CA1091532A - Compositions containing foam control substance - Google Patents
Compositions containing foam control substanceInfo
- Publication number
- CA1091532A CA1091532A CA279,933A CA279933A CA1091532A CA 1091532 A CA1091532 A CA 1091532A CA 279933 A CA279933 A CA 279933A CA 1091532 A CA1091532 A CA 1091532A
- Authority
- CA
- Canada
- Prior art keywords
- sodium
- organopolysiloxane
- water
- parts
- foam control
- 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
- C11D3/02—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
- 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
- C11D3/0005—Other compounding ingredients characterised by their effect
- C11D3/0026—Low foaming or foam regulating compositions
-
- 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
- C11D3/06—Phosphates, including polyphosphates
-
- 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
- C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C11D3/373—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicones
-
- 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
- C11D3/39—Organic or inorganic per-compounds
- C11D3/3942—Inorganic per-compounds
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Detergent Compositions (AREA)
- Degasification And Air Bubble Elimination (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A powdered or granular detergent composition of reduced foaming tendency, particularly when employed in automatic washing machines. The composition contains a foam control substance consisting of sodium tripolyphosphate sodium sulphate or sodium perforate having on its surface an organopolysiloxane antifoam agent which is at least partially enclosed within a mixture of a water-insoluble wax and a water-insoluble emulsifying agent.
A powdered or granular detergent composition of reduced foaming tendency, particularly when employed in automatic washing machines. The composition contains a foam control substance consisting of sodium tripolyphosphate sodium sulphate or sodium perforate having on its surface an organopolysiloxane antifoam agent which is at least partially enclosed within a mixture of a water-insoluble wax and a water-insoluble emulsifying agent.
Description
5;~
This invention relates to detergen-t compositions containing a silicone foam contro]ling agent.
The use of solid detergent compositions in the laundering of soiled ~abrics is now well-known and ~idely practised. Compositions of this type can however give rise to excessive foaming during the wash cycle, particularly when employed in automatic washing machines. Such excessive foaming is ob~ectionable in that it interferes with the efficient laundering of the fabrics and causes overflowing and flooding ~- 10 of the machine.
One method of overcoming this problem is proposed in U.K. Patent No. 1,378,874 which relates to a foam control substance comprising powdered or granular sodium tripoly-phosphate having on its surface an organopolysiloxane anti-foam. Such foam control substances can be incorporated into powdered or granular detergent compositions and are effective in reducing or suppressing the foaming of aqueous wash liquors in which the detergent is employed. It has, however, been ~- found that such foam control substances lose some of their effectiveness when incorporated into certain detergent com-positions, especially those with a high anionic surfactant content, which are subsequently stored for prolonged periods.
We have now found that the loss of effectiveness of foam control substances of the type described can be reduced if the silicone antifoam is at least partially enclosed within a mixture of ~ water-insoluble wax and a water-insoluble emulsifying agent. Accordingly the present invention provides a powdered or granular detergent composition containing from 0.5 to 20~ by weight of a foam control substance which .
, , 3~ 3Z
comprises powclered or granular sodium tripol~phosphate, sodium sulphate or sodium perborate having on the surface thereof an organopolysiloxane antifoam agent which is ak least partially enclosed within a mixture of a water-insoluble wax having a melting point in the range from above 55C to ~-~ below 100C and a water-insoluble emulsifying agent.
