Patent EP0342177A2 successfully refreshed from Google Patents.
EP0342177A2
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EP
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Heavy duty liquid laundry detergents containing anionic and nonionic surfactant, builder and proteolytic enzyme
Assignee: Procter and Gamble Co
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Filing: 1989-05-10
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Granted: —
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Expires: 2009-05-10
Abstract
Abstract Heavy duty liquid laundry detergent compositions containing synthetic anionic and ethoxylated nonionic surfactant, detergency builder, specific proteolytic enzyme, an enzyme stabilization system, and water are disclosed. The compositions have a pH in a 10% by weight solution in water at 20°C of between about 7.0 and 9.0, a Critical Micelle Concentration of less than or equal to about 200 ppm, and an air/water Interfacial Tension above the Critical Micelle Concentration of less than or equal to about 32 dynes/cm at 35°C in distilled water. The compositions are preferably clear, homogeneous, stable and provide good cleaning performance, particularly through-the-wash on enzyme-sensitive stains.
Inventors
- 👤 Michael Stanford Showell
- 👤 William Conrad Wertz
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 07:38
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/66; C11D1/83; C11D3/00; C11D3/16; C11D3/38; C11D3/386; C11D3/38618; C11D1/02; C11D1/12; C11D1/14; C11D1/146; C11D1/29; C11D1/72
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
349 words
A heavy duty liquid laundry detergent composition comprising by weight: (a) from about 10% to 50% of a synthetic anionic surfactant; preferably from 15% to 40% by weight of anionic surfactant selected from the group consisting of alkyl sulfates containing from 10 to 18 carbon atoms, alkyl ethoxy sulfates containing from 10 to 18 carbon atoms and an average of up to 4 ethylene oxide units per mole or alkyl sulfate, linear alkylbenzene sulfonates containing from 11 to 13 carbon atoms, and mixtures thereof; (b) from 2% to 14% of an ethoxylated nonionic surfactant; preferably of the formula R¹(OC₂H₄) n OH, wherein R¹ is a C₁₀-C₁₆ alkyl group or a C₈-C₁₂ alkyl phenyl group, n is from 3 to 9, wherein said nonionic surfactant has an HLB (Hydrophilic-Lipophilic Balance) of from 6 to 14; most preferably from 3% to 5% of an ethoxylated nonionic surfactant which is a condensation product of C₁₂-C₁₅ alcohols with from 3 to 8 moles of ethylene oxide per mole of alcohol; (c) from 5% to 20% of a detergency builder; preferably from 0% to 10% by weight of a saturated fatty acid builder containing from 12 to 14 carbon atoms along with from 0% to 10% by weight of water-soluble polycarboxylate builder, preferably citric acid. (d) from 0.01% to 5%, preferably from 0.1% to 2%, of the proteolytic enzyme which has the following amino acid sequence: (e) from 0.5% to 15% of an enzyme stabilization system; preferably including from 0.5% to 15% by weight of a polyol containing only carbon, hydrogen and oxygen atoms, most preferably from about 1.5% to about 8% by weight of propylene glycol; and (f) from 30% to 80% of water; said composition containing (a) and (b) in a ratio of from 1:1 to 5:1; having a pH, in a 10% by weight solution in water at 20°C, of from 7.0 to 9.0; and having a Critical Micelle Concentration of less than or equal to 200 ppm, and an air/water Interfacial Tension above the Critical Micelle Concentration of less than or equal to 32 dynes/cm at 35°C in distilled water.
