WO2001058579A1 - Composition de dispersion - Google Patents

Composition de dispersion Download PDF

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Publication number
WO2001058579A1
WO2001058579A1 PCT/US2001/003058 US0103058W WO0158579A1 WO 2001058579 A1 WO2001058579 A1 WO 2001058579A1 US 0103058 W US0103058 W US 0103058W WO 0158579 A1 WO0158579 A1 WO 0158579A1
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group
dispersant composition
monomer
groups
polyalkylene oxide
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PCT/US2001/003058
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English (en)
Inventor
Toshitaka Tsuzuki
Akitaka Miyata
Shiho Naruse
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National Starch And Chemical Investment Holding Corporation
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Priority to EP01905243A priority Critical patent/EP1409121A1/fr
Priority to US10/182,474 priority patent/US20030209695A1/en
Priority to AU2001233145A priority patent/AU2001233145A1/en
Publication of WO2001058579A1 publication Critical patent/WO2001058579A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
    • C09K23/42—Ethers, e.g. polyglycol ethers of alcohols or phenols
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/16—Sulfur-containing compounds
    • C04B24/161—Macromolecular compounds comprising sulfonate or sulfate groups
    • C04B24/163—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/165—Macromolecular compounds comprising sulfonate or sulfate groups obtained by reactions only involving carbon-to-carbon unsaturated bonds containing polyether side chains
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/243—Phosphorus-containing polymers
    • C04B24/246—Phosphorus-containing polymers containing polyether side chains
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/2641—Polyacrylates; Polymethacrylates
    • C04B24/2647—Polyacrylates; Polymethacrylates containing polyether side chains
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/2652—Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles
    • C04B24/2658—Nitrogen containing polymers, e.g. polyacrylamides, polyacrylonitriles containing polyether side chains
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/2664—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of ethylenically unsaturated dicarboxylic acid polymers, e.g. maleic anhydride copolymers
    • C04B24/267—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of ethylenically unsaturated dicarboxylic acid polymers, e.g. maleic anhydride copolymers containing polyether side chains
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
    • C04B24/24—Macromolecular compounds
    • C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B24/2688—Copolymers containing at least three different monomers
    • C04B24/2694—Copolymers containing at least three different monomers containing polyether side chains
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
    • C09K23/14—Derivatives of phosphoric acid
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
    • C09K23/16—Amines or polyamines
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/40—Surface-active agents, dispersants
    • C04B2103/408—Dispersants

Definitions

  • the present invention is intended to provide a novel dispersant composition for dispersing an inorganic substance in water, and particularly concerns a novel dispersant composition for an inorganic substance, which makes it possible for an inorganic pigment, such as titanium dioxide, calcium carbonate and clay, and a hydraulic material, such as calcined calcium sulfate and cement, to have improved dispersing property and dispersing stability to water
  • the inorganic substance includes an inorganic pigment such as titanium dioxide, calcium carbonate and clay and a hydraulic material such as calcined calcium sulfate and cement
  • a dispersant composition containing carboxyhc acid and/or carboxylate has been proposed (see JP No 38095/1978 (Tokukoushou 53-38095), and JP No 19643/1988 (Tokukoushou 63-19643))
  • this dispersant composition particles of an inorganic substance aie dispersed in water effectively in the following manner
  • one portion of carboxyl gioups of the dispersant composition is allowed to adhere to the surface of each particle of the inorganic substance
  • the carboxyl group has a negative ionic property, and is negatively charged Therefore, since other carboxyl groups which have not contributed to the adhesion are elect ⁇ cally repulsive from each other so that the particles of the inorganic substance are dispersed in water
  • the setting time of the hydraulic material becomes longer means that the setting of the hydraulic material, exerted by a reaction with water, becomes longer due to the addition of the dispersant composition
  • the dispersing property of the inorganic substance refers to a characteristic in which an inorganic substance is uniformly suspended in a medium in a liquid phase without generating coagulation, and the characteristic of the dispersant composition for improving the dispersing property of the inorganic substance is also referred to as "the dispersing property of the dispersant composition"
  • the dispersing stability of an inorganic substance refers to the fact that the dispersing property of the inorganic substance is hardly reduced even after a long period of time by adding dispersant composition, and the characteristic of the dispersant composition for improving the dispersing stability of the inorganic substance is also referred to as “the dispersing stability of the dispersant composition.”
  • JP No. 38380/1983 discloses a dispersant composition in which a copolymer obtained from polyethylene oxide monoallyl ether and a maleic acid-based monomer is used as a main component of the dispersant composition for hydraulic materials.
  • JP No. 18338/1984 discloses a dispersant composition in which a copolymer, obtained from polyalkylene oxide mono(meth)acrylate, a (meth)acrylic acid-based monomer and a monomer copolymerizable with these monomers, is used as a main component of the dispersant composition for hydraulic materials.
  • copolymers have a non-ionic hydrophilic group called polyalkylene oxide chain as well as an anionic hydrophilic group called carboxyl group in their molecules. It has been reported that when a dispersant composition using each of these copolymers is adopted, the dispersing property of the hydraulic material to be dispersed is improved with less susceptibility to a prolonged setting time of the hydraulic material, as compared with the above-mentioned dispersant composition containing carboxylic acid and/or carboxylate.
  • the present invention has been devised to solve the above-mentioned problems, and its objective is to provide a novel dispersant composition for an inorganic substance, which is used for dispersing the inorganic substance in water, which makes it possible for an inorganic pigment, such as titanium dioxide, calcium carbonate and clay, and a hydraulic material, such as calcined calcium sulfate and cement, to improve at least one of the dispersing property and dispersing stability to water, and which can alleviate or virtually solve the problem of giving adverse effects on the other properties.
