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WO2011069868A2 - Compositions antimousse - Google Patents
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WO2011069868A2 - Compositions antimousse - Google Patents

Compositions antimousse Download PDF

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Publication number
WO2011069868A2
WO2011069868A2 PCT/EP2010/068638 EP2010068638W WO2011069868A2 WO 2011069868 A2 WO2011069868 A2 WO 2011069868A2 EP 2010068638 W EP2010068638 W EP 2010068638W WO 2011069868 A2 WO2011069868 A2 WO 2011069868A2
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WO
WIPO (PCT)
Prior art keywords
units
formula
radical
organopolysiloxane
sum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2010/068638
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German (de)
English (en)
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WO2011069868A3 (fr
Inventor
Willibald Burger
Holger Rautschek
Josef Wimmer
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Wacker Chemie AG
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Wacker Chemie AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Publication of WO2011069868A2 publication Critical patent/WO2011069868A2/fr
Publication of WO2011069868A3 publication Critical patent/WO2011069868A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/0005—Other compounding ingredients characterised by their effect
    • C11D3/0026—Low foaming or foam regulating compositions
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/28—Prevention of foam
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/06—Paper forming aids
    • D21H21/12—Defoamers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes

Definitions

  • the invention relates to compositions which
  • Organosilicon compounds having different viscosities having different viscosities, processes for their preparation and their use as defoamers.
  • liquid especially aqueous systems which contain surface-active compounds as desired or unwanted constituents, can be formed by foaming
  • Defoamers based on siloxanes have proven particularly useful. Defoamers based on siloxanes are prepared, for example, according to US Pat. No. 3,383,327 A by heating hydrophilic silica in polydimethylsiloxanes. By application of basic
  • Catalysts can improve the effectiveness of such defoamers, such as disclosed in US 3,560,401A.
  • Silica in a polydimethylsiloxane e.g. B. according to DE 29 25 722 AI.
  • an antifoam preparation which, in addition to a polydiorganosiloxane and silica, also contains a copolymer of (CH 3 ) 3 SiO 2/2 and SiO 2 building blocks.
  • Copolymers of (CH 3 ) 3 SiO 2/2 and SiO 2 building blocks should also be advantageous in combination with siloxanes which carry terminal long alkyl groups, such as in EP-A 301,531
  • linear highly viscous polydimethylsiloxanes are also used in antifoam formulations.
  • EP-B 163 398 oils are up to a viscosity of up to 200000 mm 2 / s to improve the defoamer in
  • CN 1583212 describes antifoam agents, wherein the polydimethylsiloxane used has a viscosity of more than 100,000 mm 2 / s, which is complicated in the further processing.
  • EP-B 270 898 teaches the use of polydimethylsiloxanes having a viscosity of more than 15 kPa's as defoamers in acidic media. In order to be able to distribute this extremely viscous polymer in aqueous media, it must be in one
  • Silicone resin are mixed.
  • compositions comprising (A) at least one organosilicon compound of units of the formula
  • R may be the same or different and one
  • Hydrocarbon radical having 1 to 30 carbon atoms, R 1 may be the same or different and a
  • a 1, 2 or 3
  • b 0 or 1
  • Organosilicon compound at 25 ° C and 101.425 kPa has a viscosity of 0.00001 m 2 / s to 0.01 m 2 / s.
  • d 0 or 1
  • Viscosity of at least I m 2 / s has.
  • R 2 may be the same or different and is a hydrogen atom or a monovalent, optionally substituted, SiC-bonded hydrocarbon radical having 1 to 30
  • Carbon atoms means R 3 may be the same or different and is a hydrogen atom or a monovalent, optionally substituted hydrocarbon radical having 1 to 4 carbon atoms, e is 0, 1, 2 or 3 and
  • f 0, 1, 2 or 3
  • radicals R are alkyl radicals, such as the methyl, ethyl, n-propyl, n-butyl, i-butyl, n-pentyl, cyclopentyl, n-hexyl radical, n-heptyl radical, n- Octyl radical, i-octyl radical, n-nonyl radical, n-decyl radical, n-dodecyl radical and n-octadecyl radical.
