Solid linear alkylbenzene sulfonate anionic detersive surfactant particles

Abstract

The invention relates to a solid linear alkylbenzene sulfonate anionic decontamination surfactant particle. The particles comprise a polycationic salt of a linear alkylbenzene sulfonic acid having both a magnesium cation and a sodium cation. The weight ratio of the magnesium salt of linear alkylbenzene sulfonic acid to the sodium salt of linear alkylbenzene sulfonic acid is in the range of 0.6: 1 to 9: 1.

Description

Technical Field

[0001] The present invention relates to a solid linear alkylbenzene sulfonate anionic detersive surfactant particle. The particle contains a polycationic salt of linear alkylbenzene sulfonic acid having both magnesium cations and sodium cations. The weight ratio of the magnesium salt of linear alkylbenzene sulfonic acid to the sodium salt of linear alkylbenzene sulfonic acid is strictly controlled. The particle has good storage stability and good solubility when in contact with water. Background Art

[0002] Laundry detergent manufacturers prepare products with surfactants as core chemicals to provide fabric cleaning during washing. A type of such surfactant category comprises anionic linear alkylbenzene sulfonate (LAS), which can be delivered in a variety of physical forms. For the manufacture of solid powder detergents, these forms generally comprise spray-dried particles, agglomerated particles or flaky particles. Which of these forms is used generally depends on the following factors, such as but not limited to the surfactant activity of the particles, the manufacturing cost of the particles, the production rate of the particles, the physical properties of the particles and / or any combination of these and / or other factors.

[0003] Most of solid powder detergent industry provides LAS in the form of spray-dried particles or agglomerated particles.These particles are usually limited to the maximum mass / particle mass (that is, particle activity) of LAS with regard to its manufacturing capacity or the physical properties of final particles.Due to the adhesive properties of LAS, especially under wet conditions, the more active LAS particles tend to be more difficult to process.It is usually observed that the activity that increases LAS particles reduces the humidity when the processing problem is observed.Due to the industry's desire to obtain more concentrated preparations to reduce the carbon footprint of its application, therefore more active surfactant particles become more and more attractive, which has expanded the challenge of providing free-flowing powder detergent formulations to consumers.

[0004] The highest activity LAS particles currently available commercially are so-called LAS flakes, which are usually more than 80% by weight LAS. Therefore, they are particularly sensitive to moisture. The inventors have found that changing the counterions of the LAS material can affect the sensitivity of LAS to moisture, particularly the effect of moisture (the amount present) on its physical properties such as bulk flow. Compared with its NaLAS counterpart, it is observed that the highly active MgLAS2 particles maintain their free-flowing properties until a higher degree of moisture is present (measured as the relative humidity of the particles).

[0005] The inventors have also found that the dissolution kinetics of MgLAS2 particles are inferior to their NaLAS counterparts. However, the inventors have found that by preparing particles containing both MgLAS2 and NaLAS in very specific ratios, the negative cohesive properties of NaLAS can be avoided while avoiding the negative dissolution properties of MgLAS2. Summary of the invention

[0006] The present invention provides solid linear alkylbenzene sulfonate anionic detersive surfactant particles suitable for use in laundry detergent compositions, wherein the particles comprise from greater than 50% to 100% by weight of a polycationic salt of a linear alkylbenzene sulfonate comprising both magnesium cations and sodium cations, wherein the weight ratio of the magnesium salt of the linear alkylbenzene sulfonate to the sodium salt of the linear alkylbenzene sulfonate is in the range of 0.6:1 to 9:1. DETAILED DESCRIPTION

[0007] Solid linear alkylbenzene sulfonate anionic detersive surfactant particles

[0008] Solid linear alkylbenzene sulfonate anionic detersive surfactant particles are suitable for use in laundry detergent compositions. The particles contain greater than 50% to 100% by weight of a polycationic salt of linear alkylbenzene sulfonate containing both magnesium cations and sodium cations. The weight ratio of the magnesium salt of linear alkylbenzene sulfonate to the sodium salt of linear alkylbenzene sulfonate is in the range of 0.6:1 to 9:1.

[0009] Preferably, the particles comprise 60 to 99 wt%, or 70 to 97 wt%, or 80 to 95 wt% of the polycationic salt of linear alkylbenzene sulfonic acid.

[0010] The particles may contain an inorganic salt. The particles may contain from greater than 0% to 40% by weight of an inorganic salt. If present, the inorganic salt may be present in an amount from greater than 0% to 40% by weight, or from 1% to 40% by weight.

[0011] The particles may comprise from greater than 0 wt% to 20 wt% polymer. If present, the polymer may be present at a level from greater than 0 wt% to 20 wt%, or from 1 wt% to 20 wt%.

[0012] The particles may be in any suitable particle form. Suitable forms include spray-dried particles, agglomerates, bars, needles, rings, flakes. The preferred form is flakes.

[0013] Polycationic salts of linear alkylbenzene sulfonic acid

[0014] The polycationic salt of linear alkylbenzene sulfonic acid contains both magnesium cations and sodium cations. The weight ratio of the magnesium salt of linear alkylbenzene sulfonic acid to the sodium salt of linear alkylbenzene sulfonic acid is in the range of 0.6:1 to 9:1, preferably 0.8:1 to 9:1, preferably 0.9:1 to 7:1, preferably 1:1 to 5:1.

[0015] Preferably, the linear alkylbenzene sulfonic acid has a 2-phenyl isomer content of 15 to 20% by weight.

[0016] Inorganic salt

[0017] Any suitable inorganic salt may be used.

[0018] Suitable inorganic salts are selected from the group consisting of carbonates, chlorides, magnesium salts, silicates, sulfates, zeolite salts, and any combination thereof.

[0019] Preferred inorganic salts are selected from the group consisting of magnesium carbonate, magnesium sulfate, sodium carbonate, sodium sulfate, and any combination thereof.

[0020] polymer

[0021] Any suitable polymer may be used.

[0022] Suitable polymers are selected from the group consisting of modified polysaccharide polymers, polycarboxylate polymers, polyethylene glycol polymers, polyethylene imine polymers, silicone polymers, terephthalate polymers, other polyester polymers, and any combination thereof.

[0023] Preferred polymers are selected from the group consisting of cellulosic polymers, polycarboxylate polymers, polyethylene glycol polymers, silicone polymers, terephthalate polymers, and any combination thereof.

[0024] Suitable polymers are selected from modified polyamine polymers, modified polysaccharide polymers, polyalkylene oxide polymers, polycarboxylate polymers, silicone polymers, terephthalate polymers, other polyester polymers, and any combination thereof.

[0025] Preferably, the polymer is selected from the group consisting of polyamine polymers, modified polysaccharide polymers, polyalkylene oxide polymers, polycarboxylate polymers, and any combination thereof, most preferably polycarboxylate polymers.

[0026] Modified polyamine polymer

[0027] Suitable modified polyamine polymers comprise a polyamine core structure and a plurality of alkoxylate groups attached to the core structure. The polyamine core structure includes polyalkyleneimines and linear or branched oligoamines.

[0028] The polyamine core structure and the alkoxylate groups attached to the core structure can be further derivatized. For example, the polyamine core structure can be further derivatized with C1-C 30 Straight or branched chain alkyl, more preferably C1-C 10 Or even C1-C5 straight or branched alkyl, most preferably methyl, partially or fully quaternized. The alkoxylate groups may be further sulfated, sulfonated and / or substituted with amino functional groups.

[0029] Suitable modified polyamine dispersants include ethoxylated polyethyleneimines (EPEIs). EPEIs are effective dispersants for hydrophilic stains, especially hydrophilic particulate stains such as clays.

[0030] Preferably, EPEI comprises a polyethyleneimine backbone having a weight average molecular weight between 100 g / mol and 2000 g / mol, preferably between 200 g / mol and 1500 g / mol, more preferably between 300 g / mol and 1000 g / mol, even more preferably between 400 g / mol and 800 g / mol, most preferably between 500 g / mol and 700 g / mol, preferably about 600 g / mol. The ethoxylated chains in EPEI may have a weight average molecular weight of 200 g / mol to 2000 g / mol per ethoxylated chain, preferably a weight average molecular weight of 400 g / mol to 1500 g / mol, more preferably a weight average molecular weight of 600 g / mol to 1000 g / mol, and most preferably about 880 g / mol. The ethoxylated chains in EPEI have an average of 5 to 40, preferably 10 to 30, more preferably 15 to 25, even more preferably 18 to 22, most preferably about 20 ethoxy units per ethoxylated chain. The total weight average molecular weight of EPEI can be 5000g / mol to 20000g / mol, preferably 7500g / mol to 17500g / mol, more preferably 10000g / mol to 15000g / mol, even more preferably 12000g / mol to 13000g / mol, most preferably about 12700g / mol. Preferred examples are polyethyleneimine cores (average molecular weight is about 600g / mol) ethoxylated to every NH 20 EO groups. Suitable EPEI of this type includes Sokalan HP20 purchased from BASF, Lutensol FP620 purchased from BASF. Examples of usable polyethyleneimine ethoxylates also include those produced by reacting ethylene oxide with Epomine SP-006 manufactured by Nippon Shokubai.

[0031] The EPEI may comprise polyethyleneimine having an average molecular weight (Mw) in the range of 1800 to 5000 g / mol (before ethoxylation), and the polyoxyethylene side chains may have an average of 25 to 40 ethoxy units per side chain bonded to the polyethyleneimine backbone.

[0032] Suitable modified polyamine polymers include amphiphilic alkoxylated polyalkyleneimine polymers. These polymers have balanced hydrophilicity and hydrophobicity so that they remove grease and body soil particles from surfaces and keep the particles suspended in the wash liquid. Suitable amphiphilic water-soluble alkoxylated polyalkyleneimine polymers comprise a polyalkyleneimine core, preferably a polyethyleneimine core, and an alkoxylate group attached to the core. Suitable alkoxylate groups have the following structure:

[0033] *--[A 2 -O] m -[CH2-CH2-O] n -[A 3 -O] p -R

[0034] (V)

[0035] in:

[0036] The "*" in each case denotes half of a bond to a nitrogen atom of the core.

[0037] In each case, A 2 Independently selected from 1,2-propylene, 1,2-butylene and 1,2-isobutylene.

[0038] A 3 It is 1,2-propylene.

[0039] At each occurrence, R is independently selected from hydrogen and C1-C4-alkyl, preferably hydrogen.

