WO2023057437A1 - Composition de lessive - Google Patents

Composition de lessive Download PDF

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Publication number
WO2023057437A1
WO2023057437A1 PCT/EP2022/077551 EP2022077551W WO2023057437A1 WO 2023057437 A1 WO2023057437 A1 WO 2023057437A1 EP 2022077551 W EP2022077551 W EP 2022077551W WO 2023057437 A1 WO2023057437 A1 WO 2023057437A1
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WO
WIPO (PCT)
Prior art keywords
las
composition
feedstock
alkyl
composition according
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PCT/EP2022/077551
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English (en)
Inventor
Venkataraghavan Rajanarayana
Apeksha Ramesh
Original Assignee
Unilever Ip Holdings B.V.
Unilever Global Ip Limited
Conopco, Inc., D/B/A Unilever
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Application filed by Unilever Ip Holdings B.V., Unilever Global Ip Limited, Conopco, Inc., D/B/A Unilever filed Critical Unilever Ip Holdings B.V.
Publication of WO2023057437A1 publication Critical patent/WO2023057437A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/04—Detergent materials or soaps characterised by their shape or physical properties combined with or containing other objects
    • C11D17/041—Compositions releasably affixed on a substrate or incorporated into a dispensing means
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02—Anionic compounds
    • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/22—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aromatic compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0047—Detergents in the form of bars or tablets
    • C11D17/0065—Solid detergents containing builders
    • C11D17/0073—Tablets
    • C11D17/0086—Laundry tablets

Definitions

  • the present invention relates to solid laundry detergent composition.
  • a solid laundry composition in the form of a unit-dose composition having improved surfactant.
  • Solid unit dose laundry compositions are known.
  • Unit dose compositions such as detergent tablets, water-soluble unit dose pouch enclosing a laundry composition are one of the most preferred consumer products due to ease of handling, dosage and storage.
  • Such compositions are used to clean surfaces, such as bathroom, kitchen surfaces as well as to clean laundry surfaces.
  • Surfactants are the main cleaning ingredient present in a unit dose laundry composition. Synthetic surfactant currently used are predominantly petroleum derived.
  • linear alkyl benzene sulphonate (LAS) surfactant The synthesis of the linear alkyl benzene sulphonate (LAS) surfactant is described in Anionic Surfactants: Organic Chemistry (Surfactant Science Series Vol 56 edited by H. Stache), Marcel Dekker 1995. The chemistry involves production of linear C10/13 olefins which are reacted with benzene to form linear alkyl benzene (LAB) and then sulphonated to give LAS.
  • LAB linear alkyl benzene
  • the olefins can be obtained from CO via Fischer Tropsch synthesis, but today are derived from petroleum.
  • LAS produced currently is a complex mix of compounds with varying alkyl chain length and isomers.
  • the properties of LAS are determined by the composition of the mixture. This is particularly key when used in laundry composition, as small changes in structure may influence the processing of the laundry composition such as the spraydrying process used for preparing a spray-dried detergent particle for unit-dose laundry composition and also the stability of the unit-dose laundry composition specifically those enclosed within a water-soluble pouch.
  • Plastic waste is a key issue. Many plastics cannot be recycled by mechanical means, an alternative is chemical recycling. In chemical recycling the plastic is pyrolyzed to produce pyrolysis oil which is a complex mixture of aromatics, alkanes, cycloalkanes, alkenes, cycloalkenes and oxygenates.
  • pyrolysis oil is a complex mixture of aromatics, alkanes, cycloalkanes, alkenes, cycloalkenes and oxygenates.
  • An illustration of a typical product mix from pyrolysis oil is described in “Chemical recycling of plastic waste: Bitumen, solvents and polystyrene from pyrolysis oil” in l/l/aste Management 118 (2020) 139-147 by Baene-Gonzalez et al.
  • Agricultural and waste products such as oils, plant shells and husks may also be used to make pyrolysis oil.
  • pyrolysis oil Once produced pyrolysis oil may be distilled to give the necessary raw materials to make LAS. It is desired to provide LAS from the plastic waste feedstock which is similar to the current LAS obtained from the petroleum feedstock.
  • WO 2017/027271 discloses methods for producing detergent compounds from waste plastic feedstocks. More specifically, the invention relates to methods for producing detergent intermediates, including alkylbenzenes, paraffins, olefins, oxo alcohols, and surfactant derivatives thereof from waste plastic feedstock.
  • W02020/178597 (Oxford Sustainable Fuels Ltd) discloses a process for upgrading a pyrolysis oil derived from plastic or rubber.
  • the amount of pyrolysis-based LAS is such that it compensates for the plastic packing used to transport the liquid detergent, by a factor of greater than 1 , more preferably great than 10, most preferably greater than 100 times.
  • Linear alkyl benzene (LAB) is typically manufactured using petroleum feedstock on a large scale by the petroleum industry.
  • LAB is sulphonated with sulfuric and/or sulfonic acid and converted to LAS by smaller industrial plants before being incorporated as LAS acid in detergent compositions.
  • the LAS acid is neutralized by a counterion such as alkali metal salts or ammoniacal salts to form corresponding alkaline salt of LAS.
  • LAS The key to LAS’s success in detergent composition is that it is a varied mixture of components. Variety resides in the number of carbon atoms in the alkyl chain as well as the point in the alkyl chain that the alkyl chain is linked to the benzene ring. There also exist isomers of LAS for example the 2-phenyl isomer which appears relevant to the overall performance of LAS in use.
  • the variety of materials present in a LAS batch also figures in the supply chain.
  • the LAS, (or more correctly LAB) produced is influenced by the feedstock. Different petroleum feedstocks will produce different LAB mixtures. In the consumer products industry this is managed with reference to a specification which covers a range of LAB characteristics. The specification is designed to ensure that no matter the actual nature of any one sample, that it is able to function as required in a detergent formulation.
  • a detergent composition Functioning in a detergent composition, in particular a solid unit-dose laundry composition is also important, not just for the detergency benefit provided by the LAS but the influence on the performance of other components in the solid laundry detergent composition.
  • LAS obtained from waste plastic feedstock can be incorporated without any undue effect on the performance of a solid unit-dose laundry composition. It was also found that the LAS obtained from waste plastic feedstock has a higher wetting ability as compared to the petroleum derived feedstock which provides the LAS obtained from waste plastic feedstock with better ability to remove stains and has better cleaning performance. It was also surprisingly observed that a combination of LAS obtained from petroleum feedstock and linear alkyl benzene sulphonate (LAS) obtained from waste plastic feedstock provides for desired foam profile. Hence, the solid composition having both LAS obtained from waste plastic feedstock and LAS obtained from petroleum feedstock provides the benefit of reducing the amount of the LAS obtained from petroleum feedstock while maintaining good cleaning performance and sensorial properties (foaming profile).
