EP0728187B1 - Process for the production of a detergent composition - Google Patents

Process for the production of a detergent composition Download PDF

Info

Publication number
EP0728187B1
EP0728187B1 EP95900225A EP95900225A EP0728187B1 EP 0728187 B1 EP0728187 B1 EP 0728187B1 EP 95900225 A EP95900225 A EP 95900225A EP 95900225 A EP95900225 A EP 95900225A EP 0728187 B1 EP0728187 B1 EP 0728187B1
Authority
EP
European Patent Office
Prior art keywords
fluorescer
mixture
composition
component
process according
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.)
Expired - Lifetime
Application number
EP95900225A
Other languages
German (de)
French (fr)
Other versions
EP0728187A1 (en
Inventor
Janette Wilson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unilever PLC
Unilever NV
Original Assignee
Unilever PLC
Unilever NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10744991&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0728187(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Unilever PLC, Unilever NV filed Critical Unilever PLC
Publication of EP0728187A1 publication Critical patent/EP0728187A1/en
Application granted granted Critical
Publication of EP0728187B1 publication Critical patent/EP0728187B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • C11D3/40—Dyes ; Pigments
    • C11D3/42—Brightening agents ; Blueing agents
    • 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 ; Methods for using cleaning compositions
    • C11D11/0082—Special methods for preparing compositions containing mixtures of detergents ; Methods for using cleaning compositions one or more of the detergent ingredients being in a liquefied state, e.g. slurry, paste or melt, and the process resulting in solid detergent particles such as granules, powders or beads
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/06—Powder; Flakes; Free-flowing mixtures; Sheets
    • C11D17/065—High-density particulate detergent compositions

