JPH0959677A - Detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a detergent composition which exhibits detergency at least equal to that of an organic solvent, scarcely causes pollution and is nonflammable. SOLUTION: This composition consists of 20-70wt.% organic solvent which has a boiling point under ordinary pressure of 150-300 deg.C and whose constituent elements comprise C and H, or C, H and O, 10-30wt.% surfactant and 5-50wt.% water.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a pressure-sensitive adhesive, a greasy abrasive, attached to a solid surface such as metal, pottery and fibers.
The present invention relates to a cleaning agent for soil components such as rubber and plastics, and a surface treatment agent for rubbers and plastics.

[0002]

2. Description of the Related Art Conventionally, adhesives, oily abrasives, rubbers, plastics, etc. adhere to solid surfaces with chlorine-based solvents such as 1,1,1-trichloroethane and organic solvents such as toluene, xylene and kerosene. What was done was being washed. However, with chlorine-based solvents, there is concern about environmental damage such as ozone depletion and underground permeation, and flammable solvents such as toluene pose a risk of fire and toxicity. In addition, JP-A-54-6
No. 3108 describes a method of adding water and a surfactant to these solvents, but the problems of flammability and toxicity have not been solved. On the other hand, alkaline water-based detergents and the like which have been used in recent years are insufficient for efficiently cleaning the stain component. From the above points, a cleaning agent that replaces the conventional solvent has been earnestly desired.

[0003]

DISCLOSURE OF THE INVENTION The present invention is capable of efficiently cleaning dirt components such as pressure sensitive adhesives, greasy abrasives, rubbers and plastics adhered to solid surfaces such as metals, pottery and fibers, and It is an object of the present invention to provide a non-halogen type cleaning composition which is a flammable substance and has low toxicity.

[0004]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the inventors of the present invention found a detergent having excellent performance and completed the present invention. That is, the cleaning agent of the present invention is the following composition. a) Organic solvent having a boiling point in the range of 150 to 300 ° C. at atmospheric pressure and constituent elements of carbon and hydrogen or oxygen thereof and 20 to 70% by weight b) Surfactant 10 to 30% by weight c) Water 5 -50% by weight This composition is brought into contact with an object to be cleaned at room temperature or under heating, and solids such as metal, pottery and fibers are formed by a method such as immersion, immersion rocking, ultrasonic wave, jet, spray, hand-wiping or brushing. Adhesive such as cam tape adhered to the surface, oil-based abrasive (also called buffing abrasive, made by kneading abrasive particles made of fine inorganic material such as alumina and oil-based components such as wax), rubber and plastics Etc. can be washed. Further, the surface treatment of rubber and plastic can be performed with this composition.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The type of organic solvent in the present invention is not particularly limited as long as it is an organic solvent whose constituent elements are carbon and hydrogen or oxygen with these, and saturated or unsaturated aliphatic hydrocarbons, Aromatic hydrocarbons, ethers,
Examples thereof include esters and ketones, which may be used alone or in combination of two or more. The concentration of the organic solvent other than the boiling point range is 20% by weight based on the whole organic solvent.
It does not matter if they are mixed below.

Specific examples of these organic solvents include petroleum distillates such as kerosene, isoprene derivatives, decane, 1-decene,
Undecane, 3-methyldecane, dodecane, tridecane, tetradecane, mesitylene, tetralin, n-butylbenzene, sec-butylbenzene, tert-butylbenzene, cyclohexylbenzene, diethylbenzene, n-pentylbenzene, dipentylbenzene, p-menthane, bicyclohexyl. , Decahydronaphthalene, tetramethylcyclohexane, anisole, phenetole, butylphenyl ether, pentylphenyl ether, methoxytoluene, benzylethyl ether, diphenyl ether, 1,2-dibutoxyethane, butyl benzoate, methyl benzoate, 2-heptanone , Diisobutyl ketone, acetonylacetone, phorone, isophorone, cyclohexanone, methylisohexanone and acetophenone. Preferred organic solvents are aliphatic hydrocarbons, aliphatic cyclic hydrocarbons and aromatic hydrocarbons, which have good detergency and solubility and are inexpensive.

The boiling point of the organic solvent in the present invention at atmospheric pressure is in the range of 150 to 300 ° C., an organic solvent having a boiling point lower than 150 ° C. may cause ignition, and a high-boiling substance having a boiling point higher than 300 ° C. Solubility decreases.

The composition ratio of the organic solvent in the entire composition is 2
It is in the range of 0 to 70% by weight, preferably 20 to 60% by weight. If it is less than 20% by weight, detergency and solubility are poor, and if it exceeds 70% by weight, the flammability of the composition becomes a problem.

The surfactant in the present invention is preferably an anionic or nonionic surfactant, and one or two or more of them can be used as a mixture. Among them,
The number of carbon atoms constituting the hydrophobic group is preferably 11 or more. Examples of the anionic surfactant include alkylbenzene sulfonate and polyalkylene glycol alkyl sulfate, and specific examples thereof include dodecylbenzene sulfonic acid triethanolamine and sodium polyoxyethylene octylphenyl sulfate. Examples of nonionic surfactants include polyoxyalkylene alkyl ethers, polyoxyalkylene alkyl phenyl ethers, and sorbitan laurate, and the HLB value of these is preferably 10-18. Specific examples thereof include polyoxyethylene lauryl ether, polyoxyethylene nonylphenyl ether, and those obtained by modifying the hydroxyl group at the hydrophilic terminal of these surfactants with a benzyl group or a methyl group.