  • the composition remains storage stable, and the performance of the various components present in the solid laundry composition is maintained preferably when the amount of waste plastic feedstock-based LAS described herein are provided within certain levels.
  • a solid laundry unitdose composition comprising linear alkyl benzene sulphonate (LAS) obtained from petroleum feedstock and linear alkyl benzene sulphonate (LAS) obtained from waste plastic feedstock.
  • LAS linear alkyl benzene sulphonate
  • a method of preparing a solid unit dose laundry composition comprising the steps of: i) obtaining a LAS surfactant from a plastic waste feedstock, preferably from a pyrolysis oil prepared from the waste plastic feedstock; and, ii) incorporating the LAS surfactant obtained from a plastic waste feedstock and LAS obtained from petroleum feedstock into a solid laundry unit-dose composition.
  • a LAS obtained from a plastic waste feedstock in a solid laundry unit-dose composition for lowering the amount of the components present in the laundry composition derived from a petroleum feedstock as compared to a traditional laundry composition.
  • Yet another aspect of the present invention is a use of LAS obtained from a plastic waste feedstock in a solid laundry unit-dose composition for providing improved biodegradability.
  • Yet another aspect of the present invention is a use LAS obtained from a plastic waste feedstock and LAS obtained from petroleum feedstock in a solid laundry unit-dose composition for providing for providing excellent detersive properties. Such improved detersive properties may result in improved removal of hydrophobic soils from clothing.
  • a laundry unit-dose composition including linear alkyl benzene sulphonate (LAS) obtained from waste plastic feedstock and LAS obtained from petroleum feedstock.
  • LAS linear alkyl benzene sulphonate
  • the LAS from the pyrolysis of waste plastic feedstock is made via an alkylation reaction of benzene with an n-olefin, then sulphonation.
  • alkyl chains obtained from the pyrolysis oil and used to make the LAS has a distillation range of 174°C to 220°C.
  • the weight ratio of (A):(B) is from 2:1 to 1 :2, more preferably from 3:2 to 1:2, most preferably 5:4 to 4:5 in the LAS obtained from plastic waste feedstock.
  • these two isomers represent from 20 wt.% to 70 wt.% of the LAS obtained from plastic waste feedstock, more preferably from 30 wt.% to 40 wt.%.
  • the LAS obtained from waste plastic feedstock includes at least 15 wt.% 2-phenyl isomer, more preferably at least 20 wt.%. Still preferably 2-phenyl isomer is present in an amount ranging from 1 wt.% to 30 wt.% by weight of the LAS obtained from waste plastic feedstock.
  • the Na counterion may also be replaced by any other counterion known to a person skilled in the art.
  • non-benzene aromatics-based side products may be produced, for example addition of the alkyl chain to styrene or addition of styrene to benzene.
  • Toluene based products are another example.
  • LAS adducts with non-benzene aromatics are less than 2 wt.% of the LAS obtainable from waste-plastic feedstock, pyrolysis LAS.
  • LAS adducts with styrene are less than 1 wt.% of the LAS obtainable from waste-plastic feedstock, the pyrolysis LAS.
  • Styrene monomers may be removed from pyrolysis oil by for example distillation or polymerization and extraction.
  • the benzene required for LAS synthesis is obtained from pyrolysis oil obtained from the waste plastic feedstock and the alkyl chain of LAS is obtained from a biobased source, preferably plant source.
  • the alkyl chain can be obtained from plant oils by metathesis reactions as described in Angewandte Chemie International Edition; 51 (2012), 24. - S. 5802-5808 by Samir Chikkali and Stefan Mecking.
  • the feedstock for the metathesis reaction of the invention includes but is not limited to fatty acids, fatty esters, fats, oils for the formation of mixtures of C10 to C14 alkenes.
  • the fatty acid, fatty ester, fat, and/or oil has an iodine value of at least about 15, preferably at least about 50, more preferably at least about 180.
  • the iodine value which can be determined using the AOAC Official Method of Analysis (1984), Chapter 28.023, is the mass of iodine in grams that is consumed by 100 grams of a chemical substance (see, e.g., Pocklington, Pure & Appl. Chem. 62(12):2339-2343 (1990)).
  • the fatty acid, fatty ester, fat, and/or oil comprises at least about 10 wt.%, preferably at least about 20 wt.% of fatty acids, fatty esters, fats, and/oils that have at least 10 carbon atoms, based on the total weight of the fatty acids, fatty esters, fats, and/or oils.
  • the alkyl group on the linear alkylbenzene sulfonates each independently have a total of 10, 11 , 12, 13, or 14 carbon atoms.
  • the LAS obtained from waste plastic feedstock comprises alkyl chains with an average chain length from 8 to 14 carbons, 10 to 14, more preferably from 10 to 13 and most preferably from 11 to 12.
  • at least 30 wt.% of the LAS obtained from waste plastic feedstock comprises alkyl chains with 12 carbons.
  • at least 30 wt.% of the LAS obtained from waste plastic feedstock comprises alkyl chains with 11 carbons.
  • Preferably less than 5 wt.% of linear alkylbenzene sulfonates obtained from the plastic waste feedstock have alkyl groups with 9 or fewer carbon atoms and alkyl groups that have 15 or more carbon atoms.
  • the alkyl chain comprises a mixture of chain lengths but has an average of from 8 to 16, more preferably from 10 to 14 and most preferably from 11 to 12. Alkyl chain length with an average from 11.5 to 11.7 is a particularly preferred range.
  • the LAS contains more than 80 wt% of the C10, C11, C12 and C13 alkyl chains.
  • the weight ratio of C10:C11 is from 1 :2 to 1 :5.
  • the weight ratio of C10:C12 is from 1:2 to 1 :5.
  • the weight ratio of C10:C13 is from 1 :1 to 1 :3.
  • the alkyl chain can be attached to any position on the benzene ring.
  • the sulphonate group includes a cation M which may be hydrogen or a metal ion, such as an alkali metal (e.g., sodium, lithium, potassium), an alkaline earth metal (e.g., calcium, magnesium), or the like.
  • the alkyl group on the linear alkylbenzene sulfonates may include a biobased content, preferably plant source, of at least about 5%, at least about 10%, at least about 20%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, at least about 90%, at least about 95%, for example about 100%.
  • the solid unit dose laundry composition comprises from 1 wt.% to 40 wt.% LAS, more preferably from 2 to 20% wt. LAS.