` Thus, in accordance with the present teachings, a powdered or granular detergent composition is provided which contains from 0.5 to 20% of a foam control substance con~
sisting essentially of (A) a powdered or granular compound selected from sodium tripolyphosphate, sodium sulphate and sodium perborate having on the surface thereof (B) an organo-polysiloxane antifoam agent which is at least partially enclosed within a mixture of (C~ a water-insoluble wax which . has a melting point within the range from above 55C to below 100C and (D) a water insoluble emulsifying agent, there is up to 120 parts (B) per 100 parts (A), a weight ratio of (C) + (D) to (B) of from 1.5/1 to 10/1 and a weight ratio of (C) to (D) of from 0.5/1 to 5/1. : Any organopolysiloxane antifoam agent which is .` effective in controlling foaming in aqueous media may be employed to prepare the foam control substance used in the compositions of this invention. A variety of such antifoam -~ agents are known and are described for example in U.K. Patent .. Specifications Nos. 689,306 r 859,329, 1,020,022, 1,n51,687, 1,051,688, 1,079,832 and 1,110,207. They are normally either viscous paste-like materials or aqueous emulslons. Generally the antifoam agent comprises a polydlorganosiloxane in ad-mixture w~th from 1 to 10 per cent of its weight of a finely-divi`.ded filler ~avi~ng a high ~at least S0 s~uare metres per gram) surface area to weight rat~o, e.g. a fume or f~
~1 . , " ;,, ., ' . '~ ',,, :
'~ , ' '' "'~ : ' ~
precipitated silica or fume aluminium oxide. The poly-diorganosiloxane component usually has a viscosity at 25C in the range from 50 to 5000 cS. However, poly-diorganosiloxanes having viscosity outside this range can be used.
The si]icon-bonded substituents in the organopoly-siloxane are usually methyl radicals. The organopolysiloxane may, however, also contain other organic radicals, for example, alkyl, alkenyl, aryl, aralkyl and alkaryl radicals such as ethyl, propyl, octyl, tetradecyl, phenyl, benzyl and 2-phenylpropyl, or aminoalkyl radicals as described in U.K. Patent Specification No. 1,050,996. When radicals other than methyl .,.
~'~
, ~ -3a-la~.s3~
~- are present they preferably comprise less than about 50 per cent of the total silicon-bonded radicals in the organopoly-siloxane.
The polydiorganosiloxanes employed in the antifoam may or may not be end-stopped. Thus they may be terminated for example with hydroxyl radicals or end-stopped with tri-organosiloxy radicals e.g. trimethylsiloxy, phenyldimethyl-siloxy or dimethylvinylsiloxy radicals.
Preferred for use in this invention are antifoams based on or containing polydimethylsiloxanes and a high (at least 50 m2/g.) surface area silica. Among the preferred antifoam compositions are those comprising a mixture of from 80 to 98 per cent by weight of polydimethylsiloxane and from
This invention relates to detergen-t compositions containing a silicone foam contro]ling agent.
The use of solid detergent compositions in the laundering of soiled ~abrics is now well-known and ~idely practised. Compositions of this type can however give rise to excessive foaming during the wash cycle, particularly when employed in automatic washing machines. Such excessive foaming is ob~ectionable in that it interferes with the efficient laundering of the fabrics and causes overflowing and flooding ~- 10 of the machine.
One method of overcoming this problem is proposed in U.K. Patent No. 1,378,874 which relates to a foam control substance comprising powdered or granular sodium tripoly-phosphate having on its surface an organopolysiloxane anti-foam. Such foam control substances can be incorporated into powdered or granular detergent compositions and are effective in reducing or suppressing the foaming of aqueous wash liquors in which the detergent is employed. It has, however, been ~- found that such foam control substances lose some of their effectiveness when incorporated into certain detergent com-positions, especially those with a high anionic surfactant content, which are subsequently stored for prolonged periods.
We have now found that the loss of effectiveness of foam control substances of the type described can be reduced if the silicone antifoam is at least partially enclosed within a mixture of ~ water-insoluble wax and a water-insoluble emulsifying agent. Accordingly the present invention provides a powdered or granular detergent composition containing from 0.5 to 20~ by weight of a foam control substance which .
, , 3~ 3Z
comprises powclered or granular sodium tripol~phosphate, sodium sulphate or sodium perborate having on the surface thereof an organopolysiloxane antifoam agent which is ak least partially enclosed within a mixture of a water-insoluble wax having a melting point in the range from above 55C to ~-~ below 100C and a water-insoluble emulsifying agent.
