Definitions

• This invention relates to laundry detergent components and compositions containing encapsulated perfumes. More particularly, this invention relates to laundry detergent components and compositions containing modified soil-release polymers and having enhanced perfume impact through encapsulated perfumes.
• soil release polymers are used to enhance cleaning ability of detergents. During the laundering operation, these soil release polymers deposit onto the surface of fabrics immersed in the wash solution. The deposited polymers then form a film which remains on the fabric after it is removed from the wash solution and dried. So far it was therefore necessary to limit the level of soil release polymers in order to achieve an efficient perfume delivery onto the fabrics.
• the present invention relates to laundry detergent composition or component compositions comprising encapsulated perfumes and certain modified polyesters. Detailled description of the invention
• Modified polyesters herein are substantially linear end- capped esters having molecular weight ranging from about 500, to about 20,000, preferably from about 500 to about 8,000; said ester consisting essentially of, on a molar basis :
• ii) from about 0.5 to about 66 moles of units selected form the group consisting of : a) oyethyleneoxy units; b) oxy-l,2-propyleneoxy units; and c) mixtures of a) and b) ;
• iii) from about 1.5 to about 40 moles of terephthaloyl units; and optionally iv) from 0 to about 26 moles of 5-sulfoisphtholoyl units of the formula -(0)C(C 6 H3) (S0 3 M)C(0)-, wherein M is a salt forming cation such as an alkali metal or tetraalkylammonium ion.
• polyesters are described in the Applicants copending application USSN 08/088705.
• Preferred polyesters herein are random copolymers of dimethyl terephtalate, dimethyl sulfoisophtalate, ethylene glycol and 1-2 propane diol, the end groups consisting primarily of sulphobenzoate and secondarily of mono esters of ethylene glycol and/or propane-diol.
• the target being to obtain is a polymer capped at both end by sulphobenzoate groups, "primarily", in the present context most of said copolymers herein will be end-capped by sulphobenzoate groups. However, some copolymers will be less than fully capped, and therefore their end groups may consist of monoester of ethylene glycol and/or propane 1-2 diol, thereof consist “secondarily” of such species.
• polyesters herein contain about 46% by weight of dimethyl terephtalic acid, about 16% by weight of propane -1.2 diol, about 10% by weight ethylene glycol, about 13% by weight of dimethyl sulfobenzoid acid and about 15% by weight of sulfoisophtalic acid, and have a molecular weight of about 3.000.
• the polyesters and their method of preparation are described in detail in EPA 311 342.
• the encapsulated perfumes comprise perfume dispersed in certain carrier materials.
• perfume means any odoriferous material or any material which acts as a malodor counteractant. In general, such materials are characterized by a vapor pressure greater than atmospheric pressure at ambient temperatures.
• the perfume or deodorant materials employed herein will most often be liquid at ambient temperatures, but also can be solids such as the various tamphoraceous perfumes known in the art.
• a wide variety of chemicals are known for perfumery uses, including materials such as aldehydes, ketones, esters and the like. More commonly, naturally occurring plant and animal oils and exudates comprising complex mixtures of various chemical components are known for use as perfumes, and such materials can be used herein.
• the perfumes herein can be relatively simple in their composition or can comprise highly sophisticated, complex mixtures of natural and synthetic chemical components, all chosen to provide any desired odor.
• Perfumes which are normally solid can also be employed in the present invention. These may be admixed with a liquefying agent such as a solvent prior to incorporation into the particles, or may be simply melted and incorporated, as long as the perfume would not sublime or decompose upon heating.
• a liquefying agent such as a solvent
• the invention also encompasses the use of materials which act as malodor counteractants. These materials, although termed “perfumes” hereinafter, may not themselves have a discernible odor but can conceal or reduce any unpleasant odors. Examples of suitable malodor counteractants are disclosed in U.S. Patent No. 3,102,101, issued August 27, 1963, to Hawley et al.
• capsules provided by microencapsulation.
