EP2475759A1 - Process for the production of a bleach activator granule - Google Patents

Process for the production of a bleach activator granule

Info

Publication number
EP2475759A1
EP2475759A1 EP10752920A EP10752920A EP2475759A1 EP 2475759 A1 EP2475759 A1 EP 2475759A1 EP 10752920 A EP10752920 A EP 10752920A EP 10752920 A EP10752920 A EP 10752920A EP 2475759 A1 EP2475759 A1 EP 2475759A1
Authority
EP
European Patent Office
Prior art keywords
bleach activator
composition
water
extrusion
granule
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.)
Withdrawn
Application number
EP10752920A
Other languages
German (de)
French (fr)
Inventor
Antonio Cordellina
Anna Crestana
Remigio Musci
Dora Zamuner
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.)
Reckitt Benckiser Vanish BV
Original Assignee
Reckitt Benckiser 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
Application filed by Reckitt Benckiser NV filed Critical Reckitt Benckiser NV
Publication of EP2475759A1 publication Critical patent/EP2475759A1/en
Withdrawn legal-status Critical Current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
    • C11D3/39—Organic or inorganic per-compounds
    • C11D3/3902—Organic or inorganic per-compounds combined with specific additives
    • C11D3/3905—Bleach activators or bleach catalysts
    • C11D3/3907—Organic compounds
    • C11D3/391—Oxygen-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0039—Coated compositions or coated components in the compositions, (micro)capsules
    • 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
    • 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
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/22—Carbohydrates or derivatives thereof
    • C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
    • 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
    • C11D3/39—Organic or inorganic per-compounds
    • C11D3/3902—Organic or inorganic per-compounds combined with specific additives
    • C11D3/3905—Bleach activators or bleach catalysts
    • C11D3/3935—Bleach activators or bleach catalysts granulated, coated or protected

Definitions

  • the present invention relates to granular bleach activators .
  • Detergents which contain per-compounds as bleaches are only effective in bleaching at high temperatures because the per-compounds do not decompose at sufficient speed at lower temperatures to be able to participate actively in the bleaching process.
  • activators which react with the peroxo group of the per-compounds to form per-acids are employed. These per-acids are active at the low temperatures required for washing (delicate) fabrics .
  • activators which include N-acyl and O-acyl compounds, such as anhydrides or acid amides, as well as nitriles are very sensitive to hydrolysis, especially in the presence of the alkalis conventionally used in detergents .
  • This small powder (comprising the bleach activator in granular form, e.g. from 0.5 to 3 mm is usually made in an extrusion process.
  • the extrusion process itself can give rise to a number of stability issues for the bleach activator granule.
  • the first disadvantage of the extrusion process is that an extrusion aid, e.g. a lubricating aid is required to be able to extrude the bleach activator composition.
  • the extrusion aid comprises a lubricant such as a non-ionic surfactant.
  • these types of components are excellent lubrication aids (and also detergent actives) they can interact disadvantageously with the bleach activator making it more reactive once in contact with the persalt in the formulation giving poor stability and lower shelf life,
  • a process for the production of a bleach activator granule comprising the extrusion of a bleach activator composition, the composition comprising decanoyloxybenzoic acid (DOBA), a water swellable carbohydrate and water.
  • DOBA decanoyloxybenzoic acid
  • the extrusion process may be operated at low pressure.
  • the extrusion process may be operated at a pressure of less than 2MPa, more preferably less than SOOkPa, more preferably less than 300kPa, more preferably less than 200kPa, more preferably less than lOOkPa and most preferably less than 50kPa.
  • a pressure of less than 2MPa more preferably less than SOOkPa, more preferably less than 300kPa, more preferably less than 200kPa, more preferably less than lOOkPa and most preferably less than 50kPa.
  • the granules have good flowability.
  • the pellets are cylindrical. This shape (when produced through the pelletisation process above) has been found to best achieve all the advantageous stability properties above (particularly in alkaline conditions) , whilst also providing fast dissolution. Without wishing to be limited by theory it is postulated that this shape is influential in this respect since it provides the lowest surface area of a 3-dimensional body.
  • the granules in general have a size of from 0.1 to 10mm, more preferably from 0.5 to 4 mm, preferably from 0.5 to 2 mm. (It is to be appreciated that within the matrix of the pellets there are disposed particles of bleach activator which are considerable smaller than the overall size of the pellet. This has been found to have a positive effect on the stability of the bleach activator particles whilst enhancing rapid solubility) .
  • a secondary bleach activator such as TAED, DECOBS, NOBS and / or LOBS is present.
  • the bleach activator composition comprises about 10-98% of a bleach activator, more preferably 20- 95%, more preferably 30-90%, more preferably 50-90%, more preferably 70-90%, and most preferably about 88%.
  • the bleach activator granules produced have been observed to have a low porosity. This is a great aid in the prevention of moisture uptake into the granule post production and further enhances the stability of the granule. The value of this advantage is not to be under-estimated.
  • an excess of bleach activator is added to the formulation working on the basis that a certain proportion of the bleach activator will decompose before the detergent is used.
  • the enhanced stability of the granules produced means that a lower amount of bleach activator granules can be added to the detergent formulation (since the amount of decomposition is lower ⁇ thus saving costs.
  • the bleach activator composition comprises water, more preferably from 1 to 30%, more preferably from 1 to 20%, and most preferably about 10%.
  • water swellable carbohydrate examples include CMC, CMA, starch, and sugars.
  • the bleach activator composition comprises one or more further detergent actives.
  • Preferred examples of such actives include surfactants; nonionic, cationic and /or anionic surfactants.
  • the bleach activator may be coated.
  • the process may comprise other production steps. Indeed a preferred example of a complete production of a bleach activator granule comprises :-
  • the drying stage is performed in a fluid bed drying apparatus.
  • a bleach activator granule made in a process comprising the extrusion of a composition comprising decanoyloxybenzoic acid (DOBA) , the composition further comprising a water swellable carbohydrate and water.
  • DOBA decanoyloxybenzoic acid
  • the bleach activator granule is preferably for us in a detergent composition.

