Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
  • C11D17/0047—Detergents in the form of bars or tablets
  • C11D17/0056—Lavatory cleansing blocks
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/66—Non-ionic compounds
  • C11D1/83—Mixtures of non-ionic with anionic compounds
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/02—Inorganic compounds ; Elemental compounds
  • C11D3/04—Water-soluble compounds
  • C11D3/046—Salts
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/02—Anionic compounds
  • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
  • C11D1/14—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aliphatic hydrocarbons or mono-alcohols
  • C11D1/146—Sulfuric acid esters
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/02—Anionic compounds
  • C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
  • C11D1/22—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aromatic compounds
• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
  • C11D1/66—Non-ionic compounds
  • C11D1/72—Ethers of polyoxyalkylene glycols
• • E—FIXED CONSTRUCTIONS
  • E03—WATER SUPPLY; SEWERAGE
  • E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
  • E03D9/00—Sanitary or other accessories for lavatories ; Devices for cleaning or disinfecting the toilet room or the toilet bowl; Devices for eliminating smells
  • E03D9/02—Devices adding a disinfecting, deodorising, or cleaning agent to the water while flushing
  • E03D2009/024—Devices adding a disinfecting, deodorising, or cleaning agent to the water while flushing using a solid substance

Definitions

• the present invention relates to toilet cleaner blocks, more particularly to toilet cleaner blocks containing fatty alcohol alkoxylate, alkylbenzene sulfonate, alkyl sulfate and filler.
• the invention also provides a process for the manufacture of the toilet cleaner block and a system comprising such toilet cleaner block and a release device.
• Toilet cleaner blocks have long been employed under the toilet rim (so-called rim blocks) as well as in water tanks (in-tank blocks or cistern blocks) for cleaning, disinfecting, and perfuming of toilets.
• the toilet block slowly releases active ingredients and disintegrates into the water.
• Rim blocks typically contain active ingredients such as surfactants, perfume, acids, bases, salts, thickeners, antimicrobials, preservatives, sequestrants, bleaching agents, corrosion inhibitors, flush regulators, enzymes, microorganisms, active substances for biofilm removal, lime-scale inhibitors, soil-adhesion inhibit etc. Rim blocks also often contain a substantial amount of filler, such as sodium sulfate or sodium carbonate.
• active ingredients such as surfactants, perfume, acids, bases, salts, thickeners, antimicrobials, preservatives, sequestrants, bleaching agents, corrosion inhibitors, flush regulators, enzymes, microorganisms, active substances for biofilm removal, lime-scale inhibitors, soil-adhesion inhibit etc.
• Rim blocks also often contain a substantial amount of filler, such as sodium sulfate or sodium carbonate.
• Colourants are commonly applied in rim blocks for esthetic reasons, but also to allow the consumer to quickly assess whether the rim block is due to be replaced.
• Solid toilet blocks are typically manufactured and shaped by an extrusion process. In case of rim blocks the shaped toilet blocks are inserted into suitable baskets for use in the toilet bowl.
• a strand of toilet cleaner composition can be produced at high speed, that the composition and appearance of the strand does not vary and that it can be cut into separate pieces (blocks) at high frequency without damaging these pieces and without product loss.
• WO 00/58433 describes lavatory cleansing blocks comprising at least two phases, one phase comprising a perfume and the second phase comprising an alcohol ethoxylate, ethoxylates with 8 or less moles of alkylene oxide.
• the patent examples describe lavatory blocks comprising 50 wt.% of a Phase A, said phase A containing 15 wt.% sodium dodecylbenzenesulfonate, 6 wt.% sodium lauryl sufate, 4.7 wt.% calcium carbonate, 3.1 wt.% sodium sulfate and 3 wt.% alcohol ethoxylate.
• WO 2010/130645 describes a spherically shaped toilet cleaner block comprising:
• the inventors have developed a shaped toilet cleaner block that meets all of the aforementioned desiderata.
• the shaped toilet cleaner block of the present invention comprises
• the shaped toilet cleaner block of the present invention offers the important advantage that it can easily and reproducibly be produced in attractive shapes by means of extrusion at very high speed.
• the extruded strand of the present toilet cleaner composition can be cut into toilet cleaner blocks at high frequency without difficulty, yielding blocks with very regular, undamaged cut surfaces.
• the shaped toilet cleaner block of the present invention further offers the advantage that it is washed away by the repeated flushing operations at a constant rate and in a very regular and uniform way.
• the toilet cleaner block provides good cleaning and disinfecting action, perfume release and foaming when the block is contacted with water during flushing of the toilet bowl throughout the its life cycle, which life cycle ends when the toilet block has been completed degraded by dissolution into the flush water.
• the invention also relates to a process of manufacturing the aforementioned toilet cleaner block, said process comprising:
• the invention further provides a toilet cleaning system comprising at least one toilet cleaner block according to the present invention and a release device that is configured for reversible positioning under the rim of a toilet bowl in the path of toilet flush water.
• a first aspect of the present invention relates to a shaped toilet cleaner block that meets all of the aforementioned desiderata.
• the shaped toilet cleaner block of the present invention comprises
• the toilet cleaner block of the present invention preferably is designed for use under the toilet rim of the toilet bowl.
• the toilet block per se typically has a weight in the range of 10-200 grams, more preferably of 20-100 grams and most preferably 40-60 grams.
• the water content of the toilet cleaner block typically is less than 10 wt.%, more preferably less than 8 wt.%, most preferably less than 6 wt.%.
• the toilet cleaner block preferably has a density of 1.2 to 1.9 g/ml, more preferably of 1.4 to 1.8 g/ml and most preferably of 1.5 to 1.7 g/ml.
• the combination of the nonionic surfactant, the C 8-18 alkyl benzene sulfonate, the C 8-18 alkyl sulfate and the filler typically constitutes at least 60 wt.%, more preferably at least 70 wt.% and most preferably at least 80 wt.% of the block.
• the toilet cleaner block of the present invention contains at least one nonionic surfactant in the form of fatty alcohol alkoxylate and at least two different anionic surfactants (C 8-18 alkyl benzene sulfonate and C 8-18 alkyl sulfate).
• the cleaner block may suitably contain further surfactants, such as cationic surfactants and amphoteric surfactants.
• the toilet cleaner block preferably contains nonionic surfactants and anionic surfactants in a weight ratio in the range of 1:15 to 1:2, more preferably in the range of 1:12 to 1:4.
• Nonionic and anionic surfactants preferably represent at least 60 wt.%, more preferably at 80 wt.% and most preferably at least 90 wt.% of the total amount of surfactant that is contained the toilet cleaner block.
• the toilet cleaner block of the present invention typically contains at least 20 wt.% surfactant, more preferably at least 25 wt.% surfactant, even more preferably at least 30 wt.% surfactant.
• the total surfactant content of the block preferably does not exceed 80 wt.%.
• nonionic surfactant that may be employed in the present toilet cleaner block besides the fatty alcohol alkoxylate include ethylene oxide/propylene oxide block polymers, fatty acid alkanolamides, fatty acid polyglycol ethers, alkyl polyglycosides, fatty acid glucamides and combinations thereof.
• the toilet cleaner block preferably contains 2-35 wt.%, more preferably 2.5-25 wt.%, even more preferably 3-15 wt.% of nonionic surfactant.
• the toilet cleaning block contains at least 1.5 wt.%, more preferably at least 2 wt.%, even more preferably at least 2.5 wt.% of fatty alcohol alkoxylate.
• the block preferably contains less than 15 wt.%, more preferably less than 12 wt.%, even more preferably less than 8 wt.% of nonionic surfactant other than the fatty alcohol alkoxylate.
• the fatty alcohol alkoxylate employed in the toilet cleaner block is preferaby selected from alkoxylated C 12-20 fatty alcohols, more preferably from alkoxylated C 16-18 fatty alcohols.
• the fatty alcohol alkoxylate in the toilet cleaner block is preferably selected from ethoxylated fatty alcohols with a degree of ethoxylation of 16 to 28, even more preferably with a degree of ethoxylation of 20 to 27.
• the fatty aclcohol aloxylate employed in the toilet cleaner block is ethoxylated C 16-18 fatty alcohol with a degree of ethxylation of 24 to 26.
• the toilet cleaner block of the present invention preferably contains 15-40 wt.%, more preferably 18-35 wt.% and most preferably 20-30 wt.% C 8-18 alkyl benzene sulfonate
• the toilet cleaner block preferably contains at least 10 wt.%, more preferably at least 15 wt.%, even more preferably at least 18 wt.% of C 10-14 alkyl benzene sulfonate.
• the alkyl benzene sulfonate employed in the toilet cleaner block preferably is a salt selected from alkali metal salts, earth alkaline metal salts, ammonium salts and combinations thereof. More preferably, the alkyl benzene sulfonate is an alkali metal salt, most preferably a sodium salt.
• the toilet cleaner block typically contains 8-30 wt.%, more preferably 10-28 wt.% and most preferably 12-20 wt.% of the alkyl sulfate.
• the block contains at least 5 wt.%, preferably at least 7 wt.% and most preferably at least 8 wt.% of C 10-14 alkyl sulfate.
• the alkyl sulfate employed in the block preferably is a salt selected from alkali metal salts, earth alkaline metal salts, ammonium salts and combinations thereof. More preferably, the alkyl sulfate is an alkali metal salt, most preferably a sodium salt.
• the filler in the toilet cleaner block is an inorganic salt selected from sulfates, carbonates, halides, phosphates and combinations thereof. Even more preferably, said inorganic salt is selected from sulfates, carbonates and combinations thereof.
• the inorganic salt that may be employed as a filler in the toilet cleaner block is preferably selected from alkali metal salts, earth alkaline metal salts, ammonium salts and combinations thereof, even more preferably it is selected from alkali metal salts, most preferably it is selected from sodium salts.
• the amount of filler in the toilet cleaner block preferably is in the range of 30-65 wt.%, more preferably 35-60.
• the toilet cleaner block of the present invention contains at least 20 wt.%, preferably at least 30 wt.%, more preferably at least 35 wt.% sodium sulfate.
• the toilet cleaner block of the present invention preferably contains a colourant.
