JPS60177088A - Foaming agent for air excavation - Google Patents

Abstract

PURPOSE:To provide a foaming agent for air excavation, composed of a composition containing a specific anionic surfactant, a specific amine oxide and a specific fatty acid diethanolamide, and exhibiting sufficient foamability and foam stability even in a soil having high hardness. CONSTITUTION:The objective foaming agent is composed of a composition containing (A) 50-95(wt)% anionic surfactant having 8-40 carbon atoms and containing one or more -SO3M or -OSO3M groups (M is Na, K, NH4 or organic ammonium) and (B) 5-30% amine oxide of formula I [R<1> is 6-24C alkyl or alkenyl; R<2> and R<3> are 1-3C (hydroxy)alkyl; m is 1-10; n is 0 or 1] and/or fatty acid diethanolamide of formula II (R<4>CO is 8-26C acyl).

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to a blowing agent for air drilling.

[Prior art]

When polling is performed, a large amount of water is normally used to cool the tip of the drill bit and to discharge chips generated by drilling out of the hole. air excavation is carried out. In air drilling, air is often injected into a foaming agent solution to form foam.

In this case, the properties of the foam are extremely important, and it can be foamed with a small amount of water.

In addition, the foam produced must be stable for a long period of time.

Conventional blowing agents include 1, for example, Japanese Patent Publication No. 49-6961.
The issue contains polyoxyethylene alkyl ether sulfate sodium salt as a blowing agent, JP-A-51-52988.
No. 2, No. 1, No. 1, No. 1, No. 1, No. 1, 2003, 1996, discloses a composition consisting of polyoxyethylene alkyl ether sulfate sodium salt, bentonite, ribonite, astex, soda ash, sodium hydroxide, and carboxymethyl cellulose. All of these foaming agents mainly contain an anionic surfactant as a foaming component, and in the latter case, a thickener, a foam stabilizer, etc. are added thereto. When the foaming component is only an anionic surfactant, foaming properties and foam stability are good when the hardness of the water used is low, but foaming properties and foam stability are poor when the hardness of the water is high. There was a drawback that the 1-ruble such as nozzle clogging often occurred due to the extremely low water resistance.

[Purpose of the invention]

The present invention is aimed at improving the above-mentioned drawbacks, and by adding a specific amine derivative to a specific anionic surfactant, foam for air drilling that exhibits sufficient foaming properties and foam stability even at high hardness. The aim is to provide a drug.

[The unfortunate result of invention]

The present invention uses 50 to 95% by weight (however, M
is sodium, potassium, ammonium or organic ammonium), and as component B, one or more compounds selected from amine oxide represented by general formula (1) and fatty acid jetanolamide represented by general formula (2) 5 An air drilling blowing agent comprising a composition containing ~30% by weight.

2 R' C0N(C2H40H)2...(2) (However, R1 is an alkyl group or alkenyl group having 6 to 24 carbon atoms, RZ and R2 are each an alkyl group or hydroxyalkyl group having 1 to 3 carbon atoms, m is 1 to 10, n is 0 or 1, and R' CO is an acyl group having 8 to 26 carbon atoms. It is salt. Sulfonic acids or sulfuric acid esters include α-olefin sulfonic acid, petroleum sulfonic acid, polybutenesulfonic acid, alkylbenzene sulfonic acid, alkyl or alkenylmethyl taurine, alkyl or alkenyl sulfate ester, polyoxyethylene alkyl ether or alkenyl ether sulfate, dialkyl or There are alkenyl sulfosuccinic acids and the like, and their salts include sodium salts, potassium salts, ammonium salts, and organic ammonium salts such as monoethanolamine salts, jetanolamine salts, triethanolamine salts, and morpholine salts. As the alkyl group and alkenyl group,
2-ethylhexyl group, octyl group, nonyl group, decyl group, undecyl group, lauryl group, tridecyl group, myristyl group, cetyl group, isocetyl group, stearyl group, isostearyl group, oleyl group, octyldodecyl group, behenyl group, decyl group Examples include the tetradecyl group. These A components can be used alone or in combination of two or more.

Among component B, in the amine oxide represented by the general formula (1), the alkyl group and alkenyl group having 6 to 24 carbon atoms represented by R1 include hexyl group, peptyl group, 2
- ethylhexyl group, octyl group, nonyl group, decyl group, undecyl group, lauryl group, 1-helizosyl group, myristyl group, cetyl group, isocetyl group, stearyl group, isostearyl group, oleyl group, octyldodecyl group, behenyl group, Examples include decyltetradecyl group, and R2
Examples of the alkyl group having 1 to 3 carbon atoms and hydroxyalkyl group represented by R3 include methyl group, ethyl group, propyl group, isopropyl group, hydroxyethyl group, and hydroxypropyl group. m is the average number of moles of oxyethylene groups added, and when n=1, it indicates that the amine oxide of general formula (1) is an ethylene oxide addition product.

Among component B, in the fatty acid jetanolamide represented by the general formula (2), carbon number 8 to R′ CO is
Hayashi, caprylic acid as the acyl group of 26.

pelargonic acid, 2-ethylhexanoic acid, nonylic acid, capric acid, undecyl acid, lauric acid, myristic acid,
Examples include acyl groups derived from valmitic acid, margaric acid, stearic acid, arachidic acid, behenic acid, palmitoleic acid, oleic acid, linoleic acid, lylinic acid, erucic acid, impalmitic acid, isostearic acid, and the like. Component B can be used alone or in combination of two or more, depending on the differences in R1-R4, nt, and n.

