JPH04110400A - Detergent composition - Google Patents

Abstract

PURPOSE:To obtain a detergent composition which does not affect adversely human body and environment, is easy to handle, and is suited to the cleaning of metal working oil by compounding a middle cut with a specific flash point and a kinematic viscosity, a polyoxyethylene alkyl ether nonionic surfactant and an anionic surfactant. CONSTITUTION:50-90wt.% middle cut of a petroleum product (flash point: 100 deg.C or more, kinematic viscosity: 35cSt/40 deg.C), is compounded with 10-50wt.% surfactant component comprising a polyoxyethylene alkyl ether nonionic surfactant (HLB: 5-8) and an anionic surfactant (an ammonium salt, morpholine salt or alkanolamine surfactant: e.g. triethanolamine salt of alkylbenzenesulfonic acid), whereby a detergent composition is obtained.

Description

[Detailed description of the invention] [Industrial application field]

The present invention is easy to handle and CF C], 1.3
or ], 1. The present invention relates to a cleaning composition that can replace 1-1-lichloroethane and the like, particularly a cleaning composition that is excellent in cleaning metalworking oil.

[Conventional technology]

Conventional detergents for metal working oils such as cutting oils, grinding oils, and press oils include alkaline detergents made of alkaline salts and surfactants, chlorofluorocarbon, 1.11
- cleaning with halogenated hydrocarbon solvents such as trichloroethane;
Cleaning with petroleum solvents such as kerosene and alcohol solvents such as inpropyl alcohol have been widely used.

[Problem to be solved by the invention]

However, with such conventional cleaning agents or solvent cleaning, there are concerns about the safety of the body to be cleaned, the safety of the human body, and the safety of the environment, and there is a need for a wide range of safe and easy-to-handle cleaning compositions. ing. Specifically, with alkaline cleaning agents, consideration must be given to inhibiting erosion of the material to be cleaned, and consideration must be given to handling since they are alkaline, and halogenated hydrocarbon solvents have been certified as ozone depleting substances. Substances that have been washed away will no longer be able to be cleaned in the near future, and substances that have been confirmed as solvents that are dangerous to the human body require great care when handling, and petroleum-based (containers and alcohol-based solvents) There is a problem in that it requires waiting for a relatively low flash point, arranging the cleaning process safely, and requiring a great deal of equipment consideration.