[0040] The average value of m is in the range of 0 to 2, preferably 0.

[0041] The average value of n is in the range of 5 to 50.

[0042] The average value of p ranges from 3 to about 50.

[0043] Suitable alkoxylated polyalkyleneimine polymers have a degree of quaternization ranging from 0 to 50, preferably 0 to 20, and more preferably 0 to 10.

[0044] A preferred alkoxylated polyalkyleneimine polymer is a modified polyethyleneimine (MW=600) with 24 ethoxylated groups per -NH and 16 propoxylated groups per -NH. Another preferred alkoxylated polyalkyleneimine polymer is a modified polyethyleneimine (MW=600) with 10 ethoxylated groups per -NH and 7 propoxylated groups per -NH.

[0045] Suitable alkoxylated polyalkyleneimine polymers include Sokalan HP30 Booster available from BASF.

[0046] Suitable modified polyamine polymers include zwitterionic polyamines. Suitable zwitterionic polyamines have the following structure:

[0047]

[0048] in:

[0049] R is independently C3-C 20 Straight-chain or branched-chain alkylene.

[0050] R 1 A polyalkyleneoxy unit terminated with an anionic unit having the formula: -(R 2 O) x R 3 .

[0051] R 2 It is a C2-C4 straight or branched chain alkylene group, preferably C2 (ethylene group).

[0052] R 3 is hydrogen, anion unit and mixtures thereof, wherein not all R 3 The groups are all hydrogen, preferably R 3 The anionic unit is selected from -(CH2) p CO2M; -(CH2) q SO3M; -(CH2) q OSO3M; -(CH2) q CH(SO3M)-CH2SO3M; -(CH2) q CH(OSO3M)CH2OSO3M; -(CH2) q CH(SO3M)CH2SO3M; -(CH2) p PO3M; -PO3M; -SO3M and mixtures thereof; wherein M is hydrogen or a water-soluble cation, preferably selected from sodium, potassium, ammonium and mixtures thereof, and in an amount sufficient to satisfy charge balance.

[0053] x is 5-50, preferably 10-40, even more preferably 15-30, most preferably 20-25.

[0054] Q is a quaternary ammonium unit selected from the group consisting of: C1-C 30 Straight or branched alkyl, C6-C 30 Cycloalkyl, C7-C 30 Substituted or unsubstituted alkylene aryl and mixtures thereof, preferably C1-C 30Straight or branched chain alkyl, even more preferably C1-C 10 or even C1-C5 straight or branched alkyl, most preferably methyl; the degree of quaternization is preferably over 50%, more preferably over 70%, even more preferably over 90%, most preferably about 100%.

[0055] X - is an anion present in sufficient amount to provide electrical neutrality, preferably a water-soluble anion selected from the group consisting of chloride, bromide, iodide, methylsulfate, and mixtures thereof, more preferably chloride.

[0056] n is 0 to 8, preferably 0 to 4, preferably 0 to 2, most preferably 0.

[0057] Suitable zwitterionic polyamines have the following general structure: bis((C2H5O)(C2H4O)n)(CH3)-N + -C x H 2x -N + -(CH3)-bis((C2H5O)(C2H4O)n), wherein n=20 to 30, and x=3 to 8, or sulfated or sulfonated versions thereof.

[0058] Particularly preferred zwitterionic polyamines are available from BASF under the trade name Lutensit Z96 polymer (zwitterionic hexamethylenediamine according to the formula: 100% quaternized and about 40% polyethoxylated (EO 24 ) group is sulfonated).

[0059]

[0060] Another suitable zwitterionic polyamine is the amphoteric modified oligomeric polypropylene imine ethoxylate.

[0061] Modified polysaccharide polymers

[0062] A variety of polysaccharides can be used as starting materials for chemical modification to prepare modified polysaccharide polymers, including cellulose, starch, guar gum, dextran, polydextrose, chitin, curdlan, xylose, inulin, pullulan, locust bean gum, cassia gum, tamarind gum (xyloglucan), xanthan gum, amylose, amylopectin, scleroglucan, and any combination thereof.

[0063] The most common type of modified polysaccharide is modified cellulose.

[0064] Modified cellulose polymers include anionically modified cellulose polymers modified with functional groups containing a negative charge. Suitable anionically modified cellulose polymers include carboxyalkyl celluloses, such as carboxymethyl cellulose. The carboxymethyl cellulose may have a degree of carboxymethyl substitution of from about 0.5 to about 0.9 and a molecular weight of from about 80,000 Da to about 300,000 Da. Suitable carboxymethyl celluloses include those sold by CP Kelco or Nouryon. series, which includes GDA; hydrophobically modified carboxymethyl cellulose, for example, sold under the trade name Alkyl ketene dimer derivatives of carboxymethyl cellulose sold under the trade name SH1 or Carboxymethylcellulose is sold in blocks as cellulose acetate. Other suitable anionically modified cellulosic polymers include sulfoalkylcellulose and sulfoethylcellulose.

[0065] Modified cellulose polymers also include nonionic modified cellulose polymers that have been modified with functional groups that do not contain any charge. Suitable nonionic modified cellulose polymers include alkyl celluloses, hydroxyalkyl celluloses, hydroxyalkyl alkyl celluloses, alkyl alkoxy alkyl celluloses. Suitable nonionic modified cellulose polymers also include nonionic cellulose carbamates and nonionic 6-deoxy-6-amino-cellulose derivatives. Examples of alkyl celluloses include methyl cellulose (MC), ethyl cellulose (EC), etc. Suitable ethyl cellulose is available from Dow Chemicals, DuPont or IFF under the trade name Ethocel TM Examples of hydroxyalkyl celluloses include hydroxyethyl cellulose (HEC) and hydroxypropyl cellulose (HPC). Suitable HEC is sold by Ashland under the trade name Natrosol TM Hydroxyethylcellulose is sold as Natrosol in various grades TM 250, which has an overall molar substitution (MS) of 2.5. Suitable HEC is also available from Dow Chemicals under the trade name CELLOSIZE TM Hydroxyethylcellulose is sold as hydroxyethylcellulose. Suitable HPC is sold by Ashland under the trade name Klucel TM Examples of hydroxyalkyl alkyl celluloses include hydroxypropyl methyl cellulose (HPMC), suitable HPMC being available in various grades from Dow Chemicals, DuPont or IFF under the trade name Methocel TM Sold and marketed by Ashland under the trade name Benecel TM sell.

[0066] Modified cellulose polymers also include cationically modified cellulose polymers that have been modified by functional groups containing cationic charges. Suitable cationically modified celluloses include quaternized hydroxyethyl cellulose (Polyquaternium-10), which is available from Dow Chemical under the trade name Ucare, such as Ucare LR400, Ucare LR30M, Ucare JR125, Ucare JR400, etc. Suitable cationically modified cellulose polymers also include quaternized hydroxyethyl cellulose (HEC) polymers (Polyquaternium-67) substituted with trimethylammonium and dimethyldodecyl ammonium cations, which are available from Dow Chemical under the trade name SoftCAT, such as SoftCAT SK, SoftCAT SK-MH, SoftCAT SX, SoftCAT SL. Other suitable cationically modified celluloses include SupraCare, available from Dow Chemical under the trade name TM Those sold, such as SupraCare TM 150. SupraCare TM 133. SupraCare TM 212. Suitable cationically modified cellulosic polymers also include those modified with cationic groups and hydrophobic groups.

[0067] Another suitable type of modified polysaccharide is modified guar gum. The modified guar gum may be nonionically modified, anionically modified and / or cationically modified. Suitable nonionically modified guar gums include hydroxypropyl guar gum, such as N-Hance guar gum available from Ashland. TM HP40 and HP40S guar gums. Suitable examples of modified guar gums also include anionic and nonionic modified carboxymethyl hydroxypropyl guar gums (CMHPG), such as Galactasol available from Ashland. TM Suitable modified guar gums also include cationic modified guar gums such as guar hydroxypropyltrimonium chloride, which is available as AquaCat TM CG518 cationic solution, AquaCat TM PF618 cationic solution, N-Hance TM 3000, 3196, 3215, BF-13, BF-17, C261, C261N, CG13, CCG45 were purchased from Ashland. Other cationic modified guar gum polymers were C 162, Excel, ExcelSGI, Optima, C 13S, C 13SH, ​​C14 S, C-17, LS SGI, C-500STD are available from Solvay. Other nonionic and / or anionic modified guar gums include, for example HP 105 (Hydroxypropyl Guar Gum), SOFT and HP-120COS (carboxymethyl hydroxypropyl guar gum).

[0068] Suitable modified polysaccharide polymers also include modified starches. Examples of modified starches include carboxylic acid esters of starch, starch with, for example, C6-C 24 Esterification products of alk(en)ylsuccinic anhydride; and maleic acid starch (starch reacted with maleic anhydride). Examples of modified starch also include, but are not limited to, acetylated starch, acetylated distarch adipate, distarch phosphate, hydroxypropyl starch, hydroxypropyl distarch phosphate, phosphorylated distarch phosphate, acetylated distarch phosphate, sodium starch octenylsuccinate.

[0069] Suitable modified polysaccharide polymers also include polymers based on other polysaccharides, such as cationic dextran polymers commercially available under the trade names CDC, CDC-L, CDC-H from Meito Sangyo.

[0070] Suitable modified polysaccharide polymers also include polymers based on polydextrose. Suitable modified polydextrose are based on α1,3-polydextrose and / or 1,6-polydextrose. Preferably, the modified polydextrose may be cationically modified, such as cationically modified α1,3-polydextrose, such as cationically modified α1,6-polydextrose. Another preferred class of modified polydextrose may be hydrophobically modified and / or hydrophilically modified. Polydextrose esters are particularly preferred due to their performance and biodegradability.

[0071] Other suitable polysaccharide polymers include those based on inulin. Examples of modified inulins include carboxymethyl modified inulin (CMI), suitable CMIs are the Carboxyline series sold by Cosun Beet Company, including Carboxyline 25-40D, Carboxyline 25D powder, Carboxyline 20 LS D powder, Carboxyline 25, Carboxyline 25-30 UP. Examples of modified inulins also include cationically modified inulins, suitable cationically modified inulins include the Quatin series sold by Cosun Beet Company, including Quatin 350, Quatin 380 and Quatin 1280, characterized by different degrees of substitution (DS), cation density (meq / g) and molecular weight (g / mol).

