Rhone-poulenc Industries

Rhone-progil

Jean-Claude Vitat

Jean-Pierre Remond

Jean-Robert Thebault

Pierre Sarafinof

Jean-Claude Cosnard

Process for anti-redeposition of staining substances on textiles of natural, synthetic or artificial fibers or mixtures thereof in the course of operations of dry cleaning or de-oiling by means of suitably stabilized perchloroethylene comprising incorporating into the perchloroethylene a sufficient amount of at least one nitroalkane containing from 1 to 4 atoms, as an anti-redeposition additive.

Process for dry-cleaning or de-oiling by means of a perchloroethylene

A composition for drying surfaces comprising 90 to 99.95% by weight of an organic solvent at least 50% of which is 1,1,2-trichloro-1,2,2-trifluoroethane, 0.04 to 8% by weight of a hydrophobic substantially water insoluble surface active agent and 0.01 to 2% by weight of an organic acid.

Drying compositions

A homogeneous liquid composition for use in the treatment of surfaces to remove water and other materials in which the composition is formulated of 90 to 99.95% by weight of a solvent, at least 50% by weight of which is trichloro-1,1,2-trifluoro-1,2,2-ethane and 0.05% to 10% by weight of one or more diamides having the general formula ##EQU1## in which R is a saturated or unsaturated aliphatic hydrocarbon having 1 to 25 carbon atoms, R.sup.1 is an aliphatic hydrocarbon group having 10 to 30 carbon atoms and at least one ethylenic double bond, and n is a number from 1 to 9.

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Antony, France

Jean-Claude Vitat