WO2016158177A1 - Agent antimoussant, composition de résine hydrosoluble contenant ledit agent et résine hydrosoluble contenant ledit agent - Google Patents

Agent antimoussant, composition de résine hydrosoluble contenant ledit agent et résine hydrosoluble contenant ledit agent Download PDF

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Publication number
WO2016158177A1
WO2016158177A1 PCT/JP2016/056446 JP2016056446W WO2016158177A1 WO 2016158177 A1 WO2016158177 A1 WO 2016158177A1 JP 2016056446 W JP2016056446 W JP 2016056446W WO 2016158177 A1 WO2016158177 A1 WO 2016158177A1
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Prior art keywords
water
polyether compound
soluble resin
metal oxide
weight
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PCT/JP2016/056446
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English (en)
Japanese (ja)
Inventor
松村陽平
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サンノプコ株式会社
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Priority to CN201680003785.5A priority Critical patent/CN106999804B/zh
Priority to JP2017509431A priority patent/JP6700517B2/ja
Publication of WO2016158177A1 publication Critical patent/WO2016158177A1/fr

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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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • C08L101/12—Compositions of unspecified macromolecular compounds characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity
    • C08L101/14—Compositions of unspecified macromolecular compounds characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity the macromolecular compounds being water soluble or water swellable, e.g. aqueous gels
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
    • C08L71/02—Polyalkylene oxides
    • 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

Definitions

  • the present invention relates to an antifoaming agent, a water-soluble resin composition containing the same, and a water-soluble resin aqueous solution.
  • One or more antifoaming agents selected from fatty acid ester compounds, ether compounds, metal soap compounds, or silicon compounds are known (claim 2 of Patent Document 1).
  • An object of the present invention is to provide an antifoaming agent that does not deteriorate transparency even when applied to a water-soluble resin and is excellent in antifoaming properties.
  • the antifoaming agent of the present invention is characterized in that a metal compound fine particle selected from a polyether compound (A) having a cloud point of 20 to 60 ° C. in a 1% by weight ion exchange aqueous solution, and fumed metal oxide and colloidal metal oxide.
  • A polyether compound having a cloud point of 20 to 60 ° C. in a 1% by weight ion exchange aqueous solution, and fumed metal oxide and colloidal metal oxide.
  • B based on the weight of the polyether compound (A) and the metal oxide fine particles (B), the content of the polyether compound (A) is 80 to 99.9% by weight, and the metal oxide fine particles The point is that the content of (B) is 0.1 to 20% by weight.
  • the antifoaming agent of the present invention is characterized by fine metal oxide particles selected from a polyether compound (A) having a cloud point of 20 to 60 ° C. in a 1% by weight ion exchange aqueous solution, a fumed metal oxide, and a colloidal metal oxide. (B) and water (C), and based on the weight of the polyether compound (A) and the metal oxide fine particles (B), the content of the polyether compound (A) is 80 to 99.9% by weight.
  • the gist is that the content of the metal oxide fine particles (B) is 0.1 to 20% by weight and the content of water (C) is 1 to 10% by weight.
  • the feature of the water-soluble resin composition of the present invention is that it contains a water-soluble resin and the antifoaming agent.
  • the feature of the water-soluble resin aqueous solution of the present invention is that it contains a water-soluble resin, the antifoaming agent and water.
  • the antifoaming agent of the present invention does not decrease transparency even when applied to a water-soluble resin, and exhibits excellent defoaming properties.
  • the aqueous solution obtained by dissolving the water-soluble resin composition in water is excellent in antifoaming properties, and the aqueous solution is also excellent in transparency.
  • the water-soluble resin aqueous solution of the present invention contains the above antifoaming agent, it is excellent in transparency and antifoaming property.
  • polyether compound (A) a compound having a plurality of ether bonds in the molecule, which is liquid at 25 ° C. can be used, and a polyoxyalkylene compound is preferably exemplified.
