SU551355A1 - Conductive plastic grease - Google Patents

Description

(54) ELECTRICAL WIRING PLASTIC GREASE

one

The invention relates to greases having a high electrical conductivity and used during the operation of the sliding contacts of the welding assembly of electrical resistance seam welding machines, as well as in instrument technology and the radio engineering industry.

Known plastic grease based on mineral oil, sodium soap, fatty acids, fillers and additives.

Also known is a metal-plated lubricant for electric welding seam machines, which is Ciatim-201 lubricant with the introduction of 10% copper powder or 1O% bronze powder in its composition.15

However, these lubricants are ineffective, as they burn in the process.

A well-known plastic lubricant with increased electrical conductivity, based on 20 oligonitrile siloxane liquid, quenched with silica gel, modified with butyl alcohol, with the introduction of additional thickener - bentonite, modified dimethyldioctadecylammonium, and additives. 25

This grease reduces the electrical resistance and improves the contact properties of the grease.

The formulation of this lubricant includes 2-5 wt. % butosil, 10-2O weight. % of bentonite, additives as a dispersion medium - oligonitrile siloxane liquid with viscosity 50 eats at 20 C.

However, this ratio of lubricant components makes it impossible to manufacture reliquaries with sufficient mechanical stability and adhesion to metal surfaces, since the main smothering component is silica gel, and its concentration in the prescription composition is insufficient when thickening a 50 Å organic polyorganosiloxane liquid to obtain a plastic lubricant with good mechanical properties.

An additional thickener is bentonite, even at a concentration of 20 wt. It has little effect on the creation of a plastic system, since it does not swell well enough in polyoroganosiloxane fluids. Bentonite in this formulation improves contact. properties of grease due to a decrease in electrical resistivity. However, despite the increased electrical conductivity, this lubricant is unsuitable for use in the operation of electrical resistance seam welding machines, since it does not have the required mechanical and mechanical properties and adhesion to metal surfaces, and as a result, it drains from the surfaces of the sliding contacts of the electrode devices. causes significant oxidation and scoring of contacting surfaces. The purpose of the invention is to develop a prescription composition of an electrically conductive grease with high mechanical and mechanical adhesion, anti-wear and anti-wear properties ensuring the normal operation of the sliding contacts of the welding unit of electric seam welding machines. The goal is achieved by the fact that the proposed lubricant based on polyorganosiloxane liquid, modified silica gel and additives additionally contains crystalline potassium or sodium carbonate, polyethylsiloxane liquid with viscosity 200 is used as polyorganosiloxane liquid with a viscosity of 200 eats at 2 ° C, and as additives, castor oil and 1 p-nitrophenyl-1,3-dioxy-2-aminopropane (dextramine). Silica gel modified with dimethyldichlorosilane can be used. The proposed lubricant has the following ratio of components, weight. %: Silica gel modified with dimethyldichlorosilane, brand AM-1-3 O O Potassium or crystalline carbonate sodium (kgCOj-10 or Mad, COj. 10 HgO; 0.75-1.50 Dextramine Castor Oil Polyethylsiloxane liquid (No. 5) with viscosity 2OO eats at 20 The remaining Lubricant is prepared as follows: In the apparatus, equipped with a mechanical agitator and a homogenizer, when the agitator is switched on, the calculated amount of castor oil and polyethylene siloxane liquid No. 5 is heated to 100 ° C and the calculated amount of dextmin is introduced a, move 2–3 hours, after which they cool to 30 ° C and the calculated amount of crystalline potassium carbonate or sodium and silica gel AM-1-300 is introduced.Mixing and circulation of the mixture in the apparatus through the homogenizer is continued until full visual uniformity of the lubricant is achieved, then the finished product is drained through the filter into the container.Example: According to the described technology, a lubricant (No. 1) of the following composition is obtained, wt.%: Silica gel modified with dimethyldichlorosilane, AM-1-300 brand K crystalline carbonate. 10 Well, About Dextramine Castor Oil Polyethylsiloxane liquid No. 5 with a viscosity of 2 00 eats at 20 A lubricant (No. 2) of the composition, weight, is prepared by the same method. %: Silica gel modified with dimethyldichlorosilane, brand AM-1-30015 Sodium crystalline carbonate agi CO, 10 N., 0 Dextramine Castor oil Polyethylsiloxane liquid No. 5 with a viscosity of 200 eats at 20 ° C. Else For comparison, the composition was prepared (grease No. 3) with the same ratio of components as in example 2, but without the introduction of the ugi. acid salt. The resulting lubricants No. 1-3 were tested for performance. For comparison, the following lubricants were subjected to the same tests: PIATIM-201 with 10% copper powder (lubricant No. 4); CIATIM-201 with 10% bronze powder (lubricant No. 5) composition containing 30 wt. % flake graphite and 70 weight. % of castor oil (grease No. b); known lubricant based on oligonitrile siloxane liquid thickened with modified silica gel and bentonite (lubricant No. 7). The test results are presented in the table.

anti-wear, extreme pressure and adhesive properties, it complements with a viscosity of 200 and eats at 2 ° C

Rest