WO2023284979A1 - Entschäumerzusammensetzungen mit polydimethylsiloxane, organopolysiloxanharze, alkylether und ohne 2,2,4-trimethyl-1,3-diisobutyryloxypentan - Google Patents
Entschäumerzusammensetzungen mit polydimethylsiloxane, organopolysiloxanharze, alkylether und ohne 2,2,4-trimethyl-1,3-diisobutyryloxypentan Download PDFInfo
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- WO2023284979A1 WO2023284979A1 PCT/EP2021/069972 EP2021069972W WO2023284979A1 WO 2023284979 A1 WO2023284979 A1 WO 2023284979A1 EP 2021069972 W EP2021069972 W EP 2021069972W WO 2023284979 A1 WO2023284979 A1 WO 2023284979A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
- B01D19/04—Foam dispersion or prevention by addition of chemical substances
- B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
- B01D19/0409—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance compounds containing Si-atoms
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- 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
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
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- 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
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
- C11D1/72—Ethers of polyoxyalkylene glycols
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- 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
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- 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
- C11D3/12—Water-insoluble compounds
- C11D3/1213—Oxides or hydroxides, e.g. Al2O3, TiO2, CaO or Ca(OH)2
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- 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
- C11D3/12—Water-insoluble compounds
- C11D3/124—Silicon containing, e.g. silica, silex, quartz or glass beads
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- 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
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- 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
- C11D3/43—Solvents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/04—Surfactants, used as part of a formulation or alone
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2307/00—Location of water treatment or water treatment device
- C02F2307/12—Location of water treatment or water treatment device as part of household appliances such as dishwashers, laundry washing machines or vacuum cleaners
Definitions
- the invention relates to a method for defoaming aqueous media, in particular aqueous surfactant formulations, using defoamer compositions based on polysiloxanes.
- This foam can be controlled mechanically or by adding defoamers.
- Siloxane-based defoamers have proven particularly effective in this regard.
- Defoamers based on siloxanes are produced, for example, according to DE-AS 1519 987 by heating hydrophilic silica in polydimethylsiloxanes.
- WO 2019/057754 discloses the use of concentrates containing polysiloxanes, ester or mineral oils, nonionic surfactants and solvents and optionally water and acids in amounts of 0 to 5% by weight in fabric softeners.
- the object was to provide compositions which, when used as defoamers for aqueous media, in particular aqueous surfactant formulations, have good compatibility with the aqueous medium and good activity even after storage.
- the invention relates to a method for defoaming aqueous media, preferably aqueous surfactant formulations, using compositions containing (A) polydimethylsiloxanes of the general formula in which
- R means a methyl radical
- R 1 is a methyl radical or a radical OR 2 ,
- R 2 can be the same or different and is a hydrogen atom or a monovalent hydrocarbon radical having 1 to 4 carbon atoms, n is an integer,
- R 3 can be the same or different and is a hydrogen atom or a monovalent, SiC-bonded hydrocarbon radical
- R 4 may be the same or different and is hydrogen or a monovalent hydrocarbon radical, a is 0, 1, 2 or 3 and b is 0, 1, 2 or 3, with the proviso that the sum of a+b ⁇ 3 and in less than 50% of all units of the formula (II) in the organopolysiloxane resin, the sum of a+b is 2,
- R 5 is a monovalent hydrocarbon radical having 6 to 30 carbon atoms, m is an integer,
- R 6 (OR 7 ) p OR 8 (IV) where R 6 can be the same or different and is a hydrogen atom or a monovalent, optionally substituted hydrocarbon radical having 1 to 6 carbon atoms,
- R 7 can be the same or different and is a divalent, optionally substituted hydrocarbon radical having 1 to 6 carbon atoms
- R 8 is a monovalent, optionally substituted hydrocarbon radical having 1 to 8 carbon atoms, p is 1, 2 or 3,
- (H) optionally an alkaline or acidic catalyst or its reaction product with components (A) to (F). with the proviso that the use of 2,2,4-trimethyl-1,3-diisobutyryloxypentane is excluded.
- the radical R 2 is preferably the hydrogen atom, the methyl radical or the ethyl radical.
- the radical R 3 is preferably a hydrocarbon radical having 1 to 30 carbon atoms, particularly preferably a hydrocarbon radical having 1 to 6 carbon atoms, in particular the methyl radical.
- radical R 3 examples include alkyl radicals such as methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, iso- Pentyl, neopentyl, tert-pentyl, hexyl, such as n-hexyl, heptyl, such as n-heptyl, octyl, such as n-octyl, and iso-octyl, such as 2,2,4-trimethylpentyl , nonyl radicals, such as the n-nonyl radical, decyl radicals, such as the n-decyl radical, dodecyl radicals, such as the n-dodecyl radical, hexadecyl radicals, octade
- radicals R 4 are the hydrogen atom or the radicals given for the radical R 3 .