` Thus, in accordance with the present teachings, a powdered or granular detergent composition is provided which contains from 0.5 to 20% of a foam control substance con~
sisting essentially of (A) a powdered or granular compound selected from sodium tripolyphosphate, sodium sulphate and sodium perborate having on the surface thereof (B) an organo-polysiloxane antifoam agent which is at least partially enclosed within a mixture of (C~ a water-insoluble wax which . has a melting point within the range from above 55C to below 100C and (D) a water insoluble emulsifying agent, there is up to 120 parts (B) per 100 parts (A), a weight ratio of (C) + (D) to (B) of from 1.5/1 to 10/1 and a weight ratio of (C) to (D) of from 0.5/1 to 5/1. : Any organopolysiloxane antifoam agent which is .` effective in controlling foaming in aqueous media may be employed to prepare the foam control substance used in the compositions of this invention. A variety of such antifoam -~ agents are known and are described for example in U.K. Patent .. Specifications Nos. 689,306 r 859,329, 1,020,022, 1,n51,687, 1,051,688, 1,079,832 and 1,110,207. They are normally either viscous paste-like materials or aqueous emulslons. Generally the antifoam agent comprises a polydlorganosiloxane in ad-mixture w~th from 1 to 10 per cent of its weight of a finely-divi`.ded filler ~avi~ng a high ~at least S0 s~uare metres per gram) surface area to weight rat~o, e.g. a fume or f~
~1 . , " ;,, ., ' . '~ ',,, :
'~ , ' '' "'~ : ' ~
precipitated silica or fume aluminium oxide. The poly-diorganosiloxane component usually has a viscosity at 25C in the range from 50 to 5000 cS. However, poly-diorganosiloxanes having viscosity outside this range can be used.
The si]icon-bonded substituents in the organopoly-siloxane are usually methyl radicals. The organopolysiloxane may, however, also contain other organic radicals, for example, alkyl, alkenyl, aryl, aralkyl and alkaryl radicals such as ethyl, propyl, octyl, tetradecyl, phenyl, benzyl and 2-phenylpropyl, or aminoalkyl radicals as described in U.K. Patent Specification No. 1,050,996. When radicals other than methyl .,.
~'~
, ~ -3a-la~.s3~
~- are present they preferably comprise less than about 50 per cent of the total silicon-bonded radicals in the organopoly-siloxane.
The polydiorganosiloxanes employed in the antifoam may or may not be end-stopped. Thus they may be terminated for example with hydroxyl radicals or end-stopped with tri-organosiloxy radicals e.g. trimethylsiloxy, phenyldimethyl-siloxy or dimethylvinylsiloxy radicals.
Preferred for use in this invention are antifoams based on or containing polydimethylsiloxanes and a high (at least 50 m2/g.) surface area silica. Among the preferred antifoam compositions are those comprising a mixture of from 80 to 98 per cent by weight of polydimethylsiloxane and from
- 2 to 20 per cent by weight of a silica having a surface area - of at least 50 m2/g. Also included in the group of preferred -antifoams are those comprising a silica, a polydimethylsiloxane and a polydiorganosiloxane which contains silicon-bonded methyl, ethyl and 2-phenylpropyl radicals, the silica being present in a proportion of from 1 to 10 per cent by weight - 20 based on the total weight of polydiorganosiloxane.
In addition to the organopolysiloxane component the :
silicone antifoam may contain other ingredients, for example, resin copolymers of (CH3)3SiOo 5 and SiO2 units as described in U.K. Patent Specification No. 1,110,207.
:
As the water-insoluble wax there may be employed for example, polyethylene wax, Montan wax, oxidised microcrystal-line wax, carnauba wax, ceresin wax and ozokerite. The wax should have a melting point of above 55C but below 100C.
` As the water-insoluble emulsifying agent there may be employed, for example, the esters of fatty acids and polyhydric _ ~ _ .
