EP0290209A1 - Matière sèche par atomisation pour des compositions détergentes - Google Patents
Matière sèche par atomisation pour des compositions détergentes Download PDFInfo
- Publication number
- EP0290209A1 EP0290209A1 EP88303910A EP88303910A EP0290209A1 EP 0290209 A1 EP0290209 A1 EP 0290209A1 EP 88303910 A EP88303910 A EP 88303910A EP 88303910 A EP88303910 A EP 88303910A EP 0290209 A1 EP0290209 A1 EP 0290209A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- weight
- spray
- ingredients
- nonionic surfactant
- sodium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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- 239000003599 detergent Substances 0.000 title claims abstract description 41
- 239000000203 mixture Substances 0.000 title claims abstract description 32
- 239000000463 material Substances 0.000 title claims abstract description 20
- 239000002736 nonionic surfactant Substances 0.000 claims abstract description 54
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 46
- 235000019832 sodium triphosphate Nutrition 0.000 claims abstract description 31
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 23
- 239000004615 ingredient Substances 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 239000003945 anionic surfactant Substances 0.000 claims abstract description 7
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 6
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 125000000129 anionic group Chemical group 0.000 claims abstract description 5
- 229920000642 polymer Polymers 0.000 claims abstract description 3
- 235000011837 pasties Nutrition 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 4
- -1 for example Substances 0.000 abstract description 10
- 239000000843 powder Substances 0.000 description 29
- 239000012876 carrier material Substances 0.000 description 25
- 235000017550 sodium carbonate Nutrition 0.000 description 20
- 238000004090 dissolution Methods 0.000 description 14
- 238000001694 spray drying Methods 0.000 description 12
- 239000002585 base Substances 0.000 description 11
- 239000002002 slurry Substances 0.000 description 10
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 7
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 7
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 235000014113 dietary fatty acids Nutrition 0.000 description 5
- 239000000194 fatty acid Substances 0.000 description 5
- 229930195729 fatty acid Natural products 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- 239000011324 bead Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000344 soap Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- 230000000740 bleeding effect Effects 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 150000004665 fatty acids Chemical class 0.000 description 3
- 150000003138 primary alcohols Chemical class 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 description 3
- 235000011152 sodium sulphate Nutrition 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 2
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000007844 bleaching agent Substances 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000007580 dry-mixing Methods 0.000 description 2
- 238000011067 equilibration Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- 229920005646 polycarboxylate Polymers 0.000 description 2
- 150000003333 secondary alcohols Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- 244000020551 Helianthus annuus Species 0.000 description 1
- 235000003222 Helianthus annuus Nutrition 0.000 description 1
- 229910000503 Na-aluminosilicate Inorganic materials 0.000 description 1
- 235000019484 Rapeseed oil Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229920006243 acrylic copolymer Polymers 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 235000015278 beef Nutrition 0.000 description 1
- 150000001860 citric acid derivatives Chemical class 0.000 description 1
- 235000019864 coconut oil Nutrition 0.000 description 1
- 239000003240 coconut oil Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 235000011180 diphosphates Nutrition 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000013020 final formulation Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000008233 hard water Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 125000001165 hydrophobic group Chemical group 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical class OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- MPQXHAGKBWFSNV-UHFFFAOYSA-N oxidophosphanium Chemical group [PH3]=O MPQXHAGKBWFSNV-UHFFFAOYSA-N 0.000 description 1
- 239000002304 perfume Substances 0.000 description 1
- 235000019271 petrolatum Nutrition 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920005996 polystyrene-poly(ethylene-butylene)-polystyrene Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000429 sodium aluminium silicate Substances 0.000 description 1
- 235000012217 sodium aluminium silicate Nutrition 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000008234 soft water Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000003760 tallow Substances 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
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
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/10—Carbonates ; Bicarbonates
-
- 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
- C11D11/00—Special methods for preparing compositions containing mixtures of detergents
- C11D11/02—Preparation in the form of powder by spray drying
-
- 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
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/06—Phosphates, including polyphosphates
Definitions
- the present invention relates to a material prepared by spray-drying which is suitable for use as a carrier for mobile ingredients, for example, liquid nonionic surfactants, in detergent and cleaning compositions.
