JPH0573441B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to silicone-free antifoam compositions. It is highly desirable to use silicone-free antifoam agents in HT fiber finishing methods to avoid silicone oil stains on the fibers. Such stains are not easy to wash off without damaging the fibers. However, although many known silicone-free agents have good antifoam properties at low temperatures or even at temperatures of 98-100°C, they are ineffective or have insufficient activity under HT conditions, especially those in jet dyeing machines. It is. Other desirable properties of defoamers are not subject to application restrictions;
It concerns stability when dispersed in water, especially hard water. According to the present invention, stable silicone-free antifoam compositions are provided that are particularly active under HT conditions. The present invention provides a silicone-free, non-ionically dispersed antifoam composition comprising: (a) a compound of formula I: R-CO-NH-A-NH-CO-R () [ where each R is independently a saturated or unsaturated aliphatic hydrocarbon group having 13 to 21 carbon atoms that is unsubstituted or substituted with one hydroxyl, and A is a saturated or unsaturated aliphatic hydrocarbon group having 2 to 6 carbon atoms. (b) a polyethylene wax having a melting point of at least 80°C and an average molecular weight of 1000 to 20000; (c) a hydrophobic silica gel; (d) (d ₁ ) a natural hydrocarbon oil; ( d ₂ ) silicone-free, water-immiscible oil mixtures with natural vegetable oils, where each oil is liquid at 20 °C and has a boiling point of at least 100 °C; (e) (e ₁ ) an average of 6 to 10; ( _e2 ) a nonionic emulsifier mixture of a nonionic emulsifier with an average HLB value of from 10.1 to 12; where components (a), (b) and (e) are combined with component (d); Dissolved or dispersed, component (c) is dispersed in component (d). Compounds of formula are known, for example in J.Org.
Chem.20 (1955), 695−699 or H.Bennett,
“Industrial Waxes” (Chemical Publishing
Company Inc., NY, 1975), Volume 1, Chapter 7. The two radicals R are preferably the same, optionally substituted by one hydroxy group and the radical R-
CO- is an alkyl or alkenyl or a mixture of alkyl and alkenyl derived from fatty acids which are myristoyl, palmitoyl, stearoyl, oleoyl, ricinoleoyl or behenoyl, preferably palmitoyl, oleoyl, behenoyl and stearoyl, especially palmitoyl and stearoyl; is preferred. Preferred compounds of formula are those of formula a: R′CONH—(CH ₂ ) _o ′——NHCOR′ (a) [where n′ is 2 or 3 and the two R′s are the same C _16-18 alkyl or C _16-18 alkenyl or mixtures thereof]. Preferably n' is 2. Preferred polyethylene waxes are produced by Ziegler synthesis and have a melting point of 80 to 140°C, especially
90 to 130℃, more preferably m.
p.>110°C, especially 110-130°C. The hydrophobic silica of component (c) is preferably one obtained by surface treatment of colloidal silica having a large surface-to-volume ratio. Surface treatments that produce hydrophobicity are well known and include treatment with fatty alcohols, hydrocarbons, silicone oils or other organosilicon compounds, waxes or fatty amines. It is noteworthy that the surface treatment of component (c) with silicone does not result in free silicone in the compositions of the invention and that even compositions according to the invention containing silicone-surface-treated silica are considered silicone-free. . Fine powder silica that is made hydrophobic by surface treatment is "huyum silica" obtained by thermal decomposition,
Preference is given to silicic acid gels which are dehydrated without loss of structure or precipitated silicas obtained by aqueous chemical reactions. The finely divided silica preferably has a specific surface area of 50-600 m ² /g, which remains the same after treatment and imparts hydrophobicity. The silicone-free oil of component (d) is at least
Preferably it has a flash point of 60°C. Natural hydrocarbon oils suitable for use as component (d ₁ ) include those obtained by distillation of crude oil, bitumen and coal, for example:
Heavy petroleum or naphtha, boiling range 100-180℃
(C _8-10 ); kerosene or paraffin, boiling range
180−230℃ (C _11-12 ); Gas oil, boiling point 230−
305℃ (C _13-17 ); Light lubricating oil, boiling point range 305-405
°C (C _18-25 ); heavy lubricating oil, boiling point range 405-515 °C
(C _26-38 ); Isoparaffin, boiling point range 100-250
°C; alkyl aromatic obtained by catalytic reforming of crude oil, boiling range 190-300 °C; oil obtained from low-temperature coking of lignite or other bituminous materials. Preferably, the natural hydrocarbon oil has a boiling point above the temperature at which the antifoaming agent is used, preferably above 160°C, more preferably above 200°C. gas oil,
Particularly preferred are lubricating oils and high boiling isoparaffins. Vegetable oils suitable for use as component (d ₂ ) are primarily fatty acid triglycerides, which are usually complex mixtures of different triglycerides, each of which can be a triester of two or three different fatty acids. Ester-forming fatty acids may be saturated or unsaturated and may be substituted with one hydroxyl group. Examples of saturated-basic fatty acids and corresponding oxyacids include n-caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oxystearic acid, arachidic acid, behenic acid and lignoceric acid. I can list them. Examples of unsaturated glyceride-forming fatty acids are those with 10 to 24 carbon atoms, such as palmitoleic acid, oleic acid, elaidic acid, petroselic acid, gadoleic acid, erucic acid, linoleic acid, linolenic acid, stearolic acid and ricinoleic acid. be. Suitable vegetable oils containing glycerides of the aforementioned fatty acids include coconut oil, linseed oil, palm oil, olive oil, castor oil, peanut oil, rapeseed oil,
Includes sesame oil, cottonseed oil, corn oil, soybean oil, safflower oil, sunflower oil, and tung oil.
Among these, corn oil, rapeseed oil and peanut oil are preferred. Preferably, component (d ₂ ) of the composition of the invention is
Vegetable oils in which at least 40%, preferably at least 70% of the glyceride-forming fatty acids are ethylenically unsaturated fatty acids having at least 18 carbon atoms, especially oleic acid, linoleic acid, linolenic acid and erucic acid. Particularly preferred are oils in which the ester-forming unsaturated fatty acids are a mixture of monoethylenically unsaturated and diethylenically unsaturated acids. The weight ratio of component (d ₁ ) to component (d ₂ ) is preferably 3-1:1. Preferably, component (d) is a mixture of oils containing as component (d ₁ ) a lubricating oil and as component (d ₂ ) corn oil and/or peanut oil. In the absence of added water, the composition according to the invention consists of a continuous mixture in which components (a) and (b) are dissolved or dispersed as finely as possible in component (d) and component (c) is dispersed as finely as possible. Consists of phases. Calculating components (a), (b), (c) and (d) as percentages of the total weight, component (a)
and (c), considered separately and independently, is preferably 1-8%, more preferably 2-6%; the concentration of component (b) is preferably 0.5-8%, more preferably It is 1 to 5%. Nonionic emulsifiers suitable as component (e) include: polyalkylene glycols, especially ethylene oxide (EO)/propylene oxide (PO) copolymers; alkoxylation products of higher fatty alcohols or fatty acid amides; Polyethylene glycol ester; polyglycol derivative in which one OH group is esterified or etherified with a long-chain acyl or alkyl group and the other OH group is esterified or etherified with a short-chain acyl or alkyl group; polyfunctional fatty acid esters of fatty alcohols such as glycerol, mannitol and sorbitol, cyclic ethers of polyfunctional alcohols and polyadducts of polyfunctional alcohols with EO and/or PO; hydroxyalkyl fatty acid amides and their alkylene oxide adducts; Alkylated mono- and dialkylphenols. Preferred nonionic emulsifiers (e) are ethoxylated mono-, di- or triesters of sorbitol and the acid R ₁ -OH and/or compounds of the formula: R ₁ (-O-CH ₂ -CH ₂ ) _n --O-R ₂ ()

[C] R ₅ (-O-CH ₂ -CH ₂ ) _q --OH ()

[C] [Here, R ₁ is an acyl group of a C _12-18 fatty acid; R ₂ is hydrogen or an acyl group of a C _12-18 fatty acid; R ₃ is a C _8-12 alkyl; R ₄ is hydrogen or C _8-12 alkyl; R ₅ is primary or secondary C _9-18 alkyl or C _9-18
is an alkenyl group; m is 4-10; p is 3-12; q is 2-15; r and s are each at least 1, and r+
s is 2-15]. Among the above, compounds of the formula and and ethoxylated sorbitol are preferred. Particularly preferred are compounds of the formula and ethoxylated sorbitol esters. Preferred emulsifiers as component (e ₁ ) are compounds of the formula, especially those in which m is from 4 to 8, more preferably from 5 to
7 and R ₁ and R ₂ are each C _16-18 acyl. Preferred emulsifiers as component (e ₂ ) are compounds of the formula, especially those in which p is from 3 to
8, more preferably 4 to 7, and R ₄
is hydrogen, and/or an ethoxylated sorbitol ester. In the composition of the present invention, the emulsifier (e ₁ ) is 6.5 to
Preferably it has an average HLB value of 8. Preferably, the emulsifier ( _e2 ) has an average HLB value of 10.1-11. Although emulsifier (e ₁ ) and/or (e ₂ ) may each be a single compound, it is preferred that they are each present as a mixture of compounds. The emulsifier (e ₁ ) of the formula is a mono-emulsifier with a degree of esterification of 1 to 2.
and a mixture of diesters or partial esters. Preferably, the concentration of total emulsifier (e) is (a) + (b) + (c)
+(d)+(e)=100, 7-30%, especially 10-25%
It is. The weight ratio of emulsifier (e ₁ ) to emulsifier (e ₂ ) is conveniently between 0.2 and 2, preferably between 0.4 and 1.2. Compositions (a) + (b) + (c) + (d) + (e) not only have good antifoaming properties, but surprisingly they also have improved defoaming properties even when diluted with water, even hard water. It was also found that it has excellent stability. The compositions of the present invention can be easily diluted with water. The compositions of the invention can be mixed with an amount of water that is 70 to 95% by weight, preferably 80 to 90% by weight of the total weight of the aqueous composition to prepare a so-called stock dispersion. Such dispersions are O/W emulsions and can be further dispersed in water for use as antifoam agents in aqueous systems. The composition according to the invention has a rotational viscosity of 5 to 5 at room temperature.
It is an injectable liquid at room temperature of 5000 cp. The composition can be prepared simply by mixing the ingredients together. A preferred sequence of operations is to dissolve or disperse component (b) in oil (d ₁ ) and
(a) is separately dissolved or dispersed in oil (d ₂ ), then 2
The order is to mix the two oil solutions or dispersions with each other and add the components (c ₁ ), (e ₁ ) and (e ₂ ) and optionally further oil (d ₁ ). The resulting composition can be diluted immediately with water. The antifoam compositions of the present invention can be added to aqueous systems that are prone to foaming and where bubbles have not yet formed to prevent or inhibit the formation of bubbles. The antifoam compositions of the present invention can also be added to aqueous systems containing foam to completely or partially destroy the foam present and/or to limit or prevent further foaming from occurring. . Aqueous systems with a tendency to foam are used in many technological processes, for example in the preparation of latexes, adhesives, starches, cellulose and sugars: in particular when mixing aqueous sludges in sewage treatment or in the flotation of ores or dispersible wastes; in particular during the production of paper and non-woven fabrics in high-speed machines; and aqueous systems containing air-forming components, such as polymer dispersions, acrylic resins, leather treatment liquids, such as degreasing liquids, fiber treatment liquids (especially dyes or fluorescent brighteners). (containing baths with activators), and in the presence of paper coating systems. Preferred applications include foaming in aqueous fiber treatment liquids that may be applied to the fibers at any processing stage including sizing, pre-treatment, fluorescent brightening treatments, dyeing or printing, anti-wrinkle treatments and other post-treatment operations. It is prevention. "Fiber" refers to coarse fibers, filaments,
processed yarn, yarn, skein, spooled yarn, woven fabric,
It is used in a broad sense to include textiles in all stages of manufacture, including knitted or tufted fabrics, felts, carpets, and semi-finished or finished products. The nature of the fiber (natural, synthetic or semi-synthetic) is not important. Such fluids can be applied by any conventional method such as padding or atmospheric or high pressure exhaustion. The composition of the present invention can be prepared under pressure in a closed container, especially under HT conditions, i.e., at 100°C or higher.
Preferably 102-160℃, more preferably 105-
Particularly suitable for use in textile treatment fluids applied at temperatures of 150°C. The compositions of the present invention are suitable for use in winchbecks and other high speed equipment such as jet dyeing machines where the tendency for bubble formation is high and the bubbles tend to expand when the pressure is removed due to water vapor production and rapid movement of fibers and liquids. Particularly useful. The processing liquid contains various processing agents such as sizing agents, fiber conditioning agents, desizing agents, detergents, bleaching agents, wetting agents, resin processing systems, softeners, antistatic agents, fluorescent brighteners and dyes: and dyeing aids. For example, carriers, leveling agents and dispersants can be included. The compositions of the present invention are particularly useful when the aqueous liquid contains a treatment agent or adjuvant that promotes bubble formation;
Effectively reduces bubble formation without adversely affecting substrate processing. Particular preference is given to use in dyebaths containing disperse dyes, especially under HT conditions. The compositions of the invention can be added to the aqueous processing liquid at the beginning and/or during processing, for example as a neat dispersion, either neat or after dilution with water. The concentration of the composition according to the invention is determined by the concentration of the components in the aqueous system.
Preferably at least 0.0001 g/calculated based on (a), (b), (c), (d) and (e). The optimum concentration for a given system will vary significantly depending on the nature of the system, processing conditions, specific composition used and desired effect;
It can be easily determined by a simple test. Preferred concentrations of water-free compositions in aqueous systems are 0.0001-5 g/, more preferably
0.001-1 g/Kg, but in paper coating systems, the concentration is preferably 0.0001-0.1 g/Kg, more preferably 0.0001-0.01 g/Kg. The invention is illustrated by the following examples (all parts are parts by weight and all temperatures are in °C). Example 1 (i) Preparation of N',N-distearoylethylenediamine dispersion 30.8 parts of N',N-distearoylethylenediamine and 123.0 parts of peanut oil (D ₂ ) are heated under vacuum with stirring to form a transparent dispersion. Obtain a homogeneous solution. The resulting solution is added to 119.8 parts of peanut oil at room temperature while stirring under vacuum (30-60 mbar). A dispersion forms, which is cooled to room temperature. (ii) Preparation of polyethylene wax dispersion 21.4 parts of polyethylene wax (B ₁ ) and
213.9 parts of mineral oil (D ₁ ) are heated until a clear solution is obtained. Stop heating and allow the solution to cool to room temperature while stirring. A fine dispersion is produced. (iii) Preparation of final product 273.6 parts of the dispersion product of (i) was added to the polyethylene wax dispersion obtained in (ii) above, and then
Add 29.8 parts of hydrophobic silica (C ₁ ). As soon as the silica is completely dispersed, increase the pressure to 30−
The pressure is reduced to 60 mbar and the mixture is stirred vigorously until a homogeneous fine dispersion forms. The stirring speed was then reduced, the vessel was purged with air, and then 316.1 parts mineral oil (D ₁ ) 72.6 parts emulsifier (E ₁ )
and 72.6 parts of emulsifier ( _E2 ) are added. The product (1000 parts) is a finely fluid dispersion with the following composition: _C17H35 - _CO -NH-( _CH2 ) _2- NH-CO-
C ₁₇ H ₃₅ 3.1% Polyethylene wax (B ₁ ) 2.1% Hydrophobic silica (C ₁ ) 3.0% Mineral oil (D ₁ ) 52.9% Peanut oil (D ₂ ) 24.3% Emulsifier (E ₁ ) 7.3% Emulsifier (E _{2 )} ) 7.3% (iv) Identification of starting materials Polyethylene wax (B ₁ ) Molecular weight 2000-5000 Specific gravity 0.92-0.94 mp 118-123℃ Water content <0.3% Acid value 0 Soap value 0 Hydrophobic silica (C ₁ ) ( Sipernar 10 derived from silica hydrogel (Dextsa) Specific surface area (BET) 90 m ² /g Average particle size 18 nm Bulk density (DIN 53194) 100 g / Loss on drying (DIN 55921) 3% Loss on ignition (DIN 55921) 7% 1: 1 in a 5% dispersion in water/methanol.
PH (DIN53200) 8.5 SiO ₂ content 98% Na ₂ O content 0.8% SO ₃ content 0.8% Amount retained during sieving (DIN 53580) 0.01% Mineral oil (D ₁ ) BP range at normal pressure of the hydrocarbon mixture specified below 320 −390° Specific gravity 0.85−0.95 Water content <0.1% Acid value <1 Aniline point 70−80 Refractive index n ²⁰ _D 1.483−1.486 Iodine number 20−30 Flash point 165° Emulsifier (E ₁ ): C ₁₇ H ₃₃ CO (-OC ₂ H ₄ ) _6.5 --O・
1:1 molar mixture of CO・C ₁₇ H ₃₃ and C ₁₇ H ₃₃ CO(-OC ₂ H ₄ ) _6.5 --OH Average HLB value 7.0 Emulsifier (E ₂ ):

[Chemical formula] HLB value = 10.4 Example 2 To 20 parts of the above composition, 80 parts of deionized water are added at room temperature with stirring. A stable milky dispersion is obtained. Example 3 A milky dispersion is obtained according to the procedure of Example 2, except that 80 parts of 20° dH water are used. This dispersion is stable at room temperature for at least 12 hours. Example 4 10 parts of polyoxyethylene 20-sorbitol
Trioleate (HLB value = 11.0) is added to 100 parts of the dispersion obtained in Example 1 with stirring. In the application examples below, the composition of Example 1 is used as the aqueous dispersion of Example 2. Application example A Pre-washed polyester cloth (Dacron T54-5
-761) in a jet dyeing machine with a capacity of 1200 ml using 600 mm of an aqueous dye liquor of the following composition: 5% (based on the weight of the base fabric) CI Dispered 167 1 g/leveling agent (30 moles of EO) condensed
C _16-18 fatty alcohol, iodine number = 55) 1 g/dispersant (funnel oil) 2 g/ammonium sulfate adjusted to PH 5 to formic acid 0.65 g/composition of Example 1 The fabric:liquid ratio was 1:20; Liquid circulation speed is 1.5
/minute. The liquid is heated from 30° to 130° over 30 minutes, the apparatus is closed at 80°, and the pressure is increased to over 1 atmosphere with air. Once 130° is reached, staining is continued at this temperature for 60 minutes, then the liquid is cooled and the pressure is removed when the temperature has decreased to 85°. There is significantly less bubble formation than in the absence of the composition of Example 1. Application example B Repeat application example A with the following exceptions. The liquid is
Contains 0.5g/leveling agent, but no dispersing agent. The cloth:liquid ratio is 1:25 and the circulation rate is 1.9g/. Heat the bath from 30° to 130° over 50 minutes, hold at 130° for 30 minutes, then cool. There is significantly less bubble formation than in the absence of the composition of Example 1. Application Example C Cotton creton was dyed in the same jet dyeing machine as in Example A using the following dye solution (600 ml) at a fabric/liquid ratio of 1:20 and a circulation rate of 1.5/min. 10% (based on base fabric) CI Reactive Blue 116 60g/g Glauber's salt 20g/soda 0.75g/composition of Example 1 The liquid was heated from 30° to 60° over 30 minutes; in
Hold for 60 minutes, then cool to 40°. The amount of bubbles produced is significantly lower than in the absence of the composition of Example 1. Application example D Wool gear bagine is mixed with the following liquid using the same equipment as in example A.
Using 600ml, cloth/liquid ratio 1:20, circulation rate 1.5/
Stain in minutes. 1.0% (based on base fabric) CI acid black
52 0.5 g/leveling agent of Example A 10.0% (based on base fabric) concentrated sulfuric acid 0.5 g/composition of Example 1 Heat the liquor from 30° to 98° over 30 minutes;
Hold for 60 minutes, then cool to 40°. There is significantly less foam formation than when the composition of Example 1 is omitted. Application Example E A paper coating paste is prepared with the following composition: 26.73% Kaolin 0.05% Sodium Tripolyphosphate 0.01% Sodium Polyacrylate 0.03% Caustic Soda 5.35% Dow-Latex 620 67.83% Water Composition of Example 1 0.02% (based on the weight of kaolin) is added. This product is called “Wochenblatt”
104 , 117-8 (1976)
,
Test with the apparatus described in No. 3 (H.Pummer). Foam formation in the application paste is significantly reduced by the presence of the composition of Example 1. Application example F A polyester fabric is dyed under HT conditions in a Gaston County Minijet machine with a capacity of 650 (30 kg base fabric) using a dye liquor with a particularly high tendency to bubble formation. Base fabric: polyester, pre-washed and pre-fixed,
17Kg = 260m Dye solution: 450 deionized water containing the following ingredients 0.95 (based on base fabric) CI dispersion thread
167 1 g/leveling agent of example A 1 g/dispersing agent of example A 2 g/ammonium sulphate 200 ml formic acid (taken to pH 5) 0.65 g/product of example 1 Fabric:liquid ratio 1:26, fabric speed 75m/min. from 60°
Heat to 126° for 2 hours, hold at 126° for 30 minutes, cool from 126° to 60° for 30 minutes. No bubble formation was observed during the entire process. Examination of the dyed article reveals that there are no spots or uneven areas due to the antifoam agent. Application example G Polyester fabric is dyed in a Zen-soft low-jet machine under HT conditions. Base fabric: Smooth circular knitted targal cloth, 130g/m ² ,
110dtex, 20Z15, 9.1Kg. Fill the machine with cold tap water at 5°dH, giving a liquid to fabric ratio of 1:15. While heating to 50°, the following ingredients are added in the following order: 0.2 g/product of Example 1 2.0 g/monosodium phosphate 1.4 g/product of Example 14 of US Pat. No. 4,186,119 1.0 g / funnel oil Once it reaches 50°C, add 0.05% CI Disperse Orange 30 and adjust the PH to 5.2 with acetic acid.
Increase the temperature to 90° at 1°/min, 130° at 4°/min,
Hold at 130° for 30 minutes, then cool to 50°, drain waste, and perform one cold rinse. No bubble formation was observed during the dyeing process. The composition of Example 1 can also be used as the aqueous dispersion of Example 3 in the steps of Application Examples A-G. Similar good results are obtained. Example 2 by replacing the composition of Example 1 with the composition of Example 4
Similar good results are obtained when added as an aqueous dispersion as described in .

Claims (1)

[Scope of Claims] 1. A silicone-free, non-ionically dispersed antifoam agent, characterized in that it consists of the following components: (a) Compound of formula I: R-CO-NH-A-NH-CO -R () [where each R is independently the number of carbon atoms that are unsubstituted or substituted with one hydroxyl]
13 to 21 saturated or unsaturated aliphatic hydrocarbon groups, and A is a linear alkylene chain having 2 to 6 carbon atoms]; (b) having a melting point of at least 80°C and an average molecular weight of 1000 to 20000; (c) a hydrophobic silica gel; (d) a silicone-free, water-immiscible oil mixture of (d ₁ ) a natural hydrocarbon oil; (d ₂ ) a natural vegetable oil, where each oil is heated at 20°C; and (e) (e ₁ ) a nonionic emulsifier having an average HLB value of 6 to 10; and (e ₂ ) a nonionic emulsifier having an average HLB value of 10.1 to 12. a nonionic emulsifier mixture; wherein components (a), (b) and (e) are dissolved or dispersed in component (d), and component (c) is dispersed in component (d). 2. Claim 1 in which component (a) has formula Ia
Antifoaming agent described in section: R'CONH-( _CH2 ) _o '--NHCOR' (a) [Here, the two R's are the same and have a carbon number of 16-
18 alkyl or alkenyl or a mixture thereof, and n' is 2 or 3]. 3. The antifoaming agent according to claim 2, wherein component (a) is N,N'-distearoylethylenediamine. 4. Claims 1 to 4, wherein component (b) is a polyolefin wax having a melting point of 90-130°C.
The antifoaming agent according to any one of Item 3. 5. The antifoaming agent according to any one of claims 1 to 4, wherein the component (d ₁ ) is selected from gas oil, lubricating oil, and high-boiling isoparaffin. 6. The antifoaming agent according to any one of claims 1 to 5, wherein the component (d ₂ ) is a vegetable oil in which at least 40% of the glyceride-forming fatty acids are ethylenically unsaturated fatty acids having at least 18 carbon atoms. agent. 7. The antifoaming agent according to claim 6, wherein component ( _d2 ) is selected from corn oil, rapeseed oil and peanut oil. 8 The weight ratio of component (d ₁ ) to component (d ₂ ) is 3-1:
1, the antifoaming agent according to any one of claims 1 to 7. 9. Any of claims 1 to 8, wherein the emulsifier (e) is selected from ethoxylation products of sorbitol mono-, di- or triesters with acid R ₁ OH and compounds of formula ~ Antifoaming agent described in: R ₁ (-O-CH ₂ -CH ₂ ) _n --O-R ₂ () [Chemical] R ₅ (-O-CH ₂ -CH ₂ ) _q --OH () [ ] [Here, R ₁ is an acyl group of a C _12-18 fatty acid; R ₂ is hydrogen or an acyl group of a C _12-18 fatty acid; R ₃ is a C _8-12 alkyl; R ₄ is is hydrogen or _C8-12 alkyl; _R5 is a primary or secondary _C9-18 alkyl or _C9-18 alkenyl group; m is 4-10; p is 3-12; q is 2-15; and r and s are each at least 1 and r+s is 2-15]. 10. Antifoaming agent according to claim 9, wherein the emulsifier (e ₁ ) is a compound of formula. 11 The emulsifier (e ₁ ) has m of 4 to 8 and R ₁
and R ₂ are each C _16-18 acyl. 12. Antifoaming agent according to any of claims 9 to 11, wherein the emulsifier (e ₁ ) has an average HLB value of 6.5 to 8. 13. Antifoaming agent according to claim 9, wherein the emulsifier ( _e2 ) is a compound of formula and/or an ethoxylated sorbitol ester. 14. An antifoaming agent according to claim 13, wherein in the compound of formula 14, p is 3 to 8 and _R4 is hydrogen. 15. Antifoaming agent according to any of claims 9 to 14, wherein the emulsifier ( _e2 ) has an average HLB value of 10.1 to 11. 16 Based on (a) + (b) + (c) + (d) + (e) = 100, 7
An antifoam agent according to any of claims 1 to 15, containing ~30% total emulsifier (e). 17 The weight ratio of emulsifier (e ₁ ) to emulsifier (e ₂ ) is
Claims 1 to 16, which are 0.2 to 2.
The antifoaming agent according to any of paragraphs. 18 70-95% by weight based on the total weight of the aqueous defoamer
Claims 2 to 17 containing water of
The antifoaming agent according to any of paragraphs. 19 Components (a) to (e) below: (a) Compounds of Formula I; R-CO-NH-A-NH-CO-R () (wherein each R is independently unsubstituted or Number of carbons substituted with one hydroxyl
13 to 21 saturated or unsaturated aliphatic hydrocarbon groups, and A is a straight alkylene chain having 2 to 6 carbon atoms); (b) having a melting point of at least 80°C and an average molecular weight of 1000 to 20000; (c) a hydrophobic silica gel; (d) a silicone-free, water-immiscible oil mixture of (d ₁ ) a natural hydrocarbon oil; (d ₂ ) a natural vegetable oil, where each oil is and (e) (e ₁ ) a nonionic emulsifier having an average HLB value of 6 to 10 and (e ₂ ) a nonionic emulsifier having an average HLB value of 10.1 to 12. a nonionic emulsifier mixture with; wherein components (a), (b) and (e) are dissolved or dispersed in component (d), and component (c) is dispersed in component (d); A method for producing a nonionically dispersed antifoaming agent that does not contain silicone, wherein component (a) is combined with component (d ₂ ).
solution or dispersion dissolved or dispersed in component (b)
A solution or dispersion of dissolved or dispersed in component (d ₁ ) and component (c), component (e ₁ ) and component (e ₂ )
A method for producing the antifoaming agent, characterized in that the method comprises the step of mixing with each other. 20 Ingredients (a) to (e) below: (a) Compound of Formula I: R-CO-NH-A-NH-CO-R () (where each R is independently unsubstituted or Number of carbons substituted with one hydroxyl
13 to 21 saturated or unsaturated aliphatic hydrocarbon groups, and A is a straight alkylene chain having 2 to 6 carbon atoms); (b) having a melting point of at least 80°C and an average molecular weight of 1000 to 20000; (c) a hydrophobic silica gel; (d) a silicone-free, water-immiscible oil mixture of (d ₁ ) a natural hydrocarbon oil; (d ₂ ) a natural vegetable oil, where each oil is heated at 20°C; and (e) (e ₁ ) a nonionic emulsifier having an average HLB value of 6 to 10; and (e ₂ ) a nonionic emulsifier having an average HLB value of 10.1 to 12. a nonionic emulsifier mixture consisting of; wherein components (a), (b) and (e) are dissolved or dispersed in component (d), and component (c) is dispersed in component (d); 1. A method for reducing foam formation in an aqueous system, comprising adding to the aqueous system an effective amount of a silicone-free non-ionically dispersed antifoam agent. 21. The method according to claim 20, wherein the aqueous system is a fiber treatment liquid. 22. The method according to claim 20, wherein the fiber treatment is carried out under HT conditions. 23 Components (a) to (e) below: (a) Compound of formula I: R-CO-NH-A-NH-CO-R () [wherein each R is independently unsubstituted or Number of carbons substituted with one hydroxyl
13 to 21 saturated or unsaturated aliphatic hydrocarbon groups, and A is a linear alkylene chain having 2 to 6 carbon atoms]; (b) having a melting point of at least 80°C and an average molecular weight of 1000 to 20000; (c) a hydrophobic silica gel; (d) a silicone-free, water-immiscible oil mixture of (d ₁ ) a natural hydrocarbon oil; (d ₂ ) a natural vegetable oil, where each oil is heated at 20°C; and (e) (e ₁ ) a nonionic emulsifier having an average HLB value of 6 to 10; and (e ₂ ) a nonionic emulsifier having an average HLB value of 10.1 to 12. a nonionic emulsifier mixture consisting of; wherein components (a), (b) and (e) are dissolved or dispersed in component (d), and component (c) is dispersed in component (d); characterized in that it contains 0.0001-5 g/1 silicone-free non-ionically dispersed antifoaming agent for components (a), (b), (c), (d) and (e);
Fiber treatment liquid. 24. Claim 23, consisting of a dyebath comprising a disperse dye and 0.001-1 g/1 of said antifoaming agent.
The fiber treatment liquid described in section.