WO2015045883A1 - (メタ)アクリル酸系共重合体とその製造方法 - Google Patents
(メタ)アクリル酸系共重合体とその製造方法 Download PDFInfo
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- WO2015045883A1 WO2015045883A1 PCT/JP2014/074059 JP2014074059W WO2015045883A1 WO 2015045883 A1 WO2015045883 A1 WO 2015045883A1 JP 2014074059 W JP2014074059 W JP 2014074059W WO 2015045883 A1 WO2015045883 A1 WO 2015045883A1
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- 0 C*(C)CC[N+]([N+](*)[N-])[O-] Chemical compound C*(C)CC[N+]([N+](*)[N-])[O-] 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
Definitions
- the present invention relates to a (meth) acrylic acid copolymer and a method for producing the same.
- the (meth) acrylic acid copolymer has a large number of carboxyl groups or salts thereof, it can exhibit excellent chelating action and dispersing action. For this reason, a (meth) acrylic acid type copolymer can be used for various uses, such as a dispersing agent, a water treatment agent, a scale inhibitor, for example.
- An object of the present invention is to form a structural unit derived from a sulfonic acid (salt) group-containing monomer and a structural unit derived from (meth) acrylic acid (salt), which can exhibit an excellent effect on dispersion of hydrophobic particles. It is in providing the (meth) acrylic-acid type copolymer included as. Moreover, it is providing the manufacturing method of such a (meth) acrylic-acid type copolymer.
- the (meth) acrylic acid copolymer of the present invention comprises 1% by mass to 20% by mass of the structural unit (a) derived from the ether bond-containing hydrophobic monomer (A) represented by the general formula (1).
- R 1 is a hydrogen atom or a methyl group
- R 2 is an alkylene group having 1 to 10 carbon atoms
- R 3 is an alkylene group having 1 to 10 carbon atoms
- R 4 is H or a hydroxyl group
- R 5 is —OR 6 group or R 6
- R 6 is an alkyl group having 1 to 20 carbon atoms.
- R 7 is a hydrogen atom or a methyl group
- X is —NH— or —O—
- R 8 is an alkylene group having 1 to 10 carbon atoms
- M is a hydrogen atom.
- the (meth) acrylic acid copolymer of the present invention has a weight average molecular weight of 5,000 to 1,000,000.
- the monomer (A) is 1-allyloxy-3-butoxypropan-2-ol represented by the chemical formula (2), a hexene oxide adduct of isoprenol represented by the chemical formula (3), a chemical formula It is at least one selected from allyl butyl ether represented by (4).
- the monomer (B) is 2-acrylamido-2-methylpropanesulfonic acid (salt) represented by the chemical formula (5).
- M represents a hydrogen atom, a metal atom, an ammonium group (ammonium salt, that is, SO 3 NH 4 is constituted), or an organic amino group (an organic amine salt is constituted).
- the production method of the (meth) acrylic acid copolymer of the present invention is as follows: Ether bond-containing hydrophobic monomer (A) represented by general formula (1), sulfonic acid (salt) group-containing monomer (B) represented by general formula (6), and (meth) acrylic acid (salt) A method for producing a (meth) acrylic acid copolymer by polymerizing a monomer containing (C),
- the use ratio of the monomer (A) / the monomer (B) / the (meth) acrylic acid (salt) (C) is 1% by mass to 20% by mass / 1% by mass to 50% by mass / 30% by mass to 98%. % By mass.
- R 1 is a hydrogen atom or a methyl group
- R 2 is an alkylene group having 1 to 10 carbon atoms
- R 3 is an alkylene group having 1 to 10 carbon atoms
- R 4 is H or a hydroxyl group
- R 5 is —OR 6 group or R 6
- R 6 is an alkyl group having 1 to 20 carbon atoms.
- R 7 is a hydrogen atom or a methyl group
- X is —NH— or —O—
- R 8 is an alkylene group having 1 to 10 carbon atoms
- M is a hydrogen atom.
- the monomer (A) is 1-allyloxy-3-butoxypropan-2-ol represented by the chemical formula (2), a hexene oxide adduct of isoprenol represented by the chemical formula (3), a chemical formula It is at least one selected from allyl butyl ether represented by (4).
- the monomer (B) is 2-acrylamido-2-methylpropanesulfonic acid (salt) represented by the chemical formula (5).
- M represents a hydrogen atom, a metal atom, an ammonium group (ammonium salt, that is, SO 3 NH 4 is constituted), or an organic amino group (an organic amine salt is constituted).
- (Meth) acrylic acid-based copolymer can be provided.
- the manufacturing method of such a (meth) acrylic-acid type copolymer can be provided.
- the (meth) acrylic acid copolymer of the present invention comprises 1% by mass to 20% by mass of the structural unit (a) derived from the ether bond-containing hydrophobic monomer (A) represented by the general formula (1).
- R 1 is a hydrogen atom or a methyl group
- R 2 is an alkylene group having 1 to 10 carbon atoms
- R 3 is an alkylene group having 1 to 10 carbon atoms
- R 4 is H or a hydroxyl group
- R 5 is —OR 6 group or R 6
- R 6 is an alkyl group having 1 to 20 carbon atoms.
- R 7 is a hydrogen atom or a methyl group
- X is —NH— or —O—
- R 8 is an alkylene group having 1 to 10 carbon atoms
- M is a hydrogen atom.
- (meth) acryl means acrylic and / or methacrylic.
- R 1 is a hydrogen atom or a methyl group.
- R 2 is an alkylene group having 1 to 10 carbon atoms, preferably an alkylene group having 1 to 8 carbon atoms, more preferably an alkylene group having 1 to 5 carbon atoms, An alkylene group having 1 to 3 carbon atoms is preferable, and an alkylene group having 1 to 2 carbon atoms (that is, —CH 2 — or —CH 2 CH 2 —) is particularly preferable.
- R 3 is an alkylene group having 1 to 10 carbon atoms, preferably an alkylene group having 1 to 8 carbon atoms, more preferably an alkylene group having 1 to 5 carbon atoms, An alkylene group having 1 to 3 carbon atoms is preferable, an alkylene group having 1 to 2 carbon atoms is particularly preferable, and an alkylene group having 1 carbon atom (that is, —CH 2 —) is most preferable.
- R 4 is H or a hydroxyl group.
- R 5 is —OR 6 group or R 6
- R 6 is an alkyl group having 1 to 20 carbon atoms, preferably an alkyl group having 1 to 18 carbon atoms, more preferably An alkyl group having 1 to 13 carbon atoms, more preferably an alkyl group having 1 to 8 carbon atoms, and particularly preferably an alkyl group having 1 to 5 carbon atoms.
- the ether bond-containing hydrophobic monomer (A) is a compound represented by the general formula (1) as described above, the (meth) acrylic acid copolymer of the present invention can be used for dispersion of hydrophobic particles. Can exhibit excellent effects.
