Sulpho group-containing aromatic compounds, their production and use as dispersants or levelling agents in dyeing textiles or tanning leather
AssigneeSandoz Ltd.
InventorHans-Peter Baumann
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Abstract
Compounds and mixtures of compounds obtainable by condensation of sulphonation products of defined alkyl-substituted naphthalenes and sulphonation products of optionally alkyl-substituted diphenylethers with formaldehye and optionally treated with further components, are valuable interface-active compounds suitable as assistants in various application fields, in particular as dispersing or levelling agents in the dyeing with disperse dyes or as tanning-assistants or dyeing-assistants for leather.
Claims37
A methylene bridge and sulpho group-containing aromatic compound (e) or mixture of compounds (e) obtainable by condensation of
- (a) a sulphonation product of a compound of formula ##STR14## wherein R.sub.1 signifies C.sub.1-4 -alkyl and
- R.sub.2 signifies hydrogen or C.sub.1-4 -alkyl
- and the sum of the number of carbon atoms in R.sub.1 and R.sub.2 together amounts to a least 2 or a mixture thereof, and
- (b) a sulphonation product of a compound of formula ##STR15## wherein each of R.sub.3 and R.sub.4 independently signifies C.sub.1-4 -alkyl and
- each of p and q independently signifies 0,1 or 2
- or a mixture thereof with
- (c) formaldehyde or a formaldehyde-yielding compound in an acidic medium,
- and optionally salt formation.
A composition according to claim 34 wherein the transition metal is selected from Mn.sup.++, Co.sup.+', Ni.sup.++, cu.sup.+' and mixtures thereof.
A process for producing a methylene bridge and sulpho group-containing aromatic compound (e) or mixture of compounds (e) which comprises condensing
- (a) a sulphonation product of a compound of formula ##STR18## wherein R.sub.1 signifies C.sub.1-4 -alkyl and
- R.sub.2 signifies hydrogen or C.sub.1-4 -alkyl
- and the sum of the number of carbon atoms in R.sub.1 and R.sub.2 together amounts to a least 2 or a mixture thereof
- and
- (b) a sulphonation product of a compound of formula ##STR19## wherein each of R.sub.3 and R.sub.4 independently signifies C.sub.1-4 -alkyl and
- each p and q independently signifies 0,1 or 2
- or a mixture thereof with
- (c) formaldehyde or a formaldehyde-yielding compound in an acidic medium and optionally forming a salt.
Dependencies are inferred from the claim text.