Abstract: A block copolymer is provided. The block copolymer according to an exemplary embodiment includes a first block represented by Chemical Formula 1 and a second block represented by Chemical Formula 2: wherein COM1 and COM2 are independently selected from a polystyrene moiety, polymethylmethacrylate moiety, polyethylene oxide moiety, polyvinylpyridine moiety, polydimethylsiloxane moiety, polyferrocenyldimethylsilane moiety, and polyisoprene moiety, R1 is hydrogen or an alkyl group with 1 to 10 carbon atoms, Ph is a phenyl group, a is 1 to 50, R2 is hydrogen or an alkyl group with 1 to 10 carbon atoms, and b is 1 to 50.

Abstract: The present invention relates to a method for producing at least one resin, which comprises mixing at least one polyisocyanate with at least one polyepoxide, the reaction taking place in the presence of a catalyst system based on at least one metal-free Lewis base having at least one nitrogen atom, and also to resins obtainable by a method of the invention, and to the use of a resin obtainable by a method of the invention, or of a resin of the invention, for producing seals, for producing components for rotor blades, boat hulls, or vehicle body parts, or for coatings.

Abstract: The present invention generally relates to alcohol-terminated polyisobutylene (PIB) compounds, and to a process for making such compounds. In one embodiment, the present invention relates to primary alcohol-terminated polyisobutylene compounds, and to a process for making such compounds. In still another embodiment, the present invention relates to polyisobutylene compounds that can be used to synthesize polyurethanes, to polyurethane compounds made via the use of such polyisobutylene compounds, and to processes for making such compounds. In yet another embodiment, the present invention relates to primary alcohol-terminated polyisobutylene compounds having two or more primary alcohol termini and to a process for making such compounds. In yet another embodiment, the present invention relates to primary terminated polyisobutylene compounds having two or more primary termini selected from amine groups or methacrylate groups.

Abstract: The invention relates to a compound prepared by (i) reacting (a) at least one compound selected from diisocyanate, polyisocyanate, or mixture thereof; (b) at least one isocyanate-reactive compound selected from a fluorinated alcohol; a cyclic or acyclic sugar alcohol which is substituted with at least one —R1, —C(O)R1, ?(CH2CH2O)n(CH(CH3)CH2O)mR2, —(CH2CH2O)n(CH(CH3)CH2O)mC(O)R1, or mixtures thereof; or mixtures of a fluorinated alcohol and a substituted cyclic or acyclic sugar alcohol; and (c) at least one isocyanate-reactive ethylenically unsaturated compound; wherein each n is independently 0 to 20; each m is independently 0 to 20; m+n is greater than 0; each R1 is independently a linear or branched alkyl group having 5 to 29 carbons optionally comprising at least 1 unsaturated bond; each R2 is independently —H, or a linear or branched alkyl group having 6 to 30 carbons optionally comprising at least 1 unsaturated bond, or mixtures thereof; and (ii) reacting the reaction product of step (i) with a bisulfat

Abstract: Compositions comprising Silane functionalized compounds are provided. In one embodiment, the silane functionalized compounds include an epoxy resin derived backbone having silane functional groups pendant to the backbone or serving as end caps. The compositions comprising silane functionalized compounds may be utilized in a variety of applications including in coating formulations, adhesive formulations, composite materials, and combinations thereof.

Abstract: To provide an epoxy resin composition that is suitable for producing optical sheets which exhibit excellent transparency, heat resistance, strength, smoothness and light resistance, and a cured product thereof. An epoxy resin composition for optical sheets, the composition comprising a polyvalent carboxylic acid (A) represented by formula (I): (wherein, R1's each independently represent a hydrogen atom, an alkyl group having 1 to 15 carbon atoms, or a carboxyl group; q represents the number of substituent R1's, and represents an integer from 1 to 4; and P represents any one of the following x, y and z): (wherein, there may be a plural number of R2's per ring, and R2's each independently represent a hydrogen atom or a methyl group; and * represents a bonding site linked to the oxygen atom; y.

Abstract: A method for preparing a pitch for carbon fibers and a pitch for carbon fibers prepared by the same are disclosed. The method includes introducing a peroxide compound and ozone into a petroleum-process residual oil, followed by heat treatment for reaction. By the method, the pitch for carbon fibers, which exhibits excellent oxidative stabilization and oxidative incompatibility while having a high softening point and high strength, can be obtained at high yield at a relatively low temperature.

