DK159373B - CLEANING TABLE FOR SELF-EFFECTIVE CLEANING OF DENTAL SOLUTIONS AND PROCEDURES FOR ITS MANUFACTURING - Google Patents

Description

- i -

DK 159373 B

The invention relates to a purification table for self-acting cleaning of dentures with 15-25% by weight sodium bicarbonate, 8-15% by weight sodium hexametaphosphate, acid disodium pyrophosphate, more than 15% by weight of a lime-binding organic acid, 2-6% by weight of an ethylene diamine -5 tracetate, 1-4 wt% high molecular weight polyethylene glycol, at least 1 wt% of a polymeric surfactant dye carrier, more than 0.5 wt% surfactants and 0.5 - 1.5 wt% aroma mass, and a monoperoxy sulfate as oxidizing agent, and a method of making such a tablet.

From German Patent Specification 2,357,720, there is already known a purification table in which at least one of the two layers present forming the tablet has the above composition. The pH of the approx. 1% solution for each of the two layers is 6.5-7.0. As complexing agent which forms chelate-like complexes with the metal ions, ethylene diamine tetraacetate is used in the known purification stage. Citric acid is used as the lime-binding organic acid in the known purification stage.

In the purification tablet according to German publication specification 2,357,720, the sodium bicarbonate serves as a pH-stabilizing, gas-forming carrier. The sodium hexametaphosphate acts as plasticizer, while the citric acid has a reducing antimicrobial effect and further dissolves the tartar present on the denture to be cleansed. The ethylene-tetramine additive acts softening and demineral in serous as a result of chelation, thereby further observing a tartar dissolving effect. The high molecular weight polyethylene glycol used acts as an antimicrobial disintegrant. The surfactants have an emulsifying effect and degrade at the known cleaning stage the denture coating due to their surface activity. The sodium pyrophosphate acts as a reducing and emollient and, by surfactant, degrades the denture coating. The monoperoxy sulfates used, i.e. salts of the monoperoxy sulfuric acid, serve as oxidizing agents. As the polymeric dye carrier with surfactant purification effect, in the known purification stage, a commercially available sodium salt of an organic carb with several carboxylic groups (polycarboxylic acid) is preferably used, as described in German disclosure 2,357,720, which also improves the purification effect. The 35-all benzene sulphonate used as a surfactant according to German publication

DK 159373 B

- 2 - commencement letter 2 357 720, for example. sodium dodecylbenzenesulfonate, to which may also be added fatty acid disodium sulfosuccinates. The preferred molecular weight of the polyethylene glycol used may for the prior art purification constitute between ca. 4,000 and 25,000, preferably approx. 20,000.

5 All in all, according to German publication specification 2 357 720, the purification tab has proved to be good. However, for many applications, it has been found desirable to realize substantially shorter cleaning times than the 10-15 minutes required by the cleaning tab according to German publication specification 2,357,720. The two-layered structure of the known 10 cleaning table has also been found in many cases. to be comparatively unfavorable in price.

It is known that deposits of calcium compounds on dentures respectively on their metal parts and on metal parts in dental controllers are better dissolved by particularly acidic cleaners such as e.g. disclosed in CH-15 patent 480 840, whereby pH values of 1.5-5 are present, but this has the disadvantage that the chelating complexing agents used can no longer become effective because the lower pH value for such an effect of the complexes are located at approx. pH 6.

It is therefore the object of the invention to provide a purification set, consisting of only one layer, which provides a very fast, reliable purification.

According to the invention, this task is solved by the lime-binding organic acid at a purification stage of the type initially specified to obtain a total purification time of 3 - 5 minutes and a dissolution time of 25 1-2 minutes, amidosulfonic acid is formed by the free ethylene diamine tetraacetate. acid (H4EDTA) using 1.5 - 2.5% by weight of dialkylthiourea, 0.2 - 0.5% by weight of a nonionic, fluorine-containing surfactant selected from the compounds of the general formula: C8F150 (CH2CH2O) n CgF15, where n has an average value of 23, or c8f15 ° (^ 2 ^ 2 ^^ n CH3 * where n has an average value of 8 and where c8f15 is the tetramer of tetrafluoroethene, wherein a 1% solution of loss The -35 light in water gives a pH of 6.3 - 6.5.