[0072] Suitable modified polysaccharide polymers also include polymers based on other polysaccharides, such as xylose carbamate, carboxy- or sulfoalkylated pullulan, carboxy- or sulfoalkylated chitosan, and any combination thereof.

[0073] Polyalkylene oxide polymer

[0074] Suitable polyalkylene oxide polymers include poly(ethylene oxide). Preferably, the molecular weight of the poly(ethylene oxide) is from 1000 to 10000, more preferably from 2000 to 9000, more preferably from 3000 to 8500, most preferably from 4000 to 8000, such as 5000, 6000, 7000.

[0075] Suitable polyalkylene oxide polymers include graft polymers. Suitable graft polymers may be based on polyalkylene oxide. Suitable polymers comprise a polyalkylene oxide backbone (A) as a grafting base and polymer side chains (B) grafted thereon. The polymer side chains (B) can be obtained by polymerization of at least one vinyl ester monomer. The polyalkylene oxide backbone (A) can be obtained by polymerization of at least one monomer selected from the group consisting of ethylene oxide, 1,2-propylene oxide, 1,2-butylene oxide, 2,3-butylene oxide, 1,2-pentene oxide or 2,3-pentene oxide. Such graft polymers are known to be effective soil suspending polymers for hydrophobic and hydrophilic stains, surfactant promoters, and sometimes as dye transfer inhibitors.

[0076] Suitable graft polymers include amphiphilic graft copolymers comprising a polyethylene glycol backbone (A) as graft base and at least one pendant side chain (B) selected from polyvinyl acetate, polyvinyl alcohol and mixtures thereof. A preferred graft polymer of this type is Sokalan HP22 from BASF.

[0077] Suitable graft polymers are amphiphilic graft polymers based on water-soluble polyalkylene oxides (A) as grafting base and side chains formed by polymerization of vinyl ester components (B), said polymers generally having an average of <1 grafting site per 50 alkylene oxide units and an average molar mass M of 3 000 to 100 000. A particularly preferred graft polymer of this type is a polyvinyl acetate grafted polyethylene oxide copolymer, which has polyethylene oxide as grafting base and a plurality of polyvinyl acetate side chains. The molecular weight of the polyethylene oxide backbone is generally about 6000, and the weight ratio of polyethylene oxide to polyvinyl acetate is generally about 40 to 60, and there is generally no more than 1 grafting site per 50 ethylene oxide units. The most preferred polymer of this type is available from BASF as Sokalan PG101.

[0078] Suitable graft polymers include a block copolymer backbone (A) comprising a graft polymer as a graft base, wherein the block copolymer backbone (A) can be obtained by polymerization of at least two monomers selected from the group consisting of ethylene oxide, 1,2-propylene oxide, 1,2-butylene oxide, 2,3-butylene oxide, 1,2-pentene oxide or 2,3-pentene oxide, wherein the number (x) of each block in the block copolymer backbone (A) is an integer, wherein x is generally 2 to 10, and preferably 3 to 5; and (B) polymer side chains grafted onto the block copolymer backbone, wherein the polymer side chains (B) can be obtained by polymerization of at least one vinyl ester monomer. These polymers have improved biodegradability.

[0079] Suitable graft polymers include graft polymers comprising: a polyalkylene oxide backbone (A) having a number average molecular weight of about 1000 Daltons to about 20,000 Daltons and based on ethylene oxide, propylene oxide or butylene oxide; and side chains (B) derived from N-vinyl pyrrolidone; and side chains (C) derived from vinyl esters derived from saturated monocarboxylic acids containing 1 to 6 carbon atoms and / or methyl or ethyl esters of acrylic acid or methacrylic acid.

[0080] Polycarboxylate polymers

[0081] The polycarboxylate polymer generally comprises at least one carboxyl-containing monomer. The carboxyl-containing monomer is generally selected from acrylic acid, methacrylic acid, fumaric acid, maleic acid, itaconic acid, aconitic acid, mesaconic acid, citraconic acid, methylenemalonic acid, their salts, their anhydrides and any combination thereof.

[0082] Suitable polycarboxylate polymers include polyacrylate homopolymers having a molecular weight of 4,000Da to 9,000Da or 6,000Da to 9,000Da. Other suitable carboxylate polymers include copolymers of acrylic acid (and / or methacrylic acid) and maleic acid having a molecular weight of 50,000Da to 120,000Da or 60,000Da to 80,000Da. Polyacrylate homopolymers and copolymers of acrylic acid (and / or methacrylic acid) and maleic acid are commercially available from DowChemicals as Acusol 445 and 445N, Acusol 531, Acusol 463, Acusol 448, Acusol 460, Acusol 465, Acusol 497, Acusol 490, and commercially available from BASF as Sokalan CP 5, Sokalan CP 7, Sokalan CP 45 and Sokalan CP12S.

[0083] Suitable polycarboxylate polymers also include polyitaconate homopolymers such as those sold by Itaconix. DSP 2K TM and Amaze SP from Nouryon.

[0084] Suitable polycarboxylate polymers also include copolymers comprising carboxyl-containing monomers and one or more sulfonate- or sulfonic acid-containing monomers. The sulfonate- or sulfonic acid-containing monomers are typically selected from 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS), 2-methacrylamido-2-methyl-1-propanesulfonic acid, 3-methacrylamido-2-hydroxy-propanesulfonic acid, allylsulfonic acid, methallylsulfonic acid, 3-allyloxy-2-hydroxy-1-propanesulfonic acid, 2-methyl-2-propylene-1-sulfonic acid, styrenesulfonic acid, vinylsulfonic acid, 3-sulfopropylacrylate, 3-sulfopropylmethacrylate, sulfomethacrylamide, sulfomethylmethacrylamide, and water-soluble salts thereof.

[0085] Suitable polymers may include maleic acid, acrylic acid, and 3-allyloxy-2-hydroxy-1-propanesulfonic acid. Suitable polymers may include acrylic acid and 2-acrylamido-2-methyl-propanesulfonate, such as those sold under the trade name Acusol 588 by Dow Chemicals, those sold under the trade name Sokalan CP50 by BASF, those sold under the trade name Aquatreat AR-545, Versaflex 310, and Versaflex 310-37 by Nouryon.

[0086] Suitable polymers include poly (itaconic acid-co-AMPS) sodium salt, such as available from Itaconix TSI TM 322 and CHT TM 122.

[0087] Suitable polymers also include those containing other structural units in addition to the monomer containing a sulfonate group or a sulfonic acid group and the monomer containing a carboxyl group. Suitable other monomers are ether bond-containing monomers represented by the following formulas (1) and (2):

[0088]

[0089] Among them, in formula (1):

[0090] R0 represents a hydrogen atom or a CH3 group.

[0091] R represents a CH2 group, a CH2CH2 group or a single bond.

[0092] x represents a number from 0 to 50, preferably from 0 to 20, more preferably from 0 to 5 (provided that when R is a single bond, x represents a number from 1 to 5).

[0093] R1 is a hydrogen atom or a C1 to C 20 Organic group.

[0094] Among them, in formula (2):

[0095] R0 represents a hydrogen atom or a CH3 group.

[0096] R represents a CH2 group, a CH2CH2 group or a single bond.

[0097] x represents a number 0-5.

[0098] R1 is a hydrogen atom or a C1 to C 20 Organic group.

[0099] Particularly preferred polymers contain structural units derived from 1 to 49 wt % of 1-(allyloxy)-3-butoxypropan-2-ol, 50 to 98 wt % of acrylic acid or methacrylic acid, and 1 to 49 wt % of 3-allyloxy-2-hydroxy-1-propanesulfonic acid, and have a weight average molecular weight of about 20,000 to about 60,000. Particularly preferred polymers of this type contain structural units derived from 1 to 10 wt % of 1-(allyloxy)-3-butoxypropan-2-ol, 70 to 89 wt % of acrylic acid or methacrylic acid, and 10 to 20 wt % of 3-allyloxy-2-hydroxy-1-propanesulfonic acid, and have a weight average molecular weight of about 30,000 to about 60,000. Herein, when R0 is H, R is CH2, x is 0 and R1 is n-butyl (C4-alkyl), 1-(allyloxy)-3-butoxypropan-2-ol is a preferred monomer as represented by formula (2).

[0100] Suitable polycarboxylate polymers also include copolymers comprising carboxyl-containing monomers and other suitable monomers. Other suitable monomers are selected from esters and / or amides of carboxyl-containing monomers, such as C1-C12-hydroxy-1,1-dimethyl ... 20 Alkyl esters; alkylene groups; vinyl ethers such as methyl vinyl ether, styrene and any mixtures thereof. A particularly preferred family of polymers of this type is sold by Ashland under the trade name Gantrez, which includes Gantrez An (alternating copolymers of methyl vinyl ether and maleic anhydride), Gantrez S (alternating copolymers of methyl vinyl ether and maleic acid), Gantrez ES (alternating copolymers of methyl vinyl ether and maleate), Gantrez MS (alternating copolymers of methyl vinyl ether and maleate).

[0101] Suitable polycarboxylate polymers also include polyepoxysuccinic acid polymers (PESA). The most preferred polyepoxysuccinic acid polymers can be identified using the following CAS numbers: 51274-37-4 or 109578-44-1. Suitable polyepoxysuccinic acid polymers are commercially available from various suppliers, such as Aquapharm Chemicals Pvt. Ltd (trade name: Maxinol 600); Shandong Taihe Water Treatment Technologies Co., Ltd (trade name: PESA) and Sirius International (trade name: Briteframe PESA).

[0102] Suitable polycarboxylate polymers may comprise monomers having at least one aspartic acid group or a salt thereof, the polymer comprising at least 25 mol %, 40 mol % or 50 mol % of said monomer. A preferred example is poly(aspartic acid) sodium salt having a molecular weight of 2000 to 3000 g / mol, which is marketed under the trade name DS 100 is available from Lanxess. Suitable polyaspartates may be further modified.

[0103] Terephthalate polymers

[0104] Suitable terephthalate polymers are terephthalate derived polyester polymers comprising structural units (I) and / or (II):

[0105] (I)_[(OCHR 1 -CHR 2 ) a -O-OC-Ar-CO-] d

[0106] (II)_[(OCHR 3 -CHR 4 ) b -O-OC-sAr-CO-] e

[0107] in:

[0108] a and b are 1 to 200.

[0109] d and e are 1 to 50.

[0110] Ar is independently selected from 1,4-substituted phenylene and 1,3-substituted phenylene.