  • the solid unit dose laundry composition comprises at least 4 wt.%, still preferably at least 5 wt.%, still preferably at least 10 wt.%, most preferably at least 15 wt.% of LAS, but typically not more than 45 wt.%, still preferably not more than 40 wt.%, still further preferably not more than 35 wt.%, still more preferably not more than 30 wt.% and most preferably not more than 25 wt.%, still more preferably not more than 20 wt.% of LAS based on the weight of the solid unit dose laundry composition.
  • the LAS obtained from waste plastic feedstock comprises from 0.001 wt.% to 8 wt.%, preferably from 1 wt.% to 8 wt.% of the total LAS present in the composition.
  • the remaining LAS is from petroleum feedstock or preferably selected from a combination of petroleum and/or other sources, preferably petroleum feedstock.
  • Solid unit dose laundry composition having these levels of LAS obtained from waste plastic feedstock maintain similar processing conditions and performance as traditional composition, whereas moving beyond these levels, a change in the processing or formulation of composition may be required.
  • the LAS includes an alkyl component obtained from a renewable source, more preferably from a plant, algae or yeast.
  • the level of tetralins is less than 8 wt.%, more preferably less than 0.5 wt.%, still preferably less than 0.1 wt.% in the laundry composition.
  • the level of isoalkylbenzenes is less than 6 wt.% more preferably less than 1 wt.% in the laundry composition.
  • the 2-phenyl isomer content is at least 10 wt%. of the total LAS, more preferably at least 15 wt.% and most preferably at least 20 wt.% wt. of the total LAS present in the composition.
  • the LAS obtained from waste plastic feedstock comprises a benzene moiety obtained from waste plastic feedstock and an olefin group obtained from a petroleum feedstock.
  • the LAS obtained from waste plastic feedstock comprises a benzene moiety obtained from waste plastic feedstock and an alkyl group obtained from a plant-based feedstock.
  • the LAS obtained from waste plastic feedstock comprises a benzene moiety obtained from waste plastic feedstock and an alkyl group obtained from waste plastic feedstock.
  • the solid laundry unit-dose detergent composition includes a LAS obtained from petroleum feedstock.
  • the LAS obtained from petroleum feedstock is well known to a person skilled in the art and is used in the traditional solid unit-dose laundry detergent composition.
  • LAS obtained from petroleum feedstock it is meant that the LAS is obtained directly from the petroleum supply chain and relates to the industry standard LAS. This excludes LAS which is processed from waste-plastic which involves extracting material from waste products, processing them to form the materials which are fed back into the feedstock to produce LAS. It is acknowledged that literally, waste-plastic feedstock is also ultimately derived from the petroleum supply chain, but has an extra stage in its processing relating its constituent parts being used in different raw materials in a different context, e.g. as packaging materials. It is this extra stage which distinguishes it from what a LAS obtained from petroleum feedstock.
  • LAB is the material commercially handles whereas the sulphonation step to turn LAB into LAS occurs at the end is often carried out by the end user. Further, in liquid formulations the LAS is neutralised in situ and the weight proportions described herein refer to the protonated form.
  • Examples of commercially available LAS obtained from petroleum feedstock includes those from Galaxy surfactants.
  • the alkyl group on the LAS obtained from petroleum feedstock may each independently have a total of 10, 11 , 12, 13, or 14 carbon atoms.
  • the LAS obtained from petroleum feedstock feedstock comprises alkyl chains with an average chain length from 8 to 14 carbons, more preferably from 10 to 13 and most preferably from 11 to 12.
  • at least 30 wt.% of the LAS obtained from petroleum feedstock comprises alkyl chains with 12 carbons.
  • at least 30 wt.% of the LAS obtained from petroleum feedstock comprises alkyl chains with 11 carbons.
  • Preferably less than 5 wt.% of linear alkylbenzene sulfonates obtained from the petroleum feedstock have alkyl groups with 9 or fewer carbon atoms and alkyl groups that have 15 or more carbon atoms.
  • the alkyl chain comprises a mixture of chain lengths but has an average of from 8 to 16, more preferably from 10 to 14 and most preferably from 11 to 12. Alkyl chain length with an average from 11.5 to 11.7 is a particularly preferred range.
  • the LAS contains more than 80 wt% of the C10, Cn, C12 and C13 alkyl chains.
  • the weight ratio of Cio:Cn is from 1 :2 to 1 :5.
  • the weight ratio of Cio:Ci2 is from 1 :2 to 1 :5.
  • the weight ratio of Cio:Ci3 is from 1 : 1 to 1 :3.
  • the alkyl chain can be attached to any position on the benzene ring.
  • the sulphonate group includes a cation M which may be hydrogen or a metal ion, such as an alkali metal (e.g., sodium, lithium, potassium), an alkaline earth metal (e.g., calcium, magnesium), or the like.
  • linear indicates that the alkyl portions thereof contain less than 30%, preferably less than 20%, more preferably less than 10% branched alkyl chains.
  • LAB and the corresponding LAS obtained from petroleum feedstock contains a distribution of isomers in which the benzene moiety is attached in various positions on the hydrophobic alkyl chain. It is the hydrophobic portion of LAS which attaches to soil.
  • a typical LAB obtained from petroleum feedstock used to form LAS contains a distribution of various LAB isomers, such as 2-phenyl LAB, 3-phenyl LAB, 4-phenyl LAB, etc.
  • the weight ratio of structure with formula (A): formula (B) as given above is from 2:1 to 1 :2, more preferably from 3:2 to 1:2, most preferably 5:4 to 4:5 in the LAS obtained from petroleum feedstock.
  • these two isomers represent from 20 wt.% to 70 wt.% of the LAS obtained from petroleum feedstock, more preferably from 30 wt.% to 40 wt.%.
  • 2-phenyl isomer is present in an amount ranging from 1 wt.% to 30 wt.% by weight of the LAS obtained from petroleum.
  • the Na counterion may also be replaced by any other counterion known to a person skilled in the art.
  • Solid laundry unit-dose composition :
  • a solid laundry composition according to the present disclosure encompasses a variety of unit dose composition which may include cast and extruded forms including, for example, solids, pellets, blocks, bars, and tablets, particulate or powder composition enclosed within a water soluble pouch, detergent contained on or in a porous substrate or nonwoven sheet, and other suitable forms that may be apparent to one skilled in the art in view of the teachings herein.
  • solid refers to the state of the detergent composition under the expected conditions of storage and use of the solid detergent composition. In general, it is expected that the detergent composition will remain a solid when provided at a temperature of up to about 37°C and preferably greater than 50°C.