- the radical R 4 is preferably the hydrogen atom or a hydrocarbon radical having 1 to 4 carbon atoms, in particular the hydrogen atom, the methyl radical or the ethyl radical.
- the radical R 5 is preferably an aliphatic hydrocarbon radical having 6 to 30 carbon atoms, for example alkyl radicals such as n-hexyl, 2-ethylhexyl, n-dodecyl, isodridecyl and 2-octyldodecyl radical, or cycloalkyl radicals such as methylcyclohexyl radical, in particular around the 2-octyldodecyl residue.
- alkyl radicals such as n-hexyl, 2-ethylhexyl, n-dodecyl, isodridecyl and 2-octyldodecyl radical
- cycloalkyl radicals such as methylcyclohexyl radical, in particular around the 2-octyldodecyl residue.
- radical R 6 examples include the hydrogen atom or alkyl radicals, such as methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl , isopentyl, neopentyl, tert-pentyl, hexyl, such as n-hexyl, Preferred examples of the R 6 radical are the hydrogen atom, the methyl radical or the ethyl radical, with the hydrogen atom being particularly preferred.
- R 7 radical examples include optionally branched alkylene radicals, such as the 1,2-ethylene radical, 1,2-propylene radical, 1,3-
- the radical R 8 are alkyl radicals such as methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, iso- Pentyl, neopentyl, tert-pentyl, hexyl, such as n-hexyl, phenyl, benzyl, especially methyl or n-butyl.
- the value for a is preferably equal to 3 or 0.
- m is preferably an integer, m being chosen such that the polyorganosiloxanes of the formula (III) preferably have a viscosity of from 10 to 10,000 mPa -s, preferably from 20 to 1000 mPa -s, in particular from 40 to 200 mPa -s, each measured at 25°C and a shear rate of 1/s.
- Index m thus preferably has the value from 5 to 500, preferably from 15 to 200, in particular from 30 to 100.
- the polysiloxanes (A) have a viscosity of preferably from 10 to 1,000,000 mPa -s, particularly preferably from 50 to 100,000 mPa -s, in particular from 100 to 10,000 mPa -s, measured in each case at 25° C. and a shear rate of 1/ s.
- Index n in the polysiloxanes (A) of the formula (I) is therefore preferably from 5 to 2500, preferably from 20 to 1000, in particular from 70 to 500.
- the polysiloxanes (A) are commercially available products or can be prepared by any of the methods hitherto known in organosilicon chemistry, such as, for example, by cohydrolysis of the corresponding silanes.
- Polysiloxanes (A) can be branched, for example through the incorporation of RSiO 3 / 2 ⁇ or SiC> 4/2 units, up to a maximum of 5% of all units. These branched or partially crosslinked polysiloxanes then have viscoelastic properties.
- the polysiloxanes (A) are preferably linear.
- the antifoam compositions according to the invention contain the polysiloxanes (A) preferably in amounts of 3 to 70 percent by weight, preferably 4 to 60 percent by weight, in particular 5 to 50 percent by weight, based in each case on the total weight of the antifoam compositions.
- Component (B) is preferably a pulverulent, preferably hydrophobic, filler.
- Component (B) preferably has a BET surface area of from 20 to 1000 m 2 /g, a particle size of less than 10 ⁇ m and an agglomerate size of less than 100 ⁇ m.
- component (B) examples include silicon dioxide (silicic acids), titanium dioxide, aluminum oxide, metal soaps, ground quartz, PTFE powder, fatty acid amides, e.g. B.
- Ethylene bis stearamide, finely divided hydrophobic polyurethanes Ethylene bis stearamide, finely divided hydrophobic polyurethanes.
- Component (B) is preferably silicon dioxide (silicic acids), titanium dioxide or aluminum oxide, in particular with a BET surface area of 20 to 1000 m 2 /g, a particle size of less than 10 ⁇ m and an agglomerate size of less than 100 ⁇ m.
- component (B) are silicic acids, particularly preferably those with a BET surface area of from 50 to 800 m 2 /g, in particular those with a BET surface area of from 80 to 500 m 2 /g. These silicas can be pyrogenic or precipitated be silica. Both pretreated silicic acids, ie commercially available hydrophobic silicic acids, and hydrophilic silicic acids can be used as component (B). The degree of hydrophobicization is characterized by the methanol number. This is determined in accordance with DE 2107082 A1 by adding 0.2 g of the silica to 50 ml of water. While stirring, methanol is added until the silica is completely wetted and suspended in the liquid.
- the methanol number is the percentage of methanol in the liquid mixture that just wets the silica.
