WO2004061229A1 - 非接触型塗工用共重合体ラテックス及びそれを含む組成物並びに塗工紙及びその製造方法 - Google Patents
非接触型塗工用共重合体ラテックス及びそれを含む組成物並びに塗工紙及びその製造方法 Download PDFInfo
- Publication number
- WO2004061229A1 WO2004061229A1 PCT/JP2003/016447 JP0316447W WO2004061229A1 WO 2004061229 A1 WO2004061229 A1 WO 2004061229A1 JP 0316447 W JP0316447 W JP 0316447W WO 2004061229 A1 WO2004061229 A1 WO 2004061229A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mass
- coating
- paper
- monomer
- copolymer latex
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
-
- 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
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
-
- 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
- D21H5/00—Special paper or cardboard not otherwise provided for
- D21H5/0005—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating
- D21H5/0042—Processes or apparatus specially adapted for applying liquids or other fluent materials to finished paper or board, e.g. impregnating, coating by pouring or allowing to flow in a continuous stream onto the surface, the entire stream being carried away by the paper
- D21H5/0045—Falling curtain method
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
-
- 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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
- D21H21/52—Additives of definite length or shape
-
- 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
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
- D21H23/48—Curtain coaters
-
- 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
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/50—Spraying or projecting
Definitions
- Non-contact type copolymer latex for coating composition containing the same, coated paper and method for producing the same
- the present invention relates to a non-contact type copolymer latex, a composition containing the same, a coated paper and a method for producing the same, and more particularly, to a non-contact type coating method such as curtain coating or spray coating.
- a copolymer latex and a composition containing the same which are more suitable and can be used as a coated paper having excellent surface strength, water resistance and print gloss, and a good operability using this composition.
- the present invention relates to a coated paper to be used and a manufacturing method thereof.
- the coated paper of the present invention can be widely used in the paper industry, printing field, and the like. Further, the present invention provides offset printing paper (high-speed offset printing paper, etc.), gravure printing paper, letterpress printing paper, inkjet paper, electrophotographic paper, art book paper, magazine cover paper, book portrait paper, poster paper, catalogs It can be used for paper, calendar paper, pamphlet paper, magazine text paper, magazine color page paper, flyer paper, postcard paper, card paper, etc. Background art
- coated paper coated with a coating liquid (paper coating composition) containing a white pigment such as kaolin and calcium carbonate and an aqueous binder as main components is manufactured.
- a coating liquid paper coating composition
- a white pigment such as kaolin and calcium carbonate
- an aqueous binder as main components
- curtain coating and spray coating are non-contact coating methods, so that stress is not applied to the paper, paper breakage is unlikely to occur even when high-speed coating is performed, and thin base paper with a low basis weight, Coating is possible even on base paper with a large amount of filler and low strength. From such a viewpoint, production of coated paper by using a non-contact type coating method such as force coating is being studied. However, curtain coating and spray coating are not yet generally used in the production of coated paper. The main reasons are as follows.
- the coating layer becomes bulky, but (1) the strength of the coating layer becomes weaker, for example, compared to the case of blade coating, and (2) the coating having many voids. Due to the layer structure, there are problems such as excessive ink absorption and insufficient print gloss. As a means to prevent these problems, it is conceivable to use a large amount of binder, but this is not preferable because it will increase the cost significantly.
- Paddling is the release of coating liquid (large and small droplets) near the point of contact between the flowing coating liquid and the base paper. If paddling occurs, a ripple-like coating failure will occur, and all of the parts will be wasted, causing enormous damage. At the same time, paper breakage and dirt are likely to occur, and the production efficiency and workability are greatly damaged. This paddling is more likely to occur as the viscosity of the coating liquid is lower and as the coating speed is higher. If the viscosity of the coating liquid is increased, paddling can be reduced, but it is difficult to form a good strength film, and even if it is formed, it is difficult to obtain good elongation and spread on the coating base paper.
- the coating liquid is hardly pushed into the coating base paper, so if the surface tension of the coating liquid is not sufficiently low and the flowability is not good, the surface of the coating base paper will be poor. Cannot be wet quickly and sufficiently. If the surface of the coated base paper is not sufficiently wetted, it will be affected by the surface shape and will have coating defects on the coated paper surface (fine pores that are not coated with pigment on the coated paper surface). ) Occurs. If the obtained coated paper has a coating defect, it is not preferable because unevenness of the surface of the blank paper and printing unevenness are caused. Coating defects can be reduced by slowing the coating speed, but this is an undesirable factor that impairs productivity.
- the coating liquid is ejected from a nozzle at a high pressure as a fine mist due to the principle of coating.
- the coating liquid cannot be satisfactorily sprayed from the tip of the nozzle. Therefore, in these non-contact coatings, for example, good printing suitability can be obtained at a high coating speed comparable to blade coating, and new latencies and new coatings with good operability are obtained.
- Liquid (composition for paper coating) Formulation and a new method of manufacturing coated paper are required. Disclosure of the invention
- An object of the present invention is to solve the problems of an increase in binder content and a decrease in printing gloss when producing coated paper by a non-contact coating method such as curtain coating or spray coating.
- the object of the present invention is to provide curtain coating with good productivity (high-speed coating property and high solid content), and to obtain coated paper of excellent quality (low coating defect, good covering property and good paper surface feeling).
- An object of the present invention is to provide a paper coating composition. It is another object of the present invention to provide an excellent quality coated paper coated with the paper coating composition. It is still another object of the present invention to provide a method for producing a coated paper of excellent quality by using the paper coating composition with high productivity by force coating.
- the present inventors have made intensive studies in view of the present situation, and as a result, completed the present invention.
- the present invention achieves the above object, and includes the following.
- Aliphatic conjugated diene monomer (a) 23 to 58% by mass, ethylenically unsaturated calcium 0.1 to 7% by mass of a boric acid monomer (b), 5 to 40% by mass of a vinyl cyanide compound (c) and copolymerizable with the above monomers (a), (b) and (c) Other monomers (d) 0-71. From 9% by mass (the total amount of monomers (a), (b), (c) and (d) is 100% by mass). Is a copolymer latex obtained by emulsion polymerization of a monomer having an average particle diameter of 50 ⁇ ! A non-contact type copolymer latex having a thickness of from 150 to 150 nm. 2.
- a non-contact type copolymer latex for coating wherein a difference ⁇ ⁇ between a minimum temperature T 1 and a maximum temperature T 2 in a transition region in the curve is 5 ° C or more.
- the above-mentioned copolymer is [P 1] aliphatic conjugated diene monomer (a 1) 25-; L 00 mass%, ethylenically unsaturated carboxylic acid monomer (b 1) 0-10 mass% And 0 to 75% by mass of another monomer (d1) copolymerizable with the above-mentioned monomers (a1) and (b1) (however, the monomers (a1), (b1) and ( The total amount of d1) is 100% by mass.)
- a copolymer having a glass transition point in the range of 100 to 0 ° C obtained by polymerizing a monomer (ml) consisting of And (P2) an aliphatic conjugated diene monomer (a)
- a non-contact type paper coating composition characterized by having a viscosity of 50 to 150 OmPa ⁇ s and a dynamic surface tension value at a surface life of 1 Oms of 25 to 65 mNZm. 5. Further, a fine clay containing 95 to 9.9% by mass of a component having a particle size of less than 2 m, and a high-aspect clay containing 80 to 89% by mass of a component having a particle size of less than 2 m.
- the fine clay and the high aspect clay When the content ratio of the fine clay and the high aspect clay is 1Z3 to 51 and the total content is 100% by mass, the fine clay and the high aspect clay And a copolymer latex and a wetting agent, and when the total amount of the pigment is 100 parts by mass, the solid content of the copolymer latex is 5.
- the non-contact paper coating composition according to the above item 4 wherein the amount is 5 to 30 parts by mass, and the content of the wetting agent is 0.01 to 2 parts by mass.
- the above copolymer latex is composed of an aliphatic conjugated monomer (a) 30 to 60% by mass, an ethylenically unsaturated carboxylic acid monomer (b) 0:! Another monomer copolymerizable with the above monomers (a) and (b) (d) 33 to 699.9% by mass (provided that the monomers (a), (b) and (d) Is a total amount of 100% by mass.)
- the non-contact type paper coating composition containing the non-contact type copolymer latex according to any one of the above 1 to 3, or the non-contact type paper coating composition according to any of the above 4 to 6 A non-contact type paper coating composition, a coating step of coating the surface of the coating base paper at a coating speed of 600 to 280 mZ, and a drying step of drying the coating film.
- Coated paper manufacturing method characterized by the following.
- a method for producing coated paper comprising a step of applying a non-contact type paper coating composition containing a pigment to a surface of a coating base paper by a non-contact coating method
- the coated base paper has a centerline average roughness of 3 m or less in the frequency region of spatial frequency 25 (lZmm) or less and a centerline average in the frequency region of spatial frequency 25 (1 / mm) or more.
- a method for producing coated paper, wherein the roughness is 0.2 m or more.
- the non-contact type paper coating composition further contains a copolymer latex and a wetting agent, and when the total amount of the pigment is 100 parts by mass, the solid content of the copolymer latex is The method for producing a coated paper according to 8 or 9, wherein the content is 5 to 30 parts by mass, and the content of the wetting agent is 0.01 to 2 parts by mass.
- the above pigments are fine particles containing 95 to 99% by mass of components having a particle size of less than 2 m.
- the content of the other pigment is The method for producing a coated paper according to any one of the above items 8 to 10, wherein the content is 60% by mass or less.
- FIG. 1 is an enlarged schematic cross-sectional view of the vicinity of the surface of a coated base paper.
- FIG. 2 is a schematic cross-sectional enlarged view for explaining center line average roughness.
- non-contact type copolymer latex the non-contact type paper coating composition, and the method for producing coated paper.
- the first non-contact type copolymer latex for coating according to the present invention comprises (a) 23 to 58% by mass of an aliphatic conjugated monomer and (b) an ethylenically unsaturated carboxylic acid monomer. 1 to 7% by mass, vinyl cyanide compound (c) 5 to 40% by mass and the above monomer
- a polymer latex wherein the average particle size of the polymer particles contained in the latex is 50 to 150 nm.
- Examples of the aliphatic conjugated diene monomer (a) include 1,3-butadiene, isoprene, 2-chloro-1,3-butadiene, and chloroprene. Of these, 1,3-butadiene is preferred. In addition, these compounds can be used alone or in combination of two or more.
- This aliphatic conjugated gen system By using the monomer (a), the obtained copolymer can be imparted with appropriate flexibility and elongation, and a coated paper having impact resistance can be obtained.
- the amount of the above-mentioned fatty J3 male conjugated diene monomer (a) to be used is 23 to 58% by mass, preferably 30 to 50% by mass, more preferably 38 to 58% by mass based on all the monomers. ⁇ 48% by mass. If the amount of the aliphatic conjugated monomer (a) used is less than 23% by mass,
- the copolymer becomes too hard, and the adhesive strength tends to be hardly developed.
- the anchor effect is reduced because the paper coating composition is not pushed into the base paper for coating, and the copolymer effect is reduced. If the coated paper does not have sufficient adhesive strength, the strength of the coated paper obtained will decrease significantly.
- the coated paper obtained from the composition containing the copolymer latex also has reduced water resistance and print gloss. .
- Examples of the ethylenically unsaturated carboxylic acid monomer (b) include a monocarboxylic acid, a dicarboxylic acid, and a half ester of a dicarboxylic acid. These carboxylic acids preferably have 4 to 7 carbon atoms.
- Examples of the monocarboxylic acid include acrylic acid, methacrylic acid, crotonic acid and the like.
- Examples of the dicarboxylic acid include fumaric acid, maleic acid, and itaconic acid.
- Examples of the half-ester of dicarboxylic acid include methyl fumarate, ethyl ethyl maleate, ethyl ethyl itaconate, and the like.
- a carboxylic anhydride which forms a dicarboxylic acid in an aqueous medium can also be used.
- carboxylic acids can be used alone or in combination of two or more.
- the amount of the ethylenically unsaturated carboxylic acid monomer (b) used is the amount of the ethylenically unsaturated carboxylic acid monomer (b) used.
- the content is 0.1 to 7% by mass, preferably 0.3 to 5% by mass, and more preferably 0.5 to 3.5% by mass. If the amount of the ethylenically unsaturated carboxylic acid monomer (b) is less than 0.1% by mass, the stability of the latex at the time of polymerization is poor, and a large amount of coagulum may be generated. On the other hand, the above ethylenically unsaturated carboxylic acid monomer If the amount of (b) used exceeds 7% by mass, the viscosity of the coating liquid may become too high, which may hinder coating.