• the perfume comprises a capsule core which is coated completely with a material which may be polymeric.
• U.S. Patent 4,145,184, Brain et al, issued March 20, 1979, and U.S. Patent 4,234,627, Schilling, issued November 18, 1980, teach using a tough coating material which essentially prohibits the diffusions out of the perfume.
• the perfume is delivered to fabric via the microcapsules and is then released by rupture of the microcapsules such as would occur with manipulation of the fabric.
• the choice of encapsulated material to be used in the perfume particles of the present invention will depend to some degree on the particular perfume to be used. Some perfumes will require a greater amount of protection than others and the encapsulating material to be used therewith can be chosen accordingly.
• the encapsulating materials of the perfumed particles can be a water-insoluble or water-soluble encapsulating material.
• Nonlimiting examples of useful water-insoluble materials include polyethylenes, polyamides, polystyrenes, polyisoprenes, polycarbonates, polyesters, polyacrylates, vinyl polymers and polyurethanes and mixtures thereof.
• Nonlimiting examples of suitable water-soluble coating materials include such substances as methyl cellulose, maltodextrin and gelatin. Such coatings can comprise from about 1% to about 25% by weight of the particles.
• Especially suitable water soluble encapsulating materials are capsules which consist of a matrix of polysaccharide and polyhydroxy compounds such as described in GB 1,464,616.
• Suitable water soluble or water dispersible encapsulating materials comprise dextrins derived from ungelatinized starch acid-esters of substituted dicarboxylic acids such as described in US 3,455,838. These acid-ester dextrins are,preferably, prepared from such starches- as waxy maize, waxy sorghum, sago, tapioca and potato. Suitable examples of said encapsulating materials are N-Lok ®, manufactured by National Starch, Narlex ® (ST and ST2), and Capsul E ®. These encapsulating materials comprise pregelatinised waxy maize starch and, optionally, glucose. The starch is modified by adding monofunctional substituted groups such as octenyl succinic acid anhydride.
• Water-soluble encapsulating materials are especially suitable when perfume has to be incorporated into a dry granular or powder product. Such a water-soluble capsule will then protect perfume during storage in product from other conventional laundry composition compounds such as bleach, enzymes and clay.
• a material that is pH sensitive i.e., a material that will remain as a coating on the particle in one pH environment but which would be removed from the particle in a different pH environment.
• a material could be used to encapsulate the perfume in a liquid fabric softening composition having a pH of about 3.
• the coating material could be stripped away.
• the perfume may also be encapsulated with a material that makes the particles more substantive to the surface being treated for example, fabric in the laundry process. Such materials help to deliver the particles to the fabric and maximize perfume release directly on the fabric. Generally, these materials are water-insoluble cationic materials. Examples of useful material include any of the cationic (including imidazolinium) compounds listed in U.S. Patent 3,686,025, Morton, issued August 22, 1972, incorporated herein by reference.
• Such materials are well known in the art and include, for example, the quaternary ammonium salts having at least one, preferably two, CIQ ⁇ C 20 fatty alkyl substituent groups; alkyl imidazolinium salts wherein at least one alkyl group contains a Cg-C25 carbon "chain”; the c 12 ⁇ c 20 alkyl pyridinium salts, and the like.
• the encapsulated perfume particles can be made by mixing the perfume with the encapsulating matrix by spray-drying emulsions containing the encapsulating material and the perfume.
• the particle size of the product from the spray-drying tower can be modified. These modifications can comprise specific processing steps such as post-tower agglomeration steps (e.g. fluidised bed) for enlarging the particle size and/or processing steps wherein the surface properties of the encapsulates are modified, e.g. dusting with hydrophobic silica in order to reduce the hygroscopicity of the encapsulates.
• a particularly preferred encapsulation process is an e ulsification process followed by spray-drying and finally dusting with silica.
• the emulsion is formed by :