- Silicic acids with a methanol number of more than 30, in particular more than 50, are preferably used as pretreated hydrophobic silicas.
- hydrophobic silicas examples include HDK® H2000, a fumed silica treated with hexamethyldisilazanes with a BET surface area of 140 m 2 /g (commercially available from Wacker-Chemie AG, Kunststoff, Germany) and a precipitated silica treated with polydimethylsiloxane having a BET surface area of 90 m 2 /g (commercially available under the name "Sipernat D10" from Evonik Resource Efficiency GmbH, Hanau, Germany).
- hydrophilic silicas can also be rendered hydrophobic in situ if this is advantageous for the desired effectiveness of the antifoam formulation.
- Processes for rendering silicas hydrophobic are widely known.
- the in situ hydrophobing of the hydrophilic silica can be z. B. by heating the silica dispersed in component (A) at temperatures of 100 to 200° C. for several hours.
- the reaction can be supported by adding catalysts, such as KOH, and hydrophobing agents, such as short-chain OH-terminated polydimethylsiloxanes, silanes or silazanes. This treatment is too possible when using commercially available hydrophobic silicic acids and can contribute to an improvement in effectiveness.
- a further possibility is the use of a combination of in situ hydrophobic silicic acids with commercially available hydrophobic silicic acids.
- preferably 0.2 to 5 parts of pretreated hydrophobic silica are used per 1 part of in situ hydrophobic silica.
- Fillers (B) are preferably used in the antifoam compositions according to the invention in amounts of 0.5 to 15 percent by weight, preferably 1.0 to 10 percent by weight, in particular 1.5 to 7.5 percent by weight, based in each case on the total weight of the antifoam compositions .
- Component (C) is particularly preferably an organopolysiloxane resin consisting essentially of R 3 3 SiO 1 /2 (M) and SiO 4/2 (Q) units, where R 3 has the meaning given above.
- Organopolysiloxane resins consisting essentially of R 3 3SiOi/2(M) and S1O4/2(Q) units are also referred to as MQ resins.
- the molar ratio of M to Q units is preferably in the range from 0.5 to 2.0, preferably in the range from 0.6 to 1.0.
- the organopolysiloxane resins (C) can also contain up to 10% by weight of free, Si-bonded hydroxy or Ci-4-alkoxy groups.
- R 3 is preferably a methyl radical.
- the organopolysiloxane resins (C) preferably have a viscosity greater than 1000 mPa.s at 25.degree. C. or they are solids.
- the weight-average molecular weight Mw (based on a polystyrene standard) of these resins, determined using gel permeation chromatography, is preferably 200 to 200,000 g/mol, in particular 1000 to 20,000 g/mol.
- the organopolysiloxane resins (C) used according to the invention are preferably at least 100 g/l soluble in benzene at a temperature of 25° C. and a pressure of 101.325 kPa.
- Organopolysiloxane resins (C) are used in the antifoam compositions according to the invention in amounts of preferably at least 0.1 percent by weight and preferably at most 15 percent by weight, preferably at most 10 percent by weight, in particular at most 7.5 percent by weight, based in each case on the total weight of the antifoam compositions.
- the optionally used organopolysiloxanes (D) have a viscosity of preferably 10 to 10,000 mm 2 /s at 25.degree.
- organopolysiloxanes (D) used if appropriate are those organopolysiloxanes of the general formula (III) in which R 5 is a linear and/or branched hydrocarbon radical having at least 6 carbon atoms. Products of this type are produced, for example, by alkaline-catalyzed condensation of silanol-terminated polydimethylsiloxanes having a viscosity of 10 to 10,000 mPa'S at 25° C.
- aliphatic alcohols having more than 6 carbon atoms such as n-hexanol, 2-ethylhexanol, n-dodecanol, isodridecanol, 2-octyldodecanol or methylcyclohexanol accessible.
- polydimethylsiloxanes can be branched, for example through the incorporation of RSiC> 3 /2 - or SiO 4/2 units up to a maximum of 5% of all units. These branched or partially crosslinked siloxanes then have viscoelastic properties.
- compositions according to the invention contain component (D), the amounts involved are preferably up to 15 percent by weight, preferably up to 5 percent by weight, in particular up to 2 percent by weight, based in each case on the total weight of the defoamer compositions.
- nonionic emulsifiers (E) examples include:
- Alkyl polyglycol ethers preferably those having 4 to 30 EO units and alkyl radicals of 10 to 20 carbon atoms.
- Fatty acid polyglycol esters preferably those with more than 6 EO units and carboxylic acid residues of 8 to 20 carbon atoms.
- Ethoxylated or non-ethoxylated sorbitan fatty acid esters preferably ethoxylated sorbitan fatty acid esters with more than 6 EO units.
