EP 0690135 B1 19991117 - Hydrogen sulfite blocked polyisocyanates as tanning agents
Title (en)
Hydrogen sulfite blocked polyisocyanates as tanning agents
Title (de)
Bisulfit-blockierte Polyisocyanate als Gerbstoffe
Title (fr)
Polyisocyanates bloqués par du bisulfite en tant qu'agents de tannage
Publication
Application
Priority
DE 4422569 A 19940628
Abstract (en)
[origin: EP0690135A1] A reaction prod., contg. carbamoylsulphonate gps., from (A) an organic polyisocyanate, (B) a polyether alcohol with 40-100 mols.% of polyethylene oxide units in a sequence length of 5-70, in amt. of 0.01-0.4 equivs. (as OH gps.) w.r.t. 1 NCO gp., opt. (C) other components reactive with NCO gps., and (D) NH4 or alkali (bi)sulphites, is used as a tanning agent.
IPC 1-7
IPC 8 full level
C08G 18/30 (2006.01); C08G 18/80 (2006.01); C14C 3/18 (2006.01)
CPC (source: EP US)
C14C 3/18 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE ES FR GB IT LI NL
DOCDB simple family (publication)
EP 0690135 A1 19960103; EP 0690135 B1 19991117; BR 9502950 A 19960312; CA 2152539 A1 19951229; DE 4422569 A1 19960104; DE 59507234 D1 19991223; ES 2140581 T3 20000301; JP H08199200 A 19960806; US 5618317 A 19970408
DOCDB simple family (application)
EP 95109198 A 19950614; BR 9502950 A 19950627; CA 2152539 A 19950623; DE 4422569 A 19940628; DE 59507234 T 19950614; ES 95109198 T 19950614; JP 17959495 A 19950623; US 45697295 A 19950601