JPH09111288A - Surface-active detergent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a surface-active detergent having detergency at the same level as that of a conventional one without promoting the neutralization of or damage to cement concrete structures and without eluting asphalt components. SOLUTION: This surface-active detergent comprises a nonionic surfactant as one. of active ingredients for washing concrete structures and a nonionic surfactant having <=10% asphalt peel ratio in a 0.5% aqueous solution of the surfactant as one of the active ingredients for washing materials having the possibility of contact with asphalt. The detergent is respectively regulated so as to provide pH10.0-12.0 and 8-12 hydrophile-lipophile balance(HLB).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washer for cleaning the surfaces and outer walls of various vehicles, aircraft, buildings, civil engineering structures, etc., or for glass, rubber, plastic, metal, floor materials, coating films, etc. The present invention relates to a surface-active detergent for cleaning with an oil film removing effect for liquids, automobile window washer liquids and the like.

[0002]

Conventionally, as a cleaning agent of this kind, in addition to an anionic surfactant mainly having an oil film removing effect, polyoxyethylene (10) which is a highly water-soluble nonionic surfactant is used. Mol) nonyl phenyl ether is used.

However, the anionic surfactant promotes neutralization and damage of the cement concrete structure,
It was found that the asphalt content was dissolved and eluted in water.

On the other hand, the nonionic surfactant naturally does not have an ionizing action, and if the pH is 10.0 to 12.0 which is compatible with the pH of concrete, there is no problem of neutralization. It does not promote neutralization or damage, and does not have the problems of anionic surfactants for cement concrete structures.

However, among nonionic surfactants such as polyoxyethylene (10 mol) nonylphenyl ether having an asphalt exfoliation rate of 10% or more, the asphalt content is dissolved and eluted in water. It has been confirmed.

When such a surfactant is used as a cleaning component, when a dissolved contact substance is present in the environment, it leads to great environmental damage.

[0007] In particular, when the cleaning agent after use is released into the environment, the cement concrete structure in the environment may be neutralized and the asphalt content may be dissolved, which may lead to great environmental damage. There is.

That is, when the asphalt stripping rate of the surfactant exceeds the level, the asphalt content is dissolved and benzo (a) anthracene, benzo (b) fluoranthene, benzo (j) fluoranthene, chrysene, methylbenzo (a) are contained in the asphalt. ) Carcinogens such as anthracene, benzo (a) pyrene, and benzo (e) pyrene will be dissolved in water.

Conventionally, since asphalt is an oil, it has been considered that it does not melt in water, but a specific surfactant dissolves the asphalt and dissolves the components in the asphalt into water to form an aqueous solution. There is a danger of being rolled up by running and spreading in the air or water.

[0010]

The present invention provides a surface active agent for cement concrete structures having the same level of detergency as conventional detergents and eliminating adverse effects such as neutralization on the cement concrete structures. It is an object of the present invention to provide a cleaning agent and a surface-active cleaning agent that does not cause dissolution of the asphalt content for a cleaning target that may be released on the asphalt surface.

That is, a nonionic surfactant is contained as one of the active ingredients, and the pH as a whole is 10.0 to 12.0 and H.
By adjusting LB to 8-12, the concrete absorbs Co ₂ even if the detergent contacts the concrete surface.
Since it is not in the H state and the hydrophilicity and lipophilicity are regulated by adjusting HLB, calcium carbonate in concrete with a pH of about 12 is significantly suppressed, and even if it comes into contact with asphalt, the dissolving power is restricted. I chose

[0012] Further, by making the nonionic surfactant inactive to Ca (OH) _{2, the} neutralization effect on cement concrete is further suppressed, and the surface activity for cement concrete structure is targeted. The safety as a cleaning agent was ensured.

However, when the nonionic surfactant used has an asphalt peeling rate of 10% or more in an aqueous solution containing 0.5% of the surfactant, the dissolving power for the asphalt content is increased and the nonionic surfactant is released to the asphalt surface. Surfactant 0.5 for those intended for potential cleaning.
% Aqueous solution, a nonionic surfactant having an asphalt peeling rate of 10% or less was used.

Regarding those intended for cleaning objects that may be released to the asphalt surface, by further making the nonionic surfactant inactive to the asphalt, the dissolution action on the asphalt content Was further suppressed.

Further, by making the nonionic surfactant biodegradable, even if the absorbability of concrete or asphalt as an aqueous solution is enhanced, the decomposition action on the object is suppressed.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in accordance with experiments conducted by the applicants. First, since the surfactant used in the present invention is nonionic, the influence of the conventionally used anionic surfactant and nonionic surfactant on the cement concrete structure was confirmed.

Therefore, when the phenolphthalein liquid is brought into contact with the surface of each cement concrete where the washer liquid using the respective surfactants has a lot of contact, the cement concrete having a large contact with the anionic surfactant is It has been confirmed that the powder has been dusted to a depth of 4 to 5 cm 30 years after construction, and calcium carbonate is progressing. However, it has been confirmed that cement concrete, which has many opportunities to come into contact with nonionic surfactants. Did not see this situation

Next, in order to confirm the peeling rate due to the dissolution action of each surfactant to the asphalt, the soil etc. which enhances the peeling rate was removed by washing with water, and the test material (stone used as aggregate) coated with asphalt and dried was used. Dip in a 0.5% aqueous solution of the test surfactant for 30 minutes at a liquid temperature of 80 ° C, wash it at a water temperature of 80 ° C, compare the amount of asphalt remaining on the surface of the test material with the amount applied, and measure the peeling rate. Was measured.

The test sample was a nonionic one, polyoxyethylene orthyl phenyl ether, polyoxyethylene orthyl phenyl ether (3 mol), polyoxyethylene lauryl ether, polyoxyethylene nonyl phenyl ether.