- Alkylarylpolyglycolether preferably those with 5 to 30 EO units and 10 to 20 carbon atoms in the alkyl and aryl radicals.
- Ethylene oxide/propylene oxide (EO/PO) block copolymers preferably those with 8 to 30 EO or PO units.
- Preferred non-ionic emulsifiers are
- Carboxylic acid polyglycol esters in particular fatty acid polyglycol esters, preferably those with more than 6 EO units and carboxylic acid residues of 8 to 20 carbon atoms, such as PEG-20 stearate, PEG-20 laurate, PEG-7 olivate, PEG-8 oleate, PEG -8 Laurate HLB PEG-6 stearate, PEG-20 stearate or PEG-100 stearate (according to INCI designation).
- Ethoxylated or non-ethoxylated sorbitan fatty acid esters such as sorbitan laurate, polysorbate 20, polysorbate 60, Polysorbate 80, polysorbate 85 (according to INCI designation), PEG-20 sorbitan cocoate, PEG-40 sorbitan diisostearate, PEG-20 sorbitan isostearate, PEG-40 sorbitan lanolate, PEG-75 sorbitan lanolate, PEG-10 sorbitan laurate, PEG- 40 Sorbitan Laurate, PEG-44 Sorbitan Laurate, PEG-75 Sorbitan Laurate, PEG-80 Sorbitan Laurate, PEG-3 Sorbitan Oleate, PEG-6 Sorbitan Oleate, PEG-80 Sorbitan Palmitate, PEG-40 Sorbitan Perisostearate, PEG-40 Sorbitan Peroleate, PEG-3 Sorbitan Stearate, PEG-6 Sorbitan
- Ethoxylated castor oil or hydrogenated variants such as (designation according to INCI nomenclature) PEG 200 Castor Oil or PEG-60 hydrogenated Castor Oil.
- Polyglycerol carboxylic acid esters such as polyglycerol-10 oleate, polyglycerol-10 laurate or polyglycerol-10 stearate.
- compositions according to the invention contain nonionic emulsifiers (E), the amounts are preferably up to 20% by weight, preferably up to 15% by weight, in particular up to 10% by weight, based on the Total weight of defoamer compositions.
- Mono, di- or trialkoxy-alkyl ethers (F) are glycol ethers, such as ethylene glycol ether, propylene glycol ether or butylene glycol ether.
- Ethylene glycol monophenyl ether 2 -phenoxyethanol, C6H5 -O- CH2CH2 -OH )
- Diethylene glycol monoethyl ether [2-(2-Ethoxyethoxy)ethanol, carbitol cellosolve, CH 3 CH 2 -O-CH 2 CH 2- O-CH 2 CH 2- OH] Diethylene glycol mono-n-butyl ether [2—(2—
- butoxyethoxy )ethanol CH 3 CH 2 CH 2 CH 2 -O-CH 2 CH 2- O-CH 2 CH 2- OH] triethylene glycol mono-n-butyl ether (butyltriglycol) diethylene glycol diethyl ether (diethylcarbitol) dibutylene glycol dibutyl ether (dibutylcarbitol)
- Propylene glycol monomethyl ether (l-methoxy-2-propanol) Propylene glycol monoethyl ether (ethoxypropanol) Propylene glycol mono-n-butyl ether (l-butoxy-2-propanol) Propylene glycol monohexyl ether (l-hexoxy-2-propanol) dipropylene glycol monoethyl ether
- butylene glycol ether examples are
- butylene glycol monomethyl ether (l-methoxy-2-propanol) butylene glycol monobutyl ether (ethoxypropanol)
- Mono, di- or trialkoxy-alkyl ethers are available, for example, under the brand names Dowanol® (from Dow), Arcosolv®
- Preferred examples of mono, di- or trialkoxy-alkyl ethers (F) are ethylene glycol monomethyl ether, ethylene glycol monoethyl ether,
- mono, di- or trialkoxy alkyl ethers are ethylene glycol mono-n-butyl ether, diethylene glycol mono-n-butyl ether, propylene glycol mono-n-butyl ether or dipropylene glycol mono-n-butyl ether.
- compositions according to the invention contain mono, di- or trialkoxy-alkyl ethers (F) preferably in amounts of 5 to 50 percent by weight, preferably 7.5 to 40 percent by weight, in particular 10 to 30 percent by weight, based in each case on the total weight of the defoamer compositions.
- F mono, di- or trialkoxy-alkyl ethers
- the component (G) used is particularly preferably an organic solvent with a boiling point greater than 100° C. at the pressure of the surrounding atmosphere, ie at 900 to 1100 hPa, in particular compounds which cannot be distilled without being decomposed, in particular to those selected from hydrocarbons, native oils, polyisobutylenes, fatty acid esters, fatty alcohols and waxes.