[Means for Solving the Problems] The present invention has been made by focusing on such conventional problems. In other words, it is a medium-quality oil in the classification of petroleum products, with a flash point of 100°C or higher, and a temperature of 400°C.
The component whose kinematic viscosity is 35 c S or less is 50~
90% by weight, and 10 to 50% by weight of a surfactant consisting of a polyoxyethylene alkyl ether type nonionic surfactant with HLB 5 to 8 and an ammonium salt, morpholine salt, or alkanolamine salt type anionic surfactant.
This is a cleaning composition. (Requirements constituting the means) The flash point used in the present invention is 100°C or higher, 40°C or higher.
Medium-quality oil in the classification of petroleum products with a kinematic viscosity of 35 cSt (centistokes) or less includes liquid paraffin (5 OVG), O2 15), machine oil (ISO
(G 7-22), spindle oil No. 1 or special No. 1, etc. If the flash point of medium oil is below lOO°C, it will be washed) 8f
1. Due to the equipment, sufficient consideration must be given to safety measures, and the standard for safety has been set at 00°C or higher, which is the same as the boiling point of water. Furthermore, if the kinematic viscosity at 40° C. exceeds 35 cSt, the cleaning performance will be poor and it will be difficult to obtain a clean surface of the parent wood after washing with water. Furthermore, if the medium oil component is less than 50% by weight, the cleaning properties will be poor, and if it exceeds 90% by weight, the water washing properties will be poor, and the hydrophilic surface of the material 1 to be cleaned will become difficult to clean. Polyoxyethylene alkyl ether type nonionic surfactants with HL B of 5 to 8 are produced by addition-polymerizing a predetermined amount of ethylene oxy to a higher alcohol having 6 to 22 carbon atoms.
Examples include components in which B is adjusted to 5 to 8. Ammonium, morpholine, or alkanolamine salt type anionic surfactants are anionic surfactants of each salt type such as alkanol sulfonic acid, alkanesulfonic acid, polyoxyalkylene alkylphenyl ether sulfonic acid, polyoxyalkylene alkyl ether sulfonic acid, etc. Examples include activators. Nonionic surfactants have a high or low l-ILB value other than 5 to 8, but have a high or low washability (this is poor); ”
These surfactants are essential for obtaining a hydrophilic surface, and if they are less than 10% by weight, the washability is poor, resulting in a hydrophilic surface, and if they exceed 50% by weight, the washability is poor. . The blending ratio of nonionic surfactant and anionic surfactant (,1, nonionic surfactant in the surfactant is 50 to 8
Preferably, the content is 0% by weight. The cleaning agent of the present invention mainly performs cleaning using only the constituent components, but water may be added to perform cleaning if necessary. The contamination to be cleaned is the contamination that has been thermally denatured in cases where additives or surfactants are not added to give lubricity, extreme pressure properties, anti-corrosion properties, etc. to a hydrocarbon oil base. Cleaning methods such as immersion, ultrasound, and spraying are used. After cleaning, hot water washing,
After washing with water and rinsing with a solvent if necessary, a clean object can be obtained after drying. [Effect] The cleaning composition of the present invention is CF C-113 or 11.1.
- Compared to h-lichloroethane, it exhibits the same level of cleaning effect and is environmentally safe because it does not cause ozone layer depletion.
Furthermore, it is safer for the human body (S), compared to cleaning with alcohol-based solvents or petroleum-based solvents such as kerosene. It has the characteristic of being superior in safety of the element to be cleaned 45. [Example] Each cleaning composition in Table 1 was prepared, and the following evaluation (
Effect examples 1 to 3) were performed. ``Cleanability-1'' Predetermined workpieces with oil-based cutting oil adhering to them were subjected to ultrasonic cleaning for 160 seconds at 60'C with each of the cleaning agent compositions shown in Table 1 (However, comparison cleaning agent No. 6 is adjusted to 10% with water, No. 7
After rinsing with running water and drying with hot air at 80°C, the remaining oil-based cutting oil was measured by ultraviolet spectrophotometry, and the cleanability (%) was determined by the following formula. Wataru Miyomi (degraded cleaning performance) 5% by weight and 20% by weight of the oil-based cutting oil to be cleaned were added to each of the cleaning compositions shown in Table 1, and the same operations and evaluations as in Effect Example 1 were carried out. Koto Katsuni l (Cleanability -2) Apply oil-based press oil evenly to SUS304 material, 100°
C After heat treatment for 30 minutes, each of the cleaning compositions in Table 1 was used.
Spray cleaning was performed at 0°C for 30 seconds at a spray pressure of 2 kg/cm2 (however, comparative cleaning agent No. 6 was adjusted to 10% with water, and No. 7 was washed at 30°C). After rinsing with running water,
The water wetness (hydrophilicity) % of the material was visually evaluated numerically and determined as washability. (The following is a blank space) The cleaning composition of the present invention shows excellent performance in all of Effect Examples] to 3, but none of the comparative cleaning compositions is excellent in all performances. [Effects of the Invention] The cleaning composition of the present invention can be used not only for fingerprint cleaning, rosin-based flux, and antirust oil, but also for cutting oil, grinding oil, etc. 11 G” Cleaning of metal processing oil such as breath oil]! 1 [, furthermore, it has excellent characteristics in terms of deterioration cleaning properties and also in obtaining surface hydrophilicity of the material to be cleaned. In addition, it contains no ozone layer depleting substances and is extremely safe to leave a mark on the environment, is safe to the human body, and has excellent operational safety.

Claims (2)

[Claims] 1. 50 to 90% by weight of a component that is medium oil in the classification of petroleum products, whose flash point is 100°C or higher and whose kinematic viscosity at 40°C is 35 cSt or lower, and polyoxyethylene alkyl with an HLB of 5 to 8. 1. A cleaning composition characterized in that the amount of a surfactant comprising an ether type nonionic surfactant and an ammonium salt, morpholine salt, or alkanolamine salt type anionic surfactant is 10 to 50% by weight. 2. The cleaning composition according to claim 1, which is used for cleaning metal working oil.