JP3100246B2 - Foam inhibitor composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foam inhibitor composition, and more particularly to a foam inhibitor composition which exhibits excellent dispersion stability and foam suppressing properties when added to an aqueous cutting oil, an oil agent for a dyeing process and the like. Things.

[0002]

2. Description of the Related Art Since silicone-based antifoaming agents containing dimethylpolysiloxane as a main component have various excellent properties as compared with other antifoaming agents, various types of general chemical industry which involve foaming are used. Widely used in the process. However, since this dimethylpolysiloxane is inherently hydrophobic, it has been used as an emulsion-type defoaming agent in which it is dispersed in water using a surfactant in practical terms. When the liquid to be treated is at a high temperature or is subject to high shear, the emulsion is destroyed, so that the desired defoaming effect cannot be expected, and sometimes foaming is accelerated. They also have the disadvantage that they cannot be used in non-aqueous systems and that the emulsion separates during prolonged storage.

For this reason, it has been proposed to use an organopolysiloxane modified with a polyoxyalkylene group for this defoaming agent (US Pat. No. 3,233,986).
This has the disadvantage that the foam breaking and defoaming effects are small. A hydrophilic polysiloxane represented by polyoxyalkylene-modified dimethylpolysiloxane is used as a base oil, and dimethylpolysiloxane and fine powder are used. It has also been proposed to improve the defoaming effect by using an oil compound made of silica in combination (Japanese Patent Publication No. 52-198).
No. 36, Japanese Patent Publication No. 52-22638, Japanese Patent Publication No. 55-23084), and those using a long chain alkyl group and a polyoxyalkylene co-modified organopolysiloxane as a base oil have been proposed (Japanese Patent Publication No. It is difficult to stably disperse this in dimethylpolysiloxane only with finely divided silica, and it is difficult to disperse it under high temperature or mechanically strong shearing force for a long time, There is a disadvantage that silica aggregates and separates during storage.

[0004]

Therefore, in order to improve the dispersibility of dimethylpolysiloxane and silica,
It has also been proposed to treat the silica surface with a silazane treatment to make it hydrophobic, but in this case, the defoaming property may be reduced depending on the treatment amount, so that there is a disadvantage that it is difficult to control this. The antifoaming agent is a polyoxyalkylene-modified organopolysiloxane limited by the present inventors, a foam inhibitor component composed of dimethyl silicone oil and fine powdered silica, and a polyoxyethylene-polyoxypropylene copolymer. And a foam inhibitor comprising dimethyl silicone oil in which both ends of a molecular chain are blocked with a hydroxyl group (see Japanese Patent Application No. 2-414678). Although you can do,
This still has the disadvantage that the dispersibility and defoaming properties of the silica are insufficient.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a foam inhibitor which solves such disadvantages, which comprises A) a compound represented by the general formula:

Embedded image [Where G ¹ is a group selected from R ¹ , G ² or G ³ , G ² , G ³
Formula having a molecular weight of _{500 ~3,000 (CH 2) r -O} (R 2 O) s Q (R 2 is an ethylene group and a propylene group, Q is a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, an acetyl group, isocyanic A monovalent organic group selected from acid groups, r is 2 to 6, and s is 5 to 50)
In the group represented by, G ² is an ethyleneoxy group in the (R ² O) group.
10-30 mol%, G ³ is an ethylene group in (R ² O) groups 65
Is of 85 mol%, G ² / G ³ (molar ratio) is 0.3 / 1 to 3 /
1, R ¹ is a monovalent hydrocarbon group having 3 to 20 carbon atoms, a is 0 or 1, m and n are positive numbers of 1 to 30, p is 10 to 100, and q is 1
30 to 80% by weight of a polyoxyalkylene-modified silicone oil represented by the following formula:
75 to 95 parts by weight of dimethylpolysiloxane having an average particle size of 1 to 100 mμ, a specific surface area of 300 m ² / g or more, and a trimethylsilyl group density of 0.5 to 10 μmol /
m ² , alkoxy group density 0.5 to 10 μmol / m ² , silano-
Le group density is 0.5 ～5Myu mol / m ² of the trimethylsilylated treated porous silica particles are dispersed in an organic solvent organosilica sol by porous silica particles 1-10
5% to 50% by weight of organosilica sol and 4 to 15% by weight of finely divided silica, C) having a molecular weight range of 500 to 3,000 and 10 to 85% by mole of ethyleneoxy groups. 5) 50% by weight of a polyoxyethylene-polyoxypropylene copolymer, D) both ends of which are blocked with monohydroxydimethylsilyl groups.
2 to 20% by weight of a linear dimethylpolysiloxane having a viscosity at 5 ° C. of 10 to 500 cS.

