JP2938220B2 - Quenched oil composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quenched oil composition, and more particularly to a polyether-based quenched oil composition.

[0002]

2. Description of the Related Art Quenching is a means for improving the hardness of an object to be treated (steel), and quenching oil is used for this purpose.

Conventionally, mineral oil has been used as a quenching oil. However, there is a problem in that when it is performed in the atmosphere, there is a risk of causing a fire accident. For this reason, a water-soluble quenching oil which does not cause a fire has recently been used. As the water-soluble quenching oil, those which are made water-soluble by mixing a mineral oil surfactant and those which are polyether-based and have a high ethylene oxide content are used.

[0004] The polyether type has a feature that the lubricating property of a quenched oil is improved when a high molecular weight polyol is used.

[0005]

In the prior art, when producing a high molecular weight polyether polyol, the proportion of ethylene oxide and propylene oxide used cannot be controlled. In order to obtain a higher molecular weight polyether polyol, it was necessary to increase the ethylene oxide content.

[0006] Therefore, the kinematic viscosity 8000 (c S t / 10
(0 ° C.) or higher, the use of polyether polyols for quenching oils has high hydrophilicity, so that the selection range of additives to be added to the system is narrow, and the film forming performance on the metal surface during quenching is poor. There was a problem.

[0007]

The above objects can be attained by adding ethylene oxide and a monoepoxide having 3 or more carbon atoms to an initiator according to the present invention at a ratio of 80/20 to 50/50% by weight. Kinematic viscosity at 8
Quenching oil compositions containing polyethers 000c S t~100000c S t, or consisting of the polyethers and water and surfactant quenching oil compositions are solved by.

Polyethers such as polyoxyalkylene polyols obtained by subjecting an initiator to a ring-opening reaction of a monoepoxide such as an alkylene oxide are used as raw materials for synthetic resins such as polyurethane, surfactants, functional oils, lubricating oils, and the like. Widely used for other applications.

The initiator is a hydroxyl group-containing compound represented by A- (H) _n (A: residue excluding the hydrogen atom of the hydroxyl group of the hydroxyl group-containing compound, n: an integer of 1 or more). Examples of the initiator include a monohydric alcohol, a polyhydric alcohol, a monohydric phenol, and a polyhydric phenol. Further, compounds having a hydroxyalkylamino group (alkanolamines, amines-alkylene oxide adducts, etc.) are also used as initiators. Further, polyethers obtained by reacting the above initiator with a monoepoxide are also used as the initiator.

The polyethers are the following compounds obtained by subjecting the above initiator to a ring-opening addition reaction of a monoepoxide. A [-(RO) _m -H] _n RO: ring-opened unit of monoepoxide m, n: an integer of 1 or more

Conventionally, as a method for producing polyethers, a method of reacting a monoepoxide in the presence of an alkali catalyst has been widely used. As the alkali catalyst, an alkali metal compound such as potassium hydroxide or sodium hydroxide has been used. For the purification of polyethers using them as catalysts, neutralization with neutralizing agents such as phosphoric acid and carbon dioxide, and adsorption treatment with adsorbents such as magnesium silicate and aluminum silicate were performed . .

[0012] However, polyethers obtained by using an alkali catalyst, unsaturated polyethers monool (hereinafter referred to as unsaturated monool) is produced easily, in particular, the molecular weight of the polyethers is high As this tendency becomes more pronounced, it has been virtually impossible to synthesize polyethers having a molecular weight of 6500 or more when propylene oxide is used as the monoepoxide.

On the other hand, the production of unsaturated monool is small.
It has been known to produce polyethers using a double metal cyanide complex as a catalyst as a method for producing polyethers which are not present (US Pat. No. 3,278,457, U.S. Pat.
S3278458 and US Pat. No. 3,278,459), the present inventors have found that this complex compound exhibits high randomness as a random copolymerization reaction catalyst of propylene oxide and ethylene oxide (Japanese Patent Application No. 2-40956).
No.), leading to the production of polyoxyalkylene polyols for use in the present invention.