~i3Z
alcohols, e.g. sorbi-tan monooleate, sorbitan monostearate, ethylene glycol monostearate, glycerol monostearate and polyoxyethylene distearate, and the reaction products of alcohols or phenols, particularly the fatty alcohols, with ethylene oxide, e.g. polyoxyethylene nonylphenyl ether, polyoxyethylene oleyl ether, polyoxyethylene lauryl ether and tallow alcohol ethoxylates, said ethers or ethoxylates containing low proportions of ethoxy groups, usually from about 2 to 5 such groups, per molecule. In general, non-ionic emulsifiers with an HLB value below 8 are preferred.
In the foam control substances present in thecompositions of this invention the organopolysiloxane ` antifoam agent is at least partially enclosed in a mixture of the water-insoluble wax and the water-insoluble emulsify-ing agent. Such an arrangement may be arrived at by mixing the organopolysiloxane antifoam agent and the sodium tri-polyphosphate, sodium sulphate or sodium perborate so that the antifoam agent becomes dispersed over the surface of the solid. The treated solid is then contacted with the mixture of water-insoluble wax and emulsifying agent whereby it - becomes at least partially encapsulated by said mixture. Any suitable technique may be employed for treating the solid substrate with the organopolysiloxane antifoam agent. For - example the antifoam agent, in the form of a thick paste, may be mixed with the substrate using e.g. a ribbon blender -` to yield a substantially dry and flowable granulate.
Alternatively the antifoam agent may be employed in the form of an aqueous emulsion to treat the dehydrated or partially dehydrated substrate. For example dehydrated sodium tripoly-phospha~e may ~e contacted with sufflcient antifoam emulsion .
-to supply up to six molecules of H2O per molecule of sodium tripolyphosphate.
An alternative method of preparing the foam control substance comprises mixing the organopolysiloxane antifoam agent with the wax and emulsifying agent and applying the mixture to the surface of the solid substrate, e.g. the sodium tripolyphosphate. Such application may be carried out by simple mixing of the solid substrate with the other components at an elevated temperature so that the wax and emulsifying agent are molten. The resulting mixture may then be allowed to cool and thereafter crushed. The substrate can also be coated with the molten mixture of organopolysiloxane, wax and emulsifier by containing the powder in a fluidized bed and spray drying the melt onto the fluidized powder mass.
The proportion of organopolysiloxane antifoam agent present in the foam control substance is not narrowly critical and will depend on several factors, including the defoaming effect desired in the detergent composition and the method employed to prepare the foam control substance. Depending on the particular substrate up to about 120 parts of antifoam agent per 100 parts of substrate can be applied to provide a free flowing powder which is then subsequently coated with the mixture of wax and emulsifying agent. When the organo-polysiloxane antifoam agent is mixed with the wax and .. i emulsifying agent prior to application to the substrate the proportion of antifoam agent in relation to the other components of the foam control substance can also be varied within wide limits. In general it is preferred that the total amount of . . .
wax and emulsifying agent be at least equal to the amount .. . . ,, ~
'.i32 of organopolysiloxane antifoam agent. Preferably the ratio of the total weight of wax and emulsifying agent to the weight of organopolysiloxane antifoam agent is from 1.5/1 to 10/1. The proportion of wax to emulsifying agent can be varied within Eairly wide limits but preferably falls within the range from 0.5/1 to 5/1.
The hereinabove described foam control substances are incorporated into powdered or granular detergent compositions in a proportion of from 0.5 to 20~ by weight, based on total composition weight, to provide the compositions of -this invention. Powdered or granular detergent compositions are well-known and typically contain by weight from 10 to 25 per cent of an organic surface active agent, and about 15 to 50 per cent of an inorganic phosphate e.g. sodium tripolyphosphate.
:: .
Other ingredients which are normally present include one or more of sodium sulphate, sodium silicate, sodium perborate, foam builders, optical brighteners and perfumes. Typical of the organic surface active agents which are present are sodium salts of alkylaryl su~phonates, sulphates of straight chain primary alcohols, sodium alkyl glyceryl ether sulphonates and sodium and potassium salts of fatty acid mixtures. Specific examples of such organic surface active agents are sodium dodecyl benzene sulphonate, sodium lauryl sulphate and potassium stearate.