  • the cloud point (° C.) of the polyether compound (A) in a 1% by weight ion exchange aqueous solution is preferably 20 to 60, more preferably 22 to 59, particularly preferably 24 to 58, and most preferably 25 to 57. . Within this range, the antifoaming property is further improved, and even when applied to a water-soluble resin, its transparency is not lowered.
  • the cloud point in a 1% by weight ion exchange aqueous solution is one of the physical property values as a measure of hydrophilicity. The higher the cloud point, the greater the hydrophilicity, and the value measured as follows. is there.
  • the polyether compound (A) includes a polymer having an oxyalkylene group having 2 to 18 carbon atoms as a unit, and the polyether compound (A1) represented by the general formula (1) and the general formula (2)
  • at least one selected from the group consisting of polyether compounds (A5) can be exemplified.
  • R 1 is a reaction residue of an active hydrogen compound having 1 to 25 carbon atoms
  • R 2 and R 3 are monovalent organic groups having 1 to 24 carbon atoms
  • R 4 is a divalent organic group having 1 to 24 carbon atoms
  • R 5 is a hydroxyl group or a monovalent organic group having 1 to 24 carbon atoms
  • AO and OA are oxyalkylene groups having 2 to 18 carbon atoms, glycidol reaction residues, and alkyl glycidyl ether reaction residues having 4 to 18 carbon atoms.
  • n is an integer of 1 to 100, and when a plurality of n are present in one molecule, they may be the same or different, and s is 1 to An integer of 10, p is an integer of 0 to 10, q is an integer of 0 to 9, r is an integer of 0 to 9, m is an integer of 0 to 9, p + r is an integer of 1 to 10, and p + q + r is 1 to 10 An integer, p + q + r + m, is an integer of 2 to 10.
  • the reaction residue (R 1 ) of an active hydrogen compound having 1 to 25 carbon atoms means a reaction residue obtained by removing active hydrogen from an active hydrogen compound having 1 to 25 carbon atoms.
  • the active hydrogen-containing compound having 1 to 25 carbon atoms include compounds containing at least one hydroxyl group (—OH), imino group (—NH—), amino group (—NH 2 ) and / or carboxyl group (—COOH). And includes alcohols, amides, amines, carboxylic acids, hydroxycarboxylic acids and aminocarboxylic acids.
  • alcohol examples include monool (methanol, butanol, stearyl alcohol, oleyl alcohol and isostearyl alcohol) and polyol (ethylene glycol, propylene glycol, glycerin, diglycerin, tetraglycerin, trimethylolpropane, pentaerythritol, dipentaerythritol, Dihydroxyacetone, fructose, glucose, mannose, galactose, sucrose, lactose, trehalose, etc.).
  • monool methanol, butanol, stearyl alcohol, oleyl alcohol and isostearyl alcohol
  • polyol ethylene glycol, propylene glycol, glycerin, diglycerin, tetraglycerin, trimethylolpropane, pentaerythritol, dipentaerythritol, Dihydroxyacetone, fructose, glucose, mannose, galactose, sucrose, lacto
  • amide examples include monoamide (formic acid amide, propionic acid amide, stearyl amide, etc.), polyamide (malonic acid diamide, ethylene bisoctylamide, etc.) and the like.
  • amines examples include monoamines (such as dimethylamine, ethylamine, aniline and stearylamine) and polyamines (such as ethylenediamine, diethylenetriamine and triethylenetetramine).
  • carboxylic acids examples include monocarboxylic acids (such as acetic acid, stearic acid, oleic acid, and benzoic acid) and polycarboxylic acids (such as maleic acid and hexanedioic acid).
  • monocarboxylic acids such as acetic acid, stearic acid, oleic acid, and benzoic acid
  • polycarboxylic acids such as maleic acid and hexanedioic acid
  • hydroxycarboxylic acid examples include hydroxyacetic acid, tartaric acid, malic acid, and 12-hydroxystearic acid.
