JP5481719B2 - Granular detergent composition - Google Patents

Description

  The present invention relates to a granular detergent composition having an excellent ability to prevent recontamination.

In recent years, there has been a demand for water-saving washing with less water from the viewpoint of energy saving and resource saving, and as a result, the bath ratio (mass ratio of washing water and clothes) tends to decrease. However, in general, when washing is performed under a low bath ratio, the dirt that is dropped during washing tends to contaminate the laundry again.
Various studies have been made to prevent re-contamination of clothing during washing. For example, JP-A-7-173493 discloses a detergent composition containing a specific carboxymethyl cellulose as a recontamination inhibitor. However, the detergent composition described in the above publication is not sufficiently effective in preventing recontamination, and the trend of water-saving washing is expected to further increase in the future.

JP 7-173493 A

  An object of the present invention is to provide a granular detergent composition having a high ability to prevent recontamination.

  The inventors of the present application have completed a granular detergent composition having improved anti-recontamination ability by combining high molecular weight carboxymethylcellulose under an α-sulfo fatty acid alkyl ester salt and a nonionic surfactant.

That is, the present invention
(A) α-sulfo fatty acid alkyl ester salt,
(B) a nonionic surfactant, and
(C) A granular detergent composition comprising carboxymethylcellulose having a degree of etherification of 0.2 to 1.3 and a weight average molecular weight of 100,000 or more or a salt thereof.

  With the granular detergent composition of the present invention, it is possible to obtain a high ability to prevent recontamination, particularly when washing cotton clothes.

前記式（Ａ−１）中、Ｒ¹¹は、炭素数８〜２０、好ましくは炭素数１４〜１６の直鎖もしくは分岐鎖状のアルキル基、または炭素数８〜２０の直鎖もしくは分岐鎖状のアルケニル基である。Ｒ¹²において、炭素数は１〜６であり、１〜３であることが好ましい。具体的にはメチル基、エチル基、プロピル基、イソプロピル基が挙げられ、洗浄力がより向上することからメチル基、エチル基、プロピル基が好ましく、メチル基が特に好ましい。
Ｍは、対イオンを表し、たとえばナトリウム、カリウム等のアルカリ金属塩；モノエタノールアミン、ジエタノールアミン、トリエタノールアミン等のアミン塩；アンモニウム塩等が挙げられ、なかでもアルカリ金属塩が好ましい。
本発明の粒状洗剤組成物におけるα−スルホ脂肪酸アルキルエステル塩の量は、全組成物を基準として好ましくは１〜５０質量％、より好ましくは５〜３０質量％、さらに好ましくは７〜１５質量％である。上記下限値以上であることにより、必要な洗浄力及び再汚染防止性を得ることができる。一方、上記上限値以下であっても洗浄力及び再汚染防止効果が充分に得られ、経済的にも有利である。 (A) α-sulfo fatty acid alkyl ester salt (MES)
The granular detergent composition of the present invention contains an α-sulfo fatty acid alkyl ester salt for the purpose of obtaining a recontamination preventing effect and a detergency improving effect.
As the α-sulfo fatty acid alkyl ester salt in the present invention, the kind thereof is not particularly limited, and any α-sulfo fatty acid alkyl ester salt used in a general granular detergent composition can be suitably used. Examples of suitable α-sulfo fatty acid alkyl ester salts are shown below.

In the formula (A-1), R ¹¹ is a linear or branched alkyl group having 8 to 20 carbon atoms, preferably 14 to 16 carbon atoms, or linear or branched chain having 8 to 20 carbon atoms. Of the alkenyl group. In R ¹² , the carbon number is 1 to 6, and preferably 1 to 3. Specific examples include a methyl group, an ethyl group, a propyl group, and an isopropyl group. A methyl group, an ethyl group, and a propyl group are preferable because the detergency is further improved, and a methyl group is particularly preferable.
M represents a counter ion and includes, for example, alkali metal salts such as sodium and potassium; amine salts such as monoethanolamine, diethanolamine and triethanolamine; ammonium salts, among which alkali metal salts are preferred.
The amount of the α-sulfo fatty acid alkyl ester salt in the granular detergent composition of the present invention is preferably 1 to 50% by mass, more preferably 5 to 30% by mass, further preferably 7 to 15% by mass based on the total composition. It is. By being more than the said lower limit, required detergency and recontamination prevention property can be acquired. On the other hand, even if it is less than the above upper limit value, the cleaning power and the effect of preventing recontamination can be sufficiently obtained, which is economically advantageous.

(B) Nonionic surfactant The granular detergent composition of the present invention contains a nonionic surfactant for the purpose of obtaining a recontamination preventing effect and a detergency improving effect.
The type of the nonionic surfactant in the present invention is not particularly limited, and any of the nonionic surfactants commonly used in general detergent compositions can be preferably used. Can be mentioned.
(1) Polyoxyalkylene alkyl ether or polyoxy obtained by adding an average of 3 to 30 moles, preferably 3 to 20 moles of an alkylene oxide having 2 to 4 carbon atoms to an aliphatic alcohol having 6 to 22 carbon atoms, preferably 8 to 18 carbon atoms An alkylene alkenyl ether.
Among these, preferable examples include polyoxyethylene alkyl ether, polyoxyethylene alkenyl ether, polyoxyethylene polyoxypropylene alkyl ether, and polyoxyethylene polyoxypropylene alkenyl ether.
Examples of the aliphatic alcohol used here include primary alcohols and secondary alcohols, and primary alcohols are preferred. The alkyl group or alkenyl group may be linear or branched.
(2) Polyoxyethylene alkyl phenyl ether or polyoxyethylene alkenyl phenyl ether.
(3) Fatty acid alkyl ester alkoxylates represented by, for example, the following general formula (I) in which alkylene oxide is added between ester bonds of long-chain fatty acid alkyl esters.
R ¹ CO (OA) n′OR ² (I).
[Wherein R ¹ CO represents a fatty acid residue having 6 to 22 carbon atoms, preferably 8 to 18 carbon atoms; OA represents an alkylene oxide having 2 to 4 carbon atoms, preferably 2 to 3 carbon atoms (for example, ethylene oxide, Propylene oxide or the like) is an addition unit (oxyalkylene group); n ′ is the average number of moles of alkylene oxide added, and is generally 3 to 30, preferably 5 to 20. R2 represents a lower (1 to 4 carbon) alkyl group which may have a substituent having 1 to 3 carbon atoms. ]
(4) Polyoxyethylene sorbitan fatty acid ester.
(5) Polyoxyethylene sorbite fatty acid ester.
(6) Polyoxyethylene fatty acid ester.
(7) Polyoxyethylene hydrogenated castor oil.
(8) Glycerin fatty acid ester.
Among the above nonionic surfactants, the nonionic surfactant (1) is preferable, and among these, an average of 5 to 20 moles of alkylene oxide having 2 to 4 carbon atoms was added to an aliphatic alcohol having 12 to 16 carbon atoms. Polyoxyalkylene alkyl ether or polyoxyalkylene alkenyl ether is particularly preferred, and polyoxyalkylene alkyl ether or polyoxyalkylene alkenyl ether added with an average of 7 to 15 mol is more preferred.
Also, polyoxyethylene alkyl ether, polyoxyethylene alkenyl ether, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene polyoxypropylene alkenyl ether, polyoxyethylene polyoxypropylene alkenyl ether, fatty acid methyl ester and ethylene having a melting point of 50 ° C. or less and HLB of 9 to 16 A fatty acid methyl ester ethoxylate to which an oxide is added, a fatty acid methyl ester ethoxypropoxylate in which ethylene oxide and propylene oxide are added to a fatty acid methyl ester, and the like are preferably used.
These nonionic surfactants can be used singly or in appropriate combination of two or more.
The above-mentioned “HLB” is a value determined by the Griffin method (Yoshida, Shindo, Ogaki, Yamanaka, edited by “New Edition Surfactant Handbook”, Kogyoshosho, 1991, p. 234) reference).
Moreover, said "melting point" means the value measured by the melting | fusing point measuring method described in JISK0064-1992 "The melting | fusing point and melting range measuring method of a chemical product".
The nonionic surfactant in the granular detergent composition of the present invention is preferably contained in an amount of 1-15% by mass, preferably 2-10% by mass, more preferably 3-7% by mass, based on the total composition. . By being more than the said lower limit, required detergency and recontamination prevention property can be acquired. On the other hand, even if it is less than the above upper limit value, the cleaning power and the effect of preventing recontamination can be sufficiently obtained, which is economically advantageous.
Moreover, it is more preferable at the point of the recontamination prevention property and economical efficiency that the range of the ratio of A / B is 1.0-4.0, and also 2.0-3.0.

（C-1）
[式中Ｒ¹〜Ｒ³は、それぞれ独立して水素原子、またはカルボキシメチル基（CH₂COOH）またはその塩を示す。]
カルボキシメチルセルロースの塩としては、ナトリウム、カリウムなどのアルカリ金属塩、アンモニウム塩などが挙げられ、これらの塩の混合物であってもよい。上記のうち、カルボキシメチルセルロース ナトリウム塩が好適に使用される。
本発明に使用されるカルボキシメチルセルロースまたはその塩としては、具体的には、ダイセル化学工業（株）から商品名「CMCダイセル」で販売されている、１１１０、１１２０、１１３０、１１４０、１１６０、１１７０、１１８０、１１９０、１２２０、１２４０、１２６０、１２８０、１２９０、１３８０、２２００、２２６０、２２８０、２４５０、２３４０等が挙げられ、日本製紙ケミカル（株）から商品名「サンローズ」で販売されているF１０LC、F６００LC、F１４００LC、F１０MC、F１５０MC、F３５０HC、F１４００MC、F１４００MGなどのサンローズFシリーズ、SLD-F1（以上商品名）が挙げられ、第一工業製薬（株）から商品名「セロゲン」で販売されているF-BSH-6、F-6HS9などが挙げられる。上記の中でも、CMCダイセル１１３０、１１４０、１１８０、１１９０、サンローズF１４００LC、F１４００MC、サンローズ SLD-F1、セロゲンF-6HS9が特に好ましい。
本発明において、カルボキシメチルセルロースまたはその塩は、1種または2種以上混合して用いる事ができる。カルボキシメチルセルロースまたはその塩の含有量は、本発明の粒状洗剤組成物中、好ましくは０．１〜５質量％であり、より好ましくは０．２〜５質量％、さらに好ましくは０．３〜３質量％の量である。上記下限値以上であることにより、必要な再汚染防止性を得ることができる。一方、上記上限値以下であっても再汚染防止効果が充分に得られ、経済的にも有利である。 (C) Carboxymethyl cellulose or a salt thereof The granular detergent composition of the present invention comprises carboxymethyl cellulose or a salt thereof having an etherification degree of 0.2 to 1.3 and a weight average molecular weight of 100,000 or more for the purpose of obtaining a recontamination preventing effect. .
Preferred examples of the carboxymethyl cellulose in the present invention include anionic water-soluble and water-insoluble cellulose ethers obtained by reacting monochloroacetic acid after treating pulp with caustic soda as cellulose as a raw material.
In the present invention, the weight average molecular weight of carboxymethylcellulose or a salt thereof is 100,000 or more, preferably 300,000 or more, more preferably 500,000 or more, still more preferably 600,000 or more, and particularly preferably 800,000 or more.
The upper limit is preferably 1.2 million or less, for example 1 million or less. By setting the range of the weight average molecular weight of carboxymethyl cellulose or a salt thereof as described above, the effect of preventing recontamination can be remarkably improved. On the other hand, if the weight average molecular weight of carboxymethylcellulose or a salt thereof is 1.2 million or less, the solubility is good. In the present invention, the weight average molecular weight of carboxymethylcellulose or a salt thereof can be measured by gel filtration chromatography (GPC) -differential refractive index detector (RI) system, and eluent: 0.1 M NaNO. ₃ , flow rate: 1 ml / min, sample: 0.02 to 0.3% by weight Solvent is 0.1M NaNO ₃ , injection amount: 200 μl means the value calculated as the weight average molecular weight in terms of PEG To do. In the above measurement, as an apparatus, for example, liquid feed pump: Shodex DS-4 (manufactured by Showa Denko), degasser: ERC3115 (manufactured by ERC), column: Shodex SB-806MHQ (manufactured by Showa Denko), differential refractive index Detector: Shodex RI-71 (made by Showa Denko) etc. can be used.
In the present invention, the degree of etherification of carboxymethylcellulose or a salt thereof is preferably 0.2 to 1.3, more preferably 0.2 to 0.8. In the present invention, the degree of etherification refers to the average number of hydroxyl groups substituted with a carboxymethyl group or a salt thereof per glucose ring unit (of the three hydroxyl groups of the glucose ring, how many are carboxymethyl groups or It indicates whether or not it has been replaced by a salt, and is a maximum of 3).

(C-1)
[Wherein R ^{1 to} R ³ each independently represents a hydrogen atom, a carboxymethyl group (CH ₂ COOH) or a salt thereof. ]
Examples of the salt of carboxymethyl cellulose include alkali metal salts such as sodium and potassium, ammonium salts, and the like, and a mixture of these salts may be used. Of the above, sodium carboxymethylcellulose is preferably used.
Specific examples of the carboxymethyl cellulose or salt thereof used in the present invention are 1110, 1120, 1130, 1140, 1160, 1170, sold under the trade name “CMC Daicel” by Daicel Chemical Industries, Ltd. 1180, 1190, 1220, 1240, 1260, 1280, 1290, 1380, 2200, 2260, 2280, 2450, 2340, and the like, F10LC sold under the trade name “Sunrose” from Nippon Paper Chemical Co., Ltd., Sunrose F series such as F600LC, F1400LC, F10MC, F150MC, F350HC, F1400MC, F1400MG, and SLD-F1 (named above) are listed under the trade name “Serogen” from Daiichi Kogyo Seiyaku Co., Ltd. Examples include F-BSH-6 and F-6HS9. Among these, CMC Daicel 1130, 1140, 1180, 1190, Sunrose F1400LC, F1400MC, Sunrose SLD-F1, and Serogen F-6HS9 are particularly preferable.
In the present invention, carboxymethylcellulose or a salt thereof can be used alone or in combination. The content of carboxymethyl cellulose or a salt thereof in the granular detergent composition of the present invention is preferably 0.1 to 5% by mass, more preferably 0.2 to 5% by mass, and further preferably 0.3 to 3%. It is the amount of mass%. By being more than the said lower limit, required recontamination prevention property can be acquired. On the other hand, even if it is below the above upper limit value, the effect of preventing recontamination can be sufficiently obtained, which is economically advantageous.

Other ingredients
In addition to the above components, the granular detergent composition of the present invention may further contain the following optional components as necessary.
<Anionic surfactant>
Examples of the anionic surfactant other than the component (A) that can be used in the present invention include the following.
(1) A linear or branched alkylbenzene sulfonate (LAS or ABS) having an alkyl group having 8 to 18 carbon atoms.
(2) Alkanesulfonate having 10 to 20 carbon atoms.
(3) C10-20 α-olefin sulfonate (AOS).
(4) Alkyl sulfate or alkenyl sulfate (AS) having 10 to 20 carbon atoms.
(5) Any one of alkylene oxides having 2 to 4 carbon atoms, or ethylene oxide and propylene oxide (molar ratio EO / PO = 0.1 / 9.9 to 9.9 / 0.1) with an average of 0.5 Alkyl (or alkenyl) ether sulfate (AES) having a linear or branched alkyl (or alkenyl) group having 10 to 20 carbon atoms added by 10 mol.
(6) Any one of alkylene oxides having 2 to 4 carbon atoms, or ethylene oxide and propylene oxide (molar ratio EO / PO = 0.1 / 9.9 to 9.9 / 0.1) on average 3 to 30 An alkyl (or alkenyl) phenyl ether sulfate having a linear or branched alkyl (or alkenyl) group having 10 to 20 carbon atoms added in a mole form.
(7) Any one of alkylene oxides having 2 to 4 carbon atoms, or ethylene oxide and propylene oxide (molar ratio EO / PO = 0.1 / 9.9 to 9.9 / 0.1) with an average of 0.5 An alkyl (or alkenyl) ether carboxylate having 10 to 20 moles of a linear or branched alkyl (or alkenyl) group having 10 to 20 carbon atoms.
(8) Alkyl polyhydric alcohol ether sulfates such as alkyl glyceryl ether sulfonic acids having 10 to 20 carbon atoms.
(9) Long chain monoalkyl, dialkyl or sesquialkyl phosphates.
(10) Polyoxyethylene monoalkyl, dialkyl or sesquialkyl phosphate.
(11) A higher fatty acid salt (soap) having 10 to 20 carbon atoms.
These anionic surfactants can be used as alkali metal salts such as sodium and potassium, amine salts and ammonium salts. These anionic surfactants may be used as a mixture.

<Cationic surfactant>
As a cationic surfactant which can be mix | blended with the granular detergent composition of this invention, the following can be mentioned, for example.
(1) Dilong chain alkyl dishort chain alkyl type quaternary ammonium salt.
(2) Mono long chain alkyl tri short chain alkyl type quaternary ammonium salt.
(3) Tri long chain alkyl mono short chain alkyl type quaternary ammonium salt.
However, the above “long chain alkyl” represents an alkyl group having 12 to 26 carbon atoms, preferably 14 to 18 carbon atoms.
The “short chain alkyl” includes a substituent such as a phenyl group, a benzyl group, a hydroxy group, and a hydroxyalkyl group, and may have an ether bond between carbons. Among them, an alkyl group having 1 to 4 carbon atoms, preferably 1 to 2 carbon atoms; a benzyl group; a hydroxyalkyl group having 2 to 4 carbon atoms, preferably 2 to 3 carbon atoms; a polyalkyl having 2 to 4 carbon atoms, preferably 2 to 3 carbon atoms. Oxyalkylene groups are preferred.

<Amphoteric surfactant>
Examples of amphoteric surfactants that can be incorporated into the granular detergent composition of the present invention include imidazoline-based amphoteric surfactants and amide betaine-based amphoteric surfactants. Specifically, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine and lauric acid amidopropyl betaine are preferable.

<Detergency Builder>
Detergency builders that can be incorporated into the granular detergent composition of the present invention include inorganic builders and organic builders.
Examples of inorganic builders include alkali metal carbonates such as sodium carbonate, potassium carbonate, sodium bicarbonate, and sesquicarbonate; alkali metal sulfites such as sodium sulfite and potassium sulfite; crystalline layered sodium silicate [eg, manufactured by Clariant Japan Ltd. Crystalline alkali metal silicates such as “Na-SKS-6” (δ-Na ₂ O · 2SiO ₂ )], amorphous alkali metal silicates; sulfates such as sodium sulfate and potassium sulfate; sodium chloride Alkali metal chlorides such as potassium chloride; phosphates such as orthophosphate, pyrophosphate, tripolyphosphate, metaphosphate, hexametaphosphate, phytate; crystalline aluminosilicate, amorphous aluminosilicate , Sodium carbonate and amorphous alkali metal silicate complex (e.g., Rhod a trade name "NABION15"), and the like.
Among the inorganic builders, sodium carbonate, aluminosilicate, or potassium salts (potassium carbonate, potassium sulfate, etc.) or alkali metal chlorides (potassium chloride, sodium chloride, etc.) are preferred as those having the effect of improving solubility.
As the aluminosilicate, either crystalline or amorphous (amorphous) can be used, and crystalline aluminosilicate is preferable from the viewpoint of cation exchange ability.
As the crystalline aluminosilicate, A-type, X-type, Y-type, P-type zeolite and the like can be suitably blended, and the average primary particle size is preferably 0.1 to 10 μm. The content of the crystalline aluminosilicate in the granular detergent composition is preferably 1 to 40% by mass, particularly preferably 2 to 30% by mass from the viewpoint of powder physical properties such as cleaning performance and fluidity.
When mix | blending potassium carbonate, the content is from a point of the effect of a solubility improvement, Preferably it is 1-15 mass% in a granular detergent composition, More preferably, it is 2-12 mass%, More preferably, it is 5-5. 12% by mass.
When blending an alkali metal chloride, the content thereof is preferably 1 to 10% by mass, more preferably 2 to 8% by mass, and still more preferably, in the granular detergent composition in terms of the effect of improving solubility. It is 3-7 mass%.
When blending the crystalline alkali metal silicate, the content thereof is preferably 0.5 to 40% by mass, more preferably 1 to 25% by mass, and further preferably from the viewpoint of cleaning performance in the granular detergent composition. Is 3 to 20% by weight, particularly preferably 5 to 15% by weight.
Examples of the organic builder include aminocarboxylates such as nitrilotriacetate, ethylenediaminetetraacetate, β-alanine diacetate, aspartate diacetate, methylglycine diacetate, and iminodisuccinate; serine diacetate, hydroxyiminodia Hydroxyaminocarboxylates such as succinate, hydroxyethylethylenediamine triacetate, dihydroxyethylglycine; Hydroxycarboxylates such as hydroxyacetate, tartrate, citrate, gluconate; pyromellitic acid salt, benzoate Cyclocarboxylates such as polycarboxylates, cyclopentanetetracarboxylates; ether carboxylates such as carboxymethyltaltronate, carboxymethyloxysuccinate, oxydisuccinate, tartaric acid mono- or disuccinate; Salt of acrylic acid-allyl alcohol copolymer, salt of acrylic acid-maleic acid copolymer, salt of polyacetal carboxylic acid such as polyglyoxylic acid; hydroxyacrylic acid polymer, polysaccharide-acrylic acid copolymer Salt of acrylic acid polymer or copolymer such as polymer; salt of polymer or copolymer such as maleic acid, itaconic acid, fumaric acid, tetramethylene 1,2-dicarboxylic acid, succinic acid, aspartic acid; starch, And polysaccharide derivatives such as polysaccharide oxides such as cellulose, amylose and pectin.
Among the organic builders, citrate, aminocarboxylate, hydroxyaminocarboxylate, polyacrylate, salt of acrylic acid-maleic acid copolymer, and salt of polyacetal carboxylic acid are preferable. In particular, hydroxyiminodisuccinate, salt of acrylic acid-maleic acid copolymer having a weight average molecular weight of 1000 to 80000, polyacrylate, polyglyoxyl having a weight average molecular weight of 800 to 1000000 (preferably 5000 to 200000) Polyacetal carboxylates such as acids (for example, those described in JP-A-54-52196) are preferred.
As for content of an organic builder, 1-20 mass% is preferable in a granular detergent composition, More preferably, it is 1-10 mass%, Most preferably, it is 2-5 mass%.
The said detergency builder can be used individually by 1 type or in combination of 2 or more types as appropriate.
Among the above detergency builders, the detergency and stain dispersibility in the washing liquid are improved, so that citrate, aminocarboxylate, hydroxyaminocarboxylate, polyacrylate, acrylic acid-maleic acid It is preferable to use an organic builder such as a polymer salt or a polyacetal carboxylic acid salt in combination with an inorganic builder such as zeolite.
The content of the detergency builder in the granular detergent composition is preferably 10 to 80% by mass and more preferably 20 to 75% by mass from the viewpoint of imparting sufficient cleaning performance.

<Bleaching agent>
As a bleaching agent that can be blended in the granular detergent composition of the present invention, for example, an inorganic peroxide that generates hydrogen peroxide when dissolved in water can be used. Usually, one or both of sodium percarbonate and sodium perborate are used. In particular, sodium percarbonate is preferred from the viewpoint of stability over time. When moisture or other detergent components come into contact with the surface of the inorganic peroxide particles, the inorganic peroxide may be decomposed. Therefore, it is preferable to perform a treatment such as coating to prevent this. As the particles in the form of coating, oxygen-based bleach particles that have already been proposed can be used. Examples thereof include bleaching particles described in Japanese Patent No. 2918991. The bleaching agent particles are granulated products obtained by spraying and drying sodium borate particles maintained in a fluidized state separately with a boric acid aqueous solution and an alkali metal silicate aqueous solution. In addition to the above, a conventionally known stabilizer such as a chelating agent may be used in combination with the coating agent.
Further, a bleach activator or a bleach activation catalyst can be used.
As the bleach activator, a known compound can be used, but an organic peracid precursor is preferably used.
Examples of the organic peracid precursor include tetraacetylethylenediamine, alkanoyloxybenzenesulfonic acid having 8 to 12 carbon atoms, alkanoyloxybenzoic acid having 8 to 12 carbon atoms, and salts thereof, among which 4-decanoyloxy Benzoic acid, sodium 4-dodecanoyloxybenzenesulfonate, and sodium 4-nonanoyloxybenzenesulfonate are preferred. These may be used alone or in combination of two or more.
Particles containing the bleach activator can be produced by a known production method. For example, it can be produced by an extrusion granulation method or a granulation method by a tablet shape using a briquetting machine.
Specifically, the organic peracid precursor particles are prepared by heating and melting a solid binder material at room temperature such as polyethylene glycol of PEG # 3000 to # 20000, preferably PEG # 4000 to # 6000. And a surfactant powder such as olefin sulfonate, alkylbenzene sulfonate, alkyl sulfate ester salt, and the like, and then extruded to produce a noodle-shaped organic peracid precursor granule having a diameter of about 1 mm. It is preferably blended by lightly pulverizing to about 0.5 to 3 mm. As the surfactant powder, an α-olefin sulfonate having an alkyl chain length of 14 is preferred.
A known compound can be used as the bleach activating catalyst. Specific examples include transition metal atoms and ligands such as copper, iron, manganese, nickel, cobalt, chromium, vanadium, ruthenium, rhodium, palladium, rhenium, tungsten, and molybdenum via nitrogen atoms, oxygen atoms, etc. As the transition metal contained, cobalt, manganese, etc. are preferable, and manganese is particularly preferable. In particular, a bleach activating catalyst described in JP-A No. 2004-189893 is preferable.
Particles containing the bleach activating catalyst can be produced by a known granulation method. For example, it can be produced by an extrusion granulation method or a granulation method by a tablet shape using a briquette machine.

<Fluorescent brightener>
Examples of the optical brightener include 4,4′-bis- (2-sulfostyryl) -biphenyl salt, 4,4′-bis- (4-chloro-3-sulfostyryl) -biphenyl salt, and 2- (styryl). Phenyl) naphthothiazole derivatives, 4,4′-bis (triazol-2-yl) stilbene derivatives, bis- (triazinylaminostilbene) disulfonic acid derivatives, and the like.
The above-mentioned optical brighteners can be used alone or in combination of two or more.
The content of the fluorescent brightening agent in the granular detergent composition is preferably 0.001 to 1% by mass.
Specific examples of commercially available products include Whiteex SA, Whitetex SKC (above, product; manufactured by Sumitomo Chemical Co., Ltd.); Chino Pearl AMS-GX, Chino Pearl DBS-X, and Chino Pearl CBS-X (above, trade name: Ciba Specialty Chemicals); Lemonite CBUS-3B (above, trade name: manufactured by Khyati Chemicals) and the like are preferable. Of these, Tinopearl CBS-X and Tinopearl AMS-GX are more preferable.

<Enzyme>
Enzymes that can be blended in the granular detergent composition of the present invention include hydrolases, oxidoreductases, lyases, transferases, and isomerases when classified from the reactivity of the enzyme. Either can be applied.
Of these, protease, esterase, lipase, nuclease, cellulase, amylase, pectinase and the like are preferable.
Specific examples of the protease include pepsin, trypsin, chymotrypsin, collagenase, keratinase, elastase, sptilisin, papain, promeline, carboxypeptidase A or B, aminopeptidase, aspergillopeptidase A or B, and the like.
Commercially available products include sabinase, alcalase, cannase, everase, deozyme (above, trade name; manufactured by Novozymes); API21 (trade name, manufactured by Showa Denko KK); Maxacar, maxapem (above, trade name: manufactured by Genencor) ); Protease K-14 or K-16 (protease described in JP-A-5-25492) and the like.
Specific examples of the esterase include gastric lipase, buncreatic lipase, plant lipase, phospholipase, cholinesterase, phosphotase and the like.
Specific examples of the lipase include commercially available lipases such as lipolase, Lipex (trade name; manufactured by Novozymes), and liposum (trade name, manufactured by Showa Denko KK).
As cellulases, for example, commercially available cellzymes, carezymes, cell cleans (trade names, manufactured by Novozymes); alkaline cellulase K, alkaline cellulase K-344, alkaline cellulase K-534, alkaline cellulase K-539, alkaline cellulase K-577 Alkaline cellulase K-425, alkaline cellulase K-521, alkaline cellulase K-580, alkaline cellulase K-588, alkaline cellulase K-597, alkaline cellulase K-522, CMCase I, CMCase II, alkaline cellulase E-II And alkaline cellulase E-III (the cellulase described in JP-A-63-264699).
Examples of the amylase include commercially available stainzymes, Termamyl, Duramil (trade name, manufactured by Novozymes) and the like.
The said enzyme can be used individually by 1 type or in combination of 2 or more types as appropriate.
In addition, it is preferable to use the enzyme granulated as separate stable particles in a state of being dry blended with detergent dough (particles).
The granular detergent composition of the present invention preferably contains the above-mentioned enzyme, particularly a protease and / or cellulase, together with a nonionic surfactant.

<Enzyme stabilizer>
As the enzyme stabilizer, for example, calcium salt, magnesium salt, polyol, formic acid, boron compound and the like can be blended. Of these, sodium tetraborate, calcium chloride and the like are preferable.
An enzyme stabilizer can be used individually by 1 type or in combination of 2 or more types as appropriate.
As for content of the enzyme stabilizer in a granular detergent composition, 0.05-2 mass% is preferable.

<Polymers>
In the granular detergent composition of the present invention, as a binder or a powder physical property modifier used when densifying the granular detergent composition particles, or for imparting a recontamination preventing effect on hydrophobic fine particles (dirt). Polyethylene glycol having an average molecular weight of 200 to 200,000, salt of acrylic acid and / or maleic acid polymer having a weight average molecular weight of 1,000 to 100,000, cellulose derivatives such as polyvinyl alcohol, hydroxypropyl methylcellulose (HPMC), cationized cellulose, powdered cellulose, etc. Cellulose or the like can be blended.
In addition, a copolymer of a repeating unit derived from terephthalic acid and a repeating unit derived from ethylene glycol and / or propylene glycol, a terpolymer, or the like can be blended as a soil release agent.
Further, polyvinyl pyrrolidone or the like can be blended in order to impart an effect of preventing color transfer.
Such polymers can be used singly or in appropriate combination of two or more.
As for content of the said polymers in a granular detergent composition, 0.05-5 mass% is preferable.

<Anti-caking agent>
As the anti-caking agent, paratoluenesulfonate, xylenesulfonate, acetate, sulfosuccinate, talc, fine powder silica, clay, magnesium oxide and the like can be blended.

<Antifoaming agent>
Examples of antifoaming agents that can be incorporated into the granular detergent composition of the present invention include conventionally known antifoaming agents such as silicone / silica-based ones. Moreover, you may use this antifoamer as an antifoamer granulated material obtained by the following manufacturing method.
First, 100 g of maltodextrin (trade name, manufactured by Nissho Chemical Co., Ltd .; enzyme-modified dextrin) is added with 20 g of silicone (compound type, product name: PS Antifoam, manufactured by Dow Corning) as an antifoam component and mixed. To obtain a homogeneous mixture. Next, after mixing 50 mass% of the obtained homogeneous mixture, polyethylene glycol (PEG-6000, melting point 58 ° C.) 25 mass%, and neutral anhydrous sodium sulfate 25 mass% at 70-80 ° C., an extrusion granulator ( Granulate by model EXKS-1, manufactured by Fuji Paudal Co., Ltd. to obtain a defoamer granulated product (see JP-A-3-186307).

<Reducing agent>
Examples of the reducing agent that can be blended in the granular detergent composition of the present invention include sodium sulfite and potassium sulfite.

<Metal ion scavenger>
The metal ion scavenger captures trace metal ions and the like in tap water and has an effect of suppressing the adsorption of metal ions to the fiber (object to be washed).
As metal ion scavengers that can be incorporated into the granular detergent composition of the present invention, in addition to those included in the detergency builder, aminopolyacetic acids such as ethylenediaminetetraacetic acid, nitrilotriacetic acid, glycolethylenediaminehexaacetic acid; 1-hydroxyethane-1,1-diphosphonic acid (HEDP-H), ethane-1,1-diphosphonic acid, ethane-1,1,2-triphosphonic acid, hydroxyethane-1,1,2-triphosphonic acid, ethane -1,2-dicarboxy-1,2-diphosphonic acid, hydroxymethanephosphonic acid, ethylenediaminetetra (methylenephosphonic acid), nitrilotri (methylenephosphonic acid), 2-hydroxyethyliminodi (methylenephosphonic acid), hexamethylenediamine Tetra (methylenephosphonic acid), diethylenetriaminepe Data (methylene phosphonic acid) organic phosphonic acid derivative or a salt thereof and the like; diglycolic acid, tartaric acid, oxalic acid, organic acids or salts thereof such as gluconic acid and the like.
The said metal ion trapping agent can be used individually by 1 type or in combination of 2 or more types as appropriate.
The content of the metal ion scavenger in the granular detergent composition is preferably 0.1 to 5% by mass, more preferably 0.5 to 3% by mass. If it is 0.1 mass% or more, the effect which capture | acquires the metal ion in tap water will improve. On the other hand, if it is 5 mass% or less, the effect of capturing metal ions is sufficiently obtained.

<PH adjuster>
The pH of the granular detergent composition of the present invention is not particularly limited, but from the viewpoint of cleaning performance, the pH in a 1% by mass aqueous solution of the granular detergent composition is preferably 8 or more, and the 1 mass It is more preferable that pH in a 9% aqueous solution is 9-11. When the pH is 8 or more, the cleaning effect is easily exhibited.
As a technique for controlling the pH of the granular detergent composition, the pH is usually adjusted with an alkaline agent. In addition to the alkaline agent described in the detergency builder, monoethanolamine, diethanolamine, triethanolamine, etc. Examples include alkanolamine, sodium hydroxide, potassium hydroxide and the like.
Specifically, for example, from the viewpoint of solubility in water and alkalinity, NABION15 (trade name, Rhodia Co., Ltd.), which is a mixture of sodium carbonate, sodium silicate, and water at a ratio of 55/29/16 (mass ratio). Are preferably used.
Moreover, in order to prevent that the pH of a granular detergent composition becomes high too much, it can also adjust to the said pH range using an acid etc.
Examples of such acids include the metal ion scavengers, alkali metal dihydrogen phosphates such as potassium dihydrogen phosphate, lactic acid, succinic acid, malic acid, gluconic acid, or polycarboxylic acids thereof, sodium hydrogen carbonate, sulfuric acid, Hydrochloric acid or the like can be used.
Further, it is possible to use a buffering agent for preventing a decrease in pH due to an acid component derived from fiber dirt during washing.
The said pH adjuster can be used individually by 1 type or in combination of 2 or more types as appropriate.

<Fragrance>
The fragrance in the present invention is not particularly limited, and any fragrance generally used in detergents may be used and comprises a fragrance component, a solvent, a fragrance stabilizer, and the like.
As such a fragrance, for example, those described in JP-A Nos. 2002-146399 and 2003-89800 can be used.
0.001-2 mass% is preferable and, as for content of the fragrance | flavor in a granular detergent composition, 0.01-1 mass% is more preferable.

<Dye>
In the present invention, various dyes such as dyes and pigments can be used to improve the appearance of the granular detergent composition. Of these, pigments are preferable from the viewpoint of storage stability, and those having oxidation resistance are particularly preferable.
Examples of such a dye include oxides, and preferable examples include titanium oxide, iron oxide, copper phthalocyanine, cobalt phthalocyanine, ultramarine blue, bitumen, cyanine blue, and cyanine green.

  The manufacturing method of the granular detergent composition of this invention is not restrict | limited in particular, It can manufacture with the manufacturing method generally used. For example, when the granular detergent composition is in powder form, a method of dispersing and dissolving a surfactant or other raw material in water and spray drying, kneading / extrusion, stirring granulation, rolling granulation, etc. It can be manufactured by a method in which it is subjected to kneading, granulation, compression molding and the like, and further pulverized as necessary.

According to the composition shown in Tables 1 and 2, a granular detergent composition was prepared by the preparation method shown below. Next, the prepared granular detergent composition was used for washing, and the anti-recontamination property of the cloth to be washed was evaluated. In the following examples, unless otherwise specified, “%” of the composition indicates mass%.
Examples 1-30, Comparative Examples 1-3
Step (A)
Water was put into a jacketed mixing tank equipped with a stirrer, and the temperature was adjusted to 60 ° C. To this was added a surfactant (excluding MES and nonionic surfactant) and stirred for 10 minutes. Subsequently, MA agent (acrylic acid / maleic acid copolymer sodium salt) was added. After further stirring for 10 minutes, a part of the powder A-type zeolite (1.0% for addition at the time of kneading, 5.0% for the grinding aid, 1.5% from the addition amount described in Tables 1 and 2) %), Sodium carbonate, potassium carbonate, and sodium sulfate were added. The slurry was further stirred for 20 minutes to prepare a slurry for spray drying having a moisture content of 38%, and then spray dried using a countercurrent spray drying tower at a hot air temperature of 280 ° C. to obtain an average particle size of 320 μm and a bulk density of 0.30 g / Spray dried particles with cm ³ and 5% moisture were obtained.
Process (B)
Spray dried particles obtained in step (A), MES mixed concentrate (A-1), 1.0% powder A-type zeolite, remaining nonionic surfactant except 0.5% nonionic surfactant for spray addition Agent, fluorescent whitening agent, and water were added to a continuous kneader (Kurimoto Steel Works, KRC-S4 type), kneaded under conditions of kneading capacity 120 kg / hr, temperature 60 ° C., surfactant A 6% water-containing mixture was obtained.
Process (C)
The mixture obtained in the step (B) was cut with a cutter while extruding it using a pelleter double (Fuji Powder Co., Ltd., EXDFJS-100 type) equipped with a die with a hole diameter of 10 mm (cutter peripheral speed was 5 m). / S) A pellet having a length of about 5 to 30 mm was obtained.
Next, Fitzmill in which 5.0% of powder A-type zeolite (average particle size 180 μm) as a grinding aid was added to the obtained pellets and arranged in three stages in series in the presence of cold air (10 ° C., 15 m / s) (Screen hole diameter: 1st stage / 2nd stage / 3rd stage = 12 mm / 6 mm / 3 mm, rotation speed: 1st stage / 2nd stage / (The third stage is 4700 rpm).
Post-treatment The powder obtained above, carboxymethylcellulose, coated sodium carbonate particles, sodium sulfite were mixed with a horizontal cylindrical rolling mixer (cylinder diameter 585 mm, cylinder length 490 mm, drum inner wall surface of container 131.7 L and inner wall surface). (With two baffle plates with a clearance of 20 mm and a height of 45 mm), 1.5% of powder A-type zeolite was added under the conditions of a filling rate of 30% by volume, a rotation speed of 22 rpm and 25 ° C., and 0.5% The particles were obtained by rolling for 1 minute while spraying the nonionic surfactant and the perfume.
In order to color a part of the obtained particles, the particles are transferred on a belt conveyor at a speed of 0.5 m / s (the surfactant-containing particle layer on the belt conveyor has a height of 30 mm and a layer width of 300 mm) A 20% aqueous dispersion of the pigment was sprayed on the surface (average particle size 500 μm, bulk density 0.84 g / cm ³ ).
Filling rate of 30 with a horizontal cylindrical rolling mixer (cylinder diameter: 585 mm, cylinder length: 490 mm, inner wall surface of drum of container 131.7 L, clearance between inner wall surface: 20 mm, height: 45 mm) Under the conditions of volume%, rotation speed 22 rpm, and 25 ° C., the particles and enzyme obtained above were added and mixed for 5 minutes to obtain a granular detergent composition.

Comparative Examples 4 and 6
In the production method of Example 1, a granular detergent composition was produced in the same manner except that the MES mixed concentrate in the step (B) was not added.
Comparative Example 5
Step (A)
Water was put into a jacketed mixing tank equipped with a stirrer, and the temperature was adjusted to 60 ° C. To this all surfactant was added and stirred for 10 minutes. Subsequently, MA agent (acrylic acid / maleic acid copolymer sodium salt) was added. After further stirring for 10 minutes, a part of the powder A-type zeolite (1.0% for addition during kneading, 5.0% for grinding aid, 1.5% surface from the addition amount described in Table 2) Amount excluding each type A zeolite for coating), sodium carbonate, potassium carbonate and sodium sulfate were added. The slurry was further stirred for 20 minutes to prepare a slurry for spray drying having a moisture content of 38%, and then spray dried using a countercurrent spray drying tower at a hot air temperature of 280 ° C. to obtain an average particle size of 320 μm and a bulk density of 0.30 g / Spray dried particles with cm ³ and 5% moisture were obtained.
Process (B)
The spray-dried particles obtained in step (A), 1.0% powder A-type zeolite, fluorescent whitening agent and water were put into a continuous kneader (Kurimoto Steel Works, KRC-S4 type) The mixture was kneaded under the conditions of a sum capacity of 120 kg / hr and a temperature of 60 ° C. to obtain a mixture of 6% water containing a surfactant.
Process (C)
The mixture obtained in the step (B) was cut with a cutter while extruding it using a pelleter double (Fuji Powder Co., Ltd., EXDFJS-100 type) equipped with a die with a hole diameter of 10 mm (cutter peripheral speed was 5 m). / S) A pellet having a length of about 5 to 30 mm was obtained.
Next, Fitzmill in which 5.0% of powder A-type zeolite (average particle size 180 μm) as a grinding aid was added to the obtained pellets and arranged in three stages in series in the presence of cold air (10 ° C., 15 m / s) (Screen hole diameter: 1st stage / 2nd stage / 3rd stage = 12 mm / 6 mm / 3 mm, rotation speed: 1st stage / 2nd stage / (The third stage is 4700 rpm).
Post-treatment The powder obtained above, carboxymethylcellulose, coated sodium carbonate particles, sodium sulfite were mixed with a horizontal cylindrical rolling mixer (cylinder diameter 585 mm, cylinder length 490 mm, drum inner wall surface of container 131.7 L and inner wall surface). (With two baffles with clearance of 20 mm and height of 45 mm), 1.5% powder A-type zeolite was added and spraying the fragrance under the conditions of a filling rate of 30% by volume, a rotational speed of 22 rpm, and 25 ° C. Rolled for 1 minute to obtain surface modified particles.
In order to color a part of the obtained particles, the particles are transferred on a belt conveyor at a speed of 0.5 m / s (the surfactant-containing particle layer on the belt conveyor has a height of 30 mm and a layer width of 300 mm) A 20% aqueous dispersion of the pigment was sprayed on the surface (average particle size 500 μm, bulk density 0.84 g / cm ³ ).
Filling rate of 30 with a horizontal cylindrical rolling mixer (cylinder diameter: 585 mm, cylinder length: 490 mm, inner wall surface of drum of container 131.7 L, clearance between inner wall surface: 20 mm, height: 45 mm) Under the conditions of volume%, rotation speed 22 rpm, and 25 ° C., the particles and enzyme obtained above were added and mixed for 5 minutes to obtain a granular detergent composition.

Details of each component in Tables 1 and 2 are as follows.
<A component>
A-1:
(Sulfonation process)
Methyl palmitate (product name: Pastel M-16, manufactured by Lion Corporation) and methyl stearate (product name: Pastel M-180, manufactured by Lion Corporation) are 80:20 (mass ratio). The fatty acid methyl ester mixture was mixed with a hydrogenation treatment by a conventional method and purified by reducing the iodine value to 0.2, and the mixture was dehumidified using a falling film reactor. Sulfonation was performed with SO ₃ gas diluted to 7% under conditions of a reaction molar ratio (SO ₃ / saturated fatty acid ester) = 1.18 and a reaction temperature of 80 ° C.
(Aging process)
The resulting sulfonated product was introduced into a loop ripening tube with a double tube jacket having an average residence time of 20 minutes. In order to connect three loop aging tubes in succession, average residence time is 60 minutes, and in order to maintain sufficient stirring and constant temperature, the loop aging tubes are allowed to flow at a linear speed of 0.16 m / s. The actual temperature was controlled at 78 to 82 ° C. with respect to 80 ° C., and the aging reaction was performed to complete the sulfonation to obtain α-sulfo fatty acid methyl ester.
(Esterification / bleaching process)
After introducing 20 parts by mass of methanol (Methanol manufactured by Sumitomo Chemical Co., Ltd .: industrial grade moisture 500 ppm or less) to 100 parts by mass of the obtained α-sulfo fatty acid methyl ester, this mixture and 35% hydrogen peroxide (Mitsubishi Gas Chemical). 5.7 parts by mass of 35% industrial hydrogen peroxide (industrial grade), bleached by introducing 5.7 parts by mass into a continuous loop reactor equipped with a mixing mixer and a heat exchanger, and bleached product of α-sulfo fatty acid methyl ester Got.
(Neutralization process)
Next, 48% NaOH aqueous solution (Daiso Co., Ltd. Kake Soda: industrial grade) and nonionic surfactant, water, methanol (Sumitomo Chemical Co., Ltd. methanol: industrial grade), so that each raw material surfactant composition. The α-sulfo fatty acid methyl ester bleached product and linear alkylbenzene sulfonic acid were continuously fed to the neutralization line.
The neutralization method employs the neutralization method described in JP-A No. 2001-64248, and a 48% sodium hydroxide aqueous solution is quantitatively fed between the premixer and the neutralization mixer, and the medium is continuously added. I was able to sum up. Then, the neutralized product of the esterified product that had been neutralized in advance and the esterified product were thoroughly mixed with a premixer, and then mixed with an aqueous sodium hydroxide solution to obtain a neutralized product.
(Concentration process)
Furthermore, using the above neutralized product as a raw material surfactant aqueous solution, recycling flash evaporation described in JP-A-2004-210807 is performed, lower alcohol is removed and concentrated, and α-sulfo fatty acid alkyl ester salt-containing composition I got a thing.

A-2:
In a reactor with a capacity of 1 kL with a stirrer, fatty acid methyl ester mixture (methyl palmitate (manufactured by Lion Corporation, trade name: Pastel M-16)) and methyl stearate (manufactured by Lion Corporation, trade name: Pastel M) -180)) was mixed in advance so that the mass ratio was 9: 1) 330 kg was injected, and while stirring, anhydrous sodium sulfate was added as a coloring inhibitor to the fatty acid methyl ester mixture in an amount of 5% by mass. After that, while continuing stirring, 110 kg of SO ₃ gas (sulfonated gas) diluted to 4% by volume with nitrogen gas at a reaction temperature of 80 ° C. (1.2 times mol with respect to the fatty acid methyl ester mixture) was bubbled. However, it was blown at a constant speed over 3 hours. Aging was performed for 30 minutes while maintaining the temperature at 80 ° C.
Thereafter, 14 kg of methanol was supplied as a lower alcohol to carry out esterification. The esterification temperature was 80 ° C. and the aging time was 30 minutes.
Furthermore, the esterified product extracted from the reaction apparatus was continuously neutralized by adding an equivalent amount of aqueous sodium hydroxide solution using a line mixer.
This neutralized product was poured into a bleaching agent mixing line, and 35% hydrogen peroxide water was converted into a pure amount, and an anionic surfactant concentration (α-sulfo fatty acid methyl ester sodium salt and α-sulfo fatty acid disodium salt (di- 1% is supplied to and mixed with the Na salt), and bleaching is performed at 80 ° C. to obtain a paste-like α-SF salt (α-SF-Na).
The α-SF-Na paste obtained above was rotated at a rotation speed of 1,060 rpm and a blade tip speed of about 11 m / s (heat transfer surface: 0.5 m 2, in the cylindrical processing section). Inner diameter: 205 mm, clearance between heat transfer surface and blade tip as scraping means: 3 mm, introduced to trade name “Exeva”, manufactured by Shinko Pantech Co., Ltd. at 35 kg / hr, inner wall heating temperature (heat transfer surface The temperature was 135 ° C. and the degree of vacuum (pressure in the processing section) was 0.007 to 0.014 MPa.
The temperature of the obtained concentrate was 115 ° C., and the water content was 2.5% (solid content mass%).
The obtained concentrate was continuously supplied at 222 kg / h to a double belt type belt cooler (NR3-Lo. Cooler) manufactured by Nippon Belting Co., Ltd. with a clearance between input pulleys adjusted to 2 mm, and cooled. At this time, the belt moving speed is 6 m / s, and the flow rate of the cooling water is 1500 L / h on the upper belt side (cooled by flowing down on the back side of the belt in a countercurrent manner), and 1800 L / h on the lower belt side (on the back side of the belt). The cooling water supply temperature was 20 ° C. The surfactant-containing material sheet discharged from the cooling belt is crushed at a rotation speed of 200 rpm with an attached pulverizer installed near the discharge pulley, and a flaky α-SF-Na solid at 23 ° C. I got a thing.
As the screw extrusion granulator 100 used in A-2, a screw extrusion granulator (manufactured by Hosokawa Micron Co., Ltd., Extrude Ohmic EM-6 type, spindle rotation speed 70 rpm) is used. Referring to FIG. 1, a screw extrusion granulator 100 includes a cylindrical casing 110, a raw material input port 112 provided on the upper upstream side of the casing 110, and an upper downstream side of the raw material input port 112 in the casing 110. A binder inlet 114 provided and a product outlet 118 provided on the downstream side of the casing 110 are provided. A rotatable screw shaft 140 is disposed inside the casing 110. The screw 140 shaft is rotated by rotation of a drive mechanism such as a motor (not shown). Inside the casing 110 of the screw extrusion granulator, there are a fixed claw 130 provided on the downstream side of the binder inlet 114 (not used this time) and a first paddle 144 provided on the downstream side of the fixed claw 130. A second paddle 146 provided on the downstream side of the first paddle 144, an upstream first orifice plate 122, and a downstream second orifice plate 124. The first orifice plate 122 arranged on the side closer to the raw material inlet 112 has an orifice having a hole diameter of 6 mm. The second orifice plate 124 has an orifice having a hole diameter of 4.5 mm. A third orifice plate 126 is provided at the product outlet 118. The hole shape of the third orifice plate 126 used this time is circular, the hole diameter is 0.8 mm, and the hole area is 0.50 mm 2 / piece. The upstream first paddle 144 and the downstream second paddle 146 are fixed to the casing 110. When the screw shaft 140 rotates, the first paddle 144 and the second paddle 146 are rotated together with the screw shaft 140. A jacket 150 is provided outside the casing 110 of the screw extrusion granulator. Water is passed through the jacket 150 at an inlet temperature of 30 ° C.
The obtained flaky α-SF-Na solid was continuously fed at a rate of 80 kg / h from the raw material inlet 112 of the screw extrusion granulator 100 with the raw material inlet 112 opened to the atmosphere. Supplied. The temperature of the flakes at the time of supply is 25 ° C. Then, by rotating the screw shaft 140 and rotating the first paddle 144 and the second paddle 146 at 70 to 160 rpm, the α-SF-Na solid is kneaded and extruded from the hole of the third orifice plate 126, A noodle-like α-SF-Na solid was obtained.
The noodles are cooled to 30 ° C. at room temperature, and then crushed by a pulverizer (Okada Seiko Co., Ltd., speed mill ND-10 type, blade rotation speed 840 rpm, screen φ2 mm at a speed of 1 kg / min. A pellet-shaped α-SF-Na solid (diameter 0.8 mm, length 2.5 mm) was obtained.

<B component>
B-1:
・ Nonionic surfactant: Polyoxyethylene alkyl ether (EO15)
Ethanol oxide average 15-mole adduct of alcohol (trade name; ECOROL26) having an alkyl group having 12 to 16 carbon atoms manufactured by ECOGREEN
B-2:
・ Nonionic surfactant: Polyoxyalkylene alkyl ether (EO7)
Ethanol oxide average 7 mol adduct of alcohol having 12 to 16 carbon atoms (trade name; ECOROL26) manufactured by ECOGREEN

<C component>
A: Daicel Chemical Industries, Ltd., CMC Daicel 1190, molecular weight 820,000, degree of etherification 0.70
B: Nippon Paper Chemicals Co., Ltd., Sunrose F10LC, molecular weight 130,000, degree of etherification 0.60
C: Nippon Paper Chemicals Co., Ltd., Sunrose F350HC, molecular weight 300,000, degree of etherification 0.90
D: manufactured by Daicel Chemical Industries, Ltd., CMC Daicel 1130, molecular weight 300,000, degree of etherification 0.70
E: Daicel Chemical Industries, Ltd., CMC Daicel 1290, molecular weight 990,000, degree of etherification 0.90
F: manufactured by Daicel Chemical Industries, Ltd., CMC Daicel 1380, molecular weight 1.1110,000, degree of etherification 1.25
G: Nippon Paper Chemicals Co., Ltd., Sunrose SLD-F1, molecular weight 300,000, degree of etherification 0.30
H: manufactured by Daicel Chemical Industries, Ltd., CMC Daicel 1140, molecular weight 620,000, degree of etherification 0.70
<C 'component>
The following is carboxymethylcellulose outside the range of “degree of etherification of 0.2 to 1.3 and weight average molecular weight of 100,000 or more” of the present invention.
I: Daicel Chemical Industries, Ltd., CMC Daicel 1105, molecular weight 60,000, degree of etherification 0.70
J: Nippon Paper Chemicals Co., Ltd., Sunrose A200SH, molecular weight 270,000, degree of etherification 1.50
In addition, said molecular weight is a liquid feed pump: Shodex DS-4 (made by Showa Denko), a degasser: ERC3115 (made by ERC company), a column: Shodex SB-806MHQ (made by Showa Denko), a differential refractive index detector as an apparatus. : Shodex RI-71 (manufactured by Showa Denko), eluent: 0.1 M NaNO ₃ , flow rate: 1 ml / min, sample: 0.02 to 0.3% by weight Solvent is 0.1 M NaNO ₃ , injection amount : A value obtained by calculating the weight average molecular weight as a numerical value in terms of PEG under an operating condition of 200 μl.

<Optional component>
LAS-Na: linear alkyl (10 to 14 carbon atoms) benzenesulfonic acid [manufactured by Lion Co., Ltd., Rypon LH-200 (LAS-H pure content 96% by mass)] was prepared during the preparation of the surfactant composition. What mixed the compound neutralized with 48 mass% sodium hydroxide aqueous solution and the compound neutralized with 48 mass% potassium hydroxide aqueous solution instead of neutralizing with the said sodium hydroxide by 2: 1 mass ratio. The compounding quantity in a table | surface shows the value (mass%) as these mixtures.
Soap: Fatty acid sodium having 12 to 18 carbon atoms (manufactured by Lion Corporation, pure content: 67% by mass, titer: 40 to 45 ° C .; fatty acid composition: C12 1% by mass, C14 10% by mass, C16 24% by mass, C18F0 (Stearic acid) 10 mass%, C18F1 (oleic acid) 54 mass%, C18F2 (linoleic acid) 1 mass%).
Enzyme: Sabinase 12T (Novozymes) / LIPEX100T (Novozymes) / Stainzyme 12GTS (Novozymes) = 5/4 (mass ratio).
Zeolite: Powder A-type zeolite (trade name: Shilton B, manufactured by Mizusawa Chemical Co., Ltd .; pure content 80% by mass).
MA agent: acrylic acid / maleic anhydride copolymer sodium salt (trade name: Aqualic TL-400, manufactured by Nippon Shokubai Co., Ltd .; pure 40% by mass aqueous solution).
Sodium sulfate: neutral anhydrous sodium sulfate (manufactured by Nippon Chemical Industry Co., Ltd.)
Sodium carbonate: granular ash (Asahi Glass Co., Ltd. average particle size 320 μm, bulk density 1.07 g / cm 3).
-Sodium sulfite: anhydrous sodium sulfite (manufactured by Shinshu Chemical Co., Ltd.).
Potassium carbonate: potassium carbonate (powder) (Asahi Glass Co., Ltd .; average particle size 490 μm, bulk density 1.30 g / cm 3).
Perfume: Perfume composition A shown in JP-A-2002-146399 [Table 11] to [Table 18].
Fluorescent brightener: Chinopearl CBS-X (trade name, manufactured by Ciba Specialty Chemicals) / Chinopearl AMS-GX (trade name, manufactured by Ciba Specialty Chemicals) = 3/1 (mass ratio).
-Coated sodium carbonate particles: 85% by mass of sodium carbonate, 3% by mass of sodium salt of acrylic acid / maleic anhydride copolymer, 7% by mass of lauric acid, water and other balances prepared in the first to third steps shown below Surface-treated inorganic particles consisting of
(First step)
Sodium carbonate was charged into a plow shear mixer (Daihei Kiko Co., Ltd.) equipped with a blade-shaped shovel and a clearance between the shovel and the wall surface of 5 mm (filling rate: 30% by volume), and stirring was started at a main shaft of 150 rpm ( Chopper rotation speed: 1015 rpm, blade tip speed (peripheral speed): 6.9 m / s). Ten seconds after the start of stirring, an aqueous solution of sodium salt of acrylic acid / maleic anhydride copolymer was sprayed for 180 seconds with a pressure nozzle (flat nozzle) having a spray angle of 115 degrees to perform granulation / coating operation.
In addition, in the particle | grains prepared at the 1st process, when the moisture content with respect to this particle | grain whole quantity exceeds 10 mass%, hot air is introduce | transduced into the said apparatus and it dries, and the moisture content is adjusted to 10 mass% or less. did.
(Second step)
Subsequently, lauric acid was sprayed and added for 180 seconds with a pressure nozzle (full cone nozzle) having a spray angle of 60 degrees, while continuing the stirring of the Proshear mixer. Subsequently, stirring was continued for 30 seconds to obtain particles.
(Third step)
Next, the obtained particles are packed into a fluidized bed (product name: Glatt-POWREX, model number FD-WRT-20, manufactured by Paulex Co., Ltd.), and after filling, 15 ° C. wind (air) is placed in the fluidized bed. The particles were cooled to 20 ° C., and particles were cooled.
The air velocity in the fluidized bed was adjusted in the range of 0.2 to 10.0 m / s while confirming the fluidized state.
The obtained particles were classified using a sieve having an opening of 2000 μm to obtain surface-treated inorganic particles (coated Na carbonate particles) passing through a sieve having an opening of 2000 μm.

[Recontamination evaluation method-1]
Two skin shirts (BVD skin shirt: G0134TS) are distributed to each household as a recontamination determination cloth. One sheet is used for the evaluation composition and the other sheet is used for the control composition (Comparative Example 1). When washing at home, the laundry was carried out together with the actual items to be washed. The test was conducted at 10 homes per sample. Among them, 5 households evaluated the distribution skin shirts after repeated practical washing 20 times with the evaluation composition. After that, after 20 practical washings in the control composition, the distribution skin shirt was evaluated. In the other five households, the control composition was tested first, and then the evaluation composition was tested in order, so that the effects of the amount and quality of stains due to test time deviations were offset and leveled. Laundry at each home was performed using 30 L of washing water and 20 g of the test detergent as a standard for the standard usage amount per 1.5 kg of the cloth to be washed.
The determination of re-contamination is based on the reflectivity of 12 points in total, that is, 6 points of each of the heels 5, 10, 15, 20, 25, and 30 cm along the center line of the ventral surface and the back surface of the collected skin shirt. (Nippon Denshoku Industries Co., Ltd., spectral color difference meter SE2000) was used for measurement and calculation as a Z value. The Z value of each sample was averaged, and the total average Z value at n = 10 households was calculated. The value obtained by subtracting the Z value of the control composition from the Z value of the evaluation composition, ΔZ, was determined to evaluate the recontamination property. When ΔZ is 1 or more, visual identification is possible. The following evaluation criteria were set for re-contamination, and ◎◎, ◎ and ○ were accepted.
[Evaluation criteria]
◎: ΔZ is greater than 3 ◎: ΔZ is greater than 2 and less than 3 ○: ΔZ is greater than 1 and less than 2 Δ: ΔZ is greater than 0 and less than 1 x: ΔZ is less than 0

[Recontamination evaluation method-2]
Five sheets of skin shirt (BVD skin shirt: 100% cotton, G0134TS) cut into 5 × 5 cm were prepared as the re-contamination determination cloth.
<Washing>
Using a round tester (FI-301, manufactured by Tester Sangyo Co., Ltd.), 200 mL of a 0.15% detergent solution adjusted with 3 ° DH hard water at 25 ° C. was placed in a stainless steel sample bottle (500 ± 50 mL). 5 re-contamination determination cloths, wet artificial contamination cloth (made by Laundry Science Association, oleic acid 28.3%, triolein 15.6%, cholesterol oleate 12.2%, liquid paraffin 2.5%, squalene 2.5%, cholesterol 1.6%, gelatin 20 sheets of 7.0%, mud 29.8%, carbon black 0.5%), and the skin shirt cut finely (about 3 × 3 cm) were put in, the bath ratio was adjusted to 10 times, and washed at 40 rpm at 25 ° C. for 25 minutes.
<Rinse>
The washed cloth was dehydrated for 1 minute, returned to a sample bottle containing 200 mL of 3 ° DH hard water at 25 ° C., and rinsed at 40 rpm at 25 ° C. for 3 minutes. This rinsing process was repeated twice.
<Dry>
The rinsed cloth was dehydrated for 1 minute, and then only the recontamination determination cloth was taken out and sandwiched between filter papers and dried with an iron.
This washing-rinsing-drying process is repeated three times, and the reflectance of the re-contamination determination cloth is measured using a reflectance meter (Nippon Denshoku Industries Co., Ltd., spectral color difference meter SE2000) and calculated as a Z value. A value obtained by subtracting the Z value after washing from the Z value, ΔZ, was obtained, and the recontamination property was evaluated from the average value of the five sheets.
[Evaluation criteria]
◎: ΔZ is 6 or less ◎: ΔZ is greater than 6 and 8 or less ○: ΔZ is greater than 8 and 10 or less Δ: ΔZ is greater than 10 and 12 or less ×: ΔZ is 12 or more

It is sectional drawing which shows schematic structure of the screw extrusion granulator used in the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Screw extrusion granulator 110 Casing 112 Raw material inlet 114 Binder inlet 118 Product outlet 122 1st orifice plate 124 2nd orifice plate 126 3rd orifice plate 130 Fixed claw 140 Screw shaft 144 1st paddle 146 2nd paddle 150 Jacket

Claims (4)

(A) α-sulfo fatty acid alkyl ester salt,
(B) a polyoxyalkylene alkyl ether or a polyoxyalkylene alkenyl ether obtained by adding an average of 5 to 20 moles of an alkylene oxide having 2 to 4 carbon atoms to an aliphatic alcohol having 12 to 16 carbon atoms , and
(C) A granular detergent composition comprising carboxymethylcellulose or a salt thereof having a degree of etherification of 0.2 to 1.3 and a weight average molecular weight of 300,000 or more . Based on the total composition, component (A) of α- sulfofatty acid alkyl ester salt 5% by mass or more, and includes a nonionic surfactant component (B) 2% by mass or more, according to claim 1 Symbol placing granular Detergent composition. The granular detergent composition of Claim 1 or 2 whose mass ratio of a component (A) / component (B) is 2.0-3.0. The granular detergent composition according to any one of claims 1 to 3, further comprising an organic builder.

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