ES2665443T3 - Colorless laundry additive material for the promotion of antiredeposition of particulate dirt - Google Patents

Abstract

A colorless laundry additive material to promote antiredeposition of particulate soils, the material having a maximum extinction coefficient in L mol-1 cm-1 of less than 800, preferably less than 100, in the wavelength range 400 to 750 nm and comprising at least two polyalkoxylated polyethyleneimines, which may be the same or different, cross-linked to each other by a colorless difunctional aromatic cross-linking agent that also has a maximum extinction coefficient in L mol-1 cm-1 of less 800, preferably less than 100, in the wavelength range of 400 to 750 nm, where said crosslinking agent contains an aromatic group comprising at least one aromatic ring and two reactive groups selected from -SO2CH2CH2OSO3Na and NHCOCH> = CH2 .

Description

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5

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Bleaching catalyst

The compositions may comprise a weight efficient bleaching system. Such systems typically do not use the conventional percarbonate and bleach activator approach. An air bleach catalyst system is preferred. Suitable complexes and precursors of organic molecules (ligand) to form complexes are available to those skilled in the art, for example, from documents: WO 98/39098; WO 98/39406, WO 97/48787, WO 00/29537; WO 00/52124 and WO00 / 60045, incorporated by reference. An example of a preferred catalyst is a transition metal complex of the MeN4Py ligand (N, N-bis (pyridin-2-yl-methyl) -1-, 1-bis (pyridin-2-yl) -1-aminoethane) . Suitable bispidon catalyst materials and their action are described in WO02 / 48301. The bleach catalyst may be encapsulated to reduce interaction with other components of the liquid during storage.

Photo bleachers can also be used. A "photobleach" is any chemical species that forms a reactive bleaching species when exposed to sunlight, and preferably is not consumed permanently in the reaction. Preferred photobleachers include individual oxygen bleachers and radical photobleachers. Suitable individual oxygen photobleach can be selected from water soluble phthalocyanine compounds, particularly metallized phthalocyanine compounds where the metal is Zn or Al-Z1 where Z1 is a halide, sulfate, nitrate, carboxylate, alkanolate or hydroxyl ion. Preferably, the phthalocyanine has 1-4 SO3X groups covalently bonded thereto, where X is an alkali metal or ammonium ion. Such compounds are described in WO2005 / 014769 (Ciba).

When present, the bleach catalyst is typically incorporated at a level of about 0.0001 to about 10% by weight, preferably from about 0.001 to about 5% by weight.

Fragrance

The composition will usually include one or more perfume components. Free oil and encapsulated perfumes, and mixtures thereof can be used.

A particularly preferred way to ensure that the perfume is used efficiently is to use an encapsulated perfume. The use of a perfume that is encapsulated reduces the amount of perfume vapor produced by the composition before it is diluted. This is important when the perfume concentration is increased to allow the amount of perfume per wash to be maintained at a reasonably high level.

It is even more preferable that the perfume is not only encapsulated but also that the encapsulated perfume be provided with a deposition aid to increase the efficiency of deposition and retention of the perfume on the fabrics. The deposition aid is preferably attached to the encapsulation by means of a covalent bond, entanglement or strong adsorption.

Other optional ingredients

The compositions may contain one or more other ingredients. Such ingredients include viscosity modifiers, foam enhancing agents, preservatives (for example, bactericides), pH buffering agents, polyelectrolytes, anti-shrinking agents, anti-wrinkle agents, antioxidants, sunscreens, anti-corrosion agents, covering agents, antistatic agents and ironing assistants. The compositions may further comprise dyes, pearls and / or opacifiers, and shading dyes.

Shader dyes

The shading dye can be used to improve the performance of the compositions. Preferred dyes are violet or blue. It is believed that the deposition on the fabrics of the low level of the dyeing of these shades masks the yellowing of the fabrics. An additional advantage of shading dyes is that they can be used to mask any yellow dye in the composition itself. Examples of shading dyes are alkoxylated thiophene dyes, acid violet 50, direct violet 35, direct violet 99, direct violet 9, solvent violet 13, dispersed violet 28, dispersed blue 165.

The shader dye can be used in the absence of a fluorescent agent, but it is especially preferred to use a shader dye in combination with a fluorescent agent, for example to reduce yellowing due to chemical changes in the adsorbed fluorescent.

Detergency aids and sequestrants

The detergent compositions may also optionally contain relatively low levels of detergent adjuvant material or organic detergent sequestrant. Examples include alkali metal, citrates, succinates, malonates, carboxymethyl succinates, carboxylates, polycarboxylates and polyacetyl carboxylates. Specific examples include sodium, potassium and lithium salts of oxidisuccinic acid, melitic acid, benzene acids

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Name of resulting polymer (ARP)

Aromatic crosslinking agent (ACL)

CLAP 2

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CLAP 3

CLAP 4

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5 NB CLAP 4 is a cross-linked EPEI without any sulphonate.

By using the nomenclature:

CL = Crosslinking Agent

PEI = PEI 10

(EO) nOH = ethoxylate chain

PEI (EO) nOH + CL> PEI (EO) nO-CL-O (EO) nPEI.

Typically, one is added to the double bonds of the crosslinking agent. For vinyl sulfone, it loses the sulfone group in high pH to give an alkene, which then reacts.

In all cases, 5% by weight of the crosslinking agent was mixed with the standard polymer for 4 days at 293 K. For CLAP 1, CLAP 2 and CLAP 3, the aqueous solution was heated to 333 K and stirred for 3 hours; then the temperature was raised to 353 K and the solution was stirred for a further 24 hours and cooled before use. For CLAP 4, the solution was then heated to 333 K and stirred for 3 hours, then 2.5% by weight Na2CO3 was added and stirred at

20 333 K for an additional 24 hours, cooled and used.

The polymers were added to the base detergent composition given in Table 2 at levels of 0.44 and 3.5% by weight to prepare detergent compositions A and B.

Table 2

% in weigh

Nalas

4.9

% in weigh

NI (7EO)

7.3

SLES (3EO)

2.4

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Claims (1)

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