Definitions

  • This invention relates to a process for the production of a detergent composition.
  • this invention relates to a process for the production of a high bulk density detergent composition containing a fluorescer.
  • Detergent powders typically include components in addition to the detergent-active materials necessary for detergency which provide the powder with characteristics which may be viewed as desirable by the market for example perfume and fluorescer. Fluorescers have been used for many years in conventional spray-dried powders to give improved whiteners.
  • the fluorescer material is typically incorporated into the slurry of components which is to be spray-dried to produce the powder. Examples of this process are given in EP-A-352 892, Chemical Abstracts 109, 195, 198 and DE-A-2856687.
  • Production of a detergent composition by a mixing process typically involves contacting and mixing the liquid components with the solid components of the composition so that the liquid binds the solid material thereby to form composition particles. With further mixing the particles increase in size to form granules.
  • the ratio of liquids to solids has to be sufficiently high to promote binding but not so high that discrete particles are not obtained.
  • fluorescers have been incorporated into the powder as a solid material in the mixing/densification step.
  • fluorescers may have an undesirable colour. Incorporating such fluorescers in solid form may impair the colour quality of the final powder.
  • high bulk density powders having excellent colour properties may be produced by incorporating a fluorescer into a liquid component of the detergent composition to produce a pre-mix of the fluorescer which is then combined with solid components in a mixing step to produce the particulate composition.
  • a process for the production of a high bulk density particulate detergent composition or component thereof containing a fluorescer which comprises mixing the fluorescer with a liquid component of the composition or component, said liquid component consisting essentially of a nonionic surfactant and water and optionally fatty acid, to form a fluorescer mixture, and mixing the said fluorescer mixture with a solid component of the composition or component whereby a particulate detergent composition or component is produced.
  • High bulk density compositions having a bulk density of at least 750g/l may be produced by the present invention.
  • the process of the present invention may be a continuous or a batch process as desired.
  • the components of the detergent composition will be selected to provide the desired characteristics and will generally include a surfactant and a builder in addition to the fluorescer.
  • the composition comprises at least one liquid component in order to bind the solid components together.
  • the fluorescer is mixed with a liquid component, to form a fluorescer mixture which may be a slurry, dispersion or suspension. Agitation may be necessary in such cases to avoid undesirable sedimentation. It is especially preferred that the fluorescer mixture is a solution as particularly good powder colour may be secured.
  • the fluorescer mixture comprises a liquid nonionic surfactant. Further, the fluorescer mixture consists of a mixture of a fluorescer, a nonionic surfactant and water and optionally a fatty acid.
  • Suitable nonionic surfactants have an average degree of alkoxylation of 3 or more, preferably 5 or more, and desirably 20 or less.
  • the fluorescer mixture is a solution to facilitate homogeneous dispersion of the fluorescer through the composition and the nonionic suitably has an average degree of alkoxylation of 6 or more.
  • Ethoxylated alcohols are especially preferred. Suitable examples include SYNPERONIC A3, SYNPERONIC A7 ex ICI (SYNPERONIC is a Trademark) and coconut oil ethoxylates having an average degree of ethoxylation of 6.5.
  • examples of other liquid components which may be employed with the nonionic surfactant include polyethylene glycols, for example PEG 1500, and glycerol.
  • the fluorescer may comprise a fluorescer known in the art, such as a biphenyl compound for example a distyryl biphenyl compound.
  • a fluorescer known in the art such as a biphenyl compound for example a distyryl biphenyl compound.
  • An especially preferred fluorescer is TINOPAL CBS-X ex Ciba Geigy (TINOPAL is a trademark).
  • the fluorescer is suitably present in the composition in an amount of 0.001 to 1%, preferably 0.005 to 0.5%, more preferably 0.01% to 0.4%, especially 0.01 to 0.25% by weight based on the total composition.
  • the liquid component and fluorescer are suitably present in the fluorescer mixture in a ratio of 10:0.01 to 5 by weight preferably 10: 0.06 to 4 and more preferably 10:0.1 to 4.
  • An especially preferred fluorescer mixture comprises a nonionic surfactant, for example SYNPERONIC A7 ex ICI, water and a fluorescer, for example TINOPAL CBS-X.
  • the nonionic surfactant and water are present in a weight ratio of 50:1 to 1:10, preferably 20:1 to 3:8 and more preferably 10:1 to 3:8. Superior powder whiteness (lower 'b' value) is obtained at higher levels of nonionic in the fluoroescer mixture.
  • the fluorescer suitably represents 1 to 25%, preferably 5 to 15% and more preferably 6 to 12% by weight of the fluorescer mixture.
  • fluorescers are included in the composition to improve fabric whiteness, thus obviating the need for undesirably high levels of coloured fluorescer, for example TINOPAL CBS-X.
  • a dimorpholino fluorescer is present in the composition together with the powder fluorescer.
  • the fluorescer mixture is suitably prepared by mixing the fluorescer with the liquid component with agitation to obtain preferably a solution.
  • the fluorescer is mixed with the nonionic surfactant and the water is then added subsequently, or the fluorescer is added to a mixture of nonionic and water.
  • the fluorescer mixture is prepared such that sedimentation of the fluorescer and 'gelling' of the liquid at ambient temperature is avoided.
  • the solid component may comprise all of the components of the detergent composition excluding the fluorescer mixture or alternatively the solid component may comprise at least one of the said components and the other components may be incorporated into the composition during or subsequent to the mixing of the solid component and the fluorescer mixture.
  • the solid component of the composition may comprise solid particles of individual components or solid particles comprising a plurality of components hereinafter referred to as "adjuncts", Components of the detergent composition which are liquid (excluding the fluorescer mixture) may be added to the solid component during or subsequent to the mixing step or incorporated by means of an adjunct as desired.
  • the solid component may be spray-dried powder but preferably comprises materials which are not produced directly by spray-drying, especially if a high bulk density is required.
  • the mixing of the fluorescer mixture and the non-spray-dried solid is effected in a high speed mixer with the fluorescer mixture being sprayed onto the solid.
  • the particles obtained may be treated further as desired.
  • the particles may be passed directly to a cooling and/or drying step to produce finished base powder particles, to which other ingredients may then be post-mixed.
  • the particles may be passed to a second, preferably low speed, mixing step in order to increase the bulk density of the particles and optionally then cooled and/ or dried as desired.
  • the mixing and densification steps may be carried out simultaneously using a high speed mixer, suitable examples include a Shugi (trademark) Granulator, a Drais (trade mark) K-TTP 80 Granulator and the Lodige (trade mark) CB30 recycler.