  • substituted radicals R are 3, 3, 3-trifluoro-n-propyl radical, cyanoethyl, glycidoxypropyl, polyalkylene glycol propyl, aminopropyl, aminoethylaminopropyl, methacryloxypropyl radicals.
  • the radical R is an optionally substituted hydrocarbon radical having 1 to 18 carbon atoms, preferably a linear alkyl radical having 1 to 18 carbon atoms,
  • n-hexyl particularly preferably a methyl, n-hexyl, n-heptyl, n-octyl and n-dodecyl radical, in particular a methyl radical.
  • radical R 1 are hydrogen atom and alkyl radicals, such as the methyl, ethyl, n-propyl, iso-propyl and n-butyl radicals.
  • the radical R 1 is a hydrogen atom or a methyl or ethyl radicals.
  • B is preferably 0 or 1, more preferably 0.
  • d is 0 or 1, more preferably 0.
  • the organosilicon used as component (A) is the organosilicon used as component (A)
  • Compounds of units of the formula (I) are preferably linear organopolysiloxanes.
  • organopolysiloxanes is intended to encompass both polymeric, oligomeric and dimeric siloxanes.
  • the component (A) used according to the invention is preferably essentially linear organopolysiloxanes of the formula R 3 Si (O-SiR 2 ) n O-SiR 3 (IV), where the radical R has the meaning given above and Index n, which determines the degree of polymerization of the polysiloxane (IV) and thus the viscosity, preferably an integer of 5 to 500, preferably 100 to 300, is.
  • radicals R in each case based on the sum of the radicals R in formula (IV), have the meaning of hydrogen atom.
  • the component (B) used according to the invention is preferably essentially linear organopolysiloxane of the formula R 3 Si (O-SiR 2 ) m O-SiR 3 (V), where the radical R has the meaning given above and the index m, which determines the degree of polymerization of the polysiloxane (V) and thus the viscosity, preferably a integer greater than 1500, preferably greater than 2000.
  • m is at most 10,000, preferably at most 5000
  • Organopolysiloxanes up to 1 mol%, but preferably less than 0.02 mol% based on the sum of all siloxane units, other siloxane units, such as sSi0 1/2 -, -Si0 3/2 - and Si0 4/2 - units containing.
  • radicals R Preferably, less than 5 mol%, in particular less than 1 mol%, of the radicals R, in each case based on the sum of the radicals R in formula (V), have the meaning of hydrogenatora.
  • organosilicon compounds (A) and (B) can be prepared by any desired methods known to date in organosilicon chemistry of the polymerization of cyclic siloxanes or polycondensation of silanol-terminated oligomers.
  • the weight ratio of component (A) to component (B) is preferably 100: 10 to 100: 0.1, in particular 100: 5 to 100: 1,
  • 101.325 kPa is preferably less than 100000 mm 2 / s, preferably less than 50 000 mm 2 / s, more preferably less than 20 000 mm 2 / s, which is for further processability
  • compositions according to the invention comprise additive (C) in amounts of preferably 0.1 to 30 parts by weight, preferably 1 to 15 parts by weight, based in each case on 100 parts by weight of component (A) and (B).
  • the additive (C) used according to the invention may be exclusively component (C1), exclusively component (C2) or a mixture of components (C1) and (C2), the latter being preferred.
  • the component (Cl) is preferably
  • Component (Cl) 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.
  • Examples of the component (Cl) are silica
  • Ethylenebisstearamide finely divided hydrophobic polyurethanes.
  • titanium acids titanium dioxide or alumina with a BET surface area of 20 to 1000 m 2 / g, a particle size of less than 10 ⁇ and an agglomerate size of less than 100 ⁇ used.
  • component (Cl) are silicic acids, in particular those having a BET surface area of 50 to
  • silicas may be fumed or precipitated silicas. They are as component (Cl) both
  • pretreated silicas used ie commercially available hydrophobic silicas, as well as hydrophilic silicas.
