WO2022014548A1 - 樹脂分散組成物 - Google Patents
樹脂分散組成物 Download PDFInfo
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- WO2022014548A1 WO2022014548A1 PCT/JP2021/026203 JP2021026203W WO2022014548A1 WO 2022014548 A1 WO2022014548 A1 WO 2022014548A1 JP 2021026203 W JP2021026203 W JP 2021026203W WO 2022014548 A1 WO2022014548 A1 WO 2022014548A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0869—Acids or derivatives thereof
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D123/04—Homopolymers or copolymers of ethene
- C09D123/08—Copolymers of ethene
- C09D123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C09D123/0869—Acids or derivatives thereof
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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
- C08F8/00—Chemical modification by after-treatment
- C08F8/44—Preparation of metal salts or ammonium salts
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
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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
- C08K3/28—Nitrogen-containing compounds
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/08—Homopolymers or copolymers of acrylic acid esters
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/10—Homopolymers or copolymers of methacrylic acid esters
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/02—Emulsion paints including aerosols
- C09D5/024—Emulsion paints including aerosols characterised by the additives
- C09D5/027—Dispersing agents
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/14—Carboxylic acids; Derivatives thereof
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/12—Coatings without pigments applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2333/00—Characterised by the use of homopolymers or 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 of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/54—Aqueous solutions or dispersions
Definitions
- an aqueous dispersion of an olefin / ⁇ , ⁇ -unsaturated carboxylic acid copolymer is used as a coating agent for paper.
- the paper coated with the aqueous dispersion can be a coated paper having excellent heat-sealing properties and dissociation properties.
- the olefin / ⁇ , ⁇ -unsaturated carboxylic acid copolymer becomes easier to disperse in water as the amount of ⁇ , ⁇ -unsaturated carboxylic acid increases, while the larger the amount of ⁇ , ⁇ -unsaturated carboxylic acid.
- the melting point is lowered, the crystallinity is lowered, and as a result, the blocking resistance tends to be poor (easy to block).
- the dispersion in which the copolymer is dispersed in water using an alkali metal compound is relatively ⁇ , ⁇ -unsaturated carboxylic acid. Since it is easy to produce an aqueous dispersion of an olefin / ⁇ , ⁇ -unsaturated carboxylic acid copolymer having a low amount and a large crystallinity, the restrictions on the raw material polymer are relatively loose, so that it is the widest. in use.
- the coated paper obtained by applying this dispersion to a base material has a problem in water resistance, so it is difficult to use it as it is for applications requiring water resistance.
- coated paper obtained by coating a dispersion liquid in which the copolymer is dispersed in water with ammonia has an advantage of being relatively excellent in water resistance, but ⁇ , ⁇ -unsaturated carboxylic acid.
- a small amount of olefin / ⁇ , ⁇ -unsaturated carboxylic acid copolymer is difficult to disperse in water with ammonia.
- the present invention aims to obtain an aqueous dispersion by dispersing an olefin / ⁇ , ⁇ -unsaturated carboxylic acid copolymer having a relatively small amount of ⁇ , ⁇ -unsaturated carboxylic acid in water using ammonia. Et al. Repeated their studies.
- the present inventors have specified a specific olefin / ⁇ , ⁇ -unsaturated carboxylic acid copolymer having a relatively small amount of ⁇ , ⁇ -unsaturated carboxylic acid even when dispersed in water using ammonia. We found the possibility of obtaining an aqueous dispersion by using the amount, and made further improvements.
- Item 1 An aqueous dispersion composition of a copolymer containing ⁇ , ⁇ -unsaturated carboxylic acid or an ester thereof as a constituent unit, which contains ammonia.
- the amount of heat of crystallization of the copolymer is -30 J / g or less, and the amount of crystallization is -30 J / g or less.
- the copolymer is contained in an amount of 10 to 50% by mass.
- Composition Item 2.
- Item 2. The composition according to Item 1, wherein the copolymer has an average particle size of 0.01 to 1 ⁇ m.
- Item 6. The composition according to any one of Items 1 to 3, which is a coating composition.
- Item 5. A high-quality paper with a paper basis weight of 200 to 220 g / m 2 is coated so that the coating film thickness is 5 ⁇ m, dried with hot air at 100 ° C. for 5 minutes, and 24 hours after drying, the Cobb method.
- Item 4. The composition according to any one of Items 1 to 4, wherein the water absorption degree measured by setting the contact time between the coated paper and water to 5 minutes is 10 g / m 2 or less.
- the ⁇ , ⁇ -unsaturated carboxylic acid is at least one selected from the group consisting of acrylic acid, methacrylic acid, crotonic acid, maleic acid, fumaric acid, and itaconic acid.
- Item 6 The composition according to any one of Items 1 to 5, wherein the ester of the ⁇ , ⁇ -unsaturated carboxylic acid is an alkyl ester having 1 to 10 carbon atoms of the ⁇ , ⁇ -unsaturated carboxylic acid.
- composition according to Item 8 wherein the ethylene / ⁇ , ⁇ -unsaturated carboxylic acid copolymer is an ethylene / (meth) acrylic acid copolymer.
- Item 10 A laminate having a paper base and a film on the paper base. The film is formed by using the composition according to any one of Items 1 to 9. Laminated body.
- Item 11a (1) At least a copolymer having a calorific value of -30 J / g or less and containing ⁇ , ⁇ -unsaturated carboxylic acid or an ester thereof as a constituent unit, ammonia, and water. The concentration of the copolymer is 30 to 60% by mass.
- Ammonia should be 70 mol% or more based on the amount of carboxyl groups of the copolymer.