  • aminocarboxylic acids examples include glycine, 4-aminobutyric acid, 6-aminohexanoic acid and 12-aminolauric acid.
  • Examples of the monovalent organic group (R 2 , R 3 ) having 1 to 24 carbon atoms include an alkyl group (R), an alkenyl group (R ′), an acyl group (—COR), an aroyl group (—COR ′), N -Alkylcarbamoyl group (-CONHR), N-alkenylcarbamoyl group (-CONHR '), alkylcarbonylamino group (-NHCOR), alkenylcarbonylamino group (-NHCOR'), alkylcarboxyamino group (alkylcarbamate group, -NHCOOR) ) And an alkenylcarboxyamino group (alkenyl carbamate group, —NHCOOR ′).
  • alkyl group (R) examples include methyl, ethyl, isopropyl, t-butyl, octyl, 2-ethylhexyl, dodecyl and octadecyl.
  • alkenyl group (R ′) examples include vinyl, propenyl, hexenyl, isooctenyl, dodecenyl and octadecenyl.
  • the monovalent organic groups having 1 to 24 carbon atoms include the same organic groups as described above.
  • Examples of the divalent organic group (R 4 ) having 1 to 24 carbon atoms include an alkylene group (T), an alkenylene group (T ′), a 1-oxaalkylene group (—OT—), and a 1-oxaalkenylene group (—OT).
  • alkylene group (T) examples include methylene, ethylene, isobutylene, 1,10-decylene, 1,2-decylene, 1,12-dodecylene, 1,2-dodecylene and 1,2-octadecylene.
  • alkenylene group (T ′) examples include ethynylene, isobutynylene, 1,10-decynylene, 1-octylethynylene, 1-octenylethylene, 1,12-dodecynylene, 1-octadecenylethylene, and the like.
  • reaction residues of glycidol reaction residues of alkyl glycidyl ethers having 4 to 18 carbon atoms or reaction residues (AO, OA) of alkenyl glycidyl ethers having 5 to 18 carbon atoms
  • oxyalkylene group having 2 to 18 carbon atoms oxyethylene, oxypropylene, oxybutylene, oxyisobutylene, oxy-1,2-decylene, oxy-1,12-dodecylene, oxy-1,2-dodecylene and oxy- 1,2-octadecylene and the like can be mentioned.
  • examples of the alkyl glycidyl ether having 4 to 18 carbon atoms include methyl glycidyl ether, ethyl glycidyl ether, butyl glycidyl ether, 2-ethylhexyl glycidyl ether, dodecyl glycidyl ether and octadecyl glycidyl ether. It is done.
  • the alkenyl glycidyl ether having 5 to 18 carbon atoms includes vinyl glycidyl ether, butenyl glycidyl ether, 2-ethylhexenyl glycidyl ether, dodecenyl glycidyl ether, and octadecenyl glycidyl ether. Examples include ether.
  • N is an integer of 1 to 100, preferably an integer of 10 to 90, more preferably an integer of 15 to 80.
  • polyether compound (A1) represented by the general formula (1) polyoxyethylene polyoxypropylene monobutyl ether, ethylene oxide propylene oxide block adduct of dodecyl alcohol, propylene oxide ethylene oxide block adduct of tetradecyl alcohol, 2- Ethylene oxide propylene oxide block adduct of ethylhexyl alcohol, propylene oxide ethylene oxide block adduct of trimethylolpropane, polyoxyethylene polyoxypropylene glycol (block addition), ethylene oxide propylene oxide block adduct of glycerin, propylene oxide ethylene oxide block adduct of glycerin , Ethylene oxide propylene oxide block of monododecylamine Adduct and ethylene oxide propylene oxide block adduct of pentaerythritol.
  • the polyether compound (A2) represented by the general formula (2) includes polyoxyethylene polyoxypropylene glycol (block addition) dioleate, glycerin ethylene oxide propylene oxide block adduct monostearate, maleic acid ethylene oxide propylene Examples thereof include monomethyl ether of an oxide block adduct.
