Abstract Compositions useful in the aqueous cold-bleaching of textiles comprising (1) from 3 to 100 percent by weight of a bleaching component comprising (a) from 95 to 99.99 percent by weight of a mixture of (i) a percompound yielding H2O2 in aqueous solution and (ii) an activator for active oxygen selected from the group consisting of N-acyl and O-acyl compounds having 2 to 9 carbon atoms in the acyl, said activator having an activating action of at least 3 in the Per-Acid Formation Test, said percompound and said activator being present in such ratio that from 0.01 to 4 mols of said activator are present for each gram-atom of active oxygen in said percompound, and (b) from 0.01 to 5 percent by weight of at least one optical brightener selected from the group consisting of 4,4''-bis-(azolyl)-stilbene-2,2''-disulfonic acids, stilbyl-naphthotriazoles, bis-(benzoxazolyl)-derivatives, 2benzoxazolyl-4,5-naphthothiophene compounds, diphenyl-distyryl compounds and water-soluble acid addition salts thereof, and (2) from 0 to 97 percent of other customary ingredients of bleaching agents or washing agents having a bleaching effect.
The composition of claim 1 containing from 99.98 to 97.5 percent by weight of component (a) mixture and 0.02 to 2.5 percent by weight of component (b) optical brightener.
Claim 2
Dependent Claim
56 words
The composition of claim 2 wherein said activator for active oxygen has an activating action of at least 4.5 in the Per-Acid Formation Test and said percompound and said activator are present in such a ratio thAt from 0.05 to 2 mols of said activator are present for each gram-atom of active oxygen in said percompound.
Claim 3
Dependent Claim
19 words
The composition of claim 3 wherein said percompound yielding H2O2 in aqueous solution is a water - soluble perborate.
Claim 4
Dependent Claim
124 words
The composition of claim 1 having an addition content, based on said total composition, of at least one compound selected (1) from 0 to 5 percent by weight of a corrosion inhibitor selected from the group consisting of triazoles and tetrazoles containing at least one of the groups Nme and NOMe where Me represents a metal or a hydrogen atom replaceable by a metal, (2) from 0 to 20% by weight of water-soluble salts of partial esters of fatty alcohols having 10 to 22 carbon atoms and their ethoxylated and propoxylated compounds having 1 to 10 alkoxyl groups, with orthophosphoric acid, pyrophosphoric acid and polyphosphoric acid, and (3) from 0 to 10 percent by weight of an organic sequestering builder salt for heavy metals.
Claim 5
Dependent Claim
15 words
The composition of claim 5 wherein said water-soluble salts of partial esters has the formula
Claim 6
Dependent Claim
25 words
The composition of claim 1 wherein said activator for active oxyten is a member selected from the group consisting of tetraacetylglycoluril, tetrapropionylglycoluril, methyltriacetylglycoluril and diacetyldibenzoylglycoluril.
Claim 7
Dependent Claim
62 words
A process for the stabilization of optical brighteners against deterioration in aqueous solutions in the presence of copper ions and H2O2 which consists essentially of the steps of adding to an aqueous solution containing (1) small amounts of copper ions, (2) an effective amount for optical brightening for textiles of an optical brightener having a formula selected from the group consisting of