• a colourant in the toilet cleaner block not only serves to increase the appeal of the product, but it is also makes it easier to verify how much product is left after repeated flushes.
• the toilet cleaner blocks of the present invention offer the advantage that colourant is gradually released from the block.
• the toilet cleaner block contains at least 10 mg/kg, more preferably at least 30 mg/kg and even more preferably at least 50 mg/kg of colourant.
• the toilet block of the present can suitably be provided in a variety of colours, including green, blue, red, violet, pink and yellow.
• the toilet cleaner block may suitably contain builder.
• builders that may be included in the block include low molecular weight polycarboxylic acids and salts thereof, the homopolymeric and copolymeric polycarboxylic acids and salts thereof, citric acid and salts thereof, carbonates, phosphates, silicates, zeolites and combinations thereof.
• the toilet cleaner block contains 0.5-20 wt.%, more preferably 0.8-15 wt.%, even more preferably 1-10 wt.% builder.
• he toilet cleaner block contains at least 0.8 wt.%, preferably at least 1 wt.% of builder selected from phosphate, citrate and combinations thereof.
• the toilet cleaner block of the present invention preferably contains perfume.
• the composition preferably comprises one or more fragrances in an amount of 0.01 to 10 wt %, more preferably 0.05 to 8 wt %, even more preferably 0.1 to 5 wt %.
• d-limonene, citral, linalool or combinations of these fragrance components may be utilized as the perfume component.
• ingredients that may applied in the toilet cleaner block of the present invention include bleaching agents, polymers, corrosion inhibitors, flush regulators, adhesion inhibitors, pH regulators, enzymes and preservatives,
• Bleaching agents that may suitably be applied in the toilet cleaner blocks of the present invention include peroxides, peracids and/or perborates.
• a bleach activator can also be used in addition to the bleaching agent.
• Polymers such as acrylic polymers, can suitably be incorporated in the toilet cleaner block to reduce formation of lime scale and soil redoposition.
• Flush regulators can be employed in the toilet cleaner block to regulate degradation of the block.
• Solid long-chain fatty acids such as stearic acid, are preferred regulators.
• Enzymes that may be applied in the toilet cleaner block include proteases, lipases, amylases, hydrolases and/or cellulases.
• Another aspect of the invention relates to a toilet cleaning system comprising at least one toilet cleaner block as defined herein before and a release device that is configured for reversible positioning under the rim of a toilet bowl in the path of toilet flush water.
• the release device comprises:
• Yet another aspect of the invention relates to a process of manufacturing a toilet cleaner block as defined herein before, said process comprising:
• the toilet cleaner block of the present invention can be produced at very high extrusion speeds.
• the extrusion blend is extruded at a speed of at least 3.0 m/min, more preferably at least 5.0 m/min and even more preferably 6.0-16.0 m/min
• the cutting frequency in the present process preferably exceeds 1 s -1 , more preferably it exceeds 3 s -1 and even more preferably it is in the range of 4-15 s -1 .
• the cutting frequency equals the number of blocks that are produced from the extruded strand per second.
• the extrusion blend is extruded at a temperature in the range of 20-80 °C, more preferably in the range of 30-75 °C, even more preferably in the range of 40-70 °C.
• the blocks obtained by cutting of the extruded strand may be subjected to further processing steps, such as shaping.
• the cut blocks may, for instance, be shaped in rotationally symmetric objects by shaping the cut blocks in a ball rolling machine or in a press.
• Other suitable shaping processes include casting and calendaring.
• Toilet cleaner blocks according to the present invention were manufactured by means of extrusion on the basis of the formulation shown in Table 1.
• Table 1 Concentration (wt%) Sodium sulfate 50.48 Sodium Dodecylbenzenesulfonate 24.00 Sodium Lauryl Sulfate 15.00 Ethoxylated alcohols 1 5.00 Perfume (including citral, limonene and linalool) 3.00 Pentasodium triphosphate 1.65 Lauryl Alcohol 0.25 Sodium citrate 0.60 Polymeric Blue Colourant 0.02 1 An alkylpolyethylene glycol ether made from a linear, saturated C 16 C 18 fatty alcohol having a nominal degree of ethoxylaton of 25
• the toilet cleaner blocks so obtained has a very regular shape with clean cutting surfaces.
• the properties of the blocks are listed in Table 3.
• Table 3 Shape hexagonal cylinder Dimensions (height x diameter) 20 x 22 mm Weight 11 g Density 1.6 - 1.65 g/ml Colour Blue Moisture 1.7 wt.%
• Five toilet cleaner blocks as described above were introduced in a single release device made of transparent material and comprising five baskets for holding the toilet cleaner blocks, each of said baskets containing a flush water distribution element.
• the five baskets were arranged in a row and the release device contained a flexible hook for fixating the row of baskets in a horizontal fashion underneath the toilet rim.
• Example 1 was repeated, except that this time sodium dodecyl benzenesulfonate was fully replaced by sodium C 14-16 olefin sulfate.

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Citations (4)

• 2016
  • 2016-10-10 EP EP16193066.4A patent/EP3168284A1/de not_active Ceased

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