- the ether bond-containing hydrophobic monomer (A) is particularly preferably a 1-allyloxy-3-butoxypropan-2-ol represented by the chemical formula (2) or a hexene oxide adduct of isoprenol represented by the chemical formula (3) , At least one selected from allyl butyl ether represented by the chemical formula (4).
- the ether bond-containing hydrophobic monomer (A) comprises 1-allyloxy-3-butoxypropan-2-ol represented by chemical formula (2), hexene oxide adduct of isoprenol represented by chemical formula (3), chemical formula (4) ),
- the (meth) acrylic acid copolymer of the present invention can exhibit more excellent effects on the dispersion of hydrophobic particles.
- the structural unit (a) derived from the ether bond-containing hydrophobic monomer (A) is a structure in which the unsaturated double bond in the general formula (1) has become a saturated bond by a polymerization reaction, and in the general formula (1a) expressed.
- R 1 is a hydrogen atom or a methyl group
- R 2 is an alkylene group having 1 to 10 carbon atoms
- R 3 is an alkylene group having 1 to 10 carbon atoms
- R 4 is H or a hydroxyl group
- R 5 is —OR 6 group or R 6
- R 6 is an alkyl group having 1 to 20 carbon atoms.
- the (meth) acrylic acid copolymer of the present invention may contain only one type of structural unit (a) derived from the ether bond-containing hydrophobic monomer (A) represented by the general formula (1). Two or more kinds may be included.
- the (meth) acrylic acid derivative represented by the general formula (6) and having a sulfonic acid (salt) group at the terminal does not have an ether bond (an etheric —O— bond).
- the etheric —O— bond is different from the —O— bond in the ester bond (the —O— bond included in the COO bond).
- sulfonic acid means sulfonic acid and / or a salt thereof.
- M is a metal atom (metal salt), an ammonium group (ammonium salt, That is, it means a case of SO 3 NH 4 ) or an organic amino group (constituting an organic amine salt).
- R 7 is a hydrogen atom or a methyl group.
- X is —NH— or —O—.
- R 8 is an alkylene group having 1 to 10 carbon atoms, preferably an alkylene group having 1 to 8 carbon atoms, more preferably an alkylene group having 1 to 5 carbon atoms, still more preferably.
- M is a hydrogen atom, a metal atom, an ammonium group (ammonium salt, ie, constituting COONH 4 ), or an organic amino group (constituting an organic amine salt).
- the metal atom include alkali metals such as sodium atom and potassium atom, alkaline earth metals such as calcium atom, and transition metals such as iron atom.
- the organic amine salt include primary to quaternary amine salts such as methylamine salt, n-butylamine salt, monoethanolamine salt, dimethylamine salt, diethanolamine salt, morpholine salt, and trimethylamine salt.
- the (meth) acrylic acid copolymer of the present invention is dispersed in hydrophobic particles. An excellent effect can be exhibited.
- the sulfonic acid (salt) group-containing monomer (B) is preferably 2-acrylamido-2-methylpropanesulfonic acid (salt) represented by the chemical formula (5) or 2-sulfoethyl represented by the chemical formula (7).
- M represents a hydrogen atom, a metal atom, an ammonium group (ammonium salt, that is, SO 3 NH 4 is constituted), or an organic amino group (an organic amine salt is constituted).
- M is a hydrogen atom, a metal atom, an ammonium group (composing an ammonium salt, that is, SO 3 NH 4 ), or an organic amino group (composing an organic amine salt).
- the structural unit (b) derived from the sulfonic acid (salt) group-containing monomer (B) is a structure in which the unsaturated double bond in the sulfonic acid (salt) group-containing monomer (B) is saturated by a polymerization reaction.
- the sulfonic acid (salt) group-containing monomer (B) is represented by the general formula (6), it is represented by the general formula (6a).
- R 7 is a hydrogen atom or a methyl group
- X is —NH— or —O—
- R 8 is an alkylene group having 1 to 10 carbon atoms
- M is a hydrogen atom.
- the (meth) acrylic acid copolymer of the present invention may contain only one type of structural unit (b) derived from the sulfonic acid (salt) group-containing monomer (B), or two or more types. May be.
- (Meth) acrylic acid (salt) (C) means acrylic acid (salt) and / or methacrylic acid (salt).
- Acrylic acid (salt) means acrylic acid and / or acrylate, and methacrylic acid (salt) means methacrylic acid and / or methacrylate.
- salt is a salt of a carboxyl group represented by COOM
- M is a metal atom, an ammonium group (constituting an ammonium salt, ie, COONH 4 ), or an organic amino group (constituting an organic amine salt).
- the metal atom include alkali metals such as sodium atom and potassium atom, alkaline earth metals such as calcium atom, and transition metals such as iron atom.
- organic amine salt include primary to quaternary amine salts such as methylamine salt, n-butylamine salt, monoethanolamine salt, dimethylamine salt, diethanolamine salt, morpholine salt, and trimethylamine salt.
- the structural unit (c) derived from (meth) acrylic acid (salt) (C) is a structural unit having a polymer structure formed by polymerization of (meth) acrylic acid (salt), and — [CH 2 —CR 9 (COOM 1 )] —.
- R 9 is a hydrogen atom or a methyl group.
- M 1 is a hydrogen atom, a metal atom, an ammonium group (which constitutes an ammonium salt, ie, COONH 4 ), or an organic amino group (which constitutes an organic amine salt). These metal atom, ammonium group and organic amino group are the same as M described above.
- the (meth) acrylic acid copolymer of the present invention may contain only one type of structural unit (c) derived from (meth) acrylic acid (salt) (C), or two or more types. May be.
- the (meth) acrylic acid copolymer of the present invention comprises 1% by mass to 20% by mass of the structural unit (a) derived from the ether bond-containing hydrophobic monomer (A) represented by the general formula (1), and sulfonic acid.
- the proportion of the structural unit (a), the structural unit (b), and the structural unit (c) is within the above range, so that the (meth) acrylic of the present invention is present.
- the acid copolymer can exhibit an excellent effect on the dispersion of the hydrophobic particles.
- the said ratio is a ratio with respect to all the structural units derived from all the monomers which comprise the (meth) acrylic-acid type copolymer of this invention.
- the content of the structural unit (a) derived from the ether bond-containing hydrophobic monomer (A) represented by the general formula (1) is 1% by mass to 20% by mass. In terms of more effectively expressing the effects of the present invention, it is preferably 1% by mass to 19% by mass, more preferably 1% by mass to 18% by mass, and even more preferably 2% by mass to It is 17% by mass, particularly preferably 3% by mass to 15% by mass, and most preferably 5% by mass to 15% by mass.
- the said ratio is a ratio with respect to all the structural units derived from all the monomers which comprise the (meth) acrylic-acid type copolymer of this invention.
