CA1235975A - Washing agent compositions suitable for washing dishes in a washing machine - Google Patents
Washing agent compositions suitable for washing dishes in a washing machineInfo
- Publication number
- CA1235975A CA1235975A CA000458379A CA458379A CA1235975A CA 1235975 A CA1235975 A CA 1235975A CA 000458379 A CA000458379 A CA 000458379A CA 458379 A CA458379 A CA 458379A CA 1235975 A CA1235975 A CA 1235975A
- Authority
- CA
- Canada
- Prior art keywords
- derivative
- washing
- chloroisocyanurate
- agent
- coated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
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
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/395—Bleaching agents
- C11D3/3958—Bleaching agents combined with phosphates
-
- 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
- C11D17/0039—Coated compositions or coated components in the compositions, (micro)capsules
-
- 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
- C11D3/16—Organic compounds
- C11D3/37—Polymers
- C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C11D3/3749—Polyolefins; Halogenated polyolefins; Natural or synthetic rubber; Polyarylolefins or halogenated polyarylolefins
-
- 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
- C11D3/395—Bleaching agents
- C11D3/3955—Organic bleaching agents
Abstract
ABSTRACT
In a washing agent composition suitable for washing dishes in a washing machine, and which contains a softening agent chosen from the polyphosphates, an alkalinity-producing agent chosen from sodium salts containing sodium metasilicate, a nonionic surface-active agent and a coated chloroisocyanurate derivative, the chloroisocyanurate derivative is stabilised to prevent significant loss of chlorine and of the surface-active agent through mutual destruction while the composition is in storage. This stabilisation is achieved by coating the chloro-isocyanurate derivative with the aid of a polyethylene wax employed in a concentration of 0.3 to 10% by weight relative to the weight of the chloroisocyanurate derivative.
In a washing agent composition suitable for washing dishes in a washing machine, and which contains a softening agent chosen from the polyphosphates, an alkalinity-producing agent chosen from sodium salts containing sodium metasilicate, a nonionic surface-active agent and a coated chloroisocyanurate derivative, the chloroisocyanurate derivative is stabilised to prevent significant loss of chlorine and of the surface-active agent through mutual destruction while the composition is in storage. This stabilisation is achieved by coating the chloro-isocyanurate derivative with the aid of a polyethylene wax employed in a concentration of 0.3 to 10% by weight relative to the weight of the chloroisocyanurate derivative.
Description
NE~ ~ASHING AGENT ~MPOSITIONS SUITABLE FOR ~AS~ING
.
DISHES IN A ~AS~ING MACHIN~
The present ;nvent;on relates to ne~ washiny agent compositions su;table for ~ashiny dishes in a ~ashing machine, and a process for prepar;ng them.
The ~ashing of dishes in a machine invoLves both the detergent action of the ~ash;ng agent and the mechani-cal action of water. Apart from ;ts deter~ent action~ -the washing agent must also have a disinfectant capacity and water-softening propert;es. The ~ashing agent must therefore possess strong detergence but also ;ts composi-tion must be such that ;t does not cause the formation of foams ~hich are harmful to the mechanical action of water.
This is ~hy the ~ashing agent compositions cons;st ;n a kno~n manner of: -- a softening agent, generally chosen from the class of polyphosphates. Among the polyphosphates used, mention can be made of sodium tripolyphosphate, sodium hexametaphosphate and sodium pyrophosphate, as ~ell as the correspondin~ potassium polyphosphates;
2û - an alkalinity-producing agent consisting of a sodium salt containing a sodium metasilicate in its anhydrous form or in its pentahydrate form. In a kno~n manner sodium silicate may be partly replace~ by sodium carbonate, sodium sulphate, or sodium hydroxide;
- a non-foaming surface-active agent of the non-ionic type, chosen from the following classes of products:
ethoxylated ~inear alcohols, condensate of ethylene oxide
.
DISHES IN A ~AS~ING MACHIN~
The present ;nvent;on relates to ne~ washiny agent compositions su;table for ~ashiny dishes in a ~ashing machine, and a process for prepar;ng them.
The ~ashing of dishes in a machine invoLves both the detergent action of the ~ash;ng agent and the mechani-cal action of water. Apart from ;ts deter~ent action~ -the washing agent must also have a disinfectant capacity and water-softening propert;es. The ~ashing agent must therefore possess strong detergence but also ;ts composi-tion must be such that ;t does not cause the formation of foams ~hich are harmful to the mechanical action of water.
