temperatures, and has high adaptability to different ambient temperatures, and can be used in a large temperature range with the amount of admixture unchanged, facilitating further promotion and application of the polycarboxylic acid water-reducing agent in different climatic regions.