CZ409798A3 - Preparation for cleansing cloakrooms - Google Patents

Abstract

Improved foam behaviour and a reduction in stickiness during manufacture is shown in lavatory blocks which comprise 2-15 wt.% of oily liquid perfume, 2-30 wt.% of halogen bleaching agent, 3-15 wt.% of primary alkyl sulphate, and, 15-50 wt.% of alkyl benzene sulphonate.

Description

The invention relates to a means for cleaning toilets to be placed under the rim of a bowl or in a water tank.

Current state of the art

Toilet cleaning agents are known, which are designed to be placed under the edge of the bowl, so that during flushing, the water from the reservoir flows over these agents and a certain proportion of such agent dissolves. Furthermore, there are known means for cleaning the water reservoir, which slowly dissolve in the water contained in the reservoir.

Said means create foam, often create a pleasant smell and may also have bactericidal means. This effect can be caused by bleaching substances, for example, substances from which chlorine is released, another type is agents that can release oxygen, for example, from peroxides or also quaternary ammonium compounds or halogenated materials that do not release chlorine salts when used.

International patent application WO 92/03532 (Jeyes) describes a composition comprising a wetting agent and a dissolution retarding component or filler. Typically, an anionic wetting agent is used as a wetting agent in an amount of 5 to 85% by weight, based on the total weight of the composition.

A variety of anionic wetting agents are used for agents placed under the edge of the bowl. For example, it is a mixture of two or more primary PAS alkyl sulfates, alkyl sulfates • 9

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AS, optionally with a branched chain, secondary alkyl sulfates SAS, alkyl ether sulfates AES and alkylbenzene sulfonates LAS or can be essentially pure wetting agents. According to US 4,874,536, AS/LAS type mixtures can be used in compositions that are free of oxygen-containing bleaching agents. International patent application WO 95/11958 describes the use of PAS/AES mixtures, again in bleach-free compositions. According to WO 96/14 392, it is possible to use mixtures of the EAS/LAS type, again in compositions free of bleaches. EP 619 367 describes the presence of a PAS/LES mixture in bleach-free compositions. Similarly, EP 184 416 describes a LAS/PAS mixture used in preparations without bleaches. In addition, FG 2 169 612 describes the use of LAS/PAS in compositions containing no bleach, and GB 2 178 442 describes the use of LAS/PAS in compositions containing two halogen-based bleaches.

In EP 462 643 (Unilever) it is described how it is possible to improve compositions in the form of blocks containing halogen-based bleaches by adding a liquid perfume in the form of oil to the mixture for the production of these compositions. It has been found that there is a problem associated with the production of such products, which is that in the presence of bleaching agents, a relatively large amount of perfume must be used to ensure stability for a longer period of time. In addition, the bleaching agent also replaces the proportion of filler that is usually present. The presence of perfume and bleach results in a sticky composition, which is then difficult to process by extrusion, usually used to produce these compositions in the form of blocks.

A product of this type should produce a rich lather for at least the first 50 to 80 flushes after being put in place, and should continue to produce lather for a longer part of the product's life.

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It has now been found that improved sudsability and/or substantial reduction in stickiness of bleach and perfume compositions can be achieved using a certain wetting system which contains primary alkyl sulfate PAS along with alkyl benzene sulfonate LAS in certain amounts.

The essence of the invention

The essence of the invention is a means for cleaning toilets in the form of blocks, which contains

a) 2 to 15% by weight of liquid perfume in the form of oil,

b) 2 to 30% by weight of halogen-based bleach,

c) 3 to 15% by weight of primary alkyl sulfate a

d) 15 to 50% by weight of alkylbenzene sulfonate.

Without being bound by theoretical considerations, it is likely that PAS and LAS will form a phase capable of adsorbing a certain proportion of the perfume present and preventing stickiness. In this way, the production of means of this type by extrusion in the form of a rod, which is then divided into individual blocks, will be facilitated. The combination of PAS and ABS probably also promotes foaming and perfume release from the block.

According to one of the embodiments of the invention, in the production of a means for cleaning toilets in the form of a block containing 2 to 15% by weight of liquid perfume in the form of oil and 2 to 30% by weight of halogen-based bleach, 3 to 15% by weight of primary alkyl sulfate and 15 up to 50% by weight of alkylbenzene sulfonate.

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A preferred ratio of primary alkyl sulfate to alkylbenzene sulfonate, PAS: LAS is 1:1 to 1:5, preferably approximately 1:3. A particularly suitable material is PAS with an average alkyl chain length of 10 to 16 carbon atoms and alkylbenzene sulfonate also with an average alkyl chain length of 10 up to 16 carbon atoms.

The toilet cleaning compositions according to the invention in the form of blocks preferably contain less than 5% by weight of another wetting agent and are particularly preferably free of any other wetting agent.