  • the composition according to the present invention preferably has a pH from 7.0 to 13, preferably 7.0 to 10.5, still preferably 7.0 to 10.2, still further preferably from 8.5 to 10.2, when measured at 1 wt.% dilution in de-ionised water at 25°C.
  • the composition may preferably include a buffer.
  • the unit dose composition according to the present invention may be made via a variety of conventional methods known in the art and includes but is not limited to the mixing of ingredients, including dry-mixing, followed by compaction such as agglomerating, extrusion, tabletting.
  • the unit dose composition enclosed within a water soluble pouch may be in the particulate or powder form and where such detergent composition may be made by any of the conventional processes, especially preferred is the technique of slurry making and spray drying or the non-tower route.
  • a preferred unit dose composition includes an extruded laundry composition which includes an amount of laundry composition which is sufficient for one laundry wash.
  • Another preferred unit dose laundry composition includes a tablet.
  • the tablet is preferably formed using known tableting process known to a person skilled in the art.
  • the tablet may be formulated using a single composition.
  • specific region of the tablet may have different composition.
  • the tablet may preferably be coated and have a core with a different composition and a coating with a different composition.
  • Preferably the entire tablet may dissolve at the same time.
  • specific region of the tablet may dissolve at different stages of the wash cycle.
  • the tablet may dissolve sequentially triggered by specific external response which included but is not limited to temperature, pressure or pH of the wash liquor. On the other hand, the sequential release may be determined by the varying levels of disintegration ingredient present in different regions.
  • Non-limiting examples of the disintegrant includes those selected from swellable agent, preferably a polymer material.
  • swellable agent preferably a polymer material.
  • Non-limiting examples includes starch, cellulose and derivatives thereof, alginates, sugars, polysaccharides, polyvinylpyrrolidones, swellable clays and mixtures thereof.
  • Water-swellable polymer material include for example, synthetic polymers such as polyvinylpyrrolidone (PVP) or natural polymers and/or modified natural substances such as polysaccharides, cellulose, microcrystalline cellulose, starch and their derivatives or alginates or casein derivatives.
  • PVP polyvinylpyrrolidone
  • the disintegrant integrant is an effervescent disintegrant agent which are substances that can create a pressure through the release of gases
  • effervescent agent as used herein includes ingredient which release gas in-situ.
  • Preferred effervescent systems consist of at least two components which react with one another to form a gas in-situ.
  • the components of the effervescent system include an alkali salt component which reacts with an acidifying agent to release carbon dioxide in-situ.
  • the alkaline salt component include alkali metal carbonate and/or bicarbonate.
  • an acidifying agent which releases carbon dioxide from a reaction with the alkali salts in aqueous solution is citric acid.
  • the acidifying agent used as a component of the effervescent disintegrant agent include weak acids, for example, polycarboxylic acids, citric acid (preferred), malic acid, maleic acid, malonic acid, itaconic acid, oxalic acid, glutaric acid, glutamic acid, lactic acid, fumaric acid, glycolic acid, tartaric acid and mixtures thereof.
  • Suitable acids include mono, di, or tri basic acids having pKa in the range of 1 to 6.9.
  • acids include amino sulphonic acids, organo phosphonic acids, HEDP acid, polycarboxylic acids or mixtures thereof.
  • the unit-dose laundry composition may be preferably packaged in a unit dose pouch.
  • the unit dose pouch is preferably made of a water-soluble film material, such as a polyvinyl alcohol.
  • the unit dose pouch includes a single or multicompartment pouch enclosing a laundry composition.
  • the laundry composition may be a solid laundry composition, or at least one compartment may hold a solid laundry composition. Examples of suitable pouches and water-soluble film materials are provided in U.S. Patent Nos. 6,881 ,713, 6,815,410., and 7,125,828.
  • the laundry unit-dose composition may be in the form of an article where the article may comprise a solid laundry composition as described herein and a substrate, wherein the composition may be in contact with the substrate.
  • the substrate may be fully or partially in the form of a film.
  • the film may have a thickness ranging from 0.01 mm to 5.0 mm, or from 0.1 mm to 2.5 mm, or from 0.3 mm to 1.5 mm, more preferably from 0.5 mm to 1.0 mm.
  • composition is present in the article in the form of a layer having a thickness as measured from the surface of the composition in contact with the substrate to the outer surface of the composition ranging from 0.01 mm to 0.3 mm, or from 0.020 mm to 0.2 mm, or from 0.025 mm to 0.1 mm, more preferably from 0.03 mm to 0.05 mm.
  • the substrate may be selected from the group consisting of water-soluble substrates, water-insoluble substrates, water dispersible substrates, water disintegrating substrates, and combinations thereof.
  • Suitable water-soluble substrates include polyvinyl alcohol (PVA), polyvinyl pyrrolidone, cellulose, cellulose ethers, cellulose esters, polycarboxylic acids and salts, polyaminoacids or peptides, polyamides, polyacrylamide, copolymers of maleic/acrylic acids, polyvinyl alcohol copolymers, hydroxypropyl methyl cellulose (HPMC), or mixtures thereof.
  • PVA polyvinyl alcohol
  • HPMC hydroxypropyl methyl cellulose
  • the water-soluble substrate may comprise a water-soluble substrate selected from the group consisting of cold-water soluble substrates, hot-water soluble substrates, and mixtures thereof.
  • a water-insoluble substrate includes natural polymer in the form of woven or non-woven matrix selected from cellulose, chitosan, starch, seed hulls, derivatives thereof, and combinations thereof.
  • Non-limiting example of a dispersible substrate includes paper.
  • the unit-dose laundry composition is a water-soluble pouch having a compartment enclosing a solid laundry composition.
  • the solid laundry composition is prepared by a spray-drying process.
  • the spray-drying is carried out using any of the conventional spray drying system known in the art.
  • the aqueous slurry having LAS obtained from waste plastic feedstock and LAS obtained from petroleum feedstock is transferred through a pipe system to a pump system consisting of one or more pump and then further to a spray nozzle through which the slurry is released under pressure into a drying tower.
  • a typical spray-drying process involves the step of transferring the aqueous slurry through a pipe system leading to a first pump and then through a second pump and from a second pump to a plurality of spray nozzles.
  • the first pump is typically a low- pressure pump, such as a pump that can generate a pressure of from 1x10 5 NOT 2 to 1x10 6 Nm -2 , which ensures proper flooding of the second pump.
  • the second pump is a high-pressure pump, such as a pump that can generate a pressure ranging from 2x10 6 Nm -2 to 2x10 7 Nm -2 .
