Polymer composition for anti-friction coatings
(57) Abstract:The invention relates to the field of technical chemistry