  • the residence time in the mixing step is suitably about 5 to 30 seconds and the rate of mixing in the apparatus is suitably in the range 100 to 2500rpm depending upon the degree of densification and the particle size required.
  • the granulation step if present may be carried out using a lower speed mixer for example, the Drais (trade mark) K-T 160 and the Lodige (trade mark) KM300 mixer.
  • the residence time in the granulation step is suitably about 1 to 10 minutes and the rate of mixing in the apparatus is about 40 to 160 rpm.
  • a batch process may be employed in which the solid components of the composition are dosed into a mixer and the fluorescer mixture is suitably sprayed onto the solid component.
  • Suitable mixers include the FUKAE (a trademark) range of mixers. Other materials may be added subsequently as desired. Residence time is selected according to the required degree of granulation for example 1 to 20 minutes.
  • the fluorescer mixture is preferably sprayed onto the solid component of the composition to provide an even distribution of the mixture over the solid component.
  • the process of the invention provides a detergent composition having a bulk density of at least 750g/1 and which is not the product of a spray-drying process and which is obtainable by a process according to the invention comprising a surfactant, a detergency builder and a fluorescer and having a Delta R460 value of at least 3.5, preferably at least 5.5 and more preferably at least 6.5.
  • the fluorescer is incorporated into the composition by a process according to the invention.
  • Delta R460 values are determined by measuring the reflectance of light from the sample at 460 nm when irradiated with a tungsten lamp without a filter and measuring the reflectance, of the sample with a UV filter and calculating the difference between the two measurements.
  • the sample analysed is a 355 to 500 ⁇ m fraction obtained by sieving. This method provides an indication of the contribution of the fluorescer to the reflectance of the sample.
  • compositions produced according to the present invention will generally contain detergent-active compounds and detergency builders, and may optionally contain bleaching components and other active ingredients to enhance performance and properties.
  • the detergent-active compounds may be chosen from soap and non-soap anionic, cationic, nonionic, amphoteric and zwitterionic detergent-active compounds, and mixtures thereof.
  • Many suitable detergent-active compounds are available and are fully described in the literature, for example, in "Surface-Active Agents and Detergents", Volumes I and II, by Schwartz, Perry and Berch.
  • the preferred detergent-active compounds that can be used are soaps and synthetic non-soap anionic and nonionic compounds.
  • Anionic surfactants are well-known to those skilled in the art. Examples include alkylbenzene sulphonates, particularly linear alkylbenzene sulphonates having an alkyl chain length of C 8 -C 15 ; primary and secondary alkyl sulphates, particularly C 12 -C 15 primary alkyl sulphates; alkyl ether sulphates; olefin sulphonates; alkyl xylene sulphonates; dialkyl sulphosuccinates; and fatty acid ester sulphonates.
  • Sodium salts are generally preferred.
  • Nonionic surfactants may be included in any adjuncts employed in the composition in addition to that which may be present in the fluorescer mixture.
  • Suitable nonionics include the primary and secondary alcohol ethoxylates, especially the C 8 -C 20 aliphatic alcohols ethoxylated with an average of from 1 to 20 moles of ethylene oxide per mole of alcohol, and more especially the C 10 -C 15 primary and secondary aliphatic alcohols ethoxylated with an average of from 1 to 10 moles of ethylene oxide per mole of alcohol.
  • Non-ethoxylated nonionic surfactants include alkylpolyglycosides also glycerol monoethers, and polyhydroxyamides (glucamide).
  • detergent-active compound surfactant
  • amount present will depend on the intended use of the detergent composition. For example, for machine dishwashing a relatively low level of a low-foaming nonionic surfactant is generally preferred. In fabric washing compositions, different surfactant systems may be chosen, as is well known to the skilled formulator, for handwashing products and for products intended for use in different types of washing machine.
  • the total amount of surfactant present will also depend on the intended end use and may be as low as 0.5 wt%, for example, in a machine dishwashing composition, or as high as 60 wt%, for example, in a composition for washing fabrics by hand. In compositions for machine washing of fabrics, an amount of from 5 to 40 wt% is generally appropriate.
  • Detergent compositions suitable for use in most automatic fabric washing machines generally contain anionic non-soap surfactant, or nonionic surfactant, or combinations of the two in any ratio, optionally together with soap.
  • the detergent compositions produced according to the invention will generally also contain one or more detergency builders.
  • the total amount of detergency builder in the compositions will suitably range from 10 to 80 wt%, preferably from 15 to 60 wt%.
  • Inorganic builders that may be present include sodium carbonate, if desired in combination with a crystallisation seed for calcium carbonate, as disclosed in GB 1 437 950 (Unilever); crystalline and amorphous aluminosilicates, for example, zeolites as disclosed in GB 1 473 201 (Henkel), amorphous aluminosilicates as disclosed in GB 1 473 202 (Henkel) and mixed crystalline/amorphous aluminosilicates as disclosed in GB 1 470 250 (Procter & Gamble); and layered silicates as disclosed in EP 164 514B (Hoechst).
  • Inorganic phosphate builders for example, sodium orthophosphate, pyrophosphate and tripolyphosphate, may also be present.
  • zeolite builders may suitably be present in amounts of from 10 to 45 wt%, amounts of from 15 to 35 wt% being especially suitable for (machine) fabric washing compositions.
  • the zeolite used in most commercial particulate detergent compositions is zeolite A.
  • maximum aluminium zeolite P zeolite MAP
  • Zeolite MAP is an alkali metal aluminosilicate of the P type having a silicon to aluminium ratio not exceeding 1.33, preferably not exceeding 1.15, and more preferably not exceeding 1.07.
  • Organic builders that may be present include polycarboxylate polymers such as polyacrylates, acrylic/maleic copolymers, and acrylic phosphinates; monomeric polycarboxylates such as citrates, gluconates, oxydisuccinates, glycerol mono-, di- and trisuccinates, carboxymethyloxysuccinates, carboxymethyloxymalonates, dipicolinates, hydroxyethyliminodiacetates, alkyl- and alkenylmalonates and succinates; and sulphonated fatty acid salts. This list is not intended to be exhaustive.
  • polycarboxylate polymers such as polyacrylates, acrylic/maleic copolymers, and acrylic phosphinates
  • monomeric polycarboxylates such as citrates, gluconates, oxydisuccinates, glycerol mono-, di- and trisuccinates, carboxymethyloxysuccinates, carboxymethyloxymalonates, dipicolinates,
  • Especially preferred organic builders are citrates, nitrilotriacetic acid and oxydisuccinate and are suitably used in amounts of from 5 to 30 wt%, preferably from 10 to 25 wt%; and acrylic polymers, more especially acrylic/maleic copolymers, suitably used in amounts of from 0.5 to 15 wt%, preferably from 1 to 10 wt%.
  • Builders both inorganic and organic, are preferably present in alkali metal salt, especially sodium salt, form.
  • Detergent compositions produced according to the invention may also suitably contain a bleach system.
