WO2012160933A1 - (メタ)アクリル酸系共重合体 - Google Patents
(メタ)アクリル酸系共重合体 Download PDFInfo
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- WO2012160933A1 WO2012160933A1 PCT/JP2012/061088 JP2012061088W WO2012160933A1 WO 2012160933 A1 WO2012160933 A1 WO 2012160933A1 JP 2012061088 W JP2012061088 W JP 2012061088W WO 2012160933 A1 WO2012160933 A1 WO 2012160933A1
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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
- C08F220/62—Monocarboxylic acids having ten or more carbon atoms; Derivatives thereof
- C08F220/68—Esters
-
- 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
-
- 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
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
-
- 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
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1802—C2-(meth)acrylate, e.g. ethyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
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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
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/28—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety
- C08F220/285—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety and containing a polyether chain in the alcohol moiety
- C08F220/286—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety and containing a polyether chain in the alcohol moiety and containing polyethylene oxide in the alcohol moiety, e.g. methoxy polyethylene glycol (meth)acrylate
Definitions
- the present invention relates to a (meth) acrylic acid copolymer.
- Alkali swelling emulsion polymer (Alkali swellable emulsion polymer, hereinafter abbreviated as ASE polymer) is a polymer used to increase the viscosity of a solvent such as water.
- An ASE polymer is usually a copolymer of an acidic vinyl monomer and a nonionic vinyl monomer.
- aqueous polymer dispersion having a low viscosity eg, 100 mPa ⁇ s or less
- a low pH eg, 4.5 or less
- the ASE polymer has a relatively low viscosity (for example, the viscosity of an aqueous solution containing 1% by mass of the polymer is 10,000 mPa ⁇ s or less), the amount of the ASE polymer required for imparting a desired viscosity to the article is very high. There were cases where it became more economically disadvantageous.
- hydrophobically modified alkali-swelled emulsion polymers (Hydrophobically modified alkali swellable emulsion polymer, hereinafter may be abbreviated as HASE polymer) are known. Like the above ASE polymer, the viscosity of a solution such as water is increased. A polymer used to enhance.
- the HASE polymer is usually a copolymer of an acidic vinyl monomer, a nonionic vinyl monomer, and a monomer having a hydrophobic group, and is different from the ASE polymer in that a monomer having a hydrophobic group is copolymerized.
- the HASE polymer is prepared as an aqueous polymer dispersion having a low viscosity (eg, 100 mPa ⁇ s or less) at a low pH (eg, 4.5 or less). When this is neutralized, hydrophobic group association by a monomer having a hydrophobic group In general, it is known that the viscosity is higher than that of the ASE polymer.
- a low viscosity eg, 100 mPa ⁇ s or less
- a low pH eg, 4.5 or less
- an alkylacrylamide-containing emulsion copolymer is disclosed (see Patent Document 1).
- HASE polymers are expensive, it is not economically preferable to increase their use amount.
- HASE polymers have heretofore been used in combination with other rheology modifiers (thickeners), but the use of multiple materials is not desirable in commercial scale manufacturing processes. From these backgrounds, there has been a demand for a HASE polymer having a high thickening effect with a small amount of use, but no HASE polymer that satisfies this has been reported.
- An object of the present invention is to provide a HASE polymer having a higher thickening effect in a small amount at a low cost.
- the (meth) acrylic acid copolymer according to the present invention includes (meth) acrylic acid, a (meth) acrylic acid alkyl ester having an alkyl group having 1 to 4 carbon atoms, and a general formula (I): (Wherein R represents a hydrogen atom or a methyl group, and n represents an integer of 2 to 60), which is obtained by polymerizing (meth) acrylic acid (polyoxyethylene stearyl ether) ester (meta ) Acrylic acid copolymer, The viscosity at 25 ° C.
- aqueous solution of the (meth) acrylic acid copolymer when a 1% by mass aqueous solution of the (meth) acrylic acid copolymer is adjusted to pH 7.5 with a 6% by mass sodium hydroxide aqueous solution is 1,000 to 100,000 mPa ⁇ s. , 1% by mass of the (meth) acrylic acid copolymer and 5.3% by mass of polyoxyethylene (2) sodium lauryl sulfate, and the pH was adjusted to 7 to 7.5 with 6% by mass sodium hydroxide.
- the viscosity of the aqueous solution at 25 ° C. is 500 to 50,000 mPa ⁇ s.
- the (meth) acrylic acid copolymer according to the present invention can be produced at a low cost, and can impart a higher thickening effect in a small amount.
- the (meth) acrylic acid copolymer according to the present invention is obtained by polymerizing (meth) acrylic acid, (meth) acrylic acid alkyl ester, and (meth) acrylic acid (polyoxyethylene stearyl ether) ester.
- (Meth) acrylic acid copolymer “(meth) acryl” represents “acryl” and “methacryl”, and “(meth) acrylate” represents “acrylate” and “methacrylate”.
- the (meth) acrylic acid alkyl ester is a (meth) acrylic acid alkyl ester having an alkyl group having 1 to 4 carbon atoms, specifically, methyl (meth) acrylate, ethyl (meth) acrylate, N-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, sec-butyl (meth) acrylate, isobutyl (meth) acrylate, tert-butyl (meth) acrylate Can be mentioned.
- (meth) acrylic acid alkyl esters from the viewpoint of the neutralized aqueous solution viscosity of the obtained (meth) acrylic acid copolymer, from the viewpoint of being easily available at low cost, ethyl (meth) acrylate, (meth) N-butyl acrylate and tert-butyl (meth) acrylate are preferably used.
- These (meth) acrylic acid alkyl esters may be used alone or in combination of two or more.
- the proportion of the (meth) acrylic acid alkyl ester used is preferably 70 to 900 parts by weight, more preferably 80 to 400 parts by weight, even more preferably 100 parts by weight of the (meth) acrylic acid. 100 to 200 parts by mass.
- the proportion of the (meth) acrylic acid alkyl ester used is less than 70 parts by mass, the hydrophilicity of the (meth) acrylic acid copolymer produced when reacted in water is too high to obtain as an aqueous dispersion. May become difficult.
- the (meth) acrylic acid (polyoxyethylene stearyl ether) ester is a compound represented by the general formula (I).
- R represents a hydrogen atom or a methyl group
- n represents an integer of 2 to 60.
- (meth) acrylic acid (polyoxyethylene stearyl ether) esters when a neutralized aqueous solution was prepared using the obtained (meth) acrylic acid copolymer, the (meth) acrylic acid (polyoxyethylene stearyl ether) was prepared.
- a compound in which n is 10 to 60 in the general formula is preferable, and a compound in which n is 20 to 40 is more preferable.
- (Meth) acrylic acid (polyoxyethylene stearyl ether) ester may be used alone or in combination of two or more.