- the content ratio of the structural unit (b) derived from the sulfonic acid (salt) group-containing monomer (B) is 1% by mass to 50% by mass. From the viewpoint of expressing the effect more effectively, it is preferably 4% by mass to 45% by mass, more preferably 6% by mass to 40% by mass, still more preferably 7% by mass to 35% by mass, The amount is preferably 8% by mass to 30% by mass, and most preferably 10% by mass to 30% by mass.
- the said ratio is a ratio with respect to all the structural units derived from all the monomers which comprise the (meth) acrylic-acid type copolymer of this invention.
- the content ratio of the structural unit (c) derived from (meth) acrylic acid (salt) (C) is 30% by mass to 98% by mass. In terms of expressing the effect more effectively, it is preferably 36% by mass to 95% by mass, more preferably 42% by mass to 93% by mass, still more preferably 48% by mass to 91% by mass, Preferably, it is 55 to 89% by mass, and most preferably 55 to 85% by mass.
- the said ratio is a ratio with respect to all the structural units derived from all the monomers which comprise the (meth) acrylic-acid type copolymer of this invention.
- the (meth) acrylic acid copolymer of the present invention includes a structural unit (a) derived from the ether bond-containing hydrophobic monomer (A) represented by the general formula (1) within a range not impairing the effects of the present invention.
- Structural unit derived from other monomer (D) other than structural unit (b) derived from sulfonic acid (salt) group-containing monomer (B) and structural unit (c) derived from (meth) acrylic acid (salt) (C) (D) may be included.
- the structural unit (d) derived from the other monomer (D) is a structural unit having a polymer structure formed by polymerization of the other monomer (D).
- any appropriate monomer can be adopted as long as the effects of the present invention are not impaired.
- examples of such other monomer (D) include (meth) acrylic acid such as crotonic acid (salt), ⁇ -hydroxyacrylic acid (salt), ⁇ -hydroxymethylacrylic acid (salt), and derivatives thereof.
- Salt monomers
- Unsaturated dicarboxylic acid (salt) monomers such as itaconic acid (salt), fumaric acid (salt), maleic acid (salt), 2-methyleneglutaric acid (salt);
- N-vinyl monomer Amide monomers such as (meth) acrylamide, N, N-dimethylacrylamide, N-isopropylacrylamide; Allyl ether monomers such as (meth) allyl alcohol; Isoprenol , Isoprene monomers; (meth) acrylic acid alkyl ester monomers such as butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, dodecyl (meth) acrylate; hydroxyethyl (meth) acrylate, 2- Hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, ⁇ -hydroxymethylethyl (meth) acrylate, hydroxy N-methyl (meth) acrylate, hydroxyneopentyl (me
- the (meth) acrylic acid copolymer of the present invention may contain only one type of structural unit (d) derived from the other monomer (D), or may contain two or more types.
- the content of the structural unit (d) derived from the other monomer (D) is preferably 0 mass in terms of more effectively expressing the effects of the present invention. % To 68% by mass, more preferably 0% to 60% by mass, still more preferably 0% to 50% by mass, and particularly preferably 0% to 40% by mass.
- the said ratio is a ratio with respect to all the structural units derived from all the monomers which comprise the (meth) acrylic-acid type copolymer of this invention.
- the (meth) acrylic acid copolymer of the present invention has a weight average molecular weight of 3,000 to 1,000,000, preferably 4,000 to 500,000, more preferably 5,000 to 100,000, still more preferably 6,000 to 50,000, Particularly preferred is 7000 to 20000.
- the weight average molecular weight of the (meth) acrylic acid copolymer of the present invention falls within the above range, the (meth) acrylic acid copolymer of the present invention is more excellent for dispersion of hydrophobic particles. An effect can be expressed.
- the method for producing the (meth) acrylic acid copolymer of the present invention comprises an ether bond-containing hydrophobic monomer (A), a sulfonic acid (salt) group-containing monomer (B), (meth) acrylic acid (salt) ( C) is polymerized to produce a (meth) acrylic acid copolymer, the monomer (A) / the monomer (B) / the (meth) acrylic acid (salt). ) (C) is used in an amount of 1% by mass to 20% by mass / 1% by mass to 50% by mass / 30% by mass to 98% by mass.
- the production method of the acrylic acid copolymer of the present invention is preferably a batch polymerization method, but may be a continuous polymerization method. By adopting the above method, it is possible to shorten the production time or reduce the residual monomer.
- Ether-containing hydrophobic monomer (A), sulfonic acid (salt) group-containing monomer (B), (meth) acrylic acid (salt) (C) used in the method for producing the (meth) acrylic acid copolymer of the present invention ) are the same as those in the description of the (meth) acrylic acid copolymer of the present invention.
- the ether bond-containing hydrophobic monomer (A) may be used alone or in combination of two or more.
- the sulfonic acid (salt) group-containing monomer (B) may be used alone or in combination of two or more.
- (meth) acrylic acid (salt) (C) may be used alone or in combination of two or more.
- the proportion of monomer (A) / monomer (B) / (meth) acrylic acid (salt) (C) used is the amount of all monomers used. 1% by mass to 20% by mass / 1% by mass to 50% by mass / 30% by mass to 98% by mass, preferably 1% by mass to 19% by mass / 4% by mass to 45% by mass / 36%. % By mass to 95% by mass, more preferably 1% by mass to 18% by mass / 6% by mass to 40% by mass / 42% by mass to 93% by mass, and further preferably 2% by mass to 17% by mass.
- the usage ratio of monomer (A) / monomer (B) / (meth) acrylic acid (salt) (C) is determined based on the usage amount of all monomers.
- the (meth) acrylic acid copolymer obtained by the production method of the present invention can exhibit an excellent effect on the dispersion of hydrophobic particles.
- the usage ratio of each monomer deviates from the above range, for example, when the usage amount of the monomer (A) exceeds 20% by mass, the polymerizability may decrease and the residual monomer may increase.
- the usage-amount of a monomer (A) is less than 1 mass%, the hydrophobic effect of the (meth) acrylic acid-type copolymer obtained may not fully be expressed, and there exists a possibility that the dispersion effect with respect to hydrophobic particles may fall. is there.
- the use amount of the monomer (B) and (meth) acrylic acid (salt) (C) if it is out of the above range, the dispersion effect on the dispersion of the hydrophobic particles may be lowered.
- the usage ratio of the other monomer (D) is the same as the usage amount of all monomers in terms of more effectively expressing the effects of the present invention.
- it is preferably 0% by mass to 68% by mass, more preferably 0% by mass to 60% by mass, still more preferably 0% by mass to 50% by mass, and particularly preferably 0% by mass to 40% by mass. %.
- a monomer an ether bond-containing hydrophobic monomer (A), a sulfonic acid (salt) group-containing monomer (B), (meth) acrylic acid ( It is preferable to polymerize the salt (C) and, if necessary, other monomer (D) in the presence of a polymerization initiator.