• the perfume oil is then added to the above mixture in the ratio of 0.8-1.05 : 1: 2, and the mixture is then emulsified using a high shear mixer.
• the shearing motion must produce oil droplets below 1 micron and the emulsion must be stable in this form for at least 20 mins (the function of the starch is to stabilise the emulsion once its mechanically made) .
• the mixture is spray-dried in a co-current tower fitted with a spinning disk atomiser.
• the drying air inlet temperature is low 150-200°C. This type of spray-drying ensures minimum loss of perfume and high drying rate.
• the granules have a particulate size of 50-150 microns.
• the resulting dried encapsulates can contain up to 5% unencapsulated oil at the surface of the granules.
• hydrophobic silica can be optionally added to the encapsulates via a ribbon blender.
• perfume loading would allow for aesthetically pleasing fragrance of the composition itself. Upon opening the package containing the composition and as the product is added to water, this immediate release of fragrance may be desirable.
• This perfume would be added via conventional means, e.g., mixing, as is, into a liquid composition or spraying onto dry product compositions.
• the laundry additive according to the composition of the present invention can be incorporated into a wide variety of compositions which deliver a perfume to a fabric including detergent and rinse added compositions.
• an amount of the perfume particles is incorporated in the composition so as to provide the composition with from about 0.001% to about 10%, preferably from 0.1% to 3% perfume.
• the modified polyesters will be present in the detergent compositions from 0.1% to 10%, preferably from 0.1% to 5% by weight of the total detergent composition.
• the clay softening system hereof will comprise a fabric softening clay present in an amount of at least 0.5%, preferable from 4% to 30% by weight of the detergent composition.
• the preferred clays are of the smectite type.
• Smectite type clays are widely used as fabric softening ingredients in detergent compositions. Most of these clays have a cation exchange capacity of at least 50 eq./lOOg.
• Smectite clays can be described as three-layer expandable materials, consisting of alumino-silicates or magnesium silicates.
• smectite-type clays There are two distinct classes of smectite-type clays; in the first, aluminium oxide is present in the silicate crystal lattice, in the second class of smectites, magnesium oxide is present in the silicate crystal lattice.
• the general formulas of these smectites are AI2 (Si2 ⁇ 5)2 (OH) 2 and Mg3 (Si2 ⁇ 5) (OH)2, for the aluminium and magnesium oxide type clay, respectively.
• the range of the water of hydration can vary with the processing to which the clay has been subjected.
• atom substitution by iron and magnesium can occur within the crystal lattice of the smectites, while metal cations such as Na + , Ca 2+ , as well as H + can be co-present in the water of hydration to provide electrical neutrality.
• clays on the basis of one cation predominantly or exclusively absorbed.
• a sodium clay is one in which the absorbed cation is predominantly sodium.
• Such absorbed cations can become involved in equilibrium exchange reactions with cations present in aqueous solutions.
• one equivalent weight of solution cation replaces an equivalent of sodium, for example, and it is customary to measure clay cation exchange capacity in terms of milliequivalents per lOOg. of clay (meq/100g.).
• the cation exchange capacity of clays can be measured in several ways, including electrodialysis, by exchange with ammonium ion followed by titration, or by a methylene blue procedure, all as set forth in Grimshaw, The Chemistry and Physics of Clays, Interscience Publishers, Inc. pp. 264- 265(1971).
• the cation exchange capacity of a clay mineral relates to such factors as the expandable properties of the clay, the charge of the clay, which in turn, is determinated at least in part by the lattice structure, and the like.
• the ion exchange capacity of clays varies widely in the range from about 2 meq/100 g.
• Illite clays have an ionexchange capacity somewhere in the lower portion of the range, ca. 26 meq/100 g. for an average illite clay.
• illite and kaolinite clays are not useful in the instant compositions. Indeed such illite and kaolinite clays constitute a major component of clay soils.
• smectites such as nontronite having an ionexchange capacity of approximately 50 meq/100 g.
• saponite which has an ion exchange capacity greater than 70 meq/100g.