  • Examples of the polyether compound (A3) represented by the general formula (3) include an ethylene oxide adduct of ethylenebisstearylamide, and an esterified product of trimellitic acid with polyoxyethylene polyoxypropylene monobutyl ether and 2-ethylhexanol. Can be mentioned.
  • Examples of the polyether compound (A4) represented by the general formula (4) include an ethylene oxide adduct of castor oil and an ethylene oxide adduct of glycerin bis (12-hydroxystearate).
  • Examples of the polyether compound (A5) represented by the general formula (5) include a reactant of polyoxyethylene monolauryl ether, polyoxyethylene glycol, and hexamethylene diisocyanate.
  • the polyether compound (A1) represented by the general formula (1) and the polyether compound (A2) represented by the general formula (2) are preferable from the viewpoint of defoaming property and the like.
  • Examples of the metal oxide fine particles (B) selected from fumed metal oxides and colloidal metal oxides include hydrophilic fumed metal oxides, hydrophobic fumed metal oxides, hydrophilic colloidal metal oxides, and hydrophobic colloidal metal oxides.
  • Hydrophilic fumed silica, hydrophobic fumed silica, hydrophobic fumed alumina, hydrophobic fumed titanium, hydrophilic colloidal silica, hydrophobic colloidal silica and the like can be used.
  • fumed metal oxides are preferable, hydrophobic fumed metal oxides are more preferable, and hydrophobic fumed silica is particularly preferable.
  • Metal oxide fine particles (B) can be easily obtained from the market.
  • AEROSIL series R972, R974, RX200, RX300, RY200, R202, R805, etc.
  • Nippon Aerosil Co., Ltd. “AEROSIL” is a registered trademark of Evonik Degussa GmbH.
  • REOLOSIL series MT-10, DM-10 and DM-20S, etc., Tokuyama Co., Ltd., “REOLOSIL” is a registered trademark of the company.
  • HDK series (HDKH15 and HDKH18) Asahi Kasei Wacker Silicone Co., Ltd., “HDK” is a registered trademark of Wacker Chemie AG. The same shall apply hereinafter.
  • CAB-O-SIL series (TS-720, TS-622, TS-382, etc.) Cabot Carbon, AB-O-SIL "is Kiyabotsuto co -.. Is a registered trademark of Pareishiyan the same applies hereinafter), and the like.
  • hydrophilic fumed silica examples include AEROSIL series (50, 130, 200, 300, R812, etc.); REOLOSIL series (QS-10, QS-30, QS-40, S-102, etc., Tokuyama Corporation) HDK series (HDKN20 and HDKS13, etc., Asahi Kasei Wacker Silicone Co., Ltd.) CAB-O-SIL series (EH-5, S-5, etc., Cabot Carbon Co., Ltd.) and the like.
  • AEROSIL series 50, 130, 200, 300, R812, etc.
  • REOLOSIL series QS-10, QS-30, QS-40, S-102, etc., Tokuyama Corporation
  • HDK series HDKN20 and HDKS13, etc., Asahi Kasei Wacker Silicone Co., Ltd.
  • CAB-O-SIL series EH-5, S-5, etc., Cabot Carbon Co., Ltd.
  • AEROXIDE As a trade name of hydrophobic fumed alumina, AEROXIDE series (AluC805 etc., Nippon Aerosil Co., Ltd., “AEROXIDE” is a registered trademark of Evonik Degussa GmbH, and the same shall apply hereinafter).
  • AEROXIDE series T805, NKT90, etc.
  • hydrophilic colloidal silica examples include Snowtex series (S, NS, etc., Nissan Chemical Industries, Ltd., “Snowtex” is a registered trademark of the company), Adelite series (AT-20A, etc., Ltd.) ADEKA and “Adelite” are registered trademarks of the same company).