- any appropriate polymerization initiator can be adopted as long as the effects of the present invention are not impaired.
- examples of such a polymerization initiator include hydrogen peroxide; persulfates such as sodium persulfate, potassium persulfate, and ammonium persulfate; dimethyl-2,2′-azobis (2-methylpropionate), 2, 2'-azobis (isobutyronitrile), 2,2'-azobis (2-methylbutyronitrile), 2,2'-azobis (2,4-dimethylvaleronitrile), 2,2'-azobis (4 -Methoxy-2,4-dimethylvaleronitrile), 2,2'-azobis (isobutyric acid) dimethyl, 4,4'-azobis (4-cyanovaleric acid), 2,2'-azobis (2-methylpropionamidine) ) Dihydrochloride, 2,2′-azobis [N- (2-carboxyethyl) -2-methylpropionamidine] n hydrate, 2,
- azo compounds such as benzoyl peroxide, lauroyl peroxide, peracetic acid, di-t-butyl peroxide, cumene hydroperoxide and the like.
- persulfates such as sodium persulfate, potassium persulfate, and ammonium persulfate are preferable because the effects of the present invention can be sufficiently exhibited.
- Only one polymerization initiator may be used, or two or more polymerization initiators may be used.
- any appropriate amount can be adopted as long as the copolymerization reaction of the monomer can be appropriately started.
- amount is, for example, preferably 15 g or less, more preferably 1 to 12 g in terms of sodium persulfate, per 1 mol of the total amount of monomers.
- a chain transfer agent is used for the purpose of adjusting the molecular weight of the copolymer to be obtained, as long as it does not adversely affect the copolymerization reaction. May be used.
- any appropriate chain transfer agent can be adopted as long as the effects of the present invention are not impaired.
- chain transfer agents include mercaptoethanol, thioglycerol, thioglycolic acid, 2-mercaptopropionic acid, 3-mercaptopropionic acid, thiomalic acid, octyl thioglycolate, octyl 3-mercaptopropionate, 2- Thiol chain transfer agents such as mercaptoethanesulfonic acid, n-dodecyl mercaptan, octyl mercaptan, butylthioglycolate; halides such as carbon tetrachloride, methylene chloride, bromoform, bromotrichloroethane; secondary alcohols such as isopropanol and glycerin Phosphorous acid, hypophosphorous acid, and salts thereof (sodium hypophosphite, potassium hypophosphite, etc
- Chain transfer agent Only one type of chain transfer agent may be used, or two or more types may be used.
- the use of a chain transfer agent has the advantage that the copolymer to be produced can be prevented from having a higher molecular weight than necessary, and a low molecular weight copolymer can be produced efficiently.
- the chain transfer agent may be used in any appropriate amount as long as the copolymerization reaction of the monomer can proceed appropriately.
- amount is, for example, preferably from 0.5 g to 20 g, more preferably from 1 g to 15 g, still more preferably from 2 to 10 g in terms of sodium bisulfite per 1 mol of the total amount of monomers. It is.
- the effect of the present invention can be expressed more sufficiently. It is preferable to use a combination of one or more persulfates and bisulfites.
- persulfate examples include sodium persulfate, potassium persulfate, and ammonium persulfate.
- bisulfite examples include sodium bisulfite, potassium bisulfite, and ammonium bisulfite.
- the bisulfite is preferably used in an amount of 0.1 to 5 parts by mass, more preferably 0. It is 2 to 3 parts by mass, and more preferably 0.2 to 2 parts by mass.
- the amount of bisulfite is less than 0.1 parts by mass with respect to 1 part by mass of persulfate, the effect of bisulfite may be reduced, and therefore the effect of the present invention may not be fully exhibited. There is.
- bisulfite is less than 0.1 mass part with respect to 1 mass part of persulfate, there exists a possibility that the weight average molecular weight of the (meth) acrylic-acid type copolymer obtained may become high too much.
- the amount of persulfate and bisulfite used in combination is preferably such that the total amount of persulfate and bisulfite is equivalent to sodium persulfate and sodium bisulfite in terms of 1 mol of the total amount of monomers. 1 to 20 g, more preferably 2 to 15 g, further preferably 3 to 11 g, and particularly preferably 4 to 8 g. When the total amount of persulfate and bisulfite is less than 1 g in terms of sodium persulfate and sodium bisulfite with respect to 1 mol of the total amount of monomers, the effects of the present invention are not sufficiently exhibited.
- the weight average molecular weight of the (meth) acrylic acid copolymer to be obtained may be too high.
- the total amount of persulfate and bisulfite exceeds 20 g with respect to 1 mol of the total amount of monomers, the effects of persulfate and bisulfite may not be obtained enough to match the amount used, Moreover, there exists a possibility that the purity of the (meth) acrylic acid type copolymer obtained may fall. Moreover, when the (meth) acrylic acid-type copolymer obtained is hold
- the persulfate may be dissolved in a solvent (preferably water) described later and added in the form of a persulfate solution (preferably a persulfate aqueous solution).
- a persulfate solution preferably a persulfate aqueous solution.
- the concentration of the persulfate when used as such a persulfate solution is preferably 1% by mass to 35% by mass, more preferably 5% by mass to 30% by mass. More preferably, it is 10% by mass to 20% by mass. If the concentration of the persulfate solution (preferably persulfate aqueous solution) is less than 1% by mass, transportation and storage may become complicated. When the concentration of the persulfate solution (preferably persulfate aqueous solution) exceeds 35% by mass, handling may be difficult.
- Bisulfite may be added in the form of a bisulfite solution (preferably an aqueous bisulfite solution) after dissolving in a solvent (preferably water) described later.
- concentration of bisulfite when used as such a bisulfite solution is preferably 10% by mass to 42% by mass, more preferably 20% by mass to 41% by mass. More preferably, it is 32 to 40% by mass. If the concentration of the bisulfite solution (preferably an aqueous bisulfite solution) is less than 10% by mass, transportation and storage may be complicated. When the concentration of the bisulfite solution (preferably an aqueous bisulfite solution) exceeds 42% by mass, handling may be difficult.
- a continuous charging method such as dropping or divided charging can be applied.
- the chain transfer agent may be introduced alone into the reaction vessel, or may be mixed in advance with each monomer, solvent, etc. constituting the monomer component.
- any appropriate other additive is used in the polymerization reaction system in the polymerization reaction as long as the effects of the present invention are not impaired. obtain.
- examples of such other additives include reaction accelerators, heavy metal concentration adjusting agents, pH adjusting agents, and the like.
- the reaction accelerator is used for the purpose of, for example, reducing the amount of a polymerization initiator used.
- the heavy metal concentration adjusting agent is used for the purpose of, for example, reducing the influence on the polymerization reaction that occurs when a small amount of metal is eluted from a reaction vessel or the like.