• the smectite clays commonly used for this purpose herein are all commercially available. Such clays include, for example, montmorillonite, volchonskoite, nontronite, hectorite, saponite, sauconite, and vermiculite.
• the clays herein are available under commercial names such as "fooler clay” (clay found in a relatively thin vein above the main bentonite or montmorillonite veins in the Black Hills) and various tradenames such as Thixogel #1 (also, “Thixo-Jell”) and Gelwhite GP from Georgia Kaolin Co.
• smectite-type minerals obtained under the foregoing commercial and tradenames can comprise mixtures of the various discrete mineral entitites. Such mixtures of the smectite minerals are suitable for use herein.
• Preferred for use herein are the montmorrillonite clays.
• hectorites of natural origin in the form of particles having the general formula
• the value of (x+y) is the layer charge of the hectorite clay.
• Such hectorite clays are preferably selected on the basis of their layer charge properties, i.e. at least 50% is in the range of from 0.23 to 0.31.
• hectorite clays of natural origin having a layer charge distribution such that at least 65% is in the range of from 0.23 to 0.31.
• the hectorite clays suitable in the present composition should preferably be sodium clays, for better softening activity.
• Sodium clays are either naturally occuring, or are naturally-occuring calcium-clays which have been treated so as to convert them to sodium-clays. If calcium-clays are used in the present compositions, a salt of sodium can be added to the compositions in order to convert the calcium clay to a sodium clay. Preferably, such a salt is sodium carbonate. typically added at levels of up to 5% of the total amount of clay.
• hectorite clays suitable for the present compositions include Bentone EW and Macaloid, from NL Chemicals, N.J., U.S.A., and hectorites from Industrial Mineral Ventures.
• the clay softening system herein can comprise clay- flocculating agents.
• the compositions herein may comprise, from 0.05% to 20% by weight of the clay, of flocculating agent, if its molecular weight is 150.000-800.000 and from 0.005% to 2%, by weight of the clay, it its molecular weight is from 800.000 to 5 million. Most of these materials are fairly long chain polymers and copolymers derived from such monomers as ethylene oxide, acrylamide, acrylic acid, dimethylamino ethyl methacrylate, vinyl alcohol, vinyl pyrrolidone, ethylene imine. Gums, like guar gum, are suitable as well.
• polymers of ethylene oxide, acryl amide, or acrylic acid are preferred.
• the polymers should be fairly long chain, i.e., have a weight average molecular weight of at least 100,000.
• weight average molecular weight of the polymers should not exceed 10 million.
• the organic humectant optionally employed in the clay agglomerates herein may be any of the various water soluble materials utilized for such a purpose.
• the organic humectant is preferably selected from the group consisting of a) aliphatic hydrocarbon polyols having from 2 to 9 carbon atoms; b) ether alcohols derived from the polyols of a) ; c) ester alcohols derived from the polyols of a) ; d) mono- and oligosaccharides; and mixtures thereof.
• Highly preferred humectants include glycerol, ethylene glycol, propylene glycol and the dimers and trimers of glycerol, of ethylene glycol and of propylene glycol.
• the clay softening system can comprise from 0.5% to 30%, preferably from 2% to 15%, of the humectant by weight of the clay.
• a wide range of surfactants can be used in the detergent compositions.
• anionic surfactants are particularly suitable herein, especially mixtures of sulphonate and sulphate surfactants in a weight ratio of from 5:1 to 1:2, preferably from 3:1 to 2:3, more preferably from 3:1 to 1:1.
• Preferred sulphonates include alkyl benzene sulphonates having from 9 to 15, especially 11 to 13 carbon atoms in the alkyl radical, and alpha-sulphonated methyl fatty acid esters in which the fatty acid is derived from a C12-C18 fatty source preferably from a C ⁇ g-C ⁇ g fatty source.
• the cation is an alkali metal, preferably sodium.
• Preferred sulphate surfactants are alkyl sulphates having from 12 to 18 carbon atoms in the alkyl radical, optionally in admixture with ethoxy sulphates having from 10 to 20, preferably 10 to 16 carbon atoms in the alkyl radical and an average degree of ethoxylation of 1 to 6.
• alkyl sulphates herein are tallow alkyl sulphate, coconut alkyl sulphate, and C1 -.15 alkyl sulphates.
• the cation in each instance is again an alkali metal cation, preferably sodium.
