Detergent particles

a technology of detergent compositions and particles, applied in the field of laundry detergent compositions, can solve the problems of high cost of agglomeration of dry powder polymers, sticky detergent compositions, and high cost of detergent compositions

Inactive Publication Date: 2005-05-12
THE PROCTER & GAMBLE COMPANY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is then stated that in both cases the product has a number of undesirable characteristics: the powder formed by spray drying wet polymer is said to be hygroscopic and therefore tends to become sticky upon storage or in the final formulation.
The problem addressed is that of effectively dispersing zeolite in aqueous wash liquor in

Method used

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Examples

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examples

[0066] The following are examples of the invention.

example a

[0067]

TABLE 1% slurryRaw MaterialExample 1Example 2EDDS (ethylenediamine-2.8N,N′-disuccinic acid(S,S isomer) in the formof its sodium salt)MgSO41.1—Na2SO4—0.7Maleic acid / acrylic acid10.813.0copolymer (salt form)Sokalan CP5(tradename fromBASF)HEDP (1,1-5.63.1hydroxyethanediphosphonic acid)C12-18 alkyl benzene—3.1sulphonate (Na salt)LASSoap6.5—Zeolite (anhydrous37.030.4basis)Hexamethylene—2.5diaminetetra(ethoxylate24) diquatwith MeClMiscellaneous5.67.2Water30.640.0Total parts100.0100.0

[0068] homogeneous aqueous slurry of the components shown above was made up with the moisture content shown. The slurry was heated to 80° C. and fed under high pressure, (6,000-7,000 kPa), into a conventional counter-current spray drying tower with an air inlet temperature of 300-310° C. The atomised slurry was dried to produce a granular solid which was then cooled and sieved to remove oversize (>2 mm). Fine (<0.15 mm) material was elutriated with the exhaust air in the spray-drying tower and collected ...

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Abstract

The present invention relates to a method for making a laundry detergent particle comprising from 10 to 60 wt % (anhydrous basis) zeolite, from 12 to 75 wt % polycarboxylate polymer, and optional additional ingredients to 100% by weight, said method comprising preparing an aqueous slurry comprising zeolite, and polycarboxylate polymer and optional additional ingredients and spray drying the slurry. The weight ratio of zeolite (anhydrous basis) to polycarboxylate polymer in the slurry is from 4:1 to 1:2. The particles have been found to reduce caking of detergent product whilst providing improved cleaning compared with the addition of the polycarboxylate polymer as a separate granule. The invention also includes detergent compositions comprising such particles. The particles may be incorporated into a finished detergent composition as part of an agglomerate or extrudate.

Description

CROSS REFERENCE TO RELATED APPLICATION [0001] This application claims priority under 35 U.S.C. § 119(e) to European Patent Office Serial No. 03257082.2 filed Nov. 10, 2003.TECHNICAL FIELD [0002] The present invention relates to the field of laundry detergent compositions and in particular to methods for making particles which comprise polymer and which are suitable for use in laundry detergent compositions. BACKGROUND OF THE INVENTION AND PRIOR ART [0003] It is often desirable to incorporate polycarboxylate polymers into detergent compositions as part of an effective builder system. They are available from suppliers as powder, in solution or in granular form. EP-A-421664 states that these types of polymers are generally added to detergent formulations either in the form of a dried powder that is formed by spray-drying a solution, dispersion, slurry or emulsion of polymer in a liquid (“wet polymer”), or directly as wet polymer to a detergent formulation in slurry form before drying. ...

Claims

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Application Information

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IPC IPC(8): C11D3/02C11D3/12C11D3/37C11D11/02
CPCC11D3/046C11D11/02C11D3/3761C11D3/128
Inventor CALDWELL, STUART ANDREWTURNBULL, NICHOLAS ALEXANDER
Owner THE PROCTER & GAMBLE COMPANY
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