  • an inorganic pigment such as titanium dioxide, calcium carbonate and clay
  • a hydraulic material such as calcined calcium sulfate and cement
  • a dispersant composition which contains a polymer containing polyalkylene oxide groups, and also containing anionic groups as well as cationic groups, can solve the above-mentioned problems, and have completed the present invention.
  • a particle of an inorganic substance has a charge on its surface. It is considered that the charge on the surface of the particle is either a positive charge, a negative charge, or zero, from the viewpoint of the particle as a whole. However, taking into consideration charges at respective parts of the surface with respect to the actual surface of the particle, it is considered that positive and negative charges are located in a mixed manner. Therefore, the sum of these charges are supposed to form a charge of the particle as a whole, and the distribution of charges on the surface of the particle assumes a very complex state.
  • the polymer which is a component of the dispersant composition, needs to possess cationic and anionic groups at the same time, and the ratio of these numbers (the number of cationic groups/the number of anionic groups) needs to be readily changed in accordance with the conditions of the surface of particles of the inorganic substance.
  • a dispersant composition which contains a polymer having, as its main component, three kinds of functional groups, that is, polyalkylene oxide groups, anionic groups and cationic groups, exerts superior effects, and have completed the present invention.
  • One embodiment of the present invention provides a novel dispersant composition for inorganic substances, which is used in the presence of an aqueous solvent, and contains a polymer containing polyalkylene oxide groups, the polyalkylene oxide group being represented by formula (I):
  • R 1 represents an ethylene group or a propylene group
  • R represents an alkyl group having carbon atoms of 1 to 20, which may contain hydrogen or a substitute group, and n is an integer in the range of 1 to 300], wherein polymer containing polyalkylene oxide groups further contains anionic groups and cationic groups
  • the dispersant composition of the present invention is preferably used as a dispersant composition for an inorganic substance in water, such as an inorganic pigment such as titanium oxide, calcium carbonate and clay, and a hydraulic material such as calcined calcium sulfate and cement
  • the aqueous solvent may be so-called water such as ion exchange water, distilled water and pure water, and "the aqueous solvent” also includes water approp ⁇ ately having a water-soluble solvent (for example, acetone and lower alcohol, etc ), however, water is more preferable
  • polymer containing polyalkylene oxide groups refers to a main component of a dispersant composition, which imparts to the dispersant composition a function for improving the dispersing property of an inorganic substance
  • the polyalkylene oxide group refers to a functional group repiesented by formula (I)
  • R represents an ethylene group or a propylene group
  • R" represents an alkyl group having carbon atoms of 1 to 20, which may contain hydrogen oi a substitute group, and n is an integer in the range of 1 to 300].
  • the ethylene group or propylene group represented by R specifically refers to -CH CH 2 -, -CH(CH 3 )-CH 2 -, or -CH CH 2 CH 2 -, and in particular, the ethylene group (-CH 2 CH -) is preferably used.
  • the alkyl group having carbon atoms of 1 to 20, which may contain hydrogen or a substitute group represented by R 2
  • examples thereof include hydrogen, a methyl group, an ethyl group, a dodecyl group and an octadecyl group, and a methyl group is preferably used.
  • n is an integer in the range of 1 to 300, more preferably, 5 to 100, and most preferably, 8 to 50.
  • the polymer containing polyalkylene oxide groups can also contain the above- mentioned polyalkylene oxide group alone or in combination thereof.
  • the anionic group of the present invention refers to a functional group having a negative charge (for example, -COO-, -SO 3 -, etc.) (including a functional group whose negative charge is electrically neutralized by a paired cation (for example, -COO-Na + , -SO 3 -K + , etc.)) and a functional group capable of forming a functional group having a negative charge by releasing a hydrogen ion in water (for example, -COOH, -SO 3 H, etc.).
  • a functional group having a negative charge for example, -COO-, -SO 3 -, etc.
  • a functional group having a negative charge for example, -COO-, -SO 3 -, etc.
  • the functional group having a negative charge and "the functional group capable of forming a functional group having a negative charge by releasing a hydrogen ion in water”, it is taken for granted that they are respectively exchangeable easily, for example, by changing the ambient conditions of the respective functional groups, such as pH and concentration.
  • the anionic groups of the present invention, these functional groups may be used alone or in combination thereof in accordance with the properties of the dispersant composition to be obtained.
  • the functional group having a negative charge includes a functional group whose negative charge is electrically neutralized by a paired cation
  • examples thereof include: carboxylate groups (-COO- and -COOM 1 ), sulfonate groups (-SO 3 " and SO 3 M 2 ), and phosphate groups (-PO4H “ , -PO 4 2" , and -PO 4 M 3 M 4 ) [in which M 1 , M 2 , M 3 and M 4 are alkali metal, alkali earth metal or ammonium. (Here, either of M 3 and M 4 may be hydrogen)].
  • the functional group capable of forming a functional group having a negative charge by releasing a hydrogen ion in water examples thereof include: a carboxyl group (-COOH), a sulfonic acid group (-SO 3 H) and a phosphoric acid group (-PO 4 H 2 ).
  • the polymer containing polyalkylene oxide groups in accordance with the present invention, its anionic group is at least one member preferably selected from the group consisting of a carboxyl group, a sulfonic acid group, a phosphoric acid group, a carboxylate group, a sulfonate group and a phosphate group.
  • polymer containing polyalkylene oxide groups may contain an anionic group alone or in combination thereof.
  • the cationic group of the present invention refers to a functional group having a positive charge (for example, -N + (CH 3 ) 3 and -C 6 H 4 N + -CH 3 )(including a functional group that is electrically neutralized by a paired anion (for example, - N + (CH 3 ) 3 CI " and -C 6 H 4 N + -CH 3 Br-, etc.)), and includes a functional group capable of forming a functional group having a positive charge by receiving a hydrogen ion in water (for example, -N(CH 3 ) 2 and -C ⁇ H N).
