EP1562856A1 - Silicate compositions - Google Patents

Silicate compositions

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Publication number
EP1562856A1
EP1562856A1 EP03775547A EP03775547A EP1562856A1 EP 1562856 A1 EP1562856 A1 EP 1562856A1 EP 03775547 A EP03775547 A EP 03775547A EP 03775547 A EP03775547 A EP 03775547A EP 1562856 A1 EP1562856 A1 EP 1562856A1
Authority
EP
European Patent Office
Prior art keywords
composition
salt
carboxylic acid
alkali metal
silicate
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Withdrawn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
EP03775547A
Other languages
German (de)
French (fr)
Inventor
Abraham Araya
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.)
Ineos Silicas Ltd
Original Assignee
Ineos Silicas Ltd
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 Ineos Silicas Ltd filed Critical Ineos Silicas Ltd
Publication of EP1562856A1 publication Critical patent/EP1562856A1/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Withdrawn legal-status Critical Current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
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/12—Water-insoluble compounds
    • C11D3/124—Silicon containing, e.g. silica, silex, quartz or glass beads
    • C11D3/1246—Silicates, e.g. diatomaceous earth
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/20—Silicates
    • C01B33/32—Alkali metal silicates
    • 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
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • 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
    • C11D3/2075—Carboxylic acids-salts thereof
    • C11D3/2079—Monocarboxylic acids-salts thereof