• One class of nonionic surfactants useful in the present invention are condensates of ethylene oxide with a hydrophobic moiety to provide a surfactant having an average hydrophilic-lipophilic balance (HLB) in the range from 8 to 17, preferably from 9.5 to 13.5, more preferably from 10 to 12.5.
• HLB hydrophilic-lipophilic balance
• the hydrophobic (lipophilic) moiety may be aliphatic or aromatic in nature and the length of the polyoxyethylene group which is condensed with any particular hydrophobic group can be readily adjusted to yield a water-soluble compound having the desired degree of balance between hydrophilic and hydrophobic elements.
• Especially preferred nonionic surfactants of this type are the C9-C15 primary alcohol ethoxylates containing 3-8 moles of ethylene oxide per mole of alcohol, particularly the C1 - C15 primary alcohols containing 6-8 moles of ethylene oxide per mole of alcohol and the C]_2 -c 14 primary alcohols containing 3-5 moles of ethylene oxide per mole of alcohol.
• Another class of nonionic surfactants comprises alkyl polyglucoside compounds of general formula
• Z is a moiety derived from glucose; R is a saturated hydrophobic alkyl group that contains from 12 to 18 carbon atoms; t is from 0 to 10 and n is 2 or 3; x is from 1.3 to 4, the compounds including less than 10% unreacted fatty alcohol and less than 50% short chain alkyl polyglucosides.
• Compounds of this type and their use in detergent are disclosed in EP-B 0 070 077, 0 075 996 and 0 094 118.
• nonionic surfactants are poly hydroxy fatty acid amide surfactants of the formula
• R 1 wherein R 1 is H, or R- is C ⁇ _4 hydrocarbyl, 2-hydroxy ethyl, 2-hydroxy propyl or a mixture thereof, R 2 is C5.-31 hydrocarbyl, and Z is a polyhydroxyhydrocarbyl having a linear hydrocarbyl chain with at least 3 hydroxyls directly connected to the chain, or an alkoxylated derivative thereof.
• R! is methyl
• R 2 is a straight Cn_i5 alkyl or alkenyl chain such as coconut alkyl or mixtures thereof
• Z is derived from a reducing sugar such as glucose, fructose, maltose, lactose, in a reductive amination reaction.
• Suitable cationic surfactants include the water-soluble quaternary ammonium compounds useful in the present composition having the formula :
• R is Cg-Ci6 alkyl
• each of R2, R3 and R4 is independently C1-C4 alkyl, C1-C4 hydroxy alkyl, benzyl, and -(C2H4o) ⁇ H where x has a value from 2 to 5, and X is an anion.
• Not more than one of 2 R3 or R4 should be benzyl.
• the preferred alkyl chain length for R ⁇ is Ci2 ⁇ c l5 particularly where the alkyl group is a mixture of chain lengths derived from coconut or palm kernel fat or is derived synthetically by olefin build up or 0X0 alcohols synthesis.
• R2R3 and R4 are methyl and hydroxyethyl groups and the anion X may be selected from halide, methosulphate, acetate and phosphate ions.
• suitable quaternary ammonium compounds for use herein are coconut trimethyl ammonium bromide, coconut methyl dihydroxyethyl ammonium bromide, decyl triethyl ammonium chloride or bromide, decyl dimethyl hydroxyethyl ammonium chloride, myristyl trimethyl ammonium methyl sulphate, lauryl dimethyl benzyl ammonium bromide, lauryl methyl (ethenoxy) 4 ammonium bromide.
• the water-soluble cationic component of the compositions of the present invention is capable of existing in cationic form in a 0.1% aqueous solution at pH 10.
• the water-soluble cationic compounds will normally be present in an amount of from 0.2% to 10% by weight of the detergent composition.
• the compositions according to the present invention may further comprise a builder system. Any conventional builder system is suitable for use herein including aluminosilicate materials, silicates, polycarboxylates and fatty acids, materials such as ethylenediamine tetraacetate, metal ion sequestrants such as aminopoly-phosphonates, particularly ethylenediamine tetramethylene phosphonic acid and diethylene triamine pentamethylene-phosphonic acid. Though less preferred for obvious environmental reasons, phosphate builders can also be used herein.
• Suitable builders can be an inorganic ion exchange material, commonly an inorganic hydrated aluminosilicate material, more particularly a hydrated synthetic zeolite such as hydrated zeolite A, X, B or HS.
• SKS-6 is a crystalline layered silicate consisting of sodium silicate (Na2Si2 ⁇ 5) .
• Suitable polycarboxylates builders for use herein include citric acid, preferably in the form of a water-soluble salt, derivatives of succinic acid of the formula R- CH(COOH)CH2(COOH) wherein R is C10-20 alkyl or alkenyl, preferably C12-16, or wherein R can be substituted with hydroxyl, sulfo sulfoxyl or sulfone substituents.