Abstract: Provided is a polymer obtained by homopolymerizing a lactone monomer. The polymer contains a structural unit having a lactone ring containing three or more carbon atoms, wherein at least one of the carbon atoms, except for C of —C(?O)O—, of the lactone ring forms a part of a main chain; and wherein at least one of the carbon atoms, except for C of —C(?O)O—, which forms the lactone ring and is other than the carbon atom(s) forming a part of the main chain is bridged with an atom of the main chain.

Abstract: Provided are a biodegradable polyester resin and an article including the resin. The provided biodegradable polyester resin includes an aliphatic dicarboxylic acid residue including a succinic acid residue and an adipic acid residue; and an aliphatic diol residue including at least one selected from the group consisting of an ethylene glycol residue and a butanediol residue in order to improve biodegradability and flexibility.

Abstract: Novel pentablock polymers having a PCL-PLA-PEG-PLA-PCL or PCL-PGA-PEG-PGA-PCL configuration, wherein PEG is polyethylene glycol, PCL is poly(8-caprolactone), PGA is poly(glycolic acid), and PLA is poly(lactic acid), and methods of making nanoparticles from the pentablock polymers, are disclosed. The invention is also directed to a method for preparing nanoparticle compositions comprised of polymers with high levels of bioactive or diagnostic agents.

Abstract: A method for the continuous production, at high polymerization yield, of an oxymethylene copolymer having improved thermal stability and formaldehyde emission, while maintaining toughness and rigidity, is provided. Provided is a production method for oxymethylene copolymer, including: a step of carrying out a copolymerization reaction of trioxane and 1,3-dioxolane in an amount of 0.9-2.4 mass % with respect to the trioxane, in the presence of 0.001-0.007 mol % of boron trifluoride and 0.006-2.0 mass % of a sterically hindered phenol with respect to the trioxane; and a step of adding a polymerization terminator to the reaction system at the point in time that the polymerization yield of the copolymerization reaction has reached 92% or above, to terminate polymerization.

Abstract: The present invention relates to methods, compositions, and kits for generating conjugated gold nanoparticles. In certain embodiments, the present invention provides methods of generating unsaturated conjugated gold nanoparticles by mixing naked gold nanoparticles with a first type of attachment molecules at a molar ratio such that the attachment molecules attach to the naked gold particles at a density level below the saturation level of the naked gold particles (e.g., at a saturation level of 1-99%). In some embodiments, a second type of attachment molecules (e.g., with the opposite charge as the first type of attachment molecules) are mixed with the unsaturated conjugated gold nanoparticles to generate double-conjugated gold nanoparticles (e.g., that are zwitterionic).

Abstract: A continuous process for the preparation of polyoxazolines comprises mixing monomers, an initiator, and optionally an additive, feeding the mixture into at least one tubular reactor segment with a feed side and an outlet side, and polymerizing the mixture to form the polyoxazolines. A tubular reactor segment comprises a mixer for forming a mixture comprising monomers, an initiator, an additive, a terminating agent, and/or a functionalizing agent, at least first and second tubular reactor segments, and addition devices for the first and second tubular reactor segments.

Abstract: A copolymerized polyamide resin includes a polymer of a monomer mixture comprising a dicarboxylic acid component comprising adipic acid and a dicarboxylic acid represented by Formula 1, wherein each R1 is independently a C1 to C5 alkyl group and a is an integer from 0 to 4, and a diamine component comprising m-xylene diamine and a diamine represented by Formula 2, wherein A is a single bond or a C1 to C10 hydrocarbon group, R2 and R3 are each independently a C1 to C5 alkyl group, and b and c are each independently an integer from 0 to 4, wherein the copolymerized polyamide resin has a difference between a melting temperature (Tm) and a crystallization temperature (Tc) of about 50° C. or more. The copolymerized polyamide resin may have excellent heat resistance and reduced or no gel generation and yellowing phenomenon in a molding process.

Abstract: A polymer including a moiety represented by Chemical Formula 1, an organic layer composition including the polymer, an organic layer manufactured from the organic layer composition, and a method of forming patterns using the organic layer composition are provided. The definitions of the Chemical Formula 1 are the same as defined in the detailed description.