Definitions

  • This invention relates to alkali metal silicate compositions and particularly to alkali metal silicate compositions which are resistant to caking.
  • Solid alkali metal silicates have found widespread use in many applications.
  • One major application is as an additive for detergent compositions to provide, for example, anti- corrosion, building, soil suspension and bleach stabilising properties.
  • alkali metal silicates which readily dissolve in water also frequently have a tendency to cake on exposure to humid conditions. This can create processing difficulties in the preparation of detergent compositions containing such silicates.
  • a solid particulate alkali metal silicate composition comprises a mixture of a particulate alkali metal silicate and a particulate salt of a carboxylic acid having a carbon chain length in the range 6 to 24 carbon atoms, said salt of a carboxylic acid having a volume average particle size of less than 30 ⁇ m.
  • a method for the preparation of a silicate composition comprising mixing a particulate alkali metal silicate, in particular particles consisting essentially of the alkali metal silicate, with a particulate salt of a carboxylic acid having a carbon chain length in the range 6 to 24 carbon atoms, said salt of a carboxylic acid having a volume average particle size of less than 30 ⁇ m.
  • Such a composition in the form of a mixture consisting essentially of particles of alkali metal silicate in admixture with a particulate salt of a carboxylic acid, has been found to remain free-flowing when exposed in a sample tube to relatively high humidity over a prolonged period, whereas a similar silicate without any admixed carboxylic acid salt was converted into a solid tablet after exposure to the same humidity for a few hours and a wet solid glassy tablet within 24 hours.
  • a caking-resistant, water soluble solid particulate material in the form of an alkali metal silicate composition comprising a mixture of: (a) particles consisting essentially of alkali metal silicate; and
  • the alkali metal silicate can be a silicate of any alkali metal but sodium and potassium silicates are preferred and most commonly it is a sodium silicate.
  • the invention is applicable to silicates having any molar ratio of Si0 2 : M 2 0 (where M is an alkali metal) but is particularly useful for silicates having a relatively high solubility.
  • the silicate preferably has a molar ratio of Si0 2 : M 2 0 below 3.0 : 1 and, more preferably, below 2.5 : 1.
  • Normally the silicate will have a molar ratio of Si0 2 : M 2 0 greater than 1.5 : 1.
  • the invention can provide resistance to caking for alkali metal silicates with a wide range of particle sizes, for instance ranging up to about 1200 ⁇ m, typically from about 40 ⁇ m to 1200 ⁇ m, e.g. from about 40 ⁇ m to 1000 ⁇ m.
  • the volume average particle size of the silicate is greater than 40 ⁇ m.
  • Preferred salts of carboxylic acids are salts of Group I metals, Group II metals or zinc. Particularly useful salts are salts of sodium or magnesium.
  • the carboxylic acid is a saturated or unsaturated carboxylic acid.
  • it is a monocarboxylic acid having a chain length of 6 to 24 carbon atoms.
  • Preferred salts are salts of monocarboxylic acids containing 10 to 24 carbon atoms and particularly preferred monocarboxylic acids contain 14 to 24 carbon atoms. Salts of stearic acid have been found to be particularly suitable for use in the invention.
  • the volume average particle size of the salt of a carboxylic acid is less than 30 ⁇ m and preferably less than 20 ⁇ m. Normally, the volume average particle size of the carboxylic acid salt is greater than 1 ⁇ m.
  • Various methods of assessing particle size are known and all give slightly different results.
  • a size distribution is obtained by light scattering using a Malvern Mastersizer ® .
