JPH08333592A - Antibacterial lubricant composition - Google Patents

Abstract

PURPOSE: To obtain an antibacterial lubricant composition combinedly having lubricity comparable with a fatty acid soap and excellent antibacterial activity, and useful in a bottle-filling or a can-filling process in a food factory. CONSTITUTION: This antibacterial lubricant composition is composed of (A) an anionic surfactant of a general formula: RO(AO)n (CH2 )m COOX (R is an 8-22C linear or branched alkyl group or alkynyl group; A is a 2-4C alkylene group; (n) is an integer of 1-20; (m) is 1 or 2; X is H, a metal salt or an amine salt) and (B) a cationic surfactant having antibacterial property and/or an amphoteric surfactant having antibacterial property.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an antibacterial lubricant composition. More specifically, it relates to an antibacterial lubricant composition used in a bottle manufacturing process and a canning manufacturing process in a food factory.

[0002]

2. Description of the Related Art In a bottling and canning manufacturing process of a food factory (washing bottle → filling → capping → case filling), a conveyor belt is used to send a container to each process,
Lubricants are used to facilitate transportation. Recently, in order to manage reasonably and economically, a method in which a concentrated lubricant is collectively diluted by an automatic supply device and a lubricant diluted solution is sent to each conveyor by a pipeline and is jetted and supplied from a nozzle has become widespread. Further, in the process of filling the food, spillage of the food and harmful microorganisms may be propagated by using the lubricant diluent as a nutrient, and therefore, a lubricant having excellent antibacterial properties is desired. Conventionally, as this type of lubricant, an antibacterial lubricant prepared by blending a saturated or unsaturated fatty acid soap having 8 to 22 carbon atoms, a cationic surfactant having bactericidal properties, and an amide compound (JP-A-1-96294). However, further performance improvement is required.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to obtain an antibacterial lubricant composition having both the lubricity comparable to that of fatty acid soap and the excellent antibacterial activity.

[0004]

Means for Solving the Problems As a result of intensive studies to achieve the above-mentioned objects, the present inventors have found that the present invention is an antibacterial lubricant composition having both the lubricity comparable to fatty acid soap and the excellent antibacterial activity. The invention was reached.

That is, the present invention comprises an anionic surfactant (A) represented by the general formula (1), a cationic surfactant (B1) having antibacterial properties and / or an amphoteric surfactant (B2) having antibacterial properties. The antibacterial lubricant composition is characterized in that Formula _{RO (AO) n (CH 2} ) m COOX (1) ( wherein, R represents a linear or branched alkyl or alkenyl group having 8 to 22 carbon atoms, A is from 2 to 4 carbon atoms An alkylene group, n is an integer of 1 to 20, m is 1 or 2,
X is H, a metal salt, or an amine salt. )

In the general formula (1), R is octyl group, 2-ethylhexyl group, decyl group, lauryl group,
Examples thereof include a myristyl group, a palmityl group, a stearyl group, an oleyl group, a coconut oil alkyl group, a beef tallow alkyl group, and an olive oil alkyl group. Of these, preferred are lauryl group, myristyl group, palmityl group, stearyl group,
It is an oleyl group. In the general formula (1), examples of A include an ethylene group, a propylene group, and a butylene group.
Of these, the ethylene group is preferred. n is 1
It is an integer of -20, but is preferably an integer of 2-8. m is 1 or 2, and preferably 1. Examples of X include alkali metal salts such as H, sodium and potassium, alkaline earth metal salts such as magnesium and calcium, amine salts such as monoethanolamine, diethanolamine, cyclohexylamine, morpholine, diethylamine, triethylamine and aniline.
Of these, preferred are sodium, potassium, monoethanolamine, diethanolamine and cyclohexylamine. Specific examples of (A) include carboxylated polyoxyethylene lauryl ether sodium salt,
Examples thereof include carboxylated polyoxyethylene coconut oil alkyl ether potassium salt and carboxylated polyoxyethylene oleyl ether potassium salt.

Examples of (B1) include alkyl trimethyl ammonium salts, dialkyl dimethyl ammonium salts, and alkyl dimethyl benzyl ammonium salts, and these can be used alone or in admixture of two or more. Among these, a preferable compound is a dialkyl (having 6 to 16 carbon atoms) dimethylammonium salt, and more specifically, a didecyldimethylammonium salt.

Examples of (B2) include alkyldiaminoethylglycine salts and polyalkylpolyaminoethylglycine salts. Among these, preferred compounds are alkyl (C6-18) diaminoethylglycine salts, and more specifically, coconut oil alkyldiaminoethylglycine sodium salt.

The amount of each component in the composition of the present invention is as follows on a weight basis. (A) is (A), (B
1), usually 30 to 95 based on the total weight of (B2)
%, Preferably 50 to 90% by weight. 30
If it is less than wt%, the lubricity is insufficient, and if it exceeds 95 wt%, the antibacterial property is lowered. (B1) and / or (B
The total amount of 2) is usually 5 to 70% by weight, preferably 10 to 10% by weight based on the total weight of (A), (B1) and (B2).
50% by weight is blended. If it is less than 5% by weight, the antibacterial activity is insufficient, and if it exceeds 70% by weight, the lubricity is deteriorated.