  • the aqueous slurry may be transferred through bolt catchers, magnetic filters, lump breakers, disintegrators such as the Ritz Mill, during the transfer of the aqueous slurry through the pipe system downstream the pump system or the mixer in which the aqueous slurry is formed.
  • the disintegrator is preferably positioned between the pumps.
  • the flow rate of the aqueous slurry along the pipes is typically in the range from 800 Kg/hour to more than 75,000 Kg/hour.
  • the spray drying system may include a deaeration system.
  • the deaeration system is preferably a vacuum assisted de-aerator, which is preferably fed by a transfer pump.
  • the deaeration system remove air bubbles formed during the slurry preparation, thus increasing the bulk density of the spray-dried powder.
  • De-aeration of the slurry may also be carried out by other mechanical means or chemical de-aeration means using antifoams or de-foamers.
  • air injection system may be provided along the pipe system.
  • the air injection system may be provided before or after the pump system.
  • the air injection includes air flow and pressure controls, static mixer, pulsation dampener and compressor set which can aerate the slurry to get a lower bulk density for the spray- dried powder.
  • the gas injected into the slurry may be nitrogen, carbon dioxide, or simply atmospheric air introduced under a pressure higher than the pressure of the aqueous slurry maintained in the pipe system.
  • a typical spray drying system can optionally include both the de-aeration system and air injection system to optimize the desired bulk density of the spray-dried powder.
  • Typical spray drying tower for detergent applications are counter-current spray drying tower.
  • the inlet hot air or hot steam temperature introduced into the spray drying tower is the range from 250°C to 500°C depending on the evaporation capacity and sizing of the tower.
  • the tower exhaust air temperature can range from 60°C to 200°C, more preferably 80°C to 200°C, still more preferably 80°C to 100°C depending on the loading of the tower.
  • the aqueous slurry introduced into the spray nozzle of the spray drying tower is preferably at a temperature ranging from 60°C to 95°C.
  • the spray drying tower may be a co-current spray drying tower, but they are less common.
  • the spray-dried powder existing the tower is maintained at a temperature less than 150°C, still preferably less than 100°C.
  • the spray-drying is preferably conducted in the spray drying zone under a negative pressure of at least 50 NOT 2 , still preferably the negative pressure is from 50 NOT 2 to 600 NOT 2 .
  • the vacuum conditions are achieved by controlling the speed setting of the dampener of either or both the inlet and the outlet air fan.
  • the spray-dried powder collected at the bottom of the tower may be subjected to cooling and conditioning by using an air lift or other similar process known to a person skilled in the art for cooling and conditioning spray-dried particle.
  • the spray-dried powder collected from the bottom of the spray-drying tower is preferably mixed with a flow aid chosen from zeolite or similar fine mineral particles selected from the group consisting of dolomite, calcite or mixtures thereof, just before being air-lifted.
  • the spray-dried powder is subject to particle size classification to remove oversize material (> 2 mm typically) to provide a spray dried detergent particle which is free flowing.
  • the fine material ⁇ 100 microns typically
  • compositions preferably have a density of more than 350 grams/litre, more preferably more than 450 grams/litre or even more than 570 grams/litre.
  • the solid laundry composition according to the present invention preferably has from 0 wt.% to 8 wt.% zeolite builder.
  • the amount of zeolite builder is less than 5 wt.%, still preferably less than 3 wt.%, more preferably less than 2 wt.% by weight in the detergent composition and most preferably the detergent composition is substantially free of zeolite builder.
  • the solid laundry detergent composition according to the present invention preferably has from 0 wt.% to 4 wt.% phosphate builder.
  • the amount of phosphate builder is less than 3 wt.%, still preferably less than 2 wt.%, more preferably less than 1 wt.% by weight in the detergent composition and most preferably the detergent composition is substantially free of phosphate builder.
  • substantially free means that the indicated component is at the very minimum, not deliberately added to the composition to form part of it, or, more typically, is not present at analytically detectable levels. It is meant to include compositions whereby the indicated material is present only as an impurity in one of the other materials deliberately included.
  • the solid unit-dose laundry composition may include one or more of the following ingredients selected from additional surfactant, polymers, enzymes, builder, sequestrant, optical brighteners, perfumes, bleach, bleach activators, antifoams, shading or hueing dyes, pH buffering agents, perfume carriers, hydrotropes, cleaning polymers, care polymers, anti-redeposition agents, soil-release agents, anti-shrinking agents, anti-wrinkle agents, dyes, colorants and visual cues.
  • additional surfactant selected from additional surfactant, polymers, enzymes, builder, sequestrant, optical brighteners, perfumes, bleach, bleach activators, antifoams, shading or hueing dyes, pH buffering agents, perfume carriers, hydrotropes, cleaning polymers, care polymers, anti-redeposition agents, soil-release agents, anti-shrinking agents, anti-wrinkle agents, dyes, colorants and visual cues.
  • additional surfactant selected from additional surfactant, polymers, enzymes, builder,
  • the additional surfactant includes anionic surfactant other than LAS, cationic surfactant, amphoteric surfactant, zwitterionic surfactant, further nonionic surfactant or combinations thereof.
  • Suitable anionic surfactants include those selected from the group consisting of alkyl sulfates, alkyl sulfonates, alkylaryl sulfonates, alkyl sulfosuccinates, alkyl ether sulfosuccinates, alkyl sulfosuccinamates, alkyl amidosulfosuccinates, alkyl carboxylates, alkyl amido ether carboxylates, alkyl succinates, fatty acyl sarcosinates, fatty acyl amino acids, fatty acyl taurates, fatty alkyl sulfoacetates, alkyl phosphates, and mixtures of two or more thereof.
  • Non-limiting examples of the preferred anionic surfactant includes linear alkyl benzene sulphonate, primary alkyl sulfate, methyl ester sulphonate or combinations thereof.
  • anionic surfactants useful herein include: C10 to C20 primary, branched chain and random alkyl sulfates (AS); mid-chain branched alkyl sulfates as discussed in US 6,020,303 and US 6,060,443; mid-chain branched alkyl alkoxy sulfates as discussed in US 6,008, 181 and US 6,020,303; modified alkylbenzene sulfonate (MLAS) as discussed in WO 99/05243, WO 99/05242 and WO 99/05244; methyl ester sulfonate (MES); and alpha-olefin sulfonate (AOS).