This is ~hy the ~ashing agent compositions cons;st ;n a kno~n manner of: -- a softening agent, generally chosen from the class of polyphosphates. Among the polyphosphates used, mention can be made of sodium tripolyphosphate, sodium hexametaphosphate and sodium pyrophosphate, as ~ell as the correspondin~ potassium polyphosphates;
2û - an alkalinity-producing agent consisting of a sodium salt containing a sodium metasilicate in its anhydrous form or in its pentahydrate form. In a kno~n manner sodium silicate may be partly replace~ by sodium carbonate, sodium sulphate, or sodium hydroxide;
- a non-foaming surface-active agent of the non-ionic type, chosen from the following classes of products:
ethoxylated ~inear alcohols, condensate of ethylene oxide
2 -with propylere oxide, alkoxy amines, polyethoxyethers of fatty alcGhols, ethoxylated alkylphenols, or phosphoric esters of fatty alcohols. Preferably, for reasons of effectiveness, biodegradability and cost, a surface-artive agent is chosen from the class of ethoxylated l;near alco-hols; and - a disin,ectant.
It is known to use as disinfectant a solid chlorine-based product which releases active chlsrine.
This is most frequently a sodium or potassium salt of dichloroisocyanuric acid or trichlorocyanuric acid.
It is possible to use anhydrous sodium dichloroiso-cyanurate titrating at 63X of active chlorine, a sodium dichloroisocyanurate dihydrate titrating at 56X of active chlorine, anhydrous potassium dichloroisocyanurate titrating at 59X of active chlorine, potassiu~ dichloro-isocyanurate monohydrate titrating at 56X of active chlor-ine, calcium dichloroisocyanurate tetrahydrate titra-ting at 56X of active chlorine or trichloroisocyanuric acid 2û titrating at 91X of active chlorine.
The active chlorine is defined as being the oxidis-ing capacity due to the pos;tive chlorine~ To understand better to ~hat positive chlorine corresponds it should be recalled that chlorine present in the chlorinated deri-vatives described above is bound to a nitrogen atom andis present therein in the oxidation state + 1, that is to say Cl+.
During the oxidation-reduction process a Cl+
ion combines ~ith t~o electrons to be converted into the ~Z35~5 ~l (chloride) state. T~o equiv3lents of an oxid;sing agent are released, ~hich correspond to 71 9 of elementary chlorine although the atomic weight is only 35.5. This also means that an atom of ~l+ has the same oxidising capacity as a molecule of elementary chlorine.
The aim is to employ chlorinated disinfectants of the isochlorocyanurate family hav;ng the highest poss-ible content of active chlorine. The most advantageous chlorinated disinfectant would therefore be trichloroiso-cyanuric acid which titrates at approximately 91X of activechlorine. Unfortunately, the higher the active chlorine content of the ;sochlorocyanurate derivative, the more reactivity the derivative exhibits towards surface-active agents. ~ashing agents containing an isochlorocyanurate derivative are therefore unstable in storage because they lose sign;ficant quantities both of chlorine and of surface-active agent through mutual destruction. This instability is particularly pronounced in the case of trichloroisocyanuric acid.
2û A means of stabilising isochlorocyanuric deriva-tives has now been found, which makes it possible to manu-facture washing agent compositions ~hich are stable in storage and suitable for uashing dishes in a ~ashing machine, even ~ith trichloroisocyanuric acid.
The present invention relates to a ne~ washing asent composition suitable for ~ashing dishes in a washing machine, containing a softening agent chosen from the polyphosphates, an alkalinity-producing agent chosen from the sodium salts containing sodium metasilicate, a nonionic ~Z35~75i surface-active agent and a chloroisocyanurate derivative, in which the chloroisocyanurate derivative is coated with a polyethylenewax used in a concentra-tion of 0.3 to 10% by weight relative to the weight of the acid.
Tt has been found that polyethylene waxes were compatible with the isochlorocyanurate derivatives. More-over, when used in relatively small amounts, they make it possible to produce good stabilisation. Furthermore, they are dispersible in aqueous media at a temperature f 50 to 65C.