  • Machine dishwashing compositions may suitably contain a chlorine bleach system, while fabric washing compositions may more desirably contain peroxy bleach compounds, for example, inorganic persalts or organic peroxyacids, capable of yielding hydrogen peroxide in aqueous solution.
  • peroxy bleach compounds for example, inorganic persalts or organic peroxyacids, capable of yielding hydrogen peroxide in aqueous solution.
  • Suitable peroxy bleach compounds include organic peroxides such as urea peroxide, and inorganic persalts such as the alkali metal perborates, percarbonates, perphosphates, persilicates and persulphates.
  • organic peroxides such as urea peroxide
  • inorganic persalts such as the alkali metal perborates, percarbonates, perphosphates, persilicates and persulphates.
  • Preferred inorganic persalts are sodium perborate monohydrate and tetrahydrate, and sodium percarbonate.
  • sodium percarbonate having a protective coating against destabilisation by moisture Especially preferred is sodium percarbonate having a protective coating against destabilisation by moisture.
  • Sodium percarbonate having a protective coating comprising sodium metaborate and sodium silicate is disclosed in GB 2 123 044B (Kao).
  • the peroxy bleach compound is suitably present in an amount of from 5 to 35 wt%, preferably from 10 to 25 wt%.
  • the peroxy bleach compound may be used in conjunction with a bleach activator (bleach precursor) to improve bleaching action at low wash temperatures.
  • the bleach precursor is suitably present in an amount of from 1 to 8 wt%, preferably from 2 to 5 wt%.
  • Preferred bleach precursors are peroxycarboxylic acid precursors, more especially peracetic acid precursors and peroxybenzoic acid precursors; and peroxycarbonic acid precursors.
  • An especially preferred bleach precursor suitable for use in the present invention is N,N,N',N'-tetracetyl ethylenediamine (TAED).
  • novel quaternary ammonium and phosphonium bleach precursors disclosed in US 4 751 015 and US 4 818 426 (Lever Brothers Company) and EP 402 971A (Unilever) are also of great interest.
  • peroxycarbonic acid precursors in particular cholyl-4-sulphophenyl carbonate.
  • peroxybenzoic acid precursors in particular, N,N,N-trimethylammonium toluoyloxy benzene sulphonate; and the cationic bleach precursors disclosed in EP 284 292A and EP 303 520A (Kao).
  • a bleach stabiliser may also be present.
  • Suitable bleach stabilisers include ethylenediamine tetraacetate (EDTA) and the polyphosphonates such as Dequest (Trade Mark), EDTMP.
  • An especially preferred bleach system comprises a peroxy bleach compound (preferably sodium percarbonate optionally together with a bleach activator), and a transition metal bleach catalyst as described and claimed in EP 458 397A, EP 458 398A and EP 509 787A (Unilever).
  • a peroxy bleach compound preferably sodium percarbonate optionally together with a bleach activator
  • a transition metal bleach catalyst as described and claimed in EP 458 397A, EP 458 398A and EP 509 787A (Unilever).
  • compositions produced according to the invention may contain alkali metal, preferably sodium, carbonate, in order to increase detergency and ease processing.
  • Sodium carbonate may suitably be present in amounts ranging from 1 to 60 wt%, preferably from 2 to 40 wt%.
  • compositions containing little or no sodium carbonate are also within the scope of the invention.
  • Powder flow may be improved by the incorporation of a small amount of a powder structurant, for example, a fatty acid (or fatty acid soap), a sugar, an acrylate or acrylate/maleate polymer, or sodium silicate.
  • a powder structurant for example, a fatty acid (or fatty acid soap), a sugar, an acrylate or acrylate/maleate polymer, or sodium silicate.
  • One preferred powder structurant is fatty acid soap, suitably present in an amount of from 1 to 5 wt%.
  • detergent compositions produced according to the invention include sodium silicate and sodium metasilicate; antiredeposition agents such as cellulosic polymers; inorganic salts such as sodium sulphate; lather control agents or lather boosters as appropriate; proteolytic and lipolytic enzymes; dyes; coloured speckles; perfumes; foam controllers; and fabric softening compounds. This list is not intended to be exhaustive.
  • compositions were produced by mixing a fluorescer mixture with the other composition components in a FUKAE FS-30 mixer (trademark) to produce a granular detergent composition.
  • the fluorescer mixture was varied for each example as listed in Table 1 and the other composition components were as listed below: Na LAS 20 Sodium tripolyphosphate 25 Zeolite 4A 23 Sodium carbonate 19
  • Examples 1 and 2 were comparative examples in which fluorescer mixture contained non ionic surfactant but no water.
  • the final composition had the following components: EXAMPLE FLUORESCENT MIXTURE 1 0.02 TINOPAL CBS-X in 2 NI (suspension) (0.18 TINOPAL CBS-X added to mixer as solid) 2 0.2 TINOPAL CBS-X in 2 NI (suspension) 3 0.5 NI:0.05 TINOPAL CBS-X:0.05 water (solution) (1.5 NI added to mixer as liquid) 4 1.0 NI:0.1 TINOPAL CBS-X:0.1 water (solution) (1.0 NI added to mixer as liquid) 5 1.5 NI:0.15 TINOPAL CBS-X:0.15 water (solution) (0.5 NI added to mixer as liquid) 6 2.0 NI:0.2 TINOPAL CBS-X:0.2 water solution
  • the nonionic used was SYNPERONIC A7 ex ICI. (SYNPERONIC AND TINOPAL ARE TRADEMARKS)
  • the fluorescer mixtures were produced by mixing the TINOPAL CBS-X fluorescer and nonionic to form a suspension. Where present, water was then added to this suspension. The mixture was then stirred slowly (to avoid sedimentation) for 30 minutes and then allowed to stand for 1 hour.
  • the final product was sieved to provide a fraction having a particle size of 355 to 500 ⁇ m.
  • the reflectance of this fraction was measured at 460nm under UV light and UV excluded light from which the F value was calculated as described herein. The results are shown in Table 2.
  • composition not according to the invention having the same components as listed for Examples 1 to 6 and solid fluorescer (0.2 parts) and non-active solid surfactant (2 parts) was produced by mixing under the same conditions as Examples 1 to 6.
  • a series of powders were produced having a fixed level of CBS-X fluorescer which was introduced as a fluorescer mixture consisting of the fluorescer and varying ratios of SYNPERONIC A7 (SYNPERONIC is a TRADEMARK), nonionic surfactant and water.
  • the compositions contained the following components (parts by weight): SODIUM CARBONATE 16 SODIUM TRIPOLYPHOSPHATE 40 ZEOLITE 4A 11 Na LAS 27 TINOPAL CBS-X (TRADE MARK) 0.2 SYNPERONIC A7 2 WATER 1.8 MINORS to 100
  • FUKAE FS-30 FUKAE is a TRADEMARK
  • a fluorescer mixture containing 0.2 parts fluorescer having a nonionic/fluorescer/water ratio) as listed in Table 3 was then sprayed onto the solid with mixing and the Na LAS and any remaining nonionic and water was then dosed into the mixer.
  • Powders produced in these Examples exhibit excellent colour characteristics both as a fresh powder and after 2 weeks.
  • a higher proportion of nonionic in the fluorescer mixture was found to be advantageous in providing improved whiteness (lower 'b' value).
  • Powders were produced by the same process and having the same composition as those of Examples 7 to 14 with fluorescer mixture compositions as follows: EXAMPLE NONIONIC FLUORESCER WATER 15 10 1 1 16 10 1 2 17 10 1 3 18 10 1 4
  • the F values of these powders were determined and observed to be in excess of 8 both for the fresh powder and after 9 days.
  • the 'b' values were also determined and found to be between 2.5 and 4 for fresh powder and between 4 and 5 after 9 days.
  • the 'b' and F values illustrate that powders having excellent colour properties may be obtained by the process of the invention.