DK 159373 B

- 3 -

A particularly preferred embodiment of the invention is that the polymeric dye carrier consists of 1 to 2% by weight of a commercially common sodium salt of an organic acid having several carboxyl groups (polycarboxylic acid), preferably sodium polyacrylate. In particular, 1-2% by weight of a cross-branched polyvinyl pyrrole in don may also be added.

Particularly good, the following composition for a purification tablet according to the invention has been found to be: 10-12% by weight sodium hexametaphosphate, 10-18-20% by weight sodium bicarbonate, 1.5-2.0% by weight polyethylene glycol having a molecular weight of 20,000, 24% by weight. 30 wt% amidosul phonic acid, 20-24 wt% monoperoxy sulfate, 5.5 - 7.5 wt% acid di sodium pyrophosphate, 2-3 wt% ethylenediaminetetraacetic acid, 1 - 2.0 wt% sodium polyacrylate with dye addition 0.5 - 1.5% by weight peppermint powder, 0.5-1.5% by weight sodium dodecylbenzenesulphonate, 0.3 - 1.0% by weight lauryl polyglycol ether sulfosuccinate, 0.2 - 0.4% by weight of a nonionic, fluorine-containing surfactant selected from the group consisting of: C8F15 ° (CH2CH2 °) n C8F15 »* where n has a 9 average cut value of 23, or 25 c8f15 ° (CH2CH2 ° Jn CH3 * where n has a cut average value of 8, and wherein CgFjg is the tetramer of tetrafluoroethene, 0.8-1.1% by weight sodium benzoate, 1.5-2.0% by weight dialkylthiourea, 1.5-2.0% by weight pol yvinyl polypyrrolidone, 0.5-1.5% by weight disodium sulfosuccinate, and 0.8-1.2% by weight all chylarylsulphonate.

The process of the invention for the preparation of a purifying tablet consists in the above-mentioned amounts of sodium hydrogen carbonate,

DK 159373 B

- 4 - umhexametaphosphate, polyethylene glycol and 30 - 50% by weight of the total amount of amidosulfonic acid are first mixed with each other and processed into a granulate, the granulate thus produced is then mixed with the other components and the purified acetate is produced from the mixture.

Particularly preferred embodiments of this method are described in the corresponding subclaims.

In contrast to the previously common purification tablets for dentures which are highly alkaline, neutral and weakly acidic (e.g., the purification tablet according to German publication specification 2,357,720), a pH range which can be precisely adjusted can be used in the purification tablet according to the invention. between 6.3 and 6.5, with a variation width of ± 0.3. The cleaning tablet according to the invention no longer requires the daily cleaning of the denture to remove the deposits that occur during the day, which consist of fever residue and saliva deposits, but provide an extremely fast, unresolved time of approx. 1 - 2 minutes a full cleaning effect for a total cleaning time of 3 - 5 minutes. It is important for the purification tablet of the invention that the amidosulfonic acid be used with the dialkyl thiourea which acts as an anticorrosive agent. Such a dialkyl thiourea, which thus serves as an inhibitor of the amidosulfonic acid to avoid any damage to the prosthetic material or metal parts, is available under the trade name LITHSOLVENT-HC® from Keller & Bohacek KG, Diisseldorf. This anticorrosive agent or inhibitor, respectively, acts synergistically with the sodium benzoate used for the tablet of the invention, the disinfectant of which is known, thereby producing a further synergistic action with the active oxygen (from the monoperoxysulfate) as the inhibitor acts as an antioxidant. . A synergistic effect also occurs between the anticorrosive agent and the amidosulfonic acid. This prevents the peroxides from being degraded by storing the cleaning tablet.

Particularly suitable as sodium hexametaphosphate is an instantiated sodium hexametaphosphate available under the name Budit 8 H®.

By using the purifying tablet of the invention powdered ethylenediaminetetraacetic acid, whose pH is 2.5-3 in a saturated aqueous solution, requires a substantially smaller amount of chelating complexers than would be the case with the known - 5 -

DK 159373 B

tablet was used ethylene diamine tetraacetate. A powdered ethylene-diamine tetraacetic acid (H4EDTA) used for the tablet of the invention is available under the trade name Versene® Acid of the US company Dow Chemical Company.