• Specific examples include lauryl succinate , myristyl succinate, palmityl succinate2-dodecenylsuccinate, 2-tetradecenyl succinate.
• Succinate builders are preferably used in the form of their water-soluble salts, including sodium, potassium, ammonium and alkanolammonium salts.
• polycarboxylates are oxodisuccinates and mixtures of tartrate monosuccinic and tartrate disuccinic acid such as described in US 4,663,071.
• suitable fatty acid builders for use herein are saturated or unsaturated C10-18 fatty acids, as well as the corresponding soaps.
• Preferred saturated species have from 12 to 16 carbon atoms in the alkyl chain.
• the preferred unsaturated fatty acid is oleic acid.
• Preferred builder systems for use in granular compositions include a mixture of a water-insoluble aluminosilicate builder such as zeolite A, and a watersoluble carboxylate chelating agent such as citric acid.
• compositions according to the present invention may further comprise a bleach agent.
• any particulate inorganic perhydrate bleach can be used, in an amount of from 3% to 40% by weight, more preferably from 8% to 25% by weight and most preferably from 12% to 20% by weight of the compositions.
• Preferred examples of such bleaches are sodium perborate monohydrage and tetrahydrate, percarbonate, and mixtures thereof.
• Another preferred separately mixed ingredient is a peroxy carboxylic acid bleach percursor, commonly referred to as a bleach activator, which is preferably added in a prilled or agglomerated form in granular detergents.
• a bleach activator a peroxy carboxylic acid bleach percursor
• suitable compounds of this type are disclosed in British Patent Nos. 1586769 and 2143231 and a method for their formation into a prilled form is described in European Published Patent Application No. 0 062 523.
• Preferred examples of such compounds are tetracetyl ethylene diamine and sodium 3, 5, 5 trimethyl hexanoyloxybenzene sulphonate.
• Bleach activators are normally employed at levels of from 0.5% to 10% by weight, more frequently from 1% to 8% and preferably from 2% to 6% by weight of the composition. Enzymes such as proteases, lipases, cellulase or amylases are particularly desirable ingredients of the compositions herein.
• Antiredeposition and soil suspension agents suitable herein include cellulose derivatives such as methyl-cellulose, carboxymethylcellulose and hydroxyethyl-cellulose, homo- or copolymeric polycarboxylic acids or their salts and polyamino compound.
• Polymers of this type include the polyacrylates and maleic anhydride-acrylic acid copolymers disclosed in detail in EPA 137 669, as well as copolymers of maleic anhydride with ethylene, methylvinyl ether or methacrylic acid, the maleic anhydride constituting at least 20 mole percent of the copolymer.
• Polyamino compound such as those derived from aspartic acid are disclosed in EPA 305 282, EPA 305 283, and EPA 351 629.
• Preferred optical brighteners are anionic in character, examples of which are disodium 4, ⁇ -bis-(2-diethanolamino-4- anilino -s- triazin-6-ylamino) stilbene-2:2 disulphonate, disodium 4, - 4 ⁇ -bis- (2-morpholino-4-anilino-s-triazin-6- ylaminostilbene-2:2 1 - disulphonate, disodium 4,4!- bis- (2,4- dianilino-s-triazin-6-ylamino)stilbene-2:2 ⁇ -disulphonate, monosodium 4 1 , 4 1 -bis- (2,4-dianilino-s-triazin-6 ylamino)stilbene 2-sulphonate, disodium 4,4 ⁇ -bis-(2-anilino- 4-(N-methyl-N-2-hydroxethylamino)-s-triazin-6- ylamino) stilbene-2,2 1
• a suds suppressor exemplified by silicones, and silica-silicone mixtures.
• Silicones can be generally represented by alkylated polysiloxane materials while silica is normally used in finely divided forms exemplified by silica aerogels and xerogels and hydrophobic silicas of various types. These materials can be incorporated as particulates in which the suds suppressor is advantageously releasably incorporated in a water-soluble or water-dispersible, substantially non- surface-active detergent impermeable carrier.
• the suds suppressor can be dissolved or dispersed in a liquid carrier and applied by spraying on to one or more of the other components.
• useful silicone suds controlling agents can comprise a mixture of an alkylated siloxane, of the type referred to hereinbefore, and solid silica. Such mixtures are prepared by affixing the silicone to the surface of the solid silica.
