SU679151A3 - Hydraulic liquid - Google Patents

Description

(54) HYDRAULIC FLUID The filter is clogged and the fuel filter is excessive in normal operation, and the filter is mixed and therefore requires premature cleaning and changing of fluids in the system. Contamination with particles of metal can also lead to changes in the physical and chemical properties of functional fluids. The presence of contaminants in the form of metal particles in liquids reduces their oxidative stability, resulting in significantly deteriorating performance of liquids. In addition, contamination of liquids with metal particles causes a change in viscosity, an increase in acidity, precipitation, reduced chemical stability and discoloration. A mineral-based hydraulic fluid containing an alkylphosphoric acid ammonium salt in an amount of d, 01-5 wt.% (1) is known. This additive imparts hydraulic fluid lubricating and frictional properties. However, this hydraulic fluid does not prevent erosion. The aim of the invention is to prevent erosion of the metal surface. The goal is achieved by the fact that the hydraulic fluid, including mineral oil and an additive, additionally contains an ester of phosphoric acid and, as an additive, an ammonium phosphoric acid salt of the general formula R 2d7-T R-ir-K where R, R, R, and R are alkyl , arylalkyl and Cj - € 30 aikenyl or R and R together form a ring or heterocycle with oxygen, nitrogen, or their mixture; X is oxygen; Y. -C, -Szo-alkoxy, alkenyloxy, Ci-Szo Alkyl1, carbo, hkoxyalkyl, phenylalkyl, phenoxy and alkylphenoxy; and m 1 and 2, with the following ratio of components, the ammonium salt of phosphoric kislotyO - 15 Mineral maslo9,9-70 Ether phosphoric kislotyDo 100 Preferred ammonium salts of phosphorus acids GOVERNMENTAL: diphenylphosphate geksadetsiltrimelilammoni diphenylphosphate didodecyldimethylammonium diphenylphosphate iidetsiltrime yl ammonium Difenilfosfag dimetilpropildodetsilammoni diphenylphosphate dodecylammonium Difekilfosfat dodetsiklobenziltrimetaaammoni diphenylphosphate nonylphenyltrimethylammonium Diphenylphosphate phenyldodecadpammonium Diphenylphosphate allyltributylamm they diphenyl phosphochloridate trimetilgeksadetsenilammoni bis (dodecyltrimethylammonium) Bis (dodecyltrimethylammonium) phenylphosphate Bis (octadecyl) phenylphosphate Bis (fenildodetsildimetilammony) phenylphosphate dimethylphosphate detsiltrimetilammoni Methyl phosphate didodecyldimethylammonium Bis (didodecyldimethylammonium) dibenzyl methylphosphonate dimethylphosphate dodecyltrimethylammonium dodecyltrimethylammonium Metilfenilfosfat dodecyltrimethylammonium bis (nonylphenyl) phosphate, dodecyl dodecyltrimethyl Difeiilditiofosfat rimetilammoni Difenilditiofosfat dioktilmetilammoni Difenilditiofosfat feshshdodetsildimetilammoni diethyl dithiophosphate dodetsaptrimetilammoni diethyl dithiophosphate phenyltrimethylammonium Diallilfosfat dodecyltrimethylammonium dodecyltrimethylammonium diphenyl di-n-dodecyl didodecyldimethylammonium Di-n-dodecyl dodecyltrimethyl dioctyl dioktilmetilammoni Diokttshfosfat triokailammoni Metilfenilfosfat phenyltrimethylammonium Metilfenilfosfat benzyltrimethylammonium Metilfenilfosfat trimetilgeksadetsen lammoni ethyl phosphate bis (trioktilammoni) diphenyl octadecyl diphenyl tridetsilgrimetilammoni geptadetsiltrimetilammoni diphenyl di-n-butilditiofosfat nonilfeniltrimetilammoni Dibenzilditiofosfa benzyltrimethylammonium dimethylphosphate hexadecyltrimethylammonium diphenylphosphate trioctylmethylammonium dimethylphosphate geptadesh ltrimetilammoni diphenylphosphate tris (n-tridecyl) -metilammoni 1ris- diphenylphosphate (n-dodecyl) -metilammoni diphenylphosphate tris (isoconyl) -methylsilane 5 t Methyl methylphosphonate triethyl methylammonium diphenyl-1,3,5 trimetilpiri apos Dibutyl phosphate N-methyl, N-bytilIIIperidina. CHjTjCS NCH3 (C6H50) jPOjl2 Tsifensh1fosfat 2-etilgeksildimetildodetsilammoni diethylphosphate dimetiletildodetsilammoni dibutyl dimetilbutildodetsilammoni dimethylphosphate geksadetsildimetiletilammoni dibutyl tris- (drdetsil) -butilammoni Metiloktilfosfonat tetramethylammonium Metiloktilfosfonat trimethylbenzylammonium Metilgeksadetsilfosfonat tetramethylammonium i8 «i7 JioH2iO-CMetilgeksadetsilfosfonat benzyltrimetilammoni Yetil- tert-butylphosphonate tetramethylammonium methyl-tert-butylphosphonate benzyltrnmethylammonium methylcarbomethoxymethyl tetramethystha