In the production of these polyethers,
As it late is necessary to perform the charging and partial purification, from polyethers using a composite metal cyanide complex catalyst, in order to remove the catalyst, simply and filtered it not only treated with an adsorbent, a catalyst Must be decomposed with an alkali or acid to ionize, and then these decomposed products, residual alkali and residual acid must be removed by adsorption and filtration.

As a method of treating with an alkali, alkali metals and alkali metal hydroxides (US Pat.
8), a method using an alkali metal hydride (US Pat. No. 4,721,818) is known. For example, there is a method in which after deactivating the catalyst by adding an alkali, the deactivated catalyst component or alkali is treated with an adsorbent or an ion-exchange resin, and removed by filtration or the like. However, the method of removing the double metal cyanide complex catalyst is not limited to these.

In the present invention, a polyoxyalkylene polyol produced using the above-mentioned double metal cyanide complex catalyst is used. The polyoxyalkylene polyol is obtained by sequentially subjecting an initiator having at least two active hydrogens to a ring-opening addition reaction of a monoepoxide such as an alkylene oxide.

As the initiator, a polyhydroxy compound having 2 to 8 hydroxyl groups is particularly preferable. Examples of the polyhydroxy compound include dihydric alcohols such as ethylene glycol and propylene glycol, trihydric alcohols such as glycerin, trimethylolpropane, and hexanetriol; alcohol, there is 及 beauty polyethers lower molecular weight than the desired product obtained by the monoepoxide is reacted such alkylene oxide to these alcohols.

Moreover, bisphenol A, resole, compounds having a phenolic hydroxyl group and methylol group such as a novolac, ethanolamine, compounds having a hydroxyl group and other active hydrogen such as diethanolamine, 及 Beauty thereto by reacting a monoepoxide such as an alkylene oxide And low molecular weight polyethers.

Further, there are polyethers having a lower molecular weight than the target product obtained by reacting a monoamine or polyamine having at least two hydrogen atoms bonded to a nitrogen atom with a monoepoxide such as an alkylene oxide. In addition, phosphoric acid, its derivatives, and other polyhydroxy compounds can also be used. These polyhydroxy compounds may be used in combination of two or more.

As the monoepoxide having 3 or more carbon atoms,
Alkylene oxides having 4 or less carbon atoms, such as propylene oxide, 1,2-butylene oxide and epichlorohydrin, are preferred. And ethylene oxide, one or used by copolymerizing monoepoxide having 3 or more than two carbon atoms. They may be mixed and added to form a random polymer chain, or they may be added sequentially to form a block polymer chain.

The proportion of ethylene oxide and other epoxides used is 80/20 to 50/50% by weight, preferably 80/20.
/ 20 to 60/40% by weight.

In the present invention, a polyether monool obtained by subjecting a monovalent initiator to a ring-opening reaction with an alkylene oxide can also be used. Examples of the monovalent initiator, such as methanol, ethanol, butanol, hexanol, and other mono-ol, phenol, alkyl-substituted phenol derivatives such as phenol, 及 Beauty polyethers these obtained by reacting alkylene oxides, addition, nitrogen atom And polyamines obtained by reacting an alkylene oxide with a monoamine or a polyamine having one hydrogen atom bonded to a polyamine.

The molecular weight of the above polyethers is not particularly limited, but is preferably about 80 or less in terms of hydroxyl value. The lower limit is preferably about 5. Particularly, a polyoxyalkylene polyol having a hydroxyl value of 5 to 60 is preferable. The number of hydroxyl groups is 1 or more, preferably 2 to 8, particularly preferably 2 to 6.

The polyethers used in the present invention is a high viscosity, kinematic viscosity at 100 ℃ 8000c S t~100
000c S t, in particular, 8000c S t~30000c S
t is preferred.