- the use ratio of the (meth) acrylic acid (polyoxyethylene stearyl ether) ester is preferably 2 to 26 parts by mass with respect to 100 parts by mass of the total amount of the (meth) acrylic acid and the (meth) acrylic acid alkyl ester. More preferably, it is 5 to 20 parts by mass, and further preferably 7 to 18 parts by mass.
- the proportion of (meth) acrylic acid (polyoxyethylene stearyl ether) ester used is less than 2 parts by mass, the viscosity of the neutralized aqueous solution of the resulting (meth) acrylic acid copolymer may be low.
- the (meth) acrylic acid copolymer according to the present invention can be produced by a polymerization method such as an emulsion polymerization method, a suspension polymerization method, or a solution polymerization method.
- a polymerization method such as an emulsion polymerization method, a suspension polymerization method, or a solution polymerization method.
- the manufacturing method by an emulsion polymerization method is demonstrated in detail as an example.
- the polymerization reaction is performed in water.
- the proportion of water used is preferably 100 to 900 parts by mass with respect to a total of 100 parts by mass of (meth) acrylic acid, (meth) acrylic acid ester, and (meth) acrylic acid (polyoxyethylene stearyl ether) ester. More preferably, it is 120 to 600 parts by mass, and further preferably 150 to 300 parts by mass.
- the proportion of water used is less than 100 parts by mass, the (meth) acrylic acid copolymer is not dispersed and becomes a lump and may not be obtained as an emulsion.
- the usage-amount of water exceeds 900 mass parts, there exists a possibility that productivity may worsen and it may become economically inefficient.
- the surfactant is not particularly limited, and any of anionic, cationic and amphoteric ionic surfactants and nonionic surfactants can be used.
- anionic surfactants and nonionic surfactants are preferably used from the viewpoint of availability at low cost and safety.
- anionic surfactant examples include fatty acid soaps such as sodium laurate and sodium palmitate; higher alkyl sulfates such as sodium lauryl sulfate and potassium lauryl sulfate; polyoxyethylene-lauryl sulfate triethanolamine, polyoxy Alkyl ether sulfates such as ethylene-sodium lauryl sulfate; N-acyl sarcosine acids such as sodium lauroyl sarcosine; higher fatty acid amides such as sodium N-myristoyl-N-methyl taurine, coconut oil fatty acid methyl taurine sodium and lauryl methyl taurine sodium Sulfonic acid salts; Phosphoric acid ester salts such as sodium polyoxyethylene-oleyl ether phosphate, polyoxyethylene-stearyl ether phosphoric acid; di-2-ethylhexyl Sulfosuccinate such as sodium sulfosuccinate, monolauroyl monoethanolamide polyoxy
- anionic surfactants polyoxyethylene-sodium lauryl sulfate and sodium lauryl sulfate are preferably used from the viewpoint of solubility during use
- the nonionic surfactant is classified into, for example, a lipophilic nonionic surfactant and a hydrophilic nonionic surfactant.
- the lipophilic nonionic surfactant include sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, sorbitan trioleate, penta-2 -Sorbitan fatty acid esters such as diglycerol sorbitan tetrahexylhexylate, diglycerol sorbitan tetrahexyl-2-ethylhexylate; mono-cotton oil fatty acid glycerin, monoerucic acid glycerin, sesquioleate glycerin, monostearate glycerin, ⁇ , ⁇ '-oleic acid pyro Glycerin polyglycerin fatty acids such as
- hydrophilic nonionic surfactant examples include polyoxyethylene-sorbitan monooleate, polyoxyethylene-sorbitan monostearate, polyoxyethylene-sorbitan monooleate, polyoxyethylene-sorbitan tetraoleate and the like.
- Polyoxyethylene-sorbitan fatty acid esters polyoxyethylene-sorbitol monolaurate, polyoxyethylene-sorbitol monooleate, polyoxyethylene-sorbitol monooleate, polyoxyethylene-sorbitol monooleate, etc.
- surfactants may be used alone or in combination of two or more.
- the use ratio of the surfactant is preferably 0.1 to 10 parts by mass, more preferably 0.3 to 3 parts by mass, and further preferably 0.5 to 3 parts by mass with respect to 100 parts by mass of the water. 2 parts by mass.
- the radical polymerization initiator is not particularly limited and is a persulfate compound such as ammonium persulfate, potassium persulfate, or sodium persulfate; peroxide such as hydrogen peroxide, benzoyl peroxide, acetyl peroxide, or lauryl peroxide.
- persulfate compound such as ammonium persulfate, potassium persulfate, or sodium persulfate
- peroxide such as hydrogen peroxide, benzoyl peroxide, acetyl peroxide, or lauryl peroxide.
- Organic hydrogen peroxides such as cumene hydroperoxide and tert-butyl hydroperoxide; organic peracids such as peracetic acid and perbenzoic acid; 2,2′-azobisisobutyronitrile, 2,2′-azobis (2- ( Azo radical polymerization initiators such as 4,5-dihydroimidazolyl) propane, 2,2′-azobis (2-methylpropionamidine) dihydrochloride, 4,4′-azobis (4-cyanovaleric acid), etc.
- these radical polymerization initiators from the viewpoint of easy handling, ammonium persulfate, potassium persulfate Beam, sodium persulfate is preferably used.
- These radical polymerization initiators may be used singly or in a combination of two or more.
- the proportion of the radical polymerization initiator used is preferably 100 parts by mass of the total amount of (meth) acrylic acid, (meth) acrylic acid alkyl ester, and (meth) acrylic acid (polyoxyethylene stearyl ether) ester.
- the amount is 0.01 to 1 part by mass, more preferably 0.015 to 0.5 part by mass, and still more preferably 0.02 to 0.2 part by mass.
- the proportion of the radical polymerization initiator used is less than 0.01 parts by mass, the polymerization reaction takes time and is not economical, and the polymerization reaction may not be completed.
- the usage-amount of a radical polymerization initiator exceeds 1 mass part, there exists a possibility that a polymerization reaction rate may become very quick and a polymerization reaction cannot be controlled.
- the reaction temperature in the polymerization reaction is preferably 30 to 95 ° C., more preferably 70 to 90 ° C., and further preferably 75 to 90 ° C.
- the reaction temperature is less than 30 ° C., the polymerization reaction takes time and is not economical, and the polymerization reaction may not be completed.
- the reaction temperature exceeds 95 ° C., it is difficult to remove the polymerization heat because it is close to the boiling point of water, which is the polymerization medium, and the polymerization reaction may not be controlled.
- the polymerization reaction time cannot be determined unconditionally depending on factors such as the reaction temperature, but is usually preferably set to 0.5 to 5 hours.
- the (meth) acrylic acid copolymer according to the present invention has the rheological characteristics of an aqueous solution using the (meth) acrylic acid copolymer. From the viewpoint of adjusting, when the copolymer is produced, a polymerization reaction can be performed in the presence of a crosslinking agent, a chain transfer agent and the like.
- the cross-linking agent is not particularly limited, but is preferably a compound having two or more ethylenically unsaturated groups.
