A retention agent is a process chemical that improves the retention of a functional chemical in a substrate. The result is that totally less chemicals are used to get the same effect of the functional chemical and less chemicals goes to waste.
Retention agents (retention aids) are used in the papermaking industry. These are added in the wet end of the paper machine to improve retention of sizing, fine particles and fillers during the formation of paper. Typical chemicals used as retention aids are: polyacrylamide (PAM), polyethyleneimine (PEI) or bentonite.
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