Description

This invention relates to a process for the production of a detergent composition. In particular this invention relates to a process for the production of a high bulk density detergent composition containing a fluorescer.
Detergent powders typically include components in addition to the detergent-active materials necessary for detergency which provide the powder with characteristics which may be viewed as desirable by the market for example perfume and fluorescer. Fluorescers have been used for many years in conventional spray-dried powders to give improved whiteners.
In the production of spray-dried powders, the fluorescer material is typically incorporated into the slurry of components which is to be spray-dried to produce the powder. Examples of this process are given in EP-A-352 892, Chemical Abstracts 109, 195, 198 and DE-A-2856687.
With the advent of high bulk density powders, for example having a bulk density in excess of 750g/l, new process routes have been proposed which involve subjecting a spray-dried powder to a "post-tower" mixing and densification process or mixing and densifying the components of the detergent composition without the use of a spray-drying step ("non-tower" process) for example as described in EP-A-367339 (Unilever).
Production of a detergent composition by a mixing process typically involves contacting and mixing the liquid components with the solid components of the composition so that the liquid binds the solid material thereby to form composition particles. With further mixing the particles increase in size to form granules. The ratio of liquids to solids has to be sufficiently high to promote binding but not so high that discrete particles are not obtained.
In "non-tower" processes fluorescers have been incorporated into the powder as a solid material in the mixing/densification step. However fluorescers may have an undesirable colour. Incorporating such fluorescers in solid form may impair the colour quality of the final powder.
We have now found that high bulk density powders having excellent colour properties may be produced by incorporating a fluorescer into a liquid component of the detergent composition to produce a pre-mix of the fluorescer which is then combined with solid components in a mixing step to produce the particulate composition.
According to the invention there is provided a process for the production of a high bulk density particulate detergent composition or component thereof containing a fluorescer, which comprises mixing the fluorescer with a liquid component of the composition or component, said liquid component consisting essentially of a nonionic surfactant and water and optionally fatty acid, to form a fluorescer mixture, and mixing the said fluorescer mixture with a solid component of the composition or component whereby a particulate detergent composition or component is produced.
High bulk density compositions having a bulk density of at least 750g/l may be produced by the present invention. The process of the present invention may be a continuous or a batch process as desired.
The components of the detergent composition will be selected to provide the desired characteristics and will generally include a surfactant and a builder in addition to the fluorescer.
The composition comprises at least one liquid component in order to bind the solid components together. The fluorescer is mixed with a liquid component, to form a fluorescer mixture which may be a slurry, dispersion or suspension. Agitation may be necessary in such cases to avoid undesirable sedimentation. It is especially preferred that the fluorescer mixture is a solution as particularly good powder colour may be secured.
The fluorescer mixture comprises a liquid nonionic surfactant. Further, the fluorescer mixture consists of a mixture of a fluorescer, a nonionic surfactant and water and optionally a fatty acid.
Suitable nonionic surfactants have an average degree of alkoxylation of 3 or more, preferably 5 or more, and desirably 20 or less. Desirably the fluorescer mixture is a solution to facilitate homogeneous dispersion of the fluorescer through the composition and the nonionic suitably has an average degree of alkoxylation of 6 or more. Ethoxylated alcohols are especially preferred. Suitable examples include SYNPERONIC A3, SYNPERONIC A7 ex ICI (SYNPERONIC is a Trademark) and coconut oil ethoxylates having an average degree of ethoxylation of 6.5. Examples of other liquid components which may be employed with the nonionic surfactant include polyethylene glycols, for example PEG 1500, and glycerol.
The fluorescer may comprise a fluorescer known in the art, such as a biphenyl compound for example a distyryl biphenyl compound. An especially preferred fluorescer is TINOPAL CBS-X ex Ciba Geigy (TINOPAL is a trademark). The fluorescer is suitably present in the composition in an amount of 0.001 to 1%, preferably 0.005 to 0.5%, more preferably 0.01% to 0.4%, especially 0.01 to 0.25% by weight based on the total composition.
The liquid component and fluorescer are suitably present in the fluorescer mixture in a ratio of 10:0.01 to 5 by weight preferably 10: 0.06 to 4 and more preferably 10:0.1 to 4. An especially preferred fluorescer mixture comprises a nonionic surfactant, for example SYNPERONIC A7 ex ICI, water and a fluorescer, for example TINOPAL CBS-X. Suitably the nonionic surfactant and water are present in a weight ratio of 50:1 to 1:10, preferably 20:1 to 3:8 and more preferably 10:1 to 3:8. Superior powder whiteness (lower 'b' value) is obtained at higher levels of nonionic in the fluoroescer mixture. The fluorescer suitably represents 1 to 25%, preferably 5 to 15% and more preferably 6 to 12% by weight of the fluorescer mixture.
Higher levels of fluorescer may be employed to provide fabric whitening benefits but this advantage may be offset by a poorer powder colour at high levels of fluorescer where the fluorescer is coloured, for example, in excess of 0.5% by weight based on the total powder.
Suitably, other fluorescers are included in the composition to improve fabric whiteness, thus obviating the need for undesirably high levels of coloured fluorescer, for example TINOPAL CBS-X. Preferably a dimorpholino fluorescer is present in the composition together with the powder fluorescer.
The fluorescer mixture is suitably prepared by mixing the fluorescer with the liquid component with agitation to obtain preferably a solution. For nonionic/water/fluorescer systems it is preferred that the fluorescer is mixed with the nonionic surfactant and the water is then added subsequently, or the fluorescer is added to a mixture of nonionic and water. Preferably the fluorescer mixture is prepared such that sedimentation of the fluorescer and 'gelling' of the liquid at ambient temperature is avoided.
The solid component may comprise all of the components of the detergent composition excluding the fluorescer mixture or alternatively the solid component may comprise at least one of the said components and the other components may be incorporated into the composition during or subsequent to the mixing of the solid component and the fluorescer mixture.
The solid component of the composition may comprise solid particles of individual components or solid particles comprising a plurality of components hereinafter referred to as "adjuncts", Components of the detergent composition which are liquid (excluding the fluorescer mixture) may be added to the solid component during or subsequent to the mixing step or incorporated by means of an adjunct as desired.
The solid component may be spray-dried powder but preferably comprises materials which are not produced directly by spray-drying, especially if a high bulk density is required.
Preferably the mixing of the fluorescer mixture and the non-spray-dried solid is effected in a high speed mixer with the fluorescer mixture being sprayed onto the solid. The particles obtained may be treated further as desired.