- Specific examples of the crosslinking agent include (meth) acrylic acid esters having two or more substituted polyols; allyl ethers having two or more substituted polyols; diallyl phthalate, triallyl phosphate, allyl methacrylate, tetraallyloxyethane, Examples include triallyl cyanurate, divinyl adipate, vinyl crotonic acid, 1,5-hexadiene, and divinylbenzene.
- polyol examples include ethylene glycol, propylene glycol, polyoxyethylene glycol, polyoxypropylene glycol, glycerin, polyglycerin, trimethylolpropane, pentaerythritol, saccharose, sorbitol and the like.
- cross-linking agents pentaerythritol tetraallyl ether, tetraallyloxyethane, triallyl phosphate are used from the viewpoint of easy viscosity adjustment of the neutralized viscous liquid using the (meth) acrylic acid copolymer obtained.
- Polyallyl saccharose, trimethylolpropane triacrylate, and trimethylolpropane trimethacrylate are preferably used.
- These crosslinking agents may be used independently and may use 2 or more types together.
- the proportion of the crosslinking agent used is preferably 0 with respect to 100 parts by mass of the total amount of (meth) acrylic acid, (meth) acrylic acid alkyl ester, and (meth) acrylic acid (polyoxyethylene stearyl ether) ester. 0.01 to 2 parts by mass, more preferably 0.05 to 1.5 parts by mass, and still more preferably 0.1 to 1 part by mass.
- the use ratio of the crosslinking agent is less than 0.01 parts by mass, the physical properties of the copolymer are not changed due to the addition of the crosslinking agent, and there is a possibility that it does not substantially make sense.
- the usage-amount of a crosslinking agent exceeds 2 mass parts, there exists a possibility that the effect corresponding to the usage-amount may not be seen.
- the chain transfer agent is not particularly limited, but ethanethiol, propanethiol, dodecanethiol, thioglycolic acid, thiomalic acid, dimethyldithiocarbamic acid or a salt thereof, diethyldithiocarbamic acid or a salt thereof, L-cysteine or a salt thereof, 3 -Carboxypropane thiol, isopropanol, sodium hypophosphite and the like.
- the chain transfer agent is preferably used in a total amount of 100 parts by mass of (meth) acrylic acid, (meth) acrylic acid alkyl ester, and (meth) acrylic acid (polyoxyethylene stearyl ether) ester.
- the amount is 0.01 to 2 parts by mass, more preferably 0.05 to 1.5 parts by mass, and still more preferably 0.1 to 1 part by mass.
- the use ratio of the chain transfer agent is less than 0.01 parts by mass, the physical properties of the copolymer are not changed due to the addition of the chain transfer agent, and there is a possibility that it does not substantially make sense.
- the usage-amount of a chain transfer agent exceeds 2 mass parts, there exists a possibility that the effect corresponding to the usage-amount may not be seen.
- the (meth) acrylic acid copolymer according to the present invention is obtained.
- the (meth) acrylic acid copolymer according to the present invention is 25 ° C. when a 1% by mass aqueous solution of the (meth) acrylic acid copolymer is adjusted to pH 7.5 with a 6% by mass sodium hydroxide aqueous solution.
- the viscosity (hereinafter sometimes referred to as viscosity A) is 1,000 to 100,000 mPa ⁇ s, preferably 10,000 to 70,000 mPa ⁇ s, more preferably 15,000 to 50. 1,000 mPa ⁇ s. If this viscosity is less than 1,000 mPa ⁇ s, the amount of copolymer required to give the system the desired viscosity increases, which is economically disadvantageous.
- the viscosity is a value measured using a BH type rotational viscometer at the same temperature after allowing the measurement sample to stand for 2 hours in a thermostatic bath set at 25 ° C. Measured.
- the (meth) acrylic acid copolymer according to the present invention contains 1% by mass of the (meth) acrylic acid copolymer and 5.3% by mass of polyoxyethylene (2) sodium lauryl sulfate,
- the viscosity at 25 ° C. of an aqueous solution adjusted to pH 7 to 7.5 with 6% by mass sodium hydroxide (hereinafter sometimes referred to as viscosity B) is 500 to 50,000 mPa ⁇ s, preferably 1 000 to 30,000 mPa ⁇ s, more preferably 5,000 to 20,000 mPa ⁇ s.
- this viscosity is less than 500 mPa ⁇ s, the amount of copolymer required to give the system the desired viscosity increases, which is economically disadvantageous. Moreover, when this viscosity exceeds 50,000 mPa ⁇ s, handling becomes difficult due to the high viscosity, which is disadvantageous for industrial use.
- the rate of decrease in the viscosity B with respect to the viscosity A is preferably 80% or less, and more preferably 70% or less. If the viscosity reduction rate is 80% or less, it can be easily adjusted to a desired viscosity when used in an article such as a shampoo.
- the above-mentioned viscosities can be adjusted by controlling the surfactant, the monomer composition, the polymerization initiator, and the reaction temperature during the polymerization reaction. More specifically, referring to the following tendencies, the reaction temperature, the amount of surfactant used, the amount of polymerization initiator used, and the balance of various monomers are adjusted to satisfy the above-mentioned viscosity conditions.
- a (meth) acrylic acid copolymer can be prepared.
- the viscosity (A) of the resulting (meth) acrylic acid copolymer tends to be low and the viscosity B tends to be low.
- the reaction temperature is set high, the viscosity (A) of the resulting (meth) acrylic acid copolymer tends to increase and the viscosity B tends to increase.
- the amount of the surfactant used in the emulsion polymerization reaction is set low, the viscosity (A) of the resulting (meth) acrylic acid copolymer tends to be low and the viscosity B tends to be low.
- the viscosity (A) of the resulting (meth) acrylic acid copolymer tends to be high and the viscosity B tends to be high.
- (Meth) acrylic acid, (meth) acrylic acid alkyl ester, and (meth) acrylic acid (polyoxyethylene stearyl ether) ester is obtained when the proportion of (meth) acrylic acid contained in the monomer mixture is set low ( The viscosity A of the (meth) acrylic acid copolymer tends to be low, and the viscosity B tends to be low.
- the (meth) acrylic acid-based copolymer according to the present invention is preferably a (meth) acrylic acid-based copolymer aqueous dispersion in a state of being dispersed in water from the main purpose of use.
- the (meth) acrylic-acid type copolymer obtained by the said emulsion polymerization method can be easily obtained in the state disperse
- the content ratio (concentration) of the (meth) acrylic acid copolymer in the (meth) acrylic acid copolymer aqueous dispersion is preferably from the viewpoint of operability in production and cost in transportation. Is 5 to 50% by mass, more preferably 20 to 40% by mass.
- the (meth) acrylic acid copolymer and the (meth) acrylic acid copolymer aqueous dispersion according to the present invention have unique viscosity characteristics, shampoo, body wash, cosmetics, hair gel, cream, liquid It can be used for thickeners such as detergents, alcohol disinfectants, dishwashing detergents, bath gels and shower gels. Therefore, this invention also provides the water-soluble thickener etc. which contain the (meth) acrylic acid type-copolymer or (meth) acrylic acid type polymer aqueous dispersion concerning this invention.