The polyethylene waxes consist of polyethylenes with an average molecular weight of approximately 2,500, a low melting point below 70C, a dropping point of 70 to 80 C and a density of 0.86 to 0.88. They are employed in a concentration of 0.3 to 10% by weight relative to the isochlorocyanurate derivative, preferably in a concentration of 3 to 5% by weight. Above 5%
difficulties appear in carrying out the coating and it is necessary to modify the coating conditions.
The use of quantities greater than 10% does not produce an appreciable improvement in the storage stability of the washing agent compositions; the use of quantities below 0.3% results in insignificant stabilisation.
The washing agent compositions which are th~
subject of the invention are manufactured by first carrying out the coating of the isochlorocyanurate derivative with polyethylene waxes. This coating is carried out in any kind of industrial mixer, such as a drum mixer.
~359~
A mixer fitted ~ith a hea~ing device is preferably used.
It is also possible to employ a rotary mixer of the con-crete-mixer type in which the molten wax is sprayed on the isochlorocyanurate derivative heated to a temperature in the region of 50C. The temperature of use perm;ts good distribution of the polyethylene waxes, which solidify on cooling. The wax-coated isochlorocyanurate der;vat;ve ;s then mixed in another mixer w;th the other components of the wash;ng agent.
The quantities of the various components employed for the manufacture of the new wash;ng agent compositions which are the subject of the invent;on are employed ;n convent;onal weight rat;os. The softening agent chosen from the polyphosphates is employed in a concentration of 25 to 6D% by weight and preferably 40 to 50~ by ~eight relative to the ~eight of the composition.
The alkalinity-producing agent chosen from the sodium sil;cates is employed in a concentration of 30 to 70X by weight and preferably 40 to 60Z by weight relative to the weight of the composition. In a kno~n manner, sodium silicate may be partly replaced with sodium car-bonate, sodium sulphate or sodium hydroxide. The nonionic surface-active agent is employed in a concentrat;on of 0.5 to 4X by weight and preferably in a concentration of 1 to 3X by ~eight relative to the ~eight of the composi-tion. The isochlorocyanurate derivative coated with the aid of polyethylene waxes is employed in a concentration of 0.5 to 5X by weight and preferably 1 to 3X by ~eight relative to the weight of the compos;tion.
~235~75 The following examples ;llustrate the present invention.
Trichloroisocyanuric acid is first stab;lised ~;th the aid of polyethylene ~axes in the folLo~in~ manr,er:
The acid is heated to a temperature of 50C
and is then placed in a rotary mixer. While the mixer rotates, polyethylene ~axes are sprayed from above by means of a spray-gun. The temperature of use permits 1û a good distribution of the waxes, which solidify on cool-ing. 7he polyethylene ~axes employed have a melt;ng po;nt belo~ 70C, a dropp;n~ po;nt from 70 to 80C and a dens;ty of 0.86 to 0.88. Various mixtures of acid and waxes are produced by us;n~ varyin~ percentages of poly-ethylene waxes. The m;xtures obta;ned ;n this uay are employed for the manufacture of washing agent compos;tions.
Washing agents hav;ng the follow;ng compos;t;on are prepared tparts are expressed ;n parts by ~e;~ht~:
- sodium tr;polyphosphate: 50 parts, - sod;um metas;l;cate (anhydrous or 5H20 hydrate):
50 parts, - PLURAFAC RA 43 (ethoxylated nonionic surface-active agent manufactured by the company PCUK): Z parts, - tr;chloroisocyanuric acid coated ~;th polyethy-lene ~axes: 2 parts.
A prem;x of sod;um tripoLyphosphate ~;th nonion;c sur-face-act;ve agent ;s f;rst made in a m;xer of a rotary type.
A homogeneous m;xture ;s obta;ned after 20 m;nutes. The metas;licate is then added to the mixer and after 20 m;n-~r~4~ ~a~
~3~17~j utes the coated trichloroisocyanuric acid is added. The whole composition is then left in the roSating mixer for 20 minutes. The percentage of chlorine determined by iodometry in the washing agent composition is then 1.65X.
The washing agent composition prepared in this way is placed in plastic bags closed with a non-hermetic closure. The bags are stored in a controlled environment oven under the following conditions:
- temperature: 42C, - relative humidity: 85X.
Samples are withdrawn after a storage period of between 2 and 3 months and the residual chlorine is deter-mined by iodometry.