The material for the production of these blocks may further contain means to facilitate processing during extrusion. It can be oils, namely mineral and silicone oils, esters, for example methyl decanoate, liquid ketones, such as 2-decanone, liquid tertiary alcohols, such as 2-methylhexan-2-ol or polybutene. A suitable agent is an alkoxylated alcohol, in a preferred embodiment it is an ethoxylated alcohol. This alkylated alcohol is preferably used in an amount of 0.75 to 2% by weight. The ethoxylated chain preferably has a length of 40 to 60 carbon atoms, preferably 50 carbon atoms. Suitable materials include Empilan KM 50/KF (TM) (Alhright and Wilson). Another useful processing aid is PEG-monostearate. A suitable material is, for example, PEG 4000 Monostearate (100%) (DAC). Advantageously, however, the compositions according to the invention are free of the mentioned compositions to facilitate processing.

Means for cleaning toilets in the form of blocks according to the invention typically contain 0 to 50% by weight of inert filler and/or filler in the form of an electrolyte. It is preferably 5 to 50% by weight of the filler. Suitable fillers are, for example, ionic soluble fillers and also inert insoluble fillers. Suitable fillers include urea , sodium, magnesium and calcium carbonates, sodium chloride, borax, talc and sodium, magnesium or calcium sulphate. Preferred ionic fillers are sodium sulfate in particular. The advantage of adding at least some of the soluble salts of barium, cadmium, copper, iron, manganese or nickel to modify the service life of the product has been proven.

A preferred inert filler is calcium carbonate. The total amount of filler ranges from 20 to 50% by weight, based on the total weight of the product, preferably 10 to 20% by weight of ionic filler and 10 to 20% by weight of inert filler. It is particularly advantageous to use a mixture of sodium sulfate and calcium carbonate in a weight ratio of 50:50. Both calcium carbonate and sodium sulfate are typically contained in the product in an amount of 13 to 17% by weight. In the case of means for storage in a water reservoir, the inert filler is not present to avoid the formation of residues and sediments after the means are dissolved.

In the event that the inert filler is somewhat soluble, for example in the case of calcite, it is convenient to use this filler in the form of particles with a small size range so that dissolution and re-precipitation of the calcite occurs as little as possible. A suitable material of this type is Calcitec SG (TM).

Suitable halogen-based bleaches are those that are at least partially soluble in water. Bleaching agents based on active chlorine are particularly advantageous. Active chlorine-based bleaching agents, at least partially water soluble and suitable for use in the purposes of the invention include chlorinated cyanurates, phthalimides, p-toluenesulfonamides, azodicarbamides, hydantoins, glycouracils, amines and melanins.

It is also possible to use other agents capable of releasing chlorine, such as calcium hypochlorite. Preferred agents of this type are alkali metal cyanurates.

A particularly preferred bleaching agent will contain at least one N-chlorinated derivative of cyanuric acid, preferably sodium dichlorocyanurate NaDCCA. The bleaching agent is preferably present in an amount of 10 to 25, preferably approximately 15% by weight. A suitable bleaching agent is, for example, Oxidan DCN/WSG (TM) (Sigma).

Compositions according to the invention in the form of blocks preferably contain 4 to 10% by weight of perfume and especially 5 to 8% by weight of perfume. These are preferably liquid perfumes in the form of oil, as described in EP 167 210. It is clear that the perfume used must be stable in the presence of the selected water-soluble bleaching agent based on active chlorine. Examples of suitable materials are substituted quinolines, cedryl methyl ether and cineole.

Commonly supplied perfumes in the form of oil can be easily tested by contacting them with a water-soluble bleaching agent that releases active chlorine. As an example of permanent, commonly supplied perfumes, we can mention Verdeo 898, Bonanza 048 and Ponderosa 431 (all IFF), as well as LB 132 (Quest). Particularly advantageous perfumes are Icebreaker Super Mod, Oxygen Supra Mod, Motebianco Supra, Montebianco Turbo 7 and Lemonfit Supra (TM) (Givaudan Rouře).

The preparations according to the invention may contain, in smaller quantities, other possible components, such as dyes and/or bleaches. These materials should be chosen so that they are compatible with the bleach and do not react with it to any significant extent. For example, Sudangelb 150 (TM) (Sandoz) and Colany Breen (TM) green have been found to be acceptable dyes.

9 » 9 9 1 (Hoechst) and Dispers Blue (TM) (BASF). A suitable bleach is titanium dioxide. Another possible component can be a wetting agent, promoting foaming, such as amine oxide.

The means according to the invention in the form of blocks can be produced by extrusion in a known manner. The procedure is such that the components are thoroughly mixed and the resulting material is then extruded in the form of a rod, which is divided into blocks of the required length.

The term block should not be limited in any way to the shape of the final product. For storage under the edge of the bowl, the rod is usually divided into sections whose length is considerably greater than their diameter, but for storage in the water tank, the rod is divided into much shorter sections. The rod material is preferably homogeneous and its composition is the same in all parts.