- the carrier material of the invention consists essentially of sodium tripolyphosphate and sodium carbonate.
- nonionic surfactants in detergent powders by spraying a liquid, liquefied or dissolved nonionic surfactant onto a carrier material which may itself be a detergent base powder containing most or all of the other desired ingredients of the composition, or which may be a wholly or predominantly inorganic carrier material that can subsequently be dry-mixed or granulated with other desired ingredients to form a detergent composition. Similar methods are used to incorporate other mobile liquid ingredients, for example, lather suppressors, in detergent powders.
- GB 1 579 261 discloses spray-dried base beads comprising, by weight, 7% sodium silicate, 78% sodium tripolyphosphate, and 15% sodium carbonate;
- CA 978 821 discloses spray-dried base beads comprising, by weight, 13% sodium silicate, 42.9% sodium tripolyphosphate, 19.5% sodium carbonate and 24.7% sodium sulphate.
- the base beads disclosed in both documents are subsequently oversprayed with nonionic surfactant.
- the present invention accordingly provides a porous spray-dried material suitable for carrying mobile ingredients in a detergent composition, wherein the solids content consists of
- the invention further provides a detergent composition or component therefor, comprising
- the solids of the porous carrier material of the invention consist wholly or predominantly (to an extent of at least 90% by weight) of sodium tripolyphosphate (STP) and sodium carbonate in a weight ratio of from 0.1:1 to 1.5:1, preferably from 0.25:1 to 1.5:1.
- STP sodium tripolyphosphate
- the proportion of sodium carbonate is thus relatively high, and since the absorptivity of sodium carbonate for liquids such as nonionic surfactants is low it is surprising that material in accordance with the invention containing as little as 20% STP (ratio 0.25:1) has an absorptivity value approaching that of STP itself.
- Carrier materials in accordance with the invention when treated with liquid or liquefied nonionic surfactants, form free-flowing powders showing little tendency to nonionic surfactant bleeding and having high dissolution rates in water. Such materials are therefore highly suitable as detergent compositions in their own right, or as components (hereinafter referred to as adjuncts) for detergent compositions.
- adjuncts for detergent compositions.
- the term "adjunct" will be used to refer to combinations of the porous carrier material and a liquid or pasty detergent component, even though such combinations may be usable as such as detergent or cleaning compositions.
- a ratio of STP to carbonate of from 0.7:1 to 1:1 is of particular interest because especially free flowing powders are obtained, but the whole ratio range of 0.1:1 to 1.5:1 is useful.
- the porous carrier material is prepared by spray-drying an aqueous slurry.
- the slurry is preferably prepared at a temperature not exceeding 70°C, to allow the growth of small, fully hydrated STP crystals; a temperature of 60-70°C is preferred.
- the STP is added first to the slurry-making vessel and a period of at least 5 minutes is allowed to elapse before the sodium carbonate is added.
- the temperature is preferably raised to 75-85°C and the slurry mixed for a further 10-20 minutes before it is conveyed to the spray-drying tower.
- Spray-drying is preferably carried out so as to give a powder having a moisture content of 10-15%. Drying further increases porosity.
- minor amounts of other materials may be included in the slurry, or subsequently admixed, provided that these materials do not interfere with the absorptivity of the carrier material or the non-bleeding properties and rapid dissolution of the subseqently prepared adjunct, and provided that the total amount of such materials does not amount to more than 10% by weight of the porous carrier material.
- materials that may be incorporated include the following.
- the adjunct of the invention contains from 15 to 40% by weight of a liquid or pasty detergent component sorbed onto from 60 to 85% by weight of the porous carrier material of the invention.
- liquid or pasty detergent component is intended to encompass any liquid or pasty ingredient that may usefully be incorporated in a detergent composition, and does not necessarily imply surface activity.
- the liquid or pasty detergent component will generally be wholly or predominantly organic, but need not be.
