Abstract: The present invention provides a method for producing a hetero-type monodisperse polyethylene glycol, which includes a step (A) of carrying out a nucleophilic substitution reaction between a compound of the formula (2) and a compound of the formula (3) so as to satisfy the requirement of the expression (F1) to obtain a compound of the formula (4), a step (B) of carrying out the Michaels addition reaction of a compound of the formula (5) to the compound of the formula (4) at a temperature condition of 10° C.

Abstract: A method of manufacturing an iron soap is disclosed herein. The method comprising the steps of: reacting, at a temperature equal to or lower than a crystal transition initiation temperature of the iron soap to be manufactured, between a straight-chain saturated fatty acid alkali metal salt aqueous solution having from 12 to 22 carbons and a trivalent iron salt aqueous solution with pH of 0.1 to 5.5 so as to prepare an iron soap slurry; and adjusting pH of the prepared iron soap slurry to from 0.1 to 6.0.

Abstract: (Object) An object is to suppress the peeling and lamination misalignment of ceramic green sheets without deteriorating the sheet strength. (Solution) A ceramic green sheet lamination aid comprising a compound represented by formula (1). Z—[O-(AO)n-H]x??(1) (Z represents a residual group of a compound having a number of carbons group of 1 to 22 and having hydroxyl groups of 1 to 6 in which all of said hydroxyl groups are removed; x represents a number of 1 to 6; AO represents an oxyalkylene group having a number of carbons of 2 to 4; n represents a number of 5 to 500; x×n is in a range of 5 to 500; and a weight ratio of oxyethylene group EO contained in the oxyalkylene group AO having the number of carbons of 2 to 4 is 0 to 80 weight %.

Abstract: To provide a hydrophilic polymer derivative having a novel linker technique which is able to from a hydrophilic polymer pro-drug of a drug containing an amino group or the like in order to overcome the restrictions of conventional hydrophilic polymer pro-drugs.

Abstract: Disclosed herein is a resin composition including an ethylene-acrylic acid alkyl ester copolymer (L), a graft copolymer (M), and a styrene-based elastomer (N), wherein the graft copolymer (M) is obtained by a reaction among an ethylene-acrylic acid alkyl ester copolymer (A), a monomer component (B) containing at last one monomer selected from the group consisting of a (meth)acrylic acid alkyl ester monomer and an aromatic vinyl monomer, and t-butyl peroxymethacryloyloxyethyl carbonate (C), and a weight ratio between the ethylene-acrylic acid alkyl ester copolymer (A) and the monomer component (B) ((A)/(B)) is 50/50 to 98/2. The resin composition is capable of reducing squeaking noises generated by contact between a thermoplastic resin molded body and leather.

Abstract: An alkylene oxide derivative represented by formula (1), wherein a ratio Mz/Mw of a weight average molecular weight (Mw) and z average molecular weight (Mz) calculated from a chromatogram obtained by gel permeation chromatography measurement of the alkylene oxide derivative satisfies formula (2) below: Z - [ O - ( P ? O ) a - ( P ? O ) b / ( E ? O ) ? ? c ] - H ] n ( 1 ) 5 ? M z / M w ? 60 ( 2 ) where Z, n, PO, EO, a, b and c are as defined herein; a+b+c?10, and b/c=1/5˜5/1; (PO)b/(EO)c indicates that PO and EO are randomly added; and a random ratio x of PO and EO satisfies 0.1?x?1.

Abstract: There is provided a protein stabilizer for stably storing a protein in a solution. The protein may be an enzyme, an antibody, an enzyme-labeled antibody, or the like for a biochemical assay, etc. There is further provided a protein stabilization reagent comprising a protein-containing solution and the protein stabilizer dissolved therein. The protein stabilizer comprises a copolymer prepared by copolymerizing a monomer (a) of the following formula (1), a monomer (b) of the following formula (2), and a monomer (c) of the following formula (3).