  • hydrophobic colloidal silica CAB-O-SIL TGC191 and the like can be mentioned.
  • the methanol wettability (M value) of the metal oxide fine particles (B) is preferably 35 to 65, more preferably 36 to 63, particularly preferably 38 to 62, and most preferably 40 to 60. Within this range, the antifoaming property is further improved.
  • the M value is an index representing the degree of hydrophobicity, and means the volume% of a uniform dispersion having the smallest methanol concentration among several water / methanol mixed solutions having different concentrations, and is measured as follows. Is the value to be It can be said that the higher this value, the higher the hydrophobicity.
  • M value ⁇ Measuring method of methanol wettability (M value)> A mixed water / methanol solution is prepared in which the methanol concentration is changed at intervals of 5% by volume. Next, 0.2 g of the measurement sample is put, the test tube is covered, and the sample is turned upside down 20 times and left to stand for 1 to 2 minutes. Then, the aggregate is observed, and there is no aggregate. Of the dispersions wet and uniformly dispersed, the concentration (volume%) of methanol in the dispersion having the smallest methanol concentration is taken as the M value. Usually, the unit (volume%) of the M value is not described. ⁇ .
  • the content (% by weight) of the polyether compound (A) is preferably 80 to 99.9, more preferably 85 to 99, based on the weight of the polyether compound (A) and the metal oxide fine particles (B). .8, particularly preferably 88 to 99.7, most preferably 90 to 99.5. Within these ranges, the defoaming property and handleability are further improved.
  • the content (% by weight) of the metal oxide fine particles (B) is preferably 0.1 to 20, more preferably 0.8 based on the weight of the polyether compound (A) and the metal oxide fine particles (B). It is 2 to 15, particularly preferably 0.3 to 12, and most preferably 0.5 to 10. Within these ranges, the defoaming property and handleability are further improved.
  • the antifoaming agent of the present invention comprises a polyether (A) and metal oxide fine particles (B), that is, does not contain other components, but the antifoaming agent of the present invention further contains water (C). Can do.
  • water distilled water, ion exchange water, tap water, industrial water, well water, spring water, river water, and the like can be used. Among these, tap water, industrial water, ion exchange water and distilled water are preferable, and ion exchange water and distilled water are more preferable.
  • the content (% by weight) of water (C) is preferably 1 to 10, based on the weight of the polyether compound (A) and the metal oxide fine particles (B), It is preferably 2 to 8, particularly preferably 3 to 6.
  • the antifoaming agent of the present invention exhibits excellent antifoaming properties with respect to an aqueous solution of a water-soluble resin (particularly polyvinyl alcohol) and does not reduce transparency, but an aqueous foaming liquid other than an aqueous water-soluble resin solution ⁇ for example, drainage , Paper making process white water, water-based paint, etc. ⁇ .
  • the antifoaming agent of the present invention When the antifoaming agent of the present invention is added to the water-soluble resin, it may be added at any timing, but it is preferable to uniformly mix after the addition.
  • the antifoaming agent may be diluted with an appropriate diluent solvent (for example, methanol or water) upon addition (the diluent solvent is preferably distilled off during or after mixing).
  • the antifoaming agent of the present invention When the antifoaming agent of the present invention is added to the water-soluble resin aqueous solution, it may be added at any timing, and at the time of addition, the antifoaming agent may be diluted with an appropriate diluent solvent (for example, methanol or water). Good.
  • an appropriate diluent solvent for example, methanol or water.
  • the water-soluble resin composition of the present invention contains a water-soluble resin and the antifoaming agent, and examples of the water-soluble resin include alkyd resins, acrylic resins, styrene maleic acid copolymers, cellulose derivatives (methyl cellulose, carboxymethyl cellulose, Hydroxyethylcellulose, hydroxypropylcellulose and hydroxypropylmethylcellulose), polyvinylpyrrolidone, polyvinyl alcohol, starch, starch derivatives (such as oxidized starch and cationized starch), polyacrylamide, polyethylene glycol and polysaccharides (such as xanthan gum and guar gum) . Of these, polyvinyl alcohol is preferred.