- hydrocarbons examples include isoparaffins (for example available under the trade names Isopar® E, Isopar® G, Isopar® H, Isopar® J, Isopar® L, Isopar® M, Isopar® N, Isopar® P, Isopar® V from ExxonMobil ), dearomatized hydrocarbons (for example available under the trade names Exxsol® D40, Exxsol® 60, Exxsol® D95, Exxsol®
- isobutylenes are products commercially available under the trade name Indopol® (Ineos) or Oppanol®
- Examples of native oils are coconut oil, linseed oil, MCT oil, palm oil, palm kernel oil, rapeseed oil, soybean oil, castor oil or sunflower oil.
- Examples of fatty acid esters are fatty acid methyl ester, fatty acid ethyl ester, fatty acid isopropyl ester,
- Fatty Acid Amyl Esters Fatty Acid Ocyl Esters, Fatty Acid Dodecyl Esters.
- fatty alcohols are hexyl octyl alcohol,
- octyl alcohol decyl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, octyl decyl alcohol, lauryl myrstyl alcohol, lauryl cetyl alcohol and lauryl stearyl alcohol.
- waxes are natural waxes such as animal waxes (wool wax or beeswax), vegetable waxes (sugar cane wax, carnauba wax, candelilla wax, cork wax, cotton wax), mineral/fossil waxes (petroleum wax, peat wax, montan wax, vaseline), semi-synthetic waxes (wax alcohols, such as partially hydrolyzed ester waxes, ester waxes containing emulsifiers, amide waxes based on fatty acids, for example distearylethylenediamide or ethylenedistearamide) or synthetic waxes (polyethylene waxes, polyolefin waxes).
- animal waxes such as animal waxes (wool wax or beeswax)
- vegetable waxes sugar cane wax, carnauba wax, candelilla wax, cork wax, cotton wax
- mineral/fossil waxes mineral/fossil wax
- Component (G) can be used in the defoamer compositions in amounts of preferably 10 to 80 percent by weight, preferably 15 to 70 percent by weight, in particular 20 to 60 percent by weight, based in each case on the total weight of the defoamer compositions.
- alkaline catalysts (H) are alkali metal and alkaline earth metal hydroxides such as NaOH, KOH, CsOH, LiOH and Ca(OH)2.
- acidic catalysts (H) are hydrochloric acid, sulfuric acid and phosphorus nitride chlorides.
- reaction products of (H) with components (A) to (D) are, for example, the product of the silica preferred as filler (B) with alkali metal hydroxides, such as potassium silicate or sodium silicate.
- the catalysts can be metered in typical organic solvents such as alcohols (e.g. methanol, ethanol, isopropanol) or esters (e.g. ethyl acetate).
- alcohols e.g. methanol, ethanol, isopropanol
- esters e.g. ethyl acetate
- compositions according to the invention contain component (H), the amounts are preferably up to 1.0 percent by weight, preferably up to 0.5 percent by weight, in particular up to 0.1 percent by weight, based in each case on the total weight of the defoamer compositions.
- the components (A) to (G) used in the defoamer compositions according to the invention can each be one type of such a component or else a mixture of at least two types of a respective component.
- the antifoam compositions according to the invention preferably contain water in amounts of less than 5% by weight, preferably less than 1% by weight, based in each case on the total weight of the antifoam compositions.
- the defoamer compositions according to the invention preferably contain no added water.
- the antifoam compositions of the invention may also contain additives (I). These are all known additives selected from organic, thickening polymers, preservatives, dyes and fragrances.
- compositions according to the invention are preferably viscous clear to opaque colorless to brownish liquids.
- compositions according to the invention have a viscosity of preferably 1 to 20,000 mPa -s, preferably 5 to 5000 mPa -s, in particular 10 to 2000 mPa -s, measured in each case at 25° C. and a shear rate of 1/s.
- compositions according to the invention can be solutions or dispersions.
- compositions of the invention can by known methods, such as by mixing all Components take place, for example by simple stirring with static mixers or using high shearing forces in colloid mills, dissolvers and rotor-stator homogenizers.
- the defoamer compositions according to the invention can be contained in liquid wetting agents, detergents and cleaning agents.
- compositions according to the invention are preferably mixed with the aqueous media.
- composition according to the invention can be added to the foaming media directly, dissolved in suitable solvents such as toluene, xylene, methyl ethyl ketone or t-butanol, as a powder or as an emulsion.
- suitable solvents such as toluene, xylene, methyl ethyl ketone or t-butanol.
- the amount required to achieve the desired defoaming effect depends, for example, on the type of medium, the temperature and the turbulence that occurs.