Furthermore, the combination of the surfactants used for the cleaning tablet according to the invention with the nonionic fluorochemical substance has the effect that extremely low surface tension of the cleaning fluid of 25-10 "7 - 26 · 10" 7 N / m is obtained. . At these low surface stresses, the wetting ability of the cleaning liquid increases, respectively, the emulsifying ability, which results in the short cleaning time. Preferably, as surfactants e.g. the raw materials known under the trade name Steina-pol®NKS 100 and Rewo-DERM®S 1333 are used by the company Rewo Chemische Fabrik GmbH,

Steinau. These surfactants provide a durable, greasy and rigid foam, whereby the surface tension in a 0.1% aqueous solution for NKS 100 is at about 15%. 25 · 10-7 N / m and for S 1333 at 30 - 35 · 10 “7 N / m. By adding the nonionic fluorochemical substance used for the purification tablet of the invention, obtained under the designation Monflor®51 or Monflor®52 by the company ICI, at a concentration of approx. 0.2 - 0.5% in the tablet composition, the surface tension of the cleaning liquid decreases to 20 25 · 10 "7 N / m - 26 · 10" 7 N / m. In this way the wetting and penetration of the surfactants are particularly enhanced.

With the cleaning tablet according to the invention, it is possible for the first time to provide an extremely fast cleaning agent which is effective in a cleaning liquid with a surface tension of only 25 * 10 "7 -25 26 · 10-7 N / m, while the average voltage is at 35 · 10 ~ 7 -90 · 10 “7 N / m for other detergents.

As press and auxiliary agents, similar substances can be used, which are also used in the purification tablet according to German publication specification 23 57 720. These may include sugar fatty acid esters available under the trade names Wasag®7 and Wasag®15. These products are available in Switzerland, Austria and the Eastern Bloc countries under the trade name Sucrapan. As press and lubricants, substances (available under the trade name Luviskol®V 64, Aerosil®, Tamol®, Awycel® or Waxy®Mais) may also be used, all in all suitable natural starches, sugared starches and derivatives such as starch sugar, dextrose anhydrous, polyethylene glycol and - 6 -

DK 159373 B

microcrystalline celluloses.

In the following, the purification table and method of the invention are explained by an exemplary embodiment.

5

Example;

To prepare a purification tablet according to the invention, 10.55 parts by weight of complexing and dispersing agent, which may be 10 with phosphate or phosphate-free, obtained under the trade name Budit® 8 H, 10.85 parts by weight of amidosulfonic acid (sulfamic acid), are first filled. , 00 parts by weight of sodium hydrogen carbonate and 1.81 parts by weight of polyethylene glycol with a molecular weight of 20,000 via a conventional dosing unit and a hoist in a mixing boiler. The mixing boiler is then coupled to a GLATT®-15 granulator. The components to be granulated are heated by hot air at 100 - 115 ° C, setting the air supply opening at steps 5 to 6 and the exhaust air opening at steps 2 to 3. During still stirring, the components to be granulated are heated and at 60 - 65 ° C - and this temperature should be kept for approx. 10 minutes - granulation takes place 20 then. At this temperature of 60-65 ° C, polyethylene glycol melts a total of 20,000 in the said period of approx. 10 minutes, complete granulation. At the same setting of the supply air and exhaust air apertures, the granulate is cooled under cooling air supply with a temperature of 6 - 10 ° C to approx. 25 ° C. Next, the granules are filled into air- and moisture-tight containers, e.g. in polyethylene bags, with regular tests to check that the maximum moisture content is 0.25% H2 O.

42.21 parts by weight of the granulate thus prepared are mixed as described in German publication specification 2,357,720 with the other components of the purification tablet, namely in this embodiment with 22.60 parts by weight of monoperoxy sulfate, 6.23 parts by weight of sodium pyrophosphate, 2.26 parts by weight of ethylene diamine tetraacetic acid (Versene Acid), 1.18 parts by weight of a commercially available sodium salt of a previously stated polycarboxylic acid with dye. -

DK 159373 B

Rewo Chemische Werke GmbH), 0.54 parts by weight of lauryl polyglycol ether sulfosuccinate (Rewo-DERM®S 1333 from the company Rewo Chemische Fabrik GmbH), 0.30 parts by weight of a nonionic, fluorochemical substance (Monflor®51 from the company ICI), 0.90 parts by weight of sodium benzoate, 1.81 parts by weight of dialkyl thiourea (LICHTSOLVENT-HC® from Keller & Bohacek KG, Dusseldorf), 1.81 parts by weight of polyvinyl polypyrrolidone (Plasdone®XL from GAF (Deutschland) GmbH), 1.00 parts by weight sodium sulfosuccinate (trade name Wasag®7), 1.00 parts by weight of all chylaryl sulfonate (Wasag®15) and an additional 16.27 parts by weight of amidosulfonic acid (sulfamic acid). After mixing, drying and sieving, a purification table was pressed. A 17 'aqueous solution has a pH of 6.3 - 6.5.