- Thickeners using the (meth) acrylic acid copolymer and (meth) acrylic acid copolymer aqueous dispersion according to the present invention are neutral in the presence of a surfactant due to their unique viscosity characteristics. Since a high thickening effect can be imparted to the aqueous solution in a small amount, it can be used for thickeners such as shampoo, body wash, dishwashing detergent, bath gel, shower gel and the like.
- Example 1 In a 100 mL beaker equipped with a stirrer capable of sealing, 25 g of ethyl acrylate (manufactured by Tokyo Chemical Industry Co., Ltd.), 17 g of methacrylic acid (manufactured by Tokyo Chemical Industry Co., Ltd.), methacrylic acid (polyoxyethylene (30) stearyl ether) 0.7 g of ester (manufactured by NOF Corporation, trade name: Blenmer PSE1300, in general formula (I), R is methyl group, n is 30) was charged and stirred at 25 ° C. for 30 minutes to obtain a monomer mixture.
- ethyl acrylate manufactured by Tokyo Chemical Industry Co., Ltd.
- methacrylic acid manufactured by Tokyo Chemical Industry Co., Ltd.
- methacrylic acid polyoxyethylene (30) stearyl ether
- ester manufactured by NOF Corporation, trade name: Blenmer PSE1300, in general formula (I), R is methyl group, n is
- the whole amount of the monomer mixture was put into a dropping funnel, and the whole amount of the monomer mixture was dropped continuously for 1 hour while keeping the temperature of the solution at 75 ° C. After completion of dropping, 0.02 g of ammonium persulfate (manufactured by Tokyo Chemical Industry Co., Ltd.) was added, and the temperature of the solution was kept at 80 ° C. and reacted for 1.5 hours.
- the reactor was cooled to 25 ° C. to obtain an emulsion 1 in which the (meth) acrylic acid copolymer was dispersed in water.
- concentration of the (meth) acrylic acid type copolymer in the emulsion 1 was 29.4 mass%.
- Example 2 In a 100 mL beaker equipped with a stirrer capable of sealing, 25 g of ethyl acrylate (manufactured by Tokyo Chemical Industry Co., Ltd.), 17 g of methacrylic acid (manufactured by Tokyo Chemical Industry Co., Ltd.), methacrylic acid (polyoxyethylene (30) stearyl ether) 2.2 g of ester (manufactured by NOF Corporation, trade name: Blenmer PSE1300, in general formula (I), R is methyl group, n is 30) was charged and stirred at 25 ° C. for 30 minutes to obtain a monomer mixture.
- ethyl acrylate manufactured by Tokyo Chemical Industry Co., Ltd.
- methacrylic acid manufactured by Tokyo Chemical Industry Co., Ltd.
- methacrylic acid polyoxyethylene (30) stearyl ether
- ester manufactured by NOF Corporation, trade name: Blenmer PSE1300, in general formula (I), R is methyl group, n is
- the whole amount of the monomer mixture was put into a dropping funnel, and the whole amount of the monomer mixture was dropped continuously for 1 hour while keeping the temperature of the solution at 75 ° C. After completion of dropping, 0.02 g of ammonium persulfate (manufactured by Tokyo Chemical Industry Co., Ltd.) was added, and the temperature of the solution was kept at 80 ° C. and reacted for 1.5 hours.
- the reactor was cooled to 25 ° C. to obtain an emulsion 2 in which a (meth) acrylic acid copolymer was dispersed in water.
- concentration of the (meth) acrylic-acid type copolymer in the emulsion 2 was 30.8 mass%.
- Example 3 In a 100 mL beaker equipped with a stirrer capable of sealing, 25 g of ethyl acrylate (manufactured by Tokyo Chemical Industry Co., Ltd.), 17 g of methacrylic acid (manufactured by Tokyo Chemical Industry Co., Ltd.), methacrylic acid (polyoxyethylene (30) stearyl ether) 3.6 g of ester (manufactured by NOF Corporation, trade name: Blenmer PSE1300, in general formula (I), R is methyl group, n is 30) was charged and stirred at 25 ° C. for 30 minutes to obtain a monomer mixture.
- ethyl acrylate manufactured by Tokyo Chemical Industry Co., Ltd.
- methacrylic acid manufactured by Tokyo Chemical Industry Co., Ltd.
- methacrylic acid polyoxyethylene (30) stearyl ether
- ester manufactured by NOF Corporation, trade name: Blenmer PSE1300, in general formula (I), R is methyl group, n is
- the whole amount of the monomer mixture was put into a dropping funnel, and the whole amount of the monomer mixture was dropped continuously for 1 hour while keeping the temperature of the solution at 75 ° C. After completion of dropping, 0.02 g of ammonium persulfate (manufactured by Tokyo Chemical Industry Co., Ltd.) was added, and the temperature of the solution was kept at 80 ° C. and reacted for 1.5 hours.
- the reactor was cooled to 25 ° C. to obtain an emulsion 3 in which the (meth) acrylic acid copolymer was dispersed in water.
- concentration of the (meth) acrylic-acid type copolymer in the emulsion 3 was 31.1 mass%.
- Example 4 In a 100 mL beaker equipped with a stirrer capable of sealing, 25 g of ethyl acrylate (manufactured by Tokyo Chemical Industry Co., Ltd.), 17 g of methacrylic acid (manufactured by Tokyo Chemical Industry Co., Ltd.), methacrylic acid (polyoxyethylene (30) stearyl ether) 5.1 g of ester (manufactured by NOF Corporation, trade name: Blenmer PSE1300, in general formula (I), R is methyl group, n is 30) was charged and stirred at 25 ° C. for 30 minutes to obtain a monomer mixture.
- ethyl acrylate manufactured by Tokyo Chemical Industry Co., Ltd.
- methacrylic acid manufactured by Tokyo Chemical Industry Co., Ltd.
- methacrylic acid polyoxyethylene (30) stearyl ether
- ester manufactured by NOF Corporation, trade name: Blenmer PSE1300, in general formula (I), R is methyl group, n is
- the whole amount of the monomer mixture was put into a dropping funnel, and the whole amount of the monomer mixture was dropped continuously for 1 hour while keeping the temperature of the solution at 75 ° C. After completion of dropping, 0.02 g of ammonium persulfate (manufactured by Tokyo Chemical Industry Co., Ltd.) was added, and the temperature of the solution was kept at 80 ° C. and reacted for 1.5 hours.
- the reactor was cooled to 25 ° C. to obtain an emulsion 4 in which a (meth) acrylic acid copolymer was dispersed in water.
- concentration of the (meth) acrylic-acid type copolymer in the emulsion 4 was 31.6 mass%.