- components that may be carried in the adjunct of the invention are anionic surfactants, nonionic surfactants, fabric softening amines, and lather suppressors, for examples, alkyl phosphate/petroleum jelly, silicone oil/hydrophobic silica.
- the adjunct of the invention is prepared by treating the porous carrier material of the invention with the liquid or pasty detergent component.
- a preferred method for preparing the adjunct is to spray the component, after melting or solvent dissolution if necessary, onto the carrier material.
- the carrier material is advantageously agitated in apparatus, for example, a rotating drum, that continually presents a changing surface of powder to the sprayed liquid; and the spray nozzle is advantageously angled so that liquid that penetrates the powder curtain falls on further powder rather than the shell of the drum itself.
- Adjuncts in which the liquid or pasty detergent component is a nonionic surfactant represent a preferred embodiment of the invention.
- nonionic surfactants which may be used include in particular the reaction products of compounds having a hydrophobic group and a reactive hydrogen atom, for example aliphatic alcohols, acids, amides or alkyl phenols with alkylene oxides, especially ethylene oxide either alone or with propylene oxide.
- Specific nonionic detergent compounds are alkyl (C6-C22) phenol-ethylene oxide condensates, generally 5 to 25 EO, ie 5 to 25 units of ethylene oxide per molecule, the condensation products of aliphatic (C8-C18) primary or secondary linear or branched alcohols with ethylene oxide, generally 5 to 40 EO, and products made by condensation of ethylene oxide with the reaction products of propylene oxide and ethylenediamine.
- Other so-called nonionic detergent compounds include long chain tertiary amine oxides, long chain tertiary phosphine oxides and dialkyl sulphoxides.
- the invention is especially of applicability to adjuncts carrying nonionic surfactant of which at least 50% by weight has an average of less than 6 moles of ethylene oxide per mole, which are difficult to incorporate by spray-drying.
- the invention may also be used to incorporate nonionic surfactants with greater amounts of ethylene oxide per mole.
- porous carrier materials of the invention intended to carry nonionic surfactant advantageously contain a low level, for example, 0.5 to 2% by weight, of nonionic surfactant incorporated via the slurry. This greatly increases the rate at which nonionic surfactant is absorbed by the spray-dried carrier material.
- An adjunct of the present invention containing nonionic surfactant is useful in its own right as a detergent or cleaning composition. Alternatively, however, it may be incorporated in a detergent powder containing other ingredients, in particular, a spray-dried detergent powder.
- the adjunct preferably has a bulk density of at least 0.45 g/ml, more preferably at least 0.55 g/ml, and desirably at least 0.65 g/ml.
- An adjunct of high bulk density can thus be mixed with a spray-dried base powder of high bulk density, for example, at least 0.45 g/ml and preferably at least 0.55 g/ml, to give a final product of high bulk density.
- the adjuncts of the invention also have excellent flow properties, so that admixture of such an adjunct with a detergent base powder will not generally give a final product having worse flow properties than the base powder.
- a nonionic surfactant adjunct in accordance with the invention is suitably incorporated in a particulate detergent composition in an amount of from 5 to 25% by weight, preferably from 10 to 20% by weight.
- the amount of nonionic surfactant incorporated in the detergent powder by means of the adjunct may range, for example, from 2 to 10% by weight.
- the final particulate detergent composition preferably has a bulk density of at least 0.45 g/ml, more preferably at least 0.55 g/ml.
- the adjunct is suitably incorporated in the composition by dry mixing.
- the particulate detergent composition may contain all or any of the conventional ingredients. It will generally contain one or more anionic and/or nonionic surfactants and one or more detergency builders.
- Anionic surfactants are well known to those skilled in the detergents art. Examples include alkylbenzene sulphonates, particularly sodium linear C8-C15 alkylbenzene sulphonates having an average chain length of C11-C13; primary and secondary alcohol sulphates, particularly sodium C12-C15 primary alcohol sulphates; olefin sulphonates; alkane sulphonates; and fatty acid ester sulphonates.
- soaps of fatty acids are preferably sodium soaps derived from naturally occurring fatty acids, for example the fatty acids from coconut oil, beef tallow, sunflower or hardened rapeseed oil.