- vinyl cyanide compound (c) examples include acrylonitrile and methyl chloronitrile. These can be used alone or in combination of two or more.
- the amount of the cyanide biel compound (c) to be used is 5 to 40% by mass, preferably 10 to 35% by mass, more preferably 10 to 30% by mass, based on all monomers. is there. If the amount of the vinyl cyanide compound (c) used is less than 5% by mass, the absorption of the ink solvent into the copolymer is not sufficiently suppressed, so that the voids characteristic of the coating layer obtained by the non-contact coating method are used. In a coating layer structure with a lot of ink, excessive absorption of ink cannot be suppressed, and sufficient printing gloss cannot be obtained. On the other hand, the above vinyl cyanide compound
- the monomer (d) is not particularly limited as long as it is copolymerizable with the monomers (a), (b) and (c).
- aromatic vinyl compound examples include styrene, permethylstyrene, p-methylstyrene, vinyltoluene, and chlorostyrene. Of these, styrene is particularly preferred.
- alkyl (meth) acrylate examples include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and octyl (meth) acrylate.
- examples thereof include acrylate, benzyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, isopornyl (meth) acrylate, and 2-cyanoethyl (meth) acrylate.
- methyl meta Crylate is particularly preferred.
- acrylamide-based compound examples include acrylamide, methacrylamide, N, N-dimethylacrylamide, N, N-dimethylaminopropyl (methyl) acrylamide, and the like.
- Each of these monomers can be used alone or in combination of two or more.
- the amount of the monomer (d) used is 0 to 71.9% by mass, preferably 10 to 60% by mass, and more preferably 20 to 50% by mass based on all the monomers. It is.
- an emulsifier, a polymerization initiator, a molecular weight regulator and the like are usually used in an aqueous medium.
- an anionic surfactant As the emulsifier, an anionic surfactant, a nonionic surfactant, an amphoteric surfactant and the like can be used, and these can be used alone or in combination of two or more.
- anionic surfactant examples include higher alcohol sulfates, alkylbenzene sulfonates, aliphatic sulfonates, and polyethylene glycol alkyl ester sulfates.
- an alkyl ester type, an alkyl ether type, an alkyl phenyl ether type or the like of polyethylene daricol is used as the nonionic surfactant.
- amphoteric surfactant examples include those having a carboxylate, an ester sulfate, a sulfonate, or a phosphate as an anion portion and those having an amine salt or a quaternary ammonium salt as a cation portion. More specifically, betaines such as lauryl betaine and stearyl betaine, amino acid types such as lauryl-1-alanine, stearyl-] 3-alanine, lauryldi (aminoethyl) glycine, octyldi (aminoethyl) glycine, etc. And the like.
- Examples of the above-mentioned polymerization initiator include a water-soluble polymerization initiator, an oil-soluble polymerization initiator, and a redox-based polymerization initiator which allows these to coexist with a reducing agent.
- Examples of the water-soluble polymerization initiator include sodium persulfate, potassium persulfate, and ammonium persulfate.
- Examples of the oil-soluble polymerization initiator include benzoyl peroxide, lauryl peroxide, and 2,2′-azobisisobutyl nitrile. Each of these water-soluble polymerization initiators and oil-soluble polymerization initiators may be used alone or in combination of two or more. They can be used together.
- Examples of the reducing agent used in the redox polymerization initiator include elsorbic acid (including its salt), ascorbic acid (including its salt), saccharides, bisulfite, hydrogen thiosulfate, and mercapnone. No. These can be used alone or in combination of two or more.
- molecular weight regulator examples include halogenated hydrocarbons such as chloroform, carbon tetrabromide, n-hexylmercaptan, n-octylmercaptan, n-dodecylmercaptan, t-decylmercaptan, and thioglycol.
- halogenated hydrocarbons such as chloroform, carbon tetrabromide, n-hexylmercaptan, n-octylmercaptan, n-dodecylmercaptan, t-decylmercaptan, and thioglycol.
- Merilecaptans such as acids Xanthogens such as ids, Yuichi Pinolene, -methylstyrene dimer, 1,
- Any one that can be used in ordinary emulsion polymerization such as 1-diphenylethylene, can be used.
- a chelating agent, an inorganic electrolyte and the like can be used in the emulsion polymerization, and known ones can be used.
- the average particle size of the polymer particles contained in the copolymer latex of the present invention is from 50 to 15 O nm, preferably from 55 to; L 30 nm, and more preferably from 60 to L 10 nm.
- the high-speed fluidity of the paper coating composition decreases, and high-speed coating comparable to general blade coating is performed.
- the curtain film is stretched while receiving an intense share, and the coating liquid (paper coating composition) cannot spread and spread sufficiently.
- the working layer cannot be formed. If the average particle size of the polymer particles is less than 5 O nm, the fluidity of the coating liquid will not be improved, and the coated paper obtained will have significantly reduced white paper glossy pink transition. And even if it is smaller than 50 nm, the fluidity of the coating liquid is not improved.
- the type and amount of the emulsifier, the type and amount of the polymerization initiator, the monomer having a polar group It can be adjusted by the type and amount of monomer used, monomer concentration, polymerization temperature, etc.
- a method of increasing the amount of the emulsifier used can be mentioned.
- Emulsion polymerization may be carried out by polymerizing a part of the monomer and then adding the rest continuously or intermittently, or by adding the monomer continuously from the beginning of the polymerization. And the like.
- the polymerization temperature is usually from 20 to 85 ° C, preferably from 25 to 80 ° C.
- the polymerization time is usually 10 to 30 hours.
- the first non-contact type copolymer latex for coating of the present invention is obtained by emulsion-polymerizing the monomers (a), (b), (c) and (d).
- the amount of the monomer (c) used is 1
- the dry pick-up is carried out by the paper coating composition containing this latex.
- a coated paper having particularly excellent strength, wet topic strength and print gloss can be obtained.
- the second non-contact type copolymer latex for coating of the present invention comprises 20 to 80% by mass of a lipomeric conjugated monomer (a), an ethylenically unsaturated carboxylic acid monomer (b) 0.5 10 to 10 mass% and other monomers copolymerizable with these monomers (d) 20 to 79.5 mass% (the total amount of monomers (a), (b) and (d) Is obtained by copolymerizing a monomer consisting of: wherein the copolymer has at least two glass transition points in the range of ⁇ 100 to 50 ° C., and has a differential scanning calorimetry. In the differential calorific curve obtained by the meter, the difference ⁇ between the minimum temperature T 1 and the maximum temperature T 2 in the transition region is 5 ° C or more.
- the amount of the above-mentioned fatty JI male conjugated diene monomer (a) to be used is 20 to 80% by mass, preferably 25 to 75% by mass, more preferably 35 to 60% by mass based on all the monomers. It is. If the amount of the fat J3 fiber conjugated diene monomer (a) used is less than 20% by mass, the amount of the copolymer becomes too large, and the adhesive strength may be reduced. Meanwhile, the above fat If the amount of the conjugated diene monomer (a) exceeds 80% by mass, the tackiness will increase and the operability will deteriorate. In addition, the coated paper obtained from the composition containing the copolymer latex also deteriorates in water resistance and printing gloss.
- the amount of the ethylenically unsaturated carboxylic acid monomer (b) used is 5 to 10% by mass, preferably 0.8 to 8% by mass, more preferably 1 to 10% by mass, based on all the monomers. ⁇ 5% by mass. If the amount of the ethylenically unsaturated carboxylic acid monomer (b) is less than 0.5% by mass, the stability of the latex during polymerization is poor, and a large amount of coagulated product may be generated. On the other hand, if the use amount of the above-mentioned ethylenically unsaturated carboxylic acid monomer (b) exceeds 10% by mass, the viscosity of the coating liquid becomes too high, which may hinder coating.
- the monomer (d) is not particularly limited as long as it can be copolymerized with the monomers (a) and (b).
- the first non-contact type copolymer latex of the first non-contact type coating may be used. Examples thereof include an aromatic vinyl compound, a vinyl cyanide compound, an alkyl (meth) acrylate, an acrylamide compound, N-methylolacrylamide, and biel acetate, which are exemplified in the description. By using these compounds and changing the usage ratio of the monomers (a), (b), (c) and (d), a copolymer having an appropriate glass transition temperature according to the purpose is obtained. be able to.
- the amount of the monomer (d) used is from 20 to 79.5% by mass, preferably from 25 to 74.2% by mass, more preferably from 30 to 70% by mass based on all the monomers. 60% by mass. If the amount of the monomer (d) is less than 20% by mass, the tackiness may increase and the operability may deteriorate. On the other hand, when the amount of the monomer (d) exceeds 79.5% by mass, the copolymer becomes too hard, and the adhesive strength may be reduced.
- the second non-contact type copolymer latex of the present invention is obtained by preferably obtaining the above monomers (a), (b) and (d) by emulsion polymerization.
- the method of emulsion polymerization is described in the first non-contact type copolymer latex for coating. Can be the same as
- the second copolymer latex of the present invention only needs to have at least two glass transition points of the contained copolymer in the range of 100 to 50 ° C. Of course, there may be three or more.
- the copolymer has a difference ⁇ between the minimum temperature T1 and the maximum temperature T2 in the transition region of the differential calorimetric curve of 5 or more, preferably 8 ° C or more, more preferably 15 ° C or more. It is.
- the difference ⁇ is less than 5 ° C, high levels of printability cannot be maintained over a wide range of printing speeds. At the same time, the surface strength and impact resistance of the coated paper decrease, and the coated paper cannot withstand the shocking deformation caused by the extremely high deformation speed in high-speed printing.
- the minimum temperature T1 is preferably in the range of -1 oo to o ° c, and the maximum temperature T2 is preferably in the range of 20 to 50 ° C. It is preferable that the temperature is in the range of 5 ° C and the above T2 is in the range of 15 to 45 ° C.
- the adhesive strength is poor. If the glass transition point is less than -100 ° C, the tackiness increases and the operability deteriorates. Also, the water resistance and printing gloss of the coated paper are significantly deteriorated.
- the latex containing a copolymer having two or more glass transition points has a copolymer part [P 1] and a copolymer part [P2] shown below in the same particle, and has a different phase structure. It is preferred to form
- the copolymer portion [P1] is composed of 25 to 100% by mass of an aliphatic conjugated monomer (a1) and 0 to 10% by mass of an ethylenically unsaturated carboxylic acid monomer (b1). And other monomers (d1) copolymerizable with the above-mentioned monomers (al) and (bl) 0 to 75% by mass (provided that the monomers (a1), (b1) and (d The total amount of 1) is 100% by mass.) Is obtained by polymerizing a monomer (ml) consisting of
- the aliphatic conjugated monomer (a1) used for forming the copolymer portion [P1] the monomers exemplified above can be used.
- the amount of the fatty J3 conjugated gen-based monomer (a1) used is 25 to 100% by mass, preferably 35 to 90% by mass, and more preferably 40 to 80% by mass. When the amount of the aliphatic conjugated monomer (a1) used is less than 25% by mass, the copolymer becomes too hard and the bonding strength is poor.
- the ethylenically unsaturated carboxylic acid monomer (b 1) used for forming the copolymer moiety [P 1] the monomers exemplified above can be used.
- the amount of the ethylenically unsaturated carboxylic acid monomer (b1) used is from 0 to 10% by mass, preferably from 0 to 7% by mass, and more preferably from 0 to 3% by mass. If the amount of the above-mentioned ethylenically unsaturated carboxylic acid monomer (b1) is more than 10% by mass, the viscosity of the coating liquid becomes too high, which may hinder coating.
- the monomer (d 1) used for forming the copolymer portion (P 1) the monomer exemplified as the other copolymerizable monomer (d) may be used. Can be done.
- the amount of the monomer (d1) to be used is 0 to 75% by mass, preferably 10 to 65% by mass, and more preferably 20 to 55% by mass. If the amount of the monomer (d1) exceeds 75% by mass, the copolymer becomes too hard, and the adhesive strength is poor.
- the glass transition point of the above copolymer portion [P 1] is —100 to 0. C, preferably -80 to 15; more preferably 170 to 15; If the glass transition point exceeds 0 ° C, the adhesive strength will be poor.
- the aliphatic conjugated monomer (a2) used for forming the above-mentioned copolymer moiety [P2] the above-mentioned monomers can be used.