Abstract: The present invention is a contact lens treatment solution containing the following copolymer A and copolymer B in a ratio of A/B=40/1 to 5/1 (by weight). According to the present invention, there can be provided a contact lens treatment solution capable of removing dirt having adhered to contact lens surfaces, capable of improving lubricity of contact lens surfaces and capable of imparting persisting hydrophilicity to contact lens surfaces, by simple immersion treatment. Copolymer A: a copolymer obtained by copolymerization of a monomer (a) represented by formula (1) and a monomer (b) represented by formula (2), in which the copolymerization ratio of the monomer (a) to the monomer (b), a/b=7/3 to 9/1 (by mol), and having a weight-average molecular weight of 400,000 to 800,000.

Abstract: Provided is a contact lens that can exhibit excellent breaking elongation and surface hydrophilicity even when produced using a hydrophobic mold made of polypropylene or the like without performing a surface hydrophilic treatment. Further provided are a monomer composition and a polymer that can be suitably used for obtaining the contact lens. This monomer composition contains (A) a siloxanyl group-containing itaconic acid diester monomer, (B) an amide group-containing monomer, (C) a hydroxy group-containing monomer, (D) a siloxanyl group-containing (meth)acrylate, and (E) a cross-linking agent in a specific ratio.

Abstract: It is provided an ester for a refrigerator oil and of mixed alcohols and mixed monocarboxylic acids. The mixed alcohols include dipentaerythritol and tripentaerythritol in a mass ratio of 90/10 to 99.7/0.3, and the mixed monocarboxylic acids include n-pentanoic acid and 2-methyl butanoic acid in a mass ratio of 50/50 to 80/20. The ester has a kinematic viscosity of 50 to 150 mm2/s at 40° C.

Abstract: A degradable polyethylene glycol derivative represented by formula (1). R1, R2, and R4 represent each independently a hydrogen atom or a hydrocarbon group having from 1 to 6 carbon atoms, and at least one of R1, R2, R3 and R4 is the hydrocarbon group; P1 is a straight-chain or branched polyethylene glycol chain having a number of ethylene glycol units of 3 or more; P2 is a straight-chain polyethylene glycol chain having a number of ethylene glycol units of 3 or more; w is an integer of 1 to 8; u is an integer of 1 to 10; X1 is a chemically reactive functional group; and Z1, Z2 and Z3 are each independently a selected divalent spacer.

Abstract: To provide an acrylic silicone graft copolymer capable of effectively exerting a function in a composition for external application containing various oily components such as a natural oil, a hydrocarbon oil, ester oil and a silicone oil, and a composition for external application containing the acrylic silicone graft copolymer. A composition for external application including an acrylic silicone graft copolymer, which contains 2 to 25 mass % of a constitutional unit represented by formula (I), 55 to 85 mass % of a constitutional unit represented by formula (II) and 2 to 20 mass % of a constitutional unit represented by formula (III). wherein R1 is an alkyl group having 1 to 4 carbon atoms; R2 is an alkylene group having 2 to 10 carbon atoms; and n is an integer of 1 to 100.

Abstract: Provided is a zwitterionic polymer that has a zwitterion that includes an effect of improving the stability of proteins. This zwitterionic polymer is a polymeric protein stabilizer that exhibits a protein stabilizing effect even at a small addition amount of addition, and at the same time has an antioxidant capability. Also provided is a method for producing this zwitterionic polymer. This problem is solved by a zwitterionic polymer containing a repeating unit represented by formula (1) and having a number-average molecular weight of 1,000 to 1,000,000. On formula (1), R1 and R2 are each independently selected from a hydrogen atom; linear, branched or cyclic alkyl groups having 1 to 6 carbons; aromatic groups having 6 to 20 carbons; or alkylene groups having 1 to 6 carbons and formed by linking R1 to R2. R3 represents a hydrogen atom or a methyl group).