  • the functional group having a positive charge and "the functional group capable of forming a functional group having a positive charge by receiving a hydrogen ion in water”, it is taken for granted that they are respectively exchangeable easily, for example, by changing the ambient conditions of the respective functional groups, such as pH and concentration.
  • the cationic group of the present invention, these functional groups may be used alone or in combination thereof in accordance with the properties of the dispersant composition to be obtained.
  • the functional group having a positive charge examples thereof include an ammonium base
  • R 3 , R 4 , R 5 and R° represent a hydrogen atom, a methyl group, an ethyl group, a benzyl group, a phenyl group or a methylphenyl group
  • X " is a halogen ion such as a chlorine ion and a bromine ion, an acetic acid ion [CH 3 COO ], a methylsulfate ion [CH 3 SO 4 " ], an ethylsulfate ion[C 2 H 5 SO ⁇ ], a p-toluenesulfonate ion [CH 3 C 6 H 4 SO 3 " ], etc.
  • the functional group capable of forming a functional group having a positive charge by receiving a hydrogen ion in water examples thereof include an amino group (-N R 7 R 8 ) [in which R 7 and R 8 represent a hydrogen atom, a methyl group, an ethyl group, a benzyl group, a phenyl group or a methylphenyl group] and a pyridyl group (-C 6 H 4 N).
  • the polymer containing polyalkylene oxide groups it is preferable that its cationic group is at least one member selected from the group consisting of an amino group and an ammonium base.
  • a tertiary amino group and a quaternary ammonium base are preferably used.
  • R 3 , R 4 , R 5 and R 6 are hydrogen atoms, and they are preferably selected from a methyl group, an ethyl group, a benzyl group, a phenyl group and a methylphenyl group.
  • the polymer containing polyalkylene oxide groups may contain a cationic group alone or in combination thereof.
  • the physical properties of “the polymer containing polyalkylene oxide groups” may be appropriately selected depending on the properties of the dispersant composition for inorganic substances to be obtained; and the weight average molecular weight thereof is preferably set in the range of 1,000 to 200,000, more preferably, 5,000 to 50,000, and most preferably, 8,000 to 40,000.
  • the polymer containing polyalkylene oxide groups has its ratio of the number of anionic groups and that of cationic groups (anionic groups/cationic groups) set in the range of 30/70 to 99.5/0.5, more preferably, 50/50 to 99.5/0.5, and most preferably, 80/20 to 99/1.
  • the polymer containing polyalkylene oxide groups has its ratio of the number of polyalkylene oxide groups and the sum of the numbers of cationic groups and anionic groups (the number of polyalkylene oxide group/ (the number of cationic groups + the number of anionic groups)), is preferably set in the range of 10/90 to 50/50, more preferably, 15/85 to 45/55, and most preferably, 20/80 to 40/60.
  • Each of the above-mentioned polyalkylene oxide group, anionic group and cationic group is preferably given as a side chain of "the polymer containing polyalkylene oxide groups".
  • the ratio of the number of anionic groups and the number of cationic groups, as well as the ratio of the number of polyalkylene oxide groups and the sum of the numbers of cationic groups and anionic groups is in general virtually the same as a value calculated based upon the number of anionic groups, the number of cationic groups and the number of polyalkylene oxide groups that are contained in a mixture of monomers used for preparing a polymer containing polyalkylene oxide groups, as will be described later.
  • the polymer containing polyalkylene oxide groups is obtained by polymerizing a monomer mixture consisting of: (A) a monomer having an a iionic group and a double bond between carbon atoms;
  • R 1 represents an ethylene group or a propylene group
  • R " represents an alkyl group having carbon atoms of 1 to 20, which may contain hydrogen or a substitute group, and n is an integer in the range of 1 to 300].
  • (A) a monomer having an anionic group and a double bond between carbons (hereinafter, referred to as "monomer (A)")” refers to a monomer which supplies an anionic group to a polymer containing polyalkylene oxide groups through a polymerization reaction (addition polymerization or radical polymerization).
  • “Anionic group” refers to the above-mentioned anionic group, which includes "a functional group having a negative charge (including a functional group that is electrically neutralized by a paired cation)" and "a functional group capable of forming a functional group having a negative charge by releasing a hydrogen ion in water”. Therefore, with respect to the anionic group, examples thereof include a carboxyl group, a sulfonic acid group, a phosphoric acid group, a carboxylate group, a sulfonate group and phosphate group.
  • the carboxyl group contained in monomer (A) also includes a carboxylic anhydride.
  • acrylic acid and methacrylic acid are collectively referred to as "(meth)acrylic acid”; acrylic acid ester and methacrylic acid ester are collectively referred to as “(meth)acrylic acid ester” or "(meth)acrylate”.
  • (meth)acrylic acid acrylic acid ester and methacrylic acid ester
  • (meth)acrylate acrylic acid ester and methacrylic acid ester
  • monomer (A) have take any of the combinations of the above- mentioned anionic groups and double bonds between carbon atoms, as long as it does not give any adverse effect on the properties of the resulting "polymer containing polyalkylene oxide groups", and it is not intended to be limited by the number of anionic groups contained therein and the number of double bonds between carbon atoms.
  • Monomer (A) preferably contains as an anionic group at least one member selected from the group consisting of a carboxyl group, a sulfonic acid group, a phosphoric acid group, a carboxylate group, a sulfonate group and a phosphate group.
  • monomer (A) containing at least one member selected from a carboxyl group and a carboxylate group examples thereof include compounds that contain at least one member selected from a carboxyl group and a carboxylate group and that has a double bond between carbon atoms, such as:
  • monomer (A) containing at least one member selected from a sulfonic acid group and a sulfonate group examples thereof include compounds that contain at least one member selected from a sulfonic acid group and a sulfonate group and that has a double bond between carbon atoms, such as: vinylsulfonate, styrenesulfonate, (meth)allylsulfonate, (meth)allyloxybenzenesulfonate, 2-acrylamide-2-methylpropanesulfonate, 2- sulfoxyefhyl(meth)acrylate, sodium salts of these and ammonium salts of these.