- the pH adjuster is used for the purpose of, for example, improving the efficiency of the polymerization reaction and preventing the generation of sulfurous acid gas and corrosion of the apparatus when bisulfite is used as the initiator system.
- a heavy metal compound can be used as the reaction accelerator.
- a heavy metal compound can be used.
- a polyvalent metal compound or a simple substance can be used as the heavy metal concentration adjusting agent.
- a polyvalent metal compound or a simple substance can be used.
- pH adjusters examples include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide; alkaline earth metal hydroxides such as calcium hydroxide and magnesium hydroxide; ammonia, monoethanolamine, and triethanol. Organic amine salts such as amines; and the like. Among these, alkali metal hydroxides such as sodium hydroxide and potassium hydroxide are preferable, and sodium hydroxide is particularly preferable.
- the pH adjusting agent may be referred to as a “neutralizing agent”. Only 1 type may be used for a pH adjuster, and 2 or more types may be used for it.
- the polymerization reaction is preferably performed in a solvent. Only 1 type may be used for a solvent and 2 or more types may be used for it.
- any appropriate solvent can be adopted as long as the effects of the present invention are not impaired.
- a solvent is preferably an aqueous solvent such as water, alcohol, glycol, glycerin, and polyethylene glycol, and more preferably water.
- an organic solvent suitably in the range which does not impair the effect of this invention.
- examples of such an organic solvent include lower alcohols such as methanol and ethanol; amides such as dimethylformaldehyde; ethers such as diethyl ether and dioxane; Only one organic solvent may be used, or two or more organic solvents may be used.
- the amount of the solvent used is preferably 40% by mass to 200% by mass, more preferably 45% by mass to 180% by mass, and still more preferably 50% by mass to 150% by mass with respect to the total amount of monomers. is there.
- the usage-amount of a solvent is less than 40 mass%, there exists a possibility that the weight average molecular weight of the (meth) acrylic-acid type copolymer obtained may become high too much.
- the amount of the solvent used exceeds 200% by mass, the concentration of the (meth) acrylic acid copolymer to be obtained becomes low, and in some cases, the solvent may be required to be removed.
- the solvent may be charged into the reaction vessel at the initial stage of polymerization.
- a part of the solvent may be appropriately added (dropped) into the reaction system alone during the polymerization.
- a monomer, a polymerization initiator, a chain transfer agent, and other additives may be appropriately added (dropped) into the reaction system during the polymerization together with these components in a form in which the monomer is dissolved in advance.
- the polymerization temperature of the polymerization reaction can be set to any appropriate temperature as long as the effects of the present invention are not impaired.
- the lower limit of the polymerization temperature is preferably 50 ° C. or higher, more preferably 70 ° C. or higher, and the upper limit of the polymerization temperature is preferably 99 ° C. or lower in terms of efficiently producing a copolymer. Preferably it is 95 degrees C or less.
- the set temperature (within the range of the polymerization temperature, preferably between 0 minutes and 70 minutes, more preferably between 0 and 50 minutes, and even more preferably between 0 and 30 minutes, preferably 70 ° C. to 95 ° C., more preferably 80 ° C. to 90 ° C.). Thereafter, this set temperature is preferably maintained until the polymerization is completed.
- the pressure in the reaction system can be set to any appropriate pressure as long as the effects of the present invention are not impaired.
- Examples of such pressure include normal pressure (atmospheric pressure), reduced pressure, and increased pressure.
- the atmosphere in the reaction system can be set to any appropriate atmosphere as long as the effects of the present invention are not impaired.
- examples of such an atmosphere include an air atmosphere and an inert gas atmosphere.
- the monomer polymerization reaction is preferably performed under acidic conditions.
- an increase in the viscosity of the solution in the polymerization reaction system can be suppressed, and a low molecular weight (meth) acrylic acid copolymer can be produced satisfactorily.
- the polymerization reaction can proceed under a higher concentration condition than before, the production efficiency can be significantly increased. For example, by adjusting the degree of neutralization during polymerization within the range of 0 to 25 mol%, the effect of reducing the amount of polymerization initiator can be increased synergistically, and the effect of reducing impurities can be significantly improved.
- the pH at 25 ° C. of the reaction solution during the polymerization within the range of 1 to 6.
- the polymerization can be carried out at a high concentration and in one stage. For this reason, it is also possible to omit the concentration step which was necessary in some cases in the conventional manufacturing method. Therefore, the productivity of the (meth) acrylic acid copolymer is greatly improved, and an increase in production cost can be suppressed.
- the pH of the reaction solution during polymerization at 25 ° C. is preferably within the range of 1 to 6, more preferably within the range of 1 to 5, and even more preferably within the range of 1 to 4.
- the pH of the reaction solution during polymerization at 25 ° C. is less than 1, for example, when bisulfite is used as an initiator system, sulfurous acid gas may be generated or the apparatus may be corroded.
- the pH at 25 ° C. of the reaction solution during polymerization exceeds 6, when bisulfite is used as an initiator system, the use efficiency of bisulfite may be lowered, and the molecular weight may be increased. There is.
- the above-described pH adjusting agent may be used.
- the degree of neutralization during polymerization is preferably in the range of 0 mol% to 25 mol%, more preferably in the range of 1 mol% to 20 mol%, and still more preferably in the range of 2 mol% to 15 mol%. If the degree of neutralization during polymerization is within such a range, the monomer can be copolymerized well, and impurities can be reduced. Further, the viscosity of the solution in the polymerization reaction system does not increase, and a low molecular weight copolymer can be produced satisfactorily. In addition, since the polymerization reaction can proceed under a higher concentration condition than before, the production efficiency can be significantly increased.
- any appropriate method can be adopted as the neutralization method as long as the effects of the present invention are not impaired.
- a salt of (meth) acrylic acid such as sodium (meth) acrylate may be used as a part of the raw material, and an alkali metal hydroxide such as sodium hydroxide is used as a neutralizing agent. You may neutralize during superposition
- the neutralizing agent may be added in a solid form or may be added in an aqueous solution dissolved in an appropriate solvent (preferably water).
- the concentration of the aqueous solution when the polymerization reaction is performed in the form of an aqueous solution is preferably 10% by mass to 60% by mass, more preferably 20% by mass to 55% by mass, and further preferably 30% by mass to 50% by mass. It is. When the concentration of the aqueous solution is less than 10% by mass, transportation and storage may be complicated. When the concentration of the aqueous solution exceeds 60% by mass, handling may be difficult.
- a monomer, a polymerization initiator, a chain transfer agent, and, if necessary, other additives are previously added to an appropriate solvent (preferably the same type of solvent as the liquid to be dropped). Dissolve the monomer solution, the polymerization initiator solution, the chain transfer agent solution, and, if necessary, other additive solutions. It is preferable to perform polymerization while continuously dropping over a predetermined dropping time. Further, a part of the solvent may be dropped later, separately from the initially charged solvent prepared in advance in a container in the reaction system. Regarding the dropping method, it may be dropped continuously, or may be dropped intermittently in several portions. In addition, one or two or more of the monomers may be initially charged.