- the amount of the aliphatic co-active diene monomer (a2) used is 10 to 60% by mass, preferably 10 to 55% by mass, and more preferably 20 to 45% by mass.
- the amount of the aliphatic conjugated monomer (a2) used is less than 10% by mass, the copolymer becomes too hard and has poor adhesive strength.
- the amount of the aliphatic conjugated monomer (a 2) used exceeds 60% by mass, the tackiness increases and the operability deteriorates. Also, the water resistance and printing gloss of the coated paper are significantly deteriorated.
- the ethylenically unsaturated carboxylic acid monomer (b 2) used for forming the copolymer part [P2] the monomers exemplified above can be used.
- the amount of the ethylenically unsaturated carboxylic acid monomer (b2) used is 0.5 to 30% by mass, preferably 1 to 25% by mass, and more preferably 2 to 20% by mass. If the amount of the ethylenically unsaturated carboxylic acid monomer (b2) used is less than 0.5% by mass, the stability of the latex at the time of polymerization is poor, and a large amount of coagulated product may be generated. On the other hand, if the amount of the ethylenically unsaturated carboxylic acid monomer (b2) used exceeds 30% by mass, the viscosity of the coating liquid may be too high, which may hinder coating.
- the monomers exemplified as the other copolymerizable monomer (d) can be used.
- the amount of the monomer (d2) to be used is 10 to 89.5% by mass, preferably 20 to 89% by mass, more preferably 30 to 70% by mass. If the amount of the monomer (d2) used is less than 10% by mass, the tackiness will increase and the operability will deteriorate. On the other hand, if the amount of the monomer (d2) exceeds 89.5% by mass, the amount of the copolymer becomes too large and the adhesive strength is poor.
- the copolymer part [P2] is obtained by preferably subjecting the monomer (m2) composed of the monomers (a2), (b2) and (d2) to emulsion polymerization.
- the glass transition point of the copolymer part [P2] is in the range of ⁇ 20 ° C.
- the glass transition point is lower than ⁇ 20 ° C., the tackiness increases and the operability deteriorates. If the glass transition point exceeds 50 ° C., the copolymer becomes too hard and the adhesive strength is poor.
- the proportion of the copolymer part (P1) and the copolymer part (P2) is preferably 100 to 100 parts by weight of the total copolymer
- the copolymer part CP 1) is preferably 5 to 95 parts by weight, More preferably, it is 10 to 90 parts by mass, and still more preferably 15 to 80 parts by mass. If the constituent ratio of the copolymer part [P1] is less than 5 parts by mass, the adhesive strength may be insufficient, and if it exceeds 95 parts by mass, the operability is deteriorated.
- the second copolymer latex of the present invention has a copolymer portion having a low glass transition point and a copolymer portion having a high glass transition point in the same copolymer particles.
- the second copolymer latex When used for non-contact coating such as curtain coating and spray coating, it exhibits excellent operability and the coated paper obtained has a high level of adhesive strength. The printability can be maintained at a high level without causing picking or the like in a wide print speed range.
- the particle size of the polymer particles contained in the copolymer latex having the above constitution is usually 50 to 350 nm, preferably 60 to 350 nm, and more preferably 60 to 25 Onm.
- the minimum film forming temperature of the polymer contained in the copolymer latex of the present invention is preferably lower than 60 ° C, more preferably lower than 50 ° C, further preferably lower than 40 ° C. If the minimum film forming temperature exceeds 60 ° C, the adhesive strength will be poor.
- the copolymer latex having the above constitution is produced by emulsion polymerization, it is the same as in the case of the first non-contact type copolymer latex for coating, but preferably, it is prepared in advance similarly to the case of the shade polymerization.
- a method of polymerizing the united portion [P2] in at least two stages in the same polymerization vessel may be employed.
- the polymerization temperature is usually 5 to 50 ° C, more preferably 10 to 50 ° C when the copolymer part (P1) is polymerized, and when the copolymer part (P2) is polymerized. It is preferably from 10 to 80 ° C, more preferably from 15 to 75 ° C.
- the polymerization time is usually 10 to 30 hours.
- the copolymer part [P 1] preferably has a weight average molecular weight in terms of polystyrene of 100,000 or more, more preferably 150,000 or more. If the weight average molecular weight in terms of polystyrene of the above-mentioned copolymer portion [P1] is less than 100,000, sufficient adhesive strength cannot be obtained, the strength of the coating layer becomes weak, and printability such as picking becomes poor. The result is.
- the first and second non-contact type coating copolymer latexes can form a non-contact type paper coating composition together with other compounding agents such as a pigment.
- Examples of the pigment include an inorganic pigment and an organic pigment.
- examples of the inorganic pigment include clay such as kaolin, barium sulfate, titanium oxide calcium carbonate, satin white, talc, aluminum hydroxide, zinc oxide and the like.
- examples of the organic pigment include polymer particles such as hollow particles made of polystyrene and the like, and urea formalin resin. These can be used alone or in combination of two or more.
- the above-mentioned non-contact type coating copolymer latex is suitable as a binder. Therefore, the content ratio of the non-contact type copolymer latex and the pigment in such a non-contact type paper coating composition is as follows. That is, the solid content of the copolymer latex is preferably 5 to 30 parts by mass, more preferably 5 to 100 parts by mass of the pigment.
- binder other than the non-contact type copolymer latex examples include water-soluble substances such as casein, modified casein, starch, modified starch, polyvinyl alcohol, and propyloxymethyl cellulose.
- the amount used is preferably 0 to 100 parts by mass, more preferably 20 to 60 parts by mass, based on 100 parts by mass of the solid content of the copolymer latex. is there.
- the non-contact type paper coating composition includes various commonly used compounding agents, for example, It may optionally contain a viscosity adjuster, a pigment dispersant, a water resistance improver, a defoamer, a pH adjuster, a coloring pigment, a fluorescent dye and the like.
- viscosity modifier a water-soluble one is usually used.
- examples of the viscosity modifier include casein, modified casein, starch, modified starch, polyvinyl alcohol, and carboxymethylcellulose, which are exemplified as the binder component, as well as polycarboxylic acid-based, polyether-based, and modified polycarboxylic acid.
- System urethane-modified polyester system, modified polyacryl system, associative polyacryl system, and the like. These can be used alone or in combination of two or more.
- pigment dispersant examples include polycarboxylates, polyphosphates, pyrophosphates, hexametaphosphates, polyisoprenesulfonates, and condensed naphthalenesulfonates. These can be used alone or in combination of two or more.
- water resistance improver examples include a water resistance improver such as a zirconium compound, a polyamide resin, a polyamide resin, a melamine resin, a polyamide polyurea resin, and a polyamine polyurea resin. These can be used alone or in combination of two or more.
- a defoaming agent such as a silicone type, a silicone compound type, a hydrophobic silica type, a metal stone test type, a wax type, a wax emulsion type, a polyether type and an acetylene compound type is used. be able to. These can be used alone or in combination of two or more.
- pH adjuster examples include sodium hydroxide, 7j potassium potassium, ammonia water solution and the like. These are preferably in a dissociated state in the paper coating composition. These can be used alone or in combination of two or more.
- non-contact coating methods such as curtain coating and spray coating can provide coated paper with excellent print gloss, etc., sheet offset printing paper, web It is suitably used for offset printing paper and the like. It can also be used for various printing papers such as letterpress printing and gravure printing, and as a paper coating agent.
- the non-contact type paper coating composition of the present invention is characterized in that the viscosity is 50 to 1500 mPa's and the dynamic surface tension value at a surface life of 10 ms is 25 to 65 mNZm.
- the “viscosity” is 50 to 150 OmPa ⁇ s, preferably 50 to 120 OmPa ⁇ s, more preferably 50 to: L00 OmPa ⁇ s. If the viscosity of the non-contact paper coating composition is less than 5 OmPas, paddling is likely to occur during high-speed coating, and the paper coating composition excessively penetrates into the base paper for coating, which is good. It becomes difficult to obtain a proper coating. On the other hand, if it exceeds 150 OmPa ⁇ s, it is not preferable because 'tends to cause coating defects during high-speed coating and at high solids content.
- the “dynamic surface tension value” is 25 to 65 mN / m, preferably 25 to 6 OmNZm, more preferably 25 to 55 mNZm at a surface life of 1 Oms.
- the dynamic surface tension value of the non-contact type paper coating composition is less than 25 mNZm, the paper coating composition excessively penetrates the base paper for coating, and it becomes difficult to obtain a good coating. In addition, the paper coating composition easily foams, and the bubbles cause coating defects such as coating defects and coating defects.
- it exceeds 65 mNZm sufficient wettability to the coating base paper cannot be obtained at the time of high-speed coating, and coating defects are likely to occur, and paddling tends to occur.
- the dynamic surface tension value is a value measured by the maximum bubble pressure method, and the “surface life” is the elapsed time from the formation of the foam surface in this measurement. Therefore, the shorter the surface life is measured, the sooner the paper coating composition transitions from the flowing state to the stationary state, the closer to the flowing state, that is, the dynamic surface tension characteristics are measured. It will be.
- This dynamic surface tension value can be measured using, for example, a dynamic surface tensiometer (model “BP-2”) manufactured by Cruz.
- the preferred range of the viscosity and the preferred range of the dynamic surface tension value can be each combination. That is, for example, the viscosity is preferably 50 to 1200 mPa's, and the dynamic surface tension value at a surface life of 1 Oms is preferably 25 to 60 mN_m. More preferably, the viscosity is 50 to 100 OmPas, and the dynamic surface tension value at a surface life of 1 Oms is 25 to 55 mNZm.
- the composition for paper coating of the present invention has a coating speed of preferably 600 to 280 Om / min, more preferably 800 to 280 Om / min. Coating at a high speed of up to 250 OmZ, more preferably 100 to 250 OmZ, and particularly preferably 110 to 230 OmZ, with almost no coating defects. Can be done.
- the “solid content concentration” is the ratio (content) of the solid content contained in the non-contact paper coating composition of the present invention.
- the solid content concentration may be selected depending on the components constituting the paper coating composition and the composition thereof, but is preferably 50% by mass or more, more preferably 55% by mass or more, and still more preferably 6% by mass or more. 0 mass% or more.
- the solid content concentration is 50% by mass or more, a good coating can be obtained even at a high-speed coating, and coated paper with excellent surface quality can be efficiently produced.
- the solid content concentration is preferably 70% by mass or less, more preferably 67% by mass or less.
- the solid content concentration is 70% by mass or less, an increase in color viscosity is suppressed, and a stable force-tens film can be obtained.
- the upper limit and the lower limit of the solid content concentration can be set in any combination. That is, for example, the content is preferably from 50 to 70% by mass, more preferably from 55 to 70% by mass, still more preferably from 55 to 67% by mass, and from 60 to 70% by mass. Particularly preferred is 67% by mass. Since the present paper coating composition has the above-mentioned predetermined dynamic surface tension, it can be coated at a high speed even when the solid content concentration is high. In addition, this solid content concentration is a residue after heating and evaporation.
- the non-contact paper coating composition of the present invention has a viscosity of 50 to 150 mPas, and a dynamic surface tension value of 25 to 65 mNZm at a surface life of 1 Oms.
- the constituents of this composition are not particularly limited, but usually contain a wetting agent, a pigment and a copolymer latex.
- the above-mentioned "wetting agent” is a component which mainly exhibits the above-mentioned dynamic surface tension characteristics in the paper coating composition of the present invention.
- the wetting agent is not particularly limited as long as it can exhibit this property, and can be used alone or in combination of two or more, and an anionic surfactant is preferable.
- the carbon number of the linear portion (lipophilic group) in the molecule of the anionic surfactant is preferably 18 or less, more preferably 10 to 15, and still more preferably 12 or 13.
- the number of carbon atoms in the linear portion is preferably 18 Hereinafter, it is more preferably 10 to 15, further preferably 12 or 13, and the total number of carbon atoms is preferably 50 or less, and the lower limit is usually 16 or more. This is because the anionic surfactant has a high moving speed in the paper coating composition.
- the anionic surfactant functioning as a wetting agent include sulfonic acid surfactants, sulfate ester surfactants, and carboxylic acid surfactants. These may be used alone or in combination of two or more. They can be used in combination.
- sulfonic acid-based surfactant examples include alkylsulfonic acid, sulfosuccinic acid, alkylarylsulfonic acid, estersulfonic acid, alkylnaphthylenesulfonic acid, and N-acylsulfonic acid (all of them include salts thereof).