The invention is illustrated by the following examples, in which the parts are expressed by weight.
Example 1 .
Two compositions were prepared. Composition A was obtained by mixing for 3 hours at 175C a silica (3 parts) having a viscosity at 25C of about 1500 cS, a methyl to . :.
~ - 7 -::~
,
In addition to the organopolysiloxane component the :
silicone antifoam may contain other ingredients, for example, resin copolymers of (CH3)3SiOo 5 and SiO2 units as described in U.K. Patent Specification No. 1,110,207.
:
As the water-insoluble wax there may be employed for example, polyethylene wax, Montan wax, oxidised microcrystal-line wax, carnauba wax, ceresin wax and ozokerite. The wax should have a melting point of above 55C but below 100C.
` As the water-insoluble emulsifying agent there may be employed, for example, the esters of fatty acids and polyhydric _ ~ _ .
~i3Z
alcohols, e.g. sorbi-tan monooleate, sorbitan monostearate, ethylene glycol monostearate, glycerol monostearate and polyoxyethylene distearate, and the reaction products of alcohols or phenols, particularly the fatty alcohols, with ethylene oxide, e.g. polyoxyethylene nonylphenyl ether, polyoxyethylene oleyl ether, polyoxyethylene lauryl ether and tallow alcohol ethoxylates, said ethers or ethoxylates containing low proportions of ethoxy groups, usually from about 2 to 5 such groups, per molecule. In general, non-ionic emulsifiers with an HLB value below 8 are preferred.
In the foam control substances present in thecompositions of this invention the organopolysiloxane ` antifoam agent is at least partially enclosed in a mixture of the water-insoluble wax and the water-insoluble emulsify-ing agent. Such an arrangement may be arrived at by mixing the organopolysiloxane antifoam agent and the sodium tri-polyphosphate, sodium sulphate or sodium perborate so that the antifoam agent becomes dispersed over the surface of the solid. The treated solid is then contacted with the mixture of water-insoluble wax and emulsifying agent whereby it - becomes at least partially encapsulated by said mixture. Any suitable technique may be employed for treating the solid substrate with the organopolysiloxane antifoam agent. For - example the antifoam agent, in the form of a thick paste, may be mixed with the substrate using e.g. a ribbon blender -` to yield a substantially dry and flowable granulate.
Alternatively the antifoam agent may be employed in the form of an aqueous emulsion to treat the dehydrated or partially dehydrated substrate. For example dehydrated sodium tripoly-phospha~e may ~e contacted with sufflcient antifoam emulsion .
-to supply up to six molecules of H2O per molecule of sodium tripolyphosphate.
An alternative method of preparing the foam control substance comprises mixing the organopolysiloxane antifoam agent with the wax and emulsifying agent and applying the mixture to the surface of the solid substrate, e.g. the sodium tripolyphosphate. Such application may be carried out by simple mixing of the solid substrate with the other components at an elevated temperature so that the wax and emulsifying agent are molten. The resulting mixture may then be allowed to cool and thereafter crushed. The substrate can also be coated with the molten mixture of organopolysiloxane, wax and emulsifier by containing the powder in a fluidized bed and spray drying the melt onto the fluidized powder mass.
The proportion of organopolysiloxane antifoam agent present in the foam control substance is not narrowly critical and will depend on several factors, including the defoaming effect desired in the detergent composition and the method employed to prepare the foam control substance. Depending on the particular substrate up to about 120 parts of antifoam agent per 100 parts of substrate can be applied to provide a free flowing powder which is then subsequently coated with the mixture of wax and emulsifying agent. When the organo-polysiloxane antifoam agent is mixed with the wax and .. i emulsifying agent prior to application to the substrate the proportion of antifoam agent in relation to the other components of the foam control substance can also be varied within wide limits. In general it is preferred that the total amount of . . .
wax and emulsifying agent be at least equal to the amount .. . . ,, ~
'.i32 of organopolysiloxane antifoam agent. Preferably the ratio of the total weight of wax and emulsifying agent to the weight of organopolysiloxane antifoam agent is from 1.5/1 to 10/1. The proportion of wax to emulsifying agent can be varied within Eairly wide limits but preferably falls within the range from 0.5/1 to 5/1.