Table 1 shows the results obtained after 80 days' 15 storage for washing agent compositions prepared either from anhydrous sodium metasilicate or from sodium metasili-cate pentahydrate and from tr;chloroisocyanuric acid coated with the aid of polyethylene waxes employed in various percentages (by weight). The results relating to the 20 remaining chlorine are expressed as percentages relative to the original chlorine.
~2~597S
TRICHLOROISO-Washing agent com- Wash;ng agent com-CYANURIC ACIDposition containing position containing anhydrous sodium sodium metasilicate S metasilicate pentahydrate X of remaining X of rema;nin~
chlorine chlorine Not coated with polyethylene 10 waxes 10 10 Coated with 0~3X
of polyethylene waxes 23 22 Coated with 0.6X
of polyethylene ~axes 25 22.5 Coated w;th 1.4X
of polyethylene ~axes 56 24 Example 1 is repeated us;ng trichloroisocyanuric acid coated ~ith various quant;ties of polyethylene waxes and the determination of remaining chlorine is carr;ed out after 70 days' storage. Table 2 collates thP results obtained.
~23~75 _ 9 _ TA~LE 2 Tr;chloroiso-~ashing agent com- ~ash;n~ a~ent com-cyanuric acidposition containing position containing anhydrous sodium sodium metasilicate metasilicate pentahydrate X of remaining % of remaining chlorine chlorine Not coated with polyethylene 10 waxes 40 2D
Coated w;th 2~
of polyethylene waxes 54 37 Coated with 3%
of polyethylene waxes 60 37.5 Coated with ;X
of polyethylene waxes 75 39 Anhydrous sodium isochlorocyanurate (bCCA Na) and sodium isochlorocyanurate dihydrate tDCCNa.2H20) were prepared under the same conditions as those given in Example 1 for trichlorocyanuric acid. The coat;ng ~as carried out with the aid of 5X of polyethylene ~ax.
The washing agent was prepared as in Example 1 but with sodium metasilicate pentahydrate.
Samples were withdr3wn after various storage periods.
lZ~5Y~S
Figure 1 sho~s the percentage of chlorine rema;ning as a function of the storage period in the case of DCCNa.2H2û, and Figure 2 the percentage of remain;ng chLorine in the case of anhydrous DCC Na.
It is known to use as disinfectant a solid chlorine-based product which releases active chlsrine.
This is most frequently a sodium or potassium salt of dichloroisocyanuric acid or trichlorocyanuric acid.
It is possible to use anhydrous sodium dichloroiso-cyanurate titrating at 63X of active chlorine, a sodium dichloroisocyanurate dihydrate titrating at 56X of active chlorine, anhydrous potassium dichloroisocyanurate titrating at 59X of active chlorine, potassiu~ dichloro-isocyanurate monohydrate titrating at 56X of active chlor-ine, calcium dichloroisocyanurate tetrahydrate titra-ting at 56X of active chlorine or trichloroisocyanuric acid 2û titrating at 91X of active chlorine.
The active chlorine is defined as being the oxidis-ing capacity due to the pos;tive chlorine~ To understand better to ~hat positive chlorine corresponds it should be recalled that chlorine present in the chlorinated deri-vatives described above is bound to a nitrogen atom andis present therein in the oxidation state + 1, that is to say Cl+.
During the oxidation-reduction process a Cl+
ion combines ~ith t~o electrons to be converted into the ~Z35~5 ~l (chloride) state. T~o equiv3lents of an oxid;sing agent are released, ~hich correspond to 71 9 of elementary chlorine although the atomic weight is only 35.5. This also means that an atom of ~l+ has the same oxidising capacity as a molecule of elementary chlorine.
The aim is to employ chlorinated disinfectants of the isochlorocyanurate family hav;ng the highest poss-ible content of active chlorine. The most advantageous chlorinated disinfectant would therefore be trichloroiso-cyanuric acid which titrates at approximately 91X of activechlorine. Unfortunately, the higher the active chlorine content of the ;sochlorocyanurate derivative, the more reactivity the derivative exhibits towards surface-active agents. ~ashing agents containing an isochlorocyanurate derivative are therefore unstable in storage because they lose sign;ficant quantities both of chlorine and of surface-active agent through mutual destruction. This instability is particularly pronounced in the case of trichloroisocyanuric acid.
2û A means of stabilising isochlorocyanuric deriva-tives has now been found, which makes it possible to manu-facture washing agent compositions ~hich are stable in storage and suitable for uashing dishes in a ~ashing machine, even ~ith trichloroisocyanuric acid.