- Example 5 In a 100 mL beaker equipped with a stirrer capable of sealing, 25 g of ethyl acrylate (manufactured by Tokyo Chemical Industry Co., Ltd.), 17 g of methacrylic acid (manufactured by Tokyo Chemical Industry Co., Ltd.), methacrylic acid (polyoxyethylene (30) stearyl ether) Ester (manufactured by NOF Corporation, trade name: Blemmer PSE1300, in general formula (I), R is a methyl group, n is 30) was charged with 7.3 g and stirred at 25 ° C. for 30 minutes to obtain a monomer mixture.
- the whole amount of the monomer mixture was put into a dropping funnel, and the whole amount of the monomer mixture was dropped continuously for 1 hour while keeping the temperature of the solution at 75 ° C. After completion of dropping, 0.02 g of ammonium persulfate (manufactured by Tokyo Chemical Industry Co., Ltd.) was added, and the temperature of the solution was kept at 80 ° C. and reacted for 1.5 hours.
- the reactor was cooled to 25 ° C. to obtain an emulsion 5 in which the (meth) acrylic acid copolymer was dispersed in water.
- concentration of the (meth) acrylic-acid type copolymer in the emulsion 5 was 32.6 mass%.
- Example 6 In a 100 mL beaker equipped with a stirrer capable of sealing, 25 g of ethyl acrylate (manufactured by Tokyo Chemical Industry Co., Ltd.), 17 g of methacrylic acid (manufactured by Tokyo Chemical Industry Co., Ltd.), methacrylic acid (polyoxyethylene (30) stearyl ether) 10.9 g of ester (manufactured by NOF Corporation, trade name: Blenmer PSE1300, in general formula (I), R is methyl group, n is 30) was charged and stirred at 25 ° C. for 30 minutes to obtain a monomer mixture.
- ethyl acrylate manufactured by Tokyo Chemical Industry Co., Ltd.
- methacrylic acid manufactured by Tokyo Chemical Industry Co., Ltd.
- methacrylic acid polyoxyethylene (30) stearyl ether
- ester manufactured by NOF Corporation, trade name: Blenmer PSE1300, in general formula (I), R is methyl group, n is
- the whole amount of the monomer mixture was put into a dropping funnel, and the whole amount of the monomer mixture was dropped continuously for 1 hour while keeping the temperature of the solution at 75 ° C. After completion of dropping, 0.02 g of ammonium persulfate (manufactured by Tokyo Chemical Industry Co., Ltd.) was added, and the temperature of the solution was kept at 80 ° C. and reacted for 1.5 hours.
- the reactor was cooled to 25 ° C. to obtain an emulsion 6 in which a (meth) acrylic acid copolymer was dispersed in water.
- concentration of the (meth) acrylic-acid type copolymer in the emulsion 6 was 33.9 mass%.
- Example 7 In a 100 mL beaker equipped with a stirrer capable of sealing, 25 g of ethyl acrylate (manufactured by Tokyo Chemical Industry Co., Ltd.), 17 g of methacrylic acid (manufactured by Tokyo Chemical Industry Co., Ltd.), methacrylic acid (polyoxyethylene (9) stearyl ether) 1.6 g of ester (manufactured by NOF Corporation, trade name: Blenmer PSE400, in general formula (I), R is methyl group, n is 9) was charged and stirred at 25 ° C. for 30 minutes to obtain a monomer mixture.
- ethyl acrylate manufactured by Tokyo Chemical Industry Co., Ltd.
- methacrylic acid manufactured by Tokyo Chemical Industry Co., Ltd.
- methacrylic acid polyoxyethylene (9) stearyl ether
- ester manufactured by NOF Corporation, trade name: Blenmer PSE400, in general formula (I), R is methyl group, n is 9)
- the whole amount of the monomer mixture was put into a dropping funnel, and the whole amount of the monomer mixture was dropped continuously for 1 hour while keeping the temperature of the solution at 75 ° C. After completion of dropping, 0.02 g of ammonium persulfate (manufactured by Tokyo Chemical Industry Co., Ltd.) was added, and the temperature of the solution was kept at 80 ° C. and reacted for 1.5 hours.
- the reactor was cooled to 25 ° C. to obtain an emulsion 7 in which the (meth) acrylic acid copolymer was dispersed in water.
- concentration of the (meth) acrylic-acid type copolymer in the emulsion 7 was 30.0 mass%.
- Example 8 In a 100 mL beaker equipped with a stirrer capable of sealing, 25 g of ethyl acrylate (manufactured by Tokyo Chemical Industry Co., Ltd.), 17 g of methacrylic acid (manufactured by Tokyo Chemical Industry Co., Ltd.), methacrylic acid (polyoxyethylene (9) stearyl ether) 3.6 g of ester (manufactured by NOF Corporation, trade name: Blemmer PSE400, in general formula (I), R is methyl group, n is 9) was charged and stirred at 25 ° C. for 30 minutes to obtain a monomer mixture.
- ethyl acrylate manufactured by Tokyo Chemical Industry Co., Ltd.
- methacrylic acid manufactured by Tokyo Chemical Industry Co., Ltd.
- methacrylic acid polyoxyethylene (9) stearyl ether
- ester manufactured by NOF Corporation, trade name: Blemmer PSE400, in general formula (I), R is methyl group, n is 9)
- the whole amount of the monomer mixture was put into a dropping funnel, and the whole amount of the monomer mixture was dropped continuously for 1 hour while keeping the temperature of the solution at 75 ° C. After completion of dropping, 0.02 g of ammonium persulfate (manufactured by Tokyo Chemical Industry Co., Ltd.) was added, and the temperature of the solution was kept at 80 ° C. and reacted for 1.5 hours.
- the reactor was cooled to 25 ° C. to obtain an emulsion 8 in which the (meth) acrylic acid copolymer was dispersed in water.
- concentration of the (meth) acrylic-acid type copolymer in the emulsion 8 was 30.5 mass%.
- the whole amount of the monomer mixture was put into a dropping funnel, and the whole amount of the monomer mixture was dropped continuously for 1 hour while keeping the temperature of the solution at 75 ° C. After completion of dropping, 0.02 g of ammonium persulfate (manufactured by Tokyo Chemical Industry Co., Ltd.) was added, and the temperature of the solution was kept at 80 ° C. and reacted for 1.5 hours.
- the reactor was cooled to 25 ° C. to obtain an emulsion 9 in which the (meth) acrylic acid copolymer was dispersed in water.
- concentration of the (meth) acrylic-acid type copolymer in the emulsion 9 was 29.6 mass%.
- the whole amount of the monomer mixture was put into a dropping funnel, and the whole amount of the monomer mixture was dropped continuously for 1 hour while keeping the temperature of the solution at 85 ° C. After completion of dropping, 0.02 g of ammonium persulfate (manufactured by Tokyo Chemical Industry Co., Ltd.) was added, and the temperature of the solution was kept at 90 ° C. and reacted for 1.5 hours.
