Abstract: Provided is a method of producing a polycarboxylic acid-based polymer, the method including adding a monomer composition containing an unsaturated monocarboxylic acid-based monomer and/or an unsaturated dicarboxylic acid-based monomer to a reaction vessel to perform a polymerization reaction, which enables effective suppression of the foaming of a polymerization reaction liquid. The method of producing a polycarboxylic acid-based polymer of the present invention is a method of producing a polycarboxylic acid-based polymer, the method including adding a monomer composition containing an unsaturated monocarboxylic acid-based monomer and/or an unsaturated dicarboxylic acid-based monomer to a reaction vessel to perform a polymerization reaction, the method further including adding a defoaming agent by a time when 100 mass % of a total amount of the monomer composition is added.

Abstract: Provided is a method of producing a polycarboxylic acid-based polymer, the method including adding a monomer composition containing an unsaturated monocarboxylic acid-based monomer and/or an unsaturated dicarboxylic acid-based monomer to a reaction vessel to perform a polymerization reaction, which enables effective suppression of the foaming of a polymerization reaction liquid. The method of producing a polycarboxylic acid-based polymer of the present invention is a method of producing a polycarboxylic acid-based polymer, the method including adding a monomer composition containing an unsaturated monocarboxylic acid-based monomer and/or an unsaturated dicarboxylic acid-based monomer to a reaction vessel to perform a polymerization reaction, the method further including adding a defoaming agent by a time when 100 mass % of a total amount of the monomer composition is added.

Abstract: Provided is a copolymer aqueous solution which exerts a high calcium carbonate-deposition suppressing ability even under high hardness condition, has excellent storage stability, and suppresses coloring of a detergent to yellow even when used as a detergent raw material.

Abstract: The present invention provides a method for efficiently producing a sulfonic acid group-containing ether compound having a high purity and a good polymerizability while preventing production of a byproduct, and provides a sulfonic acid group-containing ether compound containing fewer impurities and having a good radical (co)polymerizability. The present invention provides a method of producing a sulfonic acid group-containing ether compound by reacting a sulfurous acid compound with a compound represented by the formula (1): wherein R1 represents a single bond, a CH2 group, or a CH2CH2 group, and R2 represents H, or a CH3 group, the method comprising the steps of: adjusting pH of a reaction system to 5.5 or greater with use of an alkaline substance; and adding the compound represented by the formula (1) to a reaction vessel containing the sulfurous acid compound.

Abstract: The present invention provides a method for efficiently producing a sulfonic acid group-containing ether compound having a high purity and a good polymerizability while preventing production of a byproduct, and provides a sulfonic acid group-containing ether compound containing fewer impurities and having a good radical (co)polymerizability. The present invention provides a method of producing a sulfonic acid group-containing ether compound by reacting a sulfurous acid compound with a compound represented by the formula (1): wherein R1 represents a single bond, a CH2 group, or a CH2CH2 group, and R2 represents H, or a CH3 group, the method comprising the steps of: adjusting pH of a reaction system to 5.5 or greater with use of an alkaline substance; and adding the compound represented by the formula (1) to a reaction vessel containing the sulfurous acid compound.

Abstract: The present invention provides a method for efficiently producing a sulfonic acid group-containing ether compound having a high purity and a good polymerizability while preventing production of a byproduct, and provides a sulfonic acid group-containing ether compound containing fewer impurities and having a good radical (co)polymerizability. The present invention provides a method of producing a sulfonic acid group-containing ether compound by reacting a sulfurous acid compound with a compound represented by the formula (1): wherein R1 represents a single bond, a CH2 group, or a CH2CH2 group, and R2 represents H, or a CH3 group, the method comprising the steps of: adjusting pH of a reaction system to 5.5 or greater with use of an alkaline substance; and adding the compound represented by the formula (1) to a reaction vessel containing the sulfurous acid compound.

Abstract: Laundry detergents or cleaning compositions which comprises a copolymer composition comprising i) a copolymer having a weight-average molecular weight of from about 10,000 to about 50,000 and comprising a) 30-60 mol% structural units derived from monoethylenically unsaturated dicarboxylic acid or dicarboxylate; b) structural units derived from monoethylenically unsaturated monocarboxylic acid or monocarboxylate; c) structural units derived from monomers containing sulfonic acid or sulfonate groups and having no ester bonds or amido bonds; and ii) 10,000 ppm or less of residual monoethylenically unsaturated dicarboxylic acid or dicarboxylate monomer.

Abstract: An ADW composition comprising a builder and a water-soluble copolymer which comprises: (a) from about 30 to 60 mol % of the copolymer having a structural unit originating from a monoethylenic unsaturated dicarboxylic acid (or dicarboxylate) monomer having 4 to 6 carbon atoms or its anhydride at; (b) from about 30 to 60 mol % of the copolymer having a structural unit originating from a monoethylenic unsaturated monocarboxylic acid (or monocarboxylate) monomer having 3 to 8 carbon atoms; and (c) from about 5 to 15 mol % of the polymer having a structural unit originating from a monoethylenic unsaturated monomer having a sulfonic (or sulfonate) group; wherein the water-soluble copolymer has a weight average molecular weight of from about 1,000 to about 50,000 wherein the copolymer is polymerized with hydrogen peroxide.

Abstract: The present invention provides a method for efficiently producing a sulfonic acid group-containing ether compound having a high purity and a good polymerizability while preventing production of a byproduct, and provides a sulfonic acid group-containing ether compound containing fewer impurities and having a good radical (co)polymerizability. The present invention provides a method of producing a sulfonic acid group-containing ether compound by reacting a sulfurous acid compound with a compound represented by the formula (1): wherein R1 represents a single bond, a CH2 group, or a CH2CH2 group, and R2 represents H, or a CH3 group, the method comprising the steps of: adjusting pH of a reaction system to 5.5 or greater with use of an alkaline substance; and adding the compound represented by the formula (1) to a reaction vessel containing the sulfurous acid compound.

Abstract: To provide a continuous production method for producing a water-soluble polymer with a narrow molecular weight distribution with high efficiency. A continuous production method of a water-soluble polymer, comprising the steps of: circulating a circulation liquid containing a monomer having a polymerizable unsaturated bond through a reaction apparatus: having a tank and a circulation line comprising a piping circulating outside the tank, and thereby producing a water-soluble polymer continuously; and discharging part of the circulation liquid from a discharge line, wherein the circulation line is provided with a cooling device at least at one position.

Abstract: A hydrophilic graft polymer having the reducing amount of the residual unsaturated monocarboxylic acid, and having very excellent temporal stability is provided. The present invention relates to the hydrophilic graft polymer obtained by graft polymerization of monomer component containing unsaturated monocarboxylic acid onto polyalkylene oxide, wherein mole ratio of side chain moiety derived from the unsaturated monocarboxylic acid is more than 90% by mole relative to total side chain, and residual amount of unsaturated monocarboxylic acid is less than 200 ppm by mass relative to the total mass of said hydrophilic graft polymer.

Abstract: An ADW composition comprising a builder and a water-soluble copolymer which comprises: (a) from about 30 to 60 mol % of the copolymer having a structural unit originating from a monoethylenic unsaturated dicarboxylic acid (or dicarboxylate) monomer having 4 to 6 carbon atoms or its anhydride at; (b) from about 30 to 60 mol % of the copolymer having a structural unit originating from a monoethylenic unsaturated monocarboxylic acid (or monocarboxylate) monomer having 3 to 8 carbon atoms; and (c) from about 5 to 15 mol % of the polymer having a structural unit originating from a monoethylenic unsaturated monomer having a sulfonic (or sulfonate) group; wherein the water-soluble copolymer has a weight average molecular weight of from about 1,000 to about 50,000 wherein the copolymer is polymerized with hydrogen peroxide.

Abstract: Provided are a copolymer composition which can achieve a high level of compatibility between clay dispersibility under water having high hardness and an anti-iron deposition ability and is suitable for an additive for a detergent, and a method of producing the composition. The copolymer composition of the present invention includes a copolymer (P) which has a weight average molecular weight of 10,000 to 50,000 and contains a structural unit originating from a monoethylenic unsaturated dicarboxylic acid (or dicarboxylate) monomer (a) at 30 to 60 mol %, a structural unit originating from a monoethylenic unsaturated monocarboxylic acid (or monocarboxylate) monomer (b), and a structural unit originating from a sulfonic acid (or sulfonate) group-containing monomer (c) free of an ester bond and an amide bond, and a remaining monoethylenic unsaturated dicarboxylic acid (or dicarboxylate) monomer a content of which in terms of an acid is less than 12,000 ppm.

Abstract: Provided is a copolymer aqueous solution which exerts a high calcium carbonate-deposition suppressing ability even under high hardness condition, has excellent storage stability, and suppresses coloring of a detergent to yellow even when used as a detergent raw material.

Abstract: Laundry detergents or cleaning compositions which comprises a copolymer composition comprising i) a copolymer having a weight-average molecular weight of from about 10,000 to about 50,000 and comprising a) 30-60 mol % structural units derived from monoethylenically unsaturated dicarboxylic acid or dicarboxylate; b) structural units derived from monoethylenically unsaturated monocarboxylic acid or monocarboxylate; c) structural units derived from monomers containing sulfonic acid or sulfonate groups and having no ester bonds or amido bonds; and ii) 10,000 ppm or less of residual monoethylenically unsaturated dicarboxylic acid or dicarboxylate monomer.

Abstract: To provide: a water-soluble amphoteric copolymer having excellent hydrophilicity and high adsorption capability, and capable of exhibiting dramatically excellent dispersibility even under high hardness conditions and being preferably used in a detergent composition application, for example; an application thereof; and a production method of such a water-soluble amphoteric copolymer.

Abstract: A hydrophilic graft polymer having the reducing amount of the residual unsaturated monocarboxylic acid, and having very excellent temporal stability is provided. The present invention relates to the hydrophilic graft polymer obtained by graft polymerization of monomer component containing unsaturated monocarboxylic acid onto polyalkylene oxide, wherein mole ratio of side chain moiety derived from the unsaturated monocarboxylic acid is more than 90% by mole relative to total side chain, and residual amount of unsaturated monocarboxylic acid is less than 200 ppm by mass relative to the total mass of said hydrophilic graft polymer.

Abstract: To provide: an N-vinyl cyclic lactam polymer, which has excellent dispersibility and adsorptivity, and high calcium-ion capturing capability and can be preferably used in, for example, a detergent additive application; an application thereof; and a production method of the N-vinyl cyclic lactam polymer, the production method being capable of efficiently producing such an N-vinyl cyclic lactam polymer. An N-vinyl cyclic lactam polymer produced by a polymerization of a monomer component containing a carboxyl group-containing unsaturated monomer with a polymer having an N-vinyl cyclic lactam unit, wherein the carboxyl group-containing unsaturated monomer is 200 to 9900 parts by weight, relative to 100 parts by weight of the polymer having an N-vinyl cyclic lactam unit, and the N-vinyl cyclic lactam polymer has a viscosity at 25° C. of 100000 mPa·s or less in an aqueous solution with a solid content of 25% by weight.

Abstract: There are disclosed a novel sulfur-containing poly(unsaturated carboxylic acid) and its uses and production process. A sulfur-containing poly(unsaturated carboxylic acid) having a weight-average molecular weight (Mw) of 500 to 4,500 and a molecular weight distribution (Mw/Mn) of not more than 2.

Abstract: A liquid detergent builder which is highly compatible with a surfactant and gives transparent liquid detergents having extremely excellent detergency, a liquid detergent containing the builder, and a liquid detergent containing an acrylic acid-based polymer (salt) having excellent clay dispersibility and good compatibility with a surfactant. The liquid detergent builder comprises an acrylic acid/maleic acid-based copolymer (salt), wherein the acrylic acid/maleic acid-based copolymer (salt) contains maleic acid (salt) in an amount of 5-90 mol % per mole of the sum of acrylic acid (salt) and maleic acid (salt), and a product (MA×Mw) of a weight average molecular weight (Mw) of the copolymer (salt) and a proportion (MA (mol %)) of the maleic acid (salt) in the copolymer (salt) is 450,000 or less.