The present invention relates to a ne~ washing asent composition suitable for ~ashing dishes in a washing machine, containing a softening agent chosen from the polyphosphates, an alkalinity-producing agent chosen from the sodium salts containing sodium metasilicate, a nonionic ~Z35~75i surface-active agent and a chloroisocyanurate derivative, in which the chloroisocyanurate derivative is coated with a polyethylenewax used in a concentra-tion of 0.3 to 10% by weight relative to the weight of the acid.
Tt has been found that polyethylene waxes were compatible with the isochlorocyanurate derivatives. More-over, when used in relatively small amounts, they make it possible to produce good stabilisation. Furthermore, they are dispersible in aqueous media at a temperature f 50 to 65C.
The polyethylene waxes consist of polyethylenes with an average molecular weight of approximately 2,500, a low melting point below 70C, a dropping point of 70 to 80 C and a density of 0.86 to 0.88. They are employed in a concentration of 0.3 to 10% by weight relative to the isochlorocyanurate derivative, preferably in a concentration of 3 to 5% by weight. Above 5%
difficulties appear in carrying out the coating and it is necessary to modify the coating conditions.
The use of quantities greater than 10% does not produce an appreciable improvement in the storage stability of the washing agent compositions; the use of quantities below 0.3% results in insignificant stabilisation.
The washing agent compositions which are th~
subject of the invention are manufactured by first carrying out the coating of the isochlorocyanurate derivative with polyethylene waxes. This coating is carried out in any kind of industrial mixer, such as a drum mixer.
~359~
A mixer fitted ~ith a hea~ing device is preferably used.
It is also possible to employ a rotary mixer of the con-crete-mixer type in which the molten wax is sprayed on the isochlorocyanurate derivative heated to a temperature in the region of 50C. The temperature of use perm;ts good distribution of the polyethylene waxes, which solidify on cooling. The wax-coated isochlorocyanurate der;vat;ve ;s then mixed in another mixer w;th the other components of the wash;ng agent.
The quantities of the various components employed for the manufacture of the new wash;ng agent compositions which are the subject of the invent;on are employed ;n convent;onal weight rat;os. The softening agent chosen from the polyphosphates is employed in a concentration of 25 to 6D% by weight and preferably 40 to 50~ by ~eight relative to the ~eight of the composition.
The alkalinity-producing agent chosen from the sodium sil;cates is employed in a concentration of 30 to 70X by weight and preferably 40 to 60Z by weight relative to the weight of the composition. In a kno~n manner, sodium silicate may be partly replaced with sodium car-bonate, sodium sulphate or sodium hydroxide. The nonionic surface-active agent is employed in a concentrat;on of 0.5 to 4X by weight and preferably in a concentration of 1 to 3X by ~eight relative to the ~eight of the composi-tion. The isochlorocyanurate derivative coated with the aid of polyethylene waxes is employed in a concentration of 0.5 to 5X by weight and preferably 1 to 3X by ~eight relative to the weight of the compos;tion.
~235~75 The following examples ;llustrate the present invention.
Trichloroisocyanuric acid is first stab;lised ~;th the aid of polyethylene ~axes in the folLo~in~ manr,er:
The acid is heated to a temperature of 50C
and is then placed in a rotary mixer. While the mixer rotates, polyethylene ~axes are sprayed from above by means of a spray-gun. The temperature of use permits 1û a good distribution of the waxes, which solidify on cool-ing. 7he polyethylene ~axes employed have a melt;ng po;nt belo~ 70C, a dropp;n~ po;nt from 70 to 80C and a dens;ty of 0.86 to 0.88. Various mixtures of acid and waxes are produced by us;n~ varyin~ percentages of poly-ethylene waxes. The m;xtures obta;ned ;n this uay are employed for the manufacture of washing agent compos;tions.
Washing agents hav;ng the follow;ng compos;t;on are prepared tparts are expressed ;n parts by ~e;~ht~:
- sodium tr;polyphosphate: 50 parts, - sod;um metas;l;cate (anhydrous or 5H20 hydrate):
50 parts, - PLURAFAC RA 43 (ethoxylated nonionic surface-active agent manufactured by the company PCUK): Z parts, - tr;chloroisocyanuric acid coated ~;th polyethy-lene ~axes: 2 parts.