- the dropping rate of one or more monomers may be always constant from the start to the end of dropping, or the dropping rate may be changed over time according to the polymerization temperature or the like. Moreover, it is not necessary to drop all the dropping components in the same manner, and the starting time and the ending time may be shifted for each dropping component, or the dropping time may be shortened or extended.
- the added solution may be heated to the same level as the polymerization temperature in the reaction system. In this way, when the polymerization temperature is kept constant, temperature fluctuation is reduced and temperature adjustment is easy.
- bisulfite When bisulfite is used as the initiator system, the weight average molecular weight of the copolymer at the initial stage of polymerization affects the final weight average molecular weight of bisulfite. For this reason, in order to reduce the weight average molecular weight of the copolymer at the initial stage of polymerization, bisulfite or a solution thereof is preferably within 60 minutes, more preferably within 30 minutes, and even more preferably from the start of polymerization. It is preferable to add (drop) 5 mass% to 35 mass% within 10 minutes.
- the completion time of addition of bisulfite or a solution thereof is preferably 1 to 30 minutes, more preferably 1 to 20 minutes, compared to the completion time of addition of the monomer. More preferably, it is accelerated by 1 to 15 minutes. As a result, the amount of bisulfite remaining after the completion of the polymerization can be reduced, and generation of sulfurous acid gas and formation of impurities due to such residual bisulfite can be effectively and effectively suppressed.
- the dropping end time of the persulfate or a solution thereof is preferably 1 minute to 60 minutes, more preferably 1 minute to 45 minutes, than the dropping end time of the monomer. Further, it is preferable to delay by 1 to 20 minutes. Thereby, the quantity of the monomer which remains after completion
- the total dropping time during polymerization is preferably 150 to 600 minutes, more preferably 180 to 450 minutes, and further preferably 210 to 300 minutes.
- the total dropping time is less than 150 minutes, the weight average molecular weight of the resulting (meth) acrylic acid copolymer may be too high. Further, excessive bisulfite may be decomposed to generate sulfurous acid gas.
- the productivity of the resulting (meth) acrylic acid copolymer may be lowered.
- the total dropping time here refers to the time from the start of dropping the first dropping component (not necessarily one component) to the completion of dropping the last dropping component (not necessarily one component).
- the solid content concentration in the polymerization solution is preferably 35% by mass or more, more preferably 40% by mass to 70% by mass, and further preferably 45% by mass to 65% by mass. It is. If the solid content concentration in the polymerization solution at the end of the polymerization reaction is 35% by mass or more, the polymerization can be performed at a high concentration and in one step. Therefore, a low molecular weight (meth) acrylic acid copolymer can be obtained efficiently. For example, it is possible to omit the concentration step that is necessary in some cases in the conventional manufacturing method, and to increase the manufacturing efficiency. As a result, the productivity of the (meth) acrylic acid copolymer is improved, and an increase in manufacturing cost can be suppressed.
- the time point at which the polymerization reaction is completed may be a time point at which the dropping of all the dropping components is completed, but preferably, a time point at which a predetermined aging time has elapsed (a time point at which the polymerization is completed). means.
- an aging step for aging the polymerization reaction solution may be provided after the polymerization reaction is completed in order to effectively complete the polymerization.
- the aging time in the aging step is preferably from 1 minute to 120 minutes, more preferably from 5 minutes to 90 minutes, and further preferably from 10 minutes to 60 minutes, from the viewpoint of effectively completing the polymerization.
- Preferably said polymerization temperature is applied.
- the polymerization time means the above total dropping time + aging time.
- the (meth) acrylic acid copolymer of the present invention or the (meth) acrylic acid copolymer obtained by the production method of the present invention includes, for example, a water treatment agent, a fiber treatment agent, a dispersant, and a scale inhibitor. (Scale inhibitor), metal ion sealant, thickener, various binders, emulsifiers, skin care agents, hair care agents and the like.
- Example 1 In a 2.5 L kettle made of SUS316 equipped with a thermometer, a reflux condenser, and a stirrer, 38.9 g of pure water and 0.0176 g of molle salt (where the total amount of iron (II) relative to the total amount charged) Is the total amount of charged substances including the neutralization step after the completion of the polymerization. The same applies hereinafter.) 3 ppm) was added, and the temperature was raised to 85 ° C. with stirring (initial charge).
- 80% AA an 80% by weight aqueous acrylic acid solution
- 80% AA 35% 2-acrylamido-2-methylpropanesulfonic acid
- 35% AMPS 240.0 g, 1-allyloxy-3-butoxypropanediol (hereinafter also referred to as PAB) 14.0 g, 15 mass% aqueous sodium persulfate solution (hereinafter also referred to as 15% NaPS) 66.5 g 38.7 g of 35% by mass sodium bisulfite aqueous solution (hereinafter also referred to as 35% SBS) and 33.8 g of 48% sodium hydroxide aqueous solution (hereinafter also referred to as 48% NaOH) were dropped from separate dropping nozzles.
- PAB 1-allyloxy-3-butoxypropanediol
- NaPS 15 mass% aqueous sodium persulfate solution
- SBS sodium bisulfite aqueous solution
- 48% NaOH sodium hydroxide aqueous solution
- the dropping time was 80% AA for 180 minutes, 35% AMPS for 150 minutes, 15% NaPS for 210 minutes, 35% SBS for 175 minutes, and 48% NaOH for 150 minutes. Moreover, regarding the dripping start time, all the dropping liquids started dripping simultaneously. After completion of all the additions, the reaction solution was aged at 85 ° C. for another 30 minutes to complete the polymerization. Thereafter, 174.0 g of a 48% aqueous sodium hydroxide solution was added. Thus, a copolymer (1) having a weight average molecular weight Mw of 15000 was obtained. Details of reaction conditions and the like are shown in Table 1. Table 2 shows the evaluation results of the dispersibility of the hydrophobic particles.
- Example 2 A copolymer (2) having a weight average molecular weight Mw of 7100 was obtained in the same manner as in Example 1 except that the conditions described in Table 1 were used. Details of reaction conditions and the like are shown in Table 1. Table 2 shows the evaluation results of the dispersibility of the hydrophobic particles.
- Example 3 A copolymer (3) having a weight average molecular weight Mw of 12000 was obtained in the same manner as in Example 1 except that the conditions described in Table 1 were used. Details of reaction conditions and the like are shown in Table 1. Table 2 shows the evaluation results of the dispersibility of the hydrophobic particles.