Optionally the particles may be passed directly to a cooling and/or drying step to produce finished base powder particles, to which other ingredients may then be post-mixed. Alternatively, the particles may be passed to a second, preferably low speed, mixing step in order to increase the bulk density of the particles and optionally then cooled and/ or dried as desired.
Where a continuous process is employed, the mixing and densification steps may be carried out simultaneously using a high speed mixer, suitable examples include a Shugi (trademark) Granulator, a Drais (trade mark) K-TTP 80 Granulator and the Lodige (trade mark) CB30 recycler. The residence time in the mixing step is suitably about 5 to 30 seconds and the rate of mixing in the apparatus is suitably in the range 100 to 2500rpm depending upon the degree of densification and the particle size required. The granulation step if present may be carried out using a lower speed mixer for example, the Drais (trade mark) K-T 160 and the Lodige (trade mark) KM300 mixer. The residence time in the granulation step is suitably about 1 to 10 minutes and the rate of mixing in the apparatus is about 40 to 160 rpm.
A batch process may be employed in which the solid components of the composition are dosed into a mixer and the fluorescer mixture is suitably sprayed onto the solid component. Suitable mixers include the FUKAE (a trademark) range of mixers. Other materials may be added subsequently as desired. Residence time is selected according to the required degree of granulation for example 1 to 20 minutes.
The fluorescer mixture is preferably sprayed onto the solid component of the composition to provide an even distribution of the mixture over the solid component.
We have found that high bulk density detergent compositions having excellent colour properties may be secured by a process according to the invention.
Preferably the process of the invention provides a detergent composition having a bulk density of at least 750g/1 and which is not the product of a spray-drying process and which is obtainable by a process according to the invention comprising a surfactant, a detergency builder and a fluorescer and having a Delta R460 value of at least 3.5, preferably at least 5.5 and more preferably at least 6.5.
The fluorescer is incorporated into the composition by a process according to the invention.
Delta R460 values (F values) are determined by measuring the reflectance of light from the sample at 460 nm when irradiated with a tungsten lamp without a filter and measuring the reflectance, of the sample with a UV filter and calculating the difference between the two measurements. The sample analysed is a 355 to 500 µm fraction obtained by sieving. This method provides an indication of the contribution of the fluorescer to the reflectance of the sample.
Compositions produced according to the present invention will generally contain detergent-active compounds and detergency builders, and may optionally contain bleaching components and other active ingredients to enhance performance and properties. The detergent-active compounds (surfactants) may be chosen from soap and non-soap anionic, cationic, nonionic, amphoteric and zwitterionic detergent-active compounds, and mixtures thereof. Many suitable detergent-active compounds are available and are fully described in the literature, for example, in "Surface-Active Agents and Detergents", Volumes I and II, by Schwartz, Perry and Berch.
The preferred detergent-active compounds that can be used are soaps and synthetic non-soap anionic and nonionic compounds.
Anionic surfactants are well-known to those skilled in the art. Examples include alkylbenzene sulphonates, particularly linear alkylbenzene sulphonates having an alkyl chain length of C8-C15; primary and secondary alkyl sulphates, particularly C12-C15 primary alkyl sulphates; alkyl ether sulphates; olefin sulphonates; alkyl xylene sulphonates; dialkyl sulphosuccinates; and fatty acid ester sulphonates. Sodium salts are generally preferred.
Nonionic surfactants may be included in any adjuncts employed in the composition in addition to that which may be present in the fluorescer mixture. Suitable nonionics include the primary and secondary alcohol ethoxylates, especially the C8-C20 aliphatic alcohols ethoxylated with an average of from 1 to 20 moles of ethylene oxide per mole of alcohol, and more especially the C10-C15 primary and secondary aliphatic alcohols ethoxylated with an average of from 1 to 10 moles of ethylene oxide per mole of alcohol. Non-ethoxylated nonionic surfactants include alkylpolyglycosides also glycerol monoethers, and polyhydroxyamides (glucamide).
The choice of detergent-active compound (surfactant), and the amount present, will depend on the intended use of the detergent composition. For example, for machine dishwashing a relatively low level of a low-foaming nonionic surfactant is generally preferred. In fabric washing compositions, different surfactant systems may be chosen, as is well known to the skilled formulator, for handwashing products and for products intended for use in different types of washing machine.
The total amount of surfactant present will also depend on the intended end use and may be as low as 0.5 wt%, for example, in a machine dishwashing composition, or as high as 60 wt%, for example, in a composition for washing fabrics by hand. In compositions for machine washing of fabrics, an amount of from 5 to 40 wt% is generally appropriate.
Detergent compositions suitable for use in most automatic fabric washing machines generally contain anionic non-soap surfactant, or nonionic surfactant, or combinations of the two in any ratio, optionally together with soap.
The detergent compositions produced according to the invention will generally also contain one or more detergency builders. The total amount of detergency builder in the compositions will suitably range from 10 to 80 wt%, preferably from 15 to 60 wt%.
Inorganic builders that may be present include sodium carbonate, if desired in combination with a crystallisation seed for calcium carbonate, as disclosed in GB 1 437 950 (Unilever); crystalline and amorphous aluminosilicates, for example, zeolites as disclosed in GB 1 473 201 (Henkel), amorphous aluminosilicates as disclosed in GB 1 473 202 (Henkel) and mixed crystalline/amorphous aluminosilicates as disclosed in GB 1 470 250 (Procter & Gamble); and layered silicates as disclosed in EP 164 514B (Hoechst). Inorganic phosphate builders, for example, sodium orthophosphate, pyrophosphate and tripolyphosphate, may also be present.
zeolite builders may suitably be present in amounts of from 10 to 45 wt%, amounts of from 15 to 35 wt% being especially suitable for (machine) fabric washing compositions. The zeolite used in most commercial particulate detergent compositions is zeolite A. Advantageously, however, maximum aluminium zeolite P (zeolite MAP) described and claimed in EP 384 070A (Unilever) may be used. Zeolite MAP is an alkali metal aluminosilicate of the P type having a silicon to aluminium ratio not exceeding 1.33, preferably not exceeding 1.15, and more preferably not exceeding 1.07.
Organic builders that may be present include polycarboxylate polymers such as polyacrylates, acrylic/maleic copolymers, and acrylic phosphinates; monomeric polycarboxylates such as citrates, gluconates, oxydisuccinates, glycerol mono-, di- and trisuccinates, carboxymethyloxysuccinates, carboxymethyloxymalonates, dipicolinates, hydroxyethyliminodiacetates, alkyl- and alkenylmalonates and succinates; and sulphonated fatty acid salts. This list is not intended to be exhaustive.
Especially preferred organic builders are citrates, nitrilotriacetic acid and oxydisuccinate and are suitably used in amounts of from 5 to 30 wt%, preferably from 10 to 25 wt%; and acrylic polymers, more especially acrylic/maleic copolymers, suitably used in amounts of from 0.5 to 15 wt%, preferably from 1 to 10 wt%.
Builders, both inorganic and organic, are preferably present in alkali metal salt, especially sodium salt, form.
Detergent compositions produced according to the invention may also suitably contain a bleach system. Machine dishwashing compositions may suitably contain a chlorine bleach system, while fabric washing compositions may more desirably contain peroxy bleach compounds, for example, inorganic persalts or organic peroxyacids, capable of yielding hydrogen peroxide in aqueous solution.