- compositions of the present invention are mixed directly with concentrated liquid surfactant formulations, e.g., liquid detergents.
- concentrated liquid surfactant formulations e.g., liquid detergents.
- compositions according to the invention are preferably added to the ready-to-use foaming medium in amounts of 0.1 ppm by weight to 1% by weight, preferably in amounts of 1 to 100 ppm by weight.
- the compositions according to the invention can be present in concentrated surfactant formulations such as liquid detergents in amounts of preferably 0.1 to 20% by weight, preferably 0.5 to 5% by weight.
- the process according to the invention is carried out at temperatures of preferably -10 to +150° C., particularly preferably 5 to 100° C. and the pressure of the surrounding atmosphere, i.e. about 900 to 1100 hPa.
- the process according to the invention can also be carried out at higher or lower pressures, such as at 3000 to 4000 hPa or 1 to 10 hPa.
- Defoamer compositions can be used wherever disruptive foam is to be suppressed. This is the case, for example, in non-aqueous systems such as tar distillation or petroleum processing.
- the use of the antifoam composition is suitable for combating foam in aqueous surfactant systems, for use in detergents and cleaning agents, for combating foam in waste water systems, in textile dyeing processes, in natural gas scrubbing, in polymer dispersions, and for defoaming aqueous media occurring in pulp production .
- the use according to the invention of the defoamer composition takes place in liquid detergents, where the defoamer compositions are distinguished by excellent compatibility and effectiveness.
- defoamer compositions have the advantage that the compositions are easy to handle as defoamers, can be mixed with concentrated surfactant formulations, and that they are distinguished by a high, long-lasting effectiveness in a wide variety of media when small amounts are added. This is extremely advantageous both economically and ecologically.
- the method according to the invention has the advantage that it is easy to carry out and very economical.
- all parts and percentages are by weight unless otherwise specified.
- the following examples are carried out at a pressure of the surrounding atmosphere, i.e. around 1000 hPa, and at room temperature, i.e. around 20° C. or a temperature that occurs when the reactants are combined at room temperature without additional heating or cooling , accomplished.
- Dynamic viscosities were measured on a rheometer "MCR 302" from Anton Paar according to DIN EN ISO 3219: 1994 and DIN 53019, using a cone-plate system (cone CP50-2) with an included angle of 2°
- the device was calibrated with normal oil 10000 from the Physikalisch-Technische Bundesweg.
- the measurement temperature is 25.00° C. +/- 0.05° C., the measurement time is 3 minutes
- the measurement uncertainty of the dynamic viscosity is 1.5%
- the shear rate gradient was selected as a function of the viscosity and is shown separately for each viscosity specification.
- Kinematic viscosities are measured using a ViscoSystem® AVS 350 viscosity measuring system from Schott using Ubbelohde viscometer tubes with a constant (e.g. from Windaus or VWR) in accordance with DIN 51562-Part 1 or ISO/DIS 3105 (including their calibration). definitely. The measurements are carried out at a temperature of 25.0 °C (+- 0.1 °C).
- the viscosity specification (given in mm2/s) represents the arithmetic mean of three independently carried out individual measurements: The measurement uncertainty of the kinematic Viscosity is 1.05%.
- different viscometer tubes with corresponding directional constants are used:
- a silicone resin that is solid at room temperature and consists of the following units (according to 29 Si NMR and IR analysis): 40 mol% CH 3 SiOi /2 -, 50 mol% SiO 4 /2 -, 8 mol% C 2 H 5 0SiO 3/2 - and 2 mol% HOSiC> 3 / 2-, this resin had a weight-average molar mass of 7900 g/mol (based on polystyrene standard), and 0.7 parts of a 20% strength by weight methanolic KOH were mixed with a dissolver and heated to 150° C. for 4 hours. An antifoam agent A with a viscosity of 27,600 mPa -s (measured at 25° C. and a shear rate of 11/s) was obtained.
- defoamer formulation results as an almost clear, homogeneous formulation with a viscosity of 230 mPa -s (measured at 25°C and a shear rate of 11/s). This is characterized by a very good storage stability.
- Defoamer formulation F3 results as an almost clear, homogeneous formulation with a viscosity of 370 mPa -s (measured at 25° C. and a shear rate of 11/s). This is characterized by a very good storage stability.
- Defoamer formulation EM results as an almost clear, homogeneous formulation with a viscosity of 340 mPa -s (measured at 25°C and a shear rate of 11/s). This is characterized by a very good storage stability.
- Defoamer formulation F5 results as a slightly cloudy, homogeneous formulation with a viscosity of 580 mPa ⁇ s (measured at 25° C. and a shear rate of 11/s). This is characterized by a very good storage stability.