- Mixing including, A method for producing an aqueous dispersion composition of a copolymer containing ⁇ , ⁇ -unsaturated carboxylic acid or an ester thereof as a constituent unit. Item 11b. Further, (2) pressurizing the mixture obtained in step (1) at 0.1 to 2 MPa. including, Item 11. The method for producing an aqueous dispersion composition according to Item 11a. Item 12. Moreover, (3) The copolymer concentration is adjusted to 10 to 50% by mass by further adding water after pressurization. Item 11b. The method for producing an aqueous dispersion composition.
- aqueous dispersion by dispersing an olefin / ⁇ , ⁇ -unsaturated carboxylic acid copolymer having a relatively small amount of ⁇ , ⁇ -unsaturated carboxylic acid in water using ammonia. Further, the aqueous dispersion is provided.
- the present inventors obtain coated paper having excellent not only water resistance but also blocking resistance and dissociation resistance (and thus recyclability) by coating the paper using the dispersion liquid as a coating agent. I also found that I could do it. Therefore, the coated paper is also provided.
- the present disclosure preferably includes, but is not limited to, an aqueous dispersion composition of a copolymer containing ⁇ , ⁇ -unsaturated carboxylic acid or an ester thereof as a constituent unit, and a method for producing the same. Includes everything disclosed herein and recognizable by those of skill in the art.
- a copolymer containing ⁇ , ⁇ -unsaturated carboxylic acid or an ester thereof as a constituent unit may be referred to as a copolymer (A).
- the aqueous dispersion composition of the copolymer (A) included in the present disclosure contains the copolymer (A) in an amount of 10% by mass or more (preferably 10 to 50% by mass).
- the aqueous dispersion composition included in the present disclosure may be referred to as "the composition of the present disclosure”.
- the copolymer (A) is a copolymer containing one or more ⁇ , ⁇ -unsaturated carboxylic acids as a constituent unit, and is, for example, (i) one or more ⁇ , ⁇ -unmodified. It may be a polymer of a saturated carboxylic acid or an ester thereof and one or more kinds of ⁇ , ⁇ -unsaturated carboxylic acid or a monomer other than the ester thereof, and (ii) two or more kinds of ⁇ , ⁇ . -It may be a polymer of unsaturated carboxylic acid or an ester thereof.
- Examples of the ⁇ , ⁇ -unsaturated carboxylic acid include acrylic acid, methacrylic acid, crotonic acid, maleic acid, fumaric acid, itaconic acid and the like. Of these, (meth) acrylic acid (ie, methacrylic acid and / or acrylic acid) is more preferred.
- Examples of the ester of the ⁇ , ⁇ -unsaturated carboxylic acid include an alkyl ester having 1 to 10 carbon atoms (1, 2, 3, 4, 5, 6, 7, 8, 9, or 10). The alkyl moiety of the alkyl ester may be straight chain or branched chain.
- ⁇ , ⁇ -unsaturated carboxylic acid ester examples include methyl ester, ethyl ester, butyl (particularly n-butyl) ester, and 2-ethylhexyl ester.
- examples of the ⁇ , ⁇ -unsaturated carboxylic acid ester include 2-methylaminoethyl ester and hydroxyethyl ester (particularly 2-hydroxyethyl ester).
- the ester of ⁇ , ⁇ -unsaturated carboxylic acid methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate and the like are more preferable.
- Examples of monomers other than ⁇ , ⁇ -unsaturated carboxylic acid or its ester include ethylene, propylene, butene, isobutylene, butadiene, isoprene, and styrene.
- the copolymer (A) includes, for example, a copolymer of ethylene / ⁇ , ⁇ -unsaturated carboxylic acid or an ester thereof, and a co-polymer of styrene / ⁇ , ⁇ -unsaturated carboxylic acid or an ester thereof. Polymers and the like are preferably mentioned. Of these, ethylene / ⁇ , ⁇ -unsaturated carboxylic acid copolymers are more preferable.
- ethylene / (meth) acrylic acid copolymer ethylene / (meth) acrylic acid copolymer, styrene / (meth) acrylic acid ester copolymer, styrene / (meth) acrylic acid / (meth) acrylic acid ester copolymer, etc.
- an ethylene / ⁇ , ⁇ -unsaturated carboxylic acid copolymer is preferable.
- an ethylene / (meth) acrylic acid copolymer is particularly preferable.
- the copolymer (A) can be used alone or in combination of two or more.
- the copolymer (A) is a copolymer having a crystallization calorific value of ⁇ 30 J / g or less, preferably a copolymer of ⁇ 60 to ⁇ 30 J / g.
- the upper or lower limit of the range (-60 to -30 J / g) is, for example, -59, -58, -57, -56, -55, -54, -53, -52, -51, -50, -49.
- the range may be ⁇ 55 to ⁇ 35 J / g.
- the amount of the carboxylic acid or the ester thereof In a polymer having a carboxylic acid or an ester thereof (particularly a copolymer containing ⁇ , ⁇ -unsaturated carboxylic acid or an ester thereof as a constituent unit) such as the copolymer (A), the amount of the carboxylic acid or the ester thereof The smaller the amount, the lower the calorific value of crystallization tends to be, and the larger the amount of the carboxylic acid or its ester, the easier the aqueous dispersion tends to be. Therefore, it can be said that when the amount of heat for crystallization is low, it tends to be difficult to disperse in water.
- composition of the present disclosure is an aqueous dispersion composition in which the copolymer is well dispersed even though the amount of heat of crystallization is as low as -30 J / g or less and therefore the copolymer is difficult to disperse in water. be.
- the crystal can be crystallized by adjusting the amount of the carboxylic acid or the ester thereof.
- a copolymer having a calorific value of ⁇ 30 J / g or less can be obtained. That is, among the monomers used in the synthesis of the copolymer, the amount of the monomer having a carboxylic acid or an ester thereof in the side chain (more specifically, ⁇ , ⁇ -unsaturated carboxylic acid or an ester thereof) is adjusted to form a crystal.
- a copolymer having a calorific value of ⁇ 30 J / g or less can be obtained.
