Question 1

What is the typical 3-MPA dosage in PCE synthesis?

Accepted Answer

The standard dosage is 0.5%–2.0% by weight relative to total monomer mass. Lower dosages yield higher molecular weight PCE for high water-reduction; higher dosages produce lower MW PCE for slump retention.

Question 2

What is the minimum order quantity for 3-MPA?

Accepted Answer

Sample orders start from 250 kg (one drum). Standard commercial orders start from 1 MT.

Question 3

How does 3-MPA differ from dodecyl mercaptan as a chain transfer agent?

Accepted Answer

3-MPA is water-miscible and suitable for aqueous PCE polymerization. Its carboxylic acid group also provides additional anchoring sites in the PCE backbone. Dodecyl mercaptan is oil-soluble and not suited for aqueous systems.