Composite detergent granules and laundry compositions comprising the same

A detergent particle and composition technology, applied in the preparation of detergent mixture composition, detergent composition, coating detergent composition, etc., can solve the problem of low activity detergent agglomerates, alkyl ethoxylates Sulfate instability, low surfactant activity and other problems, to achieve excellent solubility characteristics, fast surfactant release, high surfactant activity effect

Inactive Publication Date: 2017-02-22
THE PROCTER & GAMBLE COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the detergent agglomerates so formed have relatively low surfactant activity, for example having a total surfactant content of not more than 50%
Such low active detergent agglomerates cannot meet the growing market demand for highly active detergents
Attempts to increase the total surfactant content in such low activity detergent agglomerates can be hampered by the fact that alkyl ethoxy sulphates are thermally unstable, which requires significantly large amounts of sodium carbonate to ensure its thermal stability limit

Method used

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  • Composite detergent granules and laundry compositions comprising the same
  • Composite detergent granules and laundry compositions comprising the same
  • Composite detergent granules and laundry compositions comprising the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Example 1: Method for preparing composite detergent particles

[0089] The composite detergent particles of the present invention can be carried out by the following exemplary methods:

[0090] The aqueous surfactant LAS slurry with about 78% detergent activity and about 21% water content is pumped into the product via a positive displacement pump at a rate of about 1.95 to 3.5 tons / hour. CB 55. The viscosity of the slurry is about 25000 cps at a temperature of about 70°C. At the same time, the aqueous AE1S surfactant slurry was pumped into the same mixer via a separate positive displacement pump at a rate of about 1.46-2.63 tons / hour. At the same time, a powder stream of silica (Evonik) is also fed at a rate of approximately 1.55 tons / hour CB55 mixer. Also flowing into the same mixer are two streams containing sorts of recycled agglomerates, one containing wet coarse particles and the other containing dry fine particles. The main flow of agglomerates leaving the CB55 ...

Embodiment 2

[0091] Example 2: Exemplary composite detergent particles

[0092] The following table shows exemplary composite detergent particles 1-3 according to the present invention.

[0093] Table I :

[0094]

[0095] *Commercially available from Evonik 340 silica

[0096] Weigh one hundred and seventy-seven grams (177g) of silica into a batch Tilt-a-pin mixer And mix in the mixer at 1200 rpm for about 2 seconds. Then up to about 222g to 400g of aqueous surfactant LAS slurry (having 78% detergent activity) and about 167g to 300g of AE1S slurry are injected into the mixer in continuous order at a rate of about 35-50ml / sec until All slurries are added. The mixture was then mixed for 2 seconds and then stopped and manually transferred to Tilt-a-Plow (Lodige). The mixture was then mixed at a rate of 240 rpm for 2 seconds and then about 56 g to 100 g AE1S was pumped into the mixer to form a layer on the agglomerates. The product was then transferred to a batch fluidized bed dryer, operated...

Embodiment 3

[0098] Example 3: Partially neutralized exemplary composite detergent particles

[0099] Table II :

[0100]

[0101] Weigh one hundred and four grams (104g) of silica and one hundred and six grams (106g) of carbonate into the batch Tilt-a-pin mixer And mix in the mixer at 650 rpm for about 2 seconds. Then up to about 90 grams of water-containing 50% partially neutralized LAS slurry (prepared by premixing 80 grams of HLAS (97% active HLAS) and 9.7 grams of caustic solution (50% NaOH active)) and 253 grams The AE1S slurry (having 78% detergent activity) is injected into the mixer in a continuous sequence at a rate of about 35-50 ml / sec until all the slurry is added. Then mix the mixture for 2 seconds, stop and transfer to Tilt-a-Plow manually The mixture was then mixed at a rate of 240 rpm for 2 seconds after which about 63 g of the same AE1S slurry was pumped into the mixer to form a layer on the agglomerates. The product was then transferred to a batch fluidized bed dryer, o...

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Abstract

This relates to a composite detergent granule having a core particle covered by a coating layer, as well as a granular detergent composition containing the same. The core particle contains a mixture of silica, a C10-C20 linear alkyl benzene sulphonate (LAS) and optionally a C10-C20 linear or branched alkylethoxy sulfate (AES).The coating layer contains AES. Such a composite detergent granule is characterized by high surfactant activity, improved water hardness tolerance, fast surfactant release, and superior dissolution profile.

Description

Technical field [0001] The present invention relates to granular detergent compositions comprising one or more detergent particles. Specifically, the present invention relates to a composite detergent particle having a core particle and a coating layer, which is characterized by high surfactant activity, improved water hardness resistance, rapid surfactant release, and excellent dissolution characteristics. Background technique [0002] Today's granular laundry detergent compositions may contain detergent particles formed by agglomeration methods or by spray drying methods. The agglomeration method can produce detergent particles with high concentrations of cleaning actives or surfactants that are particularly useful for forming laundry detergents with excellent cleaning performance. [0003] Currently available highly active agglomerated detergent particles are usually formed from linear alkylbenzene sulfonate surfactants. However, such surfactants have limited resistance to wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D17/06C11D1/22C11D1/14C11D1/12C11D3/08C11D3/04
CPCC11D1/22C11D17/0039C11D1/29C11D11/0088C11D17/06C11D1/37C11D3/124
Inventor 陈鸿兴耿代涛K·M·A·尚普关喆
Owner THE PROCTER & GAMBLE COMPANY
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