- defoamer formulation F1 is repeated, with a large part of the hydrocarbon mixture having a boiling range of 235-270° C. (38.5 percent by weight) and the diethylene glycol monopropyl ether being replaced by 2,2,4-trimethyl-1,3-diisobutyryloxypentane (55 0 parts by weight) (as described in US 4477371 A).
- Defoamer formulation VF6 results as a cloudy, homogeneous formulation with a viscosity of 340 mPa -s (measured at 25°C and a shear rate of 11/s).
- defoamer formulation F5 The preparation of defoamer formulation F5 is repeated, the hydrocarbon mixture having a boiling range of 235-270 ° C and the
- diethylene glycol monobutyl ether is replaced by 2,2,4-trimethyl-1,3-diisobutyryloxypentane (55.0 parts by weight) (as described in US 4477371 A).
- Defoamer formulation VF7 results as a cloudy, homogeneous formulation with a viscosity of 90 mPa's (measured at 25° C. and a shear rate of 11/s).
- antifoam formulation E7L is repeated, using instead of antifoam agent A a Aminoethylaminopropyl-functionalized polydimethylsiloxane with a viscosity of 893 mPa -s (measured at 25° C. and a shear rate of 11/s) and Timin number of 0.29 megu./g is used.
- a (comparative) defoamer formulation VF8 results as a clear, homogeneous formulation.
- antifoam formulation F1 is repeated, using an n-dodecyl-functionalized polymethylsiloxane having a viscosity of 1130 mPa -s (measured at 25° C. and a shear rate of 11/s) instead of the antifoam agent A.
- a stable formulation cannot be made.
- defoamer formulation F1 is repeated, using instead of antifoam A a polyether-functionalized polydimethylsiloxane with polyethylene oxide-polypropylene oxide side chains having a viscosity of 630 mPa -s (measured at 25° C. and a shear rate of 11/s).
- a (comparative) defoamer formulation VF10 results as a cloudy, homogeneous formulation.
- Example 3 Compatibility of the antifoam formulations in a commercial liquid detergent
- defoamer formulation F5 which contains diethylene glycol monobutyl ether
- anionic surfactant solution results in a significantly more effective foam breakdown than is the case with the (comparative) defoamer formulation VF7.
- Example 5 Defoamer effectiveness tests when used in the washing machine
- the washing program is then started.
- the program runs at a temperature of 40°C and a water hardness of 3°GH.
- the foam height is recorded over a period of 89 minutes.
- the average foam grade is determined from the foam grades determined over the entire period (0% no foam measurable to 100% foaming over). The lower this is, the more effective the defoamer formulation is over the entire period. The results are summarized in Table 3.
- the foam development can be controlled very effectively even after storage in the detergent formulation in the washing machine.
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Abstract
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Claims
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2021/069972 WO2023284979A1 (de) | 2021-07-16 | 2021-07-16 | Entschäumerzusammensetzungen mit polydimethylsiloxane, organopolysiloxanharze, alkylether und ohne 2,2,4-trimethyl-1,3-diisobutyryloxypentan |
| KR1020247003349A KR20240027773A (ko) | 2021-07-16 | 2021-07-16 | 폴리디메틸실록산, 오가노폴리실록산 수지, 알킬 에테르를 포함하고 2,2,4-트리메틸-1,3-디이소부티릴옥시펜탄을 포함하지 않는 소포 조성물 |
| CN202180100619.8A CN117715687A (zh) | 2021-07-16 | 2021-07-16 | 具有聚二甲基硅氧烷、有机聚硅氧烷树脂、烷基醚并且没有2,2,4-三甲基-1,3-二异丁酰氧基戊烷的消泡组合物 |
| US18/578,733 US20240335768A1 (en) | 2021-07-16 | 2021-07-16 | Defoaming compositions with polydimethylsiloxanes, organopolysiloxane resins, alkyl ethers and without 2,2,4-trimethyl-1,3-diisobutyryloxypentane |
| EP21751990.9A EP4370229A1 (de) | 2021-07-16 | 2021-07-16 | Entschäumerzusammensetzungen mit polydimethylsiloxane, organopolysiloxanharze, alkylether und ohne 2,2,4-trimethyl-1,3-diisobutyryloxypentan |