These surfactants are used in the composition range of 5 to 30% by weight. If it is less than 5% by weight, the composition may not be uniformly mixed or the rinsing property after cleaning may be deteriorated.
On the other hand, if it exceeds 30% by weight, the detergency and the solubility decrease. To maintain a stable state for a long time, 1 surfactant is recommended.
0-25% by weight is preferred.

As the water in the composition of the present invention, any water such as reverse osmosis water, ion exchange water, distilled water, tap water and industrial water can be used. The composition ratio of water is 5 to 50% by weight
It is. If it is less than 5% by weight, flammability is likely to occur and 50
When it exceeds the weight%, detergency and solubility are adversely affected. The water content is preferably 10 to 40% so as not to generate flammability for a long period of time and to obtain sufficient cleaning and melting output.

The respective components in the composition of the present invention can be mixed by a usual method, but if necessary, heating, stirring or the like may be carried out at the time of mixing. The composition is extremely stable and can be stored for a long period of time, but it is also effective to perform a treatment such as stirring at an appropriate time during storage.

The detergent composition obtained by the above method,
It is preferable to add a monoalkyl glycol in order to improve the handling property such as decreasing the viscosity, the rinsing property, or the storage stability such as prevention of separation. As the monoalkyl glycol, those having 10 or less carbon atoms constituting the hydrophobic group and having a flash point of 100 ° C. or more are preferable. Specific examples include methyltriglycol, butyldiglycol, hexyldiglycol, 2-ethylhexyldiglycol, phenylglycol and benzylglycol. These monoalkyl glycols can be used alone or in combination of two or more. The monoalkyl glycol is preferably used in the range of up to 30% by weight of the total composition, and more preferably added in the range of 1/3 to 3 times the amount of the surfactant.

In order to improve the performance of the composition, alcohols, alkanolamines, fatty acids, rust preventives, antifoaming agents and the like may be added within a range that does not impair the performance of the composition. For example, oleic acid triethanolamine salt as a cloud point improver or rust inhibitor when using a nonionic surfactant, gluconic acid triethanolamine salt as a rust inhibitor, monoethanolamine and diethanolamine, and the like. An example of adding benzyl alcohol, 1-decanol, and the like in an amount of 0.2 to 15% by weight to adjust the solubility is given.

[0015]

EXAMPLES The effects of the present invention will be specifically described below with reference to examples and comparative examples.

Examples 1 to 4 and Comparative Examples 1 to 4 The compositions shown in Table 1 below were prepared, and the following tests were carried out using the compositions and xylene, 1,1,1-trichloroethane and ethyl acetate. did. [Test 1] 1) The above composition and compound were brought into contact with gum tape (cloth adhesive tape No. 750, manufactured by Nitto Denko Corporation) at 50 ° C. for 1 hour. 2) Brushing was performed with a nylon brush to remove the adhesive. 3) Immersion rocking rinse was performed with tap water for 1 minute to perform natural drying. 4) After drying, the degree of removal of the pressure-sensitive adhesive was visually observed, and the results are shown in Table 2.

[Test 2] 1) The above compositions and compounds were contacted at 50 ° C. for 3 minutes with an aluminum plate polished with a fat / abrasive polishing agent (blue bar). 2) Brushing with a nylon brush was performed to remove the oil / fat abrasive. 3) Immersion rocking rinse was performed with tap water for 1 minute to perform natural drying. 4) After drying, the removal degree of the oil / fat abrasive was visually observed, and the results are shown in Table 2.

[0018]

[Table 1]

Description of Table 1 * 1: Aliphatic hydrocarbon boiling point range 242 to 270 ° C
(EXXSOL D110, manufactured by Exxon Chemical Co., Ltd.) * 2: Aromatic hydrocarbon boiling point range 231 to 275 ° C
(Solvesso 200, manufactured by Exxon Chemical Co., Ltd.) * 3: Aromatic hydrocarbon boiling point range 188 to 210 ° C
(Solvesso 150, Exxon Chemical Co., Ltd.) * 4: Polyoxyethylene lauryl ether (HLB =
13.1, Newcol 1100, manufactured by Nippon Emulsifier Co., Ltd. * 5: Polyoxyethylene nonyl phenyl ether (H
LB = 15.2, Newcol568, manufactured by Nippon Emulsifier Co., Ltd.) * 6: Alkylbenzenesulfonic acid triethanolamine (Lipon LT-270, manufactured by Lion Co., Ltd.)

The results of the cleaning test with each composition are shown in Table 2.

[0021]

[Table 2]

Description of Table 2 Visual evaluations were conducted in Test 1 and Test 2, and the symbols will be described. ◎ Dirt is easily removed and does not remain. ○ Dirt is removed sufficiently, but mechanical force for cleaning is required. △ Stain removal is insufficient. × Almost impossible to remove.

As is apparent from Table 2, the compositions of the present invention (Examples 1 to 4) are less flammable than the comparative examples and have a detergency equal to or higher than that.

[0024]

[Effect] The composition of the present invention exerts an excellent effect in cleaning dirt components such as adhesives, greasy abrasives (buffing powder), rubber and plastics adhered to solid surfaces such as metal and pottery. It can be handled in the same way as conventional solvents, and can be handled safely with less ignition and toxicity.

Claims (2)

[Claims] 1. A cleaning composition comprising the following composition. a) Organic solvent having a boiling point in the range of 150 to 300 ° C. at atmospheric pressure and constituent elements of carbon and hydrogen or oxygen thereof and 20 to 70% by weight b) Surfactant 10 to 30% by weight c) Water 5 ~ 50% by weight 2. The cleaning composition according to claim 1, wherein the organic solvent of a) is a hydrocarbon.