58Wi7 JioH2iO-C-fKCH

C8Hi7CioH2iO-c-- CHj ((; H30) (CH3) po7

-YU

CHzO

KH o-d- irCHj

"K,

Quaternary ammonium salts of phosphoric acid diesters that do not contain an N-H bond can be obtained by a known method.

IIr-i p - -I

(C9Hi9CeH40) 2P02

five

(SbN50) 2P02

,

(C9Hi9CeH40) 2PO, j

iCHjouch ,,) P02

CH-.

The compositions of functional fluids to which ammonium salts of phosphate are added are called base solutions of these salts in functional

The fluids change depending on the oi KOHKJICT function of the system and the type of funkilopal. liquids so as to prevent and regulate disruption. Thus, it has been established that the effect of the additive, i.e. the ammonium phosphoric acid concentrate required to prevent and control the degradation caused by the baseline BopOM varies with the composition of the base solution or the mixture of base solutions used.

For example, for base solutions used in hydraulic fluids according to the invention, the concentration of ammonium salts of phosphoric acid is 0.01 -

15 wt.%, And the optimal concentration value will be such that it will be possible to effectively prevent and regulate the destruction. The preferred value of the concentration of additives 0,025-5.0 wt.%, And the most. preferred 0.1-0.5 wt.%. Therefore, all compositions according to the invention include a functional fluid and an anti-depletion amount of the ammonium salt of phosphoric acid, I.e. an ammonium salt is added in an amount sufficient to prevent and control disruption. The composition of the functional fluids according to the invention is obtained by adding the ammonium phosphoric acid salt to the base solution with stirring to form a liquid composition.

Compositions obtained in accordance with the invention with the invention can be created on the basis of a wide variety of base solutions. However, it is preferable to combine the composition made according to the invention, including the phosphoric acid ammonium salt, with a basic solution, which is a functional liquid based on phosphate ester. The basic solution includes, first of all, trialkyl phosphates in the amount of 50-95 wt.%, Preferably in the amount of 60-90 wt.%. Optimum results are achieved with the use of such alkyl alkyl phenols, in KOTOpbtx, each of the alkyl groups contains 1-20, preferably 3 - I2 carbon atoms. Alkilnge group and preferred configuration, corresponding to 1C1 straight chain. Single trialkylphosphate: may contain an alkyl group in all three positions of the poly or may include a mixture of different alkyl groups. Mixtures of various trialkyl phosphates can also be used. Suitable trialkylphenes