  • the volume average particle size is the average particle size at 50 per cent cumulative volume as determined from the distribution.
  • a Malvern Mastersizer ® model S with a 300 RF lens and MS17 sample presentation unit is used. This instrument, made by Malvern Instruments, Malvern, Worcestershire uses the principle of Fraunhofer diffraction, utilising a low power He/Ne laser.
  • the Malvern Mastersizer ® measures the volume particle size distribution of the material.
  • the volume average particle size (d 50 ) or 50 percentile is easily obtained from the data generated by the instrument. Other percentiles, such as the 90 percentile (d 90 ), are readily obtained.
  • the preferred amount of salt of a carboxylic acid is in the range 0.1 to 15 per cent by weight of the silicate composition, e.g. 0.5 to 10 per cent by weight.
  • Optimal amounts depend to some extent on the particle size of both the silicate and the salt of a carboxylic acid.
  • a granular alkali metal silicate having for instance an average particle size in the range 400 to 1000 ⁇ m can be mixed with about 0.5 to 5 weight per cent of a carboxylic acid salt having a volume average particle size below 30 ⁇ m to produce a silicate composition having good anti-caking properties.
  • the alkali metal silicate is a powder with a volume average particle size less than 150 ⁇ m, e.g. 40 to 150 ⁇ m
  • the preferred amount of salt of a carboxylic acid is in the range 1 to 10 per cent by weight of the composition. More preferably, for a powder silicate, the amount of carboxylic acid salt is in the range 1 to 5 per cent by weight.
  • the preferred amount is also dependent upon the particle size of the carboxylic acid salt.
  • the preferred amount for granular silicate e.g. a particle size ranging from 400 to 1000 ⁇ m
  • the preferred amount is in the range 2 to 4 per cent by weight of the composition.
  • the volume average particle size of the carboxylic acid salt is in the range 2 to 8 ⁇ m
  • the preferred amount is in the range 0.5 to 2 per cent by weight.
  • a powder silicate particle size less than 150 ⁇ m, e.g.
  • compositions in accordance of the invention may be prepared by mixing together the particulate alkali metal silicate (i.e. particles consisting essentially of alkali metal silicate) and the particulate carboxylic acid salt (i.e.
  • any suitable means can be used to mix the particulate materials, but it is believed that it is important to obtain a homogeneous mixture. There is usually a significant particle size difference between the salt of a carboxylic acid and the alkali metal silicate and this can lead to difficulty in obtaining a homogeneous mixture. It has been found that a gentle, but efficient, mixing, such as that provided by a Hobart mixer, is suitable for preparing compositions according to the invention.
  • silicates with particulate stearate salts were prepared by shaking 9.8 g of the silicate particles with 0.2 g of particulate stearate salts in a 50 cm 3 Sterilin sample tube for about 2 minutes.
  • the open sample tubes were then placed in a humidity cabinet at 70% relative humidity and 37° C for 4 days. They were inspected daily, when they were mixed by inversion to check for caking. The results obtained are given in Table 2 below.
  • Control samples of all the silicates without any added stearate salt were also placed in the humidity cabinet and became a glassy solid overnight.
  • Example 2 Silicate compositions were prepared by mixing 2940 g of P95 silicate powder or G91 granular sodium silicate with 60 g of sodium stearate with a volume average particle size of 8 ⁇ m in a Hobart mixer for 10 minutes on setting 2.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Detergent Compositions (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)