- sulfate ester surfactant examples include alkylaryl ether sulfate, ether sulfate, sulfated oil, ester sulfate, alkyl sulfate, amide sulfate, and the like (all of them include salts thereof).
- carboxylic acid surfactant examples include fatty acids and salts thereof (fatty acid soaps), rosin acids and salts thereof (rosin acid soaps), N-acylcarboxylic acids and salts thereof, and ether carboxylic acids and salts thereof.
- sulfonic acid surfactants and sulfate ester surfactants are preferred.
- at least one of alkylsulfonic acid, alkylarylsulfonic acid and estersulfonic acid is preferable, and among the above-mentioned sulfate ester surfactants, alkylarylether sulfate and At least one of ether sulfates is preferred.
- the content of the wetting agent in the paper coating composition is not particularly limited, but is usually 0.01 to 2 parts by mass when the entire pigment described below is 100 parts by mass. Preferably, it is 0.01 to 1.5 parts by mass, more preferably 0.02 to 1 part by mass.
- the content of the wetting agent is 0.01 parts by mass or more, the dynamic surface tension can be effectively reduced, and the dynamic surface tension characteristics can be sufficiently exhibited.
- the affinity between the pigment and the base paper for coating is improved, and the occurrence of the paddling phenomenon can be effectively suppressed.
- the content of the wetting agent is 2 parts by mass or less, the composition is effectively prevented from sinking into the coated base paper when the paper coating composition is applied to the coated base paper. Can be maintained. Also, bubbles are generated in the paper coating composition. Is effectively prevented, and coating defects can be prevented.
- the “pigment” is not particularly limited, and the pigments exemplified above can be used.
- Examples of the pigment used in the non-contact paper coating composition include fine-grained clay.
- pc1 coarse-grained clay
- pc2 high aspect clay
- These clays can be used in combination with the inorganic pigments and the organic pigments exemplified above.
- fine clay refers to a pigment containing 95 to 99% by mass of a component having a particle size of less than 2 m. This particle size distribution complies with ⁇ ⁇ TEST MET HODS T649 cm-90 ”.
- Examples of the fine clay (pe l) include Hydra Gloss, Hydra Gloss 90, Hydra Gloss 92, Hydra Lux 91, Hyuga Bagros, Hyuga Bagros 2000, Japan Daroth, Hydra Glaze (all manufactured by Huyba), Miller Darros, Mira Daros 91, Mira Gross, Ultra Darros 90 (from Engelhard), Alpha Fine, DB Darez (from Imelis), Power Fine, 'Kao Fine 90 (from Seal), Amazon SD , Amazon Premium (all made by Kadam). Of these, Amazon SD and Amazon Premium are preferred. These can be used alone or in combination of two or more.
- the “high aspect clay (pc 2)” refers to a component with a particle size of less than 2 m.
- Pigment containing 0 to 89% by mass This particle size distribution complies with "TAPP I TEST METHODS T649 cm-90 J”.
- the high aspect ratio (pc 2) includes Kava Darros, Hydra Plate (above, manufactured by Hyuno), New Clay, Miracleps PG, Eclipse 650 (above, manufactured by Engelno, Inc.), DB plate ( And Kao White (all from Seal), Power Pim NP, and Power Pim DG (all from Rio Power Pim), and Senyuri HC (Hyper-Rigment).
- Capimum NP, Capimum DG and Senyuri HC are preferred. These can be used alone or in combination of two or more.
- the fine clay (pc1) and the high aspect clay (pc2) may be used alone or in combination.
- fine-grained clay pel
- high aspect clay PC2
- fine clay pel
- Pc 2 fine clay and high aspect clay
- the amount of the fine clay (pc 1) and the high aspect clay (pc 2) used is not particularly limited, but on a mass basis, the fine clay (pc 1) Z high aspect clay ( pc 2) is preferably 1Z3 to 5Z1.
- the fine clay (pc 1) Z high aspect clay ( pc 2) is preferably 1Z3 to 5Z1.
- the total amount of the pigment when the total amount of the pigment is 100% by mass, the total amount of fine clay (-pel) and high aspect clay (pc2) is preferably 40% by mass or more. It is more preferably at least 60% by mass.
- copolymer latex contains the pigment, thereby adhering the pigments to each other and further adhering the pigment to the base paper for coating. As a result, plate stains due to picking and piling during printing, and blanket stains can be prevented.
- the physical properties of the copolymer latex are not particularly limited.
- the average particle size of the copolymer particles contained in the copolymer latex is preferably 50 to: L 50 nm, more preferably 60 to 13 Onm. When the average particle size is 5 Onm or more, the particles are stabilized and aggregation is suppressed, and when the average particle size is 15 Onm or less, the strength of the coating film is improved.
- the toluene-insoluble content of the copolymer is preferably 60 to 99% by mass, more preferably 75 to 98% by mass.
- the strength of the coating film is improved. This is because the adhesive strength between the coated base paper and the base is improved as a result.
- the solid content of the copolymer latex is usually 5 to 30% by mass.
- composition of the copolymer latex is not particularly limited, but may be an aliphatic conjugated diene monomer.
- (a) is obtained by copolymerizing an ethylenically unsaturated carboxylic acid monomer (b) and another monomer (d) copolymerizable with the monomer (a) and the monomer (b). It is preferred that it is.
- a copolymer latex obtained by copolymerizing these monomers (a), (b) and (d) surface strength, water resistance, rigidity, and ink drying property This is because print gloss and anti-stick property can be obtained at a high level with good balance, and the surface strength is particularly excellent even with a small amount of use.
- the monomer (d) examples include an aromatic vinyl compound, a cyanide biel compound, an alkyl (meth) acrylate, and an acrylamide as exemplified in the description of the first non-contact type copolymer latex.
- Compounds, N-methylolacrylamide, vinyl acetate and the like can be used.
- the amount of these monomers used is not particularly limited, but when the total of the monomers (a), (b) and (d) is 100% by mass, It is preferable that (a) is 30 to 60% by mass, monomer (b) is 0.1 to 7% by mass, and monomer (d) is 33 to 69.9% by mass. Further, the monomer (a) is 35 to 55% by mass,
- (b) is 0.5 to 5% by mass and monomer (d) is 40 to 64.5% by mass.
- the proportion of the monomer (a) When the proportion of the monomer (a) is in the above range, the viscosity can be easily maintained in a suitable range, and the strength of the coating film can be sufficiently improved.
- the proportion of the monomer (b) When the proportion of the monomer (b) is within the above range, aggregation of the particles constituting the copolymer latex can be effectively suppressed, and the viscosity of the latex and the viscosity can be easily maintained in a suitable range. . It is preferable that the proportion of the monomer (d) is within the above range, since the proportion of each of the monomer (a) and the monomer (b) can be within the above range.
- the method of polymerizing these monomers is not particularly limited, but is directly It is preferable to use emulsion polymerization since a latex can be obtained.
- the specific method of this emulsion polymerization is as described above.
- the content of the copolymer latex in the paper coating composition (the content of the solid component constituting the copolymer latex; the same applies to the following description) is not particularly limited.
- the amount is 0 parts by mass, it is usually 5 to 30 parts by mass, preferably 7 to 30 parts by mass, more preferably 7 to 20 parts by mass.
- the content of the copolymer latex is 5 parts by mass or more, the pigment can be sufficiently adhered to the base paper for coating, and when the content is 30 parts by mass or less, opacity, whiteness, and blank paper Gloss etc. can be effectively improved.
- the present paper coating composition may contain other components in addition to the pigment, the copolymer latex and the wetting agent.
- the viscosity regulators, defoamers, water resistance improvers, pigment dispersants, pH regulators, coloring pigments, fluorescent dyes and the like exemplified above can be used.
- surfactants can be used as an antifoaming agent and a dispersant, but the surfactant used for these has a higher dynamic surface tension than the surfactant used as the wetting agent. The difference is that the effect of the reduction is very small.
- the content of the viscosity modifier in the paper coating composition is not particularly limited, but when the pigment is 100 parts by mass, usually 0.01 to 4 parts by mass, preferably 0.1 to 4 parts by mass.
- the content of the viscosity modifier is 0.01 parts by mass or more, a sufficient viscosity adjusting effect is exhibited, paddling is hardly generated even during high-speed coating, and excessive penetration into the base paper for coating is performed. Can be prevented, and excellent coverage can be easily obtained.
- the amount is less than 4 parts by mass, the effect of adjusting the viscosity is unlikely to be excessive, and it is easy to obtain a stable force during curtain coating, and it is easy to prevent coating defects.
- the content of the antifoaming agent in the paper coating composition is not particularly limited. However, when the total amount of the pigment is 100 parts by mass, it is usually 0.01 to 2 parts by mass, preferably 0.05 part by mass. It is 0.5 parts by mass.
- the content of the pigment dispersant in the paper coating composition is not particularly limited, but when the total amount of the pigment is 100 parts by mass, usually 0.01 to 3 parts by mass, preferably 0.1 to 3 parts by mass. 0 5-1 parts by mass. .
- the content of the water resistance improver in the paper coating composition is not particularly limited, but when the total amount of the pigment is 100 parts by mass, usually 0.01 to 3 parts by mass, preferably 0.1 to 3 parts by mass. 0 5-1 parts by mass.
- the content of the pH regulator in the paper coating composition is not particularly limited, but is usually 0.01 to 2 parts by mass, preferably 0.02 parts by mass when the total amount of the pigment is 100 parts by mass. Use 5 to 1 parts by mass.
- the content of the above-mentioned pigment, copolymer latex and wetting agent constituting the present paper coating composition can be a combination of each. That is, when the paint in the present paper coating composition is 100 parts by mass, the copolymer latex is 5 to 30 parts by mass and the wetting agent is 0.01 to 2 parts by mass. preferable. It is more preferable that the copolymer latex be 5 to 25 parts by mass and the wetting agent be 0.01 to 1.5 parts by mass. Furthermore, it is particularly preferable that the copolymer latex is 5 to 20 parts by mass and the wetting agent is 0.02 to 1 part by mass.
- the pigment in the paper coating composition may be any suitable viscosity modifier.
- the pigment in the paper coating composition may be any suitable viscosity modifier.
- the copolymer latex is 5 to 30 parts by mass, the wetting agent is 0.01 to 2 parts by mass, and the viscosity modifier is 0.01 to 4 parts by mass. More preferably, the copolymer latex is 5 to 25 parts by mass, the wetting agent is 0.01 to 1.5 parts by mass, and the viscosity modifier is 0.01 to 3.5 parts by mass. Further, it is particularly preferable that the copolymer latex is 5 to 20 parts by mass, the wetting agent is 0.02 to 1 part by mass, and the viscosity modifier is 0.01 to 3 parts by mass.
- the total components of the present paper coating composition are 100% by mass
- the total of these pigments, copolymer latex and wetting agent is usually 95.5% by mass or more. That is, the total of other components (viscosity modifier, medium contained in the copolymer latex, etc.) excluding the pigment, the copolymer latex and the wetting agent is preferably 4.5% by mass or less. .
- a non-contact type paper coating composition containing the first and second non-contact type coating copolymer latexes, or a non-contact type coating method using the non-contact type paper coating composition can be manufactured.
- the first method for producing coated paper of the present invention comprises: a coating step of coating the surface of the coated base paper at a coating speed of 600 to 280 OmZ; and a drying step of drying the coating film. , Are provided.
- the type of pulp forming the coated base paper is not particularly limited, and for example, mechanical pulp, chemical pulp, waste paper pulp (DIP) and the like can be used.
- the coated base paper also contains fillers and internal additives such as pigments such as calcium carbonate, clay and talc, alkyl ketene dimer, rosin acid stones, sizing agents such as sulfate bands, cationic starch, polyacrylamide, etc.
- a paper strength enhancer, a bulking agent and the like may be used.
- a surface sizing agent such as starch, acrylamide, acryl-styrene polymer, etc. is applied to the surface of the coated base paper using a size press, a gate opening and closing, a meter size pressing, or the like. You may.
- the “coating step” is a step preferably performed using curtain coating.
- the coating conditions in this curtain coating are not particularly limited, except that the coating speed is from 600 to 280 Om / min.
- the above “coating speed” indicates the speed at which the surface to be coated advances when the composition for paper coating is applied to the surface to be coated (usually a coating base paper).
- the coating speed is not particularly limited as long as the coating can be performed without causing coating defects, but a higher coating speed is preferable because the productivity is better.