• a preferred silicone suds controlling agent is represented by a hydrophobic silanated (most preferably trimethyl-silanated) silica having a particle size in the range from 10 millimicrons to 20 millimicrons and a specific surface area above 50 m ⁇ /g intimately admixed with dimethyl silicone fluid having a molecular weight in the range from about 500 to about 200 000 at a weight ratio of silicone to silanated silica of from about 1:1 to about 1:2.
• a preferred silicone suds controlling agent is disclosed in Bartollota et al. U.S. Patent 3 933 672.
• Other particularly useful suds suppressors are the self-emulsifying silicone suds suppressors, described in German Patent Application DTOS 2 646 126 published April 28, 1977.
• An example of such a compound is DC-544, commercially available from Dow Corning, which is a siloxane-glycol copolymer.
• the suds suppressors described above are normally employed at levels of from 0.001% to 2% by weight of the composition, preferably from 0.01% to 1% by weight.
• the incorporation of the suds modifiers is preferably made as separate particulates, and this permits the inclusion therein of other suds controlling materials such as C20-C24 fatty acids, microcrystalline waxes and high MW copolymers of ethylene oxide and propylene oxide which would otherwise adversely affect the dispersibility of the matrix. Techniques for forming such suds modifying particulates are disclosed in the previously mentioned Bartolotta et al U.S. Patent No. 3 933 672.
• Suitable water-soluble organic salts are the homo- or co-polymeric acids or their salts, in which the polycarboxylic acid comprises at least two carboxyl radicals separated from each other by not more than two carbon atoms.
• Polymers of this type are disclosed in GB-A-1,596,756.
• Examples of such salts are polyacrylates of MW 2000-5000 and their copolymers with maleic anhydride, such copolymers having a molecular weight of from 20,000 to 70,000, especially about 40,000.
• Detergency builder salts are normally included in amounts of from 10% to 80% by weight of the composition preferably from 20% to 70% and most usually from 30% to 60% by weight.
• detergent compositions may be employed, such as suds boosting and stabilizers or activators therefore, soil-suspending agents, soil-release agents, pigments, photo-bleach activators, abrasives, bactericides, tarnish inhibitors and coloring agents.
• the detergent compositions according to the invention can be in liquid, paste or granular forms.
• Granular compositions according to the present invention can also be in "compact form", i.e. they may have a relatively higher density than conventional granular detergents, i.e. from 550 to 950 g/1; in such case, the granular detergent compositions according to the present invention will contain a lower amount of "inorganic filler salt", compared to conventional granular detergents; typical filler salts are alkaline earth metal salts of sulphates and chlorides, typically sodium sulphate; "compact" detergents typically comprise not more than 10% filler salt.
• the liquid compositions according to the present invention can also be in "compact form", in such case, the liquid detergent compositions according to the present invention will contain a lower amount of water,compared to conventional liquid detergents.
• the process comprises contacting fabrics with a laundering solution as hereinbefore described.
• the process and compositions of the invention can also be used as additive during laundry operations.
• a compact granular detergent composition according to the present invention is prepared, having the following formulation: % by weight of the total detergent composition
• Suds suppressor agglomerate comprising 11% by weight of the component of polydimethylsiloxane, 14% TAE80 , 5% of C12-C22 hydrogenated fatty acids and 70% starch.
• the soil release polymer in Examples A to E is a modified polyester being a random copolymer of dimethyl terephtalate, dimethyl sulfoisophtalate, ethylene glycol and 1,2 propane diol, the end groups consisting primarily of sulphobenzoate and secondarily of monoesters of ethylene glycol and/or propane diol.
• a perfume encapsulate having the following composition was made :

Landscapes

• Detergent Compositions (AREA)

Priority Applications (1)

Applications Claiming Priority (6)

Publications (2)

Family

ID=27235600

Family Applications (1)

Country Status (1)

Citations (5)

Family Cites Families (5)

• 1994
  • 1994-02-10 EP EP94910182A patent/EP0686190A4/de not_active Ceased

Patent Citations (6)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events