DE69938341T2 - GEARED GRANULAR COMPOSITION FOR USE IN PARTICULATE DETERGENTS - Google Patents

Description

Technical area

The The present invention relates to a fast dissolving, low -staining granular Composition that is visually distinguishable, for example colored or fluorescent ingredient, for example a photo-bleach, contains. The invention relates to specific granules containing a colored or fluorescent Component contained in a detergent composition without the problem of staining from the textile during the laundry to encounter, can be incorporated.

Background and state of the art

Colored speckles are used in detergent formulations to make a distinguishable To give appearance of the product as well as to give functional advantages. In the washing process, it is undesirable that these colored speckles on the textile surface settle for staining or staining of the textile leads. It has also been noted that these stains on subsequent washing do not go out. Furthermore could the uneven concentration from these speckles on the substrate in locally higher proportions of the active ingredient fabric damage cause.

U.S. 4,097,418 (Procter & Gamble, 1978) discloses granular colored speckles having non-staining properties comprising an agglomerate of a granular water-soluble inorganic alkaline salt with an anionic surfactant containing a dye or pigment. Mixing the dye and the anionic surfactant prior to agglomeration prevents the pigment particles from sticking to each other and to the fabric surface, thus preventing the dye from staining the fabric.

U.S. 4,762,636 (Ciba-Geigy, 1988) discloses a method of recovering granules having defined physical properties that float on an aqueous treatment liquid and release the active ingredient without being deposited on the substrate.

Brief description of the invention

It Thus, it is an object of the present invention to provide a granular composition to provide a colored or fluorescent ingredient incorporated in a detergent composition, without the problem of staining from the textile during the laundry to encounter, can be incorporated.

It Another object of the invention is a granular composition not with a superior staining To provide property produced by a process which is more economical and has lower capital costs, as compared with the known method.

• (a) einen gefärbten oder fluoreszierenden Bestandteil;
• (b) Zitronensäure als ein Trägermaterial für den gefärbten oder fluoreszierenden Bestandteil;
• (c) ein in Wasser lösliches oder in Wasser dispergierbares Sperrmaterial und
• (d) ein anorganisches Fließmodifizierungsmittel.

Thus, the present invention provides a granular composition suitable for incorporation into a particulate detergent composition, the granular composition comprising:

• (a) a colored or fluorescent ingredient;
• (b) citric acid as a carrier for the colored or fluorescent ingredient;
• (c) a water-soluble or water-dispersible barrier material and
• (d) an inorganic flow modifier.

The soluble in water or water-dispersible barrier material serves to provide a protective layer or coating on the combination of the colored or fluorescent ingredient and its carrier material, citric acid. Preferably Thus, at least a portion of the inorganic flow modifier becomes also protected. additionally may also be inorganic flow modifier, that is not protected by the barrier material.

Of the The term coating as used above does not necessarily imply full Coating.

• – der gefärbte oder fluoreszierende Bestandteil auf der Zitronensäure oder in der Form einer Beschichtung darüber dispergiert,
• – die Zitronensäure, die den gefärbten oder fluoreszierenden Bestandteil trägt, in Anmischung mit dem Fließmodifizierungsmittel oder einem Teil davon,
• – das Sperrmaterial in der Form von einer Beschichtung über dem Gemisch von Zitronensäure und Fließmodifizierungsmittel, das kombiniert ist mit (in Anmischung mit) jedem verbleibenden Anteil des Fließmodifizierungsmittels.

Therefore, according to a preferred embodiment of the invention

• The colored or fluorescent constituent is dispersed on the citric acid or in the form of a coating over it,
• The citric acid carrying the colored or fluorescent component in admixture with the flow modifier or a part thereof,
• The barrier material in the form of a coating over the mixture of citric acid and flow modifier combined with any remaining portion of the flow modifier (in admixture with).

• – 40 bis 90 Gew.-%, vorzugsweise 60 bis 80 Gew.-% Zitronensäure;
• – 0,5 bis 5 Gew.-%, vorzugsweise 1 bis 2 Gew.-% von dem gefärbten oder fluoreszierenden Bestandteil;
• – 10 bis 50 Gew.-%, vorzugsweise 18 bis 40 Gew.-% von dem anorganischen Fließmodifizierungsmittel und
• – 0,5 bis 5 Gew.-%, vorzugsweise 1 bis 3 Gew.-% von dem in Wasser löslichen Sperrmaterial.

According to another preferred aspect of the invention, the granular composition comprises:

• 40 to 90% by weight, preferably 60 to 80% by weight, of citric acid;
• From 0.5 to 5% by weight, preferably from 1 to 2% by weight of the colored or fluorescent constituent;
• From 10 to 50% by weight, preferably from 18 to 40% by weight, of the inorganic flow modifier and
• - 0.5 to 5 wt .-%, preferably 1 to 3 wt .-% of the water-soluble barrier material.

The granular composition according to the invention can be prepared by a process wherein the colored or fluorescent ingredient is dispersed on the citric acid, which is then with part or all of the inorganic flow modifier is mixed and the whole is treated with the barrier material, then granulated with any remaining inorganic flow modifier becomes.