  • a monomer (A) containing at least one kind of a phosphoric acid group and a phosphate group examples thereof include a compound having at least one kind of phosphoric acid group and a phosphate group with a double bond between carbon atoms, such as 2-(meth)acroyloxyethyl acid phosphate.
  • These monomers (A) may be used alone or in combination thereof.
  • (B) a monomer having a cationic group and a double bond between carbon atoms
  • monomer (B) refers to a monomer which supplies a cationic group to a "polymer containing polyalkylene oxide groups” through a polymerization reaction (addition polymerization or radical polymerization).
  • “Cationic group” refers to the above-mentioned cationic group, which includes "a functional group having a positive charge (including a functional group that is electrically neutralized by a paired anion)" and "a functional group capable of fo ⁇ ning a functional group having a positive charge by receiving a hydrogen ion in water”. Therefore, with respect to the cationic group, examples thereof include an amino group, a pyridyl group, an ammonium base, and a pyridylium base.
  • double bond between carbon atoms refers to the above-mentioned double bond between carbon atoms.
  • Monomer (B) may have any of the combinations of the above-mentioned cationic groups and double bonds between carbon atoms, as long as it does not give any adverse effect on the properties of the resulting polymer containing polyalkylene oxide groups, and it is not intended to be limited by the number of cationic groups contained therein and the number of double bonds between carbon atoms.
  • Monomer (B) preferably contains at least one member selected from the group consisting of an amino group and an ammonium base as the cationic group.
  • Examples of monomer (B) include: compounds having a primary amino group and a double bond between carbon atoms, such as allylamine; compounds having a tertiary amino group and a double bond between carbon atoms, such as -(N,N-dialkylamino)alkyl(meth)acrylamide, for example, 3-(N,N- dimethylamino)propyl(meth)acrylamide, and -(N, N-dialkylamino)alkyl(meth)acrylate, for example, 2-(N,N-dimethylamino)ethyl(meth)acrylate and 2-(N,N- diethylamino)ethyl(meth)acrylate; compounds having a quaternary ammonium base in which the tertiary amino group of-(N,N-dialkylamino)alkyl(meth)acrylamide, such as 3-(N,N- dimethylamino)propyl(meth)acrylamide, is further alky
  • monomer (B) a compound having a primary amino group and a double bond between carbon atoms, a monomer having a tertiary amino group and a double bond between carbon atoms and a monomer having a quaternary ammonium base and a double bond between carbon atoms are preferably used.
  • monomer (B) in particular, a monomer having a tertiary amino group and a double bond between carbon atoms and a monomer having a quaternary ammonium base and a double bond between carbon atoms are more preferably used.
  • monomers (B) may be used alone or in combination thereof.
  • a monomer containing a polyalkylene group hereinafter, referred to as "monomer (C)"
  • (C) a monomer having a polyalkylene oxide group and a double bond between carbon atoms, the polyalkylene oxide group being represented by formula (I)
  • R represents an ethylene group or a propylene group
  • R 2 represents an alkyl group having carbon atoms of 1 to 20, which may contain hydrogen or a substitute group, and n is an integer in the range of 1 to 300], is allowed to provide a polymer containing polyalkylene oxide groups by a polymerization reaction (addition polymerization or radical polymerization), the polyalkylene oxide group being represented by formula (I)
  • the polyalkylene oxide group represented by formula (1) lefers to the above- mentioned polyalkylene oxide group, and R 1 , R 2 and n refer to the above-mentioned R 1 , R " and n
  • double bond between carbon atoms refers to the above-mentioned double bond between carbon atoms
  • monomer (C) may have any of the combinations of the above- mentioned polyalkylene oxide groups and double bonds between caibon atoms, as long as it does not give any adverse effect on the properties of "the polymer containing polyalkylene oxide groups", and it is not intended to be limited by the number of polyalkylene oxide groups contained therein and the number of double bonds between carbon atoms
  • Examples of such a monomer (C) include polyalkylene ox ⁇ de(meth)acryhc acid esters, such as polyethylene oxide(mefh)acrylic acid ester, methoxypolyethylene ox ⁇ de(meth)acryhc acid ester, polypropylene ox ⁇ de(meth)acryhc acid ester, and methoxypolypropylene oxide(meth)acryhc acid ester; polyalkylene oxide monoallyl ethers, such as polyethylene oxide monoallyl ether, methoxypolyethylene oxide monoallyl ether, polypropylene oxide monoallyl ether, and methoxypolypropylene oxide monoallyl ether; maleic acid polyalkylene oxide diesters, such as maleic acid monomethoxypolyethylene oxide diester, and maleic acid monomethoxypolypropylene oxide diester, and itaconic acid polyalkylene oxide diesters, such as itaconic acid monomethoxypoly
  • polyalkylene ox ⁇ de(meth)acryhc acid esters and polyalkylene oxide monoallyl ethers are preferably used.
  • These monomers (C) may be used alone or in combination thereof
  • the polymer containing polyalkylene oxide groups in accordance with the present invention is obtained by polymerizing a monomer mixture containing monomer (A), monomer (B) and monomer (C), as well as (D) a monomer which contains a polyalkylene oxide group and a double bond between carbon atoms and also has at least one member selected from the group consisting of an anionic group and a cationic group (hereinafter, also referred to as "monomer (D)”)
  • a monomer containing a polyalkylene oxide group a double bond between carbon atoms and an anionic group, which is one kind of monomer (D)
  • examples thereof include maleic acid polyalkylene oxide half esters, such as maleic acid monomethoxypolyethylene oxide half ester and maleic acid monomethoxypolypropylene oxide half ester; and itaconic acid polyalkylene oxide half esters, such as itaconic acid monomethoxypolyethylene oxide half ester and itaconic acid monomethoxypolypropylene oxide half ester.