The quenched oil composition of the present invention contains the above-mentioned polyethers, surfactant and water , and it is particularly preferable that water is solubilized in the system. The water used in the present invention may be any of tap water and industrial water.

As the surfactant, generally, fatty acid soap,
Fatty acid derivatives such as naphthenic acid soaps, higher alcohol sulfuric ester salts, sulfuric ester salts such as fatty acid polyhydric alcohol sulfuric acid ester salts, petroleum sulfonic phon salt, alkylbenzene phon salt, such as an alkyl naphthalene sulfonate Ho phosphate salt sul phon salts, alkyl phosphate salts, polyoxyethylene alkyl phenol ether phosphate salt, anionic typified by phosphoric acid ester salts and polyoxyethylene alkyl ether phosphoric acid ester salt surfactant or poly Polyoxyethylene compounds such as oxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene alkyl amide, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester; Ether, glycerin fatty acid ester, polyhydric alcohol compounds such as sorbitan fatty acid esters, fatty acid ethanol amides, such as non-ionic surface active agents typified alkylol amide compounds such as fatty acid propanolamide.

The proportion of the polyols used in the quenched oil composition of the present invention is preferably 1 to 35% by weight, particularly preferably 1 to 25% by weight. The usage ratio of the surfactant is preferably 1 to 15% by weight, particularly preferably 1 to 8% by weight. The percentage of water used is
50-98% by weight, especially 67-98% by weight, is preferred.

In the present invention, water completely dissolves in the system,
It is a solution which is transparent in appearance and differs from an opaque emulsified state in which water is simply dispersed.

[0029]

EXAMPLES be specifically described by the present invention Example 及 beauty Comparative Example below, the present invention is not limited to these examples.

A quenching test was conducted using the following quenched oil composition containing the following polyether polyol and polyoxyethylene stearate as a surfactant. <Polyether polyol> A: A kinematic viscosity at 100 ° C. of 10 obtained by copolymerizing propylene oxide and ethylene oxide (35/65% by weight ) using diethylene glycol as an initiator.
000C S t polyether polyol B: diethylene glycol as the initiator - co-polymerizing propylene oxide and ethylene oxide (25/75 weight percent) with Le obtained, kinematic viscosity at 100 ° C. 20
000C S t of the polyether polyol C: diethylene glycol as the initiator - co-polymerizing propylene oxide and ethylene oxide (15/85 weight percent) with Le obtained, kinematic viscosity at 100 ° C. 80
000C S t polyether polyol D: diethylene glycol as the initiator - co-polymerizing propylene oxide and ethylene oxide (25/75 weight percent) with Le obtained, kinematic viscosity at 100 ° C. 50
Polyether polyol of 00c S t

<Quenching Test> Test piece (SUJ-2 , diameter 10 mm × length 50 m)
m) was quenched under the following conditions, and the brightness of the object was evaluated.

Atmosphere: N ₂ + H ₂ Treatment temperature: 750 ° C. Treatment time: 10 minutes Oil temperature: 65 ° C. Table 1 shows the composition and evaluation of the quenched oil composition.

[0033]

[Table 1]

[0034]

Since the quenching oil according to the present invention is water-soluble, it has low flammability and is less likely to cause a fire. Also , it has high viscosity and can obtain the same lubricity as conventional products with a small amount of polyether used. Therefore, Ru results in low cost of quenching oil.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ identification symbol FI C10N 40:24 70:00 (58) Investigated field (Int.Cl. ⁶ , DB name) C10M 107/34 C10M 105/18 C10M 173/00-173/02 C10N 20:02 C10N 20:04 C10N 30:00 C10N 40:24 C10N 70:00

Claims (2)

(57) [Claims] 1. A initiator obtained ethylene oxide and having 3 or more monoepoxides carbon is added at a rate of 80 / 20-50 / 50% by weight, and, 8000C kinematic viscosity at 100 ℃ S t~100000c S A quenched oil composition containing the polyethers of t. 2. The quenched oil composition according to claim 1 , comprising a polyether, water and a surfactant.