  • AS branched chain and random alkyl sulfates
  • MLAS modified alkylbenzene sulfonate
  • MES methyl ester sulfonate
  • AOS alpha-olefin sulfonate
  • R"OSO3'M + Conventional primary alkyl sulfate surfactants have the general formula: R"OSO3'M + wherein R" is typically a Cs to C20 alkyl (linear or branched, saturated or unsaturated) group, which may be straight chain or branched chain, and M is a water-solubilizing cation.
  • R" is a C10 to C15 alkyl group
  • M is alkali metal
  • R" is C12 to C14 alkyl and M is sodium. Examples include sodium lauryl sulphate, ammonium lauryl sulphate and sodium coco sulphate.
  • anionic surfactants useful herein include: a) C10 to C20 primary, branched-chain and random alkyl sulfates (AS); b) C10 to C secondary (2,3)-alkyl sulfates having following formulae: wherein M is hydrogen or a cation which provides charge neutrality, and all M units, whether associated with a surfactant or adjunct ingredient, can either be a hydrogen atom or a cation depending upon the form isolated by the artisan or the relative pH of the system wherein the compound is used, with non-limiting examples of preferred cations including sodium, potassium, ammonium, and mixtures thereof, and x is an integer of at least about 7, preferably at least about 9, and y is an integer of at least 8, preferably at least about 9; c) C10 to C alkyl alkoxy sulfates (AES) wherein preferably z is from 1 to 30; d) C to C alkyl alkoxy carboxylates preferably comprising 1 to
  • the additional anionic surfactant may be liner, branched or combinations thereof.
  • Anionic surfactants may exist in an acid form and the acid form may be neutralized to form a surfactant salt.
  • Typical agents for neutralization include a metal counter ion base such as a hydroxide, e.g., NaOH or KOH.
  • Further agents for neutralizing anionic surfactants include ammonia, amines, or alkanolamines. Suitable non-limiting examples include monoethanolamine, diethanolamine, triethanolamine, and other linear or branched alkanolamines known in the art, for example, 2-amino-1-propanol, 1- aminopropanol, monoisopropanolamine, or 1-amino-3-propanol.
  • the anionic surfactant is a non-soap anionic surfactant.
  • the term “soap” is used herein in its popular sense, i.e. , the alkali metal or alkanol ammonium salts of aliphatic, alkanes, or alkene monocarboxylic acids.
  • the anionic surfactant includes 0 wt.% to 20 wt.% alkyl sulfates, preferably 0 wt.% to 15 wt.% alkyl sulfates, preferably 0 wt.% to 10 wt.% alkyl sulfates, preferably PAS.
  • the anionic surfactant may also include from 0 wt.% to 10 wt.% MES, preferably 0 wt.% to 5 wt.% MES.
  • the detergent composition of the present invention includes from 2 wt.% to 50 wt.% of an anionic surfactant, more preferably from 2 wt.% to 40 wt.% of an anionic surfactant.
  • the detergent composition comprises at least 4 wt.%, still preferably at least 5 wt.%, still preferably at least 10 wt.%, most preferably at least 15 wt.% of the anionic surfactant, but typically not more than 45 wt.%, still preferably not more than 40 wt.%, still further preferably not more than 35 wt.%, still more preferably not more than 30 wt.% and most preferably not more than 20 wt.% of an anionic surfactant based on the weight of the detergent composition.
  • the additional anionic surfactant is preferably alkyl sulphate, alkyl ether sulphate or combinations thereof.
  • the solid laundry unit-dose composition according to the present invention includes from 0.1 wt.% to 20 wt.% of the alkyl ether sulphate or alkyl ether carboxylate surfactant and preferably 1 wt.% to 20 wt.% of alkyl sulphate surfactants.
  • the alkyl ether sulphate surfactant has an average EO group ranging from 1 to 10, still preferably 1 to 7 and most preferably 1 to 3.
  • Nonionic surfactants for use in the invention are typically polyoxyalkylene compounds, i.e. the reaction product of alkylene oxides (such as ethylene oxide or propylene oxide or mixtures thereof) with starter molecules having a hydrophobic group and a reactive hydrogen atom which is reactive with the alkylene oxide.
  • Such starter molecules include alcohols, acids, amides or alkyl phenols. Where the starter molecule is an alcohol, the reaction product is known as an alcohol alkoxylate.
  • the polyoxyalkylene compounds can have a variety of block and heteric (random) structures. For example, they can comprise a single block of alkylene oxide, or they can be diblock alkoxylates or triblock alkoxylates.
  • the blocks can be all ethylene oxide or all propylene oxide, or the blocks can contain a heteric mixture of alkylene oxides.
  • examples of such materials include Cs to C22 alkyl phenol ethoxylates with an average of from 5 to 25 moles of ethylene oxide per mole of alkyl phenol; and aliphatic alcohol ethoxylates such as Cs to Cis primary or secondary linear or branched alcohol ethoxylates with an average of from 2 to 40 moles of ethylene oxide per mole of alcohol.
  • a preferred class of nonionic surfactant for use in the invention includes aliphatic Cs to G , more preferably C12 to C15 primary linear alcohol ethoxylates with an average of from 3 to 20, more preferably from 5 to 10 moles of ethylene oxide per mole of alcohol.
  • a further class of surfactants include the alkyl poly glycosides and rhamnolipids. Mixtures of any of the above-described nonionic surfactant may also be used.
  • the composition includes from 0 to 10 wt.%, still preferably from 0 to 5 wt.% nonionic surfactant.
  • the laundry detergent composition includes a combination of LAS along with non-ionic surfactant and still preferably LAS, nonionic surfactant and additional anionic surfactant selected from alkyl ether sulphate, alkyl sulphate surfactants.
  • the solid laundry unit-dose composition preferably includes a builder.
  • builder as used herein means all materials which tend to remove polyvalent metal ions (usually calcium and/or magnesium) from a solution either by ion exchange, or complexation and/or sequestration, or suspension or precipitation.
  • the builder is preferably a precipitation builder.
  • Disclosed detergent composition includes from 1 wt.% to 40 wt.% carbonate builders.
  • the carbonate builder is an alkali metal carbonates, bicarbonate, sesquicarbonate or mixtures thereof.
  • the carbonate builder is preferably an alkali metal carbonate.
  • Preferred alkali carbonates are sodium and/or potassium carbonate of which sodium carbonate is particularly preferred. It is further preferred that sodium carbonate makes up at least 75 wt.%, more preferably at least 85 wt.% and even more preferably at least 90 wt.% of the total weight of the carbonate salt.
  • the detergent composition comprises at least 0.8 wt.%, still preferably at least 1 wt.%, still preferably at least 2 wt.%, most preferably at least 5 wt.% of the carbonate salt, but typically not more than 15 wt.%, still preferably not more than 13 wt.%, most preferably not more than 10 wt.% of carbonate builder based on the weight of the detergent composition.