That is, the present inventors have conducted various studies on a method for solving the disadvantages of a conventionally known polyoxyalkylene-modified organopolysiloxane as a main component, and as a result, this polyoxyalkylene-modified organopolysiloxane has been described And the molar ratio of ethyleneoxy and propyleneoxy groups contained in the mixture and the amount of ethyleneoxy groups and the mixture of dimethylpolysiloxane, organosilica sol and fine powder silica When the thus obtained polyoxyethylene-polyoxypropylene copolymer and the linear dimethylpolysiloxane having a molecular chain terminal blocked with a monohydroxydimethylsilyl group are added, the foam inhibitor thus obtained has dilution stability, Excellent foam stability and high temperature stability It was heading.

In addition, when a polysiloxane containing two kinds of polyoxyalkylenes in the same molecule is used, as described above, in particular, compared to a polysiloxane modified with a single polyoxyalkylene, the polysiloxane is excellent in consumption. Shows foam continuity and foam breaking properties.Emulsion is not destroyed even under high temperature and high shear. No oil spots or aggregates are generated. After confirming that there is no such problem, the present inventors have completed the present invention by conducting research on the types and mixing ratios of the respective components described above. This is described in more detail below.

[0008]

The present invention relates to a foam inhibitor composition which is particularly useful in the dyeing industry and the like because of its excellent dilution stability, antifoaming stability and high-temperature stability. A) a polyoxyalkylene-modified silicone oil represented by the above general formula (1), B) a blend comprising dimethylpolysiloxane, an organosilica sol treated with trimethylsilylation and finely divided silica, C) a polyoxyethylene-poly It is obtained by mixing a predetermined amount of oxypropylene copolymer and D) dimethyl silicone having hydroxyl group at molecular chain end.

The polyoxyalkylene-modified silicone oil as component A) constituting the suds suppressor composition of the present invention has the general formula

Embedded image Where G ¹ is selected from R ¹ , G ² or G ³
G ² and G ³ are represented by the formula (CH ₂ ) _r -O (R ² O) _s -Q, R ² is an ethylene group and a propylene group, r is 2 to 6, preferably 2 to 3,
s is from 5 to 50, preferably from 15 to 45, but G ²
Is 10 to 30 mol% of ethyleneoxy groups in the (OR ² ) group, and G ³ is
Ethyleneoxy groups in (R ² O) groups is required be of 65 to 85 mol%.

If the average molecular weight of G ² and G ³ is less than 500, the effect of the alkyleneoxy group as a hydrophilic group cannot be sufficiently exhibited. If the average molecular weight exceeds 3,000, the viscosity becomes too high and the dispersibility becomes too high.
Since the workability is deteriorated, it is necessary to be in the range of 500 to 3,000, preferably 1,000 to 2,000. Also this
G ² / G ³ in formula (molar ratio) the dispersibility is deteriorated becomes many hydrophobic moiety is less than 0.3 for G ^2, G ^3, because the defoaming property is deteriorated when it exceeds 3, 0.3 ~ It is necessary to be in the range of 3.