A prem;x of sod;um tripoLyphosphate ~;th nonion;c sur-face-act;ve agent ;s f;rst made in a m;xer of a rotary type.
A homogeneous m;xture ;s obta;ned after 20 m;nutes. The metas;licate is then added to the mixer and after 20 m;n-~r~4~ ~a~
~3~17~j utes the coated trichloroisocyanuric acid is added. The whole composition is then left in the roSating mixer for 20 minutes. The percentage of chlorine determined by iodometry in the washing agent composition is then 1.65X.
The washing agent composition prepared in this way is placed in plastic bags closed with a non-hermetic closure. The bags are stored in a controlled environment oven under the following conditions:
- temperature: 42C, - relative humidity: 85X.
Samples are withdrawn after a storage period of between 2 and 3 months and the residual chlorine is deter-mined by iodometry.
Table 1 shows the results obtained after 80 days' 15 storage for washing agent compositions prepared either from anhydrous sodium metasilicate or from sodium metasili-cate pentahydrate and from tr;chloroisocyanuric acid coated with the aid of polyethylene waxes employed in various percentages (by weight). The results relating to the 20 remaining chlorine are expressed as percentages relative to the original chlorine.
~2~597S
TRICHLOROISO-Washing agent com- Wash;ng agent com-CYANURIC ACIDposition containing position containing anhydrous sodium sodium metasilicate S metasilicate pentahydrate X of remaining X of rema;nin~
chlorine chlorine Not coated with polyethylene 10 waxes 10 10 Coated with 0~3X
of polyethylene waxes 23 22 Coated with 0.6X
of polyethylene ~axes 25 22.5 Coated w;th 1.4X
of polyethylene ~axes 56 24 Example 1 is repeated us;ng trichloroisocyanuric acid coated ~ith various quant;ties of polyethylene waxes and the determination of remaining chlorine is carr;ed out after 70 days' storage. Table 2 collates thP results obtained.
~23~75 _ 9 _ TA~LE 2 Tr;chloroiso-~ashing agent com- ~ash;n~ a~ent com-cyanuric acidposition containing position containing anhydrous sodium sodium metasilicate metasilicate pentahydrate X of remaining % of remaining chlorine chlorine Not coated with polyethylene 10 waxes 40 2D
Coated w;th 2~
of polyethylene waxes 54 37 Coated with 3%
of polyethylene waxes 60 37.5 Coated with ;X
of polyethylene waxes 75 39 Anhydrous sodium isochlorocyanurate (bCCA Na) and sodium isochlorocyanurate dihydrate tDCCNa.2H20) were prepared under the same conditions as those given in Example 1 for trichlorocyanuric acid. The coat;ng ~as carried out with the aid of 5X of polyethylene ~ax.
The washing agent was prepared as in Example 1 but with sodium metasilicate pentahydrate.
Samples were withdr3wn after various storage periods.
lZ~5Y~S
Figure 1 sho~s the percentage of chlorine rema;ning as a function of the storage period in the case of DCCNa.2H2û, and Figure 2 the percentage of remain;ng chLorine in the case of anhydrous DCC Na.
Claims (4)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. New washing agent composition suitable for washing dishes in a washing machine, containing a softening agent chosen from the polyphosphates, an alkalinity-producing agent chosen from sodium salts containing sodium metasili-cate, a nonionic surface-active agent and a coated chloro-isocyanurate derivative, in which the chloroisocyanurate derivative is coated with a polyethylene wax employed in a concentration of 0.3 to 10% by weight relative to the weight of the chloroisocyanurate derivative.
2. New composition according to Claim 1, in which the chloroisocyanurate derivative is coated with a poly-ethylene wax in a concentration of 3 to 5% by weight.
3. Process for preparing new washing agent composi-tions suitable for washing dishes in a washing machine, in which the chloroisocyanurate derivative is first coated with poly-ethylene wax used in a concentration of 0.3 to 10% by weight relative to the weight of the chloroisocyanurate derivative, and that the chloroisocyanurate derivative is then mixed with the other components of the washing agent.