Abstract

A solid particulate alkali metal silicate composition comprises a mixture of a particulate alkali metal silicate and a particulate salt of a carboxylic acid having a carbon chain length in the range 6 to 24 carbon atoms, said salt of a carboxylic acid having a volume average particle size of less than 30 µm. This mixture has been found to be resistant to caking under humid conditions.

Description

SILICATE COMPOSITIONS
This invention relates to alkali metal silicate compositions and particularly to alkali metal silicate compositions which are resistant to caking.
Solid alkali metal silicates have found widespread use in many applications. One major application is as an additive for detergent compositions to provide, for example, anti- corrosion, building, soil suspension and bleach stabilising properties. In this application, it is important that the silicate dissolves rapidly when added to water. Unfortunately, alkali metal silicates which readily dissolve in water also frequently have a tendency to cake on exposure to humid conditions. This can create processing difficulties in the preparation of detergent compositions containing such silicates.
There is therefore a need for a solid alkali metal silicate composition which dissolves readily in water but is resistant to caking when handled in a humid atmosphere. It is an object of the current invention to provide such a solid silicate composition.
According to the invention a solid particulate alkali metal silicate composition comprises a mixture of a particulate alkali metal silicate and a particulate salt of a carboxylic acid having a carbon chain length in the range 6 to 24 carbon atoms, said salt of a carboxylic acid having a volume average particle size of less than 30 μm.
Also according to the invention there is provided a method for the preparation of a silicate composition comprising mixing a particulate alkali metal silicate, in particular particles consisting essentially of the alkali metal silicate, with a particulate salt of a carboxylic acid having a carbon chain length in the range 6 to 24 carbon atoms, said salt of a carboxylic acid having a volume average particle size of less than 30 μm.
Such a composition, in the form of a mixture consisting essentially of particles of alkali metal silicate in admixture with a particulate salt of a carboxylic acid, has been found to remain free-flowing when exposed in a sample tube to relatively high humidity over a prolonged period, whereas a similar silicate without any admixed carboxylic acid salt was converted into a solid tablet after exposure to the same humidity for a few hours and a wet solid glassy tablet within 24 hours.
According to another aspect of the present invention there is provided a caking-resistant, water soluble solid particulate material in the form of an alkali metal silicate composition comprising a mixture of: (a) particles consisting essentially of alkali metal silicate; and
(b) a particulate salt of a carboxylic acid having a carbon chain length in the range 6 to 24 carbon atoms, said salt of a carboxylic acid having a volume average particle size of less than 30 μm. The alkali metal silicate can be a silicate of any alkali metal but sodium and potassium silicates are preferred and most commonly it is a sodium silicate.
The invention is applicable to silicates having any molar ratio of Si02 : M20 (where M is an alkali metal) but is particularly useful for silicates having a relatively high solubility. In particular, the silicate preferably has a molar ratio of Si02 : M20 below 3.0 : 1 and, more preferably, below 2.5 : 1. Normally the silicate will have a molar ratio of Si02 : M20 greater than 1.5 : 1.
The invention can provide resistance to caking for alkali metal silicates with a wide range of particle sizes, for instance ranging up to about 1200 μm, typically from about 40 μm to 1200 μm, e.g. from about 40 μm to 1000 μm.
For example, commercially available granular alkali metal silicate having an average particle size (as determined by sieving) in the range from 150 to 1200 μm, typically from 250 to 1200 μm, e.g. from 400 to 1000 μm, is suitable for mixing with the carboxylic acid salt to provide a composition resistant to caking and the resistance to caking of powder alkali metal silicate having a volume average particle size below 150 μm has also been improved by the addition of carboxylic acid salt according to the invention. Normally, the volume average particle size of the silicate is greater than 40 μm. These two particle size ranges are typical of commercially available alkali metal silicate products but it is believed that the invention can be practised with silicates having a volume average particle size outside the above ranges.
Preferred salts of carboxylic acids are salts of Group I metals, Group II metals or zinc. Particularly useful salts are salts of sodium or magnesium.
The carboxylic acid is a saturated or unsaturated carboxylic acid. Preferably, it is a monocarboxylic acid having a chain length of 6 to 24 carbon atoms. Preferred salts are salts of monocarboxylic acids containing 10 to 24 carbon atoms and particularly preferred monocarboxylic acids contain 14 to 24 carbon atoms. Salts of stearic acid have been found to be particularly suitable for use in the invention. The volume average particle size of the salt of a carboxylic acid is less than 30 μm and preferably less than 20 μm. Normally, the volume average particle size of the carboxylic acid salt is greater than 1 μm. Various methods of assessing particle size are known and all give slightly different results. In the present invention, a size distribution is obtained by light scattering using a Malvern Mastersizer®. The volume average particle size is the average particle size at 50 per cent cumulative volume as determined from the distribution. A Malvern Mastersizer® model S, with a 300 RF lens and MS17 sample presentation unit is used. This instrument, made by Malvern Instruments, Malvern, Worcestershire uses the principle of Fraunhofer diffraction, utilising a low power He/Ne laser. The Malvern Mastersizer® measures the volume particle size distribution of the material. The volume average particle size (d50) or 50 percentile is easily obtained from the data generated by the instrument. Other percentiles, such as the 90 percentile (d90), are readily obtained.