  • These monomers (D) may be used alone, or in combination thereof.
  • the polymer containing polyalkylene oxide groups in accordance with the present invention is obtained by polymerizing a monomer mixture which contains monomer (A), monomer (B) and monomer (C), as well as a monomer (D), if necessary, and also contains (E) a monomer having an anionic group, a cationic group and a double bond between carbon atoms (hereinafter, also referred to as “monomer (E)").
  • Monomer (E) may be used as all or a part of monomer (A) and monomer (B).
  • a compound which is a so-called betaine having a double bond between carbon atoms may be used as monomer (E).
  • the polymer containing polyalkylene oxide groups in accordance with the present invention is obtained by p olvmerizing a monomer mixture which contains monomer (A), monomer (B) and monomer (C), as well as a monomer (D), if necessary, and also contains monomer (E), if necessary, as well as (F) another monomer having a double bond between carbon atoms (hereinafter, also referred to as "monomer (F)").
  • “Monomer (F)” is a monomer having a double bond between carbon atoms, which is neither monomer (A), monomer (B), monomer (C), monomer (D), nor monomer (E), and which is copolymerizable (addition polymerization or radical polymerization) with monomer (A), monomer (B) and monomer (C); and is not particularly limited as long as it does not give any adverse effects on the polymerization reaction and the properties of the polymer having polyalkylene oxide groups.
  • Examples of these monomers (F) include:
  • (FI) (me h)acrylic acid alkyl esters such as mefhyl(mefh)acrylate, ethyl(meth)acrylate, propyl(meth)acrylate, butyl(meth)acrylate, hexyl(mefh)acrylate, octyl(meth)acrylate, 2-efhylhexyl(mefh)acrylate, decyl(meth)acrylate and dodecyl(meth)acrylate;
  • (F2) (meth)acrylic acid hydroxyalkyl esters, such as hydroxyethyl(meth)acrylate and hydroxypropyl(meth)acrylate;
  • (F3) (meth)acrylic acid amides, such as (meth)acrylic acid amide and (meth)acrylic acid methylol amide;
  • (F6) alkenes such as ethylene and propylene, and dienes such as butadiene and isoprene;
  • These monomers (F) may be used alone, or in combination thereof.
  • the ratio of the number of anionic groups and the number of cationic groups (anionic groups/cationic groups) contained in a monomer mixture used for obtaining "a polymer containing polyalkylene oxide groups", (contained in its monomer (A), monomer (B), and monomer (D) added, if necessary, and monomer (E) added, if necessary) is preferably set in the range of 30/70 to 99.5/0.5, more preferably, 50/50 to 99.5/0.5, and most preferably, 80/20 to 99/1.
  • the amounts of monomer (A), monomer (B), monomer (D) added, if necessary, and monomer (E) further added, if necessary, are preferably set so as to satisfy such a ratio of the number of anionic groups and the number of cationic groups. Moreover, in the case when none of monomer (D) and monomer (E) are used, the amounts of monomer (A) and monomer (B) are preferably set so as to satisfy the ratio of the number of anionic groups and cationic groups.
  • the ratio of the number of anionic groups and the number of cationic groups (anionic groups/cationic groups) contained in a monomer mixture is virtually the same as the ratio of the number of anionic groups and the number of cationic groups (anionic groups/cationic groups) that are contained in "a polymer containing polyalkylene oxide groups.”
  • the ratio of the number of polyalkylene oxide groups and the sum of the numbers of cationic groups and anionic groups (that is, the number of polyalkylene oxide groups/(the number of cationic groups + the number of anionic groups)) contained in a monomer mixture used for obtaining "a polymer containing polyalkylene oxide groups", (contained in its monomer (A), monomer (B), monomer (C) and monomer (D) added, if necessary, and monomer (E) further added, if necessary) is preferably set in the range of 10/90 to 50/50, more preferably, 15/85 to 45/55, and most preferably, 20/80 to 40/60.
  • the amounts of monomer (A), monomer (B), monomer (C), monomer (D) added, if necessary, and monomer (E) further added, if necessary, are preferably set so as to satisfy such a ratio of the number of polyalkylene oxide groups and the sum of the numbers of cationic groups and anionic groups.
  • the amounts of monomer (A), monomer (B) and monomer (C) are preferably set so as to satisfy the ratio of the number of alkylene oxide groups and the sum of the numbers of cationic groups and anionic groups.
  • the ratio of the number of aforementioned polyalkylene oxide groups and the sum of the numbers of cationic groups and anionic groups (the number of polyalkylene oxide groups/ (the number of cationic groups + the number of anionic groups)), which are contained in a monomer mixture is virtually the same as the ratio of the number of polyalkylene oxide groups and the sum of the numbers of anionic groups and the number of cationic groups (the number of polyalkylene oxide groups/ (the number of cationic groups + the number of anionic groups)), which are contained in "a polymer containing polyalkylene oxide groups.”
  • monomer (C) it is preferable for monomer (C) to be contained in the monomer mixture (100% by weight) used for obtaining a polymer containing polyalkylene oxide groups in the range of 50 to 95% by weight, more preferably, 70 to 92% by weight, and most preferably, 80 to 90% by weight.
  • the amount of monomer (F) in the range of 0 to 20 parts by weight when it is added to the sum of the above-mentioned monomer (A), monomer (B), monomer (C), monomer (D) added, if necessary, and monomer (E) further added, if necessary, that is, ((A) + (B) + (C) + (D) + (E)) of 100 parts by weight, more preferably, 0 to 15 parts by weight, and more preferably, 0 to 10 parts by weight.