- the non-contact type paper coating composition has a viscosity and a dynamic surface tension value in a predetermined range (2), so that the coating speed is set to 600 to 280 OmZ minutes.
- the coating speed is 60 OmZ minutes or more, a particularly good strength film can be formed, and coated paper of excellent quality can be obtained.
- the coating speed is 280 OmZ minutes or less, coating can be performed without causing paddling. Further, even when the solid content concentration of the coating liquid is as high as 50 to 70% by mass, the above-mentioned coating speed can be reached.
- drying step may be performed by any method. It can be a method and condition of knowledge.
- the first method for producing coated paper of the present invention can include other steps in addition to the above-described coating step and drying step.
- Other processes include a calendaring process that performs a calendar process to adjust the surface smoothness, a pigment coating process that also controls the smoothness of the surface of the cocoon, and a surface that controls surface strength and water absorption.
- a sizing step and the like can be mentioned.
- the calendering step can be applied to both the coated base paper, the paper after the coating step and the drying step, and the coated base paper and the paper after the coating and drying steps.
- Examples of the apparatus used for the calendar processing include a super calendar, a machine calendar, and a soft ep calendar. These may be used alone or in combination of two or more.
- the pigment coating step can be performed on a coated base paper.
- the apparatus used for pigment coating include a size press, a gate press, a metered size press, a blade co., A rod co., And the like.
- the surface sizing process described above can be performed on coated base paper. Apparatuses used in the surface sizing process include a gate opening, a ruco and a night, a size press, and a meter-size presco aa.
- the coated paper obtained by the above manufacturing method comprises a coated base paper and a coating layer, and the coating layer is formed on at least one surface of the coated base paper, using the non-contact type paper coating composition. It was formed.
- the coating layer is a layer formed by drying a coating film formed on the surface of a coating base paper.
- the thickness of this layer is not particularly limited, but is usually 2 to 30 m.
- the coated paper can be subjected to a calendering treatment so that the properties of the coated layer can be fully utilized.
- a calendering treatment By performing a calendar process, smoothness and glossiness can be sufficiently obtained.
- Examples of the apparatus used for the calendar processing include a super power render, a machine calendar, and a soft nip calender. These may be used alone or in combination of two or more.
- the coated paper obtained by the above manufacturing method has no coating defects, and is excellent in coatability and paper feel.
- the dry pick strength evaluated by the method described in the examples described later is used.
- the degree and wet topic strength can be 3.5 or more, preferably 3.7 or more, and more preferably 3.9 or more.
- the second method for producing coated paper of the present invention comprises a step of coating a non-contact type paper coating composition containing a pigment on the surface of the coated base paper by a non-contact coating method,
- the coated base paper has a center line average roughness of 3 zm or less in the frequency region of spatial frequency 25 (1 mm) or less and a center line average roughness of the frequency region of spatial frequency 25 (1 / mm) or more. Is 0.2 m or more.
- the coated base paper of the present invention has a center line average roughness in a frequency region of a spatial frequency of 25 (IZmm) or less, and a center line average roughness in a frequency region of a spatial frequency of 25 (1 / mm) or more. Needs to be in a specific range.
- Fig. 1 shows an enlarged schematic cross-sectional view of the coated base paper.
- spatial frequency means that when the coated base paper 1 is cut in the cross-sectional direction and the coated base paper is viewed from the cross-sectional direction, the surface of the coated base paper 1 forms a unit length (1 mm). This is the number of repetitions of the periodic pattern of the curve f (hereinafter referred to as “surface roughness curve f”). This can be measured using a “NewView 200 optical interference type non-contact 3D surface roughness meter” manufactured by Zygo.
- the surface roughness curve f is configured by overlapping curves of arbitrary spatial frequencies.
- the outline of the curve will be described with reference to FIG. 1.
- a curve of an arbitrary spatial frequency a finer curve (for example, f 1 in FIG. 1) constituting the surface roughness curve f of the coated base paper 1 is obtained.
- the surface roughness curve f of the coated base paper 1 is formed by the existence of such a plurality of overlapping curves.
- the “frequency region where the spatial frequency is 25 (1 / mm) or less” is the frequency at which the spatial frequency is 25 (1 / mm) or less when the surface roughness curve f is decomposed for each spatial frequency.
- the above-mentioned “frequency region where the spatial frequency is 25 (1 / mm) or more” means that when this surface roughness curve is decomposed for each spatial frequency, the spatial frequency is 25 (l / mm). mm) or higher.
- This surface roughness curve can be decomposed by high-speed Fourier transform using the analysis software “MetroPro Ver. 7.6.1” attached to the three-dimensional surface roughness meter. it can.
- the above-mentioned “center line average roughness” refers to folding the above surface roughness curve f from the center line c. And the area obtained by the roughness curve f and the center line c divided by the length L is expressed in m. This can be measured using the above-mentioned device or the like.
- the “center line average roughness” will be described in detail with reference to the figure. As shown in FIG.
- the center line average roughness (hereinafter referred to as “Ra l”) in the frequency range of spatial frequency 25 (1 / mm) or less on the surface of the coated base paper is as follows. This is a numerical value that indicates the degree of roughness of the surface roughness curve ⁇ , that is, the index of the large roughness of the coated base paper surface.
- the above al is 3 m or less, preferably 2.5 m or less, more preferably 2.3 m or less, further preferably 2.0 zm or less, more preferably 1. or less, particularly preferably 1.5 m or less.
- R a1 exceeds 3 ⁇ , coating defects on the surface of the coated paper increase when high-speed curtain coating is performed with the high solid content paper coating composition, which is not preferable.
- the lower limit of Ra1 is not particularly limited, but is usually 0.1 m or more, preferably 0.3 m or more, and more preferably 0.5 m or more.
- the surface roughness curve is a degree of roughness of a finer curve (f 1 in FIG. 1) constituting the curve of f, that is, a value that is an index of the fine roughness of the coated base paper surface.
- Ra2 is 0.2 m or more, preferably 0.3 im or more, more preferably 0.4 mm or more, more preferably 0.5 m or more, particularly preferably
- the composition of the paper coating composition and the base paper become less compatible with each other, and the paddling phenomenon (wetting property) during curtain coating, especially during high-speed coating.
- the upper limit of R and a2 is not particularly limited, but is usually 4. or less, preferably 370 m or less, more preferably 2.5 m or less, and more preferably 2.0 m or less.
- the method of adjusting Ra 1 and Ra 2 is not particularly limited, and can be adjusted to the range described by adjusting the smoothness by a known process.
- the above-mentioned coated base paper is subjected to a calendar process such as a super calender, a machine calender, a soft nip calendar, etc., and by controlling the smoothness, the Ra 1 and Ra 2 can be adjusted to a desired range. it can.
- Pigment coating is applied to the above coated base paper using a size press, gate roll co., Metered size press, blade co., Rod blade co.
- Ra 1 and Ra 2 can be adjusted to a desired range.
- Ral and Ra2 can be determined by, for example, performing a fast Fourier transform using the three-dimensional surface roughness meter and analysis software “MetroPro Ver. 7.6.1” or the like. it can.
- the paper coating composition suitable for the second method for producing coated paper of the present invention is a composition applied to the surface of the coated base paper by a non-contact type coating method, preferably by force coating. It is a thing.
- the paper coating composition generally contains a pigment, and may contain components such as a copolymer latex and a wetting agent, if necessary.
- the above-mentioned non-contact paper coating composition can also be suitably used.
- the pigment is a main component for coating the base paper for coating, and there is no limitation on the type of the pigment as long as it can be coated.
- the pigment the pigments exemplified in the description of the non-contact type paper coating composition can be used.
- the pigment in the paper coating composition include the fine clay (pel) and the high aspect ratio.
- a combination of clay (pc 2) and other pigments is preferred.
- the fine clay (pe l) and the high aspect clay (pc 2) those exemplified in the non-contact type paper coating composition can be used.
- the other pigments the inorganic pigments and / or organic pigments exemplified above can be used.
- the amount of other pigment used is preferably 60% by mass or less (may be 0% by mass), and particularly preferably 40% by mass or less, when the total amount of the pigment is 100% by mass. .
- the mixing ratio of the fine clay (pel) and the high aspect clay (pc2) can be set in a suitable range, thereby suppressing coating defects.
- Pigment-coated paper having an excellent balance between the improvement of the coating property and the coatability can be obtained.
- the composition for paper coating may further contain a copolymer latex in addition to the pigment.
- a copolymer latex By containing the copolymer latex, the pigments can be adhered to each other, the pigments can be adhered to the coated base paper, and the printing plate picking, printing plate stains and blanket stains can be prevented.
- the physical properties of the copolymer latex are not particularly limited.
- the average particle size of the polymer particles contained in the copolymer latex is preferably 50 to: L 50 nm, and more preferably 60 to 130 nm. When the average diameter is 50 nm or more, the diameter can be stabilized and aggregation can be suppressed, and when the average diameter is 15 Onm or less, the strength of the coating film can be improved.
- the toluene-insoluble content of the copolymer is preferably 60 to 99% by mass, and more preferably 75 to 98% by mass.
- the strength of the coating film can be improved, and when the toluene-insoluble content is 99% by mass or less, the film forming property can be improved.
- the adhesive strength between the coating and the coating film can be improved.
- the constitution of the copolymer latex is not particularly limited, but may be obtained by selecting various polymerizable monomers and conducting polymerization.
- the copolymer latex is preferably a copolymer of an aliphatic conjugated diene monomer (a), an ethylenically unsaturated carboxylic acid monomer (b), and the above (a) and (b).
- Other polymerizable monomers (d) Copolymer latex obtained by emulsion polymerization of monomer It is a box.
- the aliphatic conjugated monomer (a) and the ethylenically unsaturated carboxylic acid monomer (b) those exemplified in the description of the first non-contact type coating copolymer latex are used. be able to.
- the monomer (d) include an aromatic vinyl compound, a cyanide biel compound, an alkyl (meth) acrylate, and an acrylamide as exemplified in the description of the first non-contact type copolymer latex.
- Compounds, N-methylolacrylamide, vinyl acetate and the like can be used.
- the amount of these monomers to be used is not particularly limited. However, when the total of the monomers (a), (b) and (d) is 100% by mass, it is preferably 30 to 60% by mass of the monomer (a), 0.1 to 7% by mass of the monomer (b) and 33 to 69.9% by mass of the monomer (d), and more preferably The amount of the monomer (a) is 35 to 55% by mass, the amount of the monomer (b) is 0.5 to 5% by mass, and the amount of the monomer (c) is 40 to 64.5% by mass. When the amount of the monomer (a) used is within the above range, the color viscosity can be maintained in a suitable range, and the strength of the coating film can be improved.
- the amount of the monomer (b 2) is in the above range, the aggregation of latex particles can be suppressed, and the latex viscosity and the color viscosity can be maintained in suitable ranges. Furthermore, when the amount of the monomer (b 3) is within the above range, the proportion of the monomers (b 1) and (b 2) can be within the above range.
- the above-mentioned method can be used for the emulsion polymerization of the monomer.
- the content of the copolymer latex in the paper coating composition (the content of the solids constituting the copolymer latex) is not particularly limited, and may vary depending on the required properties. Range.
- the content of the above copolymer latex is preferably 5 to 30 parts by mass, more preferably 7 to 20 parts by mass, when the above pigment is 100 parts by mass.
- the content of the copolymer latex is 5 parts by mass or more, the pigment can be sufficiently adhered, and when the content is 30 parts by mass or less, opacity, whiteness, white paper gloss, and the like are improved. be able to.
- the paper coating composition may further contain a wetting agent.
- a wetting agent By containing the wetting agent, the wettability of the paper coating composition on the surface of the coated base paper is improved. And a good coating state can be obtained.
- the wetting agent those exemplified in the description of the non-contact paper coating composition can be used.
- the content of the above-mentioned wetting agent in the above-mentioned paper coating composition is not particularly limited, and can be in various ranges according to the required properties.
- the content of the above wetting agent is usually 0.01 to 2 parts by mass, preferably 0.02 to 1 part by mass, when the above pigment is 100 parts by mass.
- the affinity between the pigment in the paper coating composition and the base paper for coating can be improved, and a paddling phenomenon occurs. Can be suppressed.
- the content of the wetting agent is 2 parts by mass or less, the composition for paper coating is suppressed from sinking into the base paper, and a good coating state can be realized, and the obtained pigment coating can be obtained. Paper strength can be improved.