  • the degree of hydrophobization is determined by the number of methanol
  • hydrophobic silicic acids are preferably silicic acids having a methanol number of more than 30
  • hydrophobic silicas which can be used according to the invention are HDK® H2000, a fumed silica treated with hexamethyldisilazanes having a BET surface area of 140 m 2 / g (commercially available from Wacker-Chemie GmbH, Germany) and a precipitated with
  • hydrophobic silicas are to be used as component (Cl)
  • hydrophilic silicas can also be rendered hydrophobic in situ if this is advantageous for the desired activity of the defoamer formulation.
  • Hydrophobization of silicas are widely known.
  • the in situ hydrophobing of the hydrophilic silica can be z. B. by heating for several hours in the component (A) or in a mixture of (A) and (B) dispersed
  • Silica to temperatures of 100 to 200 ° C take place.
  • the reaction may be assisted by the addition of catalysts, such as KOH, and hydrophobing agents, such as short-chain OH-terminated polydimethylsiloxanes, silanes or silazanes.
  • catalysts such as KOH
  • hydrophobing agents such as short-chain OH-terminated polydimethylsiloxanes, silanes or silazanes.
  • hydrophobic silicic acids possible and can contribute to the improvement in efficacy.
  • radicals R 2 are the radicals indicated for radicals R.
  • the radical R 2 is preferably an optionally substituted hydrocarbon radical having 1 to 18 carbon atoms, preferably a hydrocarbon radical having 1 to 6 carbon atoms, particularly preferably a methyl radical.
  • radical R 3 are the radicals indicated for the radical R 1 .
  • the radical R 3 is a hydrogen atom or a
  • the value of e is 3 or 0.
  • the optionally used component (C2) according to the invention are preferably silicone resins of units of the formula (II) in which less than 30%, preferably less than 5% of the units in the resin have the sum e + f equal to 2 , More preferably, component (C2) is um
  • Organopolysiloxane resins consisting essentially of R 2 3 SiOi / 2 (M) and Si0 4/2 (Q) units with R 2 have the abovementioned meaning; these resins are also referred to as MQ resins.
  • the molar ratio of M to Q units is preferably in the range of 0.5 to 2.0, more preferably in the range of 0.6 to 1.0.
  • M and Q units of the MQ resins may optionally contain small amounts of RSi0 3/2 (T) units or R 4 2 Si0 2/2 (D) units, in amounts of 0.01 to 20 mol %, but preferably less than 5 mol% based on Si atoms, wherein R 4 is a radical R 2 or a radical -OR 3 , and R 2 and R 3 have the meaning given above.
  • These silicone resins may also contain up to 10% by weight of Si-bonded hydroxy or alkoxy groups -OR 3 .
  • these Organopolysiloxanharze (C2) at 25 ° C have a viscosity greater than 1000 mPas or are solids. The weight average determined by gel permeation chromatography
  • Molecular weight (based on a polystyrene standard) of these resins is preferably 200 to 200,000 g / mol, in particular 1,000 to 20,000 g / mol.
  • Component (C2) are commercially available products or can be prepared by methods common in silicon chemistry, for. For example, "Parsonage, J.R. Kendrick, D.A. (Science of Materials and Polymers Group, University of Greenwich, London, ÜK SE18 6PF) Spec. Publ. - R. Soc. Chem. 166, 98-106, 1995 ", US-A 2,676,182 or EP-A 927,733.
  • the additive (C) used according to the invention is a mixture of components (Cl) and (C2)
  • the weight ratio of (Cl) to (C2) in the mixture is preferably 0.01 to 50, particularly preferably 0 , 1 to 7.
  • compositions according to the invention contain all other substances, as they have also been used in defoamer formulations, such as.
  • D water-insoluble organic compounds
  • a solubility in water at 25 ° C and a pressure of 101.325 kPa of at most 3 percent by weight are understood.