  • the polymer containing polyalkylene oxide groups is prepared by polymerizing a monomer mixture which contains monomer (A), monomer (B) and monomer (C), as well as monomer (D), if necessary, and also contains monomer (E), if necessary, as well as monomer (F), if necessary, so that a dispersant composition for inorganic substances in accordance with the present invention is manufactured.
  • the monomer mixture is preferably polymerized by using a polymerization initiator.
  • the polymerization is carried out by using a known method such as a solution polymerization, an emulsion polymerization and a suspension polymerization, in a solvent.
  • the order in which the monomers are polymerized is not particularly limited. Therefore, all the monomers may be polymerized at one time, or to one part of the monomers that has been preliminarily heated, the other monomers may be added so as to carry out the polymerization.
  • the polymerization initiator is preferably added thereto in a separated manner from the monomers or the mixture of the monomers.
  • the polymerization in the solvent may be carried out either in a batch process or in a continuous process, and with respect to the solvent, examples thereof include: so- called water, such as pure water, distilled water and ion exchange water, lower alcohols, such as methyl alcohol, ethyl alcohol and isopropyl alcohol, aromatic hydrocarbons, such as benzene, toluene and xylene, aliphatic hydrocarbons, such as cyclohexane and n-hexane, esters such as ethylacetate, and carbonyl compounds such as acetone and methylethylketone.
  • so- called water such as pure water, distilled water and ion exchange water
  • lower alcohols such as methyl alcohol, ethyl alcohol and isopropyl alcohol
  • aromatic hydrocarbons such as benzene, toluene and xylene
  • aliphatic hydrocarbons such as cyclohexane and n-hexane
  • the above-mentioned aqueous solvents are preferably used as the solvent.
  • the polymerization initiator it is preferable to use such a compound as to initiate a polymerization reaction in the monomer mixture even when it is slightly added thereto, and to be used in an aqueous solvent and an organic compound.
  • Examples thereof include peroxides, such as ammonium persulfate, sodium persulfate, potassium persulfate, hydrogen peroxide and t-butylhydroperoxide and t- butylperoxybenzoate, and azo compounds, such as 2,2-azobisisobutyronitrile, 2,2'- azobis(2-amidinopropane)dihydrochloride and 2,2-azobis(2,4-dimethyl)valeronitrile.
  • peroxides such as ammonium persulfate, sodium persulfate, potassium persulfate, hydrogen peroxide and t-butylhydroperoxide and t- butylperoxybenzoate
  • azo compounds such as 2,2-azobisisobutyronitrile, 2,2'- azobis(2-amidinopropane)dihydrochloride and 2,2-azobis(2,4-dimethyl)valeronitrile.
  • ammonium persulfate, sodium persulfate, potassium persulfate and hydrogen peroxide are preferably used.
  • accelerators such as sodium hydrogensulfite and Mohr's salt, may be used in combination with the polymerization initiator.
  • the chain transfer agent it is preferable to use such a compound as to adjust the molecular weight of the polymer even when it is slightly added thereto, and to be used in an aqueous solvent and an organic solvent.
  • chain transfer agents include mercaptoethanol, thioglycerol, thioglycolic acids, thioglycolic acid octyls, mercaptomethylpropionate, and n-dodecylmercaptan.
  • mercaptoethanol, thioglycerol and thioglycolic acid are preferably used.
  • the emulsifier refers to a surfactant which is used for forming an emulsion between the aqueous solvent and each monomer, and which is preferably a surfactant giving no adverse effects on the polymerization reaction.
  • the emulsifier may be a mixture selected from the group consisting of compounds having a sulfonic acid group, a sulfonate group or a sulfate ester group and mixtures thereof, and may also be a normal surfactant.
  • the surfactant examples thereof include anionic surfactants, such as soap, alkylsulfonate, and polyoxyethylene alkyl sulfate; and nonionic surfactants such as polyoxyalkyl aryl ether and oxyethyleneoxypropylene block copolymers.
  • a polymerizable emulsifier is preferably used as the emulsifier.
  • the polymerizable emulsifier is a compound which has a polymerizable functional group, and is allowed to function as an emulsifier capable of forming an emulsion between the aqueous solvent and the monomer mixture.
  • the polymerizable emulsifier preferable examples thereof include: an ethylene-based unsaturated monomer selected from the group consisting of a sulfonic acid group, a sulfonate group, a sulfate ester group or an ethyleneoxy group and mixtures of these.
  • the sulfonic acid group or the sulfonate group of the polymerizable emulsifier may be in the form of salt, and with respect to paired cations of the sulfonic acid group or the sulfonate group, ammonium ions and alkali metal ions are preferably used, and in particular, ammonium ions, potassium ions and sodium ions are more preferably used.
  • Examples of materials containing such a polymerizable emulsifier include: Eleminol JS-2 (trade name) made by Sanyo Kasei (K.K.), Eleminol RS-30 (trade name) made by Sanyo Kasei (K.K.), Aquaron RN-20 (trade name) made by Daiichi Kogyo Seiyaku (K.K.), Aquaron HS-10 (trade name) made by Daiichi Kogyo Seiyaku (K.K.), etc.
  • polymer containing polyalkylene oxide groups obtained as described above, as it is, may be used as the dispersant composition for inorganic substances of the present invention; however, a neutralized matter obtained by neutralizing the polymer with an alkali substance or an acid substance may be preferably used. Moreover, a mixture between a neutralized matter and an unneutralized matter may be used.
  • the neutralization of the polymer containing polyalkylene oxide groups may be carried out by using a conventional generally-used method; for example, a method is proposed in which, upon completion of above polymerization reaction, while the resulting mixture is being stirred and cooled at room temperature, an aqueous solution of an alkali substance, such as sodium hydroxide, potassium hydroxide, ammonia or calcium hydroxide, or an acidic substance, such as hydrochloric acid, acetic acid, sulfuric acid or citric acid is added thereto
  • an alkali substance such as sodium hydroxide, potassium hydroxide, ammonia or calcium hydroxide
  • an acidic substance such as hydrochloric acid, acetic acid, sulfuric acid or citric acid
  • the resulting polymer containing polyalkylene oxide groups or the neutralized matter thereof after the reaction may be used as the dispersant composition for inorganic substances of the present invention in the same form as that after the reaction, without being separated from the solvent, the polymerization initiator, etc.