The composition of the present invention contains 50 to 95% A component and 5 to 30% B component. Although it contains ffX as an essential component, it may contain other components such as a thickener in an amount of 20% by weight or less, if necessary. Examples of thickeners that can be added include polyethylene glycol, polyethylene glycol fatty acid diester, block copolymers of ethylene oxide and propylene oxide, polyvinyl alcohol cellulose, hydroxyethyl cellulose, and hydroxypropyl cellulose. It is 5-20% heavy weight.

In the present invention, the content of component A is limited to 5
This is because if it is less than 0 overlapped parts or exceeds 95 overlapped parts, foamability and foam stability will deteriorate. R', R2, R", R' of B component.

The reason why In,n is limited is that if it is outside this range, the foamability and foam stability will deteriorate, and the content of component B is also limited if it is less than 5% by weight or 30% by weight. %, the foamability and foam stability deteriorate.

The foaming agent for air drilling of the present invention is obtained by mixing component A, component B, and other components as necessary at room temperature to 80°C. If the viscosity or freezing point is high and it is difficult to handle, it may be diluted with water. The blowing agent thus obtained is used in a conventional manner as a blowing agent during air drilling. As for the usage method, as described above, the foaming agent solution can be foamed by any method, such as a method of injecting air into the foaming agent solution to foam it, or a method of foaming the foaming solution by injecting the foaming solution into pressurized air.

〔Effect of the invention〕

Since the foaming agent for air drilling of the present invention contains component A and component B as essential components, it has excellent foaming properties and foam stability regardless of whether the hardness is low or high.6 [Example 6] ] Examples of the present invention will be described below. In the examples, %
All numbers indicate weight %.

First, 0.1 g of the foaming agent shown in Table 1 was added and dissolved in 100 mQ of tap water with a hardness of 30 degrees, and the solution was stirred with a mixer for 30 seconds to foam, and then the mixer was stopped.

Measure the total solution volume immediately after stopping.

Foaming properties were evaluated. When left as it is, water gradually separates, so the stability of the foam was evaluated by measuring the time it took for 50 mQ, which is half of the test amount, to separate. A similar test was conducted using a 0.1% calcium chloride aqueous solution instead of tap water to evaluate the performance of the blowing agent at high hardness. The results are shown in Table 2.

From the results in Table 2, it can be seen that the foaming agent of the present invention has superior foaming properties and foam stability compared to the comparative products.

Table 2 Agent: Patent attorney Sei Yanagi Hara

Claims (1)

[Scope of Claims] (1> As component A, 50 to 95 parts% of an anionic surfactant having 8 to 40 carbon atoms and at least one 1503M or 10503M in the molecule (provided that M is sodium, potassium, ammonium or organic ammonium), and as component B, one or more compounds selected from amine oxide represented by general formula (1) and fatty acid jetanolamide represented by general formula (2) 5 A foaming agent for air drilling consisting of a composition having a weight ratio of ~30%. , R3 is an alkyl group or hydroxyalkyl group each having 1 to 3 carbon atoms. m is 1-10. n is 0 or 1-R'CO is an alkyl group or hydroxyalkyl group having 1 to 3 carbon atoms.
It is a 2G acyl group. ) (2) Component A is α-olefin sulfonic acid, petroleum sulfonic acid, polybutenesulfonic acid, alkylbenzenesulfonic acid, alkyl or alkenylmethyl taurine, alkyl or alkenyl sulfate, polyoxyethylene alkyl ether or alkenyl ether sulfate, or the sodium, potassium, or ammonium salts of dialkyl or alkenyl sulfosuccinic acids. The blowing agent for air drilling according to claim 1, which is a monoethanolamine salt, jetanolamine salt, triethanolamine salt, or morpholine salt. (3) R' is a hexyl group, heptyl group, 2-ethylhexyl group, octyl group, nonyl group, decyl group, undecyl group, lauryl group, tridecyl group, myristyl group, cetyl group, isocetyl group, stearyl group, isostearyl group , oleyl group, octyldodecyl group, behenyl group, or decyltetradecyl group. (4) Claims 1 to 3 in which R'' and R' are a methyl group, an ethyl group, a propyl group, an isopropyl group, a hydroxyethyl group, or a hydroxypropyl group.
A foaming agent for air drilling according to any of paragraphs. (5) R'Co is caprylic acid, pelargonic acid, 2-
Ethylhexanoic acid, nonylic acid, capric acid, undecylenic acid, lauric acid, myristic acid, palmitic acid, margaric acid, stearic acid, arachidic acid, behenic acid, palmitoleic acid, oleic acid, linoleic acid, lylunic acid, erucic acid, isoacid The foaming agent for air excavation according to any one of claims 1 to 4, which is an acyl group derived from palmitic acid or isostearic acid. (6) The foaming agent for air drilling according to any one of claims 1 to 5, wherein the composition contains 20% by weight or less of other components. (7) The air according to claim 6, wherein the other component is polyethylene glycol, polyethylene glycol fatty acid diester, block copolymer of ethylene oxide and propylene oxide, polyvinyl alcohol, carboxymethyl cellulose, methyl cellulose, hydroxyethyl cellulose, or hydroxypropyl cellulose. Foaming agent for drilling.