- Example 4 A copolymer (4) having a weight average molecular weight Mw of 14000 was obtained in the same manner as in Example 1 except that the conditions described in Table 1 were used. Details of reaction conditions and the like are shown in Table 1. Table 2 shows the evaluation results of the dispersibility of the hydrophobic particles.
- Example 5 A copolymer (5) having a weight average molecular weight Mw of 31000 was obtained in the same manner as in Example 1 except that the conditions described in Table 1 were used. Details of reaction conditions and the like are shown in Table 1.
- Example 6 A copolymer (6) having a weight average molecular weight Mw of 50000 was obtained in the same manner as in Example 1 except that the conditions described in Table 1 were used. Details of reaction conditions and the like are shown in Table 1.
- Example 7 A copolymer (7) having a weight average molecular weight Mw of 170000 was obtained in the same manner as in Example 1 except that the conditions described in Table 1 were used. Details of reaction conditions and the like are shown in Table 1.
- Example 8 A copolymer (8) having a weight average molecular weight Mw of 13000 was obtained in the same manner as in Example 1 except that the conditions described in Table 1 were used. Details of reaction conditions and the like are shown in Table 1.
- Example 1 A copolymer (C1) having a weight average molecular weight Mw of 22,000 was obtained in the same manner as in Example 1 except that the conditions described in Table 1 were used. Details of reaction conditions and the like are shown in Table 1. Table 2 shows the evaluation results of the dispersibility of the hydrophobic particles.
- the (meth) acrylic acid copolymer of the present invention or the (meth) acrylic acid copolymer obtained by the production method of the present invention has a specific amount of sulfonic acid (salt).
- the structural unit derived from the group-containing monomer and the structural unit derived from the specific amount of (meth) acrylic acid (salt) the structural unit derived from the specific amount of ether bond-containing hydrophobic monomer is introduced to make the hydrophobic It was confirmed that the dispersibility of the conductive particles was improved.
- the (meth) acrylic acid copolymer of the present invention or the (meth) acrylic acid copolymer obtained by the production method of the present invention can be used for any appropriate application.
- examples of such applications include flocculants, thickeners, pressure-sensitive adhesives, adhesives, surface coating agents, inorganic fiber crosslinking agents, organic fiber crosslinking agents, and crosslinkable compositions.
- pigment dispersants includes pigment dispersants, heavy metal scavengers, scale inhibitors, metal surface treatment agents, dyeing aids, dye fixing agents, foam stabilizers, emulsion stabilizers, ink dye dispersants, aqueous ink stabilizers, pigment dispersions for paints Agent, paint thickener, pressure sensitive adhesive, paper adhesive, stick glue, medical adhesive, adhesive for adhesive patch, adhesive for cosmetic pack, filler dispersant for resin, hydrophilizing agent for resin, recording paper Coating agent, Surface treatment agent for inkjet paper, Dispersant for photosensitive resin, Antistatic agent, Moisturizer, Binder for fertilizer, Binder for pharmaceutical tablet, Resin compatibilizer, Photographic additive, Cosmetic preparation additive, Hairdressing aid, hair spray Additives, and the like sunscreen composition additives.
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Abstract
Description
一般式(1)で表されるエーテル結合含有疎水性モノマー(A)と、一般式(6)で表されるスルホン酸(塩)基含有モノマー(B)と、(メタ)アクリル酸(塩)(C)とを含む単量体を重合して、(メタ)アクリル酸系共重合体を製造する方法であって、
該モノマー(A)/該モノマー(B)/該(メタ)アクリル酸(塩)(C)の使用割合が、1質量%~20質量%/1質量%~50質量%/30質量%~98質量%である。
本発明の(メタ)アクリル酸系共重合体は、一般式(1)で表されるエーテル結合含有疎水性モノマー(A)由来の構造単位(a)1質量%~20質量%と、一般式(6)で表されるスルホン酸(塩)基含有モノマー(B)由来の構造単位(b)1質量%~50質量%と、(メタ)アクリル酸(塩)(C)由来の構造単位(c)30質量%~98質量%を含む。
本発明の(メタ)アクリル酸系共重合体の製造方法は、エーテル結合含有疎水性モノマー(A)と、スルホン酸(塩)基含有モノマー(B)と、(メタ)アクリル酸(塩)(C)とを含む単量体を重合して、(メタ)アクリル酸系共重合体を製造する方法であって、該モノマー(A)/該モノマー(B)/該(メタ)アクリル酸(塩)(C)の使用割合が、1質量%~20質量%/1質量%~50質量%/30質量%~98質量%である。
本発明の(メタ)アクリル酸系共重合体、あるいは、本発明の製造方法で得られる(メタ)アクリル酸系共重合体は、例えば、水処理剤、繊維処理剤、分散剤、スケール防止剤(スケール抑制剤)、金属イオン封止剤、増粘剤、各種バインダー、乳化剤、スキンケア剤、ヘアケア剤等として用いることができる。
アクリル酸(塩)の定量は、下記条件にて行った。
測定装置:Waters社製 AllianceHPLCシステム