In the above, Q is selected from a hydrogen atom or an alkyl group having 1 to 8 carbon atoms such as a methyl group, an ethyl group, a propyl group, a butyl group, a hexyl group, an octyl group, an acetyl group, an isocyanic acid group and the like. The monovalent organic group R ¹ is a monovalent hydrocarbon group, but if the number of carbon atoms exceeds 20, the defoaming property and water dispersibility deteriorate, so that the number of carbon atoms is 3 to 20.
When m and n are positive numbers of 1 to 30, m + n is a number of 3 to 40, preferably 3 to 20, and when p is less than 10, the defoaming property becomes poor, and the viscosity is low. The storage stability becomes poor due to the decrease, and if it exceeds 100, the viscosity at the time of dilution becomes high and the workability deteriorates.
6060, and q is a positive number of 1１〜10, which is based on the content of the hydrophobic portion represented by siloxane in the molecule, that is, G ² , G ³ Is preferably 5 to 30% by weight excluding the molecular weight.

This polyoxyalkylene-modified silicone oil can be synthesized by a conventionally known method. For example, it is possible to use two types of methylpolysiloxane containing a ≡SiH group and having a vinyl group or an allyl group at the molecular chain terminal. The above polyoxyalkylene compound and an unsaturated olefin having 3 to 20 carbon atoms are subjected to an addition reaction in the presence of a platinum catalyst, or a vinyl group or a vinyl group is added to an organopolysiloxane containing a SiH group and an R ¹ group at the molecular chain end. It can be easily obtained by an addition reaction of two or more kinds of polyoxyalkylene compounds having an allyl group or the like.
If the amount of the component A) in the 00% by weight is less than 30% by weight, water dispersibility is poor, and if it is more than 80% by weight, it is difficult to obtain a uniform and stable self-emulsifying emulsion.
It may be in the range of 80% by weight, more preferably 50 to 70% by weight.

Next, the foam inhibitor composition of the present invention is constituted.
The compound as the component (B) is a main component for imparting antifoaming persistence to the foam inhibitor composition of the present invention, and is composed of dimethylpolysiloxane and trimethylsilylation-treated organosilica sol and fine powder. It is made of silica.

The dimethylpolysiloxane used here may be either linear or branched, but is preferably one having a molecular chain terminal blocked with a trimethylsilyl group. This dimethylpolysiloxane is preferably as low in viscosity as possible from the viewpoint of easy dispersibility and workability, and the higher the viscosity, the better from the viewpoint of defoaming continuity.
If the viscosity is less than 10 cS, the resulting composition has poor stability.If the viscosity is greater than 100,000 cS, the viscosity increases when the resulting composition is diluted with water before use as a foam inhibitor composition, resulting in significant work. 10-10
It is good to be in the range of 0,000 cS, preferably 100 to 5,000 cS.

The organosilica sol used here can be produced by treating a silica sol produced from alkoxysilane as a raw material with, for example, trimethylsilanol, which has an average particle size of 1%. When the average particle diameter is less than 1 μm, it is difficult to produce the same. When the average particle diameter is more than 100 μm, it is difficult to stably disperse in an organic solvent, and it is difficult to obtain a uniform foam inhibitor composition due to precipitation. ~ 100mμ, preferably 5-50mμ,
Further, when the specific surface area is less than 300 m ² / g, the dispersion stability in an organic solvent is low, the silica particles are liable to settle, and the specific surface area is 300 m ² / g or more because a uniform foam inhibitor cannot be obtained. Is dispersed in an organic solvent. This porous silica is obtained in a substantially spherical form from the production process.

However, if the density of silanol groups on the surface of the porous silica is less than 0.5 μmol / m ² , the porous silica cannot provide a sufficient foam-improving effect, and this is less than 5 μmol / m ² . If the silica particles become too large, even if the silica surface is treated with trimethylsilica, recombination of the silanol groups will occur and the silica particles will coagulate and separate. / m is required to be ² in the range of things, this is also to the density of the alkoxy groups of the silica particle surface by replacing the alkoxy group with a trimethylsilyl group as a 0.5 ～10Myu mol / m ² Is required.