- the amount of heat of crystallization of the copolymer (A) is the point where the DSC curve deviates from the baseline on the high temperature side and the point where the DSC curve returns to the baseline on the low temperature side again when the temperature is lowered from 200 ° C to 0 ° C. It is calculated from the area of the part surrounded by the straight line connecting the DSC curve and the DSC curve.
- the copolymer (A) preferably has a melt index (190 ° C., 2160 g load) of about 50 to 400, preferably about 60 to 300. Further, a melting point of about 85 to 100 ° C. is preferable.
- the upper or lower limit of the range (85 to 100 ° C.) may be, for example, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, or 99 ° C. For example, the range may be 88 to 98 ° C.
- the melting point is measured by differential scanning calorimetry.
- the copolymer (A) can be prepared by a known method or a method that can be easily conceived from a known method. It is also possible to purchase and use a commercially available product. For example, a commercially available product of an ethylene / ⁇ , ⁇ -unsaturated carboxylic acid copolymer can be purchased and used. Examples of commercially available products include Nucrel N1860, Nucrel N1530H, Nucrel N1560 (manufactured by Mitsui Dow Polychemical Co., Ltd.) and the like.
- the carboxyl group (derived from ⁇ , ⁇ -unsaturated carboxylic acid) contained in the copolymer (A) is appropriately neutralized.
- the hydrophilicity is relatively low, and when the carboxyl group is in the salt state, the hydrophilicity is relatively high. Therefore, by neutralizing with a base, the neutralized carboxyl group in the copolymer acts as an emulsifier, and an aqueous dispersion can be produced relatively easily.
- ammonia is used as the base for the neutralization.
- Ammonia can also be used in the form of, for example, ammonia gas or an aqueous solution of ammonia.
- organic amines and alkali metal hydroxides may be further used as long as the effects of the above-mentioned compositions of the present disclosure are not impaired, but these components are the compositions of the present disclosure. It is preferable that it is not contained in the product.
- organic amine include methylamine, ethylamine, diethylamine, diethanolamine, triethanolamine and the like.
- alkali metal hydroxide include sodium hydroxide, potassium hydroxide, lithium hydroxide and the like.
- composition of the present disclosure does not contain alcohol.
- the copolymer (A) preferably has a unit content derived from ⁇ , ⁇ -unsaturated carboxylic acid of, for example, about 2 to 15 mol%.
- the upper or lower limit of the range may be, for example, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, or 14 mol%.
- the range may be about 3 to 12 mol%.
- the ⁇ , ⁇ -unsaturated carboxylic acid-derived unit content in the copolymer (A) can be determined by neutralization titration. More specifically, it can be obtained as follows. Add 0.5 g of the copolymer (A) and 70 mL of xylene to the flask, and heat with a hot stirrer at 150 ° C. for 15 minutes to dissolve. After dissolution, allow to cool, and add 20 mL of ethanol and 3 drops of phenolphthalein (ethanol solution) at about 90 ° C. Titration is performed using 0.1N potassium hydroxide (ethanol solution), and the point at which a slight red color is developed for 30 seconds is defined as the end point.
- the unsaturated carboxylic acid content is determined by the following formula.
- Unsaturated carboxylic acid content [(V1-V0) x N x E] x 100 / W
- E: Unsaturated carboxylic acid molecular weight Xg / mmol (As an example, acrylic acid: X 0.07206, methacrylic acid: 0.08609)
- W Sample weight (g)
- the copolymer (A) when the copolymer (A) is an ethylene / ⁇ , ⁇ -unsaturated carboxylic acid copolymer, it has a non-polar property derived from the ethylene unit and a polar property derived from the ⁇ , ⁇ -unsaturated carboxylic acid.
- the unit content derived from ⁇ , ⁇ -unsaturated carboxylic acid is, for example, about 2 to 15 mol%.
- the average particle size of the copolymer (A) in the composition of the present disclosure is preferably 1 ⁇ m or less or less than 1 ⁇ m.
- the lower limit of the average particle size is not particularly limited, but for example, 0.01 ⁇ m or more is exemplified, and 0.1 ⁇ m or more is preferable.
- the upper or lower limit of the average particle size range (0.01 to 1 ⁇ m) is 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.2, 0.
- the range may be 0.1 to 0.7 ⁇ m.
- the average particle size is a value measured by a dynamic light scattering type particle size distribution measurement method (Z-Average (hydrodynamic diameter)). That is, it is a value obtained by measuring the aqueous dispersion composition of the copolymer (A) with a dynamic light scattering type particle size distribution measuring device.
- the measuring device include Zetasizer Nano ZS manufactured by Malven. More specifically, 50 ml of distilled water is placed in a 100 ml beaker, 0.02 g of the aqueous dispersion composition of the copolymer to be measured is added thereto, and the mixture is dispersed while stirring with a spatula, and dynamic light is applied. Measure with a scattering type particle size distribution measuring device.
- the copolymer (A) content in the composition of the present disclosure is preferably 10 to 50% by mass.
- the upper or lower limit of the range is, for example, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, It may be 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, or 49% by mass.
- the range may be 15 to 45% by mass.
- the composition of the present disclosure preferably has a viscosity at 25 ° C. of 1000 mPa ⁇ s or less.
- the lower limit of the viscosity is not particularly limited, and examples thereof include 10 mPa ⁇ s or more.
- the upper or lower limit of the range (10 to 1000 Pa ⁇ s) is 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190. , 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300, 310, 320, 330, 340, 350, 360, 370, 380, 390, 400, 410, 420, 430, 440.
- the range may be, for example, 20-800 mPa ⁇ s.
- the viscosity of the composition of the present disclosure is measured using a BH type rotational viscometer. Specifically, the rotation speed of the spindle rotor is set to 60 rotations per minute, and at 25 ° C., the rotor No. 3 is used to measure the viscosity by reading the viscosity value 1 minute after the start of rotation of the rotor. The rotor is appropriately set according to the viscosity. As a guide, if it is less than 2000 mPa ⁇ s, the rotor No. 3. If it is 2000 mPa ⁇ s or more and less than 5000 mPa ⁇ s, the rotor No.
- the rotor No. If it is 45,000 mPa ⁇ s or more and less than 15,000 mPa ⁇ s, the rotor No. In the case of 5, 15,000 mPa ⁇ s or more and less than 40,000 mPa ⁇ s, the rotor No. In the case of 6, 40,000 mPa ⁇ s or more, the rotor No. 7.
- Water is preferable as the aqueous medium of the composition of the present disclosure, and various types of water such as tap water, industrial water, ion-exchanged water, deionized water, and pure water can be used. Deionized water or pure water is particularly preferable.
- composition of the present disclosure may contain other components as long as the effect is not impaired.
- defoamers viscosity regulators, pH regulators, surfactants, antifungal agents, etc., and if necessary, antioxidants, fatty acid amides, waxes, blocking improvers such as silicone oil, alcohols, etc. May include.
- composition of the present disclosure is useful as, for example, a binder or a coating agent.
- the compositions of the present disclosure can be, for example, applied onto a base and dried to form a film.
- a base for example, paper is preferably mentioned, and food and drink wrapping paper is more preferably mentioned.
- the film can prevent food and drink from coming into direct contact with the paper (wrapping paper). Further, the film is preferable because it has little adverse effect on food and drink.
- the present disclosure also includes, for example, a laminate comprising a paper base and a film on the paper base, wherein the film is formed using the composition of the present disclosure. Preferably included.
- the composition of the present disclosure is coated on high-quality paper having a paper basis weight of 200 to 220 g / m 2 so that the coating film thickness is 5 ⁇ m, and dried in a hot air dryer at 100 ° C. for 5 minutes.
- the water absorption (g / m 2 ) measured by the Cobb method using a water absorption tester (contact time between coated paper and water is 5 minutes) is 10 or less. It is preferably 5 or less, and more preferably 0.01 to 5 or less.
- the upper or lower limit of the range (0.01 to 5 g / m 2 ) is, for example, 0.05, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4.
- the copolymer (A), ammonia, and water are mixed in a specific amount, and if necessary, pressurized and / or heated, and the copolymer has a specific concentration. It can be prepared by diluting with water so that it becomes.
- the concentration of the copolymer (A) is preferably about 30 to 60% by mass.
- the upper or lower limit of the concentration range is, for example, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50. , 51, 52, 53, 54, 55, 56, 57, 58, or 59% by weight.
- the concentration range may be 35 to 55% by mass.
- ammonia is preferably used in an amount of 70 mol% or more, more preferably 70 to 300 mol%, based on the amount of carboxyl groups (100 mol%) of the copolymer (A).
- the upper or lower limit of the range (70 to 300 mol%) is, for example, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 155, 160, 165, 170, 175, 180, 185, 190, 195, 200, 205, 210, 215, 220, 225, 230, 235, 240, 245, 250, 255, 260, 265, 270, 275, 280, It may be 285, 290, or 295 mol%.
- the range may be 80-250 mol%. It is preferable to mix ammonia by mixing ammonia water.
- the copolymer (A) used for preparing the composition of the present disclosure is an olefin / ⁇ , ⁇ -unsaturated carboxylic acid copolymer, and the unsaturated polymer used for preparing the copolymer is unsaturated.
- the amount of carboxylic acid is 1 mol, if 2 mol of ammonia is used, it means that 200 mol% of ammonia is used with respect to the amount of carboxyl groups contained in the copolymer (A).
- the mixture obtained by mixing the copolymer (A), ammonia, and water is pressurized.
- the mixture is preferably pressurized while being mixed (eg, stirred).
- the pressurization is preferably, for example, about 0.1 to 2 MPa.
- the upper or lower limit of the range is, for example, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1. It may be 2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, or 1.9 MPa.
- the range may be 0.2 to 1.5 MPa.
- Pressurization can be performed, for example, by placing the mixture in a closed and agitable pressure-resistant container and then introducing an inert gas into the container.
- the inert gas include nitrogen gas and the like.
- the container include a pressure resistant autoclave equipped with a stirrer.
- the copolymer (A) it is preferable to heat as needed at the time of the pressurization. For example, it is preferable to heat the copolymer (A) to a temperature equal to or higher than the temperature at which the copolymer (A) softens in an aqueous medium. More specifically, for example, heating to about 80 to 150 ° C. is preferable, and heating to about 90 to 140 ° C. is more preferable.
- the copolymer (A) is an ethylene / (meth) acrylic acid copolymer, it is particularly desirable to heat the copolymer (A) to the relevant temperature (particularly about 90 to 110 ° C.) for aging.
- the concentration of the copolymer (A) contained in the obtained mixture is more than 50% by mass, it is necessary to carry out the dilution.
- the concentration of the copolymer (A) contained in the obtained mixture is more than 10% by mass and 50% by mass or less, the dilution is not always necessary, but it is preferable to perform the dilution.
- the copolymer (A) is adjusted to contain 10 to 50% by mass.
- the aqueous dispersion composition in which the copolymer (A) is stably dispersed, and when used as a coating agent, has not only water resistance but also blocking resistance and dissociation resistance. It is also possible to preferably obtain an excellent aqueous dispersion composition.
- a surfactant may be used as long as the effect of the composition of the present disclosure is not impaired, in order to particularly assist the dispersion.
- An aqueous dispersion composition containing the polymer (A) in a stable dispersion can be provided.
- the amount of heat of crystallization is a straight line connecting the point where the DSC curve separates from the baseline on the high temperature side and the point where the DSC curve returns to the baseline on the low temperature side when the temperature drops from 200 ° C to 0 ° C, and the DSC curve. It was calculated from the area of the enclosed part. An example of a schematic diagram of the calculation is shown in FIG.
- the melting point was set to the temperature of the peak top confirmed on the highest temperature side among the endothermic peaks confirmed when the temperature was raised from 0 ° C to 200 ° C.
- the average particle size was measured by a dynamic light scattering particle size distribution measuring method.
- the aqueous dispersion composition was measured with a dynamic light scattering type particle size distribution measuring device.
- a Zetasizer Nano ZS manufactured by Malven Co., Ltd. was used as the measuring device.
- the above device measures the diffusion of particles moving due to Brownian motion, and the measurement results are obtained from the diffusion coefficient by the Cumulant method from the autocorrelation function obtained by the photon correlation method using Stokes-Einstein's equation. Is calculated and measured as an average particle diameter Z-Average (fluid dynamic diameter) X nm.
- aqueous dispersion composition of the copolymer to be measured is added thereto, and the mixture is dispersed while stirring with a spatula, and dynamic light is applied. It was measured with a scattering type particle size distribution measuring device.
- ⁇ Viscosity measurement method The viscosity of the composition was measured using a BH type rotational viscometer. Specifically, the measurement was performed by reading the viscosity value 1 minute after the start of rotation of the rotor at 25 ° C., assuming that the rotation speed of the spindle rotor was 60 rotations per minute.
- the rotor can be appropriately set according to the viscosity, and as a guide, when the rotor is less than 2000 mPa ⁇ s, the rotor No. 3. If it is 2000 mPa ⁇ s or more and less than 5000 mPa ⁇ s, the rotor No.
- the rotor No. If it is 45,000 mPa ⁇ s or more and less than 15,000 mPa ⁇ s, the rotor No. In the case of 5, 15,000 mPa ⁇ s or more and less than 40,000 mPa ⁇ s, the rotor No. In the case of 6, 40,000 mPa ⁇ s or more, the rotor No. 7.
- the aqueous dispersion composition was immersed in a constant temperature aqueous layer heated to 25 ° C., and the viscosity of the aqueous dispersion was measured at 25 ° C.
- Brookfield DV-II + was used, and the rotor No. The viscosity was measured at a rotation speed of 3,60 rpm.
- the solid content (mass%) was calculated by the following formula.
- the aqueous dispersion composition was coated on high-quality paper (Nippon Paper Group npi high-quality paper) having a paper basis weight of 209 g / m 2 using a bar coater so that the coating film thickness was 5 ⁇ m. Then, it was dried in a hot air dryer at 100 ° C. for 5 minutes. The water resistance, blocking resistance, and recyclability of coated paper left indoors for 24 hours or more after drying were evaluated.
- ⁇ Water resistance evaluation method> As an index of water resistance of coated paper, water absorption using a water absorption tester (trade name: Garley type water absorption tester, Yasuda Seiki Seisakusho) by the Cobb method according to JIS P 8140 (1998). The degree was measured. The contact time between the coated paper and water was set to 5 minutes.
- a water absorption tester trade name: Garley type water absorption tester, Yasuda Seiki Seisakusho
- thermocompression bonding test pieces left indoors for 24 hours or more after thermocompression bonding were peeled by hand, and the blocking resistance was evaluated from the peeled state.
- evaluation criteria ⁇ : Easy interfacial peeling by hand
- ⁇ Dissociation evaluation> The prepared coated paper was evaluated for dissociation according to the following method. 5 g of coated paper was put into 500 g of pure water, and the mixture was stirred at 3000 rpm for 30 minutes using a disper. After stirring, the appearance of the coated paper was visually confirmed to evaluate the disintegration property. (Evaluation criteria) Good ( ⁇ ): Paper is finely dispersed in water Defective ( ⁇ ): The shape of coated paper is confirmed in water
- the ethylene / ⁇ , ⁇ -unsaturated carboxylic acid copolymer shown in Table 1 was used as the olefin / ⁇ , ⁇ -unsaturated carboxylic acid copolymer.
- Example 1 84 g of EMAA-1, 9.6 g of 28% ammonia water as a neutralizing agent, and 107.3 g of water are placed in a pressure-resistant container with a stirrer having a capacity of 1000 mL, and after sealing, nitrogen gas is introduced and a pressure gauge is installed in the pressure-resistant container. The pressure was increased to 0.6 MPa. Then, the temperature was raised to 95 ° C. while stirring at 500 rpm, and the inside of the container was kept at 95 ° C. and stirred for 4 hours. Then, the mixture was cooled to 90 ° C.
- aqueous dispersion composition had a solid content of 21.0% by mass, a particle size of 202 nm, and a viscosity of 684 mPa ⁇ s.
- a coated paper was prepared by applying the obtained aqueous dispersion to high-quality paper, and the water resistance, blocking resistance, and disintegration resistance were evaluated. The obtained results are shown in Tables 2 and 3.
- Example 2 72 g of EMAA-1, 11.9 g of 28% ammonia water as a neutralizing agent, and 121.3 g of water were placed in a pressure-resistant container with a stirrer having a capacity of 1000 mL and sealed. Then, the temperature was raised to 95 ° C. while stirring at 500 rpm, and the inside of the container was kept at 95 ° C. and stirred for 4 hours. Then, the mixture was cooled to 90 ° C. with stirring at 500 rpm, leaked the remaining pressure inside the kettle and returned to normal pressure, 154.8 g of water was added from the side tube of the container, and the mixture was cooled to 50 ° C.
- the contents were filtered through an 80 mesh made of polyethylene to obtain an aqueous dispersion.
- the obtained aqueous dispersion composition had a solid content of 19.9% by mass, a particle size of 132 nm, and a viscosity of 886 mPa ⁇ s.
- Example 3 82 g of EMAA-2, 17.4 g of 28% ammonia water as a neutralizing agent, and 104.2 g of water are placed in a pressure-resistant container with a stirrer having a capacity of 1000 mL, and after sealing, nitrogen gas is introduced and a pressure gauge is installed in the pressure-resistant container. The pressure was increased to 0.5 MPa. Then, the temperature was raised to 95 ° C. while stirring at 500 rpm, and the inside of the container was kept at 95 ° C. and stirred for 4 hours. Then, the mixture was cooled to 90 ° C.
- aqueous dispersion composition had a solid content of 20.0% by mass, a particle size of 193 nm, and a viscosity of 285 mPa ⁇ s.
- a coated paper was prepared by applying the obtained aqueous dispersion to high-quality paper, and the water resistance, blocking resistance, and disintegration resistance were evaluated. The obtained results are shown in Tables 2 and 3.
- Example 4 92 g of EMAA-3, 19.5 g of 28% ammonia water as a neutralizing agent, and 89.6 g of water are placed in a pressure-resistant container with a stirrer having a capacity of 1000 mL, and after sealing, nitrogen gas is introduced and a pressure gauge is installed in the pressure-resistant container. The pressure was increased to 0.5 MPa. Then, the temperature was raised to 95 ° C. while stirring at 500 rpm, and the inside of the container was kept at 95 ° C. and stirred for 4 hours. Then, the mixture was cooled to 90 ° C.
- aqueous dispersion composition had a solid content of 20.0% by mass, a particle size of 123 nm, and a viscosity of 31 mPa ⁇ s.
- a coated paper was prepared by applying the obtained aqueous dispersion to high-quality paper, and the water resistance, blocking resistance, and disintegration resistance were evaluated. The obtained results are shown in Tables 2 and 3.
- the solid content (% by mass) in these examples can be said to be the concentration of the ethylene / ⁇ and ⁇ -unsaturated carboxylic acid copolymer in the aqueous dispersion composition.
- the obtained aqueous dispersion composition had a solid content of 25.0% by mass, a particle size of 72 nm, and a viscosity of 573 mPa ⁇ s.
- a coated paper was prepared by applying the obtained aqueous dispersion to high-quality paper, and the water resistance, blocking resistance, and disintegration resistance were evaluated. The obtained results are shown in Tables 2 and 3.
- the obtained aqueous dispersion composition had a solid content of 25.0% by mass, a particle size of 75 nm, and a viscosity of 600 mPa ⁇ s.
- a coated paper was prepared by applying the obtained aqueous dispersion to high-quality paper, and the water resistance, blocking resistance, and disintegration resistance were evaluated. The obtained results are shown in Tables 2 and 3.
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Abstract
Description
項1.
α,β-不飽和カルボン酸又はそのエステルを構成単位に含む共重合体の水性分散組成物であって、アンモニアを含み、
当該共重合体の結晶化熱量が-30J/g以下であり、
当該共重合体が10~50質量%含有される、
組成物。
項2.
当該共重合体の平均粒子径が0.01~1μmである、項1に記載の組成物。
項3.
前記共重合体の結晶化熱量が-30~-55J/gである、項1又は2に記載の組成物。
項4.
コーティング用組成物である、項1~3のいずれかに記載の組成物。
項5.
紙坪量200~220g/m2の上質紙に塗工膜厚が5μmとなるように塗工し、100℃の熱風にて5分間乾燥させ、乾燥から24時間経過後に、コッブ(Cobb)法により当該塗工紙と水との接触時間を5分間として測定した吸水度が、10g/m2以下となる、項1~4のいずれかに記載の組成物。
項6.
α,β-不飽和カルボン酸が、アクリル酸、メタクリル酸、クロトン酸、マレイン酸、フマル酸、及びイタコン酸からなる群より選択される少なくとも1種であり、
α,β-不飽和カルボン酸のエステルが、α,β-不飽和カルボン酸の炭素数1~10のアルキルエステルである、項1~5のいずれかに記載の組成物。
項7.
α,β-不飽和カルボン酸又はそのエステルを構成単位に含む共重合体が、
さらに、エチレン、プロピレン、ブテン、イソブテン、ブタジエン、イソプレン、及びスチレンからなる少なくとも1種を構成単位に含む共重合体である、
項1~6のいずれかに記載の組成物。
項8.
α,β-不飽和カルボン酸又はそのエステルを構成単位に含む共重合体が、エチレン/α、β-不飽和カルボン酸共重合体である、項1~7のいずれかに記載の組成物。
項9.
エチレン/α、β-不飽和カルボン酸共重合体が、エチレン/(メタ)アクリル酸共重合体である、項8に記載の組成物。
項10.
紙基剤と、当該紙基剤上の皮膜とを備えた積層体であって、
当該皮膜が、項1~9のいずれかに記載の組成物を用いて形成されたものである、
積層体。
項11a.
(1)少なくとも、結晶化熱量が-30J/g以下の共重合体であってα,β-不飽和カルボン酸又はそのエステルを構成単位に含む共重合体、アンモニア、及び水を、
当該共重合体の濃度が30~60質量%となり、
アンモニアは、当該共重合体が有するカルボキシル基量に対して、70モル%以上となるよう、
混合すること、
を含む、
α,β-不飽和カルボン酸又はそのエステルを構成単位に含む共重合体の水性分散組成物の製造方法。
項11b.
さらに
(2)工程(1)で得られた混合物を0.1~2MPaで加圧すること、
を含む、
項11aに記載の水性分散組成物の製造方法。
項12.
さらに、
(3)加圧後さらに水を加えて、当該共重合体濃度を10~50質量%に調整することを含む、
項11bに記載の水性分散組成物の製造方法。
V1:滴定量(ml)
V0:ブランク滴定量(ml)
N:KOH濃度=0.1mol/l=0.1mmol/ml
E:不飽和カルボン酸分子量 Xg/mmol
(例として、アクリル酸:X=0.07206、 メタクリル酸:0.08609) W:試料重量(g)
示差走査熱量計装置DSC7020型(エスアイアイ・ナノテクノロジー(株)製)を用いて、アルミニウム製測定容器に測定用試料を約10mg充てん・密閉した後、窒素ガス流量40mL/minのもと速度10℃/minで0℃から200℃まで昇温し、その後200℃から0℃まで速度10℃/minで降温した時のDSC曲線を得た。
平均粒子径は、動的光散乱式粒度分布測定法により測定した。具体的には、水性分散組成物を動的光散乱式粒度分布測定装置にて測定した。当該測定装置としては、Malvean社製 ゼータサイザーナノ ZSを用いた。なお、上記装置はブラウン運動により移動している粒子の拡散を測定し、その測定結果をストークス・アインシュタインの式を用いて、光子相関法で求めた自己相関関数よりキュムラント法で拡散係数から粒子径を算出し、平均粒子径 Z-Average(流体力学的径)Xnmとして測定する。具体的には、100mlのビーカーに、蒸留水50mlを入れ、これに測定対象とする共重合体の水性分散組成物0.02gを添加して、スパチュラにて撹拌しながら分散させ、動的光散乱式粒度分布測定装置にて測定した。
組成物の粘度は、BH型回転粘度計を用いて測定した。具体的には、スピンドルローターの回転速度を毎分60回転として、25℃において、ローターの回転を開始してから1分後の粘度の値を読み取ることで測定した。なお、ローターは粘度に応じて適宜設定でき、目安として、2000mPa・s未満の場合はローターNo.3、2000mPa・s以上5000mPa・s未満の場合はローターNo.4、5000mPa・s以上15000mPa・s未満の場合はローターNo.5、15000mPa・s以上40000mPa・s未満の場合はローターNo.6、40000mPa・s以上の場合はローターNo.7である。
水性分散組成物を1g秤量し、熱風乾燥機(ADVANTEC製DRE320DR)で、130℃にて3時間乾燥させ、乾燥固形物を取得した。固形分(質量%)は下記の式で算出した。
水性分散組成物を紙坪量209g/m2の上質紙(日本製紙グループ npi上質)にバーコーターを用いて塗工膜厚が5μmとなるように塗工した。その後、100℃の熱風乾燥機にて5分間乾燥させた。乾燥から24時間以上室内にて放置した塗工紙に対して、耐水性、耐ブロッキング性、リサイクル性について評価を行った。
塗工紙の耐水性の指標として、JIS P 8140(1998年)に準じてコッブ(Cobb)法で、吸水度試験器(商品名:ガーレー式吸水度試験機、安田精機製作所)を用いて吸水度を測定した。尚、塗工紙と水の接触時間は5分間とした。
作製した塗工紙を2枚用意し、それぞれの塗工面同士を重ね合わせ、圧着温度70℃、圧力0.5MPa、圧着時間2時間で熱圧着を行った。熱圧着から24時間以上室内にて放置した熱圧着試験片について、手で剥離を行い、その剥離状態から耐ブロッキング性を評価した。
(評価基準)
○:手で簡単に界面剥離
△:強く接着するが界面剥離
×:紙基材破壊
作製した塗工紙を下記方法に従い、離解性評価を行った。
塗工紙5gを純水500gに投入し、ディスパーを用いて3000rpmで30分間攪拌した。攪拌後、塗工紙の外観を目視で確認し、離解性を評価した。
(評価基準)
良好(○):水中に紙が細かく分散している
不良(×):水中に塗工紙の形状が確認される
1000mL容の攪拌機付き耐圧容器に、EMAA-1を84g、中和剤として28%アンモニア水9.6g、および水107.3gを仕込み密閉後、窒素ガスを導入し耐圧容器に備えつけてある圧力計で0.6MPaまで加圧した。その後、毎分500回転で攪拌しながら、95℃まで昇温し、容器内を95℃に保って4時間攪拌した。次いで、毎分500回転で攪拌しながら90℃まで冷却し、残存する釜内圧をリークし常圧に戻し、容器の側管より199.0gの水を添加し、50℃まで冷却した。内容物をポリエチレン製の80目網でろ過し、水性分散物を得た。得られた水性分散組成物は固形分21.0質量%、粒子径202nm、粘度684mPa・sであった。得られた水性分散物を上質紙に塗工することで塗工紙を作成し、耐水性、耐ブロッキング性、離解性の評価を行った。得られた結果は表2、表3に示した。
1000mL容の攪拌機付き耐圧容器に、EMAA-1を72g、中和剤として28%アンモニア水11.9g、および水121.3gを仕込み密閉した。その後、毎分500回転で攪拌しながら、95℃まで昇温し、容器内を95℃に保って4時間攪拌した。次いで、毎分500回転で攪拌しながら90℃まで冷却し、残存する釜内圧をリークし常圧に戻し、容器の側管より154.8gの水を添加し、50℃まで冷却した。内容物をポリエチレン製の80目網でろ過し、水性分散物を得た。得られた水性分散組成物は固形分19.9質量%、粒子径132nm、粘度886mPa・sであった。
1000mL容の攪拌機付き耐圧容器に、EMAA-2を82g、中和剤として28%アンモニア水17.4g、および水104.2gを仕込み密閉後、窒素ガスを導入し耐圧容器に備えつけてある圧力計で0.5MPaまで加圧した。その後、毎分500回転で攪拌しながら、95℃まで昇温し、容器内を95℃に保って4時間攪拌した。次いで、毎分500回転で攪拌しながら90℃まで冷却し、残存する釜内圧をリークし常圧に戻し、容器の側管より206.4gの水を添加し、50℃まで冷却した。内容物をポリエチレン製の80目網でろ過し、水性分散物を得た。得られた水性分散組成物は固形分20.0質量%、粒子径193nm、粘度285mPa・sであった。得られた水性分散物を上質紙に塗工することで塗工紙を作成し、耐水性、耐ブロッキング性、離解性の評価を行った。得られた結果は表2、表3に示した。