The preferred amount of salt of a carboxylic acid is in the range 0.1 to 15 per cent by weight of the silicate composition, e.g. 0.5 to 10 per cent by weight.
Optimal amounts depend to some extent on the particle size of both the silicate and the salt of a carboxylic acid. A granular alkali metal silicate having for instance an average particle size in the range 400 to 1000 μm can be mixed with about 0.5 to 5 weight per cent of a carboxylic acid salt having a volume average particle size below 30 μm to produce a silicate composition having good anti-caking properties. When the alkali metal silicate is a powder with a volume average particle size less than 150 μm, e.g. 40 to 150 μm, the preferred amount of salt of a carboxylic acid is in the range 1 to 10 per cent by weight of the composition. More preferably, for a powder silicate, the amount of carboxylic acid salt is in the range 1 to 5 per cent by weight.
The preferred amount is also dependent upon the particle size of the carboxylic acid salt. When the carboxylic acid salt has a volume average particle size in the range 15 to 25 μm, the preferred amount for granular silicate (e.g. a particle size ranging from 400 to 1000 μm) is in the range 2 to 4 per cent by weight of the composition. When the volume average particle size of the carboxylic acid salt is in the range 2 to 8 μm the preferred amount is in the range 0.5 to 2 per cent by weight. Similarly, for a powder silicate (particle size less than 150 μm, e.g. 40 to 150 μm), the preferred amount of carboxylic acid salt with a volume average particle size in the range 15 to 25 μm is 4 to 5 per cent by weight, whereas, when the volume average particle size of the carboxylic acid salt is in the range 2 to 8 μm, the preferred amount is 1 to 2 per cent by weight of the composition. Compositions in accordance of the invention may be prepared by mixing together the particulate alkali metal silicate (i.e. particles consisting essentially of alkali metal silicate) and the particulate carboxylic acid salt (i.e. particles consisting essentially of the carboxylic acid salt) so as to produce a water soluble, caking resistant, free flowing, solid particulate composition consisting essentially of the alkali metal silicate and the carboxylic acid salt . Any suitable means can be used to mix the particulate materials, but it is believed that it is important to obtain a homogeneous mixture. There is usually a significant particle size difference between the salt of a carboxylic acid and the alkali metal silicate and this can lead to difficulty in obtaining a homogeneous mixture. It has been found that a gentle, but efficient, mixing, such as that provided by a Hobart mixer, is suitable for preparing compositions according to the invention.
The invention is illustrated by the following, non-limiting, examples.
EXAMPLES
Example 1
A number of different sodium silicate products, all available from INEOS Silicas Netherlands BV, under the brand name of Pyramid P for powder and Pyramid G for granular forms, were used to prepare silicate compositions. These sodium silicates had the properties shown in Table 1 below.
TABLE 1
Mixtures of these silicates with particulate stearate salts were prepared by shaking 9.8 g of the silicate particles with 0.2 g of particulate stearate salts in a 50 cm3 Sterilin sample tube for about 2 minutes. The open sample tubes were then placed in a humidity cabinet at 70% relative humidity and 37° C for 4 days. They were inspected daily, when they were mixed by inversion to check for caking. The results obtained are given in Table 2 below.
TABLE 2
Control samples of all the silicates without any added stearate salt were also placed in the humidity cabinet and became a glassy solid overnight.
Example 2 Silicate compositions were prepared by mixing 2940 g of P95 silicate powder or G91 granular sodium silicate with 60 g of sodium stearate with a volume average particle size of 8 μm in a Hobart mixer for 10 minutes on setting 2.
10 g samples of the compositions produced were placed in a humidity cabinet at 37° C aanndd 7700%% rreellaattiivvee hhuummiiddiittyy in an open 50 cm3 Sterilin sample tube for various times as indicated in Table 3 below.
The degree of caking was determined by gentle sieving of the samples (after storage) over a pre-weighed 1600 μm sieve for 1 minute. The fraction of the product which remained on the 1600 μm sieve was expressed as a percentage of the original weight. Results are given in Table 3 below for the samples prepared according to the invention ("modified") and for silicate samples which had not been mixed with sodium stearate. TABLE 3
SOLUBILITY TESTS
Solubility tests were carried out on P95, modified P95, G91 and modified G91 using the following procedure.
To 95 grams of stirred deionised water at 22° C, 5 grams of P95 were added and stirred for 10 minutes. The solution was filtered, washed and any residue left on the filter paper dried and weighed. The same experiment was repeated for modified P95, G91 and modified G91. The % solubility of each sample was determined from the following formula:
% Solubility = Weight of sample used - Weight of Residue x 100 Weight of Sample Used
Results of solubility test are given below:
Sample % Solubility
P95 99.9
Modified P95 99.6
G91 99.8
Modified G91 99.6
The above results clearly show that coating of powdered and granular forms of soluble silicate products with sodium stearate does not affect their solubility in water.

