Detergent composition

Abstract: A detergent composition which has an excellent detergency against muddy dirt of clothing. It comprises (a) nonionic surfactant, (b) fatty acid or salt thereof and (c) sulfosuccinic amide, and further (d) anionic surfactant as occasion demands.

Description: Field of the Invention : The present invention relates to a detergent composition, particularly to a detergent composition which has excellent detergency against clothing stained with inorganic dirt. Description of the Prior Art : Clothing dirt can be divided mostly into organic dirt and inorganic dirt. The organic dirt consists mainly of sebaceous dirt from the human body in case of clothing such as underwear. A detergent composition comprising a nonionic surfactant has excellent detergency against oily dirt such as sebaceous dirt. On the other hand, the inorganic dirt consists mainly of mud originated from dust suspended in the air or soil. In general, the clothing dirt is a mixture of organic dirt and inorganic dirt. Up to the present, various studies have been conducted in order to enhance detergency against inorganic dirt. For example, Japanese Laid-Open No. 54-39411 and 54-130509 disclose a combined use of certain water soluble cationic surfactants. Japanese Laid-Open No. 51-142489 and 56-150048 disclose a combined use of certain amphoteric surfactants. Japanese Laid-Open No. 53-1045582 discloses a combined use of carboxyalkylated alkylether-type anionic surfactants. However, the detergents mentioned above do not have sufficient detergency against inorganic dirt, especially against mud stuck on socks, etc. Japanese Laid-Open No. 61-236898 discloses a softening, antistatic detergent composition which comprises nonionic surfactant, mono long-chain alkyl quaternary ammonium salt and sulfo succinamate (sulfo succinic acid amide), and further anionic surfactant as occasion demands. Though this composition is similar to the composition of the present invention, it does not have sufficient detergency against inorganic dirt. The present inventors have made intensive studies on the detergent composition to solve the problem mentioned above and, as a result, found that detergency against muddy dirt can be synergistically enhanced by using jointly a higher fatty acid or salt thereof and a sulfosuccinic amide in combination with a nonionic surfactant as ingredients of a detergent composition. The present invention was accomplished based on the above findings. Accordingly, the present invention provides for a detergent composition which comprises 10 to 70% by weight of (a) nonionic surfactant, 2 to 20% by weight of (b) fatty acid having 8-22 carbon atoms or salt thereof, and 1 to 40% by weight of (c) sulfosuccinic amide of the formula (I). wherein R₁ represents C₆-C₂₂ alkyl or alkenyl, R₂ represents hydrogen atom, C₁-C₃ alkyl, carboxyalkyl having C₁-C₃ alkyl or 1,2-dicarboxyalkyl having C₁-C₃ alkyl, M represents alkali metal, alkaline earth metal, alkanolamine or ammonium. Although nonionic surfactants of (a) component of the invention are not limited specifically, the following compounds are illustrated for examples. (1) Polyoxyethylene alkyl or alkenyl ether having C₁₀-C₂₀ (average) alkyl or alkenyl group, and added with 1-20 moles of ethylene oxide. (2) Polyoxyethylene alkylphenyl ether having C₆-C₁₂ (average) alkyl group, and added with 1-20 moles of ethylene oxide. (3) Polyoxypropylene alkyl or alkenyl ether having C₁₀-C₂₀ (average) alkyl or alkenyl group, and added with 1-20 propylene oxide. (4) Polyoxybutylene alkyl or alkylene ether having C₁₀-C₂₀ (average) alkyl or alkenyl group, and added with 1-20 moles of butylene oxide. (5) Nonionic surfactant having C₁₀-C₂₀ (average) alkyl or alkenyl group and added with 1-30 in sum of ethylene oxide and propylene oxide or butylene oxide (molar ratio of ethylene oxide to propylene oxide or butylene oxide is in the range of 0.1 / 9.9 - 9.9 / 0.1 ). (6) Fatty acid alkanol amide of the formula (II) or alkylene oxide adduct thereof. wherein R'₁ represents C₁₀-C₂₀ alkyl or alkenyl, R'₂ represents H or CH₃, n₁ is integer of 1 to 3, m₁ is integer of 0 to 3. (7) Fatty acid esters which are derived from C₁₀-C₂₀ (average) fatty acid and polyol (glycerine, sorbitol, sorbitan, pentaerythritol, sucrose), or polyalkylene oxide adduct thereof. (8) Alkylamine oxide of the formula (III) wherein R'₃ represents C₆-C₂₀ alkyl or alkenyl, R'₄ represents C₁-C₃ alkyl, hydroxyalkyl or polyoxyethylene chain having 2-7 moles of ethylene oxide, R'₅ is the same group as R'₃ or R'₄. (9) Alkylglycoside of the formula (IV) R'₆(OR'₇) x G y (IV) wherein R'₆ represent straight or branched C₈-C₁₈ alkyl, alkenyl or alkylphenyl, R'₇ represents C₂-C₄ alkylene, G represents a radical derived (originated) from aldose having from 5 to 6 carbons. X is 0-5 on average, preferably 0-2, y is 1-10 on average, preferably 1.1-3. Aldose having from 5 to 6 carbons includes glucose, fructose, maltose and sucrose. (10) Polyethylene oxide adduct of polypropylene glycol, of which the molecular weight of propylene glycol is 1000-4000 and the average number of polyethylene oxide addition is 10-60. Usually, those nonionic surfactants (a) having HLB of 6-19, preferably 8-17, are used. Among these, nonionic surfactants of groups (1), (2), (8) and (9) are preferable because of their detergency. The amount of the nonionic surfactant (a) in the detergent composition is in the range of 10 to 70 wt.%, preferably 15 to 40 wt.%. C₈-C₂₂ saturated or unsaturated fatty acids or salts thereof can be illustrated as fatty acids or salts thereof which are (b) ingredients of the present invention. Among specific examples are coconut fatty acid, palm fatty acid, palm core fatty acid, and alkali metal salt, ammonium salt and alkanolamine salt thereof can be illustrated. The amount of the (b) ingredient in the detergent composition is in the range of 2 to 20 wt.%, preferably 2 to 15 wt.%. If the amount of the (b) ingredient is less than 2 wt.%, the detergent composition does not have sufficient detergency against muddy dirt. If the amount of the (b) ingredient is more than 20 wt.%, a soap-like odor remains on clothing after washing. As the (c) ingredient of the present invention, sulfosuccinic amide of the formula (I) can be used. Among these, the compound of the formula (I) wherein R₁ is C₁₀-C₁₈, preferably C₁₀-C₁₄ alkyl, R₂ is a hydrogen atom or C₁-C₃ alkyl, preferably methyl group, are preferred. Examples include disodium-N-lauryl sulfosuccinic amide, dosodium-N-stearyl sulfosuccinic amide, disodium-N-lauryl-N-methyl sulfosuccinic amide, disodium-N-oleyl sulfosuccinic amide, dimagnesium-N-lauryl sulfosuccinic amide, diammonium-N-lauryl sulfosuccinic amide, etc. These compounds are described in U.S. Patent 4,790,856. They are commercially available as Alkasurf SS-TA and Alkasurf SS-OA from Alkaril Chemicals. They can be obtained by reacting maleic anhydride with alkylamine to get amide, and sulfonating the amide with sodium sulfide The amount of (c) ingredient in the composition is in the range of 1 to 40 wt.%, preferably 5 to 30 wt.%. If the amount of the (c) ingredient is less than 1 wt.%, the composition does not have a sufficient detergency effect against the inorganic dirt. If the amount of the (c) ingredient is more than 40 wt.%, antire-deposition action against carbon decreases. In other words, dirt removed by washing can be redeposited on the clothing, particularly during washing and rinsing, if the amount of ingredient (c) exceeds about 40 wt.%. Detergency against other inorganic dirt such as carbon black can be enhanced by incorporating an anionic surfactant as an ingredient (d) into the detergent composition of the present invention. Preferable anionic surfactants (d) are illustrated below. (1) Straight or branched alkylbenzene sulfonate having C₁₀-C₁₆ (average) alkyl group. (2) Alkyl or alkenyl ether sulfate having straight or branched C₁₀-C₂₀ (average) alkyl or alkenyl group, and added with 0.5 - 8 moles (average) of ethylene oxide, propylene oxide, butylene oxide, ethylene oxide/propylene oxide (ratio = 0.1 / 9.9 - 9.9 / 0.1 or ethylene oxide/butylene oxide (ratio = 0.1 / 9.9 - 9.9 / 0.1 . (3) Alkyl or alkenyl sulfate having C₁₀-C₂₀ (average) alkyl or alkenyl group. (4) Olefin sulfonate having C₁₀-C₂₀ (average). (5) Alkane sulfonate having C₁₀-C₂₀ (average). (6) α-sulfo fatty acid salt or ester salt of the following formula wherein Y represents C₁-C₃ alkyl or a counter ion, Z is a counter ion. R represents C₁₀-C₂₀ alkyl or alkenyl group. Examples of counter ions include alkali metal, alkaline earth metal and alkanol amine. Among these, anionic surfactants of groups (1), (2), (4) and (5) are especially preferable. Various