When the density of the trimethylsilyl group on the negative side of the porous silica is less than 0.5 μmol / m ² , the composition obtained by reducing the steric effect of the trimethylsilyl group and the wettability with dimethylpolysiloxane is reduced. it stability is lowered, since the limit density of trimethylsilyl groups that can be introduced into the silica surface is approximately 10μ mol / cm ^2, the density of the trimethylsilyl group is 0.5 ～10Myu
Mol / m ² is required.

The organic solvent used in the production of the silica sol is not particularly limited as long as it can disperse the above-mentioned spherical porous silica particles stably, and has a viscosity of 0.65 to 100 cS. Examples thereof include dimethylpolysiloxane oil, saturated aliphatic hydrocarbons having a boiling point of 70 to 300 ° C. under normal pressure, aliphatic alcohols, aromatic hydrocarbons and the like. It is preferable to use dimethylpolysiloxane oil because a solvent removing operation is not required during production.

Examples of the dimethylpolysiloxane oil include cyclic dimethylpolysiloxane such as hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, hexamethyldisiloxane,
Examples thereof include linear dimethylpolysiloxanes such as octamethyltrisiloxane, decamethyltetrasiloxane, dodecamethylpentasiloxane, and tetradecamethylhexasiloxane.

The finely divided silica used here may be a known one, and may be either wet silica or dry silica. This includes precipitated silica, silica xerogel, fumed silica, and the surface thereof. Examples thereof include those treated with an organic silyl group, and specifically, Aerosil [trade name manufactured by Nippon Aerosil Co., Ltd.], Nipsil [trade name manufactured by Nippon Silica Co., Ltd.], Cabosil [trade name manufactured by Cabot Corporation, USA], Santocell (trade name, manufactured by Monsanto Chemical Co., USA) and the like are preferable, and they preferably have a specific surface area of 100 m ² / g or more by a BET method.

The compound as the component B) used in the present invention is composed of 75 to 95% by weight of the above-mentioned dimethylpolysiloxane and 1 to 10% by weight of porous silica in an amount sufficient to supply organosilica sol and fine powdered silica 4 ~ 15% by weight, room temperature ~
It can be produced by heat-treating at 200 ° C. and, if necessary, removing low-boiling fractions. The blending amount of this component (B) in 100% by weight of the foam inhibitor composition of the present invention is 5% by weight.
When the amount is less than 50% by weight, the defoaming performance is not sufficiently exhibited, and when the amount is more than 50% by weight, the system is thickened and a problem occurs in workability, so that the amount is 5 to 50% by weight, more preferably 10 to 30% by weight. It is good to be a range.

Further, the foam suppressing composition of the present invention is constituted.
The polyoxyethylene-polyoxypropylene copolymer as the component (C) serves as an emulsification aid for emulsifying and dispersing the components A), B) and the component D) described below.
If the molecular weight is less than 500, the resulting composition will have poor stability over time, and if it exceeds 3,000, the viscosity will increase and the dispersibility will be affected.
It is required to be in the range of 3,000 to 3,000, preferably in the range of 1,500 to 2,500.

If the content of the ethyleneoxy group contained in the component C) is less than 10 mol%, the hydrophobicity becomes strong and the function as an emulsifying aid becomes insufficient, and if it exceeds 85 mol%, the hydrophilicity becomes poor. In this case too, the function as an emulsifying aid cannot be sufficiently exhibited, so that the content of ethyleneoxy groups must be in the range of 10 to 85 mol%, preferably 30 to 70 mol%. However, if the blending amount in 100% by weight of the foam inhibitor composition is less than 5% by weight, the storage stability is deteriorated, and if it is more than 50% by weight, the dilution stability of the composition is deteriorated. This is 5
The content may be in the range of 50 to 50% by weight, more preferably 10 to 30% by weight.

The dimethylpolysiloxane as the component D) constituting the foam inhibitor composition of the present invention is a linear one in which both molecular chain terminals are blocked with a monohydroxydimethylsilyl group. This is effective as a binder for the components A) and B) in the foam inhibitor composition of the present invention, and the hydroxyl group has a function of lowering the interfacial tension between the components A) and B) which are inherently less compatible. However, the viscosity is less than 10 cS, which causes oil spots.If the viscosity is higher than 500 cS, the viscosity cannot be reduced, and the effect of the addition is insufficient. Therefore, it is necessary that the viscosity be 10 to 500 cS, preferably 30 to 200 cS in order not to increase the viscosity of the foam inhibitor composition.