The antibacterial lubricant composition of the present invention provides amine (C1) and / or amine compound alkylene oxide adduct (C
It is desirable to add 0) to 40% by weight based on the weight of the composition. Examples of (C1) include hexylamine, octylamine, diisopropylamine, tributylamine, cyclohexylamine, dicyclohexylamine,
Examples thereof include morpholine, dibenzylamine, monoethanolamine, diethanolamine and triethanolamine. Of these, preferred is cyclohexylamine, dicyclohexylamine, morpholine, monoethanolamine, diethanolamine or triethanolamine. Hexylamine as (C2),
Examples include octylamine, diisopropylamine, cyclohexylamine, dicyclohexylamine, morpholine, and benzyl oxide of 1 to 4 mol of alkylene oxide. Among these, preferred compounds are 1 to 4 mol adducts of ethylene oxide with cyclohexylamine, dicyclohexylamine, morpholine and octylamine.

The amount of (C1) and / or (C2) is usually 0.1 to 40% by weight, preferably 1 to 20% by weight, based on the weight of the composition. If it is less than 0.1%, the rust preventive property is insufficient, and if it exceeds 40% by weight, the rust preventive power is not improved.

The antibacterial lubricant composition of the present invention is preferably prepared in advance as a 10 to 40% by weight solution with a solvent such as water or alcohol, and usually an aqueous solution. In this case, it is usually diluted 100 to 1000 times before use.

[0013]

The present invention will be further described with reference to the following examples, but the present invention is not limited thereto. The numbers in the examples indicate% by weight. The compositions of Examples 1 to 3 and Comparative Examples 1 to 3 are shown in Table 1.

[0014]

[Table 1] _{a1: C 12 H 25 O (} CH 2 CH 2 O) 3 CH 2 COONa a2: C 18 H 35 O (CH 2 CH 2 O) 3 CH 2 COOK a3: C 17 H 33 COOK b1: didecyl dimethyl ammonium chloride b2: sodium lauryl diaminoethylglycine b3: coconut oil alkyldimethylbenzylammonium chloride c1: bis (2-hydroxyethyl) cyclohexylamine c2: C ₁₂ H ₂₅ O (CH ₂ CH ₂ O) ₉ H

Evaluation The compositions of Examples and Comparative Examples were evaluated for lubricity, antibacterial property and rustproof property. Table 2 shows the evaluation results. The evaluation method is as follows. Lubrication: Vibration friction wear tester (manufactured by Optimol)
The friction coefficient was measured under the following conditions. Load 20 Newtons Temperature 25 ° C Time 10 minutes Vibration frequency 50Hz Vibration width 2mm Antibacterial property; Maximum growth-inhibiting dilution factor that does not allow bacteria to grow is "Academic friend research, Microbiology practice, University of Tokyo"
The minimum inhibitory concentration was measured according to (The higher the dilution ratio, the more antibacterial.) Rust-preventing property: The steel sheet was immersed in a 500-fold diluted solution for 24 hours and a half, and the occurrence of rust was visually determined. (○: No rust, ×
(There is rust)

[0016]

[Table 2]

As can be seen from Table 2, the compositions of the present invention (Examples 1 to 3) have lubricity comparable to that of fatty acid soap (Comparative Example 1) and have antibacterial properties comparable to those of antibacterial cationic surfactants. Have. In addition, it has better lubricity and antibacterial properties than the composition of fatty acid soap and antibacterial cationic surfactant (Comparative Example 3).

[0018]

The composition of the present invention has the following effects. (1) It has the same excellent lubricity as fatty acid soap. (2) It has excellent antibacterial properties that prevent the growth of bacteria at the concentrations used. (3) Rust does not occur. (4) It has more excellent cleaning properties. Because of the above effects, the composition of the present invention is useful as an antibacterial lubricant composition used in bottle manufacturing and canning manufacturing processes in food factories.

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Claims (10)

[Claims] 1. An anionic surfactant (A) represented by the general formula (1) and a cationic surfactant (B) having antibacterial properties.
1) and / or an amphoteric surfactant having antibacterial properties (B
2) An antibacterial lubricant composition comprising: Formula _{RO (AO) n (CH 2} ) m COOX (1) ( wherein, R represents a linear or branched alkyl or alkenyl group having 8 to 22 carbon atoms, A is from 2 to 4 carbon atoms An alkylene group, n is an integer of 1 to 20, m is 1 or 2,
X is H, a metal salt, or an amine salt. ) 2. 30 to 95% by weight of (A) based on the total weight of (A), (B1) and (B2), (B1)
The composition according to claim 1, wherein + (B2) is 5 to 70% by weight. 3. The composition according to claim 1, wherein A in the general formula (1) is an ethylene group. 4. The composition according to claim 1, wherein n is 2 to 8 in the general formula (1). 5. The composition according to claim 1, wherein X in the general formula (1) is an alkali metal salt or an amine salt. 6. (B1) is dialkyl (having 6 to 1 carbon atoms)
6) The composition according to any one of claims 1 to 5, which is a dimethylammonium salt. 7. (B2) is alkyl (having 6 to 1 carbon atoms)
8) The composition according to any one of claims 1 to 5, which is a diaminoethylglycine salt. 8. Further, based on the weight of the composition, the amine (C
1) and / or 0-40 wt% of an amine compound alkylene oxide adduct (C2) is contained, The antibacterial lubricant composition according to any one of claims 1 to 7. 9. The composition according to claim 8, wherein (C1) is cyclohexylamine, dicyclohexylamine, morpholine, monoethanolamine, diethanolamine or triethanolamine. 10. The composition according to claim 8, wherein (C2) is a 1 to 4 mol adduct of ethylene oxide with cyclohexylamine, dicyclohexylamine, morpholine or octylamine.