- the particulate detergent composition may also include one or more nonionic surfactants, in addition to any nonionic surfactant incorporated by way of the adjunct of the invention.
- suitable nonionic surfactants are the primary and secondary alcohol ethoxylates, especially the C12-C15 primary and secondary alcohols ethoxylated with an average of from 5 to 20 moles of ethylene oxide per mole of alcohol.
- the STP and sodium carbonate present in the adjunct of the invention act as detergency builders, but will not generally be present in a sufficient amount to provide adequate building.
- Preferred builders for inclusion in the particulate detergent composition include phosphates, for example, orthophosphates, pyrophosphates and (most preferably) tripolyphosphates.
- Non-P builders that may be present include, but are not restricted to, sodium carbonate, crystalline and amorphous aluminosilicates, soaps, sulphonated fatty acid salts, citrates, nitrilotriacetates and carboxymethyloxsuccinates.
- Polymeric builders for example, polycarboxylates such as polyacrylates, acrylic/maleic copolymers and acrylic phosphinates, may also be present, generally but not exclusively to supplement the effect of another builder such as STP or sodium aluminosilicate.
- ingredients that may be present in the base powder slurry include alkali metal silicates, antiredeposition agents, antiincrustation agents and fluorescers.
- the detergent composition of the invention may also contain various ingredients that are unsuitable for slurrying or spray-drying or that interfere with the spray-drying process, and such ingredients may be incorporated by spraying, dry-mixing or granulation.
- ingredients are enzymes; bleaches, bleach precursors, or bleach activators; inorganic salts such as sodium sulphate, as described and claimed in EP 219 328A (Unilever); or sodium silicate as described and claimed in EP 240356 (Unilever) published in October 1987; lather suppressors; perfumes; dyes; and coloured noodles or speckles.
- enzymes bleaches, bleach precursors, or bleach activators
- inorganic salts such as sodium sulphate, as described and claimed in EP 219 328A (Unilever); or sodium silicate as described and claimed in EP 240356 (Unilever) published in October 1987
- lather suppressors perfumes; dyes; and coloured noodles or speckles.
- Ten porous carrier materials (six in accordance with the invention, and four controls) were prepared by slurry-making and spray-drying.
- the inorganic salts (STP, sodium carbonate) were slurried together with 1% by weight, based on the inorganic salts, of nonionic surfactant (7EO).
- the slurries were prepared in a temperature-controlled, steam-jacketed, turbine-agitated vessel. Water was preheated to 65°C and STP then added; after 5 minutes sodium carbonate (light soda ash ex ICI) was added and the temperature controlled at 80°C. Mixing was continued for a further 15 minutes, then the slurries were conveyed to a countercurrent spray-drying tower, where they were spray-dried at an inlet gas temperature of 300°C to form powders having moisture contents of about 12%.
- STP sodium carbonate
- the carrier materials according to the invention contained STP and sodium carbonate in ratios ranging from 0.1:1 to 1.5:1.
- the controls were STP alone (A), sodium carbonate alone (B), and STP and sodium carbonate in ratios of 2.2:1 (C) and 0.05:1 (D) which are both outside the limits of this invention.
- the bulk density, flow rate and absorptivity for nonionic surfactant (4EO) were measured and the values are shown in Table 1.
- the flow rates of the powders ranged from 75 to 109 ml/s, indicating that all were free-flowing and non-cohesive.
- the nonionic surfactant absorptivity was measured by titrating each carrier with liquid nonionic surfactant (4EO) until the nonionic surfactant was no longer retained strongly by the particles: failure to retain surfactant was detected by the staining of a filter paper pressed against the powder. Values of 0.30-0.36 ml/g were obtained for the carriers 1 to 6 according to the invention, indicating a good capacity for liquid carrying. It will be seen that, surprisingly, the values for the carriers 1 to 6 according to the invention were not much lower than the value for the control A (STP alone), despite the fact that the control B (sodium carbonate alone) had a much lower value. A number of these values were distinctly higher than the values predicted by linear interpolation.