検出器:UV検出器(200nm)
カラム:昭和電工株式会社製 SHODEX RSpak DE-413L
温度:40.0℃
溶離液:0.1%リン酸水溶液
流速:1.0ml/min
スルホン酸(塩)基含有モノマーおよびエーテル結合含有疎水性モノマーの定量は、下記条件にて行った。
測定装置:東ソー株式会社製 8020シリーズ
カラム:株式会社資生堂製 CAPCELL PAK C1 UG120
温度:40.0℃
溶離液:10mmol/Lリン酸水素二ナトリウム水溶液(リン酸でpH7に調整)/アセトニトリル=45/55(体積比)
流速:1.0ml/min
検出器:RI検出器
共重合体の重量平均分子量の測定は、下記条件にて行った。
装置:東ソー製 高速GPC装置(HLC-8320GPC)
検出器:RI検出器
カラム:昭和電工社製 SHODEX Asahipak GF-310-HQ, GF-710-HQ, GF-1G 7B
カラム温度:40℃
流速:0.5ml/min
検量線:創和科学株式会社製 POLYACRYLIC ACID STANDARD
溶離液:0.1N酢酸ナトリウム/アセトニトリル=3/1(質量比)
(1)20mLのスクリュー管に、各評価サンプルの固形分0.1%水溶液を10g作成した。
(2)一方で、1Lビーカーに、1%リン酸水溶液を1000g調整した。
(3)次いで、内径16mmの30mL試験管を評価サンプル数準備し、それぞれにタルク0.9gを秤りとり、これに(2)で作成した1%リン酸水溶液を29.4g投入した。
(4)(3)の試験管に、(1)のサンプル水溶液を0.6gずつ投入し、セプタムでキャップした。このようにして、各試験管中にタルク3%、サンプル固形分20ppmを含む懸濁水溶液を調製した。
(5)各試験管内で塊になっているタルクを軽く振ってほぐした後、試験管をゆっくり60往復反転させた。その後、キャップを外し、水平で安定した場所で、5分間静置し、5分後の上澄みを、ホールピペットを用いて5mL取った。
(6)この上澄みの380nmの吸光度を、島津製作所製の紫外可視分光光度計「UV-1800」を用いて測定した。この吸光度を分散能とした。この値が大きいほど分散能が高いことを意味する。
温度計、還流冷却器、攪拌機を備えたSUS316製の2.5L釜に、純水38.9gと、モール塩0.0176g(総仕込み量に対する鉄(II)の質量(ここで、総仕込み量とは、重合完結後の中和工程を含む、全ての投入物質量をいう。以下同様とする。)に換算すると3ppm)を仕込み、攪拌下、85℃に昇温した(初期仕込み)。
次いで、攪拌下、85℃で一定状態の重合反応系中に、80質量%アクリル酸水溶液(以下、80%AAとも称する)210.0g、35%2-アクリルアミド-2-メチルプロパンスルホン酸(以下、35%AMPSとも称する)240.0g、1-アリルオキシ-3-ブトキシプロパンジオール(以下、PABとも称する)14.0g、15質量%過硫酸ナトリウム水溶液(以下、15%NaPSとも称する)66.5g、35質量%重亜硫酸ナトリウム水溶液(以下、35%SBSとも称する)38.7g、48%水酸化ナトリウム水溶液(以下、48%NaOHとも称する)33.8gを、それぞれ別個の滴下ノズルより滴下した。それぞれの滴下時間は、80%AAを180分間、35%AMPSを150分間、15%NaPSを210分間、35%SBSを175分間、48%NaOHを150分間とした。また、滴下開始時間に関して、各滴下液はすべて同時に滴下を開始した。
すべての滴下終了後、さらに30分間に渡って反応溶液を85℃に保持して熟成し、重合を完結させた。
その後、48%水酸化ナトリウム水溶液174.0gを添加した。
このようにして、重量平均分子量Mwが15000の共重合体(1)を得た。
反応条件等の詳細を表1に示した。
また、疎水性粒子の分散能の評価結果を表2に示した。
なお、表1中の略号の意味は下記の通りである。
AA:アクリル酸
AMPS:2-アクリルアミド-2-メチルプロパンスルホン酸
PAB:1-アリルオキシ-3-ブトキシプロパン-2-オール
IPN-HxO:イソプレノールへのヘキセンオキサイド付加物
ArB:アリルブチルエーテル
NaPS:過硫酸ナトリウム
SBS:亜硫酸水素ナトリウム
NaOH:水酸化ナトリウム
表1に記載した条件とした以外は、実施例1と同様にして、重量平均分子量Mwが7100の共重合体(2)を得た。
反応条件等の詳細を表1に示した。
また、疎水性粒子の分散能の評価結果を表2に示した。
表1に記載した条件とした以外は、実施例1と同様にして、重量平均分子量Mwが12000の共重合体(3)を得た。
反応条件等の詳細を表1に示した。
また、疎水性粒子の分散能の評価結果を表2に示した。
表1に記載した条件とした以外は、実施例1と同様にして、重量平均分子量Mwが14000の共重合体(4)を得た。
反応条件等の詳細を表1に示した。
また、疎水性粒子の分散能の評価結果を表2に示した。
表1に記載した条件とした以外は、実施例1と同様にして、重量平均分子量Mwが31000の共重合体(5)を得た。
反応条件等の詳細を表1に示した。
表1に記載した条件とした以外は、実施例1と同様にして、重量平均分子量Mwが50000の共重合体(6)を得た。
反応条件等の詳細を表1に示した。
表1に記載した条件とした以外は、実施例1と同様にして、重量平均分子量Mwが170000の共重合体(7)を得た。
反応条件等の詳細を表1に示した。
表1に記載した条件とした以外は、実施例1と同様にして、重量平均分子量Mwが13000の共重合体(8)を得た。
反応条件等の詳細を表1に示した。
表1に記載した条件とした以外は、実施例1と同様にして、重量平均分子量Mwが22000の共重合体(C1)を得た。
反応条件等の詳細を表1に示した。
また、疎水性粒子の分散能の評価結果を表2に示した。
Claims (2)
- 一般式(1)で表されるエーテル結合含有疎水性モノマー(A)由来の構造単位(a)1質量%~20質量%と、一般式(6)で表されるスルホン酸(塩)基含有モノマー(B)由来の構造単位(b)1質量%~50質量%と、(メタ)アクリル酸(塩)(C)由来の構造単位(c)30質量%~98質量%を含む、(メタ)アクリル酸系共重合体。
- 一般式(1)で表されるエーテル結合含有疎水性モノマー(A)と、一般式(6)で表されるスルホン酸(塩)基含有モノマー(B)と、(メタ)アクリル酸(塩)(C)とを含む単量体を重合して、(メタ)アクリル酸系共重合体を製造する方法であって、
該モノマー(A)/該モノマー(B)/該(メタ)アクリル酸(塩)(C)の使用割合が、1質量%~20質量%/1質量%~50質量%/30質量%~98質量%である、
(メタ)アクリル酸系共重合体の製造方法。
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US14/900,353 US9428602B2 (en) | 2013-09-24 | 2014-09-11 | (Meth)acrylic acid copolymer and method for producing same |
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EP3310736B1 (de) | 2015-06-17 | 2019-01-30 | Clariant International Ltd | Wasserlösliche oder wasserquellbare polymere als wasserverlustreduzierer in zementschlämmen |
CN110300573B (zh) | 2016-12-12 | 2023-07-25 | 科莱恩国际有限公司 | 生物基聚合物在化妆、皮肤病学或药物学组合物中的用途 |
WO2018108609A1 (en) | 2016-12-12 | 2018-06-21 | Clariant International Ltd | Polymer comprising certain level of bio-based carbon |
WO2018108664A1 (en) | 2016-12-15 | 2018-06-21 | Clariant International Ltd | Water-soluble and/or water-swellable hybrid polymer |
US11542343B2 (en) | 2016-12-15 | 2023-01-03 | Clariant International Ltd | Water-soluble and/or water-swellable hybrid polymer |
EP3554646A1 (en) | 2016-12-15 | 2019-10-23 | Clariant International Ltd | Water-soluble and/or water-swellable hybrid polymer |
US11401362B2 (en) | 2016-12-15 | 2022-08-02 | Clariant International Ltd | Water-soluble and/or water-swellable hybrid polymer |
CN106674411A (zh) * | 2017-01-12 | 2017-05-17 | 浙江万里学院 | 一种高吸水性树脂的合成方法 |
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US20160194423A1 (en) | 2016-07-07 |
US9428602B2 (en) | 2016-08-30 |
DE112014004369B4 (de) | 2021-05-06 |
DE112014004369T5 (de) | 2016-06-02 |
JPWO2015045883A1 (ja) | 2017-03-09 |
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