- the reactor was cooled to 25 ° C. to obtain an emulsion 10 in which the (meth) acrylic acid copolymer was dispersed in water.
- concentration of the (meth) acrylic-acid type copolymer in the emulsion 10 was 31.1 mass%.
- Viscosity at 25 ° C. Viscosity A
- a 1% by mass aqueous solution of a (meth) acrylic acid copolymer is adjusted to pH 7.5 with a 6% by mass aqueous sodium hydroxide solution
- ion-exchanged water is charged, and an emulsion in which the (meth) acrylic acid-based copolymer obtained in Examples or Comparative Examples is dispersed in water is dropped, and a (meth) acrylic acid-based liquid is added.
- the concentration of the copolymer After adjusting the concentration of the copolymer to 1% by mass, the mixture was stirred for 5 minutes to obtain a uniform solution.
- 6 mass% sodium hydroxide aqueous solution was added, pH was adjusted to 7.5, and the sample for a measurement was prepared.
- Table 1 shows an outline of preparation of each measurement sample.
- the (meth) acrylic acid copolymer not copolymerized with the methacrylic acid (polyoxyethylene stearyl ether) ester of Comparative Example 1 has a low viscosity.
- the (meth) acrylic acid copolymer obtained by copolymerizing a hydrophobic monomer other than the methacrylic acid (polyoxyethylene stearyl ether) ester of Comparative Example 2 is an aqueous solution containing polyoxyethylene (2) sodium lauryl sulfate. It can be seen that when prepared (viscosity B), the viscosity becomes lower than that of Example 3 in which the same amount of hydrophobic monomer is added. Moreover, it turns out that the viscosity reduction rate is also high.
- Example 4 is the value of the viscosity B.
- the (meth) acrylic acid copolymer not copolymerized with the methacrylic acid (polyoxyethylene stearyl ether) ester of Comparative Example 1 was prepared as an aqueous solution containing polyoxyethylene (2) sodium lauryl sulfate.
- polyoxyethylene (2) sodium lauryl sulfate In order to make the viscosity 10,000 mPa ⁇ s, 4 mass% is necessary. That is, the (meth) acrylic acid copolymer according to the present invention can be used to prepare an appropriate high viscosity aqueous solution with a small amount of use.
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Abstract
Description
該(メタ)アクリル酸系共重合体の1質量%水溶液を、6質量%水酸化ナトリウム水溶液によりpH7.5に調整した際の25℃における粘度が、1,000~100,000mPa・sであり、
該(メタ)アクリル酸系共重合体1質量%、および、ポリオキシエチレン(2)ラウリル硫酸ナトリウム5.3質量%を含み、6質量%水酸化ナトリウムによりpHを7~7.5に調整した水溶液の25℃における粘度が、500~50,000mPa・sである。
前記界面活性剤の使用割合は、前記水100質量部に対して、好ましくは0.1~10質量部であり、より好ましくは0.3~3質量部であり、さらに好ましくは0.5~2質量部である。界面活性剤の使用割合が0.1質量部未満の場合、重合の際に単量体である(メタ)アクリル酸、(メタ)アクリル酸アルキルエステル、(メタ)アクリル酸(ポリオキシエチレンステアリルエーテル)エステルが水に均一に乳化されず、重合が不均一に進行し、得られる(メタ)アクリル酸系共重合体が所望の粘度特性を発揮しない、あるいは生成する(メタ)アクリル酸系共重合体が分散されずに塊状物となり、製造困難となるおそれがある。また、界面活性剤の使用割合が10質量部を超える場合、使用量割合に対する乳化効果が得られず、経済的でない。
かくして、本発明にかかる(メタ)アクリル酸系共重合体が得られる。
なお、粘度については、25℃に設定した恒温槽で測定用サンプルを2時間静置させた後、同温度において、BH型回転粘度計を用いて測定した値であり、詳細は後述の方法にて測定した。
乳化重合反応で用いる界面活性剤の量を低く設定すると、得られる(メタ)アクリル酸系共重合体の粘度Aは低くなり、かつ、粘度Bが低くなる傾向がある。界面活性剤の量を高く設定すると、得られる(メタ)アクリル酸系共重合体の粘度Aは高くなり、かつ、粘度Bが高くなる傾向がある。
(メタ)アクリル酸、(メタ)アクリル酸アルキルエステル、および(メタ)アクリル酸(ポリオキシエチレンステアリルエーテル)エステルを含むモノマー混合物に含まれる(メタ)アクリル酸の割合を低く設定すると、得られる(メタ)アクリル酸系共重合体の粘度Aが低くなり、かつ、粘度Bが低くなる傾向がある。モノマー混合物に含まれる(メタ)アクリル酸の割合を高く設定すると、粘度Aが高くなり、かつ、粘度Bが高くなる傾向がある。
(メタ)アクリル酸、(メタ)アクリル酸アルキルエステル、および(メタ)アクリル酸(ポリオキシエチレンステアリルエーテル)エステルを含むモノマー混合物に含まれる(メタ)アクリル酸アルキルエステルの割合を低く設定すると、得られる(メタ)アクリル酸系共重合体の粘度Aが高くなり、かつ、粘度Bが高くなる傾向がある。モノマー混合液に含まれる(メタ)アクリル酸アルキルエステルの割合を高く設定すると、得られる(メタ)アクリル酸系共重合体の粘度Aが低くなり、かつ、粘度Bが低くなる傾向がある。
(メタ)アクリル酸、(メタ)アクリル酸アルキルエステル、および(メタ)アクリル酸(ポリオキシエチレンステアリルエーテル)エステルを含むモノマー混合物に含まれる(メタ)アクリル酸(ポリオキシエチレンステアリルエーテル)エステルの割合を低く設定すると、得られる(メタ)アクリル酸系共重合体の粘度Aが低くなり、かつ、粘度Bが低くなる傾向がある。モノマー混合物に含まれる(メタ)アクリル酸(ポリオキシエチレンステアリルエーテル)エステルの割合を高く設定すると、得られる(メタ)アクリル酸系共重合体の粘度Aが高くなり、かつ、粘度Bが高くなる傾向がある。