- the above-described paper coating composition may contain the components exemplified in the description of the non-contact paper coating composition in addition to the pigment, the copolymer latex, and the wetting agent. Its content can also be as described above.
- the solid content concentration of the above-mentioned paper coating composition is not particularly limited, and can be in various ranges depending on the constituent components, types, and properties of the paper coating composition, but is preferably 50 mass. % Or more, more preferably 55% by mass or more, and still more preferably 60% by mass. By setting the solid content concentration to 50% by mass or more, covering of the coating layer is improved, and a pigment-coated paper having excellent surface quality can be efficiently produced.
- the upper limit of the solid content concentration is preferably 70% by mass or less, more preferably 67% by mass or less. By setting the content in such a range, it is possible to suppress an increase in color viscosity and to stabilize the obtained curtain film.
- the composition for paper coating is coated on the surface of the base paper for coating by a non-contact type coating method, preferably a force coating method. .
- This coating may be performed on only one side or both sides of the coated base paper.
- the coating base paper can be immediately coated by the curtain coating method without providing an undercoat coating layer before the coating, but if necessary, other coating may be performed. Pre-processing may be performed.
- the apparatus used for the above-mentioned force-coating and the coating can be performed using a known force-coating apparatus.
- the conditions for the curtain coating are not particularly limited, and can be performed after setting various conditions as necessary.
- the coating speed of the curtain coating is usually 600 to 300 mZ, preferably 600 to 280 OmZ, more preferably 800 to 25 mZ.
- the amount is preferably 0 0 mZ, more preferably 100 to 250 Om / min, and particularly preferably 110 to 230 mZ.
- the above coating speed is 600 mZ min or more, it is possible to suppress the occurrence of curtain breakage by reaching an appropriate amount of curtain flow, and when it is set to 280 mZ min or less, frequent occurrence of paddling phenomenon is suppressed. be able to.
- the coating amount can also be appropriately adjusted according to the properties of the pigment-coated paper to be obtained, the physical properties of the paper coating composition to be used, and the like.
- the coating amount (dry mass basis) on one side of the coating base paper is usually 0.1 to 50 g / m 2 , preferably 1 to 30 g / m 2 , more preferably 3 to 25 g / m 2 . is there.
- a pigment-coated paper By drying after the above-mentioned coating, a pigment-coated paper can be obtained.
- the obtained pigment coated paper may be further subjected to a calendar treatment such as a super calendar, a machine calendar, a soft ep calendar, etc. to control the smoothness.
- the coated paper (pigment coated paper) of the present invention is obtained by the method for producing a coated paper described above.
- the coated paper of the present invention may have a coating layer on only one side, or may have a coating layer on both sides.
- the coated paper of the present invention, having such a configuration has almost no unevenness in blank surface appearance, uneven printing, and the like, and is excellent in blank gloss and print gloss.
- the glossiness of white paper evaluated by the method described in Examples described later can be 60 or more, preferably 63 or more.
- the printing gloss evaluated by the method described in Examples described later can be 75 or more, preferably 77 or more.
- the opacity evaluated by the method described in Examples described later can be 87 or more, preferably 90 or more.
- the whiteness evaluated by the method described in Examples described later can be 80 or more, preferably 82 or more.
- the dry pick strength and the ectopic strength evaluated by the method described in Examples described later can be 3.5 or more, preferably 3.9 or more, and more preferably 4.2 or more.
- the average particle diameter of the polymer particles was determined by a conventional method using a submicron analyzer “Model N4” manufactured by Coulter, Inc.
- the copolymer latex was adjusted to pH 8.0 with sodium hydroxide, it was coagulated with isopropanol, and the coagulated product was washed with distilled water and dried. Thereafter, a predetermined amount (about 0.03 g) of the sample was immersed in a predetermined amount (100 ml) of toluene at 25 ° C. for 20 hours. Next, this solution was filtered through a 120-mesh wire gauze, and the mass of the remaining solid content was measured to determine the ratio (%) to the total solid content at the time of preparation (before treatment).
- the obtained copolymer latex was heated at 100 and vacuum-dried for 20 hours to produce a film. This dried film was used as a measurement sample, and a differential scanning It measured according to the ASTM method using the calorimeter (DSC).
- copolymer latexes L-2 to L-10 were produced in the same manner as in Example 11-11.
- the final polymerization conversion was 98-99%.
- the obtained latex it evaluated similarly to the above. The results are shown in Tables 1 to 3.
- a-Methylstyrene dimer 0.5 0.5 0.5 1.5 0.5 0.5 0.5 1.5 0.5 0.5 t-dodecyl mercaptan 0.2 0.3 0.2 0.7 0.2 0.3 0.2 0.7 0.2 0.3 0.2 0.7 0.1 0.7 0.3 1.1
- Example g 9 Example g 10 Comparative example 1-1 Comparative example 1-2 Copolymer latex L--9 L-10 L-11 L-12 Polymerization stage 2 stage 3 stage Total 1 stage 2 stage 3 stage Total 1 2-stage total 1-stage 2-stage total
- a paper coating composition CP-1 CP-15 for curtain coating and offset printing paper was prepared.
- Dispersant polyacrylic acid-based dispersant, trade name "Aron T-1 40", manufactured by Toagosei Co., Ltd.
- the paper coating composition CP-1 was coated on a coating base paper (64 g / m 2 ) so that the coating amount would be 10 0, 0.5 ⁇ 0.5 g Zm 2 on one side, and the SMT Lab Curtain Co.
- the coated paper was coated at a coating speed of 30 m / min and dried with a hot air drier at 150 ° C for 20 seconds to obtain a coated paper (A1).
- the coated paper (A1) was left in a thermo-hygrostat at a temperature of 23 ° C and a humidity of 50% for 24 hours.
- the degree of picking when printed with an RI printing machine was visually evaluated and evaluated on a scale of 1 to 5. The lower the picking phenomenon, the higher the score. The numerical values are shown as the average of six measurements.
- the coated paper surface was moistened with a water-absorbing roll, and then the degree of picking when printing with the RI printing machine was visually judged and evaluated on a scale of 1 to 5. The lower the picking phenomenon, the higher the score. Numerical values are shown as the average of six measurements
- the glossiness was measured at a 60-degree angle using a Murakami gloss meter.
- the coated paper was faded based on JAPAN TAPP I No. 21, and the YI value of the coated paper before the test and the YI value after the test were measured by SM Color Computer, manufactured by Suga Test Instruments Co., Ltd. (5) Operability
- the coating solution composed of the paper coating composition was circulated for 1 hour through the head of the lab curtain coater. During the circulation, “X” indicates that the slit is closed, and “ ⁇ ” indicates that the flow from the slit is not disturbed. " ⁇ "
- the above-mentioned paper coating composition CP-1 is diluted so as to have a viscosity of 100 mPas, and the coating amount becomes 10.0 ⁇ 0.SgZms on one side of the coating base paper. Spray coated as described. Then, it was dried with a hot air drier at 150 ° C for 20 seconds in the same manner as in the case of Curtainco to obtain coated paper (A2).
- the coated paper (A2) was left in a thermo-hygrostat at a temperature of 23 ° C and a humidity of 50% for a day and a night. Super force render treatment was performed four times under the conditions of kg / cm and roll temperature of 50 ° C to obtain coated paper for offset printing. The obtained coated paper for offset printing was evaluated in the same manner as above. The results are shown in Table 6.
- Comparative Example 11 The copolymer latex L-l1 produced in Example 1 was used when the amount of the vinyl cyanide compound used was less than 5 parts by mass, and the paper coating obtained using this L-11 was used. The application of the coating composition CP-11 caused excessive ink absorption in the coating layer of the coated paper. As a result, the print gloss is clearly low, which is not preferable (see Table 7). Further, the copolymer latexes L-12 and L-13 produced in Comparative Examples 1-2 and 1-3 were obtained when the amount of the cyanidani vinyl compound used was 40 parts by mass or more. When the paper coating compositions CP-12 and CP-13 obtained using L-13 and L-13 were applied, the coated paper had an extremely low water resistance and a significant decrease in whiteness. As a result, the results are inferior in fading, which is not preferable.
- the average particle diameter was larger than 150 nm, and the high-speed fluidity was not excellent, so that good operability was obtained. Did not. In addition, excessive ink absorption into the coating layer of the coated paper occurred, and the printing gloss was not good.
- the copolymer latexes L1 to L10 produced in Example 1-1-1-10 shown in Tables 1 to 3 sufficiently achieve the object of the present invention. That is, since the latex is excellent in high-speed fluidity, as shown in Tables 6 to 7, the operability using the paper coating compositions CP-1 to CP-10 obtained using each latex is also good. This indicates that coated paper excellent in dry pick strength, wet topic strength, and print gloss was obtained. Table 6
- the polymerization was continued at 60 while the second stage components (monomer components forming the copolymer part [P2]) shown in Table 8 were continuously added over 7 hours. After completion of the continuous addition, the mixture was further reacted at 70 ° C. for 6 hours (second stage polymerization) to obtain a latex L-116 containing particles made of a copolymer. The final polymerization conversion was 99%. With respect to the obtained latex L-16, the average particle size of the polymer particles, the glass transition point, the toluene insoluble content, the weight average molecular weight of the copolymer part [P 1], and the tackiness were determined by the following methods. Table 8 shows the results.
- the average particle size of the polymer particles was determined by a conventional method using a submicron analyzer “Model N4” manufactured by Cole Yuichi Co., Ltd.
- the polymerization of the copolymer part [P 1] was started using the first-stage component, and when the polymerization conversion reached 70%, N, N-getylhydroxylamine was obtained. The polymerization was stopped by adding 0.1 part. Thereafter, unreacted monomers were removed by steam stripping. Then, the temperature was lowered to room temperature by cooling, and the solid content was adjusted to 25% using distilled water. Thereafter, the produced copolymer part [P 1] was coagulated with isopropanol. After washing and drying the solidified product, 0.3 g was dissolved in 50 ml of tetrahydrofuran (THF). This solution was filtered through a membrane filter, and the filtrate was subjected to gel permeation chromatography (GPC) to determine the molecular weight in terms of polystyrene.
- GPC gel permeation chromatography
- No. 18 copolymer latex was coated on polyethylene terephthalate film. Apply by rod, 120. 30 seconds in C, and dried to form a coating of l OgZm 2. Then, this film and Kurosa paper were combined and pressed by a bench super calender under the conditions of a linear pressure of 200 kgZm and a temperature of 70 ° C. Next, the two were peeled off, and the degree of transfer of the polymer film to the black kraft paper was visually evaluated on a five-point scale. The lower the transcription, the higher the score. The numerical values are shown as the average of six measurements.
- copolymer latexes L117 to L-20 were produced in the same manner as in Example 2-1 and evaluated in the same manner as above.
- the final polymerization conversion was 98-99.5%.
- the results are also shown in Table 8.
- copolymer latexes -21 to -24 were produced in the same manner as in Example 2-1 above, and evaluated in the same manner as above. The final polymerization conversion was 98-99%. The results are shown in Table 9. 2-2.
- Copolymer Latex Otsuichi 16-1 ⁇ -24 produced in Examples 2-1 to 2-5 and Comparative Examples 2-1 to 2-4, Using the kaolin clay, calcium carbonate, dispersant, sodium hydroxide and starch used in the above Example [I], paper coating for offset printing paper for curtain coating according to the formulation in Table 5 above.
- Working compositions CP-16 to CP_24 were prepared.
- Example 2-1 'Example 2-2
- Example 2-3 Example 2-4
- Example 2-5 Copolymer Latex L-16L-17L-18' L-19L-20 Polymerization Stage 1 1-stage 2-stage Total 1-stage 2-stage 1-stage 2-stage Total 1-stage
- Comparative Example 2--1 Comparative Example 2-2 'Comparative Example 2-3 Comparative Example 2-4 Copolymer Latex. L-21 L-22 L-23. L-24 Polymerization Stage 1 Stage 2 Stage Total 1 Stage 2 Step Total 1 Step 2 Step Total 1 Step 2 Step Total
- t-Dodecyl mercaptan 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 'Average particle size (Y) 125 120 120 120 Glass transition temperature (° c)-18 -10 0
- the paper coating composition CP-16 was placed on the base paper for coating described in Example [I] above so that the amount of coating was 10.0 ⁇ 0.5 g / m 2 on one side, and the lab force was adjusted to 10%. Coating was carried out overnight, followed by drying with a hot air drier at 150 ° C for 20 seconds to obtain coated paper (B1). Thereafter, the coated paper (B1) was left in a thermo-hygrostat at a temperature of 23 ° C. and a humidity of 50% for a day and a night. Next, under a condition of a linear pressure of 100 kg / cm and a roll temperature of 50 ° C., a super-calender process was performed four times to obtain a coated paper for offset printing. The obtained coated paper for offset printing was evaluated for dry pick strength, wet topic strength, print gloss, and operability during production by the method described in Example [I] above. Table 10 shows the results.
