# US 5,705,466 A · High bulk density granular detergents containing a percarbonate bleach and a powdered silicate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,705,466 A - Document ID: US5705466A - Status: Granted - Kind: A - Application number: 08/586,865 - Filed: 1996-01-24 - Granted: 1998-01-06 - Earliest claimed: 1993-08-17 - Assignees: The Procter & Gamble Company - Inventors: Gerard Marcel Baillely; Thomas Edward Cook - Web page: https://patentgrep.com/patent/US5705466A ## CPC - C11D 17/065: {High-density particulate detergent compositions} - C11D 3/08: Silicates - C11D 3/3907: {Organic compounds} - C11D 3/3942: {Inorganic per-compounds (C11D3/3902 takes precedence)} - 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 A granular detergent composition having a bulk density of at least 650 g/l and comprising at least 5% by weight of anionic surfactants, nonionic surfactants, or mixtures thereof, and further comprising: i) from 2% to 50% by weight of granular alkalimetal percarbonate, ii) from 0.7% to 20% by weight of powdered silicate, and wherein silicate particles having a particle size diameter of less than 425 micrometers comprise at least 0.7% by weight of the composition. ## Claims ### Claim 1 A granular detergent composition having a bulk density of at least 650 g/l and comprising at least 5% by weight of anionic surfactants, nonionic surfactants, or mixtures thereof, and further comprising: i) from 2% to 50% by weight of granular alkali metal percarbonate having a particle size range of from 100 micrometers to 1500 micrometers; and ii) from 0.7% to 20% by weight of an amorphous sodium silicate having an SiO.sub.2 :Na.sub.2 O molar ratio of less than 3.3:1 said amorphous sodium silicate being in powdered form; wherein sodium silicate particles having a particle size diameter of less than 425 micrometers comprise at least 0.7% by weight of the composition. ### Claim 2 (depends on 1) A granular composition according to claim 1 wherein said composition further comprises at least 0.5% by weight of a peracid precursor selected from the group consisting of tetraacetyl methylene diamine, tetraacetyl ethylene diamine, tetraacetyl hexylene diamine, 2-phenyl 4h-3 1-benzoxazin-4-one, acyloxybenzene sulphonates, benzoylcaprolactam, benzoyloxybenzene sulphonate and mixtures thereof. ### Claim 3 (depends on 1) A granular composition according to claim 1 wherein sodium silicate particles having a particle size of diameter less than 425 micrometers comprise at least 1% by weight of the composition. ### Claim 4 (depends on 3) A granular composition according to claim 3 wherein said amorphous sodium silicate has a ratio of SiO.sub.2 :Na.sub.2 O of less than 2.4. ### Claim 5 (depends on 1) A granular composition according to claim 1 wherein said percarbonate is coated with a coating material which comprises a soluble salt other than said amorphous sodium silicate and wherein the weight ratio of the coating material to percarbonate is in the range of from 1:200 to 1:4. ### Claim 6 (depends on 5) A granular composition according to claim 5 wherein said coating material is selected from the group consisting of carbonates, sulphates, citrates, silicates other than said amorphous sodium silicate, water-soluble anionic surfactants and mixtures thereof. ### Claim 7 (depends on 6) A granular composition according to claim 6 wherein said coating material is a mixture of sodium carbonate and sodium sulphate. ### Claim 8 (depends on 5) A granular composition according to claim 5 where said percarbonate is coated with an amount of a second sodium silicate other than said amorphous sodium silicate, wherein the level of second sodium silicate coating the percarbonate is no more than 2.2% by weight of the percarbonate. ### Claim 9 (depends on 1) A granular composition according to claim 1 wherein said composition comprises from 10% to 30% by weight percarbonate, and less than 3% by weight perborate monohydrate. ### Claim 10 (depends on 1) A composition according to claim 1 wherein the amorphous sodium silicates have a surface area of greater than 0.05 m.sup.2 /cc, and a porosity of greater than 6.5%. ### Claim 11 (depends on 2) A composition according to claim 2 wherein the peracid precursor is dry blended in the detergent composition and has a particle range of from 300 micrometers to 1500 micrometers. ### Claim 12 (depends on 5) A granular composition according to claim 5 wherein said coating material is selected from the group consisting of carbonates, sulphates, citrates, water-soluble anionic surfactants and mixtures thereof. ### Claim 13 A granular detergent composition comprising: i) from 2% to 50%, by weight of the composition, crystalline alkali metal percarbonate having a particle size range of from 100 micrometers to 1500 micrometers; and ii) from 1% to 20%, by weight of the composition, powdered amorphous sodium silicates having a SiO.sub.2 :Na.sub.2 O ratio of less than 3.3:1; wherein the bulk density of the composition is at least 650 g/l; sodium silicate particles having a particle size diameter of less than 425 micrometers comprise at least 0.7% by weight of the composition; and the composition comprises less than 3% by weight perborate monohydrate. ### Claim 14 (depends on 13) A composition according to claim 13 further comprising from 0.5% to 5% by weight of the composition, peroxyacid bleach precursor. ### Claim 15 (depends on 13) A composition according to claim 13 wherein the percarbonate is coated with a coating material selected from the group consisting of sodium sulphate, sodium carbonate, sodium citrate, linear benzene sulphonate, alkyl ether sulphate, magnesium silicate, and mixtures thereof; and wherein the weight ratio of the coating material to percarbonate is from 1:200 to 1:4. ### Claim 16 (depends on 12) A composition according to claim 12 further comprising sodium aluminosilicate zeolite of the formula: Na.sub.z {(AlO.sub.2).sub.z (SiO.sub.2).sub.y }.xH.sub.2 O wherein z and y are at least 6, the molar ratio of z to y is from 1.0 to 0.05, and x is at least 5; and wherein the sodium aluminosilicate zeolite has a particle size diameter of from 0.1 to 10 micrometers, a calcium ion exchange capacity of at least 200 mg equivalent of CaCO.sub.3 water hardness/g of aluminosilicate, and a calcium ion exchange rate of at least 130 mg equivalent of CaCO.sub.3 /liter/minute/(g/liter). ### Claim 17 (depends on 14) A composition according to claim 14 wherein at least 90% by weight of the bleach precursor has a particle size of less than 150 micrometers. ### Claim 18 (depends on 13) A composition according to claim 13 wherein the powdered sodium silicate is dry mixed in the granular detergent.