Patent ID: 8668773

Claim:
A dry powder cementitious tile adhesive composition (“CTA”) ready to be mixed with water, said dry powder CTA comprising at least one powdery binder that comprises a mineral binder that includes cement, and at least one aggregate, wherein: the cement of the mineral binder comprises standard Portland cement, and the mineral binder optionally further including slaked lime, gypsum plaster or mixtures thereof; the dry powder CTA contains a fluid additive present in a maximum amount of 40 g per kg by weight of the dry powder CTA; and the fluid additive is hydrophobic and comprises mineral oil, paraffin oil, paraffin, polyolefin or mixtures thereof; whereby the fluid additive reduces fine particles of the dry powder CTA susceptible to producing emission of dust according to French standard NF P 94-103 but modified so that the negative pressure of section 6.2 thereof is 2.59 hPa instead of 5.52 hPa and the suction drain is 3 minutes instead of 4 minutes, and whereby the dry powder CTA has reduced emission of dust during manufacture, manipulation and use, and wherein when the dry powder CTA is admixed with water, a CTA results that has adhesion as a CTA as determined in conformity with standard NF EN 1348.