  • the optionally used component (D) are preferably water-insoluble organic compounds having a boiling point greater than 100 ° C at the pressure of the surrounding atmosphere, ie at 900 to 1100 hPa, in particular those selected from mineral oils, native oils,
  • Oxo-alcohol synthesis esters of low molecular weight synthetic carboxylic acids, fatty acid esters, e.g. Octyl stearate,
  • Alcohols, phthalates, esters of phosphoric acid and waxes are examples of alcohols, phthalates, esters of phosphoric acid and waxes.
  • compositions according to the invention contain
  • water-insoluble organic compound (D) in amounts of preferably 0 to 1000 parts by weight, more preferably 0 to 100 parts by weight, based in each case on 100 parts by weight of the total weight of components (A), (B) and (C).
  • the components used in the process according to the invention may each be a type of such a component as well as a mixture of at least two types of a respective component.
  • compositions according to the invention are those containing (A) 100 parts by weight of an organosilicon compound of the formula (IV),
  • compositions of the invention are preferably viscous clear to opaque colorless liquids.
  • Optionally modified polysiloxanes which may be linear or branched and carry at least one polyether moiety, may be added in amounts of preferably from 1 to 500 parts by weight per 100 parts by weight of components A to D, preferably in amounts of from 2 to 3, as further components for the preparation of the defoamer formulations according to the invention 200 parts by weight per 100 parts by weight of components A to D, more preferably in amounts of 3 to 100
  • compositions according to the invention have a viscosity of preferably 100 to 2,000,000 mPas, more preferably of 10,000 to 80,000 mPas each at 25 ° C and 101,325 kPa. Preference is given to formulations in which the in the
  • compositions according to the invention may be solutions, dispersions or powders.
  • compositions of the invention can be prepared by known methods, such. B. by mixing all
  • Components are made, such. B. using high
  • the mixing process can be carried out at reduced pressure to the mixing of air, which z. B. is contained in highly dispersed fillers to prevent. Subsequently, if necessary, the in situ hydrophobing of the
  • Components (A) and (B) mixed, then components (C) is added and then the mixture is baked and homogenized.
  • the invention furthermore relates to emulsions containing compositions according to the invention,
  • compositions according to the invention are emulsions, it is possible to use all emulsifiers which are known to the person skilled in the art for the preparation of silicone emulsions, such as, for example, As anionic, cationic or nonionic
  • Emulsifiers Emulsifier mixtures are preferably used, wherein at least one nonionic emulsifier, such as. B.
  • Sorbitan fatty acid esters ethoxylated sorbitan fatty acid esters, ethoxylated fatty acids, ethoxylated linear or branched alcohols having 10 to 20 carbon atoms and / or glycerol esters, should be included.
  • thickeners compounds such as polyacrylic acid, polyacrylates, cellulose ethers such as carboxymethyl cellulose and hydroxyethyl cellulose,
  • Polyurethanes natural thickeners, such as. As xanthan gum, as well as preservatives and other conventional additives known in the art are added.
  • the continuous phase of the emulsions according to the invention is preferably water. However, it can also according to the invention
  • compositions are prepared in the form of emulsions in which the continuous phase is formed by the components (A), (B) and (C) or formed by component (D). It can also be multiple emulsions. Processes for the preparation of silicone emulsions are known.
  • the preparation is usually carried out by simple stirring of all constituents and optionally subsequent homogenization with jet dispersers, rotor-stator homogenizers,
  • Colloid mills or high-pressure homogenizers Colloid mills or high-pressure homogenizers.
  • composition according to the invention is emulsions
  • oil in water are emulsions containing 5 to 50% by weight of components (A) to (D), 1 to 20% by weight.
  • compositions of the invention may also be formulated as free-flowing powders. These are z. B. preferred when used in powdered detergents.
  • Components (A), (B), (C) and optionally (D) is carried out by methods known in the art, such as spray drying or
  • the invention further powder containing Compositions according to the invention and
  • the powders according to the invention preferably contain 2 to 20% by weight of the composition according to the invention comprising the components (A) to (D).