Landscapes

  • 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)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Emergency Medicine (AREA)
  • Detergent Compositions (AREA)

Abstract

A process for the production of a bleach activator granule comprising the extrusion of a bleach activator composition. The composition comprises decanoyloxybenzoic acid (DOBA), a water swellable carbohydrate and water.

Description

PROCESS FOR THE PRODUCTION OF A BLEACH ACTIVATOR GRANULE
The present invention relates to granular bleach activators .
Detergents which contain per-compounds as bleaches are only effective in bleaching at high temperatures because the per-compounds do not decompose at sufficient speed at lower temperatures to be able to participate actively in the bleaching process. To counter this issue activators which react with the peroxo group of the per-compounds to form per-acids are employed. These per-acids are active at the low temperatures required for washing (delicate) fabrics .
These activators, which include N-acyl and O-acyl compounds, such as anhydrides or acid amides, as well as nitriles are very sensitive to hydrolysis, especially in the presence of the alkalis conventionally used in detergents .
This problem is accentuated by the fact that the activators are often only sparingly soluble in water, which is why they have to be employed in the form of a very fine powder to ensure more rapid dispersion. This fine form, however, by virtue of its greater surface area results in increased hydrolysis of the activators on storage .
This small powder (comprising the bleach activator in granular form, e.g. from 0.5 to 3 mm is usually made in an extrusion process. The extrusion process itself can give rise to a number of stability issues for the bleach activator granule.
The first disadvantage of the extrusion process is that an extrusion aid, e.g. a lubricating aid is required to be able to extrude the bleach activator composition. Usually the extrusion aid comprises a lubricant such as a non-ionic surfactant. However, whilst these types of components are excellent lubrication aids (and also detergent actives) they can interact disadvantageously with the bleach activator making it more reactive once in contact with the persalt in the formulation giving poor stability and lower shelf life,
A further issue with the extrusion process is that typically the extruded granules have a high level of porosity. This leads to poor stability and lower shelf life since the granules permit a higher level of external moisture ingress, and an intimate contact with persalt and other ingredients typically present in a detergent formulation e.g., alkalis hence an undesirable level of hydrolysis of the bleach activator active.
It is an object of the present invention to obviate / mitigate the problems outlined above.
According to the present invention there is provided a process for the production of a bleach activator granule comprising the extrusion of a bleach activator composition, the composition comprising decanoyloxybenzoic acid (DOBA), a water swellable carbohydrate and water.
We have found that the process of the present invention produces bleach activator granules which have excellent properties. These properties are particularly the properties of high stability (particularly in long term storage) .
Additionally it has been found that the extrusion process may be operated at low pressure. Typically the extrusion process may be operated at a pressure of less than 2MPa, more preferably less than SOOkPa, more preferably less than 300kPa, more preferably less than 200kPa, more preferably less than lOOkPa and most preferably less than 50kPa. Indeed it has been fond that most of the time little or no back pressure / pressure difference has to be provided in the extrusion process.
Also the granules have good flowability.
Indeed with the process of the invention the problem of hydrolysis of DOBA (especially in alkaline conditions) , which normally leads to loss of performance, has been found to be significantly reduced.