The hereinabove described foam control substances are incorporated into powdered or granular detergent compositions in a proportion of from 0.5 to 20~ by weight, based on total composition weight, to provide the compositions of -this invention. Powdered or granular detergent compositions are well-known and typically contain by weight from 10 to 25 per cent of an organic surface active agent, and about 15 to 50 per cent of an inorganic phosphate e.g. sodium tripolyphosphate.
:: .
Other ingredients which are normally present include one or more of sodium sulphate, sodium silicate, sodium perborate, foam builders, optical brighteners and perfumes. Typical of the organic surface active agents which are present are sodium salts of alkylaryl su~phonates, sulphates of straight chain primary alcohols, sodium alkyl glyceryl ether sulphonates and sodium and potassium salts of fatty acid mixtures. Specific examples of such organic surface active agents are sodium dodecyl benzene sulphonate, sodium lauryl sulphate and potassium stearate.
The invention is illustrated by the following examples, in which the parts are expressed by weight.
Example 1 .
Two compositions were prepared. Composition A was obtained by mixing for 3 hours at 175C a silica (3 parts) having a viscosity at 25C of about 1500 cS, a methyl to . :.
~ - 7 -::~
,
3~ :
silicon ratio of 1:1, an ethyl to silicon ratio of ahout 0.8:1 and a 2-phenylpropyl to sil:icon ratio of about 0.2:1.
Composition s was obtained by mixing a trimethylsiloxy-terminated polydimethylsiloxane (88 parts) having a viscosity at 25C of 1000 cS, a silica aerogel (10 parts) and a resin copolymer of (CH3)3SiOo 5 and SiO units (2 parts) in which the ratio of the former to the latter units was in the range from 0.6:1 to 102:1.
An organopolysiloxane antifoam agent was prepared by ~ 10 mixing together 50 parts of each of Composition A and Com-position B. The paste-like product (10 parts) was then mixed with Brij 72 (a stearyl alcohol ethoxylate) (12 parts) and oxidised Montan wax (11.4 parts) at about 80 C. This mixture was tumble mixed while molten with granular sodium tripoly-phosphate (66.6 parts) and the mix allowed to cool to yield ` a granular foam control substance which was free-flowing at room temperature.
10.5 parts of the foam control substance prepared as described above were thoroughly mixed into 98 parts of a heavy duty, granular detergent sold under the trade designation Omo.
The mi~ was stored in a cardboard container under laboratory conditions of temperature and humidity for 4 weeks. In order to evaluate the sudsing properties of the detergent composition portions (108.5 g.) of the composition were taken prior to, during and at the end of the four week storage period. Each portion was evaluated by addition to 28 litres of cold water, hardness 50 ppm Ca++, in a Philips Autostar automatic washing machine calibrated with a O - 17 cm. foam height scale. The ; maximum foam height achieved during the washing cycle was noted, , ' .
.. . . . . .
-. .
- ~
~V~ 3Z
the wash load consisting of 2 kg. of clean cotton. The results obtained are shown in the following table.
- ., Storage Period O 1 week 3 weeks 4 weeks ._ .. _. _ Maximum Foam Height 13 ~ 10 1o Example 2 ~ The procedure described in Example 1 was repeated - except that the foam control substance was prepared from 6.7 parts of the mixture of Compositions A and B, 15 parts of Brij 72, 11.6 parts of oxidized Montan wax and 66.6 parts of sodium tripolyphosphate. This foam control substance was employed in a proportion of 15.75 parts per 98 parts of Omo.
The foam heights obtained initially and after storage for 2 and 4 weeks were 9, 10 and 15 cm. respectively.