  • a known mixing agent of a dispersant composition for inorganic substances for example, a conventional dispersant composition for inorganic substances, a thickener, etc. may be appropriately added.
  • the dispersant composition for inorganic substances of the present invention is used as a dispersant composition for inorganic substances for forming a hydraulic composition
  • an antifoamer, an air- directing agent, a wetting dispersant, a waterproofing agent, a strength-improver, a cure- delaying agent, a cure-accelerator, etc. may be added.
  • various appropriate additive agents for known dispersant compositions for inorganic substances may be added thereto, if necessary, so as to form a dispersant composition for inorganic substances.
  • the rate of addition of these additive agents to the polymer containing polyalkylene oxide groups or the neutralized matter thereof is preferably set in the range of 0.01 to 50% by weight in its solid fo ⁇ n without containing the solvent, more preferably, 0.01 to 5% by weight, and most preferably, 0.05 to 1% by weight.
  • the dispersant composition for inorganic substances of the present invention used in the presence of an aqueous solvent, is preferably applied to inorganic pigments, such as titanium dioxide, calcium carbonate and clay, as well as to hydraulic materials, such as calcined calcium sulfate and cement.
  • inorganic pigments such as titanium dioxide, calcium carbonate and clay
  • hydraulic materials such as calcined calcium sulfate and cement.
  • the dispersant composition for inorganic substances of the present invention is prepared in the presence of a solvent, it fo ⁇ ns a mixed state with the solvent when it is prepared, and in this state, the dispersant composition is preferably in a virtually dissolved state.
  • the dispersant composition of the present invention may assume a solid form (for example, powder) or a liquid form which is obtained by eliminating the solvent by using an appropriate method (for example, evaporation, etc.).
  • the dispersant composition of the present invention includes a material in which such a solid or liquid is mixed with, or preferably, dissolved in an aqueous solvent to which the dispersant composition is applied or in other aqueous solvents.
  • Monomers (A) to (C), which are used to prepare the dispersant composition for inorganic substances of the present invention, are shown as follows:
  • (Al) to (A4) are monomers (A), each having an anionic group and a double bond between carbon atoms:
  • (Al) is acrylic acid
  • (A2) is maleic anhydride
  • (A3) is sodium p-styrenesulfonate
  • (Bl) to (B4) are monomers (B), each having a cationic group and a double bond between carbon atoms.
  • (Cl ) to (C3) are monomers (C), each having a polyalkylene oxide group and a double bond between carbon atoms:
  • Example 1 which contained a neutralized matter of a target polymer (hereinafter, also referred to as "polymer”) having polyalkylene oxide groups.
  • the weight average molecular weight (converted based upon polyethylene oxide) of the neutralized matter of the polymer was examined by using a water-system GPC (column: GMPW XL (brand name) made by Toso (K.K.)), and a value 41,000 was obtained.
  • the concentration of the solid components in the dispersant composition for inorganic substances in Example 1 was 25.9% by weight.
  • an aqueous solution was prepared in which to 70 g of distilled water were dissolved 16 g of acrylic acid (Al), 4.4 g of sodium p-styrenesulfonate (A3), 8 g of N,N,N-trimethyl-N- (2-methacryloxyethyl)ammonium chloride (B2), 172 g of monomethoxypolyethylene oxide monomethacrylate (C2), and 3.0 g of 2-mercaptoethanol, and an aqueous solution was also prepared in which to 200 g of distilled water was dissolved 3.0 g of sodium persulfate. These two aqueous solutions were simultaneously dropped into the above- mentioned distilled water in the flask that was maintained at 80 degrees C.
  • Example 3 The aqueous solution containing (Al), (A3), (152) and (C2) was dropped in three hours, and the aqueous solution of sodium persi lfate was dropped in three and a half hours. Thereafter, the dispersant composition of Example 3 was obtained by using the same method as described in Example 1.
  • the ratios of the respective monomers used in preparing the dispersant composition of Example 3, the molecular weight of the neutralized matter of the polymer contained in the dispersant composition and the concentration of the solid components in the dispersant composition are listed in Table 1.
  • the ratios of the respective monomers used in preparing the dispersant composition of Example 4 the molecular weight of the neutralized matter of the polymer contained in the dispersant composition and the concentration of the solid components in the dispersant composition are listed in Table 1.
  • Example 5 The same method as described in the preparation of the dispersant composition of Example 3 was carried out except that, instead of 16 g of acrylic acid (Al), 20 g of (Al) was used, and that no sodium p-styrenesulfonate (A3) was used; thus, a dispersant composition of Example 5 was obtained.
  • the ratios of the respective monomers used in preparing the dispersant composition of Example 5, the molecular weight of the neutralized matter of the polymer contained in the dispersant composition and the concentration of the solid components in the dispersant composition are listed in Table 1.
  • the ratios of the respective monomers used in preparing the dispersant composition of Example 8, the molecular weight of the neutralized matter of the polymer contained in the dispersant composition and the concentration of the solid components in the dispersant composition are listed in Table 1.
  • Dispersant compositions of Example 4 and Comparative Example 4 were used as the dispersant composition.
  • Titanium dioxide (rutile type)(made by Kanto Kagaku K.K.)
  • Heavy calcium carbonate (made by Takehara Kagaku Kogyo K.K.)
  • Kaolin clay made by Tsuchiya Kaolin K.K.
