Ciba-geigy Corporation

Gustaaf Scherer

Hans-Ulrich Berendt

Alain Lauton

Hans Mollet

Roland Haberli

Roland Putzar

Stable dust-free commercial preparations of organic substances are described, which preparations comprise an organic substance especially a dyestuff or optical brightener in dry powder form enclosed in a covering, particularly in a sack or bag sealed on all sides, made from polyethylene oxide having a molecular weight of more than 200,000 and a thickness of 10 to 80.mu., which covering is soluble in the same medium as the content.

Commercial preparations of dry organic substances

Sulphonated condensation products which are obtained, irrespective of sequence, by reaction of an aromatic compound that contains at least two replaceable hydrogen atoms in the nucleus with a compound of the formula ##STR1## wherein X represents the direct bond or oxygen, Hal represents chlorine or bromine, and n is a number from 1 to 4, and sulphonation, and optionally by further condensation with formaldehyde or formaldehyde donors. The sulphonated condensation products are particularly effective as levelling agents and dispersants.

Growing community of inventors

Basel, Switzerland

Gustaaf Scherer