- Nonionic surfactant adjuncts were prepared from each of the ten carriers by spraying 1 part of nonionic surfactant (4EO) onto 4 parts of carrier, while the carrier was mixed in a rotary mixer. After spray-on, a period of 24 hours was allowed for equilibration, then the properties listed in Table 2 were measured.
- adjuncts 1 to 6 had nonionic surfactant bleeding figures well below those predicted by linear interpolation.
- Adjuncts 1 to 5 were free-flowing powders of high bulk density.
- Adjunct 6 had a slightly poorer flow rate whose acceptability was borderline while control D had an even lower flow rate and also displayed poor retention of surfactant.
- the dissolution rate of each adjunct was determined by adding a fixed weight of the adjunct to a vessel containing water at 20°C in which constant agitation could be maintained, and by measuring the increase of electrical conductivity with time. The dissolution time was taken as that at which 95% of the equilibrium conductance was reached. As the carrier dissolved, nonionic surfactant was released: this was indicated by an increase in turbidity of the solution. Measurements were made on 180-250 ⁇ fractions of the adjuncts, in both demineralised and 48°H (French) water: no significant differences between the dissolution times in hard and soft water were observed, and mean results are presented in Table 2.
- adjuncts 1 to 6 dissolved faster than would be predicted by linear interpolation.
- Adjuncts 1 and 5 actually had shorter dissolution times than either of the controls A and B.
- Control C displayed a dissolution time of borderline acceptability, slower than any of adjuncts 1 to 6.
- control C showed good ability to carry nonionic surfactant with a borderline dissolution rate
- control D had poor ability to carry nonionic surfactant but the adjuncts 1 to 6 had a good combination of properties better than predicted by linear interpolation between the values for controls A and B.
- Adjuncts were prepared to the following compositions:
- adjuncts were each prepared by spray-drying a porous inorganic carrier powder, and then nonionic surfactant was incorporated by spray-on to the powder in a batch mixer.
- a spray-dried base detergent powder was prepared to the following formulation:
- the powder was free-flowing and had a bulk density of 0.6-0.65 g/ml.
- Carrier materials were prepared by a procedure similar to that for Examples 1 to 6 except that nonionic surfactant (7EO) was not always included.
- Nonionic surfactant adjuncts were then prepared by spraying 1 part of nonionic surfactant (4EO) onto 4 parts of each carrier, in a rotary mixer, and allowing a period of 24 hours for equilibration.
- compositions of the carrier materials are set out in Table 3 below together with properties of the carrier materials and adjuncts determined as described for Examples 1 to 6. Also included in this table is a comparative material, designated E.
- Comparative composition E and Example 9 demonstrate the effect of silicate.
- the ratio of STP to sodium carbonate is 0.7:1 as for Example 3.
- Ability to carry surfactant is satisfactory, and flow rate shows an improvement, especially in the case of composition E with over 10% silicate.
- the inclusion of silicate has a detrimental effect on dissolution time, and that of Example 9 is of borderline acceptability.
- Examples 10 and 11 demonstrate incorporation of low levels of other materials without detriment to carrier or adjunct properties.
- Composition F reproduces Example 2 in British patent 1579261.
- the ratio of STP:carbonate is 5.2:1.
- the rate of dissolution is much slower than observed with Examples of this invention.
- Composition G reproduces Example 1 in Canadian patent 978821.
- the ratio of STP:carbonate is 2.2:1.
- the STP and carbonate constitute less than 90% of the solids content of the composition.