  • each of the above-mentioned five kinds of powders (0.4 g) was added to each of the dispersant compositions of Example 4 and Comparative Example 4 so that its amount of solid components was set to 0.2 g. Moreover, to this was added distilled water so that the total amount thereof was set to 20 ml; thus, each of the mixtures for evaluation on the dispersing property was prepared. After having been sufficiently stirred, the mixture for evaluation was transferred to a measuring cylinder of 20 ml.
  • cement mortar was prepared in the same method as described in JIS R 5201.
  • 4.6 g and 5.8 g of the dispersant composition of Example 1 were mixed with 300 g of water, respectively, and each of these was added to a mixture preliminarily prepared by kneading 600 g of normal Portland cement that was commercially available with 1800 g of sand (specific gravity: 2.62, fineness modulus: 2.60), and this was stirred at a low speed for one minute, and then stirred at a high speed for two minutes, using a mortar mixer to obtain cement mortar.
  • the rate of addition (solid components of the dispersant composition/cement 100) of the solid components of the dispersant compositions were 0.20% by weight and 0.25% by weight respectively.
  • cement setting time in which the unit was hour (hr) was obtained.
  • cement setting time in which the unit was hour (hr)
  • any one of Examples 1 to 8 is a dispersant composition consisting of a polymer having polyalkylene oxide groups, anionic groups and cationic groups at the same time.
  • any one of Comparative Examples 1 to 3 is a dispersant composition consisting of a polymer having either anionic groups or cationic groups although it has polyalkylene oxide groups. The results of the experiments show that any of the dispersant compositions of Comparative Examples are inferior in either of the dispersing property and the cement setting time.
  • the dispersant composition for inorganic substances used in the presence of an aqueous solvent, contains a polymer containing polyalkylene oxide groups, the polyalkylene oxide group being represented by formula (I):
  • R represents an ethylene group or a propylene group
  • R ⁇ represents an alkyl group having carbon atoms of 1 to 20, which may contain hydrogen or a substitute group, and n is an integer in the range of 1 to 300], wherein the polymer, which contains polyalkylene oxide groups, also contains anionic group and cationic groups so that at least one of the dispersing property and dispersing stability of the inorganic substance to water can be improved.
  • the anionic group of the polymer containing polyalkylene oxide groups is at least one kind selected from the group consisting of carboxyl groups, sulfonic acid groups, phosphoric acid group, carboxylate group, sulfonate group and phosphate group; therefore, it is possible to improve the dispersing property of the inorganic substance to water.
  • the cationic group of the polymer containing polyalkylene oxide groups is at least one kind selected from the group consisting of an amino group and an ammonium base; therefore, it is possible to improve the dispersing property of the inorganic substance to water.
  • the polymer containing polyalkylene oxide groups has its ratio of the number of anionic groups and the number of cationic groups (number of anionic groups/number of cationic groups) set in the range of 30/70 to 99.5/0.5, it is possible to further improve the dispersing stability of the inorganic substance to water.
  • the polymer containing polyalkylene oxide groups is obtained by polymerizing a monomer mixture consisting of:
  • (C) a monomer having polyalkylene oxide group and a double bond between carbon atoms, wherein the polyalkylene oxide group is represented by formula (I): -(R'-O)n-R 2 (I) [in formula (I),
  • R represents an ethylene group or a propylene group
  • R represents an alkyl group having carbon atoms of 1 to 20, which may contain hydrogen or a substitute group, and n is an integer in the range of 1 to 300]. Therefore, it is possible to further improve the dispersing stability of the inorganic substance to water.
  • the application of the dispersant composition of the present invention makes it possible to improve, in particular, the dispersing property and dispersing stability of an inorganic pigment and a hydraulic material to water.

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Abstract

L'invention concerne une composition de dispersion pour substances inorganiques, utilisée en présence d'un solvant aqueux et caractérisée en ce qu'elle renferme un polymère contenant des groupes d'oxyde de polyalkylène ainsi que des groupes anioniques et cationiques, le groupe d'oxyde de polyalkylène étant de formule (I) :-(R1-0)n-R2, dans laquelle R1 représente un groupe éthylène ou un groupe propylène, R2 représente un groupe alkyle ayant entre 1 et 20 atome(s) carbone, pouvant contenir un groupe hydrogène ou de substitution et n représente un entier allant de 1 à 300. Le groupe anionique est de préférence sélectionné dans le groupe constitué d'un groupe carboxyle, d'un groupe d'acide sulfonique, d'un groupe d'acide phosphorique, d'un groupe de carboxylate, d'un groupe de sulfonate et d'un groupe de phosphate. Le groupe cationique est sélectionné de préférence dans le groupe constitué d'un groupe amino et d'une base d'ammonium. Aussi, la composition de dispersion pour les substances inorganiques permet-elle l'amélioration d'au moins l'une des propriétés suivantes, à savoir la dispersion et la stabilité de dispersion de la substance inorganique dans l'eau.
PCT/US2001/003058 2000-02-09 2001-01-31 Composition de dispersion WO2001058579A1 (fr)

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EP1743877A1 (fr) * 2005-06-16 2007-01-17 Kao Corporation Dispersant pour composition hydraulique
WO2008141844A1 (fr) * 2007-05-21 2008-11-27 Evonik Röhm Gmbh Dispersion contenant des particules inorganiques, de l'eau et au moins un additif polymère
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FR2948118A1 (fr) * 2009-07-17 2011-01-21 Coatex Sas Additif d'inertage des impuretes pour les suspensions aqueuses de sulfate de calcium hemihydrate contenant un polymere peigne et un polymere cationique
WO2015063419A1 (fr) * 2013-11-04 2015-05-07 Lafarge Composition pouzzolanique
FR3012809A1 (fr) * 2013-11-04 2015-05-08 Lafarge Sa Composition pouzzolanique

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JP3643003B2 (ja) 2005-04-27
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JP2001220196A (ja) 2001-08-14

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