- the above-mentioned paper coating composition CP-16 was diluted so that the viscosity became 10 OmPas, and the coating amount on one side of the coating base paper was 10.0 ⁇ 0.5 gZm 2. It was applied by spraying so that Thereafter, a coated paper (B2) was obtained by the method described in Example [I] above. Next, the coated paper (B2) was treated in the same manner as in the case of using the curtain curtain, to obtain a coated paper for offset printing.
- the obtained coated paper for offset printing was evaluated in the same manner as above. However, regarding the operability, it was observed whether nozzle clogging does not occur during spraying and whether spraying can be performed normally. Table 10 also shows the evaluation results.
- coated papers were produced in the same manner as in Examples 2 to 6, and evaluated in the same manner as above.
- Examples 2-7 and 2-9, Comparative Examples 2-1 and Comparative Examples 2-3 were also evaluated by blade coating.
- Blade coating was performed at a coating speed of 30 m / min using a lab sheet-fed coating machine. Drying and subsequent treatments are the same as for curtain coating.
- the operability was evaluated based on the stain on the backing roll.
- the evaluation of dirt on the backing mouth was determined by comparing the adhesiveness of the latex with and without latex in blade coating in the past from the evaluation of adhesiveness described above. “X” indicates that dirt is estimated to occur, and “ ⁇ ” indicates dirt is assumed not to occur. , And the middle one was marked with “ ⁇ ”.
- the evaluation results are also shown in Table 10.
- the coatability of the coated paper for offset printing obtained by Curtain Co. and Blade Co. was evaluated by the know-out method.
- the evaluation method is as follows. That is, ammonium chloride was dissolved in a medium in which isopropyl alcohol and water were mixed at a ratio of 1: 1 to prepare an aqueous solution having a concentration of 2.5%. This aqueous solution was sprayed on the surface of the coated paper, placed in a gear-oven, left at 200 ° C. for 10 minutes, and the whiteness was measured. A sample with high whiteness and good coverage was marked with “ ⁇ ”, a sample with low brightness and poor coverage was marked with “X”, and an intermediate one was marked with “ ⁇ ”.
- Examples 2-6 to 2-10 are paper coating compositions containing the copolymer latex L1-16 to L-20 produced in Example 2-1-2-5.
- Coated paper with high coatability, high dry pick strength, wet topical strength, and print glossiness are produced by using the products CP 16 to CP—20 by force coating and spray coating.
- a coated paper having good properties and low latex tackiness was obtained. Also, the operability during manufacturing was good. In the production by blade coating, as is clear from Examples 2-7 and 2-9, even if the above-mentioned paper coating composition is used, the coating property is not sufficient.
- the average particle size was determined by a conventional method using a laser light scattering particle size analyzer “LPA-3100 PAR-3” manufactured by Otsuka Electronics Co., Ltd.
- the glass transition point was determined by a conventional method using a differential scanning thermal analyzer (DSC) “EXTAR6000” manufactured by Seiko Iden Kogyo.
- copolymer latex L-26 to L-29 were produced in the same manner as in Production Example 3-1.
- the final polymerization conversion of each latex was 98%.
- the obtained latex it evaluated similarly to the above. The results are shown in Table 1.1 and Table 12.
- Fine clay (pe l); trade name "Amazon SD", manufactured by Kadam Brazil . Contains about 90% or more of components with a particle size of less than 2 m.
- High aspect clay (pc 2); trade name "Centiyuri HCJ, manufactured by Parapigment Co., Brazil. It contains about 90% of components with a particle size of less than 2 m.
- Viscosity modifier (thickener); trade name "SN980", manufactured by San Nopco.
- the viscosity, dynamic surface tension and static surface tension of the paper coating composition CP-25 were determined by the following methods. The results are shown in Table 13.
- the temperature of the paper coating composition was adjusted for 2 hours in a water bath adjusted to 25 ° C, and after confirming that the temperature was sufficiently constant, a viscometer manufactured by TOKIMEC INC (trade name “Digital The apparent viscosity at 60 rotations was measured 1 minute from the start of the measurement using a VISCOM rice overnight DV M-BII type).
- the molecular weight regulator 2 The molecular weight regulator 2
- each coated paper (C) was left in a thermo-hygrostat at a temperature of 23 and a humidity of 50% for 24 hours.
- one super calendar treatment was performed four times under the conditions of a linear pressure of 100 ⁇ 111 / roll 111 and a roll temperature of 5 Ot.
- the following coating defect, dry pick strength, wet topic strength, blank gloss and print gloss were evaluated. The results are shown in Tables 13 and 14.
- Each coated paper was treated with a 5% aqueous ammonium chloride solution and isopropanol at 50: 5.
- the fibers were immersed in a mixed solution mixed at a ratio of 0 and heated at 200 ° C. for 3 minutes to color the fibers.
- One spot on the surface of each colored coated paper was randomly selected, and this portion was observed at a magnification of 50 times with an optical microscope.
- the coating defects detected in each visual field were evaluated according to the following criteria of “ ⁇ ”, “ ⁇ ” and “X”.
- each coated paper was moistened with the first round (moulton roll) of a RI-I printing machine manufactured by Akira Seisakusho, which was wrapped with a cloth moistened with water. Printing was performed under the same conditions as in (e) above using the second roll with. Thereafter, the degree of picking was evaluated based on the same criteria as in (e) above. The measurement was performed six times on each coated paper. The average value of the evaluation values after each printing was calculated.
- the gloss of the surface of the unprinted coated paper was measured using a Murakami gloss meter at an incident angle of 75 degrees and a reflection angle of 75 degrees. The measurement was performed six times, and the average value was calculated from the obtained glossiness. The larger the value of gloss, the better.
- the compositions for the paper coatings of Comparative Examples 3-1 and 3-2 show that the amount of the viscosity modifier (D) added in order to increase the viscosity was Except that it is more than 3-1 the blending components and the total amount are the same as in Example 3-1.
- the viscosity of the paper coating composition of Comparative Example 3-1 was 220 OmPas, and the viscosity of the paper coating composition of Comparative Example 3-2 was 1600 mPa's. Also exceeds 150 OmPa-s. For this reason, in Comparative Example 3-1, the coating speed was 200m.
- Example 3-1 If it exceeds 1 minute, paddling occurs, and in Comparative Example 3-2, paddling occurs when it exceeds 1400 mZ.
- Coating papers obtained at the highest coating speed were also found to have coating defects, with a dry pick strength of 33% to 76% of Example 3-1 and a wet topic strength of 58% of Example 3-1. 77% both inferior I understand.
- the print gloss was relatively good, the blank gloss was inferior to that of Example 3-1 at 79%.
- the composition and amount of the paper coating composition of Comparative Example 3-3 were the same as in Example 3-1 except that the viscosity modifier (D) was not blended to reduce the viscosity. .
- the viscosity of the paper coating composition of Comparative Example 3-3 was 40 mPa ⁇ s, which was less than 50 mPa ⁇ s. Therefore, when the coating speed exceeded 30 O mZ, paddling occurred. There has occurred. Further, the coated paper obtained at the maximum coating speed did not show any coating defects, and the topical strength was relatively good, but the dry pick strength was 22% of Example 3-1. Inferior. In addition, it can be seen that the blank gloss is inferior to 74% of Example 3-1 and the print gloss is inferior to 86% of Example 3-1.
- the composition and amount of the paper coating composition of Comparative Example 3-4 were the same as those of Example 3-1 except that the paper coating composition did not contain the wetting agent (C) to increase the dynamic surface tension. is there .
- the dynamic surface tension of the paper coating composition of Comparative Examples 3-4 was 6 SmNZm, which exceeded 65 mNZm, so paddling occurred when the coating speed exceeded 80 Om / min. .
- the coated paper obtained at the maximum coating speed had good strength and good print gloss, but the white paper gloss was inferior to that of Example 3-1 at 80%. In addition, coating defects were observed.
- the composition of the paper coating composition of Comparative Example 3-5 was the same as that of the Example except that the wetting agent (C) was excessively blended to reduce the dynamic surface tension.
- the dynamic surface tension of the paper coating composition of Comparative Examples 3-5 was 2 OmNZm, which was less than 25 mNZm. Therefore, when the coating speed exceeded 40 OmZ, paddling occurred. Occurred.
- the coated paper obtained at the maximum coating speed has good dry pick strength, but poor wet topic strength of 70%. Further, the blank gloss is inferior to that of Example 3-1 at 80%, and the print gloss is inferior to Example 3-1 of 89%. In addition, coating defects were observed.
- Example 3-1 had a viscosity and a dynamic surface tension value within the range of the present invention, so that the solid content concentration was low. Even when the concentration was as high as 60%, coating could be performed at a high speed of 210 OmZ without paddling. In addition, coated paper obtained at the maximum coating speed No spots were observed, and the dry pick strength was 4.6, the wet topic strength was 4.3, the white paper gloss was 63, and the print gloss was 77.6, all of which were excellent values.
- Example 3-2 high-speed coating of 180 OmZ could be performed, and no coating defects were observed in the coated paper obtained at the maximum coating speed, and the dry pick strength was low. Four.
- Example 3-3 high-speed coating at 200 Om / min could be performed, and no coating defects were observed on the coated paper obtained at the maximum coating speed.
- Were 4.0 the strength of the wet topic was 4.8, the gloss of blank paper was 62.8, and the gloss of printing was 79.2, all of which were excellent values.
- Example 3-4 high-speed coating was performed at 180 Om / min. Coating paper obtained at the maximum coating speed showed no coating defects, Is 4.
- Example 3-5 high-speed coating of 210 OmZ was able to be performed, and no coating defects were observed in the coated paper obtained at the maximum coating speed, and the dry pick strength was low. 3.9, wet topic strength of 4.1, blank gloss of 71.2 and print gloss of 83.3 were all excellent values.
- Copolymer latex L-31 to L-34 were produced in the same manner as in Production Example 411 using the raw materials shown in Tables 15 to 16, and evaluated in the same manner as described above. The results are shown in Tables 15 and 16.
- coated base paper base paper Nos. 1 to 5 which are commercially available uncoated papers and base papers No. 6 to 10 which are commercially available coated papers were prepared.
- the surface smoothness was measured using a light interference type non-contact three-dimensional surface roughness meter “NewView 200” manufactured by Zygo, and the spatial frequency was 25 (1 / mm) or less.
- the center line average roughness Ra1 in the frequency domain and the center line average roughness Ra2 in the frequency domain of a spatial frequency of 25 (1 mm) or more were determined.
- the measurement conditions were as follows: objective lens: 2.5x, irradiation lens: 2x, measurement area: 1.45mmX l. 08mm, integration count: 3 times.
- Ra 1 and Ra 2 were obtained by performing a high-speed Fourier transform using an analysis software (MetroPro Ver. 7.6.1) attached to the above apparatus.
- 10 different points were measured under the above measurement conditions and analyzed, and Ra1 and Ra2 were calculated as the average values, respectively. Table 18 shows the results.
- the above paper coating composition CP-35 to CP-44 was prepared to the solid content concentration shown in Table 18, and was applied to the above-mentioned base paper Nos. 1 to 10 using a pilot curtain. Pigment coated paper (D) was obtained. At that time, the coating speed was gradually increased in increments of 20 OmZmin, and the maximum speed at which paddling did not occur was defined as the “maximum coating speed (mZ)”. The results are shown in Table 18.
- the pigment-coated paper (D) obtained at the above-mentioned maximum coating speed was left in a thermo-hygrostat at a temperature of 23 ° C and a humidity of 50% for 24 hours.
- a super calendar treatment was performed four times under the conditions of a linear pressure of lO OkgZcmu and a mouth temperature of 50 ° C.
- the obtained coating paper was evaluated for the following coating defects, dry pick strength, wet topic strength, white paper gloss, print gloss, opacity and whiteness. The results are shown in Table 18.
- Each pigment coated paper is immersed in a 2% aqueous ammonium chloride solution by the burnt method, The fiber colored by heating at 200 ° C. for 3 minutes was observed with an optical microscope at 50 ⁇ , and the state of coating defects was observed.