[0111] sAr is a 1,3-substituted phenylene substituted at position 5 by -SO3M; wherein M is a counterion selected from Na, Li, K, Mg / 2, Ca / 2, Al / 3, ammonium, monoalkylammonium, dialkylammonium, trialkylammonium or tetraalkylammonium, wherein the alkyl group is C1-C 18 Alkyl or C2-C 10 hydroxyalkyl or a mixture thereof.

[0112] R 1 , R 2 , R 3 , R 4 Independently selected from H or C1-C 18 n-Alkyl or isoalkyl; preferably selected from H or C1 alkyl.

[0113] Optionally, the polymer may also comprise one or more terminal groups (III) derived from a polyalkylene glycol monoalkyl ether, preferably selected from the group consisting of structure (IV-a)

[0114] -O-[C2H4-O] c -[C3H6-O] d -[C4H8-O] e -R7 (IV-a)

[0115] in:

[0116] R7 is a straight chain or branched chain C 1-30 Alkyl, C2-C 30 alkenyl or cycloalkyl group having 5 to 9 carbon atoms, or C8-C 30 Aryl group, or C6-C 30 Arylalkyl group; preferably C1-4 alkyl, more preferably methyl.

[0117] c, d and e are numbers independently selected from 0 to 200, based on molar averages, wherein the sum of c+d+e is 2 to 500.

[0118] Wherein the [C2H4-O], [C3H6-O] and [C4H8-O] groups of the terminal group (IV-a) may be arranged in blocks, alternations, periods and / or statistics, preferably in blocks and / or statistics, and any of the [C2H4-O], [C3H6-O] and [C4H8-O] groups of the terminal group (IV-a) may be connected to -R7 and / or -O. Preferably, the [C3H6-O] group is connected to -O, and -O is further connected to -OC-Ar-CO- or -OC-sAr-CO-.

[0119] Optionally, the polymer may also contain one or more anionic terminal units (IV) and / or (V) as described in EP3222647.+ , Li + , K + 、1 / 2Mg 2+ 、1 / 2Ca 2+ 、1 / 3Al 3+ , ammonium, monoalkylammonium, dialkylammonium, trialkylammonium or tetraalkylammonium counterions, wherein the alkyl group is C1-C 18 Alkyl or C2-C 10 hydroxyalkyl or a mixture thereof.

[0120] -O-CH2CH2-SO3M (IV)

[0121]

[0122] Optionally, the polymer may comprise cross-linked multifunctional structural units having at least three functional groups capable of undergoing esterification reactions. The functional groups may be, for example, acid-, alcohol-, ester-, anhydride- or epoxy groups.

[0123] Optionally, other dicarboxylic acids or polycarboxylic acids or their salts or their (di)alkyl esters may be used in the polyesters, such as naphthalene-1,4-dicarboxylic acid, naphthalene-2,6-dicarboxylic acid, tetrahydrophthalic acid, trimellitic acid, diphenoxyethane-4,4′-dicarboxylic acid, diphenyl-4,4′-dicarboxylic acid, 2,5-furandicarboxylic acid, adipic acid, sebacic acid, decane-1,10-dicarboxylic acid, fumaric acid, succinic acid, 1,4-cyclohexanedicarboxylic acid, cyclohexanediacetic acid, glutaric acid, azelaic acid or their salts or their (di)alkyl esters, preferably their (C1-C4)-(di)alkyl esters, and more preferably their (di)methyl esters or mixtures thereof.

[0124] One class of preferred polyester polymers is nonionic polyester polymers that do not contain the structural unit (II) described above. Particularly preferred nonionic terephthalate-derived polymers have a structure according to the following formula:

[0125]

[0126] in:

[0127] R5 and R6 are independently selected from H or CH3. More preferably, one of R5 and R6 is H and the other is CH3.

[0128] Based on the molar average, c and d are numbers independently selected from 0 to 200, wherein the sum of c+d is 2 to 400.

[0129] More preferably, d is 0-50 and c is 1-200.

[0130] More preferably, d is 1-10 and c is 5-150.

[0131] R7 is C 1- C4 alkyl, and more preferably methyl.

[0132] Based on the molar average value, n is 1 to 50.

[0133] An example of a most preferred suitable terephthalate derived polymer as described above has one of R5 and R6 being H and the other being CH3; d being 0; c being 5-100, and R7 being methyl, and n being 3-10.

[0134] Other suitable terephthalate derived polyester polymers may be end-capped. The end-capping groups of these SRPs are typically selected from:

[0135] X-(OC2H4) n -(OC3H6) m -

[0136] wherein X is a C1-C4 alkyl group, and preferably a methyl group, -(OC2H4) groups and -(OC3H6) groups are arranged in blocks, and the blocks consisting of -(OC3H6) groups are bonded to COO groups, n is a number with a molar average value of 40 to 50, and m is a number with a molar average value of 1 to 10 and preferably 1 to 7.

[0137] The polyester may or may not be biodegradable, with preferred soil release polymers being readily biodegradable.

[0138] Examples of suitable polyesters include those supplied by Clariant Series, including nonionic polymers SRN 100, SRN 170, SRN 170C, SRN 170Terra, SRN 172, SRN 240, SRN 260, SRN260life, SRN 260SG Terra, SRN UL50, SRN 300, SRN 325; and anionic polymers SRA 100, SRA 300, SRA 300 F. Examples of suitable polymers also include REPEL-O- Series of polymers, including nonionic polymers Crystal, Crystal PLUS, Crystal NAT, SRP6; and anionic polymers SF-2. Other examples of polymers include those supplied by WeylChem Series of polymers, including nonionic polymers PLN1, PLN2 and anionic polymers PSA1. Other examples of polymers are Polymers, such as those supplied by Sasol SL, HSCB, L235MB and G82. Suitable polymers include Sorez 100 (available from ISP or Ashland).

[0139] Other polyester polymers

[0140] Suitable other polyester polymers include polyester soil release polymers derived from bio-based 2,5-furandicarboxylic acid and its derivatives.

[0141] Laundry detergent composition .

[0142] The laundry detergent composition comprises solid linear alkylbenzene sulfonate anionic detersive surfactant particles.

[0143] Typically, the laundry detergent composition is a fully formulated laundry detergent composition rather than a portion thereof, such as a spray-dried, extruded or agglomerated granulate which forms only part of the laundry detergent composition. Typically, the solid composition comprises a plurality of chemically distinct particles, such as spray-dried base detergent particles and / or agglomerated base detergent particles and / or extruded base detergent particles; one or more, typically two or more, or five or more, or even ten or more particles are combined, the particles being selected from: surfactant particles, including surfactant agglomerates, surfactant extrudates, surfactant needles, surfactant faces, surfactant flakes; phosphate particles; zeolite particles; silicate particles, especially sodium silicate particles; carbonate particles, especially sodium carbonate particles; polymer particles, such as carboxylate polymer particles, cellulose polymer particles, starch particles, polyester particles, polyamine particles, terephthalic acid polymer particles, polyethylene glycol particles; aesthetic particles, such as colored strips, needles, lamellar particles and ring particles; enzyme particles, such as protease particles, amylase particles, lipase particles, cellulase particles, mannanase particles, pectate lyase particles, xyloglucanase particles, bleaching enzyme particles and any of these enzymes; a co-granule, preferably the enzyme granules comprise sodium sulfate; bleaching agent granules, such as percarbonate granules, especially coated percarbonate granules, such as percarbonate coated with carbonate, sulfate, silicate, borosilicate, or any combination thereof, perborate granules, bleach activator granules such as tetraacetylethylenediamine granules and / or alkyloxybenzenesulfonate granules, bleach catalyst granules such as transition metal catalyst granules, and / or isoquinolinium bleach catalyst granules, preformed peracid granules, especially coated preformed peracid granules particles; filler particles, such as sulfate particles and chloride particles; clay particles, such as montmorillonite particles and clay and silicone particles; flocculant particles, such as polyethylene oxide particles; wax particles, such as wax agglomerates; silicone particles, brightener particles; dye transfer inhibitor particles; dye fixative particles; perfume particles, such as perfume microcapsules and starch-encapsulated perfume accord particles, and pro-perfume particles, such as Schiff base reaction product particles; hueing dye particles; chelant particles, such as chelant agglomerates; and any combination thereof.

[0144] Suitable laundry detergent compositions comprise detergent ingredients selected from the group consisting of detersive surfactants, such as anionic detersive surfactants, nonionic detersive surfactants, cationic detersive surfactants, zwitterionic detersive surfactants and amphoteric detersive surfactants; polymers, such as carboxylate polymers, soil release polymers, anti-redeposition polymers, cellulosic polymers and care polymers; bleaches, such as hydrogen peroxide sources, bleach activators, bleach catalysts and preformed peracids; photobleaches, such as sulfonated zinc phthalocyanine and / or sulfonated aluminum phthalocyanine; enzymes, such as proteases, amylases, cellulases, lipases; zeolite builders; phosphate builders; auxiliary builders, such as citric acid and citrates; carbonates, such as sodium carbonate and sodium bicarbonate; sulfates, such as sodium sulfate; silicates, such as sodium silicate; chloride salts, such as sodium chloride; brighteners; chelating agents; hueing agents; dye transfer inhibitors; dye fixatives; perfumes; silicones; fabric softeners, such as clays; flocculants, such as polyethylene oxides; suds suppressors; and any combination thereof.

[0145] Suitable laundry detergent compositions may have a low buffering capacity. Such laundry detergent compositions typically have a reserve alkalinity to pH 9.5 of less than 5.0 g NaOH / 100 g. These low buffered laundry detergent compositions typically contain low levels of carbonates.

[0146] Detersive surfactants: Suitable detersive surfactants include anionic detersive surfactants, nonionic detersive surfactants, cationic detersive surfactants, zwitterionic detersive surfactants and amphoteric detersive surfactants. Suitable detersive surfactants may be linear or branched, substituted or unsubstituted, and may be derived from petrochemical materials or biomaterials.

[0147] Anionic detersive surfactants: Suitable anionic detersive surfactants include sulfonate detersive surfactants and sulfate detersive surfactants.

[0148] Suitable sulfonate detersive surfactants include methyl sulfonate, alpha olefin sulfonates, alkyl benzene sulfonates, especially alkyl benzene sulfonates, preferably C 10-13 Alkylbenzene sulfonates. Suitable alkylbenzene sulfonates (LAS) are available, preferably by sulfonating commercially available linear alkylbenzenes (LABs); suitable LABs include lower 2-phenyl LABs, other suitable LABs include higher 2-phenyl LABs, such as those sold under the trade name Those supplied by Sasol.

