CS250007B1 - Complex calcium-based grease - Google Patents

Abstract

The invention relates to the production of calcium complex plastic lubricant for rolling and sliding bearings usable at temperatures from -30 to 100 °C, short-term up to 140 °C in industry and transport. The essence of the invention is the composition of the lubricant using petroleum oil from sulfur paraffin oil and complex soap with improved Theological and exploitation properties, using modifiers of the structure of the plastic lubricant. The invention can be applied in the production of plastic lubricants at Slovnaft Bratislava.

Description

250007 3

The invention relates to a complex calcium-plastic lubricant.

In principle, a grease thickened in a rigid structure is thickened with a grease by thickening agents, such as higher fatty acid soaps in the majority of greases. Calcium complex plastic grease includes low molecular weight acids, e.g., acetic acid and high molecular weight acids, e.g., C 1 to C 18, with high dropping points, high thickened capacity, stability to mechanical disruption at high speeds and loads , high and very good colloidal heat stability, higher point drop and other properties, which grease is predetermined for the purpose of use.

These good characteristics justify the small size of the anisotropic dispersion phase of the calcium complex soap with high melting point in regeneration. In order to avoid the formation of viscoelastic gels, it is advantageous to use suitable structure modifiers with optimum selection of the low molecular weight acids to high-molecular acids, the thickener content and the production technology in order to make the complex complex grease useful in demanding friction nodes of different mechanisms under any conditions, as well as start-up, as well as taking care of low-temperature, low-temperature and low-temperature conditions.

It is generally known in the world to produce complex greases of sulfur-paraffinic, also from patent and specialist literature, and to improve their exploitation properties by various polymers. Among the proven components that improve colloidal and mechanical stability are polyethylene, polyvinyl chloride, polytetrafluoroethylene, atactic polypropylene, polyisobutylene, garbacryl and others.

In the preparation of the calcium complex lubricant according to the invention, it has been found to be desirable to improve the theological and exploitative properties of the coating in difficult working nodes of different mechanisms and at working temperatures of up to 100 ° C, short-term jpri 140 ° C, solubilized only with a combination of sulfur-paraffinic petroleum oil with a polyalkyl methacrylate thickened additive, and / or ethoxylated alkylphenol and / or anactic polypropylene.

A complex calcium-based grease usable at temperatures from -30 to 100 ° C, short-term to 140 ° C, is characterized in that it consists of 10 to 25% by weight, preferably 13 to 20% by weight, of a 10 to 20% by weight high molecular weight acid. 20% by weight, preferably 10 to 15% by weight of low molecular weight acids, 70 to 85% by weight of sulfur-paraffinic petroleum oil having a viscosity of 60 to 70 mm 2 s -1 at 50 ° C, viscosity index 25 to 85, with a freezing point of -10 to -15 ° C, an acid number of 0.001 to 0.050 mg KOH / g, a flash point of 220 to 250 ° C, a sulfur content of 0.5 to 1.2% by weight, from 0.1 to 2.5% by weight, preferably 0.3 to 1.0% by weight of a mixture of alkylaromatic amines, and / or from 0.1 to 15% by weight, preferably 0.5 to 3% by weight. atactic polypropylene and / or 0.1 to 2.5% by weight, preferably 0.2 to 1.5% by weight, of ethoxylated alkylphenol, Ό, Ι to 1.0% by weight, preferably 0, 1 to 0.5% by weight oxidation inhibitor and 0.1 to 1% by weight oxidation inhibitor; resinol red. The calcium-based complex plastic grease of the present invention is a multi-purpose, semi-thin, short-fiber, smooth-colored, red-colored. It is intended for use in ball and sliding bearings in industry and in transport, for a working temperature range of -30 to 100 ° C for a short time up to 140 degrees C. Example 1 Calcium complex grease is prepared in a laboratory reactor equipped with a powerful counter-rotating stirrer, in which 936 g of sulfur-paraffinic petroleum oil having a viscosity of 64.74 milligrams-1 at 50 ° C with a viscosity index of 85, with a freezing point of -11 ° C and an acid number of 0.038 mg of KOH / g, are dissolved; 78 g of stearin III, 78 g of olein saponification, 267 g of lean hydrate, 3 g of oxyethylated or alkylphenol, 3 g of atactic polypropylene, 15 g of methacrylic acid copolymer. This mixture is thoroughly stirred at 30 ° C for 15 minutes, then successive acetic acid is added in a total amount of 342 g. Upon completion of the acetic acid dosing, the batch is heated to 150 ° C with stirring. at the end of the saponification phase at 160 ° C, 1,404 g of petroleum oil of the same quality as in the feed was added.