In addition, 100% by weight of the foam inhibitor composition of component D)
If the amount is less than 2% by weight, the above-mentioned effects are not sufficiently exhibited. If the amount is more than 20% by weight, the viscosity becomes too low, and the storage stability over time such as sedimentation of silica deteriorates. ~ 20% by weight, more preferably 5 ~
What is necessary is just to make it into the range of 15 weight%.

The foam suppressant composition of the present invention comprises the above-mentioned A) to D)
Although it can be obtained by mixing predetermined amounts of the components, it is sufficient that these components are uniformly mixed using, for example, a mixer such as a homomixer, and the mixing order is not particularly limited. It may be heated in the range of 40 to 150 ° C.

[0027] The foam inhibitor composition of the present invention thus obtained imparts excellent low foaming properties to the liquid to which it has been added for a long period of time. Because it has excellent mechanical stability under high shear and does not cause aggregation, it can be suitably used as an antifoaming agent for aqueous cutting oils or oils or general paints in various dyeing processes, and for internal addition of various oils. it can.

[0028]

Examples Next, synthesis examples of the organosilica sol used for the component B) of the present invention, examples of the present invention, and comparative examples will be given. In the examples, the viscosities measured at 25 ° C.
Various physical properties are values measured by the following test methods.

(Dilution stability test method)
100 g of the aqueous dispersion in a 200 ml glass beaker,
The storage stability at 1 ° C. for 1 day was visually evaluated as follows. ◎: Good emulsion and no oil floating were observed. …: There is some oil floating or silica precipitation. Δ: Lots of oil floating and silica sedimentation.

(Defoaming test method) In a 1,000 cc measuring cylinder, 100 g of a 0.2% aqueous sodium oleate solution was added.
1.0 g of a 10% aqueous dispersion of the foam inhibitor composition (1,
000 ppm), and the change over time of the foaming amount (foam amount + liquid amount) was measured at 25 ° C. by an air bubbling method in which air was blown at 1.0 liter / min through a glass diffuser stone.

Synthesis Example (Preparation of Organosilica Sol A) A 10% glass reaction flask equipped with a stirring motor, a dropping funnel and a thermometer was charged with 8.4% 29% aqueous ammonia.
g, 200 g of ion-exchanged water and 4,500 g of ethanol were stirred vigorously while maintaining the temperature at 35 ° C., and a solution composed of 560 g of tetramethoxysilane and 510 g of ethanol was added thereto.
The mixture was added dropwise over a period of time, and after the completion of the addition, the mixture was stirred for 30 minutes, and then the solution was taken out. 132 g of trimethylsilanol was slowly added to the obtained ethanol silica sol, followed by stirring at room temperature for 5 hours. After completion of the stirring, the mixture was concentrated with a rotary evaporator to obtain an ethanol-dispersed silica sol (ethanol sol) having a silica content of 27%.

To 300 g of this ethanol sol was added 270 g of octamethylcyclotetrasiloxane, and the ethanol was distilled off under reduced pressure using a SUS packing packed tower (28 mm φ, 750 mm height). The solvent was replaced with siloxane to obtain an organosilica sol A having a silica content of 25%.

The obtained organosilica sol A has a viscosity of 10 cS.
Was a colorless and transparent liquid. When the dispersed silica was observed with an electron microscope, it was confirmed that the silica was spherical particles having an average particle size of 9.5 μm. The specific surface area of the silica particles measured by the BET method using nitrogen adsorption was 420 m ² / g. When the surface state of the organosilica sol A was examined, the silanol group was 2.4 μmol / m ² and the ethoxy group was 5.7.
μmol / m ² and trimethylsilyl groups were present at 2.4 μmol / m ² .