The means according to the invention in the form of a block to be placed under the edge of the bowl are usually used stored in containers which are suspended from the edge of the bowl so that during flushing the water flows through the container and part of the block dissolves. These boxes are usually fitted with a hook of a suitable size for hanging over the edge of the bowl.

In a particularly suitable composition, the agent according to the invention contains the following components:

component % wt.

primary alkyl sulfate 4 until 15 alkylbenzene sulfonate 15 until 50 at least one N-chlorinated derivative cyanuric acids such as NaDCCA 2 until 30 sodium sulfate, calcium carbonate, or a mixture 10 until 50 perfume 2 until 15 dye and/or bleach 0 until 5

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The practical implementation of the invention will be illustrated by the following examples, which, however, are not intended to limit the scope of the invention.

Examples of embodiments of the invention

The ingredients shown in Table 1 below were mixed in the proportions shown and extruded onto a bar which was then divided into blocks. All proportions and percentages are by weight. The invention is illustrated by Examples 1, 2 and 4, Example 3 is comparative. The following materials were used in the production of the means:

non-ionic wetting agent anionic wetting agent ABS

PAS bleaching agent ionic filler inert filler

Empilan KM 50/KF (TM, Albright and Wilson)

PEG 4000 Monostearate (100%, DAC)

Nansa HS 80/GPF (TM, Albright and Wilson)

Empicol LZ-V (TM, Albright and Wilson) Oxidan DCN/WSG (TM, Sigma) Sodium sulfate Calcium carbonate (Calcitec SG,

TM, Mineraria Sacilese).

Montebianco Turbo 7 perfume (TM, Givaudan Rouré) was present at 6.5 to 7%, titanium dioxide as a bleach at 0.071%, and Colanyl Green (Hoechst) dye at 0.024% or less.

The top part of the table shows the composition, the bottom part shows the height of the foam. The foam height is given in cm immediately after rinsing.

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Table 1

example 1 2 3 4 means bleaching agent 15 15 15 15 ionic filler 15 15 10.2 15.98 inert filler 7.3 14.5 4.36 14.7 perfume 6.5 6.5 6.5 6.5 dye 0.024 0.024 0.024 0.024 bleacher - - 0.07 - auxiliary means - 1.0 - nonionic wetting agent - - 3.0 - PASSPORT 10 10 - 10 ABS 35 30 47.8 30 water. up to 100 up to 100 to 10 0 up to 100 results flushing foam height 1 2.4 2.5 1.0 2.5 5 3.3 3.5 1.5 3.5 15 3.4 3.5 3.0 3.5 30 4.0 4.0 3.0 4.0 50 4.0 4.0 3.0 4.4 105 4.5 4.5 3.3 5.0 150 4.7 4.7 3.3 5.0 210 4.5 4.5 3.2 4.6 250 4.0 4.0 3.0 4.5 300 3.5 3.5 3.0 4.0 350 3.0 3.0 2.0 3.5 400 2.5 2.5 2.0 2.8 500 2.0 2.0 1.3 2.0 600 0.5 0.5 0.5 0.5

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From the results shown in Table 1, it is clear that the block compositions containing the conventional wetting agent system in Comparative Example 3 produced a significantly lower amount of foam than the compositions of Examples 1, 2 and 4, which contained PAS. During the processing of the mixture for the production of these preparations, it was also observed that the mixture is significantly less sticky for the preparations of Examples 1, 2 and 4 than for the standard preparations of Example 3.

Claims (5)

A toilet cleansing composition in the form of blocks, comprising (a) 2 to 15% by weight of liquid perfume in the form of oil, (b) 2 to 30% by weight of a halogen-based bleach, (c) 3 to 15% by weight of a primary alkyl sulphate; and d) 13 to 50% by weight of alkylbenzene sulfonate. 2. A composition according to claim 1, wherein the halogen-based bleaching agent is selected from the group of chlorinated cyanurates, phthalimides, p-toluenesulfondamides, azodicarbonamides, hydantoins, glycoluracil, amines, melamines and mixtures thereof. 3. A composition according to claim 1 comprising 4 to 15% by weight of primary alkyl sulfate, 15 to 50% by weight of alkylbenzene sulfonate, 2 to 30% by weight of at least one N-chlorinated cyanuric acid derivative, 10 to 50% by weight of sodium sulphate, calcium carbonate or a mixture thereof, 2 to 15% by weight of a perfume; and 0 to 5% by weight of colorant and / or optically brightener. «4» · fl · fl 4. A composition according to claim 3 wherein the N-chlorinated cyanuric acid derivative is sodium dichlorocyanurate. Use of 3 to 15% by weight of primary alkyl sulfate and 15 to 50% by weight of alkylbenzene sulfonate to reduce the tackiness of the composition in the manufacture of toilet cleansing compositions containing 2 to 15% by weight of liquid perfume in the form of oil and 2 to 30% by weight of bleaching agent. azi halogens.