  • the laundry composition of the present invention may preferably include a further non-carbonate inorganic salt.
  • the preferred inorganic non-carbonate salts may be selected from the group consisting of silicates, silica, zeolites, phosphates or mixtures thereof.
  • Suitable silicates include the water-soluble sodium silicates with an SiC>2: Na2 ⁇ D ratio of from 1.0 to 2.8, with ratios of from 1.6 to 2.4 being preferred, and 2.0 ratio being most preferred.
  • the silicates may be in the form of either the anhydrous salt or a hydrated salt.
  • Sodium silicate with an SiC>2: Na2 ⁇ D ratio of 2.0 is the most preferred silicate.
  • non-carbonate builder may be organic builders which includes but are not limited to as succinates, carboxylates, malonates, polycarboxylates, citric acid or a salt thereof.
  • composition of the present invention is substantially free of zeolite salt and phosphate builder.
  • substantially free it is meant that there is no deliberately added phosphate or zeolite in the composition.
  • the composition preferably includes inorganic compound which is preferably a calcium-based compound, more preferably the calcium-based compound is selected from calcium carbonate, calcium magnesium carbonate, calcite, dolomite or mixtures thereof.
  • inorganic compound in the laundry composition includes magnesium and aluminium silicates, calcium and magnesium oxides.
  • the laundry composition includes calcite commercially available as ForcalTM II.
  • the solid unit dose laundry composition of the present invention may preferably include polymers which provide cleaning or care benefits.
  • the cleaning polymer includes but is not limited to soil release polymer, carboxylate polymers, antiredeposition polymers, cellulosic polymers, care polymers, amphiphilic alkoxylated grease cleaning polymers, clay soil cleaning polymers, soil suspending polymers or mixtures thereof.
  • the amount of polymer in the solid unit dose laundry composition ranges from 0.05 to 10 wt.%.
  • Anti-redeposition polymers are designed to suspend or disperse soil.
  • antiredeposition polymers are polyethylene glycol polymers, polycarboxylate polymers, polyethyleneimine polymers or mixtures thereof.
  • Such polymers are available from BASF under the trade name Sokalan®CP5 (neutralised form) and Sokalan®CP45 (acidic form).
  • Sokalan®CP5 neutralised form
  • Sokalan®CP45 acidic form
  • the amount of anti-redeposition polymer in the solid unit dose laundry composition ranges from 0.05 to 8 wt.%.
  • Soil release polymers are designed to modify the surface of the fabric to facilitate the ease of removal of soil.
  • Suitable soil release polymers are sold by Clariant under the TexCare® series of polymers, e.g. TexCare® SRN240, TexCare® SRN100, TexCare® SRN170, TexCare® SRN300, TexCare® SRN325, TexCare® SRA100 and TexCare® SRA300.
  • Other suitable soil release polymers are sold by Rhodia under the Repel-o- Tex® series of polymers, e.g. Repel-o-Tex® SF2, Repel-o-Tex® SRP6 and Repel-o- Tex® Crystal.
  • a preferred polymer is selected from the group consisting of polyester soil release polymer, both end-capped and non-end-capped sulphonated PET/POET polymers, both end-capped and non-end-capped unsulphonated PET/POET polymers or combinations thereof.
  • the amount of soil release polymer in the solid unit dose laundry composition ranges from 0.05 to 8 wt.%.
  • the laundry compositions may also preferably comprise a sequestrant component.
  • a sequestrant component examples include the alkali metal citrates, succinates, malonates, carboxymethyl succinates, carboxylates, polycarboxylates and polyacetyl carboxylates. Specific examples include sodium, potassium and lithium salts of oxydisuccinic acid, mellitic acid, benzene polycarboxylic acids, and citric acid.
  • Other examples are DEQUESTTM, organic phosphonate type sequestering agents sold by Monsanto and alkanehydroxy phosphonates.
  • the sequestrants includes Dequest(R) 2066 (Diethylenetriamine penta(methylene phosphonic acid or Heptasodium DTPMP), HEDP (1 - hydroxyethylidene -1 ,1 ,-diphosphonic acid) or combinations thereof.
  • the amount of sequestrant in the solid unit dose laundry composition ranges from 0.03 wt.% to 5 wt.%.
  • Shading dye can be used to improve the performance of the compositions.
  • Preferred dyes are violet or blue. It is believed that the deposition on fabrics of a low level of a dye of these shades, masks yellowing of fabrics.
  • a further advantage of shading dyes is that they can be used to mask any yellow tint in the composition itself. Shading dyes are well known in the art of laundry solid formulation.
  • Suitable and preferred classes of dyes include direct dyes, acid dyes, hydrophobic dyes, basic dyes, reactive dyes and dye conjugates.
  • Preferred examples are Disperse Violet 28, Direct violet 9, Direct violet 66, Direct violet 99, Solvent 13, Acid Violet 50, anthraquinone dyes covalently bound to ethoxylate or propoxylated polyethylene imine as described in WO2011/047987 and WO2012/119859 alkoxylated mono-azo thiophenes and any combinations thereof.
  • the shading dye is preferably present is present in the composition in range from 0.0001 to 0.1 wt %. Depending upon the nature of the shading dye there are preferred ranges depending upon the efficacy of the shading dye which is dependent on class and particular efficacy within any particular class.
  • fluorescer in the compositions.
  • these fluorescent agents are supplied and used in the form of their alkali metal salts, for example, the sodium salts.
  • the total amount of the fluorescent agent or agents used in the composition is generally from 0.005 to 2 wt %, more preferably 0.01 to 0.5 wt % the composition.
  • Preferred classes of fluorescer are: Di-styryl biphenyl compounds, e.g. Tinopal ® CBS- X, Di-amine stilbene di-sulphonic acid compounds, e.g. Tinopal DMS pure Xtra, Tinopal 5BMGX, and Blankophor ® HRH, and Pyrazoline compounds, e.g. Blankophor SN.
  • Di-styryl biphenyl compounds e.g. Tinopal ® CBS- X
  • Di-amine stilbene di-sulphonic acid compounds e.g. Tinopal DMS pure Xtra, Tinopal 5BMGX, and Blankophor ® HRH
  • Pyrazoline compounds e.g. Blankophor SN.