As an anionic substance, polyoxyethylene alkylphenyl ether sulfate Na, which is currently used as a detergent, amine salt of alkylbenzene sulfonic acid, alkylbenzene sulfonate, polyoxyethylene lauryl ether sulfate Na, 560SN polyoxyethylene Nonylphenyl ether sulfate Na, 560SF polyoxyethylene nonylphenyl ether sulfate NH ₃ , 1305SN polyoxyethylene tridecyl ether sulfate Na were used.

As a result, with respect to nonionic polyoxyethylene orthyl phenyl ether and polyoxyethylene orthyl phenyl ether (3 mol), peeling was not observed at all and it was 0%. It was confirmed that even with ethyleneoltyl phenyl ether (3 mol), when the number of mols increased, it increased to about 5%.

Furthermore, it was confirmed that even with the same nonionic property, there are some which have a high peeling rate, such as polyoxyethylene lauryl ether of 10% and polyoxyethylene nonylphenyl ether of 70%.

For anionic substances, polyoxyethylene alkylphenyl ether sulfate Na 70%, alkylbenzene sulfonic acid amine salt 26%, alkylbenzene sulfonate 70%, polyoxyethylene lauryl ether sulfate Na 60%, 560SN polyoxyethylene nonyl Phenyl ether sulfate Na 50%, 560SF polyoxyethylene nonyl phenyl ether sulfate NH ₃ 50%, 1305SN polyoxyethylene tridecyl ether sulfate Na 70%, showing a high exfoliation rate without exception.

Further, the pH of the detergent and HLB have a great influence on the neutralizing action of the surfactant on the cement concrete and the dissolving action of the asphalt content. Even with the same surfactant, the pH is 10.0 to 12.0 and the HLB is It was confirmed that the action was suppressed under the conditions of 8 to 12.

Further, a nonionic surfactant is added to Ca (OH) ₂
On the other hand, if it is inactive, the neutralizing effect on the cement concrete is lost, and if it is inactive to asphalt, the peeling rate is extremely reduced.

Since the components of the surfactant decompose to act on the object, the biodegradability of the nonionic surfactant tends to suppress the compounding action on the object. be able to.

Nonionic surfactants include ether type,
There are ether ester type, ester type, and nitrogen-containing type, and the above-mentioned specific types include those having an asphalt peeling rate of 10% or more in an aqueous solution of 0.5% surfactant.

Therefore, in the present invention, as for the objects to be cleaned which may be released on the asphalt surface, the asphalt peeling rate is above the level,
That is, the polyoxyethylene (10
A nonionic surfactant except for those having an asphalt exfoliation rate higher than the standard such as nonylphenyl ether is used.

Examples of the ether type include alkyl, alkylallyl polyoxyethylene ether, alkylallyl formaldehyde condensed polyoxyethylene ether, block polymer having polyoxypropylene as a lipophilic group, and polyoxyethylene polyoxypropyl alkyl ether.

The ether ester type includes polyoxyethylene ether of glycerin ester, polyoxyethylene ether of sorbitan ester, polyoxyethylene ether of sorbitol ester, polyoxyethylene orthylphenyl ether and the like.

Examples of the ester type include polyethylene glycol fatty acid ester, glycerin ester, polyglycerin ester, sorbitan ester, propylene glycol ester, and sucrose ester.

The nitrogen-containing type is a fatty acid alkanolamide,
Examples include polyoxyethylene fatty acid amide, polyoxyethylene alkylamine or amine oxide.

After blending alcohols, glycols and amines with one of these nonionic surfactants as one of the active ingredients and adding a rust preventive and a coloring agent, the total pH is 10.0 to 12.0. And adjust so that HLB becomes 8-12.

In the present invention, the cleaning agent constructed as described above is
It is used by diluting or increasing the amount according to the application, and contributes to the environmental maintenance as well as the review of the surface-active detergents that have conventionally contributed to the environmental destruction.

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[Procedure amendment]

[Submission date] May 23, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 2

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Claim 4

[Correction method] Change

[Correction contents]

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] Claim 5

[Correction method] Change

[Correction contents]

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

That is, a nonionic surfactant is contained as one of the active ingredients, and the pH as a whole is 10.0 to 12.0 and H.
By adjusting LB to 8 to 12, even if the cleaning agent comes into contact with the concrete surface, the concrete is not in a pH state of absorbing carbon dioxide (CO ₂ ), and the hydrophilic property is adjusted by adjusting HLB.
Since lipophilicity is also regulated, calcium carbonate in concrete with a pH of about 12 is significantly suppressed, and the dissolving power is restricted even when it comes into contact with asphalt.

Claims (5)

[Claims] 1. A nonionic surfactant is contained as one of the active ingredients, and the total pH is 10.0 to 12.0 and HLB.
Surfactant consisting of an aqueous solution or emulsion in which the water content is adjusted to 8-12 2. A nonionic surfactant having an asphalt exfoliation rate of 10% or less in an aqueous solution containing 0.5% of a surfactant is contained as one of active ingredients, and as a whole, the pH is 10.0 to 12.0 and the HLB is 8 to. A surface-active detergent consisting of an aqueous solution or emulsion adjusted to 12. 3. The surfactant cleaning agent according to claim 1, wherein the nonionic surfactant is inert to Ca (OH) _2. 4. The surfactant cleaning agent according to claim 2, wherein the nonionic surfactant having an asphalt peeling rate of 10% or less in an aqueous solution containing 0.5% of a surfactant is made inactive to asphalt. 5. The surfactant cleaning agent according to claim 1, wherein the nonionic surfactant having an asphalt exfoliation rate of 10% or less in an aqueous solution of 0.5% surfactant is biodegradable.