WO2017073355A1 - ポリアクリルアミド樹脂、製紙添加剤および紙 - Google Patents
ポリアクリルアミド樹脂、製紙添加剤および紙 Download PDFInfo
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- WO2017073355A1 WO2017073355A1 PCT/JP2016/080481 JP2016080481W WO2017073355A1 WO 2017073355 A1 WO2017073355 A1 WO 2017073355A1 JP 2016080481 W JP2016080481 W JP 2016080481W WO 2017073355 A1 WO2017073355 A1 WO 2017073355A1
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- polyacrylamide resin
- paper
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- 0 CC(C)CC(*)(*(*)CN1**)C1=O Chemical compound CC(C)CC(*)(*(*)CN1**)C1=O 0.000 description 1
Classifications
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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
- C08F220/52—Amides or imides
- C08F220/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F220/56—Acrylamide; Methacrylamide
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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
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
-
- 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
- C08F2800/00—Copolymer characterised by the proportions of the comonomers expressed
- C08F2800/10—Copolymer characterised by the proportions of the comonomers expressed as molar percentages
Definitions
- the present invention relates to a polyacrylamide resin, a papermaking additive, and paper. More specifically, the present invention relates to a polyacrylamide resin, a papermaking additive containing the polyacrylamide resin, and paper containing the polyacrylamide resin.
- a yield improver and a drainage improver for improving the workability and work efficiency by improving the yield and drainage of the raw material pulp and / or filler
- Various paper making additives are known, such as paper making additives for improving the strength of paper products.
- such a papermaking additive can be obtained, for example, by adding methyldiallylamine and carboxylic acid (fumaric acid) to water, heating and dissolving, and then adding a polymerization initiator and polymerizing.
- Amphoteric polymer compounds have been proposed, and the use of such amphoteric polymer compounds as paper additives has been proposed (see Patent Document 1 (Synthesis Example 4)).
- the paper containing the paper additive described in Patent Document 1 may not have sufficient strength depending on the application. Further, in the papermaking field, further improvement in drainage is required in order to improve paper production efficiency.
- the object of the present invention is to improve the strength of paper, especially the internal bond strength, and to improve the drainage, a polyacrylamide resin, a papermaking additive containing the polyacrylamide resin, and It is to provide a paper containing a polyacrylamide resin.
- the present invention [1] includes a polyacrylamide resin having at least one first unit represented by the following formulas (1) to (4) and a second unit represented by the following formula (5). .
- R1 represents a hydrogen atom, a methyl group, an ethyl group or a benzyl group
- R2 and R3 each independently represent a hydrogen atom, a methyl group, an ethyl group or a benzyl group
- X represents an anion.
- the present invention [2] includes the polyacrylamide resin according to the above [1], which has the first unit represented by the above formula (3) or the above formula (4), and X represents Cl 2 —. It is out.
- the present invention [3] includes a papermaking additive containing the polyacrylamide resin described in the above [1] or [2].
- the present invention [4] includes paper containing the polyacrylamide resin described in the above [1] or [2].
- the strength of the paper in particular, the internal bond strength of the paper can be improved. And drainage can be improved.
- the paper of the present invention contains the polyacrylamide resin of the present invention, it is obtained with high productivity and is excellent in strength.
- the polyacrylamide resin of the present invention has at least one first unit represented by the following formulas (1) to (4) and a second unit represented by the following formula (5).
- the polyacrylamide resin includes at least one first unit selected from the group consisting of the following formula (1), the following formula (2), the following formula (3), and the following formula (4), and the following formula: And a second unit indicated by (5).
- the first unit and the second unit are divalent structural units constituting the polyacrylamide resin.
- R1 represents a hydrogen atom, a methyl group, an ethyl group or a benzyl group
- R2 and R3 each independently represent a hydrogen atom, a methyl group, an ethyl group or a benzyl group
- X represents an anion.
- R4 represents a hydrogen atom or a methyl group
- R5 represents a hydrogen atom, an alkali metal ion, or an ammonium ion.
- R1 represents a hydrogen atom, a methyl group, an ethyl group or a benzyl group.
- R1 is preferably a hydrogen atom or a methyl group, and more preferably a methyl group.
- those R1s may be the same or different from each other.
- R2 and R3 each independently represent a hydrogen atom, a methyl group, an ethyl group or a benzyl group.
- R2 and R3 are preferably a hydrogen atom or a methyl group, and more preferably a methyl group.
- X represents an anion.
- the anion is a counter anion with respect to the ammonium cation of the above formulas (3) to (4), for example, a halogen anion such as chlorine anion (Cl ⁇ ), bromine anion (Br ⁇ ), iodine anion (I ⁇ ), Examples thereof include organic anions such as methyl sulfate anion (CH 3 O 4 S ⁇ ).
- X is preferably a halogen anion, more preferably a chlorine anion (Cl ⁇ ), from the viewpoint of improving the internal bond strength of paper and improving the drainage.
- R2, R3 and X may be the same as or different from each other. Also good.
- R4 represents a hydrogen atom or a methyl group.
- R4 is preferably a hydrogen atom.
- R5 represents a hydrogen atom, an alkali metal ion, or an ammonium ion (NH 4 + ).
- alkali metal ion examples include lithium ion (Li + ), sodium ion (Na + ), potassium ion (K + ), rubidium ion (Rb + ), cesium ion (Cs + ), and the like.
- an alkali metal ion Preferably, sodium ion (Na ⁇ +> ) and potassium ion (K ⁇ +> ) are mentioned.
- those R4 and R5 may mutually be the same, and may each differ.
- Such a polyacrylamide resin can be obtained, for example, as a polymer of a polymerization component including a first polymerizable compound for forming the first unit and a second polymerizable compound for forming the second unit. .
- the first polymerizable compound is a monomer for forming the first unit represented by the above formulas (1) to (4), and includes, for example, the first unit represented by the above formulas (1) to (2).
- Examples thereof include diallylamine compounds for forming, diallyl ammonium compounds for forming the first units represented by the above formulas (3) to (4), and the like.
- a diallylamine compound is a compound having a secondary or tertiary amino group and two allyl groups (—CH 2 CH ⁇ CH 2 ) directly bonded to the nitrogen atom of the amino group, for example, diallylamine Secondary diallylamine monomers (monomers having secondary amino groups) such as, for example, tertiary diallylamine monomers (monomers having tertiary amino groups) such as N-methyldiallylamine, N-ethyldiallylamine, N-benzyldiallylamine, etc. ). These diallylamine compounds can be used alone or in combination of two or more.
- the diallylamine compound is preferably a tertiary diallylamine monomer.
- the diallylammonium compound is a compound having an ammonium group and two allyl groups (—CH 2 CH ⁇ CH 2 ) directly bonded to the nitrogen atom of the ammonium group.
- a tertiary diallylamine monomer is converted into a quaternary. Quaternized compounds (quaternized salts).
- Examples of the quaternized product of the tertiary diallylamine monomer include diallyldimethylammonium chloride, diallyldimethylammonium bromide, diallyldimethylammonium iodide, diallyldimethylammonium sulfate, diallyldiethylammonium chloride, diallyldiethylammonium bromide, diallyldiethylammonium iodide.
- diallyldiethylammonium sulfate diallylmethylethylammonium chloride, diallylmethylethylammonium bromide, diallylmethylethylammonium iodide, diallylmethylethylammonium ammonium sulfate, diallylmethylbenzylammonium chloride, diallylmethylbenzylammonium bromide, diallylmethylbenzyl Numonium iodide, diallylmethylbenzylammonium chloride, diallylethylbenzylammonium chloride, diallylethylbenzylammonium bromide, diallylethylbenzylammonium iodide, diallylethylbenzylammonium sulfate, diallyldibenzylammonium chloride, diallyldibenzylammonium bromide, diallyl Examples include dibenzylammonium iod
- Examples of the first polymerizable compound include inorganic acid salts such as the above-mentioned diallylamine compound hydrochloride, sulfate, nitrate, and phosphate, and organic acid salts such as the above-mentioned diallylamine compound acetate. Can also be used.
- These first polymerizable compounds can be used alone or in combination of two or more.
- the first polymerizable compound is preferably a diallylammonium compound, and more preferably diallyldimethylammonium chloride.
- the content ratio of the first polymerizable compound is, for example, 0.01 mol% or more, preferably 0.1 mol% or more, for example, 30 mol% or less, preferably, relative to the total moles of the polymerization components. It is 15 mol% or less.
- the second polymerizable compound is a monomer for forming the second unit represented by the above formula (5), and examples thereof include a glyoxylic acid-modified product of (meth) acrylamide.
- (Meth) acrylamide includes acrylamide and methacrylamide.
- (meth) acryl is defined as acrylic and / or methacryl (the same applies hereinafter).
- modified glyoxylic acid of (meth) acrylamide examples include 2-acrylamide-N-glycolic acid, 2-methacrylamide-N-glycolic acid, and salts thereof.
- salt examples include sodium salt, potassium salt, ammonium salt and the like.
- the glyoxylic acid modified form of (meth) acrylamide can be used alone or in combination of two or more.
- These second polymerizable compounds can be used alone or in combination of two or more.
- the second polymerizable compound is preferably a glyoxylic acid modified form of (meth) acrylamide, more preferably 2-acrylamide-N-glycolic acid.
- the content ratio of the second polymerizable compound is, for example, 0 mol% or more, preferably 0.1 mol% or more, for example, 30 mol% or less, preferably 15 mol, based on the total mol of the polymerization components. % Or less.
- the content ratio of the second polymerizable compound may be 0 mol% with respect to the total moles of the polymerization components as described above. That is, the second polymerizable compound may not be included in the polymerization component.
- the polymerization component is polymerized, or after polymerization of the polymerization component, it is acid-modified with glyoxylic acid and / or a salt thereof, and the above formula (5) Form the second unit shown.
- the polymerization component can contain other polymerizable monomers as optional components in addition to the first polymerizable compound and the second polymerizable compound.
- Examples of other polymerizable monomers include (meth) acrylamide, anionic polymerizable monomers (excluding the second polymerizable compound (hereinafter the same)), nonionic copolymerizable monomers, tertiary amino monomers (thirds). Quaternary ammonium monomers (excluding quaternary products of tertiary diallylamine monomers (hereinafter the same)), crosslinkable monomers, (meth) allyl sulfonates, etc. Can be mentioned.
- (Meth) acrylamide is (meth) acrylamide not modified with glyoxylic acid and can be used alone or in combination of two. That is, as the other polymerizable monomer, only one of acrylamide and methacrylamide may be used, or they may be used in combination. Preferably, acrylamide is used alone.
- the content ratio is, for example, 50 mol% or more, preferably 60 mol% or more, for example, 99 mol% or less, preferably, with respect to the total moles of the polymerization components. 97 mol% or less.
- anionic polymerizable monomer examples include organic acid monomers such as ⁇ , ⁇ -unsaturated carboxylic acid and sulfonic acid monomer having a vinyl group.
- Examples of the ⁇ , ⁇ -unsaturated carboxylic acid include ⁇ , ⁇ -unsaturated monocarboxylic acid monomers such as acrylic acid, methacrylic acid, and crotonic acid, such as maleic acid, fumaric acid, itaconic acid, and citraconic acid. and ⁇ , ⁇ -unsaturated dicarboxylic acid monomers.
- sulfonic acid monomer having a vinyl group examples include vinyl sulfonic acid, styrene sulfonic acid, 2-acrylamido-2-methylpropane sulfonic acid, and the like.
- anionic copolymerizable monomer a salt such as sodium salt, potassium salt or ammonium salt of the above-mentioned organic acid monomer can be used.
- anionic polymerizable monomers can be used alone or in combination of two or more.
- the anionic polymerizable monomer is preferably an organic acid monomer, more preferably an ⁇ , ⁇ -unsaturated carboxylic acid, still more preferably itaconic acid or acrylic acid, and particularly preferably itaconic acid.
- the content ratio thereof is, for example, more than 0 mol%, preferably 0.5 mol% or more, for example, 20 mol with respect to the total mol of the polymerization components. % Or less, preferably 10 mol% or less.
- Nonionic polymerizable monomers include, for example, alkyl (meth) acrylate, hydroxyalkyl (meth) acrylate, diacetone acrylamide, styrene, ⁇ -methyl styrene, polyalkylene glycol (meth) acrylate, glycerol mono (meth) acrylate, vinyl Examples include pyrrolidone, vinyl oxazoline, vinyl acetate, acryloyl morpholine, acrylonitrile.
- nonionic polymerizable monomers can be used alone or in combination of two or more.
- nonionic polymerizable monomer examples include alkyl (meth) acrylate and hydroxyalkyl (meth) acrylate.
- alkyl (meth) acrylate examples include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, sec-butyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, neopentyl (meth) acrylate, isoamyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, octyl (meth) ) Acrylate, isooctyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate
- the content thereof is, for example, more than 0 mol%, preferably 1 mol% or more, for example, 20 mol%, with respect to the total mol of the polymerization components.
- it is preferably 10 mol% or less.
- a tertiary amino monomer (excluding a tertiary diallylamine monomer) is a polymerizable monomer (non-quaternized product) having a tertiary amino group, and has, for example, a tertiary amino group (meth).
- examples thereof include acrylic acid ester derivatives and (meth) acrylamide derivatives having a tertiary amino group.
- examples of the (meth) acrylic acid ester derivative having a tertiary amino group include dialkylaminoethyl (meth) acrylate (for example, dimethylaminoethyl (meth) acrylate), dialkylaminopropyl (meth) acrylate, and the like. .
- Examples of the (meth) acrylamide derivative having a tertiary amino group include dialkylaminoalkyl (meth) acrylamide (eg, dialkylaminopropyl (meth) acrylamide (eg, dimethylaminopropylacrylamide), (meth) acrylamide). -3-methylbutyldimethylamine).
- tertiary amino monomers can be used alone or in combination of two or more.
- the content thereof is, for example, more than 0 mol%, preferably 0.1 mol% or more, for example, 30 mol%, based on the total mol of the polymerization components.
- the mol% or less preferably 15 mol% or less.
- a quaternary ammonium monomer (excluding a quaternized product of a tertiary diallylamine monomer) is a cationic copolymerizable monomer having a quaternary ammonium group and having an ethylenic double bond. Examples thereof include quaternized products of the above tertiary amino monomers.
- Examples of the quaternized product of the tertiary amino monomer include, for example, the tertiary amino group of the tertiary amino monomer, methyl chloride (methyl chloride), methyl bromide, benzyl chloride (benzyl chloride), benzyl bromide, Quaternized products (quaternized salts) quaternized with dimethyl sulfate, epichlorohydrin and the like can be mentioned.
- quaternary ammonium monomers can be used alone or in combination of two or more.
- the content ratio thereof is, for example, more than 0 mol%, preferably 0.1 mol% or more, for example, 30 mol%, based on the total mol of the polymerization components.
- the mol% or less preferably 15 mol% or less.
- crosslinkable monomer examples include a crosslinkable monomer containing an amide group (for example, methylene bis (meth) acrylamide, ethylene bis (meth) acrylamide, allyl (meth) acrylamide, N monosubstituted acrylamide monomers (for example, N, N 'One dimethylacrylamide, diacetone acrylamide, isopropylacrylamide), triacryl formal, crosslinkable monomer containing imide group (eg diacryloylimide), nitrogen-free bifunctional crosslinker (eg divinylbenzene, ethylene Glycol di (meth) acrylate diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, allyl (meth) acrylate, etc.), nitrogen-free polyfunctional crosslinking agents (eg triac Le acid pentaerythritol, trimethylolpropane acrylate, tetraallyloxyethane) can be mentioned.
- an amide group
- crosslinkable monomers can be used alone or in combination of two or more.
- the content ratio thereof is, for example, more than 0 mol%, preferably 0.01 mol% or more, for example, 10 mol% or less, with respect to the total moles of the polymerization components. Preferably, it is 5 mol% or less.
- (Meth) allyl sulfonate is a copolymerizable monomer that also acts as a chain transfer agent, and (meth) allyl is defined as allyl and / or methallyl.
- (meth) allyl sulfonate examples include sodium allyl sulfonate, sodium methallyl sulfonate, potassium allyl sulfonate, and potassium methallyl sulfonate.
- the content ratio thereof is, for example, more than 0 mol%, preferably 0.2 mol% or more, based on the total mol of the polymerization component, for example, 5 mol% or less, preferably 3 mol% or less.
- polymerizable monomers are preferably (meth) acrylamide, anionic polymerizable monomers, and (meth) allyl sulfonate.
- the polymerization component preferably contains a first polymerizable compound, a second polymerizable compound, (meth) acrylamide, an anionic polymerizable monomer and (meth) allyl sulfonate, or It contains a first polymerizable compound, a second polymerizable compound, (meth) acrylamide and (meth) allyl sulfonate.
- the polymerization component consists of the first polymerizable compound, the second polymerizable compound, (meth) acrylamide, an anionic polymerizable monomer and (meth) allyl sulfonate, or the first polymerizable compound, It consists of a second polymerizable compound, (meth) acrylamide and (meth) allyl sulfonate.
- the polymerization component contains (meth) acrylamide, an anionic polymerizable monomer, and (meth) allyl sulfonate. That is, preferably, the polymerization component comprises a first polymerizable compound, a second polymerizable compound, (meth) acrylamide, an anionic polymerizable monomer, and (meth) allyl sulfonate.
- the polymerization component comprises a first polymerizable compound, a second polymerizable compound, (meth) acrylamide and (meth) allyl sulfonate.
- a polymerization component for example, a polymerization component, a polymerization initiator, and a solvent are charged into a predetermined reaction vessel and reacted.
- the polymerization components may be charged all at once, but may be dividedly added in a plurality of times. Further, the reaction can be allowed to proceed while part or all of the polymerization initiator is dropped into the reaction vessel.
- polymerization initiator examples include radical polymerization initiators, and specifically include peroxide compounds, sulfides, sulfines, sulfinic acids, and the like, and more preferably, peroxide compounds.
- the peroxide compound may be used as a redox polymerization initiator in combination with a reducing agent.
- Examples of the peroxide compound include organic peroxides and inorganic peroxides, and inorganic peroxides are preferable.
- organic peroxide examples include benzoyl peroxide, lauroyl peroxide, acetyl peroxide, capryel peroxide, 2,4-dichlorobenzoyl peroxide, isobutyl peroxide, acetylcyclohexylsulfonyl peroxide, and t-butyl peroxide.
- inorganic peroxides include persulfates such as sodium persulfate, potassium persulfate and ammonium persulfate, bromates such as hydrogen peroxide, potassium permanganate, sodium bromate and potassium bromate, and perboric acid.
- Perborates such as sodium, potassium perborate, ammonium perborate, percarbonates such as sodium percarbonate, potassium percarbonate, ammonium percarbonate, sodium perphosphate, potassium perphosphate, ammonium perphosphate, etc.
- Persulfate, and the like preferably persulfate, more preferably potassium persulfate and ammonium persulfate, and still more preferably ammonium persulfate.
- These polymerization initiators can be used alone or in combination of two or more.
- an azo compound can be used as the polymerization initiator.
- azo compound examples include 2,2'-azobisisobutyronitrile, 2,2'-azobis (2-methylpropionamidine), and salts thereof.
- the polymerization initiator is preferably an inorganic peroxide, more preferably a persulfate, and still more preferably ammonium persulfate.
- the viscosity of the polyacrylamide resin can be kept low, and papermaking chemicals with excellent handling properties. Can be provided.
- the blending ratio of the polymerization initiator is, for example, 0.01 parts by mass or more, preferably 0.05 parts by mass or more, for example, 10 parts by mass or less, preferably 100 parts by mass of the total amount of the polymerization components. 5 parts by mass or less.
- the solvent examples include water, for example, ketone solvents such as acetone and methyl ethyl ketone, and monohydric alcohol solvents such as methanol, ethanol, propanol, isopropanol, and butanol, such as ethylene glycol monoethyl ether and propylene glycol monomethyl ether.
- ketone solvents such as acetone and methyl ethyl ketone
- monohydric alcohol solvents such as methanol, ethanol, propanol, isopropanol, and butanol, such as ethylene glycol monoethyl ether and propylene glycol monomethyl ether.
- a solvent miscible with water such as an ester ether solvent such as propylene glycol monomethyl ether acetate, is preferable, and water is preferable.
- a chelating agent ethylenediaminetetraacetic acid etc.
- solvents can be used alone or in combination of two or more.
- the mixing ratio of the solvent is not particularly limited, and is appropriately set according to the purpose and use.
- a chain transfer agent (excluding (meth) allyl sulfonate) can be appropriately blended together with the above-described polymerization component, polymerization initiator and solvent.
- chain transfer agent examples include isopropyl alcohol, for example, mercaptos (for example, mercaptoethanol, thiourea, thioglycolic acid, mercaptopropionic acid, thiosalicylic acid, thiolactic acid, aminoethanethiol, thioglycerol, thiomalic acid, etc.) Is mentioned.
- mercaptos for example, mercaptoethanol, thiourea, thioglycolic acid, mercaptopropionic acid, thiosalicylic acid, thiolactic acid, aminoethanethiol, thioglycerol, thiomalic acid, etc.
- chain transfer agents can be used alone or in combination of two or more.
- the mixing ratio of these chain transfer agents is, for example, 0.05 mol% or more, preferably 0.1 mol% or more, for example, 10 mol% or less, preferably, relative to the total number of moles of the polymerization components. 5 mol% or less.
- the polymerization conditions in the production of the polyacrylamide resin vary depending on the type of polymerization component, polymerization initiator, solvent, etc., but the polymerization temperature is, for example, 30 ° C or higher, preferably 50 ° C or higher, for example, 100 ° C or lower, Preferably, it is 95 degrees C or less.
- the polymerization time is, for example, 0.5 hours or more, preferably 1 hour or more, for example, 24 hours or less, preferably 12 hours or less.
- the polymerization reaction is stopped by adding a known polymerization terminator (for example, sodium thiosulfate, sodium sulfite).
- the pH of the reaction solution during polymerization is, for example, 1 or more, preferably 2 or more, and for example, 6 or less, preferably 5 or less.
- the pH can be adjusted by adding a known acid such as hydrochloric acid, sulfuric acid or phosphoric acid.
- the first polymerizable compound forms at least one of the first units represented by the above formulas (1) to (4), and the second polymerizable compound becomes the above formula (5).
- the solution of a polyacrylamide resin is obtained.
- a polyacrylamide resin can be obtained without using the second polymerizable compound.
- the second polymerizable compound (glyoxylic acid modified form of (meth) acrylamide) May not be contained in the polymerization component.
- a polymerization component containing (meth) acrylamide ((meth) acrylamide not modified with glyoxylic acid) is polymerized in the same manner as described above, and glyoxylic acid and / or its Add salt and react.
- the polymerization component preferably contains (meth) acrylamide, an anionic polymerizable monomer, and (meth) allyl sulfonate. That is, preferably, the polymerization component is composed of a first polymerizable compound, (meth) acrylamide, an anionic polymerizable monomer, and (meth) allyl sulfonate.
- the polymerization component comprises a first polymerizable compound, (meth) acrylamide and (meth) allyl sulfonate.
- glyoxylic acid can be used as glyoxylic acid.
- glyoxylic acid salt include sodium salt, potassium salt, and ammonium salt of glyoxylic acid.
- the addition ratio of glyoxylic acid and / or a salt thereof is approximately the same as the content ratio of the second polymerizable compound when the second polymerizable compound is contained in the polymerization component.
- the addition ratio of glyoxylic acid and / or a salt thereof is, for example, more than 0 mol%, preferably 0.1 mol% or more, for example, 30 mol% with respect to the total mol of the polymerization components.
- the mol% or less preferably 15 mol% or less.
- (meth) acrylamide in the polymerization component can be modified with glyoxylic acid, and the second unit represented by the above formula (5) can be formed on the polyacrylamide resin.
- a polymerization component containing (meth) acrylamide ((meth) acrylamide not modified with glyoxylic acid) is polymerized without adding glyoxylic acid and / or a salt thereof, and then the resulting polymer is glyoxyl. An acid and / or a salt thereof can be added and reacted.
- the addition ratio of glyoxylic acid and / or a salt thereof is, for example, more than 0 mol%, preferably 0.1 mol% or more, for example, 30 mol%, based on the total mol of the polymerization components.
- the mol% or less preferably 15 mol% or less.
- the reaction temperature is, for example, 30 ° C. or higher, preferably 50 ° C. or higher, for example, 100 ° C. or lower, preferably 95 ° C. or lower.
- the reaction time is, for example, 0.2 hours or more, preferably 0.5 hours or more, for example, 5 hours or less, preferably 2 hours or less.
- the unit derived from (meth) acrylamide in the polymer can be modified with glyoxylic acid, and the second unit represented by the above formula (5) can be formed on the polyacrylamide resin.
- the first unit represented by the above formulas (1) to (4) and the second unit represented by the above formula (5) (second A polyacrylamide resin containing a structural unit derived from a polymerizable compound) can be obtained.
- the structural unit derived from (meth) acrylamide is a main structural unit in the above-described polymer, and is uniformly distributed in the polymer.
- a polymerization component containing (meth) acrylamide ((meth) acrylamide not modified with glyoxylic acid) is polymerized, and glyoxylic acid and / or a salt thereof is added to the polymerization component, (I.e., (meth) acrylamide as a polymerization component is modified with glyoxylic acid and / or a salt thereof during the polymerization reaction).
- the polymerization components are preferably added in portions. More specifically, first, a part of the polymerization component (for example, 10 to 30 mol% with respect to the total amount of the polymerization component) is put into a reaction vessel, and a polymerization initiator is added thereto for polymerization. Thereafter, the remainder of the polymerization component (for example, 70 to 90 mol% with respect to the total amount of the polymerization component) is charged and polymerized.
- a part of the polymerization component for example, 10 to 30 mol% with respect to the total amount of the polymerization component
- a polymerization initiator is added thereto for polymerization.
- the remainder of the polymerization component for example, 70 to 90 mol% with respect to the total amount of the polymerization component
- each monomer contained in the polymerization component may be contained in either a part or the remainder of the polymerization component.
- the first polymerizable compound is contained in a polymerization component (a part of the polymerization component) initially charged into the reaction vessel, and more preferably 50 to 100 mass with respect to the total amount of the first polymerizable compound. % Of the first polymerizable compound is contained in the polymerization component (part of the polymerization component) initially charged in the reaction vessel.
- the 2nd polymeric compound may be contained in the polymerization component (a part of polymerization component) initially thrown into reaction container, and may be contained in the remainder of a polymerization component.
- the second polymerizable compound (glyoxylic acid-modified product of (meth) acrylamide) is not contained as a polymerization component, glyoxylic acid and / or a salt thereof is preferably added together with the remainder of the polymerization component.
- the concentration of the polyacrylamide resin solution can also be adjusted by adding the solvent to the solution obtained by the polymerization.
- the concentration is, for example, 10% by mass or more, preferably 15% by mass or more, and for example, 50% by mass or less, preferably 45% by mass or less.
- the weight average molecular weight of the polyacrylamide resin is, for example, 1 million or more, preferably 1.5 million or more, more preferably 2 million or more, further preferably 3.5 million or more, and particularly preferably 4.5 million or more. For example, it is 15 million or less, preferably 10 million or less, more preferably 8 million or less, further preferably 7.5 million or less, and particularly preferably 6 million or less.
- the weight average molecular weight of the polyacrylamide resin is within the above range, when the polyacrylamide resin is used for paper production, it is possible to improve the strength of the paper, in particular, the internal bond strength of the paper.
- the aqueous property can be improved.
- the weight average molecular weight of the polyacrylamide resin can be adjusted as appropriate depending on, for example, the type of polymerization component and the blending amount.
- the viscosity of the polyacrylamide resin is, for example, 100 mP ⁇ s or more, preferably 1000 mP ⁇ s or more, more preferably 3000 mP ⁇ s or more, For example, it is 50000 mP ⁇ s or less, preferably 20000 mP ⁇ s or less, and more preferably 10000 mP ⁇ s or less.
- the measuring method of a viscosity is based on the Example mentioned later.
- the polyacrylamide resin thus obtained has at least one kind of the first unit represented by the above formulas (1) to (4) and the second unit represented by the above formula (5). Therefore, when used for paper manufacture, it is possible to improve the strength of the paper, particularly the internal bond strength of the paper, and to improve the drainage.
- the polyacrylamide resin includes a structural unit derived from the first polymerizable compound (the first unit represented by the above formulas (1) to (4)) and a structural unit derived from the second polymerizable compound (the above formula The second unit represented by (5)), a structural unit derived from (meth) acrylamide, a structural unit derived from an anionic polymerizable monomer, and a structural unit derived from (meth) allylsulfonate.
- a structural unit derived from the first polymerizable compound (the first unit represented by the above formulas (1) to (4)) and a structural unit derived from the second polymerizable compound (the above formula (5)).
- Second unit a structural unit derived from (meth) acrylamide, and a structural unit derived from (meth) allylsulfonate.
- the polyacrylamide resin includes a structural unit derived from the first polymerizable compound (the first unit represented by the above formulas (1) to (4)) and a structural unit derived from the second polymerizable compound (the above formula The second unit represented by (5)), a structural unit derived from (meth) acrylamide, a structural unit derived from an anionic polymerizable monomer, and a structural unit derived from (meth) allylsulfonate.
- the internal bond strength of paper can be further improved.
- the polyacrylamide resin comprises a structural unit derived from the first polymerizable compound (first unit represented by the above formulas (1) to (4)) and a structural unit derived from the second polymerizable compound ( The second unit represented by the above formula (5)), a structural unit derived from (meth) acrylamide, and a structural unit derived from (meth) allyl sulfonate.
- first unit represented by the above formulas (1) to (4) a structural unit derived from the second polymerizable compound
- the second unit represented by the above formula (5) a structural unit derived from (meth) acrylamide
- a structural unit derived from (meth) allyl sulfonate According to such a polyacrylamide resin, the drainage can be further improved.
- the polyacrylamide resin is preferably used as a paper-making additive for paper used in various industrial fields.
- the present invention also includes a paper additive containing the polyacrylamide resin.
- the papermaking additive of the present invention contains the polyacrylamide resin described above.
- the above polyacrylamide resin is blended in water, and the polyacrylamide resin is dispersed by a known dispersion method.
- water and polyacrylamide resin are mixed and dispersed by a known dispersion method such as mechanical dispersion using a dispersion apparatus.
- Examples of the dispersing device used for mechanical dispersion include a known mixer, an ultrasonic homogenizer, and a high-pressure homogenizer.
- the dispersion condition is not particularly limited, and is set as appropriate according to the type of apparatus.
- the polyacrylamide resin can be dispersed in water.
- the polyacrylamide resin is synthesized in water by the above method, and the obtained aqueous solution of the polyacrylamide resin can be used as it is as a papermaking additive.
- the concentration of the polyacrylamide resin in the papermaking additive is, for example, 10% by mass or more, preferably 20% by mass or more, and for example, 50% by mass or less, preferably 45% by mass or less.
- Such a papermaking additive uses the polyacrylamide resin described above, so when used in the manufacture of paper, it can improve the strength of the paper, especially the internal bond strength of the paper, and The drainage can be improved.
- paper is produced by adding the papermaking additive to the pulp slurry and wet papermaking.
- wet papermaking method There are no particular limitations on the wet papermaking method, and any known method can be adopted, and it can be widely applied to various types of papermaking regardless of acidic paper using aluminum sulfate as a fixing agent or neutral paper using calcium carbonate as a filler.
- Examples of paper obtained by wet papermaking include newsprint paper, ink jet paper, heat-sensitive recording base paper, pressure-sensitive recording base paper, high-quality paper, paperboard, coated paper, household paper, and other papers.
- the blending ratio of the papermaking additive (polyacrylamide resin) and the pulp slurry is not particularly limited, but the polyacrylamide resin is, for example, 0.001 part by mass or more, preferably 0.005 part by mass with respect to 100 parts by mass of the pulp slurry. Part or more, for example, 5.0 parts by mass or less, preferably 2.0 parts by mass or less.
- the paper obtained in this way contains the polyacrylamide resin of this invention, it is obtained with high productivity and is excellent in intensity
- Example 1 As a part of the polymerization component, 15 mol% of the total amount of the polymerization components described in Table 1 was prepared, and diluted with tap water so that the concentration became 10% by mass.
- sulfuric acid was added to the solution to adjust the pH to about 2.5.
- ammonium persulfate (APS) as a polymerization initiator was dropped to initiate polymerization, and then the remainder (85 mol%) of the polymerization component was dropped.
- ammonium persulfate APS
- APS ammonium persulfate
- sodium sulfite (Na 2 SO 3 ) as a polymerization terminator and dilution water were added and cooled to obtain an aqueous solution of a polyacrylamide resin.
- the solid content concentration of the aqueous solution was 20.1% by mass.
- Examples 9-10 As a part of the polymerization component, 15 mol% of the total amount of the polymerization components described in Table 1 was prepared, and diluted with tap water so that the concentration became 10% by mass.
- sulfuric acid was added to the solution to adjust the pH to about 2.5.
- ammonium persulfate (APS) as a polymerization initiator was dropped to initiate polymerization, and then the remainder of the polymerization component (85 mol%) and the polymerization component Then, a mixed solution of glyoxylic acid at 3.6 mol% was added dropwise.
- APS ammonium persulfate
- ammonium persulfate APS
- APS ammonium persulfate
- sodium sulfite (Na 2 SO 3 ) as a polymerization terminator and dilution water were added and cooled to obtain an aqueous solution of a polyacrylamide resin.
- the solid content concentration of the aqueous solution was 20.5% by mass. Moreover, it carried out similarly to Example 1, and measured the viscosity in 25 degreeC of aqueous solution, and the weight average molecular weight (Mw) of polyacrylamide resin. The results are shown in Table 1.
- Example 11 As a part of the polymerization component, 15 mol% of the total amount of the polymerization components described in Table 1 was prepared, and diluted with tap water so that the concentration became 10% by mass.
- sulfuric acid was added to the solution to adjust the pH to about 2.5.
- ammonium persulfate (APS) as a polymerization initiator was dropped to initiate polymerization, and then the remainder (85 mol%) of the polymerization component was dropped.
- ammonium persulfate APS
- APS ammonium persulfate
- the solid content concentration of the aqueous solution was 20.9% by mass. Moreover, it carried out similarly to Example 1, and measured the viscosity in 25 degreeC of aqueous solution, and the weight average molecular weight (Mw) of polyacrylamide resin. The results are shown in Table 1.
- BKP bleached kraft pulp
- LKP hardwood pulp
- NNKP conifer pulp
- CSF CSF: Drainage
- the obtained pulp slurry was stirred at 400 rpm, and a polyacrylamide resin aqueous solution diluted to 1.2% by mass was added 1 minute after the start of stirring.
- the addition amount of aqueous solution was adjusted so that the solid content might be 1.5 mass% with respect to the absolute dry pulp mass.
- paper strength (internal bond [mJ]) was evaluated by the following method.
- the internal bond (IB) of the paper was measured according to 18-2 “Paper and paperboard—Test method for internal bond strength—Part 2: Internal bond tester method”.
- the pulp slurry to which the aqueous solution of the polyacrylamide resin is added is diluted with tap water adjusted to pH 7 so that the pulp slurry concentration becomes 0.3%, and 1000 mL of the pulp slurry is used to JIS P 811-2 ( CSF (ml) was measured according to 2012).
- Example 6 in which the second polymerizable compound was added to the polymerization component was internal.
- the bond value increased by 33 and the freeness value increased by 40.
- Example 6 in Comparative Example 6 in which the polymerization component contains the second polymerizable compound and no first polymerizable compound, in Example 6 in which the first polymerizable compound was added to the polymerization component, the internal bond value was Increased by 29 and the drainage value increased by 25.
- the polyacrylamide resin, paper additive and paper of the present invention are suitably used in newsprint paper, ink jet paper, thermal recording base paper, pressure sensitive recording base paper, fine paper, board paper, coated paper, household paper and the like.
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Abstract
Description
また、本発明[2]は、上記式(3)または上記式(4)で示され、かつ、XがCl-を示す第1ユニットを有する、上記[1]に記載のポリアクリルアミド樹脂を含んでいる。
上記式(1)~(2)において、R1は、水素原子、メチル基、エチル基またはベンジル基を示す。R1として、好ましくは、水素原子、メチル基が挙げられ、より好ましくは、メチル基が挙げられる。
重合成分の一部として、表1に記載される重合成分の仕込み総量の15mol%を用意し、濃度が10質量%になるように水道水で希釈した。
B型粘度計(ローターNo.3、12rpm)(TVB-10型粘度計 東機産業社製)を使用して、25℃における粘度を、JIS K 7117-1(1999年)に準拠して測定した。
サンプルをpH7のリン酸緩衝液に溶解させ、試料濃度を1.0g/Lとして、ゲルパーミエーションクロマトグラフィー(GPC)によって測定し、得られたクロマトグラム(チャート)から、サンプルの重量平均分子量(Mw)を算出した。測定装置及び測定条件を以下に示す。
装置:品番TDA-302(Viscotek社製)
カラム:品番TSKgel GMPWXL(東ソー社製)
移動相:リン酸緩衝液
カラム流量:0.8mL/min
試料濃度:1.0g/L
注入量:500μL
実施例2~8および比較例1~6
表1~2に示す配合処方とした以外は、実施例1と同様にして、ポリアクリルアミド樹脂の水溶液を得た。また、実施例1と同様にして、水溶液の25℃における粘度、ポリアクリルアミド樹脂の重量平均分子量(Mw)を測定した。その結果を表1~2に示す。
重合成分の一部として、表1に記載される重合成分の仕込み総量の15mol%を用意し、濃度が10質量%になるように水道水で希釈した。
重合成分の一部として、表1に記載される重合成分の仕込み総量の15mol%を用意し、濃度が10質量%になるように水道水で希釈した。
DM:ジメチルアミノエチルメタクリレート
DADMAC:ジアリルジメチルアンモニウムクロライド
AmGlyA:アクリルアミド-N-グリコール酸
<評価>
(1)インターナルボンド
各実施例および各比較例において得られたポリアクリルアミド樹脂の水溶液を用いて、以下の方法で紙を製造した。
紙の製造工程における濾水性を、下記の手順で評価した。
重量平均分子量が450万のポリアクリルアミド樹脂を製造した比較例2、比較例4、比較例6および実施例6における、各重合成分中の第1重合性化合物および第2重合性化合物の有無と、その評価結果とを、表3に示す。
Claims (4)
- 上記式(3)または上記式(4)で示され、かつ、XがCl-を示す第1ユニットを有する、請求項1に記載のポリアクリルアミド樹脂。
- 請求項1に記載のポリアクリルアミド樹脂を含有することを特徴とする、製紙添加剤。
- 請求項1に記載のポリアクリルアミド樹脂を含有することを特徴とする、紙。
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CA2964394A CA2964394C (en) | 2015-10-30 | 2016-10-14 | Polyacrylamide resin, papermaking additive, and paper |
US15/519,656 US9908959B2 (en) | 2015-10-30 | 2016-10-14 | Polyacrylamide resin, papermaking additive, and paper |
EP16859588.2A EP3354666B1 (en) | 2015-10-30 | 2016-10-14 | Use of an polyacrylamide resin as papermaking additive and paper |
CN201680003282.8A CN107075036B (zh) | 2015-10-30 | 2016-10-14 | 聚丙烯酰胺树脂、造纸添加剂和纸 |
ES16859588T ES2883601T3 (es) | 2015-10-30 | 2016-10-14 | Uso de una resina de poliacrilamida como aditivo para la fabricación de papel y papel |
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US11311473B2 (en) | 2016-12-12 | 2022-04-26 | Clariant International Ltd | Use of a bio-based polymer in a cosmetic, dermatological or pharmaceutical composition |
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WO2014080628A1 (ja) * | 2012-11-21 | 2014-05-30 | 星光Pmc株式会社 | ポリアクリルアミド系表面紙力剤及び紙の製造方法 |
JP2015040207A (ja) * | 2013-08-23 | 2015-03-02 | 東邦化学工業株式会社 | 低分子量両性共重合体を含む毛髪処理用組成物 |
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NZ243311A (en) * | 1991-06-28 | 1995-02-24 | Calgon Corp | Composition for treatment of skin and nails which comprises an ampholyte terpolymer comprising non-ionic, cationic and anionic monomers |
JP4465561B2 (ja) | 1999-03-24 | 2010-05-19 | 荒川化学工業株式会社 | 製紙用内部添加剤および紙の製造方法 |
CN101133212A (zh) * | 2004-12-29 | 2008-02-27 | 赫尔克里士公司 | 造纸中留着和滤水的改进 |
US20060137843A1 (en) | 2004-12-29 | 2006-06-29 | Sutman Frank J | Retention and drainage in the manufacture of paper |
JP5618213B2 (ja) * | 2011-05-31 | 2014-11-05 | 星光Pmc株式会社 | ポリアクリルアミド系内添紙力剤および紙の製造方法 |
KR20160082540A (ko) * | 2013-11-08 | 2016-07-08 | 솔레니스 테크놀러지스, 엘.피. | 초지기 배수제 및 지력 강화제를 위한 계면활성제 기반 브라운 스톡 세척 보조제 처리법 |
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JPH06212597A (ja) * | 1993-01-20 | 1994-08-02 | Nitto Boseki Co Ltd | 製紙用薬剤 |
JP2011236532A (ja) * | 2010-05-13 | 2011-11-24 | Seiko Pmc Corp | 板紙の製造方法 |
WO2014080628A1 (ja) * | 2012-11-21 | 2014-05-30 | 星光Pmc株式会社 | ポリアクリルアミド系表面紙力剤及び紙の製造方法 |
JP2015040207A (ja) * | 2013-08-23 | 2015-03-02 | 東邦化学工業株式会社 | 低分子量両性共重合体を含む毛髪処理用組成物 |
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