  • the content of the antifoaming agent can be appropriately determined according to the foamed state, but the content of the antifoaming agent contained in the water-soluble resin composition is about 0.01 to 1% by weight based on the weight of the water-soluble resin. It is.
  • the water-soluble resin aqueous solution of the present invention contains a water-soluble resin, the antifoaming agent and water, and the same water-soluble resin and water as those described above can be used.
  • the content of the antifoaming agent can be appropriately determined depending on the foamed state, but the content of the antifoaming agent contained in the water-soluble resin aqueous solution is about 0.01 to 1% by weight based on the weight of the water-soluble resin. is there.
  • the water content can be appropriately determined according to the use, etc., but the water content contained in the water-soluble resin aqueous solution is about 300 to 10,000% by weight based on the weight of the water-soluble resin.
  • part means part by weight
  • % means weight%
  • cloud point means cloud point% in a 1% by weight ion exchange aqueous solution.
  • polyether compounds (a1) to (a5) were used as the polyether compound (A).
  • Polyether compound (a1) glycerin propylene oxide (40 mol) ethylene oxide (15 mol) block adduct, cloud point 31 ° C.
  • Polyether compound (a2) 2-ethylhexanol ethylene oxide (8 mol) propylene oxide (7 mol) block adduct, cloud point 20 ° C.
  • Polyether compound (a3) Geolate of ethylene oxide (13 mol) propylene oxide (30 mol) block copolymer, cloud point 25 ° C.
  • Polyether compound (a5) ethylene oxide (22 mol) propylene oxide (19 mol) block adduct of lauryl alcohol, cloud point 28 ° C.
  • Example 1 In a stirrable container, 990 parts of the polyether compound (a1) and 10 parts of fumed silica (b1) were stirred and mixed for 30 minutes to obtain the antifoaming agent (1) of the present invention.
  • Example 2 In a stirrable container, 995 parts of the polyether compound (a2) and 5 parts of fumed silica (b2) were stirred and mixed for 30 minutes to obtain the antifoaming agent (2) of the present invention.
  • Example 3 In a stirrable container, 900 parts of the polyether compound (a3) and 100 parts of fumed silica (b3) were stirred and mixed for 30 minutes to obtain the antifoaming agent (3) of the present invention.
  • Example 4 In a stirrable container, 970 parts of the polyether compound (a4), 30 parts of fumed silica (b1) and 60 parts of water (c1) ⁇ ion-exchanged water ⁇ are stirred and mixed for 30 minutes, and the defoaming of the present invention Agent (4) was obtained.
  • Example 5 In a stirrable container, 950 parts of the polyether compound (a5), 50 parts of fumed silica (b4) and 30 parts of water (c1) are stirred and mixed for 30 minutes to obtain the antifoaming agent (5) of the present invention. Obtained.
  • Example 6 In a stirrable container, 500 parts of the polyether compound (a2), 470 parts of the polyether compound (a5), 30 parts of fumed silica (b1) and 60 parts of water (c1) are stirred and mixed for 30 minutes. An antifoaming agent (6) of the invention was obtained.
  • Example 7 In a stirrable container, 300 parts of the polyether compound (a1), 697 parts of the polyether compound (a5), 3 parts of fumed silica (b2) and 100 parts of water (c1) are stirred and mixed for 30 minutes. An antifoaming agent (7) of the invention was obtained.
  • Example 8 In a stirrable container, 300 parts of the polyether compound (a3), 600 parts of the polyether compound (a5), 100 parts of fumed silica (b3) and 30 parts of water (c1) are stirred and mixed for 30 minutes. An antifoaming agent (8) of the invention was obtained.
