PL149256B1 - The hydraulic liquid,which burns in a difficult way - Google Patents

Description

PATENT DESCRIPTION 149 256

POLAND

REPUBLIC

FOLK

OFFICE

PATENT

PRL

Patent Additional Patent No. --- Pending: 86 12 04 (P. 262857)

Priority - Application announced: 88 08 18

Patent description published: 1990 06 30

Int. Cl. 4 _C1 0 _M 169/06

Creators of the invention: Lidia Kubiczek, Gerard Bekierz, Ludomir Tokarzewski,

Bogdan Wiślicki, Zbigniew Krasnodębski, Zofia Olearczyk, Mieczysław Rychliński, Jerzy Zawadzki, Bożena Żmijewska, Marian Sosnowski

Authorized by the patent: Institute of Heavy Organic Synthesis "Blachownia, Kędzierzyn-Koźle (Poland)

Non-flammable hydraulic lubricant

The subject of the invention is a non-flammable hydraulic-lubricant fluid, especially for devices operating under medium load.

It is known from the Polish patent description No. 130076, a hydroglycolic, non-flammable hydraulic lubricant fluid with the trade name Rokosol HS, and from the Polish patent description No. 136 426 a hydraulic lubricant fluid with the trade name HSG. These liquids with a viscosity at 50 ° C, equal to 20-45 cP, do not have satisfactory hydraulic-lubricating and anti-abrasive properties. These properties, indirectly assessed in a 4-ball apparatus according to PN-76 / C-04147, and determined by the welding load for these liquids, do not exceed 126 kG. While comparable foreign liquids of this type are characterized under the same conditions with a welding load of up to 250 kg. Their disadvantage is also the presence of a corrosion inhibitor - sodium nitrite, a substance with strong poisonous properties. In hydraulic fluids produced by foreign companies, organic compounds such as morpholine, e.g. according to Canadian patent no. 1,163,041, or polyoxyhydrazine derivatives, e.g. according to US patent specification, are used as corrosion inhibitors. No. 4,317,741 or the addition of an alkali, such as, for example, in Japanese Patent Application No. 0021,387.

The main thickening and lubricating ingredients in foreign hydraulic fluids vary depending on the raw material resources and user requirements. According to the United States patent specification, U.S.A. No. 4,310,436, polymers of ethylene oxide or copolymers of ethylene and propylene oxides, sometimes modified with higher olefins or carboxylic acids, are used. These fluids have very good anti-corrosion properties, but quite poor lubricating properties and a weld load of up to 250 kg.

The aim of the invention was to develop a formula for a hydroglycolic liquid based on domestic raw materials with good anti-corrosion properties without the need to use toxic sodium nitrite and with improved lubricating and anti-wear properties with

149 256 welded - up to 500 kG suitable for work under increased pressure up to lOMPa and at a temperature from -25 to + 70 ° C.

The subject of the invention is a non-flammable hydraulic lubricant, especially for devices operating at medium load, containing in its composition water, glycol, polyglycols, copolymers of ethylene and propylene oxides, corrosion and oxidation inhibitors, and a lubricating and anti-foaming additive. The liquid consists of 5-20 parts by weight of diethylene or dipropylene glycol, 20-30 parts by weight of polyethylene oxide with a molecular weight of 600, 0-30 parts by weight of polyethylene oxide with a molecular weight of 1500.0-20 parts by weight of a copolymer of ethylene oxide and propylene oxide, with the consistency of wax, with the molar ratio of ethylene oxide to propylene oxide as 2-5: 3-7, 0.5-2.0 parts by weight of iron corrosion inhibitors, 0.2-0.5 parts by weight of copper corrosion inhibitors, 0.003-0 03 parts by weight of an oxidation inhibitor, 0.1-0.3 parts by weight of an anti-foaming agent, 1-7 parts by weight of diethanolamine phosphate or a mixture of di- and triethanolamine phosphates and 40-50 parts by weight of water. Iron corrosion inhibitors are salts, esters and amides which are the reaction products of mono, di and triethanolamine and organic acids such as benzoic acid, salicylic acid, cinnamic acid, adipic acid, succinic acid, glutanic acid, sebacic acid, maleic acid, and inorganic acids such as boric acid. The corrosion inhibitor of copper is benzotriazole and its derivatives. The oxidation inhibitors are diisobutyl-p-cresols and phenyl-naphthyl-p-phenyl-diamine. The anti-foaming agent is methyl phenyl silicone oil and its derivatives.