[0149] Suitable sulfate detersive surfactants include alkyl sulfates, preferably C 8-18 Alkyl sulfates, or mainly C 12 Alkyl sulfate.

[0150] Preferred sulfate detersive surfactants are alkyl alkoxylated sulfates, preferably alkyl ethoxylated sulfates, preferably C 8-18 Alkyl alkoxylated sulfate, preferably C 8-18 Alkyl ethoxylated sulfates, preferably alkyl alkoxylated sulfates, have an average degree of alkoxylation of 0.5 to 20, preferably 0.5 to 10, preferably alkyl alkoxylated sulfates are C 8-18 Alkyl ethoxylated sulfates having an average degree of ethoxylation of from 0.5 to 10, preferably from 0.5 to 5, more preferably from 0.5 to 3, and most preferably from 0.5 to 1.5.

[0151] The alkyl sulfates, alkyl alkoxylated sulfates, and alkyl benzene sulfonates may be linear or branched, substituted or unsubstituted, and may be derived from petrochemical or biomaterials.

[0152] Other suitable anionic detersive surfactants include the alkyl ether carboxylates.

[0153] Suitable anionic detersive surfactants may be in the form of salts, and suitable counterions include sodium, calcium, magnesium, amino alcohols, and any combination thereof. The preferred counterion is sodium.

[0154] Nonionic detersive surfactant: Suitable nonionic detersive surfactants are selected from the group consisting of: C8-C 18 Alkyl ethoxylates, such as those available from Shell Nonionic surfactant; C6-C 12 Alkylphenol alkoxylates, wherein the alkoxylate units are preferably ethyleneoxy units, propyleneoxy units, or mixtures thereof; C 12 -C 18 Alcohol and C6-C 12 Condensates of alkylphenols with ethylene oxide / propylene oxide block polymers, such as those available from BASF Alkyl polysaccharides, preferably alkyl polyglycosides; methyl ester ethoxylates; polyhydroxy fatty acid amides; ether-terminated poly(alkoxylated) alcohol surfactants; and mixtures thereof.

[0155] Suitable nonionic detersive surfactants are alkyl polyglucosides and / or alkyl alkoxylated alcohols.

[0156] Suitable nonionic detersive surfactants include alkyl alkoxylated alcohols, preferably C 8-18 Alkyl alkoxylated alcohol, preferably C 8-18 The alkyl ethoxylated alcohol, preferably the alkyl alkoxylated alcohol, has an average degree of alkoxylation of 1 to 50, preferably 1 to 30, or 1 to 20, or 1 to 10, preferably the alkyl alkoxylated alcohol is C 8-18Alkyl ethoxylated alcohols having an average degree of ethoxylation of 1 to 10, preferably 1 to 7, more preferably 1 to 5, and most preferably 3 to 7. The alkyl alkoxylated alcohols may be linear or branched, and substituted or unsubstituted.

[0157] Suitable nonionic detersive surfactants include those based on secondary alcohols.

[0158] Cationic detersive surfactants: Suitable cationic detersive surfactants include alkyl pyridinium compounds, alkyl quaternary ammonium compounds, alkyl quaternary phosphonium compounds, alkyl ternary sulfonium compounds, and mixtures thereof.

[0159] Preferred cationic detersive surfactants are quaternary ammonium compounds having the general formula:

[0160] (R)(R1)(R2)(R3)N + X -

[0161] Wherein R is a linear or branched, substituted or unsubstituted C 6-18 Alkyl or alkenyl moiety, R1 and R2 are independently selected from methyl or ethyl moieties, R3 is a hydroxyl, hydroxymethyl or hydroxyethyl moiety, and X is an anion providing electrical neutrality, and preferred anions include: halide ions, preferably chloride ions; sulfate; and sulfonate.

[0162] Zwitterionic detersive surfactants: Suitable zwitterionic detersive surfactants include amine oxides and / or betaines.

[0163] Polymers: Suitable polymers include carboxylate polymers, soil release polymers, anti-redeposition polymers, cellulosic polymers, conditioning polymers, and any combination thereof.

[0164] Carboxylate polymer: The composition may comprise a carboxylate polymer such as a maleate / acrylate random copolymer or a polyacrylate homopolymer. Suitable carboxylate polymers include: polyacrylate homopolymers having a molecular weight of 4,000 to 9,000 Da; maleate / acrylate random copolymers having a molecular weight of 50,000 to 100,000 Da, or 60,000 to 80,000 Da.

[0165] Another suitable carboxylate polymer is a copolymer comprising: (i) 50 wt% to less than 98 wt% of structural units derived from one or more monomers containing carboxyl groups; (ii) 1 wt% to less than 49 wt% of structural units derived from one or more monomers containing sulfonate moieties; and (iii) 1 wt% to 49 wt% of structural units derived from one or more types of monomers selected from monomers containing ether bonds represented by formula (I) and (II):

[0166] Formula (I):

[0167]

[0168] Wherein in formula (I), R0 represents a hydrogen atom or a CH3 group, R represents a CH2 group, a CH2CH2 group or a single bond, and X represents a number from 0 to 5, provided that when R is a single bond, X represents a number from 1 to 5, and R1 is a hydrogen atom or a C1 to C 20 Organic groups;

[0169] Formula (II)

[0170]

[0171] In formula (II), R0 represents a hydrogen atom or a CH3 group, R represents a CH2 group, a CH2CH2 group or a single bond, X represents a number from 0 to 5, and R1 is a hydrogen atom or a C1 to C 20 Organic group.

[0172] It may be preferred that the polymer has a weight average molecular weight of at least 50 kDa or even at least 70 kDa.

[0173] Soil release polymer: The composition may comprise a soil release polymer. Suitable soil release polymers have a structure as defined by one of the following structures (I), (II) or (III):

[0174] (I)-[(OCHR 1 -CHR 2 ) a -O-OC-Ar-CO-] d

[0175] (II)-[(OCHR 3 -CHR 4 ) b -O-OC-sAr-CO-] e

[0176] (III)-[(OCHR 5 -CHR 6 ) c -OR 7 ] f

[0177] in:

[0178] a, b and c are 1 to 200;

[0179] d, e and f are 1 to 50;

[0180] Ar is 1,4-substituted phenylene;

[0181] sAr is 1,3-substituted phenylene substituted at position 5 by SO3Me;

[0182] Me is Li, K, Mg / 2, Ca / 2, Al / 3, ammonium, monoalkylammonium, dialkylammonium, trialkylammonium or tetraalkylammonium, wherein the alkyl group is C1-C 18 Alkyl or C2-C 10 Hydroxyalkyl or mixtures thereof;

[0183] R 1 , R 2 , R 3 , R 4 , R 5 and R 6 Independently selected from H or C1-C 18 n-alkyl or C1-C 18 isoalkyl; and

[0184] R 7 A straight or branched C1-C 18 Alkyl, or straight or branched C2-C 30 alkenyl, or a cycloalkyl group having 5 to 9 carbon atoms, or a C8-C 30 Aryl group, or C6-C 30 Arylalkyl group.

[0185] Suitable soil release polymers are available from Clariant as A series of polymers are sold, e.g. SRN240 and SRA300. Other suitable soil release polymers are available from Solvay as A series of polymers are sold, e.g. SF2 and Crystal.

[0186] Anti-redeposition polymers: Suitable anti-redeposition polymers include polyethylene glycol polymers and / or polyethylene imine polymers.

[0187] Suitable polyethylene glycol polymers include random graft copolymers comprising: (i) a hydrophilic backbone comprising polyethylene glycol; and (ii) one or more hydrophobic side chains selected from the group consisting of: C4-C 25Alkyl groups, polypropylene, polybutylene, vinyl esters of saturated C1-C6 monocarboxylic acids, C1-C6 alkyl esters of acrylic or methacrylic acid, and mixtures thereof. Suitable polyethylene glycol polymers have a polyethylene glycol backbone having randomly grafted polyvinyl acetate side chains. The average molecular weight of the polyethylene glycol backbone may be in the range of 2,000Da to 20,000Da, or 4,000Da to 8,000Da. The molecular weight ratio of the polyethylene glycol backbone to the polyvinyl acetate side chains may be in the range of 1:1 to 1:5, or 1:1.2 to 1:2. The average number of grafting sites per ethylene oxide unit may be less than 0.02, or less than 0.016, the average number of grafting sites per ethylene oxide unit may be in the range of 0.010 to 0.018, or the average number of grafting sites per ethylene oxide unit may be less than 0.010, or in the range of 0.004 to 0.008.

[0188] Suitable polyethylene glycol polymers are described in WO08 / 007320.

[0189] A suitable polyethylene glycol polymer is Sokalan HP22.

[0190] Cellulosic polymer: Suitable cellulosic polymers are selected from alkyl cellulose, alkyl alkoxyalkyl cellulose, carboxyalkyl cellulose, alkyl carboxyalkyl cellulose, sulfonate alkyl cellulose, more preferably selected from carboxymethyl cellulose, methyl cellulose, methyl hydroxyethyl cellulose, methyl carboxymethyl cellulose and mixtures thereof.

[0191] Suitable carboxymethyl celluloses have a degree of carboxymethyl substitution of 0.5 to 0.9 and a molecular weight of 100,000 Da to 300,000 Da.

[0192] Suitable carboxymethyl celluloses have a degree of substitution greater than 0.65 and a degree of blockiness greater than 0.45, for example as described in WO 09 / 154933.

[0193] Care polymers: Suitable care polymers include cationically modified or hydrophobically modified cellulosic polymers. Such modified cellulosic polymers can provide anti-abrasion benefits and dye lock benefits to fabrics during the wash cycle. Suitable cellulosic polymers include cationically modified hydroxyethyl cellulose.

[0194] Other suitable care polymers include dye lock polymers, for example condensation oligomers produced by condensation of imidazole and epichlorohydrin, preferably in a 1:4:1 ratio. Suitable commercially available dye lock polymers are FDI (Cognis).

[0195] Other suitable care polymers include amino-silicones, which can provide fabric feel benefits and fabric form retention benefits.

[0196] Bleaching agents: Suitable bleaching agents include a hydrogen peroxide source, a bleach activator, a bleach catalyst, a preformed peracid, and any combination thereof. Particularly suitable bleaching agents include a hydrogen peroxide source in combination with a bleach activator and / or a bleach catalyst.

[0197] Hydrogen Peroxide Source: Suitable hydrogen peroxide sources include sodium perborate and / or sodium percarbonate.

[0198] Bleach Activators: Suitable bleach activators include tetraacetylethylenediamine and / or alkylphenol sulfonates.

[0199] Bleach catalyst: The composition may contain a bleach catalyst. Suitable bleach catalysts include oxaziridinium bleach catalysts, transition metal bleach catalysts, especially manganese and iron bleach catalysts. Suitable bleach catalysts have a structure that conforms to the following general formula:

[0200]

[0201] Where R 13 Selected from the group consisting of 2-ethylhexyl, 2-propylheptyl, 2-butyloctyl, 2-pentylnonyl, 2-hexyldecyl, n-dodecyl, n-tetradecyl, n-hexadecyl, n-octadecyl, isononyl, isodecyl, isotridecyl and isopentadecyl.

[0202] Preformed Peracids: Suitable preformed peracids include phthalimido-peroxycaproic acid.

[0203] Enzymes: Suitable enzymes include lipases, proteases, cellulases, amylases, and any combination thereof.

[0204] Proteases: Suitable proteases include metalloproteases and serine proteases. Examples of suitable neutral or alkaline proteases include: subtilisin (EC 3.4.21.62); trypsin-type or chymotrypsin-type proteases; and metalloproteases. Suitable proteases include chemically or genetically modified mutants of the aforementioned suitable proteases.

[0205] Suitable commercially available proteases include those sold under the trade names Liquanase Savinase and Those sold by Novozymes A / S (Denmark); under the trade name Prefer A series of proteases, including P280, P281, P2018-C, P2081-WE, P2082-EE and P2083-A / J, Purafect Purafect and Purafect Those sold by DuPont; under the trade name and Those sold by Solvay Enzymes; those purchased from Henkel / Kemira, namely BLAP (sequence shown in Figure 29 of US 5,352,604, with the following mutations: S99D+S101 R+S103A+V104I+G159S, hereinafter referred to as BLAP); BLAP R (BLAP with S3T+V4I+V199M+V205I+L217D), BLAP X (BLAP with S3T+V4I+V205I) and BLAP F49 (BLAP with S3T+V4I+A194P+V199M+V205I+L217D), all from Henkel / Kemira; and KAP (alkalophilic Bacillus subtilisin with mutations A230V+S256G+S259N) from Kao.

[0206] Suitable proteases are described in WO11 / 140316 and WO11 / 072117.

[0207] Amylase: Suitable amylases are derived from AA560 alpha amylase endogenous to Bacillus sp. DSM 12649, preferably with the following mutations: R118K, D183*, G184*, N195F, R320K and / or R458K. Suitable commercially available amylases include Plus, Natalase, Ultra, SZ, (both from Novozymes) and AA, Preferenz Series of amylase, and Ox Am, HT Plus (both from Du Pont).

[0208] Suitable amylases are described in WO06 / 002643.

[0209] Cellulase: Suitable cellulases include those derived from bacteria or fungi. Chemically modified or protein engineered mutants are also suitable. Suitable cellulases include cellulases from Bacillus, Pseudomonas, Humicola, Fusarium, Thielavia, Acremonium, such as fungal cellulases produced by Humicola insolens, Myceliophthora thermophila, and Fusarium oxysporum.

[0210] Commercially available cellulases include and Premium, and (Novozymes A / S), Series enzymes (Du Pont), and Series enzymes (AB Enzymes). Suitable commercially available cellulases include Premium, Classic. Suitable proteases are described in WO07 / 144857 and WO10 / 056652.

[0211] Lipase: Suitable lipases include those of bacterial, fungal or synthetic origin, and variants thereof. Chemically modified or protein engineered mutants are also suitable. Examples of suitable lipases include lipases from Humicola (synonym Thermomyces), such as from H. lanuginosa (T. lanuginosus).

[0212] The lipase may be a "first cycle lipase", e.g., such as those described in WO06 / 090335 and WO13 / 116261. In one aspect, the lipase is a first wash lipase, preferably a variant of the wild-type lipase from Thermomyces lanuginosus comprising a T231R and / or N233R mutation. Preferred lipases include those sold under the trade name and Those sold by Novozymes (Bagsvaerd, Denmark).

[0213] Other suitable lipases include: Liprl 139, e.g., as described in WO2013 / 171241; and TfuLip2, e.g., as described in WO2011 / 084412 and WO2013 / 033318.

[0214] Other enzymes: Other suitable enzymes are bleaching enzymes such as peroxidases / oxidases, including those of plant, bacterial or fungal origin, and variants thereof. Commercially available peroxidases include (Novozymes A / S). Other suitable enzymes include choline oxidase and perhydrolase, such as those used in Gentle Power Bleach TM Those in .

[0215] Other suitable enzymes include those sold under the trade name (from Novozymes A / S, Bagsvaerd, Denmark) and Pectate lyase sold under the trade name (Novozymes A / S, Bagsvaerd, Denmark) and Mannanase sold by Du Pont.

[0216] Zeolite builder: The composition may contain a zeolite builder. The composition may contain from 0% to 5% by weight of a zeolite builder, or 3% by weight of a zeolite builder. The composition may even be substantially free of zeolite builder; substantially free means "no intentionally added". Typical zeolite builders include zeolite A, zeolite P and zeolite MAP.

[0217] Phosphate builder: The composition may contain a phosphate builder. The composition may contain from 0% to 5% by weight of a phosphate builder, or to 3% by weight of a phosphate builder. The composition may even be substantially free of phosphate builders; substantially free means "no intentionally added". A typical phosphate builder is sodium tripolyphosphate.

[0218] Carbonate: The composition may comprise carbonate. The composition may comprise 0 wt% to 10 wt% carbonate, or 0 wt% to 5 wt% carbonate. The composition may even be substantially free of carbonate; substantially free means "no intentionally added". Suitable carbonates include sodium carbonate and sodium bicarbonate.

[0219] Silicate: The composition may comprise a silicate. The composition may comprise 0 to 10 wt% silicate, or 0 to 5 wt% silicate. A preferred silicate is sodium silicate, particularly preferred is sodium silicate having a Na2O:SiO2 ratio of 1.0 to 2.8, preferably 1.6 to 2.0.

[0220] Sulphate: A suitable sulphate is sodium sulphate.

[0221] Brighteners: Suitable fluorescent brighteners include: distyrylbiphenyl compounds, such as CBS-X; diaminostilbene disulfonic acid compounds, such as DMS pure Xtra and HRH; and pyrazoline compounds, e.g. SN; and coumarin compounds, e.g. SWN.

[0222] Preferred brighteners are: sodium 2(4-phenylvinyl-3-sulfophenyl)-2H-naphtho[1,2-d]triazole, disodium 4,4'-bis{[(4-phenylamino-6-(N-methyl-N-2-hydroxyethyl)amino1,3,5-triazine-2-yl)];amino}stilbene-2-2'disulfonate, disodium 4,4'-bis{[(4-phenylamino-6-morpholino-1,3,5-triazine-2-yl)]amino}stilbene-2-2'disulfonate and disodium 4,4'-bis(2-sulfonostyryl)biphenyl. A suitable fluorescent brightener is CI. Fluorescent brightener 260, which can be used in the form of its β or α crystalline form or a mixture of these crystalline forms.

[0223] Chelating agent: The composition may also include a chelating agent selected from the group consisting of diethylenetriamine pentaacetate, diethylenetriamine penta(methylphosphonic acid), ethylenediamine-N'N'-disuccinic acid, ethylenediamine tetraacetate, ethylenediamine tetra(methylenephosphonic acid) and hydroxyethane di(methylenephosphonic acid). Preferred chelating agents are ethylenediamine-N'N'-disuccinic acid (EDDS) and / or hydroxyethane diphosphonic acid (HEDP). The composition preferably includes ethylenediamine-N'N'-disuccinic acid or a salt thereof. Preferably, ethylenediamine-N'N'-disuccinic acid is in the form of the S,S enantiomer. Preferably, the composition includes 4,5-dihydroxy-isobenzene disulfonic acid disodium salt. Preferred chelating agents may also act as calcium carbonate crystal growth inhibitors, such as: 1-hydroxyethane diphosphonic acid (HEDP) and its salts; N,N-dicarboxymethyl-2-aminopentane-1,5-dioic acid and its salts; 2-phosphonobutane-1,2,4-tricarboxylic acid and its salts; and combinations thereof.

[0224] Hueing agents: Suitable hueing agents include small molecule dyes, typically belonging to the following Color Index (CI) classifications: acid dyes, direct dyes, basic dyes, reactive dyes (including their hydrolyzed forms), or solvent dyes or disperse dyes, such as dyes classified as blue, violet, red, green or black, and providing the desired hue, alone or in combination. Preferred such hues include acid violet 50, direct violet 9, 66 and 99, solvent violet 13, and any combination thereof.

[0225] Many hueing agents that may be suitable for use in the present invention are known and described in the art, such as the hueing agents described in WO2014 / 089386.

[0226] Suitable hueing agents include phthalocyanine and azo dye conjugates such as described in WO2009 / 069077.

[0227] Suitable toners can be alkoxylated. Such alkoxylated compounds can be prepared by organic synthesis, which can produce a mixture of molecules with different degrees of alkoxylation. Such mixtures can be used directly to provide toners, or can undergo purification steps to increase the ratio of the target molecule. Suitable toners include alkoxylated disazo dyes, such as those described in WO2012 / 054835, and / or alkoxylated thiophene azo dyes, such as those described in WO2008 / 087497 and WO2012 / 166768.

[0228] Toner can be incorporated in the detergent composition as a part for a reaction mixture, and this reaction mixture is the result of organic synthesis dye molecules by one or more optional purification steps.This type of reaction mixture generally comprises dye molecules themselves, and can also comprise the by-product of unreacted starting materials and / or organic synthesis pathways in addition.Suitable toner can be incorporated in the hueing dye particles, such as described in WO 2009 / 069077.

[0229] Dye transfer inhibitors: Suitable dye transfer inhibitors include polyamine N-oxide polymers, copolymers of N-vinyl pyrrolidone and N-vinylimidazole, polyvinyl pyrrolidone, polyvinyl oxazolidones, polyvinyl imidazoles and mixtures thereof. Preferred are poly(vinyl pyrrolidone), poly(vinyl pyridine betaine), poly(vinyl pyridine N-oxide), poly(vinyl pyrrolidone-vinylimidazole) and mixtures thereof. Suitable commercially available dye transfer inhibitors include PVP-K15 and K30 (Ashland), HP165, HP50, HP53, HP59, HP56K, HP56, HP66 (BASF), S-400, S403E and S-100 (Ashland).

[0230] Fragrances: Suitable fragrances include fragrance materials selected from the following groups: (a) fragrance materials having a ClogP of less than 3.0 and a boiling point of less than 250°C (Quadrant 1 fragrance materials); (b) fragrance materials having a ClogP of less than 3.0 and a boiling point of 250°C or greater (Quadrant 2 fragrance materials); (c) fragrance materials having a ClogP of 3.0 or greater and a boiling point of less than 250°C (Quadrant 3 fragrance materials); (d) fragrance materials having a ClogP of 3.0 or greater and a boiling point of 250°C or greater (Quadrant 4 fragrance materials); and (e) mixtures thereof.

[0231] For spices, it is preferably in the form of spices delivery technology. Such delivery technology also stabilizes and enhances the release of deposition and spices materials from washed fabrics. Such spices delivery technology can also be used to further increase the persistence of releasing spices from washed fabrics. Suitable spices delivery technology includes: spices microcapsules, former spices, polymer-assisted delivery, molecule-assisted delivery, fiber-assisted delivery, amine-assisted delivery, cyclodextrin, starch-encapsulated accords, zeolites and other inorganic carriers, and any mixture thereof. Suitable spices microcapsules are described in WO2009 / 101593.

[0232] Silicones: Suitable silicones include polydimethylsiloxanes and amino-silicones. Suitable silicones are described in WO05075616.

[0233] Methods for preparing solid compositions: Generally, the particles of the composition can be prepared by any suitable method, such as spray drying, agglomeration, extrusion, and any combination thereof.

[0234] Typically, a suitable spray drying process comprises the steps of forming an aqueous slurry mixture, transferring it to a pressure nozzle by at least one pump, preferably two pumps. Atomizing the aqueous slurry mixture into a spray drying tower and drying the aqueous slurry mixture to form spray-dried particles. Preferably, the spray drying tower is a countercurrent spray drying tower, although a cocurrent spray drying tower may also be suitable.

[0235] Typically, the spray-dried powder is subjected to cooling, such as air stripping. Typically, the spray-dried powder is subjected to particle size classification, such as sieving, to obtain a desired particle size distribution. Preferably, the spray-dried powder has a particle size distribution such that the weight average particle size is in the range of 300 microns to 500 microns, and less than 10% by weight of the spray-dried particles have a particle size greater than 2360 microns.

[0236] It may be preferred to heat the aqueous slurry mixture to raise the temperature prior to atomization into a spray drying tower, such as described in WO2009 / 158162.

[0237] For anionic surfactants, such as linear alkylbenzene sulfonates it may be preferred to introduce into the spray drying process after the step of forming the aqueous slurry mixture: for example, after pumping, the acid precursor is introduced into the aqueous slurry mixture, such as described in WO 09 / 158449.

[0238] It may be preferred for a gas such as air to be introduced into the spray drying process after the step of forming the aqueous slurry, such as described in WO2013 / 181205.

[0239] It may be preferred for any inorganic ingredients, such as sodium sulphate and sodium carbonate, if present in the aqueous slurry mixture, to be micronised to a small particle size, such as described in WO2012 / 134969.

[0240] Typically, suitable agglomeration processes include the step of contacting a detersive ingredient, such as a detersive surfactant, e.g. linear alkylbenzene sulfonate (LAS) and / or an alkyl alkoxylated sulfate, with an inorganic material, such as sodium carbonate and / or silica in a mixer. The agglomeration process may also be an in-situ neutralization agglomeration process, wherein an acid precursor of a detersive surfactant, such as LAS, is contacted with an alkaline material, such as carbonate and / or sodium hydroxide in a mixer, and wherein the acid precursor of the detersive surfactant is neutralized by the alkaline material during the agglomeration process to form a detersive surfactant.

[0241] Other suitable detergent ingredients that may be agglomerated include polymers, chelating agents, bleach activators, silicones, and any combination thereof.

[0242] Agglomeration process can be high, medium or low shear agglomeration process, wherein high shear, medium shear or low shear mixer is used accordingly. Agglomeration process can be multi-step agglomeration process, wherein two or more mixers are used, such as high shear mixer combined with medium or low shear mixer. Agglomeration process can be continuous process or batch process.

[0243] It may be preferred for the agglomerates to be subjected to a drying step, for example to a fluidized bed drying step. It may also be preferred for the agglomerates to be subjected to a cooling step, for example to a fluidized bed cooling step.

[0244] Typically, the agglomerates are subjected to particle size classification, such as fluidized bed elution and / or sieving, to obtain a desired particle size distribution. Preferably, the agglomerates have a particle size distribution such that the weight average particle size is in the range of 300 microns to 800 microns, and less than 10% by weight of the agglomerates have a particle size of less than 150 microns, and less than 10% by weight of the agglomerates have a particle size greater than 1200 microns.

[0245] It may be preferred for fine and oversized agglomerates to be recycled back into the agglomeration process. Typically, oversized particles are subjected to a comminution step, such as grinding, and recycled back to a suitable location in the agglomeration process, such as a mixer. Typically, fines are recycled back to a suitable location in the agglomeration process, such as a mixer.

[0246] For ingredients, such as polymers and / or nonionic detersive surfactants and / or perfumes, it may be preferred to spray onto base detergent particles, such as spray-dried base detergent particles and / or agglomerated base detergent particles. Typically, the spraying step is carried out in a tumble drum mixer.

[0247] Method for washing fabrics: The method for washing fabrics comprises contacting a solid composition with water to form a wash liquor, and the step of washing fabrics in the wash liquor. Typically, the wash liquor has a temperature of from 0°C to 90°C, or to 60°C, or to 40°C, or to 30°C, or to 20°C. Before, after, or while contacting the solid composition with water, the fabric may be contacted with water. Typically, the wash liquor is formed by contacting a laundry detergent with water in such an amount that the concentration of the laundry detergent composition in the wash liquor is 0.2g / L to 20g / L, or 0.5g / L to 10g / L, or to 5.0g / L. The method for washing fabrics can be carried out in a front-loading automatic washing machine, a top-loading automatic washing machine, including a high-efficiency automatic washing machine, or a suitable hand-washing container. Typically, the wash liquor contains 90 liters or less, or 60 liters or less, or 15 liters or less, or 10 liters or less of water. Typically, 200 g or less, alternatively 150 g or less, alternatively 100 g or less, alternatively 50 g or less of the laundry detergent composition is contacted with water to form the wash liquor.

[0248] Process for preparing solid linear alkylbenzene sulfonate anionic detersive surfactant particles

[0249] The method obtains a polycationic salt of a linear alkylbenzene sulfonic acid. The polycationic salt of a linear alkylbenzene sulfonic acid is obtained by the following process steps:

[0250] (a) partially neutralizing linear alkylbenzene sulfonic acid with a magnesium neutralizer to form partially magnesium-neutralized linear alkylbenzene sulfonic acid; and

[0251] (b) completely neutralizing the partially magnesium-neutralized linear alkylbenzene sulfonic acid from step (a) with a sodium neutralizer to form a polycationic salt of the linear alkylbenzene sulfonic acid comprising both magnesium cations and sodium cations.

[0252] Preferably, the magnesium neutralizing agent is selected from magnesium bicarbonate, magnesium carbonate, basic magnesium carbonate, magnesium hydroxide and any combination thereof.

[0253] Preferably, the sodium neutralizing agent is selected from sodium bicarbonate, sodium carbonate, sodium hydroxide and any combination thereof.

[0254] This method is a particularly efficient way to prepare the particles of the present invention.

[0255] Example

[0256] Example 1

[0257] Eleven linear alkylbenzene sulfonate (LAS) anionic detersive surfactant flakes were prepared, each having a different ratio of magnesium linear alkylbenzene sulfonate (MgLAS2) anionic detersive surfactant to sodium linear alkylbenzene sulfonate (NaLAS) anionic detersive surfactant.

[0258] All LAS flakes were prepared by drying pre-made LAS pastes. LAS pastes were prepared by neutralizing linear alkylbenzene sulfonic acid (HLAS) with magnesium hydroxide (Mg(OH)2) and / or sodium hydroxide (NaOH). For pastes and flakes containing both MgLAS2 and NaLAS, the order of addition of the hydroxide salts was MgOH2, then NaOH, to avoid precipitation of MgOH2 before complete neutralization of HLAS. The HLAS grade used contained trace amounts of sulfuric acid (H2SO4), which was neutralized before HLAS due to its lower pKa value. The reaction that occurred was therefore:

[0259] Neutralized with Mg(OH)2 only (Paste / Flake A below)

[0260] 1.H2SO4+Mg(OH)2→MgSO4+2H2O

[0261] 2. 2HLAS+Mg(OH)2→Mg(LAS)2+2H2O

[0262] Neutralize with both Mg(OH)2 and NaOH (paste / sheet BJ below)

[0263] 1.H2SO4+Mg(OH)2→MgSO4+2H2O

[0264] 2. 2HLAS+Mg(OH)2→Mg(LAS)2+2H2O

[0265] 3. HLAS+NaOH→NaLAS+H2O

[0266] Neutralized with NaOH only (paste / sheet K below)

[0267] 1.H2SO4+2NaOH→Na2SO4+2H2O

[0268] 2. HLAS+NaOH→NaLAS+H2O

[0269] All eleven pastes were prepared in a beaker with an overhead stirrer to speed up the neutralization reaction and paste homogenization. The impeller speed was varied between 300 RPM and 1000 RPM, depending on the gradual thickness of the paste observed as the HLAS was neutralized to LAS. For all pastes listed in the table below, the order of addition was as follows:

[0270] For the paste containing Mg(LAS)2 (AJ):

[0271] 1. Water (liquid)

[0272] 2.Mg(OH)2(solid)

[0273] 3. HLAS (liquid)

[0274] 4. NaOH (aqueous solution) (if present)

[0275] 5. Polycarboxylate polymer (liquid)

[0276] 6.Sodium sulfate (solid)

[0277] For pastes (K) without Mg(LAS)2:

[0278] 1. Water (liquid)

[0279] 2.NaOH (aqueous solution)

[0280] 3. HLAS (liquid)

[0281] 4. Polycarboxylate polymer (liquid)

[0282] 5. Sodium sulfate (solid)

[0283] Table 1-A

[0284]

[0285] When prepared, the LAS paste is applied and spread onto a silicone baking mat in a layer with a thickness of up to 5 mm. The silicone baking mat with the applied LAS paste is then placed in an oven set at 110°C and allowed to dry for 16 hours. After 16 hours, the LAS paste is removed from the silicone baking mat as large flakes. These large flakes are then ground on a sieve with a hole size of 1180 μm, optionally with sieves with hole sizes of 600 μm and 425 μm below the sieve, with a pan at the bottom. In this way, dry flakes with particle sizes of 0 μm-425 μm, 425 μm-600 μm, 600 μm-1180 μm and 0 μm-1180 μm are obtained.

[0286] Table 1-B

[0287]

[0288] All eleven sheets were placed in a unique combined solid laundry detergent composition matrix, the composition of which is listed in Table 1-C. Each composition matrix was combined via enclosing the composition matrix in nonwoven polyvinyl alcohol. All eleven combined solid laundry detergent composition matrices were placed in a climate chamber at 25°C and 60% relative humidity for 12 weeks. After 12 weeks, the free-flowing properties of the solid laundry detergent composition inside each combined matrix were evaluated. After evaluation, the relative humidity of the solid laundry detergent composition was measured to be (60 ± 2)% RH, thus indicating that equilibrium conditions were achieved.

[0289] Table 1-C

[0290] raw material Raw material activity [wt%] Raw material fraction in the composition [wt %] LAS slices 90.0 45.4 Sodium Percarbonate 87.6 30.2 TAED 92.0 9.00 Zeolite 80.0 3.45 Polycarboxylate 92.0 2.10 Carboxymethyl cellulose 65.0 1.80 Sodium sulfate 100.0 8.05

[0291] In order to evaluate the physical flow properties of the powder composition matrix after storage at 60% relative humidity, the non-woven polyvinyl alcohol was removed and the powder was poured on a sieve with a hole size of 2 mm. After shaking the sieve for 30 seconds, the mass on the sieve was measured, and the mass passing through the sieve was measured. The results are listed in Table 1-D.

[0292] Since the powders in each combined matrix contained 45.4 wt% LAS flakes, any amount of powder less than 45.4 wt% on the 2 mm sieve means that not all LAS flakes contribute to consolidated particles with a size greater than 2 mm. Thus, the present invention contemplates flakes present in any powder where less than 45.4 wt% of the powder is retained on the 2 mm sieve.

[0293] Table 1-D

[0294]

[0295] It was observed that flakes A, B, C, D, E, F and G all resulted in a powder matrix having a fraction of less than 45.4% of its total mass retained on the 2 mm sieve. Flakes H, I, J and K all produced a powder matrix having a fraction of more than 45.4% of its total mass retained on the 2 mm sieve.

[0296] Example 2

[0297] Two linear alkylbenzene sulfonate (LAS) anionic detersive surfactant flakes were prepared as described in Example 1. For these flakes and their paste precursors, the polycarboxylate polymer was omitted. One of the flakes and its paste precursor used a HLAS source in which the unsulfonated linear alkylbenzene (LAB) precursor was classified as having a high content of 2-phenyl isomers, while the other flake used a HLAS source in which the LAB precursor was classified as having a low content of 2-phenyl isomers.

[0298] Table 2-A

[0299]

[0300] Table 2-B

[0301]

[0302] The two sheets were placed in a unique combined solid laundry detergent composition matrix, the composition of which is listed in Table 2-C. Each composition matrix was combined via enclosing the composition matrix in nonwoven polyvinyl alcohol. The two combined solid laundry detergent composition matrices were placed in a climate chamber at 25°C and 60% relative humidity for 14 weeks. After 14 weeks, the free-flowing properties of the solid laundry detergent composition inside each combined matrix were evaluated. After evaluation, the relative humidity of the solid laundry detergent composition was measured to be (60 ± 2)% RH, thus indicating that equilibrium conditions were achieved.

[0303] Table 2-C

[0304] raw material Raw material activity [wt%] Raw material fraction in the composition [wt %] LAS slices 90.0 45.4 Sodium Percarbonate 87.6 30.2 TAED 92.0 9.00 Zeolite 80.0 3.45 Polycarboxylate 92.0 2.10 Carboxymethyl cellulose 65.0 1.80 Sodium sulfate 100.0 8.05

[0305] In order to evaluate the physical flow properties of the powder composition matrix after storage at 60% relative humidity, the non-woven polyvinyl alcohol was removed and the powder was poured on a sieve with a hole size of 2 mm. After shaking the sieve for 30 seconds, the mass on the sieve was measured, and the mass passing through the sieve was measured. The results are listed in Table 2-D.

[0306] Table 2-D

[0307] Thin slice E-L2Ph E-H2Ph 2-phenyl isomer content [weight % of total isomer mass] 15-20 25-30 <![CDATA[Mass ratio (MgLAS2 / NaLAS)[-]]]> 1.49 1.49 Mass on 2mm sieve [g] 10.7 21.7 Mass passing 2mm sieve [g] 38.0 28.3 Powder fraction on 2 mm sieve [wt %] 22.0 43.4

[0308] It was observed that flakes containing the lower-2-phenyl isomer performed particularly well.

[0309] Example 3

[0310] For flakes A, B, C, D, E, F and K prepared as in Example 1, the dissolution kinetics were analyzed via UV-visible spectrophotometry. For each measurement, 0.44 grams of "fresh" flakes were dissolved in 800 mL of deionized water under mechanical stirring. A sample of each flake was stirred for 24 hours and then a wavelength scanning experiment was performed to obtain the absorbance value of each flake in the wavelength range of 190 nm-400 nm. Table 3-A shows the absorbance (in absorbance units, AU) of each flake at a wavelength of 250 nm.

[0311] Table 3-A

[0312] Thin slice UV-Visible absorbance at 250nm [AU] A 0.46 B 0.51 C 0.53 D 0.54 E 0.55 F 0.54 K 0.54

[0313] The absorbance of different samples of each sheet was then measured at a wavelength of 250 nm at intervals of 1, 2, 5 and 10 minutes over a period of 10 minutes. The measured absorbance values ​​were then calculated as the percentage of the dissolution rate measured after 24 hours, as listed in Table 3-A. The results are shown in Table 3-B.

[0314] Table 3-B

[0315]

[0316] *A = "UV-Visible Spectrophotometric Absorbance at 250 nm [AU]"

[0317] **D = "Dissolution rate percentage compared to the 24-hour dissolution rate in Table 3-A [%]"

[0318] It was observed that after 10 minutes, sheets B, C, D, E, F and K had a dissolution percentage of at least 60% of their respective 24 hour dissolution values.

[0319] The dimensions and values ​​disclosed herein are not to be understood as being strictly limited to the exact numerical values ​​cited. Instead, unless otherwise indicated, each such dimension is intended to represent the stated value and a functionally equivalent range around that value. For example, a dimension disclosed as "40 mm" is intended to mean "about 40 mm".

Claims

1. A solid linear alkylbenzene sulfonate anionic detersive surfactant particle suitable for use in a laundry detergent composition, wherein the particle comprises from greater than 50% to 100% by weight of a polycationic salt of a linear alkylbenzene sulfonate comprising both magnesium cations and sodium cations, wherein the weight ratio of the magnesium salt of the linear alkylbenzene sulfonate to the sodium salt of the linear alkylbenzene sulfonate is in the range of 0.6:1 to 9:

1. 2 . The particle according to claim 1 , wherein the weight ratio of the magnesium salt of the linear alkylbenzene sulfonic acid to the sodium salt of the linear alkylbenzene sulfonic acid is in the range of 0.9:1 to 7:

1.

3. A particle according to any preceding claim, wherein the weight ratio of the magnesium salt of linear alkylbenzene sulfonic acid to the sodium salt of linear alkylbenzene sulfonic acid is in the range of 1:1 to 5:

1.

4. A particle according to any preceding claim, wherein the particle comprises from 80% to 95% by weight of the polycationic salt of the linear alkylbenzene sulfonic acid.

5. A particle according to any preceding claim, wherein the particle comprises from greater than 0% to 40% by weight of an inorganic salt.

6. The particle according to claim 5, wherein the inorganic salt is selected from the group consisting of carbonates, chlorides, magnesium salts, silicates, sulfates, zeolite salts, and any combination thereof.

7. The particle according to any one of claims 5 to 6, wherein the inorganic salt is selected from the group consisting of magnesium carbonate, magnesium sulfate, sodium carbonate, sodium sulfate, and any combination thereof.

8. A particle according to any preceding claim, wherein the particle comprises from greater than 0% to 20% by weight polymer.

9. The particle according to claim 8, wherein the polymer is selected from the group consisting of modified polysaccharide polymers, polycarboxylate polymers, polyethylene glycol polymers, polyethylene imine polymers, silicone polymers, terephthalate polymers, other polyester polymers, and any combination thereof.

10. A particle according to any preceding claim wherein the linear alkylbenzene sulphonic acid has a 2-phenyl isomer content of from 15% to 20% by weight.

11. A particle according to any preceding claim, wherein the particle is in the form of flakes.

12. A laundry detergent composition comprising a particle according to any preceding claim.

13. A method for preparing particles according to any one of claims 1 to 11, wherein the polycationic salt of a linear alkylbenzene sulfonic acid is obtained by the following process steps: (a) partially neutralizing linear alkylbenzene sulfonic acid with a magnesium neutralizer to form partially magnesium-neutralized linear alkylbenzene sulfonic acid; and (b) completely neutralizing the partially magnesium-neutralized linear alkylbenzene sulfonic acid from step (a) with a sodium neutralizer to form a polycationic salt of the linear alkylbenzene sulfonic acid comprising both magnesium cations and sodium cations.

14. The method of claim 13, wherein the magnesium neutralizing agent is selected from the group consisting of magnesium bicarbonate, magnesium carbonate, basic magnesium carbonate, magnesium hydroxide, and any combination thereof.

15. The method according to any one of claims 13 to 14, wherein the sodium neutralizing agent is selected from the group consisting of sodium bicarbonate, sodium carbonate, sodium hydroxide, and any combination thereof.

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