  • a carrier come z.
  • As zeolites, sodium sulfate, cellulose derivatives, urea and sugar are used.
  • the powders according to the invention contain from 50 to 95% by weight of carrier materials.
  • Other components of the powder according to the invention can, for. As waxes or organic polymers, as z. As described in EP-A 887097 and EP-A 1060778.
  • Another object of the present invention are detergents and cleaning compositions containing the inventive
  • compositions or compositions of the invention in the form of emulsions or in the form of powders.
  • compositions according to the invention can be used everywhere
  • Organosilicon compounds have also been used.
  • Another object of the present invention is a method for defoaming and / or to prevent the
  • compositions or their emulsions or powders are mixed with the media.
  • Solvents such as toluene, xylene, methyl ethyl ketone or t-butanol, dissolved, as a powder or as an emulsion.
  • Achieving the desired defoamer effect necessary amount depends z. For example, the type of medium, the temperature and the turbulence occurring.
  • compositions according to the invention are preferably added in amounts of from 0.1 ppm by weight to 1% by weight, in particular in amounts of from 1 to 100 ppm by weight, to the foaming medium.
  • the inventive method is at temperatures of preferably -10 to + 150 ° C, more preferably 5 to 100 ° C, and the pressure of the surrounding atmosphere, that is about 900 to
  • 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.
  • the antifoam compositions according to the invention can be used wherever disturbing foam is to be suppressed. This is z. As in non-aqueous media, such as tar distillation or petroleum processing of the case.
  • Defoamer compositions for controlling foam in aqueous media such as aqueous surfactant systems, the use in detergents and cleaners, the control of foam in wastewater systems, textile dyeing processes, in the
  • compositions of the invention have the advantage that they are easy to handle as defoamers, and that they are characterized by a high, long-lasting efficacy in different media at low additional quantities. This is extremely beneficial both economically and ecologically.
  • the process according to the invention has the advantage that it is simple to carry out and very economical.
  • the defoamer (10 mg based on the components (A), (B) and (C) in the defoamer formulation) is metered in,
  • the long-term effect of the defoamer is determined, which represents the time t2 required to reach from the lowest foam level to the original foam level
  • A3 A trimethylsiloxane-terminated
  • VA4 condensation product with a
  • VBl (not according to the invention): A trimethylsiloxane-terminated polydimethylsiloxane having a viscosity of 0.2 m 2 / s.
  • Cll A hydrophilic fumed silica having a BET surface area of 300 m 2 / g (available from Wacker Chemie AG, Germany under the name HDK® T30)
  • Additive Hl a hydrocarbon mixture with a boiling range of 235-270 ° C.
  • the substances described in Table 1 are mixed with a dissolver and heated in the presence of 1500 ppm KOH (as a 20% solution in methanol) for 4 hours at 150 ° C and homogenized after cooling again with the dissolver.
  • the viscosity was measured with an MCR 301 rheometer from Anton Paar at 25 ° C. in the oscillating mode. The viscosity and the loss factor are given at an amplitude of 1% and a frequency of 1 Hz.
  • compositions thus obtained were now tested for the anti-foam coefficient ⁇ KZ and the test in the black liquor.
  • the results of these tests are summarized in Table 2.
  • inventive examples not only have a shorter foam disintegration time and a lower foam height but also a much better long-term effect than the formulations prepared according to the prior art.
  • Defoamer formulations VI and Inventive Example 1 were emulsified as follows and tested as emulsions on black liquor. There were 100 parts of a defoamer at 60 ° C with 15 parts of sorbitan monstearate (available under the name "Span 60" at Croda GmbH Nettetal) and 10 parts
  • Black liquor has an excellent effect, and they also act as very good defoamers in many other aqueous foaming formulations, such as agrochemical or detergent formulations or in aqueous polymer dispersions.