Generally the pellets are cylindrical. This shape (when produced through the pelletisation process above) has been found to best achieve all the advantageous stability properties above (particularly in alkaline conditions) , whilst also providing fast dissolution. Without wishing to be limited by theory it is postulated that this shape is influential in this respect since it provides the lowest surface area of a 3-dimensional body.
The granules in general have a size of from 0.1 to 10mm, more preferably from 0.5 to 4 mm, preferably from 0.5 to 2 mm. (It is to be appreciated that within the matrix of the pellets there are disposed particles of bleach activator which are considerable smaller than the overall size of the pellet. This has been found to have a positive effect on the stability of the bleach activator particles whilst enhancing rapid solubility) .
Preferably a secondary bleach activator such as TAED, DECOBS, NOBS and / or LOBS is present.
Preferably the bleach activator composition comprises about 10-98% of a bleach activator, more preferably 20- 95%, more preferably 30-90%, more preferably 50-90%, more preferably 70-90%, and most preferably about 88%.
It has been found that the inclusion of water as extrusion aid in the bleach activator composition is extremely advantageous. Without wishing to be bound by theory it is postulated that the inclusion of water has a number of separate advantages.
These include a positive influence on the temperature of the extrusion process. The presence of water is able to ensure that in the extrusion process the extrusion temperature is not elevated excessively which could otherwise lead to detrimental decomposition of the bleach activator. This positive influence is shown in the extrusion process per se and in any conditioning steps which can occur after the granules have been extruded. The water content of the bleach activator composition has been found to be extremely easy to remove after the extrusion and subsequent conditioning steps.
It has also been observed that the water is a highly beneficial extrusion aid.
Perhaps the most important advantage is that with the process of the present invention the bleach activator granules produced have been observed to have a low porosity. This is a great aid in the prevention of moisture uptake into the granule post production and further enhances the stability of the granule. The value of this advantage is not to be under-estimated. Currently in detergent formulations an excess of bleach activator is added to the formulation working on the basis that a certain proportion of the bleach activator will decompose before the detergent is used. In the process of the present invention the enhanced stability of the granules produced means that a lower amount of bleach activator granules can be added to the detergent formulation (since the amount of decomposition is lower} thus saving costs. Preferably the bleach activator composition comprises water, more preferably from 1 to 30%, more preferably from 1 to 20%, and most preferably about 10%.
Preferred examples of water swellable carbohydrate include CMC, CMA, starch, and sugars.
Optionally the bleach activator composition comprises one or more further detergent actives. Preferred examples of such actives include surfactants; nonionic, cationic and /or anionic surfactants.
The bleach activator may be coated.
The process may comprise other production steps. Indeed a preferred example of a complete production of a bleach activator granule comprises :-
A) Mixing of granule components.
B) Delivery of the mixture from (A) to the pelletiser
C) Pelletisation.
D) Delivery of the pellets to a drier.
E) Drying.
Preferably the drying stage is performed in a fluid bed drying apparatus.
According to a second aspect of the present invention there is provided a bleach activator granule made in a process comprising the extrusion of a composition comprising decanoyloxybenzoic acid (DOBA) , the composition further comprising a water swellable carbohydrate and water.
The bleach activator granule is preferably for us in a detergent composition.