• (i) Dispergieren des gefärbten oder fluoreszierenden Bestandteils auf der Zitronensäure und Granulieren mit dem anorganischen Fließmodifizierungsmittel oder einem Teil davon;
• (ii) Trocknen des Materials, vorzugsweise bei einer Temperatur innerhalb des Bereichs von 15 bis 50°C, bevorzugter 20 bis 40°C;
• (iii) Behandeln des getrockneten Materials mit dem in Wasser löslichen oder mit Wasser dispergierbaren Sperrmaterial;
• (iv) gegebenenfalls Granulieren des behandelten Materials mit dem verbleibenden Fließhilfsmodifizierungsmittel und Trocknen.

According to a further aspect of the invention there is therefore provided a process for the preparation of a granule composition comprising the steps of:

• (i) dispersing the colored or fluorescent component on the citric acid and granulating with the inorganic flow modifier or a portion thereof;
• (ii) drying the material, preferably at a temperature within the range of 15 to 50 ° C, more preferably 20 to 40 ° C;
• (iii) treating the dried material with the water-soluble or water-dispersible barrier material;
• (iv) optionally granulating the treated material with the remaining flow aid modifier and drying.

Examples for colored or fluorescent components are photoactivators (also known as a photo-bleach), especially phthalocyanines; colored dyes and pigments; fluorescent whitening agents and mixtures thereof. Particularly preferred constituents are the photo-bleaching agents zinc and aluminum phthalocyanine sulfonates.

The inorganic flow modifier can be selected of kaolin (preferably washed kaolin), silica, precipitated Silica, precipitated Calcium carbonate and diatoms / silica. The kaolin, silicon dioxide and mixtures thereof are particularly preferred.

The soluble in water or water-dispersible, preferably water-soluble, barrier material suitably from water-soluble Strengthen, Polyvinyl alcohols, polyethylene glycols and latex may be selected. Preferred materials are starches and polyvinyl alcohols.

As indicated above the granules of the invention by dispersing the colored or fluorescent ingredient on the citric acid in one rotating Pfannengranulator and then or simultane- ously adding a suitable flow modifier getting produced. The resulting agglomerate is dried and with the water-soluble or further coated with water-dispersible barrier material and optionally granulated with further flow modifier and dried.

One Another object of the invention is a particulate detergent composition, comprising organic detergent surfactants and other detergent ingredients and comprising a granular composition as defined above. The particulate laundry detergent composition The invention may suitably be 5 to 60% by weight of organic Surfactant, 10 to 80% by weight detergency builder, 0.1 to 10% by weight, preferably 0.5 to 5% by weight of a granular composition as above defined, and optionally other detergent ingredients 100 wt .-% include.

The Invention will now continue with the aid of the following non-limiting Examples are explained in which Part and percentages by weight, unless stated otherwise. Examples that by a number are according to the invention, while examples, which are denoted by a letter, for comparison.

EXAMPLE 1, COMPARATIVE EXAMPLES A to B C MANUFACTURE OF GRANULARS Compositions

Example 1: Photobleach granules using citric acid carrier and Strength barrier material

8th kg of citric acid were placed in a rotating pan granulator and 200 g Aluminiumphthalocyaninsulfonatlösung (10% concentration) were sprayed on. During the spraying was the half the amount of a mixture of 0.8 kg of kaolin and 500 g of silica added. The material was dried at 40 ° C for about 4 hours. The material was then returned placed in the rotating pan granulator and 500 g of starch solution (concentration 10% by weight) were sprayed thereon. Half of the Balance of the mixture of kaolin and silica was added. The material was dried for 4 hours at 40 ° C.

The formulation of the granular material was as follows: Starting material (g) Final formulation (% by weight) aluminum phthalocyanine 20 2 citric acid 8000 80 kaolin 800 8th silica 500 5 Strength 50 0.5 Water to 100% 630 4.5

Example 2: Photobleach granules using citric acid carrier and Polyvinylalkoholsperrmaterial

Photo bleach granules were prepared as in Example 1 except that the starch solution was filtered through polyvinyl alcohol solution (conc 10% by weight).

The final formulation of the granular material was as follows: Starting material (g) Final formulation (% by weight) aluminum phthalocyanine 20 2 citric acid 8000 80 kaolin 800 8th silica 500 5 polyvinyl alcohol 50 0.5 Water to 100% 630 4.5

Comparative Example A

granules were prepared by the method of Example 1, but using made of soda ash instead of citric acid.

Comparative Example B

granules were prepared by the method of Example 1, but under Use of sodium tripolyphosphate instead of citric acid.

washing protocol

• Beispiel 1
• Vergleichsbeispiel A
• Vergleichsbeispiel B
• Vergleichsbeispiel C: kommerziell erhältliche blaue Sprenkel Landrosil (Handelsmarke) PRT-2 von Sud-Chemie, enthaltend Aluminiumphthalocyaninsulfonat auf einem Bentonittonträger gegeben.

