# US 10,370,621 B2 · Bleaching formulations comprising particles and transition metal ion-containing bleaching catalysts > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,370,621 B2 - Document ID: US10370621B2 - Status: Granted - Kind: B2 - Application number: 15/044,462 - Filed: 2016-02-16 - Published: 2016-06-09 - Granted: 2019-08-06 - Earliest claimed: 2013-08-16 - Assignees: Chemsenti Limited - Applicants: Chemsenti Limited - Inventors: Fabien Pierre Guy Gaulard; Karin Maaijen; Ronald Hage - Web page: https://patentgrep.com/patent/US10370621B2 ## CPC - C11D 3/3932: {Inorganic compounds or complexes} - C11D 3/12: Water-insoluble compounds - C11D 3/124: {Silicon containing, e.g. silica, silex, quartz or glass beads} - C11D 3/126: {in solid compositions} - C11D 3/128: {Aluminium silicates, e.g. zeolites (C11D3/1253 takes precedence)} - C11D 3/38672: {Granulated or coated enzymes} - C11D 3/3935: {granulated, coated or protected} - C11D 17/0039: {Coated compositions or coated components in the compositions, (micro)capsules} - C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL ## Abstract The present invention relates to bleaching formulations comprising transition metal ion-containing bleaching catalysts, which formulations additionally comprise coated particles having meltable cores that comprise an inorganic solid support material and/or a catalase enzyme; and to the coated particles per se. The invention also relates to uses of the bleaching formulations and the coated particles described herein in methods of bleaching. ## Claims ### Claim 1 A bleaching formulation comprising one or more particles and a transition metal ion-containing bleaching catalyst separate from the particles, the particles comprising: (i) a core comprising an inorganic solid support material selected from the group consisting of clays, aluminum silicates, silicates, silicas, carbon black and activated carbon, and/or a catalase enzyme or a mimic thereof; and an amount of about 0 to about 10 wt % of a transition metal ion-containing bleaching catalyst, the amount of the catalyst being with respect to the weight of the core; and (ii) a coating encapsulating the core, said coating comprising a material that melts at a temperature of between about 30° C. and about 90° C., with the proviso that, where the inorganic solid support material is talc or a clay, the core does not comprise a peroxy compound or source thereof or a catalase enzyme or mimic thereof, and, wherein said core reduce(s), upon melting of said coating, the oxidative propensity of a medium comprising hydrogen peroxide and said bleaching formulation. ### Claim 2 (depends on 1) The formulation of claim 1, wherein the inorganic solid support material is a clay. ### Claim 3 (depends on 2) The formulation of claim 2, wherein the clay is bentonite. ### Claim 4 (depends on 1) The formulation of claim 1, wherein the core comprises calcium carbonate-and/or zeolite-supported catalase. ### Claim 5 (depends on 1) The formulation of claim 1, wherein there is no transition metal ion-containing bleaching catalyst in the core. ### Claim 6 (depends on 1) The formulation of claim 1, wherein the catalyst separate to the particles comprises a mononuclear or dinuclear complex comprising a ligand of formula (I): wherein: p is 3; R is independently selected from the group consisting of hydrogen, C1-C24alkyl, CH2CH2OH and CH2COOH; or one R is linked to the nitrogen atom of another Q of another ring of formula (I) via a C2-C6 alkylene bridge, a C6-C10 arylene bridge or a bridge comprising one or two C1-C3 alkylene units and one C6-C10 arylene unit, which bridge may be optionally substituted one or more times with independently selected C1-C24 alkyl groups; and R1, R2, R3, and R4 are independently selected from H, C1-C4alkyl and C1-C4-alkylhydroxy. ### Claim 7 (depends on 6) The formulation of claim 6, wherein the catalyst separate to the particles comprises 1,2-bis(4,7-dimethyl-1,4,7-triazacyclonon-l-yl)ethane and the coating melts between about 50 and about 70° C. ### Claim 8 (depends on 6) The formulation of claim 6, wherein the catalyst separate to the particles comprises 1,4,7-trimethyl-1,4,7-triazacyclononane and the coating melts between about 30 and about 50° C. ### Claim 9 (depends on 1) The formulation of claim 1, wherein the catalyst separate to the particles comprises one or more counterions selected from the group consisting of Cl−, NO3−, SO42− and acetate that are not coordinated to a transition metal ion of the catalyst. ### Claim 