EP 3775136 A1 20210217 - IMPROVED BLEACHING COMPOSITIONS
Title (en)
IMPROVED BLEACHING COMPOSITIONS
Title (de)
VERBESSERTE BLEICHMITTELZUSAMMENSETZUNGEN
Title (fr)
COMPOSITIONS DE BLANCHIMENT AMÉLIORÉES
Publication
Application
Priority
- GB 201804916 A 20180327
- GB 2019050878 W 20190327
Abstract (en)
[origin: GB2572364A] Bleaching composition comprising an enediol, an oxidizing agent and a catalyst, the composition may further comprise an accelerator and/or an electrolyte. The enediol may be an ascorbic acid, a derivative thereof an enediol formed from rearrangement of a reducing sugar or derivate thereof. Preferably the enediol is ascorbic acid or a derivative thereof. The oxidizing agent may comprise a chlorine or an oxygen based agent. Preferably the oxygen based agent comprising peracetic acid, tertiary butyl hydroperoxide, hydrogen peroxide or an agent that releases such. The catalyst is chosen from a transition metal or an oxide or salt thereof. Preferably the metal being cobalt, iron, manganese, silver, titanium, vanadium, zinc or most preferably copper. The salts preferably being a halide or sulphate. The accelerator may comprise one or more of, alcohol groups, ether groups or cyano groups. Preferably at least one alcohol and at least one ether group, more preferably the accelerator is a glycol ether. Most preferably glucose, hexylene glycol or fructose. The electrolyte may be a halide salt of an alkali or alkaline earth metal, preferable a chloride or iodide salt, most preferably sodium or magnesium chloride or potassium iodide.
IPC 8 full level
CPC (source: EP GB)
C11D 3/3905 (2013.01 - EP); C11D 3/391 (2013.01 - EP); C11D 3/3932 (2013.01 - GB); C11D 3/3951 (2013.01 - GB); C11D 3/3956 (2013.01 - GB); C11D 3/48 (2013.01 - EP)
Citation (search report)
See references of WO 2019186159A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
GB 201804916 D0 20180509; GB 2572364 A 20191002; GB 2572364 B 20230412; EP 3775136 A1 20210217; WO 2019186159 A1 20191003
DOCDB simple family (application)
GB 201804916 A 20180327; EP 19721669 A 20190327; GB 2019050878 W 20190327