The reaction mixture is heated to 200-210 ° C for 1 hour. After the heating is switched off, stirring is continued until 128 ° C, then 30 g of alkylated aromatic amines, 9 g of 2,6-di-tert-butyl-4-methylphenol a1 are added. , 5 g resinol red. The addition of additives was continued by stirring until the temperature was 40 ° C, then the plasticizer was pumped through the homogenizer into the containers.

Qualitatively, the plastics indicators of Example 1 and the Comparative Samples A and B shown in Table 1 show that the plastic grease of Example 1 has an improved oilabsorbency property compared to Comparative Samples A and B; .mechanical-dynamic properties (SKF test, run B, 100 ° C). , 7 5 Ο δ O 7 T a .b u 1 ', k and 1

Comparison of the properties of the calcium-complex greases of Example 1

Akostný ukazovate! Grease according to the invention Comparative sample A B Penetration at 25 ° C alcohol 1 mm 268 285 298 Drop point ° C min 240 225 215 Oil separation test: at 24 h at 100 ° C in% by weight 1.1 1.79 1.46 in 24 h at 150 ° C in% ihm. 4,51 4,85 5,61 Corrosion test: on a steel sheet negative negative negative on a copper sheet negative negative negative Determination of wettability in the deposit, decrease in% wt. max. 25,1 30,75 33,38 Clearing mechanical impurities absent absent absent SKF - lifetime test (480 hj, running B - 100 ° C satisfying unsatisfactory non-compliant Example 2 Continued stirring after heating is complete) Calcium complex lubricant is prepared by laboratory a reactor equipped with a powerful counter-rotating stirrer into which 2,340 g of sulfur-sulfur-oil petroleum oil has been dissolved, after a viscosity of 64.74 mm 2 s -1 at 50 ° C, with a viscosity index of 85 with a solidification point of -11 ° C and an acid value of 0.038 mgKOH / g 78 g of stearin III, 78 g of olein, 270 g of calcium hydrate, 3-oxyethylated alkylphenol, 15 g of methacrylic acid copolymer.

To the batch, 342 g of acetic acid is added in portions without stirring, and the reaction mixture is heated to 200 DEG to 210 DEG C. for 1 hour to 120 DEG C., then 30 g are added. mixed alkylated aromatic amines, 15 g2.6 xylenol alkylated polypropylene and 1.5 gresinol red. After the addition of the additives, stirring is continued and at a temperature of 40 ° C, the grease is pumped through the homogenizer into the containers.

Qualitatively, the plastics indicators of the invention of Example 2 and of Comparative Samples A and B shown in Table 2 show that the grease of the present invention has improved in comparison to samples A and B The oil-absorption property has satisfactory mechanical-dynamic properties [SKF test, run B, 100 ° Cj.

Table 2

Comparison of the properties of the calcium-complex greases of Example 2

Akostný ukazovate! Grease Comparative sample

according to the invention A B

Penetration at 25 ° C 10_1 mm 270 285 298 Drop point ° C min 238 225 215 Oil separation test: at 24 ° C at 100 ° C in% wt. 1.04 1.79 1.46 in 24 h at 150 ° C in% ihm. 4,62 4,85 5,61 Corrosion test: on a steel sheet negative negative negative on a copper sheet negative negative negative Determination of washability in a deposit, decrease in% wt. max. 24,8 30,75 33,38 Mechanical impuritiesintentional absence absent absent SKF - lifetime test (480 h), run B - 100 ° C conforms unsatisfactory not satisfactory

Claims (1)

.230007 SUBSTITUTE Lime-grease complexes usable at temperatures from -30 ° C to 100 ° C, short-term up to 140 ° C, characterized in that it consists of 10 to 25% by weight, preferably 13 to 20% by weight, of solid phase formed by high molecular weight acids. from 10 to 20% by weight, preferably from 10 to 15% by weight, of low molecular weight acids, from 70 to 85% by weight of mineral oil of sulfur-paraffinic oil by a viscosity of 60 to 70 mm2s -1 at 50 ° C, viscosity index 25 to 85, with a pour point. 10 to -15 ° C, an acid number of 0.01 to INVENTION 0.050 mg KOH / g, a flash point of 220 to 250 ° C, with a sulfur content of 0.5 to 1.2% by weight, from 0.1 to 2.5% % by weight, preferably 0.3 to 1.0% by weight of a mixture of alkylaromatic amines, and / or 0.1 to 15% by weight, preferably 0.5 to 3% by weight of atactic polypropylene and / or 0.1 to 2.5% by weight is preferably 0.2 to 1.5% by weight of ethoxylated alkylphen nol, 0.1 to 1.0% by weight: preferably 0.1 to 0.5% by weight of the oxidation inhibitor and 0.1 to 1% by weight of resinol red. Severografia, n. P., Závod 7, Most Price 2,40 Kcs