Trialkyl phosphates can be combined with triaryl phosphates or mixed alkyl aryl phosphates. Predpochtitelngmi 1riarilfosfatami are tricresyl phosphate, krezildifeG1shgfosfat, trig silenilfosfat, tert-butilfenilfenilfosfaty, etilfenildikrezilfosfat or isopropyl / gfenilfosfat, fenpgg-bis (4-a-megilbenzilfenil) phosphate, difenildetsilfosfat, dlfeniloktilfosfat, metildifenilfosfat, butildikrezilfosfat and other similar compounds. Preferably, a base solution containing predominantly trixylenyl phosphate is used. Triarylphosphate is suitable as thickeners for trialkylphosphates. They can be used in an amount of 0-35% by weight, the preferred concentration of triaryl phosphates is 5-30% by weight of the composition. In order to provide the desired viscosity, standard polymer thickeners or reagents that improve the viscosity index (VI) can be used, which are mixed with a mixture of trialkyl phosphate and triaryl phosphate compounds. Typical thickeners that can be used include polyacrylates, polymethacrylates, polyethylene, polypropylene oxides, polyesters, and compounds like them. ,

As a thickener, it is preferable to take polyester based on azelaic acid and daole, such as propylene glycol, and similar compounds, the concentration of which is 3-20% by weight.

Hydrocarbon oils, including mineral oils, which are extracted from oil fields, and artificial hydrocarbon oils are also suitable base solutions. The physical characteristics of the functional fluids derived from mineral oil are selected based on the requirements associated with the systems in which these fluids will be used, therefore the hydraulic fluid of the invention includes natural oils as base solutions, the viscosity of which varies over a wide range, as well as the content of volatile components in them, such as naphthenic base, paraffin base and mixed base solutions based on natural oil.