components other than (a), (b), (c) and (d) can be incorporated into the present detergent composition unless the component impedes the performance of the invention so as to make the composition an aqueous fluid, a non-aqueous fluids paste, a powder or a bar detergent. Components which can be incorporated are illustrated below. (1) Hydrotrope ethanol, ethylene glycol, propylene glycol, propanol, lower alkylbenzene sulfonate such as p-toluenesulfonate, benzoic acid, urea, etc. (2) Chelating agent zeolite, citric acid salt, citrate, ethylenediamine tetraacetate, nitrilo triacetate, layered silicate, tripolyphosphate, etc. (3) Alkali agent sodium carbonate, potassium carbonate, sodium silicate, alkanol amine, etc. (4) Filler water, sodium sulfate, etc. (5) Enzyme amylase, protease, cellulase, lipase, etc. (6) Dispersing agent acrylic acid polymer, maleic acid polymer polyethylene glycol, carboxymethyl cellulose, etc. (7) Bleaching agent sodium percarbonate, sodium perborate, etc. (8) Others fluorescence dye, perfume, colorant, preservative, etc. [EXAMPLE] The present invention is described in detail by way of the following examples. The present invention, however, is not limited to these examples. Various detergent compositions shown in Table 1 were prepared, and were respectively evaluated with respect to their detergency by methods described below. Cloth soiled with mud (artificially soiled cloth) Kanuma Akadama soils for horticultural use was dried at 120°C ± 5°C for 4 hours and pulverized. After passed through 150 Mesh (100 µm) sieve and dried 120°C ± 5°C for 2 hours, 150g of the soil was dispersed in 1 ℓ of perchloroethylene. After muslin #2023 cloth was dipped in the perchloroethylene solution, the cloth was brushed to remove the solution and excess dirt attached (refer to Japanese Laid-Open No. 55-26473). Cloth soiled with sebum and carbon (artificially soiled cloth) *Model composition of sebum and carbon dirt Carbon black 15% Cottonseed oil 60% Cholesterol 5% Oleic acid 5% Palmitic acid 5% Liquid paraffin 10% One kg of the above composition was dispersed in 80 ℓ of perchloroethylene. Muslin #2023 cloth was dipped in the perchloroethylene solution to be soiled and was dried to remove perchloroethylene. Washing condition and evaluation method Five pieces of cotton cloth (10 cm x 10 cm) soiled with mud or sebum/carbon were respectively put into 1 ℓ detergent aqueous solution, and then washed in Terg-O-Tometer with 100 rpm. Washing conditions are as following [WASHING CONDITION] Washing time 10 minutes Concentration of detergent 0.133% Hardness of Water 4° Water temperature 20°C Rinse 5 min. with city water Reflective coefficients of an original cloth before being artificially soiled, a soiled cloth before washing and a soiled cloth after washing were measured by self-record colorimeter (manufactured by Shimazu Ltd.) at 460 µm. Detergency was evaluated by means of detergency coefficient calculated by the following formula. The results are shown in Table 1.

Claims: A detergent composition which comprises 10 to 70% by weight of (a) nonionic surfactant, 2 to 20% by weight of (b) fatty acid having 8-22 carbon atoms or salt thereof, and 1 to 40% by weight of (c) sulfosuccinic amide of the formula (I) wherein R₁ is C₆-C₂₂ alkyl or alkenyl, R₂ is hydrogen atom, C₁-C₃ alkyl, carboxylalkyl having C₁-C₃ alkyl or 1,2-dicarboxyalkyl having C₁-C₃ alkyl, M is alkali metal, alkaline earth metal, alkanolamine or ammonium. The composition of Claim 1, which further comprises 5 to 30% by weight of (d) anionic surfactant. The composition of Claim 1, wherein said (a) nonionic surfactant is one or more selected from the group consisting of polyoxyethylene alkyl ethers, polyoxyethylene alkylphenyl ethers and alkyl glycosides. The composition of Claim 2, wherein said (a) nonionic surfactant is one or more selected from the group consisting of polyoxyethylene alkyl ethers, polyoxyethylene alkylphenyl ethers and alkyl glycosides. The composiiton of claim 2, wherein said (d) anionic surfactant is one or more selected from the group consisting of alkylbenzene sulfonates, polyoxyethylene alkylether sulfates, olefin sulfonates and alkane sulfonates.

Inventors: SAI FUMIO, TAGATA SHUJI, SAI, FUMIO, TAGATA, SHUJI
Applicants: KAO CORP, KAO CORPORATION
Application year: 1990
Main classification: C11D10
IPC codes: C11D1, C11D10