Abstract: Provided is a wax which is used in a toner, whereby the toner is excellent in low-temperature fixability and heat-resistant shelf stability, the glossiness is improved as compared with the prior art, and the generation of ultrafine particles and the bleeding of the wax are not likely to occur. The wax for toners, wherein the wax is an ester wax generated by esterification of a pentaerythritol and a monocarboxylic acid; wherein the monocarboxylic acid used for the esterification contains a behenic acid, an arachidic acid and a stearic acid; and wherein, with respect to 100% by mass of the monocarboxylic acid, a content ratio of the behenic acid is from 60% by mass to 80% by mass; a content ratio of the arachidic acid is from 5% by mass to 15% by mass; and a content ratio of the stearic acid is from 15% by mass to 25% by mass.

Abstract: The present invention is a contact lens treatment solution containing the following copolymer A and copolymer B in a ratio of A/B=1000/1 to 2/1 (by weight). According to the present invention, there can be provided a contact lens treatment solution capable of removing dirt having adhered to contact lens surfaces and capable of imparting persisting hydrophilicity to contact lens surfaces, by simple immersion treatment. Copolymer A: a copolymer obtained by copolymerization of a monomer (a) represented by formula (1) and a monomer (b) represented by formula (2), in which the copolymerization ratio of the monomer (a) to the monomer (b), a/b=7/3 to 9/1 (by mol), and having a weight-average molecular weight of 400,000 to 700,000.

Abstract: It is provided an ester for a refrigerator oil and of mixed alcohols and mixed monocarboxylic acids. The mixed alcohols include dipentaerythritol and tripentaerythritol in a mass ratio of 90/10 to 99.7/0.3, and the mixed monocarboxylic acids include n-pentanoic acid and 2-methyl butanoic acid in a mass ratio of 50/50 to 80/20. The ester has a kinematic viscosity of 50 to 150 mm2/s at 40° C.

Abstract: A branched type hetero monodispersed polyethylene glycol represented by formula (1) (X1 and Y1 each represents an atomic group containing at least a functional group capable of reacting with a functional group present in a biofunctional molecule to form a covalent bond, provided that the functional group contained in the atomic group X1 and the functional group contained in the atomic group Y1 are different from each other, n represents a number of repeating units of a monodispersed polyethylene glycol and is an integer of 6 to 30, E is a branch site having a divalent bond valence number to L2 and a monovalent bond valence number to L3 and represents a glycerol site, L1 and L2 each independently represents a single bond or a divalent organic group, and L3 represents a single bond, -L4-(CH2)m1— or -L4-(CH2)m2-L5-(CH2)m3—, L4 represents any of an ether bond, an amide bond and a urethane bond, L5 represents an amide bond or a urethane bond, and m1, m2 and m3 each independently represents an integer or 1 to 5.

Abstract: Provided is a monomer suitable for application to an ophthalmic device, the monomer showing high surface hydrophilicity, a high oxygen transmissibility, and appropriate mechanical strength when copolymerized with a polymerizable monomer, such as a hydrophilic monomer. It has been recognized that a phosphorylcholine group-containing polysiloxane monomer can solve the problems.

Abstract: A biodegradable hydrogel having an acetal structure whose hydrolysis rate under different pH environments in the living body can be accurately controlled. The hydrogel is obtained by crosslinking a polyalkylene glycol derivative having a cyclic benzylidene acetal structure represented by formula (1) shown below with a crosslinking agent: where R1 and R6; R2, R3, R4 and R5; s; t; s+t; P1; Z1 and Z2; W1 and X1 are as defined herein.

Abstract: Provided is a water repellent composition which does not use a fluorine-containing monomer, especially a fluoroalkyl group-containing monomer. A water repellent composition which contains (1) (a) a polymer which has a repeating unit derived from an amide group-containing monomer that is represented by formula: (wherein R1 represents an organic residue having an ethylenically unsaturated polymerizable group; R2 represents a hydrocarbon group having 7-30 carbon atoms; and R3 represents a hydrocarbon group having 1-5 carbon atoms) in an amount of 2-100% by weight relative to the polymer, and (2) a liquid medium.