重合反応で用いる重合開始剤の量を低く設定すると、得られる(メタ)アクリル酸系共重合体の粘度Aが高く、かつ、粘度Bが高くなる傾向がある。重合開始剤の量を高く設定すると、得られる(メタ)アクリル酸系共重合体の粘度Aが低くなり、かつ、粘度Bが低くなる傾向がある。
なお、前記乳化重合法により得られる(メタ)アクリル酸系共重合体は、水に分散された状態で容易に得ることができる。
前記(メタ)アクリル酸系共重合体水分散体における、(メタ)アクリル酸系共重合体の含有割合(濃度)は、製造する上での操作性および輸送する際のコストの観点から、好ましくは5~50質量%であり、より好ましくは20~40質量%である。
本発明にかかる(メタ)アクリル酸系共重合体および(メタ)アクリル酸系共重合体水分散体を用いた増粘剤等は、特異な粘度特性により、界面活性剤存在下で、中性水溶液に、少量で高い増粘効果を付与することができることから、シャンプー、ボディウォッシュ、食器用洗剤、バスジェル、シャワージェル等の増粘剤等に使用することができる。
密栓可能な、攪拌機を備えた100mL容ビーカーに、アクリル酸エチル(東京化成工業株式会社製)25g、メタクリル酸(東京化成工業株式会社製)17g、メタクリル酸(ポリオキシエチレン(30)ステアリルエーテル)エステル(日油株式会社製、商品名:ブレンマーPSE1300、一般式(I)において、Rがメチル基、nが30)0.7gを仕込み、25℃で30分間攪拌してモノマー混合物を得た。
密栓可能な、攪拌機を備えた100mL容ビーカーに、アクリル酸エチル(東京化成工業株式会社製)25g、メタクリル酸(東京化成工業株式会社製)17g、メタクリル酸(ポリオキシエチレン(30)ステアリルエーテル)エステル(日油株式会社製、商品名:ブレンマーPSE1300、一般式(I)において、Rがメチル基、nが30)2.2gを仕込み、25℃で30分間攪拌してモノマー混合物を得た。
密栓可能な、攪拌機を備えた100mL容ビーカーに、アクリル酸エチル(東京化成工業株式会社製)25g、メタクリル酸(東京化成工業株式会社製)17g、メタクリル酸(ポリオキシエチレン(30)ステアリルエーテル)エステル(日油株式会社製、商品名:ブレンマーPSE1300、一般式(I)において、Rがメチル基、nが30)3.6gを仕込み、25℃で30分間攪拌してモノマー混合物を得た。
密栓可能な、攪拌機を備えた100mL容ビーカーに、アクリル酸エチル(東京化成工業株式会社製)25g、メタクリル酸(東京化成工業株式会社製)17g、メタクリル酸(ポリオキシエチレン(30)ステアリルエーテル)エステル(日油株式会社製、商品名:ブレンマーPSE1300、一般式(I)において、Rがメチル基、nが30)5.1gを仕込み、25℃で30分間攪拌してモノマー混合物を得た。
密栓可能な、攪拌機を備えた100mL容ビーカーに、アクリル酸エチル(東京化成工業株式会社製)25g、メタクリル酸(東京化成工業株式会社製)17g、メタクリル酸(ポリオキシエチレン(30)ステアリルエーテル)エステル(日油株式会社製、商品名:ブレンマーPSE1300、一般式(I)において、Rがメチル基、nが30)7.3gを仕込み、25℃で30分間攪拌してモノマー混合物を得た。
密栓可能な、攪拌機を備えた100mL容ビーカーに、アクリル酸エチル(東京化成工業株式会社製)25g、メタクリル酸(東京化成工業株式会社製)17g、メタクリル酸(ポリオキシエチレン(30)ステアリルエーテル)エステル(日油株式会社製、商品名:ブレンマーPSE1300、一般式(I)において、Rがメチル基、nが30)10.9gを仕込み、25℃で30分間攪拌してモノマー混合物を得た。
密栓可能な、攪拌機を備えた100mL容ビーカーに、アクリル酸エチル(東京化成工業株式会社製)25g、メタクリル酸(東京化成工業株式会社製)17g、メタクリル酸(ポリオキシエチレン(9)ステアリルエーテル)エステル(日油株式会社製、商品名:ブレンマーPSE400、一般式(I)において、Rがメチル基、nが9)1.6gを仕込み、25℃で30分間攪拌してモノマー混合物を得た。
密栓可能な、攪拌機を備えた100mL容ビーカーに、アクリル酸エチル(東京化成工業株式会社製)25g、メタクリル酸(東京化成工業株式会社製)17g、メタクリル酸(ポリオキシエチレン(9)ステアリルエーテル)エステル(日油株式会社製、商品名:ブレンマーPSE400、一般式(I)において、Rがメチル基、nが9)3.6gを仕込み、25℃で30分間攪拌してモノマー混合物を得た。
密栓可能な、攪拌機を備えた100mL容ビーカーに、アクリル酸エチル(東京化成工業株式会社製)25g、メタクリル酸(東京化成工業株式会社製)17gを仕込み、25℃で30分間攪拌してモノマー混合物を得た。
密栓可能な、攪拌機を備えた100mL容ビーカーに、アクリル酸エチル(東京化成工業株式会社製)25g、メタクリル酸(東京化成工業株式会社製)15.2g、エトキシ化ベヘニルメタクリレート(Rhodia社製、商品名:SIPOMER BEM、組成比=〔CH2=CCH3C(O)-(OCH2CH2)25-OC22H45〕:50質量%、メタクリル酸:25質量%、水:25質量%)7.2gを仕込み、25℃で30分間攪拌してモノマー混合物を得た。
(1)(メタ)アクリル酸系共重合体の1質量%水溶液を、6質量%水酸化ナトリウム水溶液によりpH7.5に調整した際の25℃における粘度(粘度A)
攪拌機を備えた200mL容のビーカーに、イオン交換水を仕込み、実施例または比較例により得られた(メタ)アクリル酸系共重合体が水に分散したエマルションを滴下し、(メタ)アクリル酸系共重合体の濃度を1質量%に調整した後、5分間攪拌して均一溶液とした。次に、6質量%水酸化ナトリウム水溶液を添加してpHを7.5に調整し、測定用サンプルを調製した。なお、各測定サンプルの調製概略を表1に示す。
攪拌機を備えた200mL容のビーカーに、イオン交換水、新日本理化株式会社製の商品名:シノリンSPE1200K(ポリオキシエチレン(2)ラウリル硫酸ナトリウムを26.5質量%含有)を仕込み、実施例または比較例により得られた(メタ)アクリル酸系共重合体が水に分散したエマルションを滴下し、5分間攪拌して均一溶液とした。次に、6質量%水酸化ナトリウム水溶液を添加してpHを7~7.5に調整し、(メタ)アクリル酸系共重合体を1質量%含む測定用サンプルを調製した。なお、各測定サンプルの調製概略を表2に示す。
攪拌機を備えた200mL容のビーカーに、イオン交換水、新日本理化株式会社製の商品名:シノリンSPE1200K(ポリオキシエチレン(2)ラウリル硫酸ナトリウムを26.5質量%含有)を仕込み、比較例1により得られた(メタ)アクリル酸系共重合体が水に分散したエマルションを滴下し、5分間攪拌して均一溶液とした。次に、6質量%水酸化ナトリウム水溶液を添加してpHを7~7.5に調整し、(メタ)アクリル酸系共重合体を4質量%含む測定用サンプルを調製した。なお、各測定サンプルの調製概略を表4に示す。
Claims (6)
- (メタ)アクリル酸、アルキル基の炭素数が1~4である(メタ)アクリル酸アルキルエステル、および、一般式(I):
該(メタ)アクリル酸系共重合体の1質量%水溶液を、6質量%水酸化ナトリウム水溶液によりpH7.5に調整した際の25℃における粘度が、1,000~100,000mPa・sであり、
該(メタ)アクリル酸系共重合体1質量%、および、ポリオキシエチレン(2)ラウリル硫酸ナトリウム5.3質量%を含み、6質量%水酸化ナトリウムによりpHを7~7.5に調整した水溶液の25℃における粘度が、500~50,000mPa・sである、
(メタ)アクリル酸系共重合体。 - (メタ)アクリル酸(ポリオキシエチレンステアリルエーテル)エステルの一般式(I)におけるnが、20~40である請求項1に記載の(メタ)アクリル酸系共重合体。
- アルキル基の炭素数が1~4である(メタ)アクリル酸アルキルエステルが、(メタ)アクリル酸エチルである請求項1または2に記載の(メタ)アクリル酸系共重合体。
- (メタ)アクリル酸(ポリオキシエチレンステアリルエーテル)エステルの使用割合が、(メタ)アクリル酸およびアルキル基の炭素数が1~4である(メタ)アクリル酸アルキルエステルの総量100質量部に対して、2~26質量部である請求項1~3のいずれか1項に記載の(メタ)アクリル酸系共重合体。
- アルキル基の炭素数が1~4である(メタ)アクリル酸アルキルエステルの使用割合が、(メタ)アクリル酸100質量部に対して、70~900質量部である請求項1~4のいずれか1項に記載の(メタ)アクリル酸系共重合体。
