Polycarring acid water reduction agent HEDP is a commonly used concrete exterior agent to improve the working performance and durability of concrete. The following is the process of common polycarboxylic acid water reduction agent:
Raw material preparation: Collect the required raw materials, including polycarboxylic acid monomers, causes, diluents, etc.
Single synthesis: The polycarboxylic acid monomer is mixed with a certain percentage in a certain proportion to the reaction kettle for a polymerization reaction. The reaction conditions such as temperature and time must be well controlled.
Neutral treatment: The polycarboxylic acid water reducing agent is neutral to adjust its pH value and ion concentration. Neutralized treatment can use alkaline solutions, such as sodium hydroxide solution.
Filtering and concentration: Filter the neutralized polycarboxylic acid water reduction agent to remove impurities, and then condense it to the required concentration by distillation or concentration.
Quality inspection: Quality testing of polycarboxylic acid reduction agents in production, including testing of indicators such as appearance, pH value, solid content, and water reduction rate.
Packaging and storage: Packing the qualified polycarboxylic acid water reduction agent, common packaging forms include barrels and bags. To store the packaged products, the sunlight and high temperature environment should be avoided.
It should be noted that the production process of polycarboxylic acid water reduction may vary due to the different manufacturers and product types. The above processes are only general references. The specific process process should be determined according to the actual situation and related standards or specifications.