SU1479492A1 - Process lubricant for cold pressure-working of metals - Google Patents

Abstract

The invention relates to metalworking, in particular process lubricants used in cold forming processes for metals. The goal is to increase the anti-seize and antifriction properties, as well as to increase the stretching force. The lubricant contains, in wt.%: Atactic polypropylene modified with β, β - dichloroethyl ester of vinylphosphonic acid 5-10

polyoxyethylene monoethanolamide ester of synthetic fatty acids fraction С ₁ 0-С ₁ 6 0.4-0.5

mineral oil else. The use of technological lubricant provides a critical load of up to 1,800 N, a welding load of more than 10,000 N, a spot diameter of wear of 0.45 mm, a stretching force of 28.45 N. Table 2.

Description

The invention relates to metalworking, and more specifically to process lubricants used in cold pressure metal forming processes.

The purpose of the invention is to increase the anti-seize properties by increasing the critical load and welding load, increasing the anti-friction properties while reducing the coefficient of friction and increasing the stretch strength of the cold metal working.

In the proposed lubricant, the modified atactic polypropylene p, B-vinyl diphosphinic acid dichloroyl ester (viniphos), serves as an anti-seize and anti-wear additive. Winifos

in the presence of tert-butyl perbenzonate, it is grafted onto atactic polypropylene.

The introduction of the initial viniphos1 as an additive to the lubricant is not possible because of its high volatility and incompatibility with oil and polymeric additives. At the same time, vinylphos, grafted onto macromolecules of attacked polypropylene, is soluble in oils and significantly improves the extreme-pressure and anti-wear characteristics of the composition.

The processes of modifying the atomic polypropylene with its face in the presence of a tertbutylperbenconate are carried out with vigorous stirring and gradual heating of the reaction

WITH

ka

J14

torus to 150-160 ° C. At this temperature, the composition is kept for 0.5 h. Then the excess of the log is distilled off at 137 ° C and a pressure of 4 mm Hg.

As studies have done, the optimum phosphorus and chlorine content in the modified polymer is 6.3 and 13.1%, respectively. A further increase in the content of these elements is impractical due to the deterioration of the solubility of the modified polymeric additive in mineral oil.

The preparation of a process lubricant based on modified atactic polypropylene is carried out by dissolving the polymer additive in mineral oil K-12A at 140-150 G with constant stirring. The calculated amount of polyoxyethylated monoethanolamide ester of synthetic fatty acids (FFA) of the С 10-Cj6 fraction.

For the tests, technological lubricants were prepared, the composition of which is given in Table 1.

The formulations prepared are homogeneous, dark beige viscous liquids.

containing mineral oil, a polymeric additive and a surfactant, characterized in that, in order to improve anti-friction and anti-friction properties and stretching, the lubricant contains atactic polypropylene, modified, as a polymeric additive,

(Z.-dichloroptil ether) Comparison results of Finic acid, and as a surfactant contains polyoxyethylated esy of monoethanolamide synthetic fatty acids of fraction С10-С, with the following component ratio, wt.%: The formulations of technological lubricants on the four-ball friction machine and the Engelhardt machine are given in Table 2. As a known technological lubricant of the following composition (composition 6), wt.%:

Polyethylene mol. masses

10,000-14,000 modified with peroxide

laurila5.0

Hexachloro-paraxylene 3, 0

Lauryl peroxide 0.8

Triethanolamine

45

50

flax, modified

ft p-dichloroethyl

ether winnoline

acids 5-10

Polyoxyethylated

eLir monoethanolamide

synthetic fatty

Acids Lraction Cto-Cn6 Q, 4 - 0.5

Mineral oil Rest

salt of oleic acid 0.75

Triethanolamine 0.25 Mineral oil Up to 100 From Table 2 it can be seen that the technological lubricants offered have higher values of the critical load and welding load and, accordingly, a lower coefficient of friction and stretching force. An increase in the concentration of the modified polymer additive in the composition of the lubricant over 10% leads to a significant increase in viscosity and, accordingly, to a deterioration of the technological characteristics of the compositions. In contrast to the known lubricants, the proposed formulations have a higher stability over the entire range of temperatures used.

Claims (1)

Invention Formula Technological lubricant for cold forming containing mineral oil, a polymeric additive and a surfactant, characterized in that, in order to increase the anti-friction and antifriction properties and stretching power, the lubricant contains atactic polypropylene, modified, as a polymeric additive, (Z.-dichloroptil ether vrpilfos flax, modified ft p-dichloroethyl ether winnoline acids 5-10 Polyoxyethylated eLir monoethanolamide synthetic fatty Acids Lraction Cto-Cn6 Q, 4 - 0.5 Mineral oil Rest Table 1 Editor. Nedoluzhenko Compiled by E.Ponomareva tehred A. Kravchuk Proofreader N. Korol Order 2502/24 Circulation 446 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and publishing plant Patent, Uzhgorod, st. Gagarin, 101 Table 2 Subscription