- 請求項1~5のいずれか1項に記載の(メタ)アクリル酸系共重合体が水に分散した、(メタ)アクリル酸系共重合体水分散体。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12790025.6A EP2716664A4 (en) | 2011-05-24 | 2012-04-25 | COPOLYMER ON (METH) ACRYLIC ACID BASE |
JP2013516263A JPWO2012160933A1 (ja) | 2011-05-24 | 2012-04-25 | (メタ)アクリル酸系共重合体 |
CN201280024690.3A CN103562241A (zh) | 2011-05-24 | 2012-04-25 | (甲基)丙烯酸系共聚物 |
CA2836718A CA2836718A1 (en) | 2011-05-24 | 2012-04-25 | (meth) acrylic acid-based copolymer |
US14/119,818 US20140100327A1 (en) | 2011-05-24 | 2012-04-25 | (meth)acrylic acid-based copolymer |
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JP2011-116096 | 2011-05-24 | ||
JP2011116096 | 2011-05-24 |
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WO2012160933A1 true WO2012160933A1 (ja) | 2012-11-29 |
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Family Applications (1)
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PCT/JP2012/061088 WO2012160933A1 (ja) | 2011-05-24 | 2012-04-25 | (メタ)アクリル酸系共重合体 |
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US (1) | US20140100327A1 (ja) |
EP (1) | EP2716664A4 (ja) |
JP (1) | JPWO2012160933A1 (ja) |
CN (1) | CN103562241A (ja) |
CA (1) | CA2836718A1 (ja) |
WO (1) | WO2012160933A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016503086A (ja) * | 2012-12-20 | 2016-02-01 | コアテツクス | 懸濁粒子を含む安定な水性組成物を得るためのポリマー基剤 |
JP2016169286A (ja) * | 2015-03-12 | 2016-09-23 | Dic株式会社 | 水性顔料分散体および水性インク |
JP2019209325A (ja) * | 2018-06-04 | 2019-12-12 | 三洋化成工業株式会社 | 水処理剤及び水処理方法 |
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KR102302292B1 (ko) | 2014-06-13 | 2021-09-16 | 지피 이노바토 사이프러스 엘티디 | 맞춤형 치과용 임플란트 어버트먼트 및 임프레션 포스트 용 몰드 |
EP3474772B1 (en) | 2016-06-24 | 2020-04-22 | VP Innovato Holdings Ltd. | Dental tools system and method |
GR20170100383A (el) | 2017-08-21 | 2019-04-22 | Vp Innovato Holdings Ltd | Πυρηνας οδοντικου κολοβωματος και μεθοδος για την κατασκευη ενος οδοντικου κολοβωματος |
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CA1188043A (en) * | 1978-12-29 | 1985-05-28 | Ching-Jen Chang | Methacrylic acid emulsion copolymers for thickening purposes |
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2012
- 2012-04-25 CA CA2836718A patent/CA2836718A1/en not_active Abandoned
- 2012-04-25 JP JP2013516263A patent/JPWO2012160933A1/ja active Pending
- 2012-04-25 US US14/119,818 patent/US20140100327A1/en not_active Abandoned
- 2012-04-25 CN CN201280024690.3A patent/CN103562241A/zh active Pending
- 2012-04-25 EP EP12790025.6A patent/EP2716664A4/en not_active Withdrawn
- 2012-04-25 WO PCT/JP2012/061088 patent/WO2012160933A1/ja active Application Filing
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JPS55108411A (en) * | 1978-12-29 | 1980-08-20 | Rohm & Haas | Waterrinsoluble emulsion copolymer |
JPS5989313A (ja) | 1982-09-30 | 1984-05-23 | ローム・アンド・ハース・カンパニー | 増粘用アルキルアクリルアミド含有エマルジヨンコポリマ− |
JPS60170673A (ja) * | 1984-02-14 | 1985-09-04 | Nippon Oil & Fats Co Ltd | 水と接触する材料用被覆剤 |
JPS61228081A (ja) * | 1985-02-04 | 1986-10-11 | ロ−ム・アンド・ハ−ス・カンパニ− | 疎水性物質を含有するアルカリ可溶又はアルカリ膨潤性エマルジヨン共重合体の改善製造方法 |
JPH11152411A (ja) * | 1997-07-29 | 1999-06-08 | Rohm & Haas Co | 溶解された疎水的に変性されたアルカリ可溶性エマルジョンポリマー |
JP2009001776A (ja) * | 2007-06-11 | 2009-01-08 | Rohm & Haas Co | 水性エマルジョンポリマー会合性増粘剤 |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016503086A (ja) * | 2012-12-20 | 2016-02-01 | コアテツクス | 懸濁粒子を含む安定な水性組成物を得るためのポリマー基剤 |
JP2016169286A (ja) * | 2015-03-12 | 2016-09-23 | Dic株式会社 | 水性顔料分散体および水性インク |
JP2019209325A (ja) * | 2018-06-04 | 2019-12-12 | 三洋化成工業株式会社 | 水処理剤及び水処理方法 |
JP7152359B2 (ja) | 2018-06-04 | 2022-10-12 | 三洋化成工業株式会社 | 水処理剤及び水処理方法 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2012160933A1 (ja) | 2014-07-31 |
EP2716664A1 (en) | 2014-04-09 |
CA2836718A1 (en) | 2012-11-29 |
EP2716664A4 (en) | 2014-12-10 |
CN103562241A (zh) | 2014-02-05 |
US20140100327A1 (en) | 2014-04-10 |
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