Abstract: A poly(arylether sulfone) polymer [(t-PAES) polymer, herein after], wherein more than 70% moles of the recurring units are recurring units (Rt) of formula (St): -E-Ar1—S02-[Ar2-(T-Ar3)n—SO2]m-Ar4— (formula St) wherein: n and m, equal to or different from each other, are independently zero or an integer of 1 to 5, each of Ar1, Ar2, Ar3 and Ar4 equal to or different from each other and at each occurrence, is an aromatic moiety, T is a bond or a divalent group optionally comprising one or more than one heteroatom; —E is of formula (Et), wherein each of R?, equal to or different from each other, is selected from the group consisting of halogen, alkyl, alkenyl, alkynyl, aryl, ether, thioether, carboxylic acid, ester, amide, imide, alkali or alkaline earth metal sulfonate, alkyl sulfonate, alkali or alkaline earth metal phosphonate, alkyl phosphonate, amine and quaternary ammonium; j? is zero or is an integer from 1 to 4, and said (t-PAES) polymer having a number average molecular weight (Mn) ranging from 41 000 to

Abstract: This invention relates to colloidally-protected, wax-based microstructures and dispersions thereof. More specifically, this invention relates to powders prepared from colloidally-protected, wax-based microstructure dispersions and process of making such powders. This invention also relates to a various end-use compositions comprising such powders from wax-based colloidal dispersions.

Abstract: Provided herein is a process for making a grafted cross-linked polymer blend, by polymerizing a first and second polymer solution (each having 75 to 99 wt % propylene-derived units, 1 to 25 wt % ethylene-derived units, and 0.05 to 6 wt % diene-derived units); combining the first and second polymer solution to produce a polymer blend solution; removing solvent from the polymer blend solution to produce a polymer blend; mixing the polymer blend with a coagent and a vinyl-terminated silane compound; subjecting the polymer blend to electron beam irradiation to grafting the vinyl-terminated silane compound to either or both of the first polymer and the second polymer to form a grafted polymer blend; and moisture curing the grafted polymer blend to form a grafted cross-linked polymer blend, wherein the grafted cross-linked polymer blend is substantially free of peroxide.

Abstract: The present disclosure relates to a process for the preparation of high strength and high modulus polyethylene products/laminates consisting of steps such as providing a pre-dried, at least 50% disentangled ultra-high molecular weight polyethylene (UHMWPE) powder, feeding the UHMWPE powder having temperature ranging from ?15° C. to 50° C., at the nip of at least one pair of heated, polished counter rotating calendaring rollers, rotating at different roller speeds to obtain at least one pre-laminate and hot stretching the pre-laminate(s) at a pre-determined temperature and pre-determined stretching speed to obtain high strength laminates. The laminates provided by the present disclosure have tensile strength ranging between 0.5 GPa and 3.0 GPa and tensile modulus ranging between 40 GPa and 200 GPa.

Abstract: The production of a protein free synthetic polyisoprene which has both low levels of chemical impurities and good physical properties has yet to be realized. It has now been envisioned that the use of neodymium catalyzed polyisoprene will offer the combined advantages of both a clean, as well as, high cis-1,4 polymer. Synthesis of polyisoprene rubber using a neodymium based catalyst system is described. Characterization of the material shows the absence of an ultra high molecular weight fraction and the presence of very high cis-1,4-microstructure. Gum stock and black filled compound studies comparing neodymium polyisoprene with natural rubber, titanium polyisoprene, and lithium polyisoprene have been performed. Results indicate that polyisoprene rubber synthesized using a neodymium catalyst system (Nd—PI) has similar stress-strain and tear properties as synthetic titanium polyisoprene.

Abstract: A composition may include a thermosetting resin containing a plurality of polymer nanoparticles. At least some of the polymer nanoparticles may release either a catalyst or a hardener during a resin curing process. The catalyst or hardener may alter the reaction rate of the resin.

Abstract: Provided is a heat-shrinkable polyester film that suppresses deterioration of the shrinkage finish property associated with a decline in performance during aging and does not loosen even after being used as a label. This heat-shrinkable polyester film comprising a polyester of a predetermined composition fulfills all of the following: (1) a ratio A1/A2 of the absorbancy (A1) at 1340 cm?1 and the absorbancy (A2) at 1.410 cm?1 of the film measured by polarized ATR-FTIR from 0.45 to 0.75 or from 0.40 to less than 0.45 in either the width direction or longitudinal direction of the film; (2) a ratio (shrinkage stress after 30 seconds/maximum shrinkage stress) of the shrinkage stress after 30 seconds when the film is heat shrunk for 30 seconds in 90° C. hot air (shrinkage stress after 30 seconds) and the maximum shrinkage stress of from 75% to 100%; and (3) a hot-water shrinkage in the width direction of from 30% to 55% when, after aging the film for 672 hours in a 30° C.