Claims

1. A solid particulate alkali metal silicate composition comprising a mixture of a particulate alkali metal silicate and a particulate salt of a carboxylic acid having a carbon chain length in the range 6 to 24 carbon atoms, said salt of a carboxylic acid having a volume average particle size of less than 30 μm.
2. A caking-resistant, water soluble, solid particulate material in the form of an alkali metal silicate composition comprising a mixture of:
(a) particles consisting essentially of alkali metal silicate; and
(b) a particulate salt of a carboxylic acid having a carbon chain length in the range 6 to 24 carbon atoms, said salt of a carboxylic acid having a volume average particle size of less than 30 μm.
3. The use, in the preparation of a detergent composition, of a composition containing an alkali metal silicate incorporated into the detergent composition in the form of a caking-resistant, water soluble material as claimed in claim 2.
4. The composition or use according to any one of the preceding claims characterised in that the alkali metal silicate is sodium silicate.
5. The composition or use according to any one of the preceding claims characterised in that the alkali metal silicate has a molar ratio Si02 : M20, where M is an alkali metal, of less than 3.0 : 1.
6. The composition or use according to any one of the preceding claims characterised in that the alkali metal silicate has an average particle size up to about 1200 μm.
7. The composition or use according to any one of the preceding claims characterised in that the alkali metal silicate has an average particle size in greater than 40 μm.
8. The composition or use according to any one of the preceding claims characterised in that the alkali metal silicate is a granular silicate with an average particle size in the range 250 to 1200 μm.
9. The composition or use according to any one of the preceding claims characterised in that the alkali metal silicate is a granular silicate with an average particle size in the range 400 to 1000 μm.
10. The composition or use according to any one of the preceding claims characterised in that the alkali metal silicate is a powder with a volume average particle size below 150 μm.
11. The composition or use according to Claim 10 characterised in that the alkali metal silicate is a powder with a volume average particle size greater than 40 μm.
12. The composition or use according to any one of the preceding claims characterised in that the salt of a carboxylic acid is a salt of a Group I metal, a salt of a Group II metal or a zinc salt.
13. The composition or use according to any one of the preceding claims characterised in that the carboxylic acid contains from 10 to 24 carbon atoms.
14. The composition or use according to any one of the preceding claims characterised in that the salt of a carboxylic acid is present in an amount in the range 0.1 to 15 per cent by weight of the silicate composition.
15. The composition or use according to claim 14 characterised in that the salt of a carboxylic acid is present in an amount of at least 0.5 per cent by weight of the silicate composition.
16. The composition or use according to claim 14 characterised in that the salt of a carboxylic acid is present in an amount of at least 1.0 per cent by weight of the silicate composition.
17. The composition or use according to claim 14 characterised in that the salt of a carboxylic acid is present in an amount of up to 10 per cent by weight of the silicate composition.
18. The composition or use according to claim 14 characterised in that the salt of a carboxylic acid is present in an amount of up to 5 per cent by weight of the silicate composition.
19. The composition or use according to any one of the preceding claims in which the carboxylic acid salt is a stearate.
20. The composition or use according to any one of the preceding claims in which the carboxylic acid salt is a sodium or magnesium salt.
21. A method for the preparation of a silicate composition comprising mixing a particulate alkali metal silicate and a particulate salt of a carboxylic acid having a carbon chain length in the range 6 to 24 carbon atoms, said salt of a carboxylic acid having a volume average particle size of less than 30 μm.
EP03775547A 2002-11-14 2003-11-13 Silicate compositions Withdrawn EP1562856A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB0226511.4A GB0226511D0 (en) 2002-11-14 2002-11-14 Silicate compositions
GB0226511 2002-11-14
PCT/GB2003/004922 WO2004043860A1 (en) 2002-11-14 2003-11-13 Silicate compositions

Publications (1)

Publication Number Publication Date
EP1562856A1 true EP1562856A1 (en) 2005-08-17

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Family Applications (1)

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EP03775547A Withdrawn EP1562856A1 (en) 2002-11-14 2003-11-13 Silicate compositions

Country Status (6)

Country Link
EP (1) EP1562856A1 (en)
JP (1) JP2006506303A (en)
KR (1) KR20050072142A (en)
AU (1) AU2003283571A1 (en)
GB (1) GB0226511D0 (en)
WO (1) WO2004043860A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA687526B (en) * 1965-07-30
IE38506B1 (en) * 1972-11-13 1978-03-29 Procter & Gamble Detergent compositions
GB0111043D0 (en) * 2001-05-08 2001-06-27 Ineos Silicas Ltd Granular compositions

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004043860A1 *

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Publication number Publication date
AU2003283571A1 (en) 2004-06-03
KR20050072142A (en) 2005-07-08
JP2006506303A (en) 2006-02-23
WO2004043860A1 (en) 2004-05-27
GB0226511D0 (en) 2002-12-18

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