Claims

1. A process for the production of a bleach activator granule comprising the extrusion of a bleach activator composition, the composition comprising decanoyloxybenzoic acid (DOBA) , a water swellable carbohydrate and water.
2. A process according to claim 1, wherein the pellets are cylindrical.
3. A process according to claim 1 or 2, wherein the granules have a size of from 0.1 to 10mm, more preferably from 0.5 to 3 mm, preferably from 0.5 to 2 mm.
4. A process according to claim 1, 2 or 3, wherein a secondary bleach activator such as TAED, DECOBS, NOBS and / or LOBS is present.
5. A process according to any one of claims 1 to 4, wherein the bleach activator composition comprises about 10-98% of a bleach activator, more preferably 20-95%, more preferably 30-90%, more preferably 50-90%, more preferably 70-90%, and most preferably about 88%.
6. A process according to any one of claims 1 to 5, wherein preferably the bleach activator composition comprises water, more preferably from 1 to 30%, more preferably from 1 to 20%, and most preferably bout 10%.
7. A process according to any one of claims 1 to 6, wherein the bleach activator is coated.
8. Bleach activator granule made in a process comprising the extrusion of a composition comprising decanoyloxybenzoic acid (DOBA) , the composition further comprising a water swellable carbohydrate and water.
9. A bleach activator granule according to claim 7 for use in a detergent composition.
EP10752920A 2009-09-08 2010-09-08 Process for the production of a bleach activator granule Withdrawn EP2475759A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0915627A GB2473275A (en) 2009-09-08 2009-09-08 Bleach activator granule comprising DOBA and a process of production thereof involving extrusion
PCT/GB2010/051495 WO2011030144A1 (en) 2009-09-08 2010-09-08 Process for the production of a bleach activator granule

Publications (1)

Publication Number Publication Date
EP2475759A1 true EP2475759A1 (en) 2012-07-18

Family

ID=41203332

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10752920A Withdrawn EP2475759A1 (en) 2009-09-08 2010-09-08 Process for the production of a bleach activator granule

Country Status (3)

Country Link
EP (1) EP2475759A1 (en)
GB (1) GB2473275A (en)
WO (1) WO2011030144A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2573158B1 (en) * 2011-09-20 2016-11-30 The Procter and Gamble Company Bleaching composition for food stains
US20140243252A1 (en) * 2013-02-28 2014-08-28 Futurefuel Chemical Company Laundry detergent formulation

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5534196A (en) * 1993-12-23 1996-07-09 The Procter & Gamble Co. Process for making lactam bleach activator containing particles
EP0880581A4 (en) * 1996-01-29 2001-10-10 Procter & Gamble METHOD FOR MANUFACTURING PARTICULATE BLEACHING ACTIVATORS
EP0816482B1 (en) * 1996-06-28 2004-03-31 THE PROCTER & GAMBLE COMPANY Bleach precursor compositions
CA2417655A1 (en) * 2000-08-30 2002-03-07 The Procter & Gamble Company Granular bleach activators having improved solubility profiles
DE102004043360A1 (en) * 2004-09-08 2006-03-09 Clariant Gmbh Bleach activator mixtures
DE102004043359A1 (en) * 2004-09-08 2006-03-09 Clariant Gmbh Bleaching activator-granulates, useful e.g. in washing-, cleaning- and disinfecting agents, comprises hydroxybenzoicacid derivatives, quaternary hydroxyalkyl ammonium compounds and granulation auxiliary- and/or coating agents
DE102005041967A1 (en) * 2005-09-03 2007-03-08 Clariant Produkte (Deutschland) Gmbh Granular Bleach Activator Blends
GB0710559D0 (en) * 2007-06-02 2007-07-11 Reckitt Benckiser Nv Composition

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2011030144A1 *

Also Published As

Publication number Publication date
GB0915627D0 (en) 2009-10-07
GB2473275A (en) 2011-03-09
WO2011030144A1 (en) 2011-03-17

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