Abstract: A prepreg satisfies the following properties (A) and (B). (A) The resin flow of the prepreg measured under conditions of 170° C. and 30 kgf/cm2 according to IEC 60249-3-1, 1981, is 0% or more and 5% or less. (B) In a dynamic viscoelasticity test under conditions of a temperature of 30° C. or higher and 200° C. or lower, a temperature rising rate of 3° C./min, and a frequency of 0.5 Hz, a relation of 1?Vb/Va?15 is established, where Va is a minimum melt viscosity of the resin composition collected from the prepreg, and Vb is a melt viscosity of the collected resin composition at a temperature Tb, Tb=Ta+20° C., and Ta is a temperature when the melt viscosity is the minimum melt viscosity Va.

Abstract: Thermoformed polymeric foam articles are described herein In some embodiments, the articles are made by a manufacturing method (e.g., a continuous process) which involves the extrusion and subsequent thermoforming of a blowing agent containing thermoplastic sheet. The thermoformed polymeric foam articles may have a lower density than the precursor sheet from which they are formed. In some but not all embodiments, the precursor sheet is a multi-layer sheet which includes at least one foam layer. In such embodiments, the thermoformed articles also include multiple layers and at least one foam layer.

Abstract: An embodiment of a closed-cell polymeric rigid foam may be made using a one-shot method and a reaction system that includes a hydrofluoroalkene physical blowing agent and a polyol mixture having an aminic polyol. The hydrofluoroalkene blowing agent has 3 to 5 carbon atoms and a boiling point between 10° C. and 40° C. at 1 atmosphere pressure. Embodiments of rigid foams may have high closed cell content and are particularly well suited for thermal insulation.

Abstract: An embodiment of a closed-cell polymeric rigid foam may be made using a one-shot method and a reaction system that includes a hydrofluoroalkene physical blowing agent and a polyol mixture having an aminic polyol. The hydrofluoroalkene blowing agent has 3 to 5 carbon atoms and a boiling point between 10° C. and 40° C. at 1 atmosphere pressure. Embodiments of rigid foams may have high closed cell content and are particularly well suited for thermal insulation.

Abstract: The present invention relates to mixtures of 1,1,1,3,3,3-hexafluorobutene (1336mzzm) and 1-chloro-3,3,3-trifluoropropene (1233zd). The blends are useful as blowing agents for polymer foam, solvents, aerosol propellants and heat transfer media.

Abstract: A blowing agent for thermosetting foams is disclosed. The blowing agent is a hydrofluoroolefin (HCFO), preferably HFCO-1234ze in combination with a hydrochlorofluoroolefin (HCFO) preferably one selected from HCFO-1233zd, HCFO-1223, HCFO-1233xf and mixtures thereof. The blowing agent is effective as a blowing agent in the manufacture of thermosetting foams.

Abstract: The present invention relates to a process for producing porous materials, which comprises providing a mixture comprising a composition (A) comprising components suitable to form an organic gel and a solvent mixture (B), reacting the components in the composition (A) in the presence of the solvent mixture (B) to form a gel and drying of the gel, wherein the solvent mixture (B) is a mixture of at least two solvents and the solvent mixture has a Hansen solubility parameter ?H in the range of 3.0 to 5.0 MPa?1, determined using the parameter ?H of each solvent of the solvent mixture (B). The invention further relates to the porous materials which can be obtained in this way and the use of the porous materials as thermal insulation material and in vacuum insulation panels.

Abstract: A nitrile rubber composition contains a carboxyl group-containing nitrile rubber with an iodine value of 120 or less (A) and bituminous coal (B). The bituminous coal (B) has a carbon purity of preferably 60 to 95 wt % and further has a volume average particle size of preferably 2 to 10 ?m. It is possible to provide a nitrile rubber composition which can give a cross-linked rubber which is excellent in normal physical properties and further is superior in compression set resistance and oil resistance (in particular, oil resistance to lubricating oil and fuel oil).