10 (depends on 1) The formulation of claim 1, which further comprises an alkali metal percarbonate. ### Claim 11 (depends on 1) The formulation of claim 1, which further comprises a surfactant. ### Claim 12 A particle comprising: (i) a core consisting essentially of an inorganic solid support material selected from the group consisting of clays, aluminum silicates, silicates, silicas, carbon black and activated carbon, and/or a catalase enzyme or a mimic thereof; and, (ii) a coating encapsulating the core, said coating comprising a material that melts at a temperature of between about 30° C. and about 90° C., with the proviso that, where the inorganic solid support material is talc or a clay, the core does not comprise a peroxy compound or source thereof or a catalase enzyme or mimic thereof; and, wherein said core reduce(s), upon melting of said coating, the oxidative propensity of a medium comprising hydrogen peroxide and a transition metal ion-containing bleaching catalyst. ### Claim 13 A method comprising: (a) contacting a substrate with water and a bleaching formulation to form a mixture, and, (b) setting temperature of the mixture; wherein the bleaching formulation comprises one or more particles and a transition metal ion-containing bleaching catalyst salt separate from the particles, the particles comprising: (i) a core comprising an inorganic solid support material selected from the group consisting of clays, aluminum silicates, silicates, silicas, carbon black and activated carbon, and/or a catalase enzyme or a mimic thereof; and an amount of about 0 to about 10 wt % of a transition metal ion-containing bleaching catalyst, the amount of the catalyst being with respect to the weight of the core; and (ii) a coating encapsulating the core, said coating comprising a material that melts at a temperature of between about 30° C. and about 90° C., wherein said core reduce(s), upon melting of said coating, the oxidative propensity of the mixture comprising hydrogen peroxide and said transition metal ion-containing bleaching catalyst, and, wherein the temperature of the mixture is set to be no higher than that at which said material of the coating melts. ### Claim 14 (depends on 1) A method comprising contacting a substrate with water and a bleaching formulation as defined in claim 1. ### Claim 15 (depends on 13) The method of claim 13, which is a method of cleaning a textiles or a non-woven fabric, the method comprising contacting the textile or the non-woven fabric with water and the bleaching formulation. ### Claim 16 (depends on 14) The method of claim 14, which is a method of cleaning a textiles or a non-woven fabric, the method comprising contacting the textile or the non-woven fabric with water and the bleaching formulation. ### Claim 17 (depends on 13) The method of claim 13, wherein the catalysts salt comprises a mononuclear or dinuclear complex comprising a ligand of formula (I): wherein: p is 3; R is independently selected from the group consisting of hydrogen, C1-C24alkyl, CH2CH2OH and CH2COOH; or one R is linked to the nitrogen atom of another Q of another ring of formula (I) via a C2-C6 alkylene bridge, a C6-C10 arylene bridge or a bridge comprising one or two C1-C3 alkylene units and one C6-C10 arylene unit, which bridge may be optionally substituted one or more times with independently selected C1-C24 alkyl groups; and R1, R2, R3, and R4 are independently selected from H, C1-C4alkyl and C1-C4-alkylhydroxy. ### Claim 18 (depends on 14) The method of claim 14, wherein the catalysts salt comprises a mononuclear or dinuclear complex comprising a ligand of formula (I): wherein: p is 3; R is independently selected from the group consisting of hydrogen, C1-C24alkyl, CH2CH2OH and CH2COOH; or one R is linked to the nitrogen atom of another Q of another ring of formula (I) via a C2-C6 alkylene bridge, a C6-C10 arylene bridge or a bridge comprising one or two C1-C3 alkylene units and one C6-C10 arylene unit, which bridge may be optionally substituted one or more times with independently selected C1-C24 alkyl groups; and R1, R2, R3, and R4 are independently selected from H, C1-C4alkyl and C1-C4-alkylhydroxy. ### Claim 19 (depends on 6) The formulation of claim 6, wherein the catalyst separate to the particles comprises 1,4,7-trimethyl-1,4,7-triazacyclononane and the coating melts between about 40 and about 50° C. ### Claim 20 (depends on 12) The particle of claim 12, wherein said core contains no transition metal ion-containing bleaching catalyst.