;:
_ g _ . . , ~ , .
.
silicon ratio of 1:1, an ethyl to silicon ratio of ahout 0.8:1 and a 2-phenylpropyl to sil:icon ratio of about 0.2:1.
Composition s was obtained by mixing a trimethylsiloxy-terminated polydimethylsiloxane (88 parts) having a viscosity at 25C of 1000 cS, a silica aerogel (10 parts) and a resin copolymer of (CH3)3SiOo 5 and SiO units (2 parts) in which the ratio of the former to the latter units was in the range from 0.6:1 to 102:1.
An organopolysiloxane antifoam agent was prepared by ~ 10 mixing together 50 parts of each of Composition A and Com-position B. The paste-like product (10 parts) was then mixed with Brij 72 (a stearyl alcohol ethoxylate) (12 parts) and oxidised Montan wax (11.4 parts) at about 80 C. This mixture was tumble mixed while molten with granular sodium tripoly-phosphate (66.6 parts) and the mix allowed to cool to yield ` a granular foam control substance which was free-flowing at room temperature.
10.5 parts of the foam control substance prepared as described above were thoroughly mixed into 98 parts of a heavy duty, granular detergent sold under the trade designation Omo.
The mi~ was stored in a cardboard container under laboratory conditions of temperature and humidity for 4 weeks. In order to evaluate the sudsing properties of the detergent composition portions (108.5 g.) of the composition were taken prior to, during and at the end of the four week storage period. Each portion was evaluated by addition to 28 litres of cold water, hardness 50 ppm Ca++, in a Philips Autostar automatic washing machine calibrated with a O - 17 cm. foam height scale. The ; maximum foam height achieved during the washing cycle was noted, , ' .
.. . . . . .
-. .
- ~
~V~ 3Z
the wash load consisting of 2 kg. of clean cotton. The results obtained are shown in the following table.
- ., Storage Period O 1 week 3 weeks 4 weeks ._ .. _. _ Maximum Foam Height 13 ~ 10 1o Example 2 ~ The procedure described in Example 1 was repeated - except that the foam control substance was prepared from 6.7 parts of the mixture of Compositions A and B, 15 parts of Brij 72, 11.6 parts of oxidized Montan wax and 66.6 parts of sodium tripolyphosphate. This foam control substance was employed in a proportion of 15.75 parts per 98 parts of Omo.
The foam heights obtained initially and after storage for 2 and 4 weeks were 9, 10 and 15 cm. respectively.
;:
_ g _ . . , ~ , .
.
Claims (4)
1. A powedered or granular detergent composition containing from 0.5 to 20% of a foam control substance consisting essentially of (A) a powdered or granular compound selected from sodium tripolyphosphate, sodium sulphate and sodium perborate having on the surface thereof (B) an organopolysiloxane antifoam agent which is at least partially enclosed within a mixture of (C) a water-insoluble wax having a melting point within the range from above 55°C to below 100°C and (D) a water insoluble emulsifying agent, there being up to 120 parts (B) per 100 parts (A), a weight ratio of (C) + (D) to (B) of from 1.5/1 to 10/1 and a weight ratio of (C) to (D) of from 0.5/1 to 5/1.
2. A composition as claimed in Claim 1 wherein the organopolysiloxane antifoam agent comprises a mixture of a polydimethylsiloxane, a polydiorganosiloxane in which the organic substituents are methyl radicals, ethyl radicals and 2-phenylpropyl radicals and a finely-divided silica, the silica being present in amount of 1 to 10 percent based on the total weight of the organopolysiloxane.
3. A composition as claimed in Claim 2 wherein the organopolysiloxane antifoam agent also comprises a resin copolymer of (CH3)3SiO0.5 and SiO2 units.