| JP2024502058A JP2024524700A (ja) | 2021-07-16 | 2021-07-16 | ポリジメチルシロキサン、オルガノポリシロキサン樹脂、アルキルエーテルを含み、2,2,4-トリメチル-1,3-ジイソブチリルオキシペンタンを含まない消泡組成物 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2021/069972 WO2023284979A1 (de) | 2021-07-16 | 2021-07-16 | Entschäumerzusammensetzungen mit polydimethylsiloxane, organopolysiloxanharze, alkylether und ohne 2,2,4-trimethyl-1,3-diisobutyryloxypentan |
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| WO2023284979A1 true WO2023284979A1 (de) | 2023-01-19 |
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| PCT/EP2021/069972 Ceased WO2023284979A1 (de) | 2021-07-16 | 2021-07-16 | Entschäumerzusammensetzungen mit polydimethylsiloxane, organopolysiloxanharze, alkylether und ohne 2,2,4-trimethyl-1,3-diisobutyryloxypentan |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20240335768A1 (de) |
| EP (1) | EP4370229A1 (de) |
| JP (1) | JP2024524700A (de) |
| KR (1) | KR20240027773A (de) |
| CN (1) | CN117715687A (de) |
| WO (1) | WO2023284979A1 (de) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1519987A1 (de) | 1963-05-06 | 1970-04-09 | Dow Corning | Stabile Schaumregulierungsmittel |
| DE2107082A1 (de) | 1970-02-16 | 1971-08-26 | Ici Ltd | Oberflachenbehandeltes pulverformiges Siliciumdioxid und Verfahren zur Herstel lung desselben |
| DE3235256A1 (de) | 1982-09-23 | 1984-03-29 | Wacker Chemie Gmbh | In wasser leicht verteilbare antischaummittel |
| US4919843A (en) * | 1987-07-30 | 1990-04-24 | Wacker-Chemie Gmbh | Antifoam compositions |
| WO2019057754A1 (de) | 2017-09-25 | 2019-03-28 | Evonik Degussa Gmbh | Lagerstabile konzentrate enthaltend polysiloxane und deren einsatz vorzugsweise in textil-pflegenden zusammensetzungen |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO891598L (no) * | 1988-05-09 | 1989-11-10 | Dow Corning | Silikon-skumkontrollsammensetning. |
| US4978471A (en) * | 1988-08-04 | 1990-12-18 | Dow Corning Corporation | Dispersible silicone wash and rinse cycle antifoam formulations |
| DE102007047211A1 (de) * | 2007-10-02 | 2009-04-09 | Wacker Chemie Ag | Entschäumerzusammensetzungen |
| DE102010028306A1 (de) * | 2010-04-28 | 2011-11-03 | Wacker Chemie Ag | Entschäumerzusammensetzungen |
| DE102016203346A1 (de) * | 2016-03-01 | 2017-09-07 | Wacker Chemie Ag | Entschäumerzusammensetzungen für Waschmittel |
| EP3744761B1 (de) * | 2019-05-28 | 2021-06-30 | Evonik Operations GmbH | Sioc basierte polyethersiloxane |
| WO2021090803A1 (ja) * | 2019-11-06 | 2021-05-14 | ダウ・東レ株式会社 | 水可溶性シリコーン消泡剤組成物およびそれを含む水系塗料 |
-
2021
- 2021-07-16 US US18/578,733 patent/US20240335768A1/en active Pending
- 2021-07-16 WO PCT/EP2021/069972 patent/WO2023284979A1/de not_active Ceased
- 2021-07-16 EP EP21751990.9A patent/EP4370229A1/de active Pending
- 2021-07-16 CN CN202180100619.8A patent/CN117715687A/zh active Pending
- 2021-07-16 KR KR1020247003349A patent/KR20240027773A/ko active Pending
- 2021-07-16 JP JP2024502058A patent/JP2024524700A/ja active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1519987A1 (de) | 1963-05-06 | 1970-04-09 | Dow Corning | Stabile Schaumregulierungsmittel |
| DE2107082A1 (de) | 1970-02-16 | 1971-08-26 | Ici Ltd | Oberflachenbehandeltes pulverformiges Siliciumdioxid und Verfahren zur Herstel lung desselben |
| DE3235256A1 (de) | 1982-09-23 | 1984-03-29 | Wacker Chemie Gmbh | In wasser leicht verteilbare antischaummittel |
| US4477371A (en) | 1982-09-23 | 1984-10-16 | Wacker-Chemie Gmbh | Aqueous dispersible defoamers |
| US4919843A (en) * | 1987-07-30 | 1990-04-24 | Wacker-Chemie Gmbh | Antifoam compositions |
| WO2019057754A1 (de) | 2017-09-25 | 2019-03-28 | Evonik Degussa Gmbh | Lagerstabile konzentrate enthaltend polysiloxane und deren einsatz vorzugsweise in textil-pflegenden zusammensetzungen |
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| Publication number | Publication date |
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| US20240335768A1 (en) | 2024-10-10 |
| CN117715687A (zh) | 2024-03-15 |
| JP2024524700A (ja) | 2024-07-05 |
| EP4370229A1 (de) | 2024-05-22 |
| KR20240027773A (ko) | 2024-03-04 |
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