Suitable peroxy bleach compounds include organic peroxides such as urea peroxide, and inorganic persalts such as the alkali metal perborates, percarbonates, perphosphates, persilicates and persulphates. Preferred inorganic persalts are sodium perborate monohydrate and tetrahydrate, and sodium percarbonate.
Especially preferred is sodium percarbonate having a protective coating against destabilisation by moisture. Sodium percarbonate having a protective coating comprising sodium metaborate and sodium silicate is disclosed in GB 2 123 044B (Kao).
The peroxy bleach compound is suitably present in an amount of from 5 to 35 wt%, preferably from 10 to 25 wt%.
The peroxy bleach compound may be used in conjunction with a bleach activator (bleach precursor) to improve bleaching action at low wash temperatures. The bleach precursor is suitably present in an amount of from 1 to 8 wt%, preferably from 2 to 5 wt%.
Preferred bleach precursors are peroxycarboxylic acid precursors, more especially peracetic acid precursors and peroxybenzoic acid precursors; and peroxycarbonic acid precursors. An especially preferred bleach precursor suitable for use in the present invention is N,N,N',N'-tetracetyl ethylenediamine (TAED).
The novel quaternary ammonium and phosphonium bleach precursors disclosed in US 4 751 015 and US 4 818 426 (Lever Brothers Company) and EP 402 971A (Unilever) are also of great interest. Especially preferred are peroxycarbonic acid precursors, in particular cholyl-4-sulphophenyl carbonate. Also of interest are peroxybenzoic acid precursors, in particular, N,N,N-trimethylammonium toluoyloxy benzene sulphonate; and the cationic bleach precursors disclosed in EP 284 292A and EP 303 520A (Kao).
A bleach stabiliser (heavy metal sequestrant) may also be present. Suitable bleach stabilisers include ethylenediamine tetraacetate (EDTA) and the polyphosphonates such as Dequest (Trade Mark), EDTMP.
An especially preferred bleach system comprises a peroxy bleach compound (preferably sodium percarbonate optionally together with a bleach activator), and a transition metal bleach catalyst as described and claimed in EP 458 397A, EP 458 398A and EP 509 787A (Unilever).
The compositions produced according to the invention may contain alkali metal, preferably sodium, carbonate, in order to increase detergency and ease processing. Sodium carbonate may suitably be present in amounts ranging from 1 to 60 wt%, preferably from 2 to 40 wt%. However, compositions containing little or no sodium carbonate are also within the scope of the invention.
Powder flow may be improved by the incorporation of a small amount of a powder structurant, for example, a fatty acid (or fatty acid soap), a sugar, an acrylate or acrylate/maleate polymer, or sodium silicate.
One preferred powder structurant is fatty acid soap, suitably present in an amount of from 1 to 5 wt%.
Other materials that may be present in detergent compositions produced according to the invention include sodium silicate and sodium metasilicate; antiredeposition agents such as cellulosic polymers; inorganic salts such as sodium sulphate; lather control agents or lather boosters as appropriate; proteolytic and lipolytic enzymes; dyes; coloured speckles; perfumes; foam controllers; and fabric softening compounds. This list is not intended to be exhaustive.
The invention is illustrated by the following non-limiting examples. All figures in the examples are parts by weight unless otherwise stated.
Examples 1 to 6
Six compositions were produced by mixing a fluorescer mixture with the other composition components in a FUKAE FS-30 mixer (trademark) to produce a granular detergent composition. The fluorescer mixture was varied for each example as listed in Table 1 and the other composition components were as listed below:
Na LAS 20
Sodium tripolyphosphate 25
Zeolite 4A 23
Sodium carbonate 19
Examples 1 and 2 were comparative examples in which fluorescer mixture contained non ionic surfactant but no water. The final composition had the following components:
EXAMPLE FLUORESCENT MIXTURE
1 0.02 TINOPAL CBS-X in 2 NI (suspension) (0.18 TINOPAL CBS-X added to mixer as solid)
2 0.2 TINOPAL CBS-X in 2 NI (suspension)
3 0.5 NI:0.05 TINOPAL CBS-X:0.05 water (solution) (1.5 NI added to mixer as liquid)
4 1.0 NI:0.1 TINOPAL CBS-X:0.1 water (solution) (1.0 NI added to mixer as liquid)
5 1.5 NI:0.15 TINOPAL CBS-X:0.15 water (solution) (0.5 NI added to mixer as liquid)
6 2.0 NI:0.2 TINOPAL CBS-X:0.2 water solution
The nonionic used was SYNPERONIC A7 ex ICI. (SYNPERONIC AND TINOPAL ARE TRADEMARKS)
The fluorescer mixtures were produced by mixing the TINOPAL CBS-X fluorescer and nonionic to form a suspension. Where present, water was then added to this suspension. The mixture was then stirred slowly (to avoid sedimentation) for 30 minutes and then allowed to stand for 1 hour.
The final product was sieved to provide a fraction having a particle size of 355 to 500µm. The reflectance of this fraction was measured at 460nm under UV light and UV excluded light from which the F value was calculated as described herein. The results are shown in Table 2.
Comparative Example A
A composition not according to the invention having the same components as listed for Examples 1 to 6 and solid fluorescer (0.2 parts) and non-active solid surfactant (2 parts) was produced by mixing under the same conditions as Examples 1 to 6.
The F value of this composition was calculated and the results are shown in Table 2.
EXAMPLE F VALUE
1 3.9
2 5.5
3 6.9
4 7.1
5 7.5
6 7.2
A 3.0
The above results demonstrate that by incorporating the fluorescer by way of a fluorescer mixture which is then mixed with the solid components, improved powder whiteness is secured as compared with the process of the prior art. Further, Examples 3 to 6 illustrate that further improved whiteness is secured if the fluorescer mixture is a solution.
Example 7 to 14
A series of powders were produced having a fixed level of CBS-X fluorescer which was introduced as a fluorescer mixture consisting of the fluorescer and varying ratios of SYNPERONIC A7 (SYNPERONIC is a TRADEMARK), nonionic surfactant and water. The compositions contained the following components (parts by weight):
SODIUM CARBONATE 16
SODIUM TRIPOLYPHOSPHATE 40
ZEOLITE 4A 11
Na LAS 27
TINOPAL CBS-X (TRADE MARK) 0.2
SYNPERONIC A7 2
WATER 1.8
MINORS to 100
The solids (excluding fluorescer) were mixed together and dosed ito a FUKAE FS-30 (FUKAE is a TRADEMARK) batch mixer. A fluorescer mixture containing 0.2 parts fluorescer having a nonionic/fluorescer/water ratio) as listed in Table 3 was then sprayed onto the solid with mixing and the Na LAS and any remaining nonionic and water was then dosed into the mixer.
Finally, the zeolite was added as a layering material.
EXAMPLE NONIONIC FLUORESCER WATER
7 3 1 8
8 4 1 7
9 5 1 6
10 6 1 5
11 7 1 4
12 8 1 3
13 9 1 2
14 10 1 1
Results
The F value of the 350 to 500 µm fraction of the powders was determined for the fresh powder and after 2 weeks at ambient conditions. The results are shown in Table 4.
EXAMPLE 7 8 9 10 11 12 13 14
F Value (fresh) 4 4.8 5.0 4.9 7.8 8.5 7.8 8.5
F Value (2 weeks) 6.8 8.5 7.8 8.0 8.8 8.8 8.5 8.0
Powders produced in these Examples exhibit excellent colour characteristics both as a fresh powder and after 2 weeks. A higher proportion of nonionic in the fluorescer mixture was found to be advantageous in providing improved whiteness (lower 'b' value).
Example 15 to 18
Powders were produced by the same process and having the same composition as those of Examples 7 to 14 with fluorescer mixture compositions as follows:
EXAMPLE NONIONIC FLUORESCER WATER
15 10 1 1
16 10 1 2
17 10 1 3
18 10 1 4
The F values of these powders (350 - 500 µm fraction) were determined and observed to be in excess of 8 both for the fresh powder and after 9 days. The 'b' values were also determined and found to be between 2.5 and 4 for fresh powder and between 4 and 5 after 9 days. The 'b' and F values illustrate that powders having excellent colour properties may be obtained by the process of the invention.