Example I. In 200 g of diethyl glycol and 1450 g of demineralized water in a vessel with a stirrer placed on an electric heater-stove with a heating regulator, 1000 g of polyethylene oxide with a molecular weight of 600, 600 g of a copolymer of ethylene and propylene oxides, 16 g of inhibitor copper corrosion - a commercial product called Reomet 42, which is a methyl-diethanolamine derivative of benzotriazole, 170 g of diethanolamine phosphate, 60 g of monoethanolamine borate, 16 g of methyl-phenyl-silicone oil. The mixture was stirred at 50-60 ° C for 3 hours. Then 0.1 g of phenyl-naphthyl-p-phenylenediamine was introduced, stirred for another 3 hours and left until the next day. The liquid after decanting from a small amount of fine sediment had a viscosity at 50 ° C of 30 cP, an alkalinity of pH 8.5. Lubricating properties according to PN-76 / c-04147 / - weld load equal to 500 kG. The steel corrosion test according to BN-78 / 0535-47 showed a weight loss of 0.08 g / m ^{2 of the} tile after 168 hours at the temperature of 60 °. The copolymer of ethylene oxide and propylene oxide was used, with the consistency of a wax, with a molar ratio of ethylene oxide to propylene oxide of 2-5: 3-7.

An example. Liquid composed of: 1450 g of water, 200 g of dipropylene glycol, 100 g of polyglycol 600, 650 g of ethylene-propylene copolymer as in the example, 1100 g of diethanolamine phosphate, 16 g of benzotriazole, 40 g of monoethanolamine borate, 10 g of methylphenylsilicon oil with the trade name Silpian, 0 . 7 g of diisobutyl-p-cresol with the trade name Topanol. The further procedure was as in Example 1. The product had the following properties: viscosity at 50 ° C - 32.1 cP, pH - 9.0, steel corrosion +0.08 g / m2, copper corrosion - 0.04 g / m2. Welding load 400 kg.

Example III. 400 g of polyethylene oxide with a molecular weight of 600 and 800 g of polyethylene oxide with a molecular weight of 1,500 were added to a solution of 800 g of dipropylene glycol in 1,450 g of water heated in a mixer to 60 ° C. 16 g of the methyldiethanolamine derivative of benzotriazole, named as commercial Reomet 42, 65 g of monoethanolamine benzoate, 16 g of methyl-phenylsilicone oil with the addition of non-ionic agents as an anti-foaming agent, under the trade name Roksil, and 100 g of diethanolamine phosphate, and after thorough mixing, diisobutyl-p-cresol under the trade name Topanol was introduced in the amount 0.07 g. The mixture was stirred at 50-60 ° C for another 4 hours and allowed to stand for 36 hours. After standing, a clear liquid was obtained with a viscosity at 50 ° C equal to 34 cP, steel corrosion test was +0.04 g / m2, copper corrosion -0.01 mg / m2, weld load 315 kG.

149 256

Example IV. Triethanolamine maleate was added to the solution prepared as in Example 3 as a steel corrosion inhibitor in the amount of 70 g per 3,500 g of the finished solution and 0.1 g of phenyl-naphthyl-p-phenyldiamine under the trade name Ipognox-66. Steel corrosion was +0.15 mg / m ² , welding load 350 kg.

Claims (1)

Patent claim Low-flammable hydraulic-lubricating fluid, especially for devices operating at medium load, containing in its composition water, glycol, polyglycols, copolymers of ethylene and propylene oxides, corrosion and oxidation inhibitors as well as a lubricating and anti-foaming additive, characterized by the fact that it contains 5-20 parts by weight of diethylene or dipropylene glycol, 20-30 parts by weight of polyethylene oxide with a molecular weight of 600, 0-30 parts by weight of polyethylene oxide with a molecular weight of 1,500.0-20 parts by weight of a copolymer of ethylene oxide and propylene oxide, wax consistency, with a ratio of molar ethylene oxide to propylene oxide such as 2-5: 3-7, 0.5-2.0 parts by weight of iron corrosion inhibitors such as salts, esters and amides being the reaction products of mono-, di- and triethanolamine and organic acids, such as benzoic, maleic, salicylic, cinnamic, adipic, succinic, glutaric, sebacic acid and inorganic acids such as boric acid, 0.2-0.5 parts by weight and copper corrosion inhibitors, such as benzotriazole and its derivatives, 0.003-0.03 parts by weight of an oxidation inhibitor such as diisobutyl-p-cresols and phenyl-naphthyl-p-phenyl-diamine, 0.1-0.3 parts by weight anti-foaming agent, such as methyl phenyl silicone oil and derivatives thereof, 1-7 parts by weight of diethanolamine phosphate or a mixture of di- and triethanolamine phosphates and 40-50 parts by weight of water.