EP0238341A2
Expired / Lapsed
EP
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Granular bleach activator compositions
Assignee: CLAIREHOME Ltd
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Filing: 1987-03-19
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Granted: —
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Expires: 2007-03-19
Abstract
Abstract A granular bleach activator composition containing an organic binder is disclosed which has improved low temperature release properties by incorporating a water-soluble granule disintegration aid usually a sequestering agent, e.g. a phosphonate suitably in combination with an inorganic salt. A process for producing the granules comprising forming a dry blend of particles of binder and bleach activator and moistening the blend during mixing with aqueous solution of the granule disintegration acid.
Inventors
- 👤 John Townend
- 👤 Anthony John Gradwell
- 👤 John David Withenshaw
- 👤 Rudolph Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 03:11
CPC Classifications
C; C11; C11D; C11D17/00; C11D17/06; C11D3/00; C11D3/39; C11D3/3902
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
70 words
A granulated bleach activator composition that comprises granules comprising the activator in particulate form bonded by an organic binder, characterised in that the granules contain a water soluble granule disintegration aid and in that the 2 minute activity of the composition when dissolved in water at 20°C containing perborate and a detergent base is more than 1.3 times and up to about 5 times the activity of the standard composition.
Claim 2
Dependent Claim
70 words
A granulated bleach activator composition that comprises granules comprising the activator in particulate form bonded by an organic binder, characterised in that the granules contain a water soluble granule disintegration aid and in that the 2 minute activity of the composition when dissolved in water at 20°C containing perborate and a detergent base is more than 1.3 times and up to about 5 times the activity of the standard composition.
Claim 3
Dependent Claim
31 words
A composition according to claim 1 in which said 2 minute activity at 20°C is in the range of about 1.5 to about 3.0 times the activity of the standard composition.
Claim 4
Dependent Claim
60 words
A composition according to claim 1 or claim 2 further characterised in that the 30 minute activity of the composition when dissolved in water and at 40°C containing perborate is more than 2 times and up to about 50 times the activity of the standard composition, preferably more than about 4, more preferably more than about 10 times that activity.
Claim 5
Dependent Claim
60 words
A composition according to any preceding claim further characterised in that the 5 minute activity of the composition when dissolved in water at 40°C containing perborate is more than 1.2 times and up to about 5 times the activity of the standard composition, preferably more than 1.5 times and more preferably in the range 1.7 to 2.5 times that activity.
Claim 6
Dependent Claim
16 words
A composition according to any preceding claim in which the disintegration aid comprises a sequestering agent.
Claim 7
Dependent Claim
39 words
A composition according to claim 5 in which the granule disintegration aid is selected from amino carboxylic acids, phosphonic acids and low molecular weight anionic polymers formed from ethylenically unsaturated monomers, and is preferably a phosphonic acid sequestering agent.
Claim 8
Dependent Claim
22 words
7 . A composition according to claim 5 or claim 6 in which the granule disintegration aid also comprises an inorganic salt.
Claim 9
Dependent Claim
68 words
A composition according to any preceding claim in which the weight ratio of activator: binder is in the range of from 98:2 to 30:70, preferably from 89:11 to 50:50 or to 55:45, and in which the amount of granule disintegration aid is in the range of from 1 to 20 % by weight of the total weight of activator, binder and granule disintegration aid, preferably 1 to 15%.
Claim 10
Dependent Claim
21 words
A composition according to any preceding claim in which the binder is selected from starch and cellulose binders, preferably carboxymethyl cellulose.
Claim 11
Dependent Claim
35 words
A composition according to any preceding claim in which the granules consist substantially only of the activator, binder, disintegration aid and O to 10% of other components optionally including optical brightening agent(s) and/or anti-sudsing agents.
Claim 12
Dependent Claim
16 words
A composition according to any preceding claim in which the activator is tetra acetyl ethylene diamine.
Claim 13
Dependent Claim
59 words
A composition according to any preceding claim in which the activator is initially provided in the form of particles having sizes in the range from 100 to 300 microns in size and the granules have an average particle size in the range of 300 to 1500 microns with substantially none of the granules having a size above 1700 microns.
Claim 14
Dependent Claim
45 words
A process for the production of a granulated bleach activator in which particles of organic binder material and particles of bleach activator are dry blended, moistened during mixing by an aqueous solution and dried, characterised in that the solution comprises dissolved water-soluble granule disintegration aid.
Claim 15
Dependent Claim
45 words
A process for the production of a granulated bleach activator in which particles of organic binder material and particles of bleach activator are dry blended, moistened during mixing by an aqueous solution and dried, characterised in that the solution comprises dissolved water-soluble granule disintegration aid.
Claim 16
Dependent Claim
17 words
A process according to claim 13 in which the solution is substantially free of organic binder material.
Claim 17
Dependent Claim
26 words
A process according to claim 13 or claim 14 in which substantially all of the water soluble granule disintegration aid is dissolved in the aqueous solution.
Claim 18
Dependent Claim
24 words
A process according to any of claim 13 to 15 in which a product according to any of claims 1 to 12 is produced.
Claim 19
Dependent Claim
36 words
A granule detergent composition containing a composition according to any of claims 1 to 12 or the product of a process according to any of claims 13 to 16, a detergent component and a bleach component.
References Cited (Backward Citations)
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