What are the functional monomers that make polycarboxylate superplasticizers have ultra-sustained release effects?

Slow-release monomers, functional monomers, reactive monomers.

1. Sustained-release monomers: Sustained-release monomers commonly used in polycarboxylate water-reducing agents include acid sustained-release monomers and ester sustained-release monomers. Acid sustained-release monomers are monomers with longer carboxylic acid groups, such as polyvinyl alcohol monomers, polyvinyl alkyd monomers, etc.

2. Functional monomer: In order to make the polycarboxylate water-reducing agent have a super-sustained release effect, functional monomers are often introduced during the polymerization reaction. It can be cross-linked with the polycarboxylic acid main chain or form coordination bonds with the main chain to achieve a sustained release effect.

3. Reactive monomers: In order to achieve ultra-sustained release, reactive monomers can also be introduced. During the polymerization process, it reacts with the polycarboxylic acid main chain to form a cross-linked structure or introduce a sustained-release functional group to achieve a super sustained-release effect.