EP 0515426 B1 19940831 - Method of preparing salts of sulphonated phosphoric acid esters and their use as leather-oiling agents.
Title (en)
Method of preparing salts of sulphonated phosphoric acid esters and their use as leather-oiling agents.
Title (de)
Verfahren zur Herstellung von Salzen sulfonierter Phosphorsäureester und ihre Verwendung als Lederfettungsmittel.
Title (fr)
Procédé de fabrication de sels d'esters phosphoriques sulfonés et leur utilisation comme graisses pour cuirs.
Publication
Application
Priority
- DE 4004293 A 19900213
- EP 9100206 W 19910204
Abstract (en)
[origin: DE4004293A1] The invention concerns leather-oiling agents, a process for producing leathers with good water-resistance characteristics and the use of sulphonated phosphoric acid ester salts for producing leathers with good water-resistance characteristics.
[origin: DE4004293A1] A dubbing agent for leather contains alkali, amine and/or NH4 salts of sulphonated phosphoric acid esters, obtd. by reacting phosphoric acid esters of formula I with sulphonating agents, followed by hydrolysis with alkali hydroxides, NH4OH and/or amines. R1 = 8-22C alkyl or alkenyl; R2, R3 = H or 8-22C alkyl or alkenyl; m, n, p = 2-4; x, y, z = 0-30. Pref. R1 = 12-18C alkyl or alkenyl; R2, R3 = H or 12-18C alkyl or alkenyl; m, n, p = 2; x, y, z = 0-10. Leather, tanned, post-tanned or dyed, is dubbed with the esters, the dubbing bath is brought to pH 3.5-4.1 with acid, and the ester salts are fixed on and in the leather by addn. of Cr and/or Al tanning agents. The salts, pref. alkali salts, of the esters are used, opt. with other dubbing agents, in amt. of 1-20 (2-14) wt.%, w.r.t. pared leather, and the bath is brought to pH 3.8-4.0 with formic, acetic and/or sulphuric acid.
IPC 1-7
IPC 8 full level
C14C 9/02 (2006.01)
CPC (source: EP)
C14C 9/02 (2013.01)
Designated contracting state (EPC)
AT CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
WO 9112344 A2 19910822; WO 9112344 A3 19911003; AT E110792 T1 19940915; BR 9106036 A 19930202; DE 4004293 A1 19910814; DE 59102749 D1 19941006; EP 0515426 A1 19921202; EP 0515426 B1 19940831; ES 2060363 T3 19941116; JP H05504161 A 19930701
DOCDB simple family (application)
EP 9100206 W 19910204; AT 91903401 T 19910204; BR 9106036 A 19910204; DE 4004293 A 19900213; DE 59102749 T 19910204; EP 91903401 A 19910204; ES 91903401 T 19910204; JP 50370291 A 19910204