Claims (9)

  1. A process for the production of a high bulk density particulate detergent composition or component thereof containing a fluorescer, which comprises mixing the fluorescer with a liquid component of the composition or component, said liquid component consisting of a nonionic surfactant and water and optionally a fatty acid, to form a fluorescer mixture, and mixing the said fluorescer mixture with a solid component of the composition or component whereby a particulate detergent composition or component is produced.
  2. A process according to claim 1 in which the fluorescer mixture is a solution.
  3. A process according to claim 1 or claim 2 in which the liquid component consists of a nonionic surfactant and water.
  4. A process according to claim 1 or claim 2 in which the liquid component consists of a nonionic surfactant, water and a fatty acid.
  5. A process according to any one of claims 2 to 4 in which the weight ratio of nonionic surfactant to water is in the range 50:1 to 1:10, preferably 20:1 to 3:8 and more preferably 10:1 to 3:8.
  6. A process according to any preceding claim in which the amount of fluorescer by weight in the fluorescer mixture is in the range 1 to 25%, preferably 5 to 15% and more preferably 6 to 12%.
  7. A process according to any preceding claim in which the liquid component and fluorescer are present in a weight ratio of 10:0.01 to 5.
  8. A process according to any preceding claim in which the solid component comprises an anionic surfactant and/or a detergency builder as separate components and/or as an adjunct.
  9. A process according to any preceding claim in which the solid component is not the product of a spray-drying process.
EP95900225A 1993-11-11 1994-11-09 Process for the production of a detergent composition Expired - Lifetime EP0728187B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB939323250A GB9323250D0 (en) 1993-11-11 1993-11-11 Process for the production of a detergent composition
GB9323250 1993-11-11
PCT/GB1994/002458 WO1995013358A1 (en) 1993-11-11 1994-11-09 Process for the production of a detergent composition

Publications (2)

Publication Number Publication Date
EP0728187A1 EP0728187A1 (en) 1996-08-28
EP0728187B1 true EP0728187B1 (en) 1999-01-20

Family

ID=10744991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95900225A Expired - Lifetime EP0728187B1 (en) 1993-11-11 1994-11-09 Process for the production of a detergent composition

Country Status (15)

Country Link
EP (1) EP0728187B1 (en)
JP (1) JP2813469B2 (en)
CN (1) CN1063481C (en)
AU (1) AU8112494A (en)
BR (1) BR9408035A (en)
CA (1) CA2173445C (en)
CZ (1) CZ290773B6 (en)
DE (1) DE69416157T2 (en)
ES (1) ES2127503T3 (en)
GB (1) GB9323250D0 (en)
HU (1) HU217767B (en)
PL (1) PL177611B1 (en)
SK (1) SK281898B6 (en)
WO (1) WO1995013358A1 (en)
ZA (1) ZA948557B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19538029A1 (en) 1995-10-12 1997-04-17 Sued Chemie Ag detergent additive
GB2318360A (en) * 1996-10-15 1998-04-22 Ciba Geigy Ag Fluorescent whitening agent formulation
JP2017509774A (en) * 2014-01-20 2017-04-06 ザ プロクター アンド ギャンブル カンパニー Optical brightener premix

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2856087A1 (en) * 1978-12-23 1980-07-10 Henkel Kgaa Powdered washing compsn. contg. aluminosilicate and brightener - with nonionic polyglycol ether added before drying to inhibit discolouration
JPS63265999A (en) * 1987-04-22 1988-11-02 Kao Corp High-density, particulate and concentrated detergent composition
JPH0633439B2 (en) * 1988-07-28 1994-05-02 花王株式会社 High-density granular concentrated detergent composition
FR2655658B1 (en) * 1989-12-08 1994-11-18 Rhone Poulenc Chimie LAUNDRY COMPOUND BASED ON A POLYPHOSPHATE AND IN PARTICULAR AN OPTICALLY ACTIVE AGENT, ITS PREPARATION METHOD AND ITS USE IN DETERGENCE.
DE69227311T2 (en) * 1992-07-15 1999-06-02 Procter & Gamble Detergent compositions
JPH07302401A (en) * 1994-04-28 1995-11-14 Narita Giken Kk Rotary magnetic head device for magnetic recording and reproducing device

Also Published As

Publication number Publication date
ES2127503T3 (en) 1999-04-16
SK57796A3 (en) 1997-06-04
CN1063481C (en) 2001-03-21
AU8112494A (en) 1995-05-29
PL177611B1 (en) 1999-12-31
GB9323250D0 (en) 1994-01-05
DE69416157T2 (en) 1999-06-02
DE69416157D1 (en) 1999-03-04
BR9408035A (en) 1996-12-17
CA2173445A1 (en) 1995-05-18
WO1995013358A1 (en) 1995-05-18
CZ290773B6 (en) 2002-10-16
CA2173445C (en) 2000-07-18
JP2813469B2 (en) 1998-10-22
CN1134723A (en) 1996-10-30
HU9601255D0 (en) 1996-07-29
SK281898B6 (en) 2001-09-11
JPH09506122A (en) 1997-06-17
EP0728187A1 (en) 1996-08-28
ZA948557B (en) 1996-04-30
CZ136096A3 (en) 1996-10-16
HU217767B (en) 2000-04-28
HUT75017A (en) 1997-03-28

Similar Documents

Publication Publication Date Title
EP1558717B1 (en) Laundry detergent composition
EP0714432B1 (en) Granular detergent compositions containing zeolite and process for their preparation
CA2351760C (en) Particulate laundry detergent compositions containing anionic surfactant granules
US6025320A (en) Detergent compositions and process for preparing them
EP1421167B1 (en) Process for manufacture of perfumed coloured speckle compositoin for particulate laundry detergent compositions containing it
ZA200206458B (en) Detergent compositions with highly ethoxylated nonionics alcohol surfactants.
US5536432A (en) Process for the production of a detergent composition
EP0728187B1 (en) Process for the production of a detergent composition
WO2006087108A1 (en) Detergent composition
EP0892843B1 (en) Modified aluminosilicate
EP1436378B1 (en) Detergent compositions containing potassium carbonate and process for preparing them
US20030114347A1 (en) Detergent compositions
AU9048098A (en) A process for preparing a granular detergent composition containing zeolite

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19960329

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE ES FR GB IT LI NL SE

17Q First examination report despatched

Effective date: 19961031

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE ES FR GB IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990120

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990120

Ref country code: LI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990120

Ref country code: CH

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990120

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69416157

Country of ref document: DE

Date of ref document: 19990304

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2127503

Country of ref document: ES

Kind code of ref document: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990421

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

26 Opposition filed

Opponent name: HENKEL KGAA

Effective date: 19991020

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PLBO Opposition rejected

Free format text: ORIGINAL CODE: EPIDOS REJO

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

APAE Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOS REFNO

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: OPPOSITION REJECTED

27O Opposition rejected

Effective date: 20021011

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20061124

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20061130

Year of fee payment: 13

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20071110

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071110

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071109

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20121128

Year of fee payment: 19

Ref country code: FR

Payment date: 20121206

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20121126

Year of fee payment: 19

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20131109

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20140731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140603

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 69416157

Country of ref document: DE

Effective date: 20140603

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20131109

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20131202