4. Process for the preparation of new washing agent compositions according to Claim 3, in which the molten wax is sprayed on the isochlorocyanurate derivative heated at 50°C.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8311426A FR2548683B1 (en) | 1983-07-08 | 1983-07-08 | NEW LAUNDRY COMPOSITIONS SUITABLE FOR WASHING DISHWASHER IN A WASHING MACHINE |
| FR8311426 | 1983-07-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1235975A true CA1235975A (en) | 1988-05-03 |
Family
ID=9290658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000458379A Expired CA1235975A (en) | 1983-07-08 | 1984-07-06 | Washing agent compositions suitable for washing dishes in a washing machine |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0132184B1 (en) |
| JP (1) | JPS6036598A (en) |
| AT (1) | ATE24015T1 (en) |
| BR (1) | BR8403372A (en) |
| CA (1) | CA1235975A (en) |
| DE (1) | DE3461546D1 (en) |
| DK (1) | DK161204C (en) |
| FR (1) | FR2548683B1 (en) |
| NO (1) | NO842756L (en) |
| ZA (1) | ZA845038B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4762637A (en) * | 1986-11-14 | 1988-08-09 | Lever Brothers Company | Encapsulated bleach particles for machine dishwashing compositions |
| US4919841A (en) * | 1988-06-06 | 1990-04-24 | Lever Brothers Company | Wax encapsulated actives and emulsion process for their production |
| US5258132A (en) * | 1989-11-15 | 1993-11-02 | Lever Brothers Company, Division Of Conopco, Inc. | Wax-encapsulated particles |
| US5200236A (en) * | 1989-11-15 | 1993-04-06 | Lever Brothers Company, Division Of Conopco, Inc. | Method for wax encapsulating particles |
| US5834414A (en) * | 1996-10-17 | 1998-11-10 | Ecolab Inc. | Detergent composition having improved chlorine stability characteristics, novel chlorine containing product format and method of making chlorine stable composition |
| WO2013093877A2 (en) | 2011-12-23 | 2013-06-27 | Koninklijke Philips Electronics N.V. | Encapsulation system for controlled release of a bleaching agent |
| WO2013128328A2 (en) | 2012-02-28 | 2013-09-06 | Koninklijke Philips N.V. | System and method for whitening teeth |
| WO2014097053A1 (en) | 2012-12-18 | 2014-06-26 | Koninklijke Philips N.V. | Enhanced tooth whitening method combining sustained release varnish with light activation |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3108078A (en) * | 1958-04-14 | 1963-10-22 | Colgate Palmolive Co | Stabilized trichlorocyanuric acid and compositions containing same |
| US3703470A (en) * | 1970-10-06 | 1972-11-21 | Chemed Corp | Storage stable detergent composition |
| US4078099A (en) * | 1976-08-25 | 1978-03-07 | Lever Brothers Company | Encapsulated bleaches and methods for their preparation |
| EP0054094B1 (en) * | 1980-12-11 | 1985-07-24 | Eka Ab | Detergent compositions stable to chlorine separation, and agents for producing same |
-
1983
- 1983-07-08 FR FR8311426A patent/FR2548683B1/en not_active Expired
-
1984
- 1984-06-28 DE DE8484401373T patent/DE3461546D1/en not_active Expired
- 1984-06-28 AT AT84401373T patent/ATE24015T1/en not_active IP Right Cessation
- 1984-06-28 EP EP84401373A patent/EP0132184B1/en not_active Expired
- 1984-07-02 ZA ZA845038A patent/ZA845038B/en unknown
- 1984-07-06 DK DK335484A patent/DK161204C/en not_active IP Right Cessation
- 1984-07-06 BR BR8403372A patent/BR8403372A/en not_active IP Right Cessation
- 1984-07-06 JP JP59139203A patent/JPS6036598A/en active Pending
- 1984-07-06 NO NO842756A patent/NO842756L/en unknown
- 1984-07-06 CA CA000458379A patent/CA1235975A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2548683B1 (en) | 1986-02-21 |
| DK335484A (en) | 1985-01-09 |
| ZA845038B (en) | 1985-03-27 |
| EP0132184A1 (en) | 1985-01-23 |
| DK161204C (en) | 1991-11-25 |
| ATE24015T1 (en) | 1986-12-15 |
| NO842756L (en) | 1985-01-09 |
| DK161204B (en) | 1991-06-10 |
| FR2548683A1 (en) | 1985-01-11 |
| DK335484D0 (en) | 1984-07-06 |
| DE3461546D1 (en) | 1987-01-15 |
| JPS6036598A (en) | 1985-02-25 |
| EP0132184B1 (en) | 1986-12-03 |
| BR8403372A (en) | 1985-06-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |