JP2009073926A - Detergent composition for cip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a one-pack type detergent composition for CIP (cleaning in place) suppressing foaming, removing residual flavor in a good efficiency, almost without having the remaining smell of a base agent derived from the detergent composition for CIP after the cleaning, and excellent in storage stability. <P>SOLUTION: The detergent composition for CIP contains (A) one or more solvents selected from the group consisting of ester compounds, silicone compounds and hydrocarbons having a 6 to 9 SP (solubility parameter) value at 25°C, (B) a surfactant other than a component (C), (C) a specific monoglyceryl ether compound expressed by general formula (1): R-OCH<SB>2</SB>CH(OH)CH<SB>2</SB>OH (wherein R is a 6-14C straight or branched chain alkyl or alkenyl), (D) a 10-18C aliphatic alcohol, and (E) a specific monoglycol ether compound expressed by general formula (2): R-O(AO)H (wherein R is a 1-8C straight or branched hydrocarbon; and AO is a 2-4C alkylene oxide) in a specific range, respectively. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a CIP cleaning composition and a CIP cleaning method. Specifically, the present invention relates to a cleaning composition for CIP used for cleaning manufacturing equipment and manufacturing equipment such as food and beverage factories, and a CIP cleaning method.

  In food factories, beverage factories, etc., production facilities and equipment are cleaned at the time of production / product type switching or at the end of operation, but CIP cleaning (fixed cleaning) is used for places where piping and tanks are difficult to clean. )It is carried out. This CIP cleaning is a method of cleaning by flowing a cleaning agent without disassembling the device with the word “cleaning in place”.

  CIP cleaning is widely used in food factories and beverage factories. Above all, in the beverage factory, when switching production varieties, etc., it is thoroughly washed so that the previous filling does not remain on the production line and the flavor mixed in the previous filling is not mixed into the next filling. Things are important. For this reason, CIP cleaning is carried out over time in food factories, etc., especially in the production line, because the flavor tends to remain in the packing part (seal part) such as the pipe connection part, in order to sufficiently remove the flavor. Takes a lot of effort.

  In recent years, the frequency of switching has increased due to an increase in production speed and an increase in beverage varieties, and time loss in the CIP process has caused a significant decrease in productivity. Conventionally, in CIP cleaning, alkali cleaning, acid cleaning, and cleaning using a combination of these in accordance with dirt in the piping of manufacturing equipment and manufacturing equipment are appropriately performed. In some cases, oxidizing agents such as acid salts, isocyanurates, percarbonates, and perborates are used. However, a sufficient deodorizing effect is still not obtained, and damage to the device may occur depending on the use situation.

  Under such circumstances, techniques for further improving the cleaning efficiency and flavor removal effect in CIP cleaning have been proposed. For example, Patent Document 1 discloses a cleaning technique using a specific solvent and a surfactant. Patent Document 2 discloses a cleaning technique using a specific alcohol compound and a surfactant.

On the other hand, Patent Document 3 discloses a technique for cleaning precision parts using cyclic saturated hydrocarbons, aliphatic alcohols and surfactants, and Patent Document 4 discloses a hydrocarbon fraction having a boiling point of 150 to 240 ° C., a specific compound, a surface activity. Printed circuit board cleaning technology using chemicals, Patent Document 5 discloses cyclic saturated hydrocarbons, specific compounds, surfactants, enzyme precision parts cleaning technology, etc., and Reference 6 describes hydrocarbon fractions having boiling points of 150-240 ° C. Further, cleaning technology for industrial products using specific compounds and surfactants, and Patent Document 7 disclose cleaning technology using nonionic surfactants and organic solvents with extremely low water solubility.
Japanese Patent Laying-Open No. 2005-200467 JP 2005-314484 A Japanese Patent Laid-Open No. 3-62896 Japanese Patent Laid-Open No. 5-98292 Japanese Patent Laid-Open No. 5-98294 Japanese Patent Laid-Open No. 5-98480 JP-T-2002-514258

  However, in the techniques of Patent Documents 1 and 2, the flavor removal effect is sufficient, but depending on the CIP equipment, foaming may occur, leading to the stoppage of liquid feeding due to the foaming of the liquid feeding pump, which hinders operation. There is. Further, the techniques of Patent Documents 3 to 7 are not suitable for food factories due to problems such as residual base and residual odor.

  In view of the above situation, the object of the present invention is to suppress foaming and efficiently remove the remaining flavor in the currently performed CIP process, and the base odor derived from the CIP cleaning composition hardly remains after cleaning. Another object of the present invention is to provide a one-part type cleaning composition for CIP and a CIP cleaning method having good storage stability.

The present invention is an ester compound, a silicone compound, and one or more solvents (A) selected from the group consisting of hydrocarbons having an SP value at 25 ° C. of 6 to 9, except for the component (C). Surfactant (B) 0.5 to 20% by weight, compound (C) 0.5 to 20% by weight represented by the following general formula (1), aliphatic alcohol (D) 0 having 10 to 18 carbon atoms The present invention relates to a cleaning composition for CIP containing 0.05 to 20% by weight and 0.5 to 20% by weight of the compound (E) represented by the following general formula (2).
R—OCH ₂ CH (OH) CH ₂ OH (1)
(In the formula, R represents a linear or branched alkyl group having 6 to 14 carbon atoms or a linear or branched alkenyl group having 6 to 14 carbon atoms.)
R-O (AO) H (2)
(In the formula, R represents a linear or branched hydrocarbon group having 1 to 8 carbon atoms, and AO represents an alkyleneoxy group having 2 to 4 carbon atoms.)

  In addition, the present invention provides at least one solvent (A) selected from the group consisting of an ester compound, a silicone compound, and a hydrocarbon having an SP value at 25 ° C. of 6 to 9 (hereinafter referred to as “component (A)”). 0.01 to 5% by weight, surfactant (B) other than component (C) (hereinafter referred to as component (B)) 0.001 to 2% by weight, compound represented by the above general formula (1) (C ) [Hereinafter referred to as component (C)] 0.001 to 2% by weight, aliphatic alcohol having 8 to 20 carbon atoms (D) [hereinafter referred to as component (D)] 0.0001 to 2% by weight, and the above general The present invention relates to a CIP cleaning method including a step (1) of bringing a cleaning medium (I) containing 0.001 to 2% by weight of a compound (E) represented by the formula (2) into contact with an object to be cleaned.

  According to the present invention, in CIP cleaning, foaming can be suppressed and flavor can be efficiently removed, and even after cleaning, there is almost no base odor derived from the cleaning composition for CIP, and the cleaning time can be shortened compared to the prior art. . In addition, a one-component CIP cleaning composition having excellent storage stability can be obtained. The present invention is particularly suitable for washing food industry plants.

<(A) component>
Of the component (A) of the present invention, the hydrocarbon has an SP value of 6 to 9 at 25 ° C. The SP value is a solubility parameter δ [(cal / cc) ^1/2 ] that is generally used as a measure of compatibility between substances. As the component (A) of the present invention, the deodorizing property (odor removal performance) ), The SP value at 25 ° C. is 6 to 9, preferably 7 to 8.5, and particularly preferably 7 to 8. As (A) component of this invention, a melting | fusing point is 100 degrees C or less from a deodorizing viewpoint, and 80 degrees C or less is more preferable. In particular, 65 ° C. or lower is preferable.

  As (A) component of this invention, a C5-C24 hydrocarbon compound is preferable. Examples of the hydrocarbon compound include aliphatic hydrocarbons and aromatic hydrocarbons, but from the viewpoint of base odor and detergency, aliphatic hydrocarbons having 5 to 20 carbon atoms are more preferable, and those having 8 to 14 carbon atoms. More preferred are aliphatic hydrocarbons. In particular, an aliphatic hydrocarbon having 10 to 14 carbon atoms is preferable. As the component (A), specifically, pentane, hexane, cyclohexane, heptane, octane, nonane, decane, undecane, dodecane, tridecane, tetradecane, pentadecane, hexadecane, heptadecane, octadecane, nonadecane, C10-α-olefin, C12-α-olefin, C14-α-olefin and the like can be mentioned, and decane, undecane, dodecane, tridecane, tetradecane, C12-α-olefin and the like are preferable. Examples of the aromatic hydrocarbon include alkyl (preferably having 1 to 18 carbon atoms) substituted benzene such as dodecylbenzene.

  Moreover, among (A) component, as an ester compound, a C1-C22 fatty acid or a C2-C22 divalent carboxylic acid and a C1-C22 alcohol (monohydric alcohol or polyhydric alcohol) and Specific examples include octyl stearate, oleyl oleate, methyl oleate, octyldodecyl myristate, dioctyl adipate, dioctyl phthalate, rapeseed oil, soybean oil, olive oil, triacetin and the like.

  Among the components (A), examples of the silicone compound include polydimethylsiloxane, polyether-modified silicone, cyclic silicone oil, amino-modified silicone, and alkyl-modified silicone.

<(B) component>
Examples of the component (B) include nonionic surfactants, anionic surfactants, amphoteric surfactants and cationic surfactants, and emulsification of the components (A), (C) and (D). From the viewpoint of assisting dispersibility, one or more selected from the group consisting of a nonionic surfactant and an anionic surfactant is preferred, and a combination of a nonionic surfactant and an anionic surfactant is particularly preferred.

  Nonionic surfactants include polyoxyalkylene alkyl ether, polyoxyalkylene alkylamine, polyoxyalkylene fatty acid ester, alkyl polyglycoside, glycerin fatty acid ester, polyglycerin fatty acid ester, sucrose fatty acid ester, polyoxyethylene-polyoxy Propylene block polymer, polyoxyalkylene polyhydric alcohol fatty acid ester and the like can be mentioned, but polyoxyalkylene fatty acid ester, alkyl polyglycoside, polyoxyalkylene alkyl ether, polyoxyalkylene alkylamine, polyoxyalkylene polyhydric alcohol fatty acid ester are preferable. (Polyoxyalkylene sorbitan fatty acid ester, polyethylene glycol fatty acid ester, etc.) and the like. In these nonionic surfactants, the polyoxyalkylene is preferably polyoxyethylene, polyoxypropylene and a mixture thereof, and the alkyl group preferably has 8 to 18 carbon atoms and can be changed to an alkenyl group. The number of carbon atoms of the fatty acid is preferably 8-18. A nonionic surfactant can be used individually or in combination of 2 or more types.

  Nonionic surfactants, particularly polyoxyalkylene alkyl ethers, preferably have an HLB value of 3 or more and less than 8 according to the Griffin calculation formula.

  Examples of the anionic surfactant include fatty acid salts (preferably having 8 to 24 carbon atoms), alkyl (preferably having 8 to 24 carbon atoms) sulfonate, alkyl (preferably having 8 to 18 carbon atoms) benzenesulfonate, alkyl (Preferably C8-24) sulfate, alkyl (preferably C2-24) phosphate ester salt, polyoxyalkylene (preferably polyoxyethylene) alkyl (preferably C8-18) ether sulfate , Polyoxyalkylene (preferably polyoxyethylene) alkyl (preferably 2 to 24 carbon atoms) phosphate ester salt, polyoxyalkylene (preferably polyoxyethylene) alkyl (preferably 8 to 18 carbon atoms) carboxylate salt, Examples include alkyl (preferably having 6 to 18 carbon atoms) sulfosuccinate.

  Examples of the amphoteric surfactant include alkyl (preferably 8 to 18 carbon atoms) amine oxide, alkyl (preferably 8 to 18 carbon atoms) dimethylaminoacetic acid betaine, alkyl (preferably 8 to 18 carbon atoms) amidopropyl betaine, alkyl (Preferably having 8 to 18 carbon atoms) Hydroxysulfobetaine, alkyl (preferably having 8 to 18 carbon atoms) carboxymethylhydroxyethyl imidazolinium betaine and the like can be mentioned.

  Examples of the cationic surfactant include alkyl chloride (preferably having 6 to 24 carbon atoms) trimethylammonium, dialkyl chloride (preferably having 6 to 18 carbon atoms) dimethyl ammonium, benzalkonium chloride (preferably having 6 to 18 carbon atoms) and the like. Is mentioned.

<(C) component>
Component (C) is a glyceryl ether having a linear or branched alkyl group having 6 to 14 carbon atoms or a linear or branched alkenyl group having 6 to 14 carbon atoms as the substituent R in the general formula. is there. The substituent R of the glyceryl ether of component (C) is preferably a linear or branched alkyl group having 6 to 14 carbon atoms, more preferably a linear or branched alkyl group having 8 to 12 carbon atoms, particularly carbon. A linear or branched alkyl group of several 8 to 10 is preferable. Specific examples of the component (C) include 2-ethylhexyl glyceryl ether, decyl glyceryl ether, isodecyl glyceryl ether, dodecyl glyceryl ether, octyl glyceryl ether, and isostearyl glyceryl ether, and preferably 2-ethylhexyl glyceryl ether. Examples include ether, decyl glyceryl ether, isodecyl glyceryl ether, dodecyl glyceryl ether and the like, and 2-ethylhexyl glyceryl ether and isodecyl glyceryl ether are particularly preferable.

<(D) component>
(D) As a component, a C10-C18 linear or branched saturated or unsaturated alcohol is mentioned, A C10-C18 linear or branched saturated alcohol is preferable. As the component (D), specifically, 1-decanol, 2-decanol, 9-decen-1-ol, 1-undecanol, 2-undecanol, 10-undecen-1-ol, 1-dodecanol, 2- Dodecanol, 2-butyl-1-octanol, 1-tridecanol, 2-tridecen-1-ol, 1-tetradecanol, 2-tetradecanol, 11-tetradecen-1-ol, 1-hexadecanol, 2- Examples include hexadecanol, 2-hexyl-1-decanol, 1-heptadecanol, and 1-octadecanol. From the viewpoint of base odor and foam suppression, the alcohol preferably has 12 to 18 carbon atoms.

<(E) component>
The substituent R in the general formula (2) of the component (E) is a linear or branched hydrocarbon group having 1 to 8 carbon atoms, a linear or branched alkyl group having 1 to 8 carbon atoms, or A linear or branched alkenyl group having 3 to 8 carbon atoms is preferred. The substituent R in the general formula (2) is preferably a linear or branched alkyl group having 1 to 6 carbon atoms, more preferably a linear or branched alkyl group having 1 to 4 carbon atoms, particularly the carbon number. 2 to 4 linear or branched alkyl groups are preferred. Moreover, AO in General formula (2) is a C2-C4, Preferably it is C2-C3 alkyleneoxy group.

  Specific examples of the component (E) include ethylene glycol monomethyl ether, ethylene glycol monobutyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monoisobutyl ether, ethylene glycol monohexyl ether, ethylene glycol mono 2-ethylhexyl ether, ethylene glycol Examples include monoallyl ether, ethylene glycol monophenyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, and propylene glycol monophenyl ether. From the viewpoint of storage stability, ethylene glycol monobutyl ether and propylene glycol monopropyl ether are preferred.

<CIP cleaning composition>
In the CIP cleaning composition of the present invention, the component (A) is 5 to 50% by weight, preferably 10 to 30% by weight, more preferably 10 to 25% by weight, from the viewpoint of foam suppression and deodorizing properties of the composition. %contains. Further, the component (B) is contained in an amount of 0.5 to 20% by weight, preferably 1 to 15% by weight, more preferably 3 to 10% by weight. Moreover, (C) component is 0.5-20 weight%, Preferably it is 1-15 weight%, More preferably, 3-10 weight% is contained. Moreover, (D) component is 0.05-20 weight%, Preferably it is 0.1-15 weight%, More preferably, 0.3-10 weight% is contained. Moreover, (E) component is 0.5-20 weight%, Preferably it is 1-15 weight%, More preferably, 3-10 weight% is contained. The CIP cleaning composition of the present invention may or may not contain water, but from the viewpoint of handling, water is preferably 1 to 98% by weight, more preferably 10 to 90% by weight, and still more preferably. It is contained in an amount of 20 to 70% by weight, particularly preferably 30 to 65% by weight. In addition, the CIP cleaning composition of the present invention is used in the form of a composition in which the component (A), the component (B), the component (C), the component (D), and the component (E) are mixed, You may mix and use each component separately at the time of use.

  In the CIP cleaning composition of the present invention, from the viewpoint of foam suppression, the weight ratio (B) / [(C) + (D) of the component (B) and the sum of the components (C) and (D) )] Is preferably 3 or less, more preferably 2.5 to 0.5, and particularly preferably 2.0 to 1.0.

  In the CIP cleaning composition of the present invention, from the viewpoint of storage stability, the weight ratio (E) / (D) of the component (D) to the component (E) is preferably 1 to 1000, more preferably. 50-500, More preferably, it is 100-300.

  In the present invention, the component (A) is an aliphatic hydrocarbon having 10 to 14 carbon atoms, the component (B) is an alkyl polyglycoside (specifically, decyl glucoside, undecyl glucoside, lauryl glucoside, tetraglucoside, etc.), polyoxy Alkylene fatty acid esters (specifically, polyoxyethylene oleic acid ester, polyoxyethylene lauric acid ester, etc.), polyoxyalkylene alkyl ethers having an HLB of 3 or more and less than 8, and polyoxyalkylene alkyl amines (specifically, polyoxyalkylene esters) Ethylene lauryl amine, polyoxyethylene stearyl amine, etc.), alkyl sulfates (specifically sodium lauryl sulfate, etc.), polyoxyalkylene alkyl ether sulfates (specifically sodium polyoxyethylene lauryl ether sulfate, etc.) (C) C14-C14 alkyl glyceryl ether (specifically, 2-ethylhexyl glyceryl ether, decyl glyceryl ether, isodecyl glyceryl ether, dodecyl glyceryl ether, etc.), (D) component Is a combination of alcohol having 12 to 18 carbon atoms and (E) component being ethylene glycol monobutyl ether and / or propylene glycol monopropyl ether in terms of foam suppression, deodorization, base odor, and storage stability. preferable.

  In addition to the (A) component, the (B) component, the (C) component, and the (D) component, the CIP cleaning composition of the present invention includes a rust preventive, preservative, chelating agent, (E ) A water-soluble solvent other than the component, a pH adjuster and the like can be added and used.

  The cleaning composition for CIP of the present invention is used for CIP cleaning as a cleaning solution diluted with a non-aqueous solvent, an aqueous solvent, water or the like. The dilution medium is preferably water from the viewpoint of economy and safety. In the diluted cleaning solution, the concentration of the component (A) is 0.01 to 5% by weight, more preferably 0.05 to 2.5% by weight, particularly 0.1 to 2.5% by weight, from the viewpoints of detergency and economy. % Is preferred. Further, from the viewpoint of emulsifying dispersibility of the component (A) and the component (C), the concentration of the component (B) in the cleaning liquid is 0.001 to 2% by weight, further 0.005 to 1% by weight, particularly 0.01. It is preferably ˜1% by weight. The concentration of component (C) is preferably 0.001 to 2% by weight, more preferably 0.005 to 1% by weight, and particularly preferably 0.01 to 1% by weight. Further, the concentration of component (D) is 0.0001 to 2% by weight, more preferably 0.0005 to 1% by weight, particularly 0.001 to 1% by weight, and the concentration of component (E) is 0.001 to 2% by weight. Further, it is preferably 0.005 to 1% by weight, particularly 0.01 to 1% by weight.

<CIP cleaning method>
As described above, the CIP cleaning composition of the present invention is preferably used as a diluted cleaning liquid for CIP cleaning. The cleaning liquid is preferably circulated and cleaned in a range of 10 ° C. to 98 ° C. so as to come into contact with the piping and various devices that are the objects to be cleaned in CIP cleaning. The temperature of the cleaning liquid is particularly preferably 40 to 98 ° C, and more preferably 60 to 98 ° C. Further, the flow rate of the cleaning liquid flowing in the pipe is preferably 0.5 to 5 m / second, and more preferably 1 to 3 m / second.

  In the present invention, the cleaning medium (I) containing the component (A), the component (B), the component (C), the component (D), and the component (E) is brought into contact with the object to be cleaned (1). A CIP cleaning method can be performed. As the component (A), the component (B), the component (C), the component (D), and the component (E), those described above are used. After completion of a series of CIP cleaning including cleaning with the cleaning medium (I), sensory evaluation of rinsing water is performed, and if the residual odor is strong, CIP cleaning is repeated again until the odor level is sufficiently lowered, or hot water washing is performed. continue.

  In this case, the medium (I) is preferably a cleaning liquid obtained by diluting the cleaning composition of the present invention. In the medium (I), the concentration of the component (A) is 0.01 to 5% by weight, more preferably 0.05 to 2.5% by weight, particularly 0.1 to 2.5% by weight, and the concentration of the component (B) is 0.001 to 2 wt%, further 0.005 to 1 wt%, particularly 0.01 to 1 wt%, the concentration of component (C) is 0.001 to 2 wt%, further 0.005 to 1 wt%, In particular, 0.01 to 1% by weight, the concentration of component (D) is 0.0001 to 2% by weight, more preferably 0.0005 to 1% by weight, particularly 0.001 to 1% by weight, and the concentration of component (E) is 0. 0.001 to 2% by weight, 0.005 to 1% by weight, particularly 0.01 to 1% by weight, (A) component, (B) component, (C) component, (D) component, and (D) component Is preferably from 0.05 to 5% by weight, more preferably from 0.25 to 2.5% by weight, particularly preferably from 0.5 to 2.5% by weight, from the viewpoints of economy and deodorization.

  The component (B) used in the step (1) is preferably at least one selected from the group consisting of a nonionic surfactant and an anionic surfactant. As the nonionic surfactant and the anionic surfactant, those described above are preferably used.

  For example, CIP washing in a beverage plant is performed by (a) hot water washing → (b) alkali washing → (c) hot water washing → (d) acid washing → (e) hot water washing. Later, if necessary, further washing with hypochlorite and hot water may be performed. The step (1) may be performed in any one of such washing steps, specifically, before and / or after any of the steps (a) to (d), or any step. It can be performed with substitution or simultaneously with any step. The step (1) can be performed alone or simultaneously with each step as long as it is between the steps (a) to (e), but considering the total CIP time, simultaneously with any of the steps (a) to (e) Preferably it is done. Further, from the viewpoint of deodorization, it is preferable to carry out simultaneously with the alkali cleaning (b) or the acid cleaning (d). Note that a plurality of steps (1) may be performed.

  Cleaning compositions for CIP were prepared with the compositions shown in Tables 1 and 2. Using these, the flavor odor (deodorizing property), base odor (odor derived from the cleaning composition for CIP), foaming property, and storage stability were tested by the following methods. The results are shown in Tables 1 and 2.

<Test of flavor odor and base odor>
(1) Test object An EPDM (ethylene / propylene / diene / rubber) sheet (Osaka Sanitary Metal Industry Cooperative) made of the same material as the packing was cut into 5 cm × 0.5 cm (thickness 2 mm) to obtain a test piece. A test piece was prepared by immersing the test piece in a commercial beverage (peach natural water: manufactured by JT) at 70 ° C. for 2 hours.

(2) Test method This method is the following cleaning step (b), in which cleaning with the cleaning compositions in Tables 1 and 2 was performed. After putting 12 g of the cleaning compositions in Tables 1 and 2 into a 300 mL beaker, a predetermined amount of NaOH and water were added so that the final NaOH concentration was 2% by weight, and the total was evaluated as 300 g. Thereto, one test piece scented by the above method was put into each beaker, and the following washing steps (a) to (e) were performed. In addition, the washing | cleaning process of (a)-(e) was performed by putting a washing | cleaning liquid or warm water into a 300 mL beaker, and injecting a to-be-tested object sequentially. At that time, in each step, the contents in the beaker were stirred at 80 ° C. with a magnetic stirrer. The test piece after a series of washing steps was dried, transferred to a 50 mL screw tube, and then stored at room temperature for 12 hours as an evaluation sample.

(Washing process)
(A) Hot water washing 1: 80 ° C., 20 minutes immersion stirring (b) Alkaline cleaning: 2 wt% NaOH aqueous solution, 80 ° C., 20 minutes immersion stirring (c) Hot water washing 2: 80 ° C., 20 minutes immersion stirring (d) Acid cleaning: 0.6 wt% HNO ₃ aqueous solution, 20 minutes immersion stirring (e) Hot water washing 3: 80 ° C., 20 minutes immersion stirring

(3) Evaluation method Five-stage evaluation was performed about the flavor odor and base odor of the test piece by two panelists. It can be said that the smaller the score, the better the deodorizing effect. The flavor odor and the base odor were each expressed as an average value of evaluation points by two panelists. Judgment criteria are as follows.

(Evaluation points and criteria)
5: Strong smell 4: Strong smell 3: Slight smell 2: Slight smell 1: No smell

<Foaming test>
(1) Preparation of test solution After putting 12 g of the cleaning composition of Tables 1 and 2 into a 300 mL beaker, respectively, a predetermined amount of NaOH and water were added so that the final concentration of NaOH would be 2% by weight to make a total of 300 g. A test solution was prepared by stirring at 80 ° C. for 20 minutes with a magnetic stirrer.

(2) Test method The apparatus of FIG. 1 was used for the foamability test. The foam tester shown in FIG. 1 has a double pipe structure in which 80 ° C. hot water is circulated through the outer pipe portion (jacket), and the inner pipe portion whose upper part is opened can be kept at 80 ° C. ing. Moreover, the scale of 100 mL increments are recorded on the outer wall of the inner pipe part from 100 to 1100 mL, and the amount of bubbles can be measured by this scale. The capacity of the inner tube part is 1100 ml. 300 g of the above test solution is put into this inner tube part and circulated with a pump at a flow rate of 0.5 mL / min, and the test solution is dropped from a tapered glass tube installed as shown in FIG. The amount of foam was measured. The amount of foam was measured using the upper surface of the liquid before circulation when the test liquid was put in the inner tube as a reference plane. FIG. 2 is an enlarged view of the dropping portion (tapered glass tube) of the test liquid in the apparatus of FIG. 1 and 2 both show an outline.

(3) Evaluation method About the result obtained by the foamability test, the amount of foams was evaluated by the following judgment criteria.
(Criteria for foaming properties)
○: Bubble volume is 200 ml or less (level suitable for practical use)
X: The amount of foam exceeds 200 ml (a level not suitable for practical use)

<Storage stability test>
(1) Test method 50 g of the cleaning composition shown in Tables 1 and 2 is put into a 110 ml screw tube, and stored for 1 day under each temperature condition (−5 ° C., 25 ° C., 50 ° C.). Was judged visually.

(2) Evaluation method The results obtained by the storage stability test were evaluated according to the following criteria.
(Criteria for storage stability)
○: Transparent and uniform (level suitable for practical use)
×: cloudiness or separation (level not suitable for practical use)

* 1: Reagent product (purity 99%), SP value 7.7 at 25 ° C, melting point 20 ° C or less * 2: Reagent product (purity 99%), SP value 7.8 at 25 ° C, melting point 20 ° C or less * 3: Reagent product (purity 99%)
* 4: Reagent product (purity 99%)
* 5 Nonionic surfactant A: Polyethylene glycol fatty acid ester [Emanon 4110, manufactured by Kao Corporation]
* 6 Nonionic surfactant B: alkylpolyglycoside [Maydol 12 manufactured by Kao Corporation]
* 7 Anionic surfactant A: Sodium lauryl sulfate [Eomar 0, manufactured by Kao Corporation]
* 8 Cationic surfactant A: Lauryltrimethylammonium chloride (Kao Co., Ltd., Cotamine 24-P)
* 9 Amphoteric surfactant A: lauryl betaine [manufactured by Kao Corporation, Amphitol 24B]
* 10: Alkyl glyceryl ether [manufactured by Kao Corporation, 2-ethylhexyl glyceryl ether]
* 11: Alkyl glyceryl ether [Isodecyl glyceryl ether, manufactured by Kao Corporation]
* 12: Calcoal 2098, manufactured by Kao Corporation
* 13: Calcoal 8098, manufactured by Kao Corporation
* 14: Reagent product (purity 99%)
* 15: Reagent product (purity 99%)
* 16: Reagent product (purity 99%)
* 17: Ethylene glycol monobutyl ether (Nippon Emulsifier Co., Ltd., butyl glycol)
* 18: Propylene glycol monopropyl ether [Nippon Emulsifier Co., Ltd., propylpropylene glycol]
* 19: Calcole 0898, manufactured by Kao Corporation
* 20: Reagent product (purity 99%)
* 21: Reagent product (purity 99%)
* 22: Reagent product (purity 99%)
* 23: Reagent product (purity 99%)

Schematic diagram of foam tester used for foaming test in Examples FIG. 1 is an enlarged schematic view showing a dropping portion of a test liquid in the foam tester of FIG.

Claims (5)

Surfactant other than one or more solvents (A) selected from the group consisting of ester compounds, silicone compounds, and hydrocarbons having an SP value at 25 ° C. of 6 to 9, and (C) component (B) 0.5 to 20% by weight, compound (C) represented by the following general formula (1) 0.5 to 20% by weight, C10-18 aliphatic alcohol (D) 0.05 to 20 A cleaning composition for CIP containing 0.5% by weight to 20% by weight of a compound (E) represented by the following general formula (2):
R—OCH ₂ CH (OH) CH ₂ OH (1)
(In the formula, R represents a linear or branched alkyl group having 6 to 14 carbon atoms or a linear or branched alkenyl group having 6 to 14 carbon atoms.)
R-O (AO) H (2)
(In the formula, R represents a linear or branched hydrocarbon group having 1 to 8 carbon atoms, and AO represents an alkyleneoxy group having 2 to 4 carbon atoms.)   The CIP cleaning composition according to claim 1, wherein the weight ratio (B) / [(C) + (D)] of the component (B) and the sum of the components (C) and (D) is 3 or less. .   The cleaning composition for CIP according to claim 1 or 2, wherein the component (A) is a hydrocarbon having 5 to 24 carbon atoms having an SP value of 6 to 9 at 25 ° C.   The cleaning composition for CIP according to any one of claims 1 to 3, wherein the component (B) is at least one selected from the group consisting of a nonionic surfactant and an anionic surfactant. One or more solvents selected from the group consisting of ester compounds, silicone compounds, and hydrocarbons having an SP value at 25 ° C. of 6 to 9 (A) 0.01 to 5% by weight, interfaces other than the component (C) Activator (B) 0.001-2 wt%, compound (C) 0.001-2 wt% represented by the following general formula (1), C8-20 aliphatic alcohol (D) 0.0001 CIP cleaning including the step (1) of bringing the cleaning medium (I) containing 0.002 to 2% by weight of the compound (E) represented by the following general formula (2) into contact with the object to be cleaned Method.
R—OCH ₂ CH (OH) CH ₂ OH (1)
(In the formula, R represents a linear or branched alkyl group having 6 to 14 carbon atoms or a linear or branched alkenyl group having 6 to 14 carbon atoms.)
R-O (AO) H (2)
(In the formula, R represents a linear or branched hydrocarbon group having 1 to 8 carbon atoms, and AO represents an alkyleneoxy group having 2 to 4 carbon atoms.)

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