- ⁇ means that there was no coating defect
- X means that there was a coating defect.
- the evaluation was made by Hunter colorimetry measured with a blue filter using a whiteness meter. The larger the value, the better.
- coated paper obtained is offset printing paper such as high-speed offset printing paper, gravure printing paper, letterpress printing paper, inkjet paper, electrophotographic paper, art book paper, magazine cover paper, book front-end paper, and boss paper. It can be used for evening paper, catalog paper, calendar paper, brochure paper, magazine text paper, magazine color page paper, flyer paper, postcard paper, card paper, etc.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/540,543 US20060251819A1 (en) | 2002-12-25 | 2003-12-22 | Copolymer latex for non-contact coating, composition containing the same, coated paper and process for producing the same |
AU2003292605A AU2003292605A1 (en) | 2002-12-25 | 2003-12-22 | Copolymer latex for noncontact coating and composition comprising the same, and coated paper and method for production thereof |
EP03782871A EP1577438A4 (en) | 2002-12-25 | 2003-12-22 | COPOLYMER LATEX FOR CONTACT-FREE COATING AND HIS COMPOSITION, AND COATED PAPER AND METHOD FOR THE PRODUCTION THEREOF |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002374767A JP4228689B2 (ja) | 2002-12-25 | 2002-12-25 | 塗工紙の製造方法 |
JP2002-374767 | 2002-12-25 | ||
JP2002377666A JP3791494B2 (ja) | 2002-12-26 | 2002-12-26 | 顔料塗工紙の製造方法及び顔料塗工紙 |
JP2002-377666 | 2002-12-26 | ||
JP2003-104039 | 2003-04-08 | ||
JP2003104039A JP2004307667A (ja) | 2003-04-08 | 2003-04-08 | カーテン塗工用またはスプレー塗工用共重合体ラテックスおよびそれを含有する紙塗工用組成物 |
JP2003-107074 | 2003-04-10 | ||
JP2003107074A JP4120448B2 (ja) | 2003-04-10 | 2003-04-10 | 塗工紙の製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004061229A1 true WO2004061229A1 (ja) | 2004-07-22 |
Family
ID=32719348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/016447 WO2004061229A1 (ja) | 2002-12-25 | 2003-12-22 | 非接触型塗工用共重合体ラテックス及びそれを含む組成物並びに塗工紙及びその製造方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060251819A1 (ja) |
EP (1) | EP1577438A4 (ja) |
KR (1) | KR100990793B1 (ja) |
AU (1) | AU2003292605A1 (ja) |
WO (1) | WO2004061229A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2771509A4 (en) * | 2011-10-27 | 2015-08-12 | Basf Se | PAPER COATING COMPOSITIONS COMPRISING A POLYMERIC DISPERSION FROM AMBIENT TEMPERATURE LIQUID AND GASEOUS MONOMERS |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2879225B1 (fr) * | 2004-12-15 | 2007-02-16 | Honnorat Rech S & Services Sar | Papier brillant |
FI117344B (fi) * | 2004-12-31 | 2006-09-15 | M Real Oyj | Päällystetty paperituote sekä menetelmä ja laitteisto sen valmistamiseksi |
FR2911884B1 (fr) * | 2007-01-31 | 2010-02-26 | Arjowiggins Licensing Sas | Feuille couchee blanche imprimable par offset et ayant un haut pouvoir de fluorescence et son procede de fabrication |
FI123126B (fi) * | 2007-04-25 | 2012-11-15 | Upm Kymmene Oyj | Paperi ja menetelmä paperin valmistamiseksi |
EP2279299A1 (en) * | 2008-04-15 | 2011-02-02 | SAPPI Netherlands Services B.V. | Coating formulation for an offset paper and paper coated therewith |
US8835546B2 (en) | 2008-07-18 | 2014-09-16 | United States Gypsum Company | Finishing glaze for decorative texturing medium |
US20130011553A1 (en) * | 2010-03-30 | 2013-01-10 | Nippon Paper Industries Co., Ltd. | Processes for preparing coated printing paper |
EP2692947A4 (en) | 2011-03-29 | 2014-11-19 | Jujo Paper Co Ltd | COATED PAPER FOR PRINTING AND MANUFACTURING METHOD THEREFOR |
US20120309246A1 (en) | 2011-06-03 | 2012-12-06 | Alexander Tseitlin | Curable biopolymer nanoparticle latex binder for mineral, natural organic, or synthetic fiber products and non-woven mats |
KR101577501B1 (ko) * | 2013-03-15 | 2015-12-28 | 주식회사 엘지화학 | 딥 성형용 라텍스 조성물 및 이로부터 제조된 성형품 |
CN105452301B (zh) * | 2013-07-24 | 2018-01-30 | 日本A&L株式会社 | 共聚物胶乳 |
CN105378003B (zh) * | 2013-08-14 | 2019-03-29 | 惠普发展公司,有限责任合伙企业 | 喷墨油墨组 |
JP2016539235A (ja) | 2013-12-05 | 2016-12-15 | エコシンセティックス リミテッド | ホルムアルデヒド非含有バインダーおよび多成分ナノ粒子 |
EP2930266A1 (en) * | 2014-04-09 | 2015-10-14 | Coatex | Paper coating composition comprising void latex particles and calcium carbonate |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0327196A (ja) * | 1989-06-19 | 1991-02-05 | Kanzaki Paper Mfg Co Ltd | 印刷用塗被紙の製造方法 |
JPH05179599A (ja) * | 1991-12-27 | 1993-07-20 | Sumitomo Dow Ltd | 紙塗工用ラテックス |
JPH07119088A (ja) * | 1993-10-21 | 1995-05-09 | Mitsubishi Paper Mills Ltd | 印刷用顔料塗被紙 |
JPH08260390A (ja) * | 1995-03-28 | 1996-10-08 | Nippon Zeon Co Ltd | 紙塗被用ラテックス組成物及び紙塗被用組成物 |
JP2000281732A (ja) * | 1999-03-30 | 2000-10-10 | Nippon Zeon Co Ltd | 防湿性紙用重合体ラテックス、防湿性紙用組成物及びこれを塗被して成る防湿性紙 |
JP2000336594A (ja) * | 1999-05-28 | 2000-12-05 | Nippon Zeon Co Ltd | 防湿性紙塗被用共重合体ラテックス、防湿性紙塗被用組成物及びこれを塗被してなる防湿性塗被紙 |
JP2001064444A (ja) * | 1999-08-25 | 2001-03-13 | Nippon Zeon Co Ltd | 防湿性紙塗被用共重合体ラテックス |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4778711A (en) * | 1986-02-26 | 1988-10-18 | Fuji Xerox Co., Ltd. | Paper for receiving toner images in electrophotography |
KR100278934B1 (ko) * | 1992-01-10 | 2001-01-15 | 고마쓰바라 히로유끼 | 공중합체 라텍스 제조방법 및 그 용도 |
US6572951B2 (en) * | 2000-03-31 | 2003-06-03 | Nippon Paper Industries Co., Ltd. | Printing sheet |
EP1249533A1 (en) * | 2001-04-14 | 2002-10-16 | The Dow Chemical Company | Process for making multilayer coated paper or paperboard |
US7473333B2 (en) * | 2002-04-12 | 2009-01-06 | Dow Global Technologies Inc. | Process for making coated paper or paperboard |
-
2003
- 2003-12-22 KR KR1020057012043A patent/KR100990793B1/ko active IP Right Grant
- 2003-12-22 AU AU2003292605A patent/AU2003292605A1/en not_active Abandoned
- 2003-12-22 WO PCT/JP2003/016447 patent/WO2004061229A1/ja not_active Application Discontinuation
- 2003-12-22 EP EP03782871A patent/EP1577438A4/en not_active Withdrawn
- 2003-12-22 US US10/540,543 patent/US20060251819A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0327196A (ja) * | 1989-06-19 | 1991-02-05 | Kanzaki Paper Mfg Co Ltd | 印刷用塗被紙の製造方法 |
JPH05179599A (ja) * | 1991-12-27 | 1993-07-20 | Sumitomo Dow Ltd | 紙塗工用ラテックス |
JPH07119088A (ja) * | 1993-10-21 | 1995-05-09 | Mitsubishi Paper Mills Ltd | 印刷用顔料塗被紙 |
JPH08260390A (ja) * | 1995-03-28 | 1996-10-08 | Nippon Zeon Co Ltd | 紙塗被用ラテックス組成物及び紙塗被用組成物 |
JP2000281732A (ja) * | 1999-03-30 | 2000-10-10 | Nippon Zeon Co Ltd | 防湿性紙用重合体ラテックス、防湿性紙用組成物及びこれを塗被して成る防湿性紙 |
JP2000336594A (ja) * | 1999-05-28 | 2000-12-05 | Nippon Zeon Co Ltd | 防湿性紙塗被用共重合体ラテックス、防湿性紙塗被用組成物及びこれを塗被してなる防湿性塗被紙 |
JP2001064444A (ja) * | 1999-08-25 | 2001-03-13 | Nippon Zeon Co Ltd | 防湿性紙塗被用共重合体ラテックス |
Non-Patent Citations (1)
Title |
---|
See also references of EP1577438A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2771509A4 (en) * | 2011-10-27 | 2015-08-12 | Basf Se | PAPER COATING COMPOSITIONS COMPRISING A POLYMERIC DISPERSION FROM AMBIENT TEMPERATURE LIQUID AND GASEOUS MONOMERS |
Also Published As
Publication number | Publication date |
---|---|
KR20050088337A (ko) | 2005-09-05 |
AU2003292605A1 (en) | 2004-07-29 |
EP1577438A1 (en) | 2005-09-21 |
US20060251819A1 (en) | 2006-11-09 |
KR100990793B1 (ko) | 2010-10-29 |
EP1577438A4 (en) | 2006-09-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2004061229A1 (ja) | 非接触型塗工用共重合体ラテックス及びそれを含む組成物並びに塗工紙及びその製造方法 | |
KR940003956B1 (ko) | 유심다층구조 에멀션 입자 | |
JP3791494B2 (ja) | 顔料塗工紙の製造方法及び顔料塗工紙 | |
JP4120448B2 (ja) | 塗工紙の製造方法 | |
CN100392181C (zh) | 非接触型涂布用共聚物胶乳及含有该胶乳的组合物与涂布纸及其制造方法 | |
JP2006152484A (ja) | 艶消し塗工紙用組成物及び艶消し塗工紙 | |
KR20050005486A (ko) | 잉크젯 기록용지 | |
JP2009243004A (ja) | 紙塗工用共重合体ラテックス | |
JP2006283223A (ja) | コート白ボールの製造方法及びコート白ボール | |
JP2005264398A (ja) | 塗工紙の製造方法及び塗工紙 | |
JPH10204218A (ja) | 共重合体ラテックスおよび紙塗工用組成物 | |
JP2005314834A (ja) | 塗工紙の製造方法及び塗工用組成物 | |
JP2006206757A (ja) | 共重合体ラテックス及びその製造方法並びに紙塗工用組成物 | |
JP3201582B2 (ja) | インクジェット記録材料用の表面塗工剤 | |
JP2004124312A (ja) | 紙塗工用共重合体ラテックスおよび紙塗工用組成物 | |
JPH05247890A (ja) | 印刷用顔料塗被紙及びその製造方法 | |
JP4806931B2 (ja) | 共重合体ラテックス及びその製造方法並びに紙塗工用組成物 | |
JPS6155290A (ja) | グラビア印刷紙用塗被組成物 | |
JPS6312647A (ja) | 紙塗工用組成物 | |
JPH1150394A (ja) | 紙塗工組成物用共重合体ラテックス | |
JPS6366397A (ja) | グラビア印刷紙塗被用組成物 | |
JPS638439A (ja) | 紙塗工用組成物 | |
JP2004307667A (ja) | カーテン塗工用またはスプレー塗工用共重合体ラテックスおよびそれを含有する紙塗工用組成物 | |
JPH08325994A (ja) | 共重合体ラテックスおよびこれを含有してなる塗被紙用組成物 | |
JP2628305B2 (ja) | 塗工板紙用組成物 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2003782871 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2006251819 Country of ref document: US Ref document number: 1020057012043 Country of ref document: KR Ref document number: 20038A75541 Country of ref document: CN Ref document number: 10540543 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 1020057012043 Country of ref document: KR |
|
WWP | Wipo information: published in national office |
Ref document number: 2003782871 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 10540543 Country of ref document: US |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 2003782871 Country of ref document: EP |