  • Preferred fluorescers are: sodium 2 (4-styryl-3-sulfophenyl)-2H-napthol[1,2-d]triazole, disodium 4,4'-bis ⁇ [(4-anilino-6-(N methyl-N-2 hydroxyethyl) amino 1 ,3,5-triazin-2- yl)]amino ⁇ stilbene-2-2' disulfonate, disodium 4,4'-bis ⁇ [(4-anilino-6-morpholino-1,3,5- triazin-2-yl)]amino ⁇ stilbene-2-2' disulfonate, and disodium 4,4'-bis(2- sulfoslyryl)biphenyl.
  • the fluoescer is a di-styryl biphenyl compound, preferably sodium 2,2'-([1 ,1'-biphenyl]-4,4'-diylbis(ethene-2,1-diyl))dibenzenesulfonate (CAS-No 27344-41-8).
  • the composition is substantially free of optical brighteners and fluorescers.
  • the composition has 0 wt.% optical brighteners and fluorescers.
  • the bleach includes sodium percarbonate or any other hydrogen peroxide precursor.
  • the bleach is preferably a peroxide.
  • the bleach is a percarbonate.
  • the bleach is a coated percarbonate. If present, preferred amounts of bleach are from 1.0 to 25 wt.%, more preferably at from 2.0 to 20 wt. %, even more preferably from 5 to 15 wt.%.
  • the composition preferably also includes a bleach activator such as peroxyacid bleach precursors.
  • the bleach activators include sodium tetraacetylethylenediamine (TAED).
  • the composition may include an acyl hydrazine bleach catalyst.
  • the laundry unit-dose composition includes visual cues.
  • the compositions may comprise visual cues of solid material that is not dissolved in the composition.
  • Preferred visual cues are lamellar cues formed from polymer film and possibly comprising functional ingredients. Enzymes and bleach catalysts are examples of such ingredients.
  • perfume, particularly microencapsulated perfume may be included in visual cues.
  • Visual cues generally are of a color contrasting to the color of the remaining laundry composition.
  • Perfume is well known in the art and are preferably incorporated into laundry compositions described herein at level of 0.1 wt.% to 5 wt%.
  • the perfume may be selected from encapsulated perfume, microcapsules, perfume oil or mixtures thereof.
  • a composition of the invention may comprise an effective amount of one or more enzyme selected from the group comprising, pectate lyase, protease, amylase, cellulase, lipase, mannanase and mixtures thereof.
  • the enzymes are preferably present with corresponding enzyme stabilizers. Commercially available enzymes from Novozyme and Dupont are preferred. Water content:
  • the solid laundry unit-dose composition includes from 0.1 wt.% to 4.5 wt.% water, still preferably from 0.1 wt.% to 3.5 wt.% water.
  • the laundry composition of the present invention may have a pH at 1% in deionized water of greater than about 6, alternatively greater than 7.
  • a method of preparing a solid unit dose laundry composition includes the steps of: i) obtaining a LAS surfactant from a plastic waste feedstock, preferably from a pyrolysis oil prepared from the waste plastic feedstock; and, ii) incorporating the LAS surfactant obtained from a plastic waste feedstock, LAS obtained from petroleum feedstock into a solid laundry composition. iii) converting the solid laundry composition into a unit dose composition by either extruding, tabletting or enclosing in a water-soluble pouch an unit dose amount of the composition.
  • the surfactant may be preferably incorporated into the solid laundry composition at any suitable stage in the process of preparing the solid laundry composition.
  • the surfactant is preferably added into the aqueous slurry.
  • the surfactant may be blended into the carbonate builder or other laundry ingredient and converted to a premix before incorporating into the solid laundry composition.
  • the unit-dose composition in the form of a tablet is formed by a method comprising the steps of: i) blending LAS obtained from waste plastic feedstock and LAS obtained from petroleum feedstock preferably along with the other ingredients in the laundry composition; ii) adding the blended laundry composition mix to a mould; and, iii) applying pressure to form a unit dose laundry composition.
  • Unit dose composition in the form of tablets with even more layer can be made by these routes, but with extra stages of loading particulate material into the die, and possibly compacting after each stage.
  • Tableting machinery able to carry out such operations is known, for example suitable tablet presses are available from Fette and from Korch. Tableting may be carried out at ambient temperature or at a temperature above ambient which may allow adequate strength to be achieved with less applied pressure during compaction.
  • the laundry composition is preferably supplied to the tableting machinery at an elevated temperature. This will of course supply heat to the tableting machinery, but the machinery may be heated by other means.
  • any heat is supplied, it is envisaged that it will be supplied conventionally, such as by passing the particulate composition through an oven, rather than by any application of microwave energy.
  • the unit dose laundry composition in the form of a tablet may be of any shape. Nonlimiting examples includes square, triangle, circular or other known shapes.
  • a LAS obtained from a plastic waste feedstock in a solid laundry unit-dose composition for lowering the amount of the components present in the laundry composition derived from a petroleum feedstock as compared to a traditional laundry composition.
  • Yet another aspect of the present invention is a use of LAS obtained from a plastic waste feedstock in a solid laundry unit-dose composition for providing improved biodegradability.
  • Yet another aspect of the present invention is a use LAS obtained from a plastic waste feedstock in a solid laundry unit-dose composition for providing for providing excellent detersive properties.
  • Such improved detersive properties may result in improved removal of hydrophobic soils from clothing.
  • a solid laundry unit-dose detergent composition in the form of a tablet according to the present invention were prepared having LAS obtained from plastic waste feedstock at an amount which constituted 5 wt.% of the total LAS present as given in Table 1. The remaining LAS was obtained from petroleum feedstock.
  • a solid laundry unit-dose composition in the form of water-soluble pouch enclosing the spray-dried powder laundry composition according to the present invention was prepared by first preparing a spray-dried laundry composition having LAS obtained from plastic waste feedstock at an amount which constituted 5 wt.% of the total LAS and thereafter enclosing them in a pouch formed by sealing a PVOH film. The remaining LAS was obtained from petroleum feedstock.
  • LAS obtained from waste plastic feedstock (Ex 4 and Ex 5) has a much lower surface tension at lower concentrations. This means that the surface tension changes during the wash cycle more for LAS obtained from petroleum source than for LAS obtained from waste-plastic feedstock. This means that LAS obtained from waste-plastic feedstock (Ex 4 and Ex 5) performs better than LAS obtained from petroleum feedstock (Ex C and Ex D) during the wash.

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Abstract

La présente invention concerne une composition de dose unitaire de lessive solide. La composition détergente de lessive comprend du LAS obtenu à partir d'un produit de départ issu de déchets plastiques sans aucun effet indésirable sur les performances de la composition.
PCT/EP2022/077551 2021-10-08 2022-10-04 Composition de lessive WO2023057437A1 (fr)

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