JP2006160920A - Fatty acid metal salt composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a material which has an excellent dusting-preventing effect and is used for coated paper lubricants. <P>SOLUTION: This fatty acid metal salt composition is characterized by comprising a fatty acid metal salt (a) and a metal hydroxide (b). The content of the component (b) is preferably 5 to 29 mol.% based on the total mol number of the components (a) and (b), and the acid value (AV) of the fatty acid metal salt composition is preferably -7 to -55. The component (b) is preferably calcium hydroxide, magnesium hydroxide, barium hydroxide and/or zinc hydroxide. The fatty acid constituting the component (a) is preferably 4 to 30C saturated monocarboxylic acids and/or 4 to 30C unsaturated monocarboxylic acids. The metal constituting the component (a) is preferably at least one metal selected from the group consisting of calcium, magnesium, barium and zinc. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fatty acid metal salt composition. More specifically, the present invention relates to a fatty acid metal salt composition suitable for coated paper.

  In order to prevent dusting when the coated paper is subjected to calender roll treatment or backing roll treatment, a fatty acid metal salt (Patent Document 1), a fatty acid metal salt and an amine-based curing agent (Patent Document 2) are used as a lubricant for coated paper. It is known to be contained in.

JP 59-230632 A JP-A-8-60598

    Conventional lubricants are insufficient in dusting prevention effect, and more excellent dusting prevention effect is required. That is, the objective of this invention is providing the material used for the lubricant for coated paper which has the outstanding dusting prevention effect.

  As a result of intensive studies to solve such problems, the present inventors have completed the present invention by using a specific fatty acid metal salt composition. That is, the gist of the feature of the fatty acid metal salt composition of the present invention is that it contains the fatty acid metal salt (a) and the metal hydroxide (b).

  The fatty acid metal salt composition of the present invention has a remarkably excellent dusting prevention effect, particularly when applied to a lubricant for coated paper, and exhibits a very good dusting prevention effect. Even when the coating paint is applied to paper at a high speed, if the fatty acid metal salt composition of the present invention is contained in the coating paint, the backing roll and the calendar roll are very little soiled. Therefore, even in such a case, if the fatty acid metal salt composition of the present invention is used, the number of washings of the backing roll and calendar roll can be greatly reduced, and the operability of the coated paper manufacturing process can be significantly improved. . The reason for this is that the metal hydroxide in the fatty acid metal salt composition reacts with the carboxylic acid of the latex in the coating liquid, and as a result, the adhesiveness of the coating liquid to the backing roll and calendar roll weakens, and dusting occurs. It is estimated that it becomes difficult.

Examples of the metal hydroxide (b) include calcium hydroxide, magnesium hydroxide, strontium hydroxide, barium hydroxide, zinc hydroxide, cadmium hydroxide, tin hydroxide, lead hydroxide and lithium hydroxide. Of these, calcium hydroxide, magnesium hydroxide, strontium hydroxide, barium hydroxide, zinc hydroxide, tin hydroxide and lead hydroxide are preferable from the viewpoint of dusting prevention effect, and more preferably calcium hydroxide, Magnesium hydroxide, barium hydroxide, zinc hydroxide, tin hydroxide and lead hydroxide, particularly preferably calcium hydroxide, magnesium hydroxide, barium hydroxide and zinc hydroxide.
These metal hydroxides (b) may be one kind or a mixture of two or more kinds.

Examples of the fatty acid constituting the fatty acid metal salt composition (a) include monocarboxylic acid, dicarboxylic acid, and tricarboxylic acid.
Examples of the monocarboxylic acid include saturated monocarboxylic acids having 4 to 30 carbon atoms and unsaturated monocarboxylic acids having 4 to 30 carbon atoms.
As the saturated monocarboxylic acid, aliphatic saturated linear monocarboxylic acid, aliphatic saturated branched monocarboxylic acid, alicyclic saturated monocarboxylic acid and the like can be used.

  Examples of aliphatic saturated linear monocarboxylic acids include butanoic acid, pentanoic acid, caproic acid, heptanoic acid, caprylic acid, nonanoic acid, capric acid, undecanoic acid, lauric acid, tridecanoic acid, myristic acid, pentadecanoic acid, palmitic acid, Examples include heptadecanoic acid, stearic acid, nonadecanoic acid, eicosanoic acid, docosanoic acid, tetracosanoic acid, hexacosanoic acid, octacosanoic acid and triacontanoic acid.

  Examples of the aliphatic saturated branched carboxylic acid include 2-methylpropanoic acid, 2-ethylpentanoic acid, 2-methylheptanoic acid, 2-ethyloctanoic acid, 2-methylundecanoic acid, 2-ethyltetradecanoic acid, and 2-methylheptadecane. Examples include acid, 2-methyltricosanoic acid, and 2-ethyloctacosanoic acid.

  Examples of the alicyclic saturated monocarboxylic acid include cyclobutane carboxylic acid, cyclopentane carboxylic acid, cyclohexane carboxylic acid, cyclooctane carboxylic acid, 2-cyclohexyl ethanoic acid, 3-cyclohexyl propanoic acid, 4-cyclohexyl butanoic acid, and 6-cyclohexyl hexane. Acid, 8-cyclohexyloctanoic acid, 12-cyclohexyldodecanoic acid, 16-cyclohexyltetradecanoic acid, 18-cyclohexyloctadecanoic acid, 2- (carboxycyclohexyl) -2-cyclohexylpropane, 4- (cyclohexyl) cyclohexanecarboxylic acid and 24-cyclohexyl Examples include lignoceric acid.

As unsaturated monocarboxylic acid, aliphatic unsaturated linear monocarboxylic acid, aliphatic unsaturated branched monocarboxylic acid, alicyclic unsaturated monocarboxylic acid, aromatic monocarboxylic acid and the like can be used.
Aliphatic unsaturated linear monocarboxylic acids include butenoic acid, pentenoic acid, hexenoic acid, heptenoic acid, octenoic acid, nonenoic acid, decenoic acid, undecenoic acid, dodecenoic acid, tetradecenoic acid, hexadecenoic acid, octadecenoic acid, eicosenoic acid , Docosenoic acid, tetracosenoic acid, linoleic acid, eleostearic acid, linolenic acid, parinaric acid, arachidonic acid, talylic acid, stearolic acid, and behenolic acid.

  Examples of the aliphatic unsaturated branched monocarboxylic acid include 2-methyl-3-butenoic acid, 2-ethyl-5-hexenoic acid, 2-methyl-10-undecenoic acid, 2-ethyl-15-hexadecenoic acid, 2-methyl -22-tricosenoic acid and 2-ethyl-27-octacosenoic acid.

  Examples of the alicyclic unsaturated monocarboxylic acid include 2-cyclobutenecarboxylic acid, 2-cyclopentenecarboxylic acid, 3-cyclohexenecarboxylic acid, 4-cyclooctenecarboxylic acid, 2- (2-cyclohexenyl) ethanoic acid, 2 -(3-cyclohexenyl) propanoic acid, 4- (2-cyclohexenyl) butanoic acid, 5- (2-cyclohexenyl) hexanoic acid, 8- (3-cyclohexenyl) octanoic acid, 12- (2-cyclohexenyl) ) Dodecanoic acid, 14- (2-cyclohexenyl) tetradecanoic acid and 18- (3-cyclohexenyl) octadecanoic acid.

  Examples of aromatic monocarboxylic acids include benzenecarboxylic acid (benzoic acid), phenylethanoic acid, 3-phenylpropanoic acid, 4-phenylbutanoic acid, 5-phenylpentanoic acid, 6-phenylhexanoic acid, 8-phenyloctanoic acid, Examples include 10-phenyldecanoic acid, 12-phenyldodecanoic acid, 18-phenyloctadecanoic acid, 24-phenyltetracosanoic acid, naphthalenecarboxylic acid, 4-phenylbenzenecarboxylic acid, and 2- (carboxyphenyl) -2-phenylpropane. It is done.

Examples of the dicarboxylic acid include saturated dicarboxylic acids having 4 to 30 carbon atoms and unsaturated dicarboxylic acids having 4 to 30 carbon atoms.
As the saturated dicarboxylic acid, aliphatic saturated linear dicarboxylic acid, aliphatic saturated branched dicarboxylic acid, alicyclic saturated dicarboxylic acid and the like can be used.
Examples of the aliphatic saturated linear dicarboxylic acid include succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, 1,10-decanedicarboxylic acid, 1,12-dodecanedicarboxylic acid, 1,14 -Tetradecanedicarboxylic acid, 1,16-hexadecanedicarboxylic acid, 1,18-octadecanedicarboxylic acid, 1,24-tetracosanedicarboxylic acid, 1,30-triacontanedicarboxylic acid and the like.

Examples of the aliphatic saturated branched dicarboxylic acid include 2-methylpropane-1,3-dicarboxylic acid, 2-methyloctane-1,8-dicarboxylic acid, and 2-methyloctadecane-1,18-dicarboxylic acid.
Examples of the alicyclic dicarboxylic acid include 1,4-cyclohexanedicarboxylic acid, dimer acid, 4- (carboxycyclohexyl) cyclohexanecarboxylic acid, and 2,2-bis (carboxycyclohexyl) propane.

As unsaturated dicarboxylic acid, aliphatic unsaturated linear dicarboxylic acid, aliphatic unsaturated branched dicarboxylic acid, alicyclic unsaturated dicarboxylic acid, aromatic dicarboxylic acid and the like can be used.
Examples of the aliphatic unsaturated linear dicarboxylic acid include maleic acid, fumaric acid, 2-hexene-1,6-dicarboxylic acid, 2-octene-1,8-dicarboxylic acid, 2-decene-1,10-dicarboxylic acid, 2-dodecene-1,12-dicarboxylic acid, 2-hexadecene-1,16-dicarboxylic acid, 2-tetracocene-1,24-dicarboxylic acid, 2-triacontene-1,30-dicarboxylic acid and 2,6-octadiene -1,8-dicarboxylic acid and the like.

  Examples of the aliphatic unsaturated branched dicarboxylic acid include 2-methyl-2-butene-1,4-dicarboxylic acid, 2-methyl-2-octene-1,8-dicarboxylic acid and 2-methyl-2-octadecene-1, Examples thereof include 18-dicarboxylic acid.

  Examples of the alicyclic unsaturated dicarboxylic acid include 1,4- (2-cyclohexene) dicarboxylic acid and 4- (carboxycyclohexyl) -2-cyclohexenecarboxylic acid.

  Examples of the aromatic dicarboxylic acid include phthalic acid, terephthalic acid, isophthalic acid, naphthalenedicarboxylic acid, benzylsuccinic acid, 4- (carboxyphenyl) benzenecarboxylic acid, and 2,2-bis (carboxyphenyl) propane.

Examples of the tricarboxylic acid include aliphatic tricarboxylic acids having 6 to 30 carbon atoms and aromatic tricarboxylic acids.
Examples of the aliphatic tricarboxylic acid include aconitic acid {HO ₂ CCH ₂ C (CO ₂ H) ═CHCO ₂ H}, hexanetricarboxylic acid, octenetricarboxylic acid, cyclohexanetricarboxylic acid, citric acid, isocitric acid, and decanetricarboxylic acid. It is done.
Examples of the aromatic tricarboxylic acid include 1,3,5-benzenetricarboxylic acid, 1,2,4-benzenetricarboxylic acid, and naphthalenetricarboxylic acid.

  Of these, monocarboxylic acids are preferred, more preferably saturated monocarboxylic acids and unsaturated monocarboxylic acids, and then preferably aliphatic saturated linear monocarboxylic acids, aliphatic saturated branched monocarboxylic acids, aliphatic unsaturated straight-chains. Chain monocarboxylic acids, aliphatic unsaturated branched monocarboxylic acids and aromatic monocarboxylic acids, particularly preferably aliphatic saturated linear monocarboxylic acids and aliphatic unsaturated linear monocarboxylic acids.

  These carboxylic acids may be one kind or a mixture of two or more kinds, and animal and plant fatty acids (such as beef tallow fatty acid, coconut oil fatty acid and fish oil fatty acid) may be used. In the case of a mixture of two or more fatty acids, a combination of the above preferred fatty acids is preferred.

  Examples of the metal constituting the fatty acid metal salt (a) include calcium, magnesium, strontium, barium, zinc, cadmium, tin, lead and lithium. Of these, calcium, magnesium, strontium, barium, zinc, tin and lead are preferable from the viewpoint of dusting prevention effect, more preferably calcium, magnesium, barium, zinc, tin and lead, particularly preferably calcium and magnesium. , Barium and zinc.

  Examples of the fatty acid metal salt (a) include calcium stearate, magnesium stearate, barium stearate, zinc stearate, calcium palmitate, magnesium palmitate, zinc palmitate, calcium oleate, magnesium oleate, barium oleate, Preferred examples include zinc oleate, calcium myristate, magnesium myristate, myristic acid, calcium linoleate, magnesium linoleate, barium linoleate, zinc linoleate, calcium linolenate, magnesium linolenate, barium linolenate and zinc linolenate. . Of these, from the viewpoint of dusting prevention, etc., calcium stearate, magnesium stearate, zinc stearate, calcium palmitate, magnesium palmitate, zinc palmitate, calcium oleate, magnesium oleate, zinc oleate, calcium myristate , Magnesium myristate, zinc myristate, calcium linoleate, magnesium linoleate, zinc linoleate, calcium linolenate, magnesium linolenate and zinc linolenate, more preferably calcium stearate, magnesium stearate, zinc stearate, palmitic Calcium oxide, magnesium palmitate, zinc palmitate, calcium myristate, magnesium myristate, zinc myristate, Calcium Nord acid, magnesium linoleic acid and zinc linoleate, particularly preferably calcium stearate, magnesium stearate, calcium palmitate, magnesium palmitate, calcium myristate and magnesium myristate.

The content (mol%) of the fatty acid metal salt (a) is preferably 71 to 95, more preferably 79 to 93, based on the total number of moles of the fatty acid metal salt (a) and the metal hydroxide (b). Most preferably, it is 81-91. Within this range, the dusting prevention effect is further improved.
The content (mol%) of the metal hydroxide (b) is preferably 5 to 29, more preferably 7 to 21 based on the total number of moles of the fatty acid metal salt (a) and the metal hydroxide (b). Especially preferably, it is 9-19. Within this range, the dusting prevention effect is further improved.

The fatty acid metal salt composition of the present invention may further contain an emulsifying dispersant and other additives.
As the emulsifying dispersant, a known emulsifying dispersant can be used, and a surfactant and / or a water-soluble polymer is included.
As the surfactant, nonionic surfactants, anionic surfactants, cationic surfactants and amphoteric surfactants are used.
Nonionic surfactants include aliphatic alcohol (carbon number 8-24) alkylene oxide (carbon number 2-8) adduct (degree of polymerization 1-100) {dodecyl alcohol ethylene oxide addition (degree of polymerization 20) and 9- Octadecenyl alcohol ethylene oxide addition (polymerization degree 10), etc.}, polyalkylene glycol (carbon number 2-8, polymerization degree 1-100) higher fatty acid (carbon number 8-24) ester {polyethylene glycol (polymerization degree 20) Monooctadecanoic acid ester and polyethylene glycol (degree of polymerization 30) octadecanoic acid diester and the like}, polyvalent (2 to 10 valent) alcohol fatty acid (carbon number 8 to 24) ester {glycerin monooctadecanoic acid ester, ethylene glycol monooctadecanoic acid ester and Sorbitan octadecenoic acid mono- or di- Ester, etc.], polyoxyalkylene (carbon number 2-8, polymerization degree 1-100) polyhydric (3-10 valence) alcohol higher fatty acid (carbon number 8-24) ester {polyoxyethylene (polymerization degree 10) sorbitandodecane Acid mono- or di-ester, etc.}, aliphatic alkanolamide {coconut oil fatty acid monoethanolamide, dodecanoic acid diethanolamide, etc.}, polyoxyalkylene (carbon number 2-8, degree of polymerization 1-100) alkyl (carbon number 1 -22) phenyl ether {polyoxyethylene (degree of polymerization 20) nonylphenyl ether, etc.}, alkylamine (carbon number 8-24) alkylene oxide (carbon number 2-8) adduct (addition number 1-100) {dodecyl Amine ethylene oxide adduct (addition number 20), etc.}, and alkyl (carbon number 8-24) dialkyl (carbon 1-6) Amine oxide {dodecyldimethylamine oxide, etc.], polyoxyethylene / polyoxypropylene block copolymer (weight average molecular weight 150 to 10,000) {polyoxyethylene (degree of polymerization 50) / polyoxypropylene (degree of polymerization 50) ) Glycol} and the like.

  Examples of the anionic surfactant include alkyl (carbon number 8-24) polyoxyalkylene (carbon number 2-3, polymerization degree 1-100) carboxylic acid or a salt thereof (alkali metal salt, ammonium salt, etc.) {dodecyl polyoxy Ethylene (degree of polymerization 20) sodium ethanoate, etc.}, C 8-24 sulfate ester salt {sodium dodecyl sulfate, dodecyl polyoxyethylene (degree of polymerization 30) sulfate ester sodium}, C 8-24 sulfonic acid Salts {sodium dodecylbenzenesulfonate, di-2-ethylhexyl sulfosuccinate sodium, etc.}, phosphate esters having 8 to 24 carbon atoms {sodium dodecyl phosphate, sodium dodecylpolyoxyethylene (degree of polymerization 30) sodium phosphate}, Carboxylic acid alkali metal salt, ammonium salt or amino acid Salts {sodium dodecanoate, ammonium dodecanoate triethanolamine and undecanoate etc.}, an acyl amino acids coconut oil fatty acid methyl taurine sodium {cocoyl -L- glutamic acid triethanolamine}.

  Examples of the cationic surfactant include quaternary ammonium salt types {octadecyltrimethylammonium chloride, dioctadecyldimethylammonium chloride, etc.}, amine salt types {octadecanoic acid diethylaminoethylamide lactate, oleylamine lactate, etc.}.

  Examples of amphoteric surfactants include betaine-type amphoteric surfactants {coconut oil fatty acid amidopropyldimethylaminoacetic acid betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, etc.}, amino acid-type amphoteric surfactants {Sodium β-dodecylaminopropanoate, etc.}. One or more of these surfactants can be used.

  As the water-soluble polymer, a water-soluble anionic polymer, a water-soluble nonionic polymer, a water-soluble cationic polymer and a water-soluble amphoteric polymer can be used. Here, in the present invention, water-soluble means that the solubility in 100 g of water is 20 g (preferably 30 g) or more at 25 ° C.

  As the water-soluble anionic polymer, a water-soluble anionic polymer obtained by radical polymerization {polyacrylic acid (salt) (weight average molecular weight 2,000 to 100,000), polystyrene sulfonic acid (salt) (weight average molecular weight 1, 000-100,000), polyacrylic acid hydroxyethyl phosphate monoester (weight average molecular weight 2,000-50,000), etc.], water-soluble anionic polymer {naphthalene sulfonic acid ( Salt) formalin condensate (condensation degree 2 to 10 etc.) and water-soluble anionic polymer {ligninsulfonic acid (weight average molecular weight 10,000 to 1,000,000), alginic acid (salt) (weight) obtained from natural products Average molecular weight 10,000 to 1,000,000) etc.}.

  As the water-soluble nonionic polymer, a water-soluble nonionic polymer obtained by radical polymerization {polyvinyl alcohol (weight average molecular weight 5,000 to 100,000), polyacrylamide (weight average molecular weight 1,000 to 100,000), etc.} , Water-soluble nonionic polymers {polyethylene glycol (weight average molecular weight 2,000 to 1,000,000), etc.} obtained by non-radical polymerization (addition, etc.) and water-soluble nonionic polymers {methylcellulose ( Weight average molecular weight 1,000 to 1,000,000), hydroxyethyl cellulose (weight average molecular weight 1,000 to 1,000,000), etc.}.

  Examples of water-soluble cationic polymers include water-soluble cationic polymers obtained by radical polymerization {polyaminoethyl methacrylate (weight average molecular weight 1,000 to 50,000), etc.}, water-soluble cationic polymers obtained by non-radical polymerization {polyethylene. Polyamines (weight average molecular weight 1,000 to 100,000) etc.} and water-soluble cationic polymers obtained from natural products {cationized starch (weight average molecular weight 5,000 to 1,000,000) etc.} etc. .

Examples of the water-soluble amphoteric polymer include acrylic acid / aminoethyl methacrylate copolymer (weight average molecular weight 1,000 to 100,000).
Examples of the salt include an ammonium salt, an alkylamine (monoethylamine, monobutylamine, triethylamine, etc.) salt having 1 to 4 carbon atoms in the alkyl group, and an alkanolamine (monoethanolamine) having 1 to 4 carbon atoms in the alkanol , Diethanolamine, triethanolamine, etc.) salts, alkali metal (lithium, sodium, potassium, etc.) salts and alkaline earth metal (magnesium, calcium, zinc, etc.) salts, etc. It may be.

Of these emulsifying dispersants, surfactants are preferable, nonionic surfactants and anionic surfactants are more preferable, and nonionic surfactants are particularly preferable.
When the emulsifying dispersant is contained, the content (% by weight) is preferably 0.3 to 50, more preferably 0.4 to 20, particularly preferably 0, based on the weight of the fatty acid metal salt (a). 5-12. Within this range, there are few adverse effects on printability such as pick strength, water resistance and ink acceptability.

Other additives include water resistance agents, water retention agents, fluidity improvers, antifoaming agents (such as mineral oil-based antifoaming agents and silicone-based antifoaming agents), wetting agents, antioxidants, fluorescent whitening agents, An ultraviolet absorber and / or an antiseptic is included.
When other additives are contained, the content (% by weight) is preferably 0.001 to 25, more preferably 0.01 to 20, particularly preferably based on the weight of the fatty acid metal salt (a). 0.1-15.

The acid value (AV) of the fatty acid metal salt composition of the present invention is preferably -7 to -55, more preferably -11 to -37, and particularly preferably -14 to -33. Within this range, the dusting prevention effect is further improved.
The acid value (AV) is greatly influenced by the content of the metal hydroxide (b), and if the content of (b) is within the above preferred range, the acid value (AV) tends to be within the preferred range. . In addition to the content of the metal hydroxide (b), it is also affected by the content of the emulsifying dispersant and other additives.
This acid value (AV) is necessary to neutralize 1 g of fatty acid metal salt composition (in the case of containing an aqueous dispersion medium, converted to an evaporation residue not containing an aqueous dispersion medium) with hydrogen chloride (HCl). The value means a numerical value (mgKOH / g) expressed by weight (mg) of potassium hydroxide (KOH), and is measured as follows.

1 g of measurement sample is weighed and dissolved in 100 ml of isopropyl alcohol (JIS K8839), then an indicator (phenolphthalein aqueous solution) is dropped, and 5 ml of 0.1 mol / L hydrochloric acid aqueous solution is added, and the color of the indicator disappears. Confirm. If the color disappears, add another 5 ml of 0.1 mol / L aqueous hydrochloric acid until it disappears.
Then, according to JIS K0070-1992 “3.1 Neutralization Titration Method”, titration with 0.1 mol / L potassium hydroxide aqueous solution, and when the color of the indicator (light red) continues for 30 seconds, the end point is set. AV is calculated from the following equation. Separately, 1 g of the measurement sample was heated and dried at 130 ° C. for 45 minutes, and the ratio of the weight (e2) after heating to the weight (e1) before heating ((e2 / e1): evaporation residue (ER)} Calculate and use the following formula.

Where K: Amount of 0.1 mol / l potassium hydroxide aqueous solution required for titration (ml)
f: Factor of 0.1 mol / l potassium hydroxide aqueous solution H: Solution amount of added 0.1 mol / l hydrochloric acid aqueous solution (ml)
f ′: Factor of 0.1 mol / l hydrochloric acid aqueous solution S: Amount of measurement sample (g)

In addition, each content (weight%) of a fatty-acid metal salt (a) and a metal hydroxide (b) is computable from the acid value (AV) of a fatty-acid metal salt composition.
Where AV: acid value of fatty acid metal salt composition Mb: molecular weight of metal hydroxide ER: residue of evaporation of fatty acid metal salt composition (dry at 130 ° C. for 45 minutes)
n: When metal of metal hydroxide is monovalent: n = 1
When the metal of the metal hydroxide is divalent: n = 2
When the metal of the metal hydroxide is trivalent: n = 3

The fatty acid metal salt composition of the present invention may be in any form such as a dispersion liquid (aqueous dispersion liquid), a powder form, a granular form, a plate form, and a granular form. Among these, an aqueous dispersion liquid is preferable. Here, powder form, granular form and granular form are classifications distinguished by volume average particle diameter, and these volume average particle diameters are powder form: 0.1 to 1 μm, granular form: 1 μm to 1 mm, granular form: 1-10 mm. In addition, plate shape is a classification distinguished from powder, granular and granular (spherical or indeterminate) from the viewpoint of particle shape, and the volume average particle size in the case of plate is 0.1 μm to 10 mm. .
When the fatty acid metal salt composition is a dispersion liquid (aqueous dispersion liquid), the volume average particle diameter (μm) of the metal soap is preferably 0.01 to 50, more preferably 0.1 to 40, and particularly preferably 1 to 1. 30. Within this range, the lubrication performance is further improved.

  In addition, when the volume average particle size is larger than 100 μm, the volume average particle size is larger than 100 μm by using an image analysis method particle size analyzer {eg, Nikkiso Co., Ltd. particle size distribution measuring device Millitrack JPA} It is measured at a measurement temperature of 25 ° C. On the other hand, when the volume average particle size is 1 to 100 μm, the dispersion medium is deionized water and the measurement temperature is 25 ° C. using a laser diffraction particle size analyzer {eg, Microtrack HRA particle size analyzer manufactured by Nikkiso Co., Ltd.} Measured. When the volume average particle size is smaller than 1 μm, the dispersion medium is measured with deionized water and the measurement temperature is 25 ° C. using a laser Doppler particle size analyzer {eg, Microtrack UPA particle size analyzer manufactured by Nikkiso Co., Ltd.). Is done.

When the aqueous dispersion liquid is used, water or a mixed dispersion medium of water and a hydrophilic organic solvent can be used as the aqueous dispersion medium constituting the aqueous dispersion. Examples of the hydrophilic organic solvent include esters, ethers, ketones, alcohols and heterocyclic compounds.
As the ester, an ester having 3 to 7 carbon atoms can be used, and examples thereof include methyl acetate, ethyl acetate, butyl acetate, methoxybutyl acetate, methyl cellosolve acetate and ethyl cellosolve acetate.
As ether, C3-C8 ether etc. can be used, and ethyl cellosolve, butyl cellosolve, propylene glycol monomethyl ether, etc. are mentioned.
As a ketone, a C3-C6 ketone etc. can be used, Acetone, methyl ethyl ketone, methyl isobutyl ketone, etc. are mentioned.
Examples of the alcohol include alcohols having 1 to 9 carbon atoms such as methanol, ethanol, n- or i-propanol, n-, i- or t-butanol, propylene glycol, dipropylene glycol and tripropylene glycol. It is done.
As a heterocyclic compound, a C5-C8 heterocyclic compound etc. can be used, N-methylpyrrolidone, N-ethylcaprolactam, etc. are mentioned.
When a mixed dispersion medium of water and a hydrophilic organic solvent is used as the aqueous dispersion medium, the water / hydrophilic organic solvent content weight ratio is preferably 1 to 200, more preferably 1.5 to 100, and particularly preferably. 2-50.
Among the aqueous dispersion media, water, a mixed dispersion medium of water and ether, and a mixed dispersion medium of water and alcohol are preferable, and water is particularly preferable.

When the aqueous dispersion liquid is used, the content (% by weight) of the fatty acid metal salt composition is 5 to 90 based on the total amount of the aqueous dispersion medium and the fatty acid metal salt composition (hereinafter abbreviated as aqueous dispersion liquid). Is more preferable, 10 to 85 is more preferable, and 30 to 80 is particularly preferable. Within this range, the production efficiency of the aqueous dispersion liquid is further improved.
In this case, the content (% by weight) of the aqueous dispersion medium is preferably 10 to 95, more preferably 15 to 90, and particularly preferably 20 to 70, based on the weight of the aqueous dispersion liquid. Within this range, the production efficiency of the aqueous dispersion liquid is further improved.

The fatty acid metal salt of the present invention is obtained according to a known production method (for example, (1) metathesis method or (2) direct method: fatty acid chemistry <revision supplementary edition> issued by Miyuki Shobo Co., Ltd. on August 10, 1970) The method is not particularly limited.
When the fatty acid metal salt compound of the present invention is an aqueous dispersion liquid, (1) the presence of an emulsifying dispersant, if necessary, an aqueous fatty acid salt liquid (described below) and an aqueous metal hydroxide compound liquid (described below) A method of emulsifying and dispersing in an aqueous dispersion medium with a stirring mixer or an emulsifying disperser after reacting under or while reacting (metathesis method), (2) a fatty acid or fatty acid aqueous liquid melted at a melting point or higher The fatty acid metal salt produced is stirred and mixed after reacting in the presence of an emulsifying dispersant, if necessary, in the presence of an emulsifying dispersant, if necessary, in a metal hydroxide aqueous dispersion (described below) at a temperature of 50 to 90 ° C. A method (direct method) of emulsifying and dispersing with a machine or an emulsifying and dispersing machine can be applied.
In the case of using an emulsifying dispersant, either (1) metathesis method or (2) direct method may be added to any step during production.

(1) The double decomposition method will be described.
The fatty acid salt aqueous solution means a fatty acid salt aqueous solution and / or a fatty acid salt aqueous dispersion, and the fatty acid salt aqueous solution dissolves a fatty acid salt in an aqueous dispersion medium (the same as above and the preferred range is also the same). The solution and fatty acid salt aqueous dispersion mean a dispersion in which a fatty acid salt is dispersed in an aqueous dispersion medium. Examples of the fatty acid salt include alkali metal salts and ammonium salts of the above fatty acids. Of these, alkali metal salts are preferable, and sodium salts and potassium salts are more preferable.
The content (% by weight) of the fatty acid salt in the aqueous fatty acid salt solution is preferably from 0.1 to 50, more preferably from 1 to 40, particularly preferably from 2 to 30, based on the weight of the fatty acid salt aqueous solution. . Within this range, the production efficiency of the aqueous dispersion liquid is further improved.
The content (% by weight) of the aqueous dispersion medium in the fatty acid salt aqueous liquid is preferably 50 to 99.9, more preferably 60 to 99, particularly preferably 70 to 98, based on the weight of the fatty acid salt aqueous liquid. is there. Within this range, the production efficiency of the aqueous dispersion liquid is further improved.

  When using a fatty acid salt aqueous dispersion, the volume average particle size (μm) of the fatty acid salt in this dispersion is preferably 0.01 to 100, more preferably 0.1 to 50, and particularly preferably 1 to 30. It is. Within this range, dusting prevention performance is further improved.

  The aqueous fatty acid salt solution can be obtained by dissolving or emulsifying a fatty acid salt, an aqueous dispersion medium and, if necessary, an emulsifying dispersant by a usual method. In addition, when using an emulsifying dispersant, it may be added to the aqueous dispersion medium in advance, or may be added immediately before dissolution or emulsification dispersion.

The metal hydroxide aqueous liquid means a metal hydroxide aqueous solution and / or a metal hydroxide aqueous dispersion, and contains the metal hydroxide (b).
These metal hydroxide aqueous liquids may be either one kind or a mixture of two or more kinds.

  The content (% by weight) of the metal hydroxide in the metal hydroxide aqueous solution is preferably 20 to 80, more preferably 30 to 70, particularly preferably 40 based on the weight of the metal hydroxide aqueous solution. ~ 60. Within this range, the production efficiency of the aqueous dispersion liquid is further improved, and the dusting prevention effect is further improved.

The content (% by weight) of the aqueous dispersion medium in the aqueous metal hydroxide solution is preferably 20 to 80, more preferably 30 to 70, and particularly preferably 40 to 60. Within this range, the production efficiency of the aqueous dispersion liquid is further improved, and the dusting prevention effect is further improved.
When using an aqueous metal hydroxide dispersion, the volume average particle size (μm) of the metal hydroxide in the dispersion is preferably 0.01 to 100, more preferably 0.1 to 50, and particularly preferably. Is 0.5-30. Within this range, the reactivity and dusting prevention effect are further improved.

  The metal hydroxide aqueous solution can be obtained by dissolving or emulsifying and dispersing an aqueous dispersion medium and, if necessary, an emulsifying dispersant by an ordinary method. In addition, when using an emulsifying dispersant, it may be added to the aqueous dispersion medium in advance, or may be added immediately before dissolution or emulsification dispersion.

When the metal hydroxide (b) is reacted (metathesis reaction) between the fatty acid salt aqueous solution and the metal hydroxide aqueous solution, the total amount of (b) may be used or the batch usage of (b) } In this metathesis reaction, a part of (b) {equivalent to the fatty acid salt aqueous solution used} may be used, and the remaining (b) may be mixed after the metathesis reaction {divided use of (b) Law}.
In the case of the batch use method of (b), the use ratio of the fatty acid salt aqueous solution and the metal hydroxide aqueous solution is such that all carboxylate groups (—COO ⁻ ) of the fatty acid salt become metal salts (—COOM). It is preferable to use the metal hydroxide (b) so that the metal hydroxide (b) is present in an excess of 0.05 to 0.4 mol, more preferably 0.08 to 0.26, relative to 1 mol of the fatty acid metal salt (a). Particularly preferably, it is used so as to exist in an excess of 0.10 to 0.22 mol. Thus, as fatty acid salts, mixtures of monocarboxylates and dicarboxylates, mixtures of monocarboxylates and tricarboxylates, mixtures of dicarboxylates and tricarboxylates, monocarboxylates, dicarboxylates and tricarboxylates In the case of using a mixture of the above, or a mixture containing a poly (tetravalent or higher valent) carboxylate, the amount used may be determined so that the metal hydroxide (b) is stoichiometrically excessive. preferable. Within the above range, the reactivity and dusting prevention effect are further improved.

  For example, when only a monocarboxylate is used as the fatty acid salt, the use ratio {fatty acid salt / metal hydroxide: molar ratio) of the metal hydroxide and the fatty acid salt is preferably 1.4 to 2.0, More preferably, it is 1.5-1.90, Most preferably, it is 1.55-1.85. Similarly, when only the dicarboxylate is used, the use ratio is preferably 0.7 to 1.0, more preferably 0.75 to 0.95, and particularly preferably 0.78 to 0.93. is there. Similarly, when only the tricarboxylate is used, the use ratio is preferably 0.47 to 0.63, more preferably 0.5 to 0.62, and particularly preferably 0.52 to 0.58. is there.

In the case of the split usage of (b), the use ratio of the fatty acid salt aqueous liquid and the metal hydroxide aqueous liquid is such that all the carboxylate groups (—COO ⁻ ) of the fatty acid salt become metal salts (—COOM). It is preferable to use the metal hydroxide (b) so that it is present in an excess of 0.01 to 0.05 mol, more preferably 0.02 to 0.05, relative to 1 mol of the fatty acid metal salt (a). Particularly preferably, it is used so as to exist in a molar excess of 0.039 to 0.05. Thus, as fatty acid salts, mixtures of monocarboxylates and dicarboxylates, mixtures of monocarboxylates and tricarboxylates, mixtures of dicarboxylates and tricarboxylates, monocarboxylates, dicarboxylates and tricarboxylates In the case of using a mixture of the above, or a mixture containing a poly (tetravalent or higher valent) carboxylate, the amount used may be determined so that the metal hydroxide (b) is stoichiometrically excessive. preferable. Within the above range, the reactivity and dusting prevention effect are further improved.

  For example, when only the monocarboxylate is used as the fatty acid salt, the use ratio of the metal hydroxide and the fatty acid salt {fatty acid salt / metal hydroxide: molar ratio} is preferably 1.9 to 2.0, More preferably, it is 1.91-1.98, Most preferably, it is 1.92-1.96. Similarly, when only the dicarboxylate is used, the use ratio is preferably 0.95 to 1.0, more preferably 0.96 to 0.99, and particularly preferably 0.96 to 0.99. is there. Similarly, when only the tricarboxylate is used, the use ratio is preferably 0.47 to 0.67, more preferably 0.64 to 0.66, and particularly preferably 0.64 to 0.65. is there.

  The reaction temperature (° C) between the fatty acid salt aqueous solution and the metal hydroxide aqueous solution is preferably 50 to 95, more preferably 55 to 90, and particularly preferably 60 to 85. Within this range, the volume average particle diameter of the fatty acid metal salt (a) can be further improved, and as a result, the dusting prevention effect is further improved.

The production apparatus used in the metathesis method includes a stirrer and an emulsifier / disperser, and is not particularly limited as long as it can stir and mix the fatty acid salt aqueous solution and the metal hydroxide aqueous solution. Can be used. Examples of the stirring mixer include an impeller-type stirrer (propeller-type blade stirrer, paddle-type blade stirrer, turbine-type blade stirrer, etc.), a kneader, a line mixer, and a planetary mixer.
The emulsifying and dispersing machines include high-pressure jet type emulsifying and dispersing machines (gaurine homogenizers, microfluidizers, nanomizers, etc.), media type emulsifying and dispersing machines (sand grinders, agitator mills, ball mills, attritors, etc.), high-speed rotating centrifugal radiation type. Emulsifier disperser (Corres mixer, kneader, etc.), high-speed rotary shear type emulsifier disperser (homomixer, ultratax, etc.), grinding type emulsifier disperser (colloid mill, etc.) and mechanical oscillation emulsifier disperser (ultrasonic, etc.), etc. Is included.
These stirring mixers and emulsifiers / dispersers can be used in combination of two or more, and the stirring mixer and the emulsifier / disperser can also be used in combination.

In the metathesis method, the method of reacting the fatty acid salt aqueous solution and the metal hydroxide aqueous solution is not particularly limited. For example, 1) a method in which both are reacted together and 2) one is continuously dropped onto the other. Examples include a method of reacting, 3) a method in which one is divided into the other and reacting, and 4) a method in which one is divided into the other and continuously dropped and reacted. Of these, 2) and 4) are preferable, and the method 4) is more preferable.
In addition, in the method of 2) or 4), for example, when the production amount of the fatty acid metal salt composition of the present invention is 1 to 10,000 kg, the dropping time (min) of the fatty acid salt aqueous solution or the metal hydroxide aqueous solution is 10 -300 is preferable, More preferably, it is 15-240, Most preferably, it is 20-180.

Next, (2) the direct method will be described.
The fatty acid aqueous liquid means a fatty acid aqueous solution and / or a fatty acid aqueous dispersion, and the fatty acid aqueous solution means a solution obtained by dissolving a fatty acid in an aqueous dispersion medium (the same as above and the same preferable range), a fatty acid. The aqueous dispersion means a dispersion in which fatty acid is dispersed in an aqueous dispersion medium. Examples of fatty acids include the above fatty acids.
The content (% by weight) of the fatty acid in the fatty acid aqueous liquid is preferably 0.1 to 50, more preferably 1 to 40, and particularly preferably 2 to 30 based on the weight of the fatty acid aqueous liquid. Within this range, the production efficiency of the aqueous dispersion liquid is further improved.
The content (% by weight) of the aqueous dispersion medium in the fatty acid aqueous liquid is preferably 50 to 99.9, more preferably 60 to 99, and particularly preferably 70 to 98, based on the weight of the fatty acid aqueous liquid. Within this range, the production efficiency of the aqueous dispersion liquid is further improved.

When using an aqueous fatty acid dispersion, the volume average particle size (μm) of the fatty acid in the dispersion is preferably 0.01 to 100, more preferably 0.1 to 50, and particularly preferably 1 to 30. . Within this range, dusting prevention performance is further improved.
The fatty acid aqueous liquid is obtained by dissolving or emulsifying a fatty acid, an aqueous dispersion medium and, if necessary, an emulsifying dispersant by a usual method. In addition, when using an emulsifying dispersant, it may be added to the aqueous dispersion medium in advance, or may be added immediately before dissolution or emulsification dispersion.

The metal hydroxide (b) may be used in the total amount of (b) when the molten fatty acid or fatty acid aqueous liquid reacts with the metal hydroxide compound aqueous liquid (metathesis reaction). Collective use}, a part of (b) {equivalent to the fatty acid aqueous solution used} may be used in the metathesis reaction, and the remaining (b) may be mixed after the metathesis reaction {of (b) Split usage}.
In the case of the collective use method of (b), the use ratio of the molten fatty acid or fatty acid aqueous liquid and metal hydroxide aqueous liquid is such that all carboxy groups (—COOH) of the fatty acid become metal salts (—COOM). The metal hydroxide (b) is preferably used in an amount of 0.05 to 0.40 mole excess relative to 1 mole of the fatty acid metal salt (a), more preferably 0.08 to 0.26. Particularly preferably, it is used for a 0.10 to 0.22 molar excess. Thus, as fatty acids, mixtures of monocarboxylic acids and dicarboxylic acids, mixtures of monocarboxylic acids and tricarboxylic acids, mixtures of dicarboxylic acids and tricarboxylic acids, mixtures of monocarboxylic acids, dicarboxylic acids and tricarboxylic acids, or poly (tetravalent or higher) When using a mixture containing a carboxylic acid or the like, it is preferable to determine the amount used so that the metal hydroxide (b) is excessively stoichiometrically. Within the above range, the reactivity and dusting prevention effect are further improved.

  For example, when only monocarboxylic acid is used as the fatty acid, the use ratio of the metal hydroxide to the carboxylic acid {fatty acid / metal hydroxide: molar ratio} is preferably 1.4 to 2.0, more preferably 1. .5 to 1.9, particularly preferably 1.55 to 1.85. Similarly, when only the dicarboxylic acid is used, the use ratio is preferably 0.7 to 1.0, more preferably 0.75 to 0.95, and particularly preferably 0.78 to 0.93. is there. Similarly, when using only tricarboxylic acid, 0.47 to 0.63 is preferable, more preferably 0.5 to 0.62, and particularly preferably 0.52 to 0.58.

In the case of the split usage of (b), the use ratio of the fatty acid salt aqueous liquid and the metal hydroxide aqueous liquid is such that all the carboxylate groups (—COO ⁻ ) of the fatty acid salt become metal salts (—COOM). It is preferable to use the metal hydroxide (b) so that it is present in an excess of 0.01 to 0.05 mol, more preferably 0.02 to 0.05, relative to 1 mol of the fatty acid metal salt (a). Particularly preferably, it is used so as to be present in a molar excess of 0.03 to 0.05. Thus, as fatty acid salts, mixtures of monocarboxylates and dicarboxylates, mixtures of monocarboxylates and tricarboxylates, mixtures of dicarboxylates and tricarboxylates, monocarboxylates, dicarboxylates and tricarboxylates In the case of using a mixture of the above, or a mixture containing a poly (tetravalent or higher valent) carboxylate, the amount used may be determined so that the metal hydroxide (b) is stoichiometrically excessive. preferable. Within the above range, the reactivity and dusting prevention effect are further improved.

  For example, when only the monocarboxylate is used as the fatty acid salt, the use ratio of the metal hydroxide and the fatty acid salt {fatty acid salt / metal hydroxide: molar ratio} is preferably 1.9 to 2.0, More preferably, it is 1.91-1.98, Most preferably, it is 1.92-1.96. Similarly, when only the dicarboxylate is used, the use ratio is preferably 0.95 to 1.0, more preferably 0.96 to 0.99, and particularly preferably 0.96 to 0.99. is there. Similarly, when only the tricarboxylate is used, the use ratio is preferably 0.47 to 0.67, more preferably 0.64 to 0.66, and particularly preferably 0.64 to 0.65. is there.

  The reaction temperature (° C.) between the molten fatty acid or fatty aqueous liquid and the metal hydroxide aqueous liquid and the production apparatus are the same as in the case of (1) metathesis method, and the preferred range is also the same.

  In the direct method, the method of reacting the melted fatty acid or fatty acid aqueous solution with the metal hydroxide aqueous solution is not particularly limited. For example, 1) a method in which both are reacted together, and 2) one is continuous with the other. Examples thereof include a method of dropping (injecting) and reacting, 3) a method of injecting one into the other and reacting, and 4) a method of dividing one into the other and continuously dropping (injecting) and reacting. In 2) to 4), it is preferable to drop (inject) the fatty acid or the fatty acid aqueous liquid into the metal hydroxide aqueous liquid. Of these, 2) and 4) are preferable, and the method 4) is more preferable. In addition, in the method of 2) or 4), the production amount of the fatty acid metal salt composition of the present invention is, for example, 1 to 10,000 kg for the dropping (input) time (minute) of the fatty acid or fatty acid aqueous liquid or metal hydroxide aqueous liquid. In this case, 10 to 300 are preferable, 15 to 240 are more preferable, and 20 to 180 are more preferable.

  In any of the reaction steps of (1) metathesis method and (2) direct production method, when the stirring and mixing temperature is 70 ° C. or higher, it is preferably carried out in a sealed container (within a pressure-resistant sealed container) or a container with a reflux device. . In addition, when other additives (waterproofing agent, water retention agent, fluidity improver, antifoaming agent, lubricant, wetting agent, antioxidant, ultraviolet absorber, preservative, etc.) are added, fatty acid, fatty acid aqueous solution It may be contained in any of liquid, fatty acid salt aqueous liquid, or metal hydroxide aqueous liquid.

  The powdery and granular fatty acid metal salt composition can be obtained, for example, by using a fatty acid metal salt composition prepared in an aqueous dispersion using a spray dryer or the like (preferably treated at 150 ° C. or lower). It can also be obtained by mixing the fatty acid metal salt (a) and the metal hydroxide (b), followed by wet grinding or dry grinding.

The granular fatty acid metal salt composition can be obtained, for example, by subjecting a fatty acid metal salt composition prepared in an aqueous dispersion liquid to granulation and drying using an extrusion granulator, followed by sieving.
The plate-like fatty acid metal salt composition can be obtained, for example, by drying a fatty acid metal salt prepared in an aqueous dispersion into a sheet and then crushing it.

In the case of a dispersion liquid (aqueous dispersion liquid), the volume average particle diameter of the fatty acid metal salt composition can be adjusted by the shearing force of a stirring mixer and an emulsifying disperser. For example, a method of changing the discharge pressure of the emulsified dispersion in a high-pressure jet type emulsifying disperser, and a method of changing the rotation speed of a turbine or a stirring blade in a high-speed rotating shear type emulsifying disperser or a high-speed rotating centrifugal radiation type emulsifying disperser Can be prepared. Moreover, it can also adjust by changing the processing time of emulsification dispersion. That is, by applying a high shear force, the particle size of the emulsified dispersed particles tends to be small, and conversely, by applying a low shear force, the particle size tends to be large. In addition, the particle size is affected by the emulsification dispersion temperature. When temperature exceeds 90 degreeC, a volume average particle diameter will become large.
In the case of powder, granule, plate or granule, it can be adjusted as appropriate according to crushing conditions, pulverizing conditions, extrusion conditions, drying conditions, and the like.

  The fatty acid metal salt composition of the present invention can be used as a lubricant for coated paper, a release agent, a rubbing stain preventing agent, and a plastic stabilizer. Among these, it is suitable for a lubricant for coated paper, a release agent, and a rub-stain preventing agent, and further suitable for a lubricant for coated paper. These paper-making lubricants, mold release agents, anti-scraping agents, or plastic stabilizers can be added to various paints. Paper), cellophane, cloth, non-woven fabric, plastic, metal, wood, glass and earthenware. Among these, it is suitable for paper (coated paper).

  Examples of coated paper to which the lubricant for coated paper comprising the fatty acid metal salt composition of the present invention is applied include art paper, high-quality coated paper, medium-quality coated paper, high-quality lightweight coated paper, and medium-sized lightweight coated paper. , Cast coated paper, embossed paper, art post paper, fancy coated paper, pure white roll coat, dull coated paper, mat coated paper, fine coated fine paper, fine coated printing paper, and the like. Among these, it is suitable for art paper, high-quality coated paper, dull coated paper and mat coated paper, and further suitable for dull coated paper and mat coated paper.

As the base paper used for the coated paper, general high quality paper or medium quality paper produced from ordinary pulp is used. Examples of the pulp include chemical pulp, mechanical pulp, waste paper pulp, and non-wood pulp. As chemical pulp, CGP (chemi-ground pulp), SCP (semi-chemical pulp), SP (sulfite pulp), KP (craft pulp) and AP (alkali pulp), etc .; as mechanical pulp, GP (ground wood pulp), RMP (refiner mechanical pulp) and TMP (thermomechanical pulp), etc .; as waste paper pulp, disaggregated pulp, deinked pulp, etc .; as non-wood pulp, non-wood fibers such as pagas, kenaf, reed, straw, hemp or linter And synthetic pulps made from synthetic fibers such as pulp, nylon, vinylon, tetron, acrylic, rayon, polyolefin, and the like made into pulp.
As the base paper, a base paper or a synthetic paper mainly composed of pulp fibers having a basis weight of 40 to 300 g / m ² which is used for manufacturing a pigment coated paper can be used.

  The method of using the fatty acid metal salt composition of the present invention is not particularly limited, and may be applied to the coated surface as it is, or may be contained in a coating paint or the like. Among these, it is made to contain in a coating material.

Here, the coating paint to be applied to the printed material contains the fatty acid metal salt composition of the present invention, a pigment and an adhesive, and is applied to the printed material for the purpose of improving printability. It is to be covered.
When included in the coating paint, the content (% by weight) of the fatty acid metal salt composition of the present invention is preferably 0.05 to 10, more preferably 0.1 to 7, particularly preferably based on the weight of the pigment. Is 0.3-5. When in this range, the dusting prevention effect is further improved.

  The pigment contained in the coating composition includes inorganic pigments and organic pigments. Inorganic pigments include heavy calcium carbonate, light calcium carbonate, clay, calcined clay, delaminated clay, kaolin, calcined kaolin, delaminated kaolin, calcium carbonate, satin white, titanium oxide, aluminum oxide, hydrous silicic acid, Silica, calcium silicate, aluminum silicate, magnesium silicate, sodium aluminosilicate, magnesium aluminosilicate, diatomaceous earth, aluminum hydroxide, barium sulfate, iron oxide, manganese oxide, zinc oxide, calcium sulfate, talc, activated clay And diatomaceous earth. Examples of organic pigments include plastic pigment {polystyrene (weight average molecular weight 1,000 to 1,000,000), styrene / butadiene copolymer (copolymerization molar ratio 2/8, weight average molecular weight 5,000 to 1,000,000). 000), styrene / acrylic copolymer (copolymerization molar ratio 3/7, weight average molecular weight 2,000 to 500,000), polyethyl acrylate (weight average molecular weight 5,000 to 500,000)} and the like. It is done. These pigments can be used alone or as a mixture of two or more.

  The coating paint preferably contains heavy and / or light calcium carbonate as an essential component. When heavy and / or light calcium carbonate is included, the content (% by weight) is preferably 30 to 90, more preferably 45 to 87, particularly preferably 60 to 85, based on the weight of the coating composition. is there. Within this range, the whiteness and ink acceptability of the printed matter are further improved.

  The volume average particle size (μm) of the pigment is preferably 0.05 to 5, more preferably 0.08 to 4, and particularly preferably 0.1 to 3. That is, the volume average particle diameter (μm) of the pigment is preferably 0.05 or more, more preferably 0.08 or more, particularly preferably 0.1 or more, and preferably 5 or less, more preferably 4 or less. Particularly preferably, it is 3 or less. Within this range, the smoothness and ink fillability of the printed matter are further improved.

  As an adhesive contained in a coating material, an adhesive used in a normal coating material can be used, and a synthetic adhesive and a natural adhesive are included. Synthetic adhesives include styrene / butadiene copolymer, styrene / ethyl acrylate copolymer, polyvinyl acetate, polyacrylic acid, ethylene / vinyl acetate copolymer, methyl methacrylate / butadiene copolymer, butyl acrylate, Examples thereof include polyvinyl alcohol, maleic anhydride, and acrylic acid / methyl methacrylate copolymer. Examples of natural adhesives include oxidized starch, esterified starch, enzyme-modified starch, cold water soluble starch, phosphate esterified starch, hydroxyethylated starch, casein, and soy protein. The adhesive can be used alone or as a mixture of two or more. When the adhesive is included, the content (% by weight) is preferably 3 to 25, more preferably 5 to 20, particularly preferably 7 to 18, based on the weight of the coating composition. Within this range, the strength of the coating layer becomes further sufficient, and printability such as ink acceptability and fillability becomes even better.

  Coating paints include pigment dispersants such as sodium poly (meth) acrylate, sodium pyrophosphate and sodium hexametaphosphate, water resistance agents, water retention agents, fluidity improvers, defoamers (mineral oil defoamers and Silicone defoamers, etc.), lubricants {metal soap lubricants and polyethylene (weight average molecular weight 1,000-1,000,000) lubricants, etc.}, wetting agents, antioxidants, UV absorbers, colorants (dyes) And various auxiliary agents blended in ordinary coating materials such as preservatives and the like, if necessary. When these are contained, the content (% by weight) is preferably 0.001 to 5, more preferably 0.01 to 4, particularly preferably 0.1 to 3, based on the weight of the coating material. .

  Although the density | concentration (weight%) of a coating material changes with coating apparatuses and the desired coating amount, 20-80 are preferable, More preferably, it is 30-75, Most preferably, it is 40-70. When it is within this range, the stability of the coating composition is further improved, and handling is further facilitated. Here, the density | concentration of a coating material means the density | concentration based on the weight of the coating material of the fatty-acid metal salt composition of this invention, a pigment, and an adhesive agent.

  The coating paint can be obtained by a usual adjustment method. For example, the fatty acid metal salt composition of the present invention, a pigment, an adhesive, water and, if necessary, the above-mentioned various auxiliary agents are mixed so as to have the above-mentioned concentration. Prepare.

  When manufacturing a coated body (for example, coated paper) by applying a coating material to a coated body (for example, paper), a normal coating machine can be used, for example, blade coater, air knife coater, reverse rotation Examples thereof include a roll coater, a normal rotation roll coater, a curtain flow coater, a rod coater, a gravure coater, a die coater, a spray coater, an electrostatic coater, a notch bar coater, an air doctor coater, and a size press coater. With these coating machines, a single layer or two or more layers are coated on one surface or both surfaces of the substrate.

The coating amount (g / m ² ) of the coating material is preferably 5 to 40, more preferably 6 to 30, particularly preferably 7 to 30 in terms of dry mass (drying temperature 135 ° C., drying time 20 seconds) per side. It is. Furthermore, the coated body (for example, coated paper) may be subjected to a finishing process in order to adjust white paper gloss or improve printability. For the finishing treatment, a surface treatment apparatus (super calendar, mat calendar, soft nip calendar, machine calendar, etc.) can be used.

EXAMPLES Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to the following examples. Hereinafter, unless otherwise specified, “part” means “part by weight” and “%” means “% by weight”.
<Example 1>
A mixture of 211 parts of calcium hydroxide, 1350 parts of water, 150 parts of a polyoxyalkylene compound (Naroacti HN-100, Sanyo Chemical Industries Co., Ltd.) and a homomixer (TK homomixer MARK2 fmodel, Special Machine Industries Co., Ltd.) And mixed at 40 ° C. Subsequently, 50% (691 parts) of 1382 parts of stearic acid melted at 60 ° C. (AV = 210) melted at 60 ° C. while stirring with a homomixer was continuously dropped in 30 minutes (maintaining 40 to 60 ° C. ). Next, similarly, 40% (552.8 parts) was continuously dropped in 30 minutes (maintaining 50 to 60 ° C.). In the same manner, the remaining 10% (138.2 parts) was continuously added dropwise over 90 minutes (maintaining 50 to 60 ° C.). Then, the aqueous dispersion (1) (concentration 55%) of the fatty-acid metal salt composition of this invention was obtained by making it stir for 30 minutes at 50-60 degreeC.

<Examples 2 to 4>
Aqueous dispersions (2) to (4) of the fatty acid metal salt composition of the present invention in the same manner as in Example 1 except that the types and quantities of fatty acids and metal hydroxides were changed as shown in Table 1. (Concentration 55%) was obtained.

<Example 5>
An aqueous dispersion (5) (concentration) of the fatty acid metal salt composition of the present invention in the same manner as in Example 1, except that 211 parts of calcium hydroxide was changed to a mixture of 190 parts of calcium hydroxide and 17 parts of magnesium hydroxide. 55%).

<Example 6>
An aqueous dispersion (6) (concentration) of the fatty acid metal salt composition of the present invention, except that 211 parts of calcium hydroxide was changed to a mixture of 190 parts of calcium hydroxide and 28 parts of zinc hydroxide, in the same manner as in Example 1. 55%).

<Example 7>
An aqueous dispersion (7) (concentration) of the fatty acid metal salt composition of the present invention in the same manner as in Example 1, except that 211 parts of calcium hydroxide was changed to a mixture of 190 parts of calcium hydroxide and 49 parts of barium hydroxide. 55%).

<Example 8>
An aqueous dispersion (concentration 55%) of the fatty acid metal salt composition was obtained in the same manner as in Example 1 except that 211 parts of calcium hydroxide was changed to 191 parts of calcium hydroxide. An aqueous dispersion (8) (concentration 55%) of the fatty acid metal salt composition of the present invention was obtained by uniformly mixing 2980 parts of the aqueous dispersion of fatty acid metal salt composition and 20 parts of calcium hydroxide.

<Example 9>
The aqueous dispersion (1) of the fatty acid metal salt composition of the present invention obtained in Example 1 was dried at 140 ° C. with a spray dryer (SD-16 manufactured by Mitsui Mining Co., Ltd.) to obtain the fatty acid of the present invention. A metal salt composition (9) was obtained. When the volume average particle size was measured by a laser diffraction particle size analyzer {Microtrac HRA particle size analyzer manufactured by Nikkiso Co., Ltd., dispersion medium: deionized water, measurement temperature: 25 ° C} (the same applies hereinafter), the volume average particle size was 80 μm. .

<Example 10>
The aqueous dispersion (2) of the fatty acid metal salt composition of the present invention obtained in Example 2 was dried with a spray dryer at 140 ° C. to obtain the fatty acid metal salt composition (10) of the present invention. The volume average particle size was 70 μm.

<Example 11>
The aqueous dispersion (3) of the fatty acid metal salt composition of the present invention obtained in Example 3 was dried with a spray dryer at 140 ° C. to obtain the fatty acid metal salt composition (11) of the present invention. The volume average particle diameter was 90 μm.

<Example 12>
The fatty acid metal salt composition (12) of the present invention was obtained by drying the aqueous dispersion (4) of the fatty acid metal salt composition of the present invention obtained in Example 4 at 140 ° C. with a spray dryer. The volume average particle diameter was 90 μm.

<Comparative Example 1>
An aqueous dispersion (13) of a fatty acid metal salt composition (concentration 55%) was obtained in the same manner as in Example 1 except that 211 parts of calcium hydroxide was changed to 191 parts of calcium hydroxide.

<Comparative example 2>
An aqueous dispersion of a fatty acid metal salt composition (concentration 55%) in the same manner as in Example 1 except that 1382 parts of stearic acid and 211 parts of calcium hydroxide were changed to 1393 parts of beef tallow fatty acid and 257 parts of zinc hydroxide, respectively. (14) was obtained.

For the aqueous dispersions (1) to (8), (13) and (14), and the powders (9) to (12), the following evaluation measurement methods for dusting prevention, slipperiness, pick strength and releasability The results are shown in Table 2.

<Dusting prevention>
40 parts of light calcium carbonate (volume made by Okutama Kogyo Co., Ltd., Tamapearl TP-222H), 60 parts of kaolin (manufactured by ENGELHARD MINERAL & CHEMICALS, Ultra White 90), dispersant (manufactured by Sannopco), SN Dispersant 5040), 0.1 part of sodium hydroxide and 65 parts of water were mixed and dispersed for 30 minutes with a homodisper {manufactured by Shimazaki Seisakusho, ROTARY AJITER SH2Z} (3000 rpm), A dispersion was obtained.
Next, 10 parts of styrene-butadiene latex (manufactured by JSR Co., Ltd., JSR0695) and 3 parts of oxidized starch (manufactured by Nippon Food Processing Co., Ltd., MS-3600) were added to this dispersion, and then a sample for evaluation was displayed. Each was added in the addition amount shown in 2, and stirred and mixed with a homodisper (3000 rpm) for 15 minutes to obtain a coating paint having a concentration of 65%.
Next, this coated paint is applied to a high-quality paper base paper (KB-34, manufactured by KOKUYO Co., Ltd.) having a basis weight of 64 g / m ^{2 so that} the coat weight (basis weight) is 15 g / m ^2. After coating with a coater (MLC-100L, manufactured by Osugi Co., Ltd.) (speed: 300 m / s), it was dried at 135 ° C. for 20 seconds to obtain a coated paper (30 × 20 cm). At the same time, a coating paper (blank) containing no evaluation sample was applied and dried in the same manner as a blank to prepare a coated paper (blank).
The obtained coated paper was passed once through a super calendar {manufactured by Marukyo Giken Co., Ltd.} at a temperature of 100 ° C. and a linear pressure of 150 kg / cm, and the dirt on the chilled roll surface was observed. The dusting prevention property was evaluated.
○: Dirt is hardly observed on the roll surface.
Δ: Slight dirt is observed on the roll surface.
X: Many stains are observed on the roll surface.

<Anti-sticking property>
To 12 parts of styrene-butadiene latex (JSR0695 manufactured by JSR Co., Ltd.), the addition amount and water shown in Table 2 were added to the sample for evaluation, and the mixture was stirred and mixed. Got.
The above coating material was applied to a PET film (Toray Industries, Lumirror, film thickness 100 μm) with No. After coating with a 14 bar coater (made by RD SWESTER NY), it was dried at 100 ° C. for 60 seconds to prepare a coated paper (30 × 20 cm). As a blank, a coating paint (blank) containing no sample for evaluation was similarly applied and dried to prepare a coated paper (blank).
Next, water is applied to the vat, and the coated surface of the PET film is overlaid on black drawing paper (recycled color drawing paper No. C-35 made by Daio Paper Co., Ltd.) immersed in deionized water at 25 ° C. for 30 seconds. Then, the paper was passed through a super calendar at a temperature of 25 ° C. and a linear pressure of 50 kg / cm, and immediately after the paper was passed, the PET film and black drawing paper were peeled off to visually observe the degree of contamination of the PET film and evaluated according to the following criteria. .
○: Stain is hardly observed on the paper.
Δ: Slight stains are observed on the paper.
X: Many stains are observed on the paper.

<Slipperiness>
For coated paper obtained by applying and drying in the same manner as in the dusting prevention evaluation, according to JIS P8147 (1994), using a slip tester (Toyo Baldwin Co., Ltd., Tensilon UTIII type), The coefficient of dynamic friction between the coated paper surfaces was measured under conditions of a temperature of 25 ° C. and a humidity of 60%. The smaller the number, the better the slipperiness.

<Releasability>
The addition amount and water shown in Table 2 were added to 12 parts of styrene-butadiene latex (JSR0695, manufactured by JSR Co., Ltd.), mixed with stirring, and a coating paint having a concentration of 25% by weight was obtained. It was.
The above coating paint was applied to a high-quality paper base paper (KB-34, manufactured by KOKUYO Co., Ltd.) having a basis weight of 64 g / m ² . After coating with a 12 bar coater (manufactured by RD SWESTER NY), it was dried at 135 ° C. for 20 seconds to prepare a coated paper (30 × 20 cm). As a blank, a coated paint (blank) containing no lubricant for coated paper was similarly applied and dried to prepare a coated paper (blank).
Next, the paper was passed through a super calendar at a temperature of 70 ° C. and a linear pressure of 100 kg / cm, and the peel strength from the chilled roll surface of the coated paper stuck to the chilled roll 2 seconds after passing through the nip was measured using a tensile strength measuring instrument {Nippon Special Instrument The measurement was carried out using LRU-20N} manufactured by Co., Ltd. The smaller the peel strength, the better the releasability.

<Pick strength>
The coated paper obtained by coating and drying in the same manner as the dusting prevention evaluation was passed twice through a super calendar at a temperature of 50 ° C. and a linear pressure of 80 kg / cm, and a printability tester {Ishikawajima Industrial Machinery ( Co., Ltd., RI-1 type} was used to measure the pick strength of the coated paper. Evaluation was evaluated by the ◯ △ × method.
○: Scratches are hardly observed on the paper.
Δ: Slight blur is observed on the paper.
×: Many spots are observed on the paper surface.

  Compared with the composition of the comparative example, the fatty acid metal salt composition of the present invention exhibits excellent dusting prevention performance and latex anti-sticking property at a low addition amount, and also with normal calcium stearate (Comparative Example 1) In comparison, the releasability is good. In addition, in Comparative Example 2, when the addition amount is increased from 0.3 to 2.0, a decrease in pick strength is observed, but in the Example, even if the addition amount is increased from 0.3% to 2%, it is compared with the blank and Comparative Example 2. And pick strength hardly decreases. This indicates that the fatty acid metal salt composition of the present invention suppresses calendar roll and backing roll contamination and does not adversely affect printability.

The fatty acid metal salt composition of the present invention can be used for the purpose of improving operability and paper quality in the coated paper manufacturing process. In particular, it is suitable as a lubricant added to a coating solution for producing coated paper.

Claims (7)

A fatty acid metal salt composition comprising a fatty acid metal salt (a) and a metal hydroxide (b). The content of the metal hydroxide (b) is 5 to 29 mol% based on the total number of moles of the fatty acid metal salt (a) and the metal hydroxide (b), and the acid value of the fatty acid metal salt composition ( The fatty acid metal salt composition according to claim 1, wherein AV) is -4 to -55. The fatty acid metal salt composition according to claim 1 or 2, wherein the metal hydroxide (b) is calcium hydroxide, magnesium hydroxide, barium hydroxide and / or zinc hydroxide. The fatty acid constituting the fatty acid metal salt (a) is a saturated monocarboxylic acid having 4 to 30 carbon atoms and / or an unsaturated monocarboxylic acid having 4 to 30 carbon atoms, and the metal constituting (a) is calcium, magnesium, The fatty acid metal salt composition according to claim 1 or 2, which is at least one selected from the group consisting of barium and zinc. A lubricant for coated paper comprising the fatty acid metal salt composition according to any one of claims 1 to 4. The lubricant for coated paper according to claim 5, a pigment and an adhesive, and the content of the lubricant for coated paper is 0.05 to 10 parts by weight with respect to 100 parts by weight of the pigment. A certain paint. Coated paper comprising a coating base paper was coated as coating dry weight of the coating material coated paint is 0.1 to 20 g / m ² according to claim 6.