Additive, useful as dispersing agent and inerting agent of clays, for aqueous suspensions of calcium sulfate hemihydrate containing clay and for the manufacture of natural gypsum board, comprises an anionic and cationic comb polymer

摘要

Additive (A) comprises an anionic and cationic comb polymer. An independent claim is included for the aqueous suspension of calcium sulfate hemihydrate containing clays, comprising the additive.