Additives for the paints and inks industries: some new developments

Most aqueous dispersing agents are single chemical compounds, chosen for their deflocculating efficiency. Dispere‐Ayd W‐22 and W‐28, from Daniel Products Co, New Jersey, USA, are multi‐functional blends of anionic and non‐ionic surfactants which are claimed to deflocculate effectively a wide range of organic and inorganic pigments, and also provide: optimum gloss, flow at high pigment concentrations, water resistance, and also optimum viscosity stability on aging, it is claimed. Surface tack and foaming tendency are reduced to a minimum.