4. A composition as claimed in Claim 1 wherein the water-insoluble emulsifying agent is a non-ionic emulsifying agent having an HLB valve below 8.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB24448/76 | 1976-06-12 | ||
| GB2444876A GB1523957A (en) | 1976-06-12 | 1976-06-12 | Compositions containing foam control substance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1091532A true CA1091532A (en) | 1980-12-16 |
Family
ID=10211864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA279,933A Expired CA1091532A (en) | 1976-06-12 | 1977-06-06 | Compositions containing foam control substance |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA1091532A (en) |
| FR (1) | FR2354381A1 (en) |
| GB (1) | GB1523957A (en) |
| IT (1) | IT1107726B (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0008830A1 (en) * | 1978-09-09 | 1980-03-19 | THE PROCTER & GAMBLE COMPANY | Suds-suppressing compositions and detergents containing them |
| US4363740A (en) * | 1980-07-29 | 1982-12-14 | Lever Brothers Company | Process for making controlled sudsing detergent powder |
| GB8518872D0 (en) * | 1985-07-25 | 1985-08-29 | Dow Corning Ltd | Detergent foam control agents |
| GB8518871D0 (en) * | 1985-07-25 | 1985-08-29 | Dow Corning Ltd | Detergent foam control agents |
| GB8521956D0 (en) * | 1985-09-04 | 1985-10-09 | Unilever Plc | Antifoam ingredient |
| FR2655658B1 (en) * | 1989-12-08 | 1994-11-18 | Rhone Poulenc Chimie | LAUNDRY COMPOUND BASED ON A POLYPHOSPHATE AND IN PARTICULAR AN OPTICALLY ACTIVE AGENT, ITS PREPARATION METHOD AND ITS USE IN DETERGENCE. |
| GB9315671D0 (en) * | 1993-07-29 | 1993-09-15 | Dow Corning Sa | Foam control agents and their use |
| GB9426236D0 (en) * | 1994-12-24 | 1995-02-22 | Dow Corning Sa | Particulate foam control agents and their use |
| DE19817964A1 (en) * | 1998-04-22 | 1999-10-28 | Henkel Kgaa | Production of encapsulated solid particles (especially nonionic surfactants) for use in detergents for hard surfaces or for machine or manual washing-up or dishwashing liquids |
| DE60039559D1 (en) | 1999-08-13 | 2008-09-04 | Dow Corning Sa | Silicone-containing foam control agent |
| ATE286422T1 (en) | 1999-08-13 | 2005-01-15 | Dow Corning Sa | SILICONE-BASED FOAM REGULATOR |
| GB0219073D0 (en) | 2002-08-16 | 2002-09-25 | Dow Corning | Silicone foam control compositions |
| GB0219089D0 (en) * | 2002-08-16 | 2002-09-25 | Dow Corning | Silicone foam control compositions |
| GB0625046D0 (en) | 2006-12-15 | 2007-01-24 | Dow Corning | Granular materials for textile treatment |
| RU2013118020A (en) | 2010-12-10 | 2015-01-20 | Дау Корнинг Корпорейшн | GRANULAR COMPOSITION FOR FOAM CONTROL |
| RU2706319C1 (en) * | 2019-01-30 | 2019-11-15 | Акционерное общество "Государственный Ордена Трудового Красного Знамени научно-исследовательский институт химии и технологии элементоорганических соединений" (АО "ГНИИХТЭОС") | Silicone antifoaming agent for laundry detergents |
| CN109939468A (en) * | 2019-04-18 | 2019-06-28 | 南京广全环保技术服务有限公司 | Petroleum defoaming agent |
-
1976
- 1976-06-12 GB GB2444876A patent/GB1523957A/en not_active Expired
-
1977
- 1977-05-30 IT IT2413377A patent/IT1107726B/en active
- 1977-06-06 CA CA279,933A patent/CA1091532A/en not_active Expired
- 1977-06-13 FR FR7718017A patent/FR2354381A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| IT1107726B (en) | 1985-11-25 |
| FR2354381B1 (en) | 1979-03-09 |
| GB1523957A (en) | 1978-09-06 |
| FR2354381A1 (en) | 1978-01-06 |
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| MKEX | Expiry |