Abstract: A heat resistant silicone rubber composition containing greater than or equal to 0.1 mass % each of titanium oxide and iron oxide is disclosed. The heat resistant silicone rubber composition can form a heat resistant silicone rubber suitable for use in a high temperature environment. A method of reducing formaldehyde and/or low molecular weight organopolysiloxane generated from a cured product of a heat resistant silicone rubber composition upon heating the cured product is also disclosed. The method comprises compounding greater than or equal to 0.1 mass % each of titanium oxide and iron oxide in the heat resistant silicone rubber composition. Generally, even when the cured product is heated to a high temperature, such as a temperature greater than or equal to 300° C., generation of formaldehyde and/or low molecular weight organopolysiloxane (e.g. D4, D5, and D6) from the cured product can be reduced.

Abstract: Provided is a resin composition excellent in processability and productivity, which improves low crystallization rate and improves processability in forming such as injection molding or sheet forming. Provided is a polyester resin composition including a polyester resin (A), a crystallization promoter (B), and pentaerythritol (C).

Abstract: A resin of the present disclosure includes a resin and a compound represented by General Formula I below. wherein each of R1, R2, R3, R4, R5, R6, R7 and R8 represents a hydrogen atom, a halogen atom, a hydroxyl group, or an aliphatic hydrocarbon group having a carbon number within a range from 1 to 8, and X represents a divalent linking group constituted by at least one species selected from among a single bond, an ether bond, and an alkylene group having a carbon number within a range from 1 to 15.

Abstract: The invention provides a flame retardant, a flame retardant composition, and a molded product and a manufacturing method thereof. The flame retardant has a structure shown in formula (1): in formula (1), Y1, Y2, and Y3 each independently represent an oxygen atom or a single bond; R1, R2, and R3 each independently represent a C1 to C6 alkyl group, a C3 to C6 cycloalkyl group, a phenyl group, or a phenyl group in which an arbitrary hydrogen atom is substituted by an alkyl group or a nitro group.

Abstract: A multifunctional composite material may include a polymer matrix, at least one nano-additive, micro-additive, and/or a spherical nano-additive. The non-metallic composite material may be used to make non-metallic parts for fuel conveyance systems for use in aircraft.

Abstract: A thermoplastic resin composition includes (A) a polyester resin, (B) inorganic fillers, and (C) a white pigment, wherein at least one of the (B) inorganic fillers and the (C) white pigment is subjected to surface treatment with a silicone compound, and silicon is present in an amount of about 0.3 wt % to about 2 wt % based on the total weight of (A), (B), and (C).

Abstract: There is provided a resin composition which contains a cellulose ester resin, a polyether ester compound, and an additive if necessary, the resin composition being capable of providing a resin shaped product with excellent transparency, tensile fracture energy property, and the like, and of being suppressed from deterioration of flowability.

Abstract: A resin composition includes at least a cellulose ester resin, a non-reactive plasticizer that does not have a functional group reactable with the cellulose ester resin, and a polyolefin-containing polyfunctional elastomer that includes polyolefin obtained by polymerizing olefins having 2 to 4 carbon atoms as a main component and that has a plurality of functional groups reactable with the cellulose ester resin.

Abstract: According to an exemplary embodiment of the present invention, there is provided a resin composition containing a cellulose ester resin, a compound containing an adipic acid ester, and a maleic anhydride-modified ethylene-vinyl acetate copolymer and a resin composition containing a cellulose ester resin, a compound containing an adipic acid ester, and a polyhydroxyalkanoate resin.

Abstract: An object of the present invention is to provide a rubber composition for tire which has less performance change with respect to a temperature change at a high temperature region and has less performance change with respect to a road surface change from a wet road surface to a dry road surface, and a tire which has a tire member composed of the rubber composition for tire. The rubber composition for tire of the present invention is a rubber composition for tire in which a complex modulus G*50° C. and a complex modulus G*100° C. satisfy the following formula (1): G*100° C./G*50° C.>0.85, an elongation at break EB23° C. and a loss tangent tan ?50° C. is not less than 0.12. The present invention also refers to a tire which has a tire member composed of the rubber composition for tire.

Abstract: The present invention provides a tire having improved wet grip performance and improved breaking properties while ensuring fuel economy. The present invention relates to a tire including a tire component formed of a vulcanized rubber composition obtained by vulcanizing a specific unvulcanized rubber composition.