The liquid compositions according to the invention, when used as functional Hjjix fluids, may also contain acid acceptors, dyes, temperature lowering agents, thickeners, antioxidants that prevent the formation of our reagents, reagents that improve viscosity index, such as polyalkylacrylates, polyalkyl methacrylates, polycyclic polymers, polyurethanes, polyalkylene oxides, and polyesters, lubricants, water, and other compounds. Combinations of antioxidants and / or acid acceptors, the concentration of which is 0.1–5.0 wt.%, In particular for epoxides and / or amines, may also be included in the composition of the functional fluid. A very effective combination has been found to be co, becoming containing 3,4-epoxycyclohexylmethyl, 3,4-epoxycyclohexane carboxylate and phenyl-anaftilamine. Corrosion inhibitors, taken in a concentration of 0.001-0.5 wt.%, Can be added to the mixture and carefully moved in it. The composition may be so; I have introduced and carefully diluted the dye in a concentration of 5–20 parts per million, and the mixing is carried out in a standard way. Effective amounts of an anti-foaming agent may also be added. Hydraulic fluids produced according to the invention may include up to about I wt.% Water. However, the preferred water content in them is less than 0.6%. 7 and most preferably less than 0.3% by weight. Сг Example 1. A basic solution containing 78.98% by weight of tributylphosphate and 9.70% by weight of mixed krsyl- and xylenylphosphates Saybalt viscosity at 38 ° C, mixed with 9.00 wt.% thickened based on polyester. Thereafter, 1.0 wt., 3,4-1uroxycyclohexane carboxylate and 1.0 wt. Are added with stirring to the resin. Feni; -a- afpla spar with thorough mixing of 0.02% by weight of benzochriazole together with a standard dye and a foaming reagent, which is taken in the amount of 20 and 15 hours per 1 million, co-1ve1C1 is fine. Further, dodecyl trimethyl ammonium diphenylphosphate is introduced into the mixture under stirring at various concentrations, including 0.1 and 0.3 wt.%. The composition obtained by the abovementioned meiudica is used in an effort that contains the flap valve of the leading edge of the Boeing 737 itself, which is under the pressure created by the pump with the axial piston of the Vickers system together with the equipment attached to Het. The evaluation of the properties of a fluid is carried out by increasing the rate of its leakage in the valve when it is closed or zero. Table 2 shows the results of the addition of dodecid trimethylammonium phosphate ester dagfeschstyphosphate to a liquid based on phosphate ester. 1. The test results indicate that the introduction of ester, phosphate, and a certain amount of dodecyltrimethylammonium into the hydraulic fluid, prepared on the basis of an ester, prevents the destruction of hydraulic systems. EXAMPLE 2 An erosion test was carried out on curve 1 using a liquid derived from a phosphate ester. Adding 0.3% by weight of dodecyltrimethylammonium diphenyl phosphate. At the same time, the concentration of chlorinated solvents was gradually increased to a final chlorine content of 2000 hours per 1 MJTH. The test results are given in trl 2 The obtained results illustrate the suitable diphenyl phosphate dodecyl trimethylammo S5 to prevent damage caused to the hydraulic system by phosphate-ether-based hydraulic liquids contaminated with chlorine. EXAMPLE 3: Fja erosion is carried out with the use of 1 hydraulic fluid 1) of a hydraulic fluid of the brand BMS 311-C for flying machines, prepared on the basis of phosphate ether contaminated with chlorine, the concentration of which is 1000 ppm. xjrop comes in the form of 1,1,1-trichloro-1a. After determining the rate of erosion, phosphate-based liquid portions of the liquid are added to the contaminated liquid; in the example. 0.3 weight; Dg.phenylphosphate dodecyltrimethylammonium. The test results are shown in Table. 3. The results obtained indicate the suitability of additives containing diphenylphosphate dodscyltrimethylammonn to prevent disruption caused in the hydraulic system of hydraulic fluids by chlorine-based phosphate ester. EXAMPLE 4. Pr erodeskii tests for erosion, similar to those which are ocyuiecTBHH in example 1, 0.3% by weight of mixed mono- and bis (dodemic lammonium) -metal phosphates are added to the liquid. These tests indicate the suitability of mixed mono- and bis (dodeshammonium) methylphosphates to prevent the destruction caused by phosphate ester in hydraulic systems. Conductivity. Environment by adding em 0.021, and after the addition of pepy 0.24 µOhm / cm. EXAMPLE 5. Prepare a mixture similar to the one described in Example 1. Two different liquids are prepared on the basis of this mixture. The first one contains 0.2% by weight of diphosphate phosphate before the stroke and acetic acid, and the second contains 0; 2% by weight of dimethylphosphate trnoctylmedophosphonium. EPT fluid; tested for |: temperature stability by the method. firms Boeing 311-C. The results are given in Table. 4. Test conditions: temperature 12ГС, duration 168 h, steel, magnesium, steel with cadmium, copper and aluminum are present as catalysts. These tests show that liquids based on dodecyl trimethyl ammonium diphenyl phosphate are characterized by a higher temperature and oxidative stability (lit) compared with liquids prepared on the basis of trioctyl methyl phosphonium dimethyl phosphate. Example 6. In the erosion test, which was carried out according to the procedure described in Example 1, it was found that a liquid based on polyphenyl ether containing a mixture of m- and p-pentaphenylenetetraoxides and 0.2 wt.% Bis (up to decylbenzylgrymethylammonium) phenyl phosphate will have less of a destructive effect on the metal compared to the same

40 (basic level) 275 (in the form of CHjCCIj 444 (in the form of SIZSS)) 938 (in the form of CHjCCU;

2000 (as CHjCClj and CFzCICCIjF

The percentage of liquid based on phosphate ester, including 0.3 wt.% Diphenyl phosphate dodecyltrimethyl mmonium

Missing 20

table 2

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Table 3

Leak rate, cm / min / h

6.0 6.0 liquid, but not containing phosphonate bisammonium. Example. In the erosion test, which was carried out according to the procedure described in Example 1, a liquid comprising approximately 85% of an artificial hydrocarbon oil, 15% trimetn-polypropantrypthepanoate and 0.2% didodecyl dimethyl phosphate diddestate less than the same liquid containing ammonium phosphate. Example B. As a result of using erosion, which was carried out as described in Example 1, it was found that a liquid containing approximately 50% alkyl phosphate ether, 40% aromatic natural oil, 10% pentaerythritol tetraheptanoate and 0.2% nonylphenyl trimethylammonium dioctyl phosphate, less destroy metal compared to the same liquid, but not containing ammonium phosphate. Table