  • a white, free-flowing powder was obtained. This has been successfully used to prevent foam in powder form

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Toxicology (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Degasification And Air Bubble Elimination (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne de nouvelles compositions contenant (A) au moins un composé organosilicium composé d'unités de formule Ra (R1O) bSiO(4-a-b)/2 (I) dans laquelle R peut représenter deux éléments et être un atome d'hydrogène ou un reste hydrocarbure aliphatique monovalent, éventuellement substitué, lié à SiC, portant 1 à 30 atomes de C, R1 peut représenter deux éléments et être un atome d'hydrogène ou un reste hydrocarbure monovalent, éventuellement substitué, portant 1 à 4 atomes de C, a est 1, 2 ou 3 et b est 0 ou 1, à la condition que la somme a + b < 3, et que le composé organosilicium présente une viscosité de 0,00001 m2/s à 0,01 m2/s à 25°C et 101,425 kPa; (B) au moins un composé organosilicium composé d'unités de formule Rc (R1O) dSiO(4-a-b)/2 (II) dans laquelle R et R1 ont la signification donnée plus haut, c est 1, 2 ou 3 et d est 0 ou 1, à la condition que la somme c + d < 3, et que le composé organosilicium présente une viscosité d'au moins 1 m2/s à 25°C et 101,425 kPa; et (C) au moins un additif choisi parmi (C1) des particules de charge et/ou (C2) une résine organopolysiloxane composée d'unités de formule R2 e (R3O) fSiO(4-e-f)/2 (III) dans laquelle R2 a la signification de R, R3 a la signification de R1, e est 0, 1, 2 ou 3, et f est 0, 1, 2 ou 3, à la condition que la somme e + f < 3 et que dans moins de 50 % de toutes les unités de formule (III), la somme e + f = 2 dans la résine organopolysiloxane.
PCT/EP2010/068638 2009-12-08 2010-12-01 Compositions antimousse Ceased WO2011069868A2 (fr)

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Application Number Priority Date Filing Date Title
DE200910047638 DE102009047638A1 (de) 2009-12-08 2009-12-08 Entschäumerzusammensetzungen
DEDE102009047638.5 2009-12-08

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WO2011069868A3 WO2011069868A3 (fr) 2011-08-18

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018224131A1 (fr) 2017-06-06 2018-12-13 Wacker Chemie Ag Formulations anti-mousse contenant des organopolysiloxanes
WO2020108751A1 (fr) 2018-11-28 2020-06-04 Wacker Chemie Ag Formulations antimousses contenant des organopolysiloxanes
WO2020108752A1 (fr) 2018-11-28 2020-06-04 Wacker Chemie Ag Formulations antimousses contenant des organopolysiloxanes
WO2020108750A1 (fr) 2018-11-28 2020-06-04 Wacker Chemie Ag Formulations antimousses contenant des organopolysiloxanes

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WO2018224131A1 (fr) 2017-06-06 2018-12-13 Wacker Chemie Ag Formulations anti-mousse contenant des organopolysiloxanes
US10870071B2 (en) 2017-06-06 2020-12-22 Wacker Chemie Ag Defoaming formulations containing organopolysiloxanes
WO2020108751A1 (fr) 2018-11-28 2020-06-04 Wacker Chemie Ag Formulations antimousses contenant des organopolysiloxanes
WO2020108752A1 (fr) 2018-11-28 2020-06-04 Wacker Chemie Ag Formulations antimousses contenant des organopolysiloxanes
WO2020108750A1 (fr) 2018-11-28 2020-06-04 Wacker Chemie Ag Formulations antimousses contenant des organopolysiloxanes
US11925883B2 (en) 2018-11-28 2024-03-12 Wacker Chemie Ag Defoaming formulations containing organopolysiloxanes
US11931673B2 (en) 2018-11-28 2024-03-19 Wacker Chemie Ag Defoaming formulations containing organopolysiloxanes
US12064711B2 (en) 2018-11-28 2024-08-20 Wacker Chemie Ag Defoaming formulations containing organopolysiloxanes

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