Claim 2
Dependent Claim
349 words
A heavy duty liquid laundry detergent composition comprising by weight: (a) from about 10% to 50% of a synthetic anionic surfactant; preferably from 15% to 40% by weight of anionic surfactant selected from the group consisting of alkyl sulfates containing from 10 to 18 carbon atoms, alkyl ethoxy sulfates containing from 10 to 18 carbon atoms and an average of up to 4 ethylene oxide units per mole or alkyl sulfate, linear alkylbenzene sulfonates containing from 11 to 13 carbon atoms, and mixtures thereof; (b) from 2% to 14% of an ethoxylated nonionic surfactant; preferably of the formula R¹(OC₂H₄) n OH, wherein R¹ is a C₁₀-C₁₆ alkyl group or a C₈-C₁₂ alkyl phenyl group, n is from 3 to 9, wherein said nonionic surfactant has an HLB (Hydrophilic-Lipophilic Balance) of from 6 to 14; most preferably from 3% to 5% of an ethoxylated nonionic surfactant which is a condensation product of C₁₂-C₁₅ alcohols with from 3 to 8 moles of ethylene oxide per mole of alcohol; (c) from 5% to 20% of a detergency builder; preferably from 0% to 10% by weight of a saturated fatty acid builder containing from 12 to 14 carbon atoms along with from 0% to 10% by weight of water-soluble polycarboxylate builder, preferably citric acid. (d) from 0.01% to 5%, preferably from 0.1% to 2%, of the proteolytic enzyme which has the following amino acid sequence: (e) from 0.5% to 15% of an enzyme stabilization system; preferably including from 0.5% to 15% by weight of a polyol containing only carbon, hydrogen and oxygen atoms, most preferably from about 1.5% to about 8% by weight of propylene glycol; and (f) from 30% to 80% of water; said composition containing (a) and (b) in a ratio of from 1:1 to 5:1; having a pH, in a 10% by weight solution in water at 20°C, of from 7.0 to 9.0; and having a Critical Micelle Concentration of less than or equal to 200 ppm, and an air/water Interfacial Tension above the Critical Micelle Concentration of less than or equal to 32 dynes/cm at 35°C in distilled water.
Claim 3
Dependent Claim
47 words
A heavy duty liquid laundry detergent composition according to Claim 1 further comprising from 0.15% to 1% by weight of a surfactant selected from the group consisting of quaternary ammonium, amine and amine oxide surfactants and mixtures thereof; preferably from 0.2% to 0.8% of monoalkyl trimethylammonium chloride.
Claim 4
Dependent Claim
55 words
A heavy duty liquid laundry detergent composition according to Claims 1 or 2 further comprising from 0% to 10% by weight of an acid basis of a tartrate succinate builder material selected from the group consisting of: i) wherein X is a salt-forming cation; ii) wherein X is a salt-forming cation; and iii) mixtures thereof.
Claim 5
Dependent Claim
33 words
A heavy duty liquid laundry detergent composition according to Claims 1, 2 or 3 additionally comprising from 0.2% to 0.6% by weight of water-soluble salts of ethylenediamine tetraacetic acid or diethylenetriamine pentaacetic acid.
Claim 6
Dependent Claim
28 words
A heavy duty liquid laundry detergent composition according to Claims 1, 2, 3 or 4 comprising from 0.01 to 50 millimoles of calcium ion per liter of composition.
Claim 7
Dependent Claim
26 words
A heavy duty liquid laundry detergent composition according to Claims 1, 2, 3, 4 or 5 comprising from 0.03% to 0.6% by weight of calcium formate.
Claim 8
Dependent Claim
37 words
A heavy duty liquid laundry detergent composition according to Claims 1, 2, 3, 4, 5 or 6 further comprising from 0.05% to 5% by weight of formate, preferably from 0.4% to 1.5% by weight of sodium formate.
Claim 9
Dependent Claim
30 words
A heavy duty liquid laundry detergent composition according to Claims 1, 2, 3, 4, 5, 6 or 7 further comprising from 0.5% to 3% by weight of tetraethylene pentamine ethoxylate.
Claim 10
Dependent Claim
46 words
A heavy duty liquid laundry detergent composition according to Claims 1, 2, 3, 4, 5, 6, 7, or 8 further comprising from 0 to 0.04 moles per 100 grams of composition of an alkanolamine selected from the group consisting of monoethanolamine, diethanolamine, triethanolamine, and mixtures thereof.
Claim 11
Dependent Claim
35 words
A heavy duty liquid laundry detergent composition according to Claims 1, 2, 3, 4, 5, 6, 7, 8 or 9 further comprising from 0% to 15% by weight of a silicone based suds suppressor agent.
References Cited (Backward Citations)
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