초록 ▼

A bleach auxiliary for use as a peroxygen bleach catalyst comprising a water-soluble complex of iron and a multi-dentate ligand-forming chelating agent having defined bleach catalytic activity and hydrolytic and oxidative stability. The chelating agent is preferably a hydroxycarboxylic acid having t

A bleach auxiliary for use as a peroxygen bleach catalyst comprising a water-soluble complex of iron and a multi-dentate ligand-forming chelating agent having defined bleach catalytic activity and hydrolytic and oxidative stability. The chelating agent is preferably a hydroxycarboxylic acid having the general formula I R[CnH2n-m(OH)m]CO2H I wherein R is CH2OH, CHO or CO2H, n is from 4 to 8 and m is from 3 to n, or a salt, lactone, ether, acid ester or boric ester thereof. Bleach and laundry compositions containing the complex are also disclosed.

대표청구항 ▼

A bleach auxiliary for use in aqueous medium as a peroxygen bleach catalyst, the bleach auxiliary comprising a water-soluble complex of iron and a multi-dentate ligand-forming chelating agent, wherein, at pH 10, the complex has a bleach catalytic activity as determined in the catalytic activity test

A bleach auxiliary for use in aqueous medium as a peroxygen bleach catalyst, the bleach auxiliary comprising a water-soluble complex of iron and a multi-dentate ligand-forming chelating agent, wherein, at pH 10, the complex has a bleach catalytic activity as determined in the catalytic activity test described herein of at least 10% and the stability of the complex against hydrolytic and oxidative degradation to water-insoluble iron species as determined in the complex stability test described herein is at least 75%, said complex being incorporated in a water-soluble or water-dispersible organic carrier having a melting point greater than about 30°C. and/or in a water-soluble or water-dispersible agglomerated matrix of solid inorganic diluent, said bleach auxiliary containing by weight from 0 to 20% water. A bleach composition in granular form or in water-releasable combination with a water-insoluble dispensing carrier, said composition comprising a mixture of bleach auxiliary and peroxygen bleaching agent wherein the bleach auxiliary comprises a water-soluble complex of iron and a multi-dentate ligand-forming chelating agent, wherein, at pH 10, the complex has a bleach catalytic activity as determined in the catalytic activity test described herein of at least 10% and the stability of the complex against hydrolytic and oxidative degradation to water-soluble iron species as determined in the complex stability test described herein is at least 75% and wherein the mole ratio of peroxygen bleaching agent to iron complex is in the range from about 2000:1 to about 10:1, said bleach auxiliary containing by weight from 0 to 20% water. A laundry composition in granular form or in water-releasable combination with a water-insoluble dispensing carrier, said composition comprising: (a) at least about 5% by weight of laundry matrix materials comprising one or more of (i) up to about 75% by weight of organic surfactant selected from the group consisting of anionic, nonionic, cationic, amphoteric and zwitterionic surfactants and mixtures thereof, (ii) up to about 90% of inorganic or organic detergency builder, and (iii) up to about 40% each of peroxygen bleaching agent and/or organic activator therefor, and (b) a bleach auxiliary comprising a water-soluble complex of iron and a multi-dentate ligand-forming chelating agent, wherein, at pH 10, the complex has a bleach catalytic activity as determined in the catalytic activity test described herein of at least 10% and the stability of the complex against hydroytic and oxidative degradation to water-insoluble iron species as determined in the complex stability test described herein is at least 75%, wherein the bleach auxiliary is in an amount sufficient to provide from 0.02% to 5% of iron complex, said bleach auxiliary containing by weight from 0 to 20% water.