Ten inch x 10 inch (25.4 cm x 25.4 cm) cotton fabric pieces were placed in trays together with 2 kg of water and one of the following photo-bleach compositions:

• example 1
• Comparative Example A
• Comparative Example B
• Comparative Example C: commercially available blue speckles Landrosil (Trade Mark) PRT-2 from Sud-Chemie containing aluminum phthalocyanine sulfonate on a bentonite clay carrier.

Each piece of textile was soaked for 30 minutes. Later, the textile was washed under running water and dried in the sun. Four repetitions were retained for each treatment. A group of trained members visually analyzed the fabric for bruises on a scale of 0 to 5 as follows: reviews Anfärbungsniveau 0-1 minimal / negligible 2-3 perceptible 4-5 significant blue staining

The data were analyzed statistically and are shown in the table below. example Carrier material in photobleach granules Average rating 1 citric acid 0.9 A Calcined soda 2.9 B sodium tripolyphosphate 4.8 C commercially 4.5 CD at 99% 0.71

The Data presented in the table show that the commercial available Granulate the textile considerably stain at, while the application of the granules of the invention a simple superior Effect when fighting staining from the textile had. This is further supported by the fact that Granules made by the same process, however by replacing the citric acid with calcined soda or sodium tripolyphosphate staining the Textile not significantly prevented.

Examples 3 and 4: Detergent compositions

Granular detergent compositions were prepared by dry blending the following formulations: Linear alkyl benzene sulfonate 30 sodium 20 sodium tripolyphosphate 40 Photobleach granules (see below) 2 Enzymes, perfume, fluorescers, water, etc. on 100

The Detergent composition of Example 3 contained the photobleach granules of Example 1 (citric acid carrier, starch carrier material).

The Detergent composition of Example 4 contained the photobleach granules of Example 2 (citric acid carrier, polyvinyl alcohol carrier material).

Both detergent compositions were stored in 500 g sachets from May to December under the following conditions reflecting summer, monsoon and winter conditions in India: Temperature (° C) Relative humidity (%) room temperature 35 80 hot and dry 42 45 hot and wet 42 85

At the end of the storage period, no instability as indicated by visual examination true, be proven.

Claims (12)

A granular composition suitable for incorporation into a particulate detergent composition, the granular composition comprising: (a) a colored or fluorescent ingredient; (b) a carrier material for the colored or fluorescent ingredient; characterized in that the carrier material (b) is citric acid and the granular composition further comprises: (c) a water-soluble or water-dispersible barrier material; and (d) an inorganic flow modifier. granular Composition according to claim 1, characterized in that: - the colored or fluorescent constituent (a) on the citric acid (b), in admixture with the inorganic flow modifier (d) or a part thereof is dispersed or in the form of a coating about that and - the Barrier material (c) in the form of a coating over the Mixture of coated citric acid and inorganic flow modifier is present, wherein the coated mixture in admixture with any remaining inorganic flow modifier (d) is present. granular Composition according to any preceding claim, characterized that it includes: (a) 0.5 to 5% by weight, preferably 1 to 2 wt .-% of the dyed or fluorescent ingredient; (b) 40 to 90% by weight, preferably 60 to 80% by weight of citric acid; (C) 0.5 to 5 wt .-%, preferably 1 to 3 wt .-% of that in water soluble or water-dispersible barrier material; (d) 10 to 50 Wt .-%, preferably 18 to 40 wt .-% of the inorganic flow modifier. granular Composition according to any preceding claim, characterized that the colored or fluorescent constituent (a) from photo activators (photo-bleaches), Pigments, dyes and fluorescent whitening agents. granular Composition according to Claim 4, characterized in that the colored or fluorescent component (a) a zinc or aluminum phthalocyanine sulfonate represents. granular Composition according to any preceding claim, characterized that is soluble in water or water-dispersible barrier material (c) of water-soluble Strengthen, Polyvinyl alcohols, polyethylene glycols and latexes is selected. granular Composition according to Claim 6, characterized in that the Barrier material (c) soluble in water is and a strength or a polyvinyl alcohol. granular Composition according to any preceding claim, characterized that the inorganic flow modifier (d) of kaolin, silica, precipitated silica, precipitated calcium carbonate and diatomaceous earth or silica is selected. granular Composition according to Claim 8, characterized in that the inorganic flow modifier (d) kaolin, silica or a mixture thereof. particulate Laundry detergent composition from 5 to 60% by weight of organic surfactant, from 10 to 80% by weight of detergency builder and optionally other detergent ingredients up to 100% by weight characterized in that it is 0.1 to 10 wt .-%, preferably 0.5 to 5% by weight of one as in any one of claims 1 to 11 claimed granular Composition includes. A process for producing a granular composition according to claim 1, characterized in that it comprises the steps of: (i) dispersing the colored or fluorescent component (a) on the citric acid (b) and granulating with a part or the whole of the inorganic flow modifier (d); (ii) drying the granular material thus obtained; (iii) treating the dried material with the water-soluble or water-dispersible barrier material (c); (iv) optionally granulating the thus obtained treated material with any remaining inorganic flow modifier (d) and drying. Method according to claim 11, characterized in that that the drying step (iii) at a temperature within the range of 15 to 50 ° C, preferably 20 to 40 ° C, accomplished becomes.