Example 1 Component A) Average composition formula

Embedded image 650 g of a polyoxyalkylene-modified silicone oil having a viscosity of 950 cS,

Component B) Dimethyl silicone oil having a viscosity of 1,000 cS (B-
1) 100 g of wet silica (B-2) having an average particle size of 1.4 μm, a specific surface area of 300 m ² / g, and 100 g of organosilica sol A (B-3) having a mean particle size of 1.4 μm and 150 g in a glass 2-liter flask at 150 ° C. Heat treated for 3 hours, 12mm at 100mmHg under reduced pressure
The low-boiling substances were distilled off at 0 ° C. and mixed with a homomixer 150 g,

Component C) Formula

Embedded image 150 g of a polyoxyethylene-polyoxypropylene copolymer having a viscosity of 250 cS, component D) 80 g of a linear dimethyl silicone oil having a viscosity of 56 cS and having both ends of a molecular chain blocked with a monohydroxydimethylsilyl group , The above components A) to D) are mixed, and a homomixer
The mixture was stirred for 5 to 10 minutes to prepare a foam inhibitor composition a), and the dilution stability and defoaming properties of the composition were examined. As a result, the results shown in Table 1 below were obtained.

Example 2 The components (B-1) and (B-
2) A mixture obtained by treating the mixture of (B-3) in the same manner as in Example 1 except that the mixture was heat-treated at 200 ° C. for 3 hours, and used as components A) and C) in Example 1. , D) were treated in the same manner as in Example 1 to prepare a foam inhibitor composition b), and the dilution stability and defoaming properties of the composition were examined. The results shown in Table 1 below were obtained. Was done.

Example 3 As component B), 100 g of (B-2) in Example 1 and (B
-3) After stirring 100 g and toluene 1,500 g in a glass 3 liter flask at 100 to 110 ° C. for 4 hours, dimethylsilicone oil (B-4) having 439 g of (B-1) and a viscosity of 100 cS was added thereto. 439 g), and then toluene was distilled off. After stirring at 130-150 ° C. for 3 hours, the mixture was heated at 120 ° C. under reduced pressure at 100 mmHg for 2 hours to remove low-boiling substances, and mixed and stirred with a homomixer. Using 150 g of this product, it was treated in the same manner as in Example 1 together with the components A), C) and D) used in Example 1 to prepare a foam inhibitor composition c). Upon examining the defoaming properties, the results shown in Table 1 below were obtained.

Example 4 450 g of (B-1) in Example 1 and (B)
-2) 100 g and the organic solvent of the organosilica sol A were replaced by dimethyl silicone oil having a viscosity of 100 cS.
Of a solution (B-5) at a temperature of 150 ° C. for 3 hours to prepare 150 g of a solution prepared in the same manner as in Example 1, which was used together with the components A), C) and D) used in Example 1. A foam inhibitor composition d) treated in the same manner as in Example No. 1 was prepared, and the dilution stability and defoaming properties of the composition were examined. As a result, the results shown in Table 1 below were obtained.

Example 5 Component B) was heat-treated at 200 ° C. for 3 hours as in Example 4 to give 150 g, prepared in the same manner as in Example 1, which was used in Example 1) , C), and D) were processed in the same manner as in Example 1 to prepare a foam inhibitor composition e), and the dilution stability and defoaming properties of the composition were examined. The results were as shown in Table 1 below. was gotten.

Comparative Example 1 900 g of (B-1) in Example 1,
2) 100 g was heat-treated at 150 ° C. for 3 hours, mixed and stirred with a homomixer to make 150 g, and treated together with components A), C) and D) used in Example 1 in the same manner as in Example 1. To the foam inhibitor composition, the dilution stability of this thing,
Upon examining the defoaming properties, the results shown in Table 1 below were obtained.

Comparative Example 2 450 g of (B-1) in Example 1
2) 100 g and 450 g of (B-4) in Example 3 were treated in the same manner as in Comparative Example 1 to obtain 150 g, which was carried out together with components A), C) and D) used in Example 1. Example 1
A foam inhibitor composition was prepared in the same manner as described above, and the dilution stability and defoaming properties of this composition were examined.
The result as shown in was obtained.

Comparative Example 3 450 g of (B-1) used in Example 1 using component B)
2) 100 g and 450 g of (B-4) in Example 3 at 200 ° C.
Heat treated for 3 hours and prepared as in Example 1 150 g
And used as components A), C) and D) used in Example 1.
In addition, the same treatment as in Example 1 was carried out to prepare a foam inhibitor composition h), and the dilution stability and defoaming property of the foam inhibitor composition were examined. As a result, the results shown in Table 1 below were obtained.

[0044]

[Table 1]

[0045]

The present invention relates to a foam inhibitor composition, which comprises A) a polyoxyalkylene-modified silicone oil represented by the general formula (1), B) dimethylpolysiloxane and an organosilica sol, as described above. A compound comprising finely divided silica; C) a polyoxyethylene-polyoxypropylene copolymer; and D) a linear dimethylpolysiloxane having a molecular chain terminal capped with a monohydroxydimethylsilyl group. It is superior in dilution stability, defoaming continuity and high-temperature properties as compared with conventionally known silicone-based antifoaming agents. , Which is industrially advantageous because it is useful as an antifoaming agent for dyeing.

──────────────────────────────────────────────────続 き Continuation of front page (51) Int.Cl. ⁷ Identification code FI C08L 83/12 C08L 83/12 // (C08L 83/12 83:04 83:06) (56) References JP-A-2-2 75305 (JP, A) JP-A-58-5184 (JP, A) JP-A-56-158106 (JP, A) JP-A-56-48211 (JP, A) JP-A-49-24889 (JP, A) JP-A-5-57109 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B01D 19/04

Claims (2)

(57) [Claims] (1) A) a compound represented by the general formula: [G ¹ is a group selected from R ¹ , G ² or G ³ , and G ² and G ³ are compounds of the formula (CH ₂ ) _r -O (R ² O) _s -Q (R ² Ethylene group and propylene group, Q is a hydrogen atom or
8 is a monovalent organic group selected from an alkyl group, an acetyl group and an isocyanic acid group, r is a group represented by 2 to 6, s is 5 to 50), and G ² is a group represented by (R ² O) 10 to 30 ethyleneoxy groups
Mol%, and G ³ is such that the ethyleneoxy group in the (R ² O) group is 65 to 85 mol%, G ² / G ³ (molar ratio) is 0.3 / 1 to 3/1, R ¹
Is a monovalent hydrocarbon group having 3 to 20 carbon atoms, a is 0 or 1,
m and n are positive numbers of 1 to 30, p is 10 to 100, and q is a positive number of 1 to 10], 30 to 80% by weight of a polyoxyalkylene-modified silicone oil represented by the formula: 75-95% by weight of dimethylpolysiloxane of 100,000 cS and average particle size of 1-100mμ
The specific surface area is 300 m ² / g or more, the density of trimethylsilyl group is 0.5 to 10 μmol / m ² , and the density of alkoxy group is 0.5 to
10 μmol / m ² , silanol group density 0.5-5 μmol / m ²
Organosilica sol obtained by dispersing trimethylsilylation-treated porous silica particles in an organic solvent to provide 1 to 10% by weight of porous silica particles, and 4 to 15% by weight of finely divided silica. C) 5 to 50% by weight of a polyoxyethylene-polyoxypropylene copolymer having a molecular weight range of 500 to 3,000 and an ethyleneoxy group of 10 to 85% by mole; 2 to 20% by weight of a linear dimethylpolysiloxane having a viscosity at 25 ° C. of 10 to 500 cS, wherein both ends of the molecular chain are blocked with a dimethylmonohydroxysilyl group. Composition. 2. The foam inhibitor composition according to claim 1, wherein the organic solvent forming the organosilica sol in the component B) is dimethyl silicone oil having a viscosity at 25 ° C. of 0.65 to 100 cS.