The features of the invention, which have been elucidated both in the foregoing description and in the following claims, can be both individually and in any combination to be essential for the realization of the invention in its various embodiments.

Claims (10)

1. The purification table for self-acting cleaning of dentures with 15-25% by weight sodium bicarbonate, 8-15% by weight sodium hexametaphosphate, acid di sodium pyrophosphate, more than 15% by weight of a lime-binding organic acid, 2-6% by weight of an ethylene diamine tetraacetate , 1-4 wt% 5 high molecular weight polyethylene glycol, at least 1 wt% of a polymeric surfactant dye carrier, more than 0.5 wt% surfactants and 0.5 - 1.5 wt% aroma mass, and a monoperoxy sulfate as oxidizing agent, characterized in that the lime-binding organic acid is amidosulfonic acid, the ethylenediaminetetraacetate is formed by the free acid 10 (H4EDTA), the use of 1.5 - 2.5 wt.% dialkylthiourea, 0.2-0.5 wt. % of a nonionic, fluorine-containing surfactant selected from the compounds of the general formula C8F150 (CH2CH20) n C8F15, where n has an average value of 23, or C8F150 (CH2CH20) n CH3, where n has an average value of 8, and where C8F15 is the tetramer of tetrafluoroethene, wherein a 1% solution of the tablet in water gives a pH of 6.3 -6.5. The purification table according to claim 1, characterized in that the polymeric dye carrier consists of 1-2% by weight sodium polyacrylate relative to the total mixture. The cleaning table according to claim 1 or 2, characterized in that it contains 1-2% by weight of a cross-branched polyvinylpyrrolidone. The purification diet according to claim 3, characterized by the following composition: 10 - 12% by weight sodium hexametaphosphate, 18-20% by weight sodium bicarbonate, 1.5-2.0% by weight polyethylene glycol having a molecular weight of 20,000, 24-30% by weight % amidosul phonic acid, 20 - 24 wt% monoperoxysulfate, 5.5 - 7.5 wt% acid di sodium pyrophosphate, 2-3 wt% ethylenediaminetetraacetic acid, 1 - 2.0 wt% sodium polyacrylate with dye Insertion, DK 159373 B - 9 - 0.5 - 1.5 wt% peppermint powder, 0.5 - 1.5 wt% sodium dodecylbenzenesulphonate, 0.3 - 1.0 wt% lauryl polyglycol ether sulfosuccinate, 0.2 - 0.4 wt% of a nonionic, fluorinated surfactant selected in the group consisting of: CgF 2 O (CH 2 CH 2 O) n CgF 2 g, where n has an average value of 23, or CqF 15Ο (CH 2 CH 2 O) n CH 3, where n has an average value of 8, and wherein CgF · is the tetramer 10 of tetrafluoroethene, 0.8-1.1% by weight sodium benzoate, 1.5-2.0% by weight dialkylthiourea, 1.5-2.0% by weight polyvin yl polypyrrolidone, 0.5-1.5% by weight disodium sulfosuccinate, and 0.8-1.2% by weight all chylaryl sulphonate. Process for the preparation of a purification table according to one of the preceding claims, characterized in that said amounts of sodium bicarbonate, sodium hexametaphosphate, polyethylene glycol and 30-50% by weight of the total amount of amidosulfonic acid are mixed and processed into a granulate so that prepared granules are then mixed with the other components, and a purification table is prepared from the mixture. Process according to claim 5, characterized in that the 25 components to be used for the granulate are filled into a granulator, heated to a temperature of 338 - 343 ° K and swirled at this temperature for approx. 10 minutes, after which the finished granules are cooled to approx. 298 ° C. Process according to claim 6, characterized in that the heating of the granular components takes place with hot air of approx. 110 - 115 ° C. Process according to claim 7, characterized in that the cooling of the granulate is carried out with cooling air of approx. 279 - 283 ° K. Process according to claims 5-8, characterized in that the present mixture is dried in a vacuum dryer, e.g. a drum or double-cone dryer, at <10.7 kPa, preferably at 6.7 - 8kPa, and at a temperature <318 ° K, preferably at 305 to 311 ° K. Process according to claim 9, characterized in that the further processing of the prepared mixture is carried out at a residual moisture of <0.57 ', preferably of <0.25%.