Abstract: The invention provides a composition comprising a first ethylene-based polymer, formed by a high pressure, free-radical polymerization process, and a second ethylene-based polymer, formed by a high pressure, free-radical polymerization process, such composition comprising the following properties: a) a melt index (12) from 2.0 to 10 dg/min; b) a density from 0.922 to 0.935 g/cc; and wherein the second ethylene-based Hyper polymer is present in an amount from 60 to 95 weight percent, based on the sum of the weight of the first polymer and the second polymer; and wherein the second ethylene-based polymer has a density greater than, or equal to, 0.924 g/cc; and wherein the first ethylene-based polymer has a melt index less than 2.

Abstract: A masterbatch of additives is useful for maintaining a constant and reduced coefficient of friction in polyethylene (PE) based films. The masterbatch is a compounded blend of siloxane additive in conjunction with a mineral, a cyclic olefin copolymer and, optionally, an antioxidant. These additives are different from the polar additives used in the past to reduce COF of PE films and do not have inherent incompatibility with the nonpolar PE matrix.

Abstract: Curable rubber compositions and cured articles are based on the use of zinc activator compositions for the sulfur cure. Activator compositions contain zinc and a polymeric component having a plurality of COOH groups, at least some of which are neutralized with the zinc. With polymeric zinc activators, sulfur cure can be activated at levels of zinc below those used in conventional systems.

Abstract: A methacrylic resin [1] having a triad syndiotacticity (rr) of not less than 65% and a methacrylic resin [2] having a triad syndiotacticity (rr) of 45 to 58% are melt kneaded in a mass ratio of the methacrylic resin [1]/the methacrylic resin [2] of 40/60 to 70/30, and further melt kneaded preferably with a polycarbonate resin in a ratio of 1 to 10 parts by mass of the polycarbonate resin to the total 100 parts by mass of the methacrylic resin [1] and the methacrylic resin [2] to obtain a methacrylic resin composition.

Abstract: A chemical treatment apparatus for diluting and activating a polymeric material can include a mixing chamber having a first end, a second end, a first baffle plate positioned between the first end and second end, a high shear mixing zone positioned between the first end of the mixing chamber and the first baffle plate, and a low shear mixing zone positioned downstream from the high shear agitation zone between the second end of the mixing chamber and the first baffle plate. The volume ratio of the high shear mixing zone to the low shear mixing zone can be in the range of 1:2 to 1:10. A method and system for diluting and activating polymeric materials are also disclosed.

Abstract: The present invention relates to halogen-free flame-retardants for thermoplastic polyesters with UL 94 V-0 classification and with particularly good mechanical properties and high tracking resistance.

Abstract: The present invention is directed to a polyester resin composition for providing a reflector having excellent mechanical strength and heat resistance, maintaining high reflectance even in a heated environment such as an LED manufacturing process or a reflow soldering process, and having small change in shrinkage rate. The polyester resin composition for a reflective material is a composition comprising 30 to 80% by mass of a polyester resin (A) with a melting point or a glass transition temperature of 250° C. or more, 10 to 35% by mass of a glass fiber (B) with a minor axis of 3 to 8 ?m, 5 to 50% by mass of a white pigment (C), and 0.3 to 1.5% by mass of an olefin polymer (D) containing 0.2 to 1.8% of a functional group structural unit (all based on a total of (A), (B), (C) and (D) which is 100% by mass).

Abstract: The present invention provides the following process for producing a fine organic pigment which is capable of producing the fine organic pigment that has a very small primary particle size and is excellent in filtering property even in a cleaning step, and a fine organic pigment produced by the process; a process for producing a dispersion using the fine organic pigment, and a dispersion produced by the process; and a process for producing an ink using the dispersion. The present invention relates to [1] a process for producing a fine organic pigment, including steps 1 and 2: step 1: kneading a mixture prepared by compounding a raw material organic pigment, a water-soluble inorganic salt, a water-soluble organic solvent and a compound represented by the following formula (1) with each other, the compound being compounded in an amount of not less than 0.8 part by mass and not more than 18.

Abstract: The present invention provides a process for producing a fine organic pigment having a very small primary particle size, and a fine organic pigment produced by the process; a process for producing a dispersion using the fine organic pigment, and a dispersion produced by the process; and a process for producing an ink using the dispersion. The present invention relates to [1] a process for producing a fine organic pigment, including step 1 of kneading a mixture prepared by blending a raw material organic pigment, a water-soluble inorganic salt, a water-soluble organic solvent and water with each other, the water being blended in an amount of not less than 0.6 part by mass and not more than 4.