  • Example 9 In a stirrable container, 300 parts of the polyether compound (a4), 695 parts of the polyether compound (a5), 5 parts of fumed silica (b4) and 30 parts of water (c1) are stirred and mixed for 30 minutes. An inventive antifoam (9) was obtained.
  • Defoamers (1) to (9) and (H1) were used to evaluate defoaming properties and transparency as follows, and the evaluation results are shown in Tables 1 and 2.
  • defoaming test solution 40 parts of water-soluble resin composition for test and 960 parts of ion-exchanged water (about 25 ° C.) were heated to 90 ° C. with stirring and mixing, and then stirred and mixed at 90 ° C. for 30 minutes for testing water-soluble resin. After the composition was uniformly dissolved, it was cooled to about 25 ° C., and ion-exchanged water evaporated by heating was added to adjust the concentration of polyvinyl alcohol to 4% to obtain an antifoam test solution.
  • An antifoam test liquid (blank) was also prepared in the same manner as described above except that the water-soluble resin composition for test was changed to polyvinyl alcohol (one in which the antifoaming agent was not uniformly mixed).
  • Defoaming property test A glass 500 ml graduated cylinder (hereinafter referred to as a foam tube) is immersed in a water bath whose temperature is adjusted to 80 ° C. up to a scale of 95 ml of the foam tube. Put 100 ml of defoaming test solution with temperature control, insert a diffuser stone to the bottom of the foaming tube and bubbling nitrogen gas at 300 ml / min. Reading was performed 15 seconds after the start of the test, 1 minute later and 2 minutes later. A smaller value means that the defoaming property is higher, which is preferable.
  • the antifoaming agent of the present invention exhibited excellent antifoaming properties as compared with a comparative antifoaming agent.
  • the defoaming test solution used in the defoaming test was defoamed by allowing it to stand at 25 ° C. for 24 hours in a sealed state after the test to obtain a transparency test solution.
  • the haze value (%: wt%) of this transparency test solution Rather than the percentage of scattered light relative to the total transmitted light) was measured using a turbidimeter (Nippon Denshoku Industries Co., Ltd., WATER ANALYZER 2000N), and the haze value was used as an index of transparency. The lower the haze value, the better the transparency.
  • the antifoaming agent (H1) used in Patent Document 1 had a significant adverse effect on transparency.
  • the antifoaming agent of the present invention is suitable for use in the process of using a water-soluble resin in fields such as the chemical industry, the petroleum industry, the textile industry, and the paper pulp industry where the water-soluble resin is used.

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  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
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Abstract

La présente invention a pour objet de produire un agent anti-moussant qui ne réduit pas la transparence, même lorsqu'il est appliqué à une résine hydrosoluble, et présente un excellent pouvoir anti-moussant. L'invention concerne un agent anti-moussant caractérisé en ce qu'il comprend: un composé polyéther dans lequel le point de trouble dans une solution aqueuse d'échange d'ions à 1% est de 20 à 60°C; et des microparticules d'un oxyde métallique choisi parmi un oxyde métallique sublimé et un oxyde métallique colloïdal, la teneur en composé polyéther étant de 80 à 99,9% et la teneur en microparticules d'oxyde métallique étant de 0,1 à 20% sur la base du poids du composé polyéther et des microparticules d'oxyde métallique. Elle concerne un agent anti-moussant caractérisé en ce qu'il comprend: un composé polyéther dans lequel le point de trouble dans une solution aqueuse d'échange d'ions à 1% est de 20 à 60°C; des microparticules d'oxyde métallique; et de l'eau, la teneur en composé polyéther étant de 80 à 99,9%, la teneur en microparticules d'oxyde métallique étant de 0,1 à 20%, et la teneur en eau étant de 1 à 10% sur la base du poids du composé polyéther et des microparticules d'oxyde métallique.
PCT/JP2016/056446 2015-03-31 2016-03-02 Agent antimoussant, composition de résine hydrosoluble contenant ledit agent et résine hydrosoluble contenant ledit agent WO2016158177A1 (fr)

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