1000mL容の攪拌機付き耐圧容器に、EMAA-3を92g、中和剤として28%アンモニア水19.5g、および水89.6gを仕込み密閉後、窒素ガスを導入し耐圧容器に備えつけてある圧力計で0.5MPaまで加圧した。その後、毎分500回転で攪拌しながら、95℃まで昇温し、容器内を95℃に保って4時間攪拌した。次いで、毎分500回転で攪拌しながら90℃まで冷却し、残存する釜内圧をリークし常圧に戻し、容器の側管より258.9gの水を添加し、50℃まで冷却した。内容物をポリエチレン製の80目網でろ過し、水性分散物を得た。得られた水性分散組成物は固形分20.0質量%、粒子径123nm、粘度31mPa・sであった。得られた水性分散物を上質紙に塗工することで塗工紙を作成し、耐水性、耐ブロッキング性、離解性の評価を行った。得られた結果は表2、表3に示した。
1000mL容の攪拌機付き耐圧容器に、EAA-1を98g、中和剤として28%アンモニア水11.4g、および水290.6gを仕込み密閉後、毎分500回転で攪拌しながら、95℃まで昇温し、容器内を95℃に保って4時間攪拌し、50℃まで冷却した。内容物をポリエチレン製の80目網でろ過し、水性分散物を得た。得られた水性分散組成物は、固形分24.5質量%、粒子径100nm、粘度140mPa・sであった。得られた水性分散物を上質紙に塗工することで塗工紙を作成し、耐水性、耐ブロッキング性、離解性の評価を行った。得られた結果は表2、表3に示した。
1000mL容の攪拌機付き耐圧容器に、EMAA-2を98g、中和剤として10%水酸化ナトリウム水溶液41g、および水359gを仕込み密閉後、毎分500回転で攪拌しながら、95℃まで昇温し、容器内を95℃に保って4時間攪拌し、50℃まで冷却した。内容物をポリエチレン製の80目網でろ過し、水性分散物を得た。得られた水性分散組成物は、固形分25.0質量%、粒子径72nm、粘度573mPa・sであった。得られた水性分散物を上質紙に塗工することで塗工紙を作成し、耐水性、耐ブロッキング性、離解性の評価を行った。得られた結果は表2、表3に示した。
1000mL容の攪拌機付き耐圧容器に、EMAA-3を98g、中和剤として10%水酸化ナトリウム水溶液41g、および水359gを仕込み密閉後、毎分500回転で攪拌しながら、95℃まで昇温し、容器内を95℃に保って4時間攪拌し、50℃まで冷却した。内容物をポリエチレン製の80目網でろ過し、水性分散物を得た。得られた水性分散組成物は、固形分25.0質量%、粒子径75nm、粘度600mPa・sであった。得られた水性分散物を上質紙に塗工することで塗工紙を作成し、耐水性、耐ブロッキング性、離解性の評価を行った。得られた結果は表2、表3に示した。
Claims (12)
- α,β-不飽和カルボン酸又はそのエステルを構成単位に含む共重合体の水性分散組成物であって、アンモニアを含み、
当該共重合体の結晶化熱量が-30J/g以下であり、
当該共重合体が10~50質量%含有される、
組成物。 - 当該共重合体の平均粒子径が0.01~1μmである、請求項1に記載の組成物。
- 前記共重合体の結晶化熱量が-30~-55J/gである、請求項1又は2に記載の組成物。
- コーティング用組成物である、請求項1~3のいずれかに記載の組成物。
- 紙坪量200~220g/m2の上質紙に塗工膜厚が5μmとなるように塗工し、100℃の熱風にて5分間乾燥させ、乾燥から24時間経過後に、コッブ(Cobb)法により当該塗工紙と水との接触時間を5分間として測定した吸水度が、10g/m2以下となる、請求項1~4のいずれかに記載の組成物。
- α,β-不飽和カルボン酸が、アクリル酸、メタクリル酸、クロトン酸、マレイン酸、フマル酸、及びイタコン酸からなる群より選択される少なくとも1種であり、
α,β-不飽和カルボン酸のエステルが、α,β-不飽和カルボン酸の炭素数1~10のアルキルエステルである、請求項1~5のいずれかに記載の組成物。 - α,β-不飽和カルボン酸又はそのエステルを構成単位に含む共重合体が、
さらに、エチレン、プロピレン、ブテン、イソブテン、ブタジエン、イソプレン、及びスチレンからなる少なくとも1種を構成単位に含む共重合体である、
請求項1~6のいずれかに記載の組成物。 - α,β-不飽和カルボン酸又はそのエステルを構成単位に含む共重合体が、エチレン/α、β-不飽和カルボン酸共重合体である、請求項1~7のいずれかに記載の組成物。
- エチレン/α、β-不飽和カルボン酸共重合体が、エチレン/(メタ)アクリル酸共重合体である、請求項8に記載の組成物。
- 紙基剤と、当該紙基剤上の皮膜とを備えた積層体であって、
当該皮膜が、請求項1~9のいずれかに記載の組成物を用いて形成されたものである、積層体。 - (1)少なくとも、結晶化熱量が-30J/g以下の共重合体であってα,β-不飽和カルボン酸又はそのエステルを構成単位に含む共重合体、アンモニア、及び水を、
当該共重合体の濃度が30~60質量%となり、
アンモニアは、当該共重合体が有するカルボキシル基量に対して、70モル%以上となるよう、
混合すること、並びに、
(2)得られた混合物を0.1~2MPaで加圧すること、
を含む、
α,β-不飽和カルボン酸又はそのエステルを構成単位に含む共重合体の水性分散組成物の製造方法。 - さらに、
(3)加圧後さらに水を加えて、当該共重合体濃度を10~50質量%に調整することを含む、
請求項11に記載の水性分散組成物の製造方法。
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