OPCOLIG

LIGNOSULPHONIC ACID COMPOUNDS AND PARTIALLY OR SUBSTANTIALLY DESULPHONATED DERIVATIVES OR MODIFICATIONS OF THE SAME, INCLUDING COMPOSITIONS OF MATTER CONTAINING A SUBSTANTIAL PROPORTION OF THE ABOVE MATERIALS FOR USE IN THE FIELDS OF DISPERSANTS, EMULSIFIERS, DEFLOCCULANTS, FLOTATION AGENTS, EXTENDERS, GRINDING AIDS, DRILLING MUDS AND ADHESIVES