- the carrier had poor ability to absorb and retain nonionic surfactant and the adjunct had a slow rate of dissolution.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Detergent Compositions (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8710293 | 1987-04-30 | ||
GB878710293A GB8710293D0 (en) | 1987-04-30 | 1987-04-30 | Spray-dried material |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0290209A1 true EP0290209A1 (fr) | 1988-11-09 |
Family
ID=10616648
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88303910A Ceased EP0290209A1 (fr) | 1987-04-30 | 1988-04-29 | Matière sèche par atomisation pour des compositions détergentes |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0290209A1 (fr) |
AU (1) | AU600123B2 (fr) |
BR (1) | BR8802053A (fr) |
GB (1) | GB8710293D0 (fr) |
TR (1) | TR25690A (fr) |
ZA (1) | ZA883077B (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2616156A1 (fr) * | 1987-06-05 | 1988-12-09 | Colgate Palmolive Co | Composition detergente en poudre comprenant un silicate pour le lavage automatique de la vaisselle, son procede de fabrication et son procede d'utilisation |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1579261A (en) * | 1976-02-26 | 1980-11-19 | Colgate Palmolive Co | Detergent compositions and components thereof |
EP0061226A1 (fr) * | 1981-03-23 | 1982-09-29 | THE PROCTER & GAMBLE COMPANY | Compositions détergentes séchées par atomisation |
EP0084657A1 (fr) * | 1981-12-28 | 1983-08-03 | Henkel Kommanditgesellschaft auf Aktien | Agents de lavage granulaires très moussants séchés par pulvérisation avec une stabilité élevée des granulations et procédé pour sa fabrication |
US4441881A (en) * | 1982-09-07 | 1984-04-10 | Lever Brothers Company | Detergent compositions containing ethoxylated fatty alcohols with narrow ethylene oxide distributions |
EP0219328A2 (fr) * | 1985-10-14 | 1987-04-22 | Unilever Plc | Composition détergente et son procédé de préparation |
EP0221776A2 (fr) * | 1985-11-01 | 1987-05-13 | Unilever Plc | Compositions détergentes, parties constituantes et leurs procédés de préparation |
-
1987
- 1987-04-30 GB GB878710293A patent/GB8710293D0/en active Pending
-
1988
- 1988-04-25 TR TR88/0303A patent/TR25690A/xx unknown
- 1988-04-26 AU AU15158/88A patent/AU600123B2/en not_active Ceased
- 1988-04-28 BR BR8802053A patent/BR8802053A/pt not_active IP Right Cessation
- 1988-04-29 ZA ZA883077A patent/ZA883077B/xx unknown
- 1988-04-29 EP EP88303910A patent/EP0290209A1/fr not_active Ceased
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1579261A (en) * | 1976-02-26 | 1980-11-19 | Colgate Palmolive Co | Detergent compositions and components thereof |
EP0061226A1 (fr) * | 1981-03-23 | 1982-09-29 | THE PROCTER & GAMBLE COMPANY | Compositions détergentes séchées par atomisation |
EP0084657A1 (fr) * | 1981-12-28 | 1983-08-03 | Henkel Kommanditgesellschaft auf Aktien | Agents de lavage granulaires très moussants séchés par pulvérisation avec une stabilité élevée des granulations et procédé pour sa fabrication |
US4441881A (en) * | 1982-09-07 | 1984-04-10 | Lever Brothers Company | Detergent compositions containing ethoxylated fatty alcohols with narrow ethylene oxide distributions |
EP0219328A2 (fr) * | 1985-10-14 | 1987-04-22 | Unilever Plc | Composition détergente et son procédé de préparation |
EP0221776A2 (fr) * | 1985-11-01 | 1987-05-13 | Unilever Plc | Compositions détergentes, parties constituantes et leurs procédés de préparation |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2616156A1 (fr) * | 1987-06-05 | 1988-12-09 | Colgate Palmolive Co | Composition detergente en poudre comprenant un silicate pour le lavage automatique de la vaisselle, son procede de fabrication et son procede d'utilisation |
BE1003812A5 (fr) * | 1987-06-05 | 1992-06-23 | Colgate Palmolive Co | Composition detergente en poudre comprenant un silicate pour le lavage automatique de la vaisselle, son procede de fabrication et son procede d'utilisation. |
Also Published As
Publication number | Publication date |
---|---|
GB8710293D0 (en) | 1987-06-03 |
AU1515888A (en) | 1988-11-03 |
ZA883077B (en) | 1989-12-27 |
BR8802053A (pt) | 1988-11-29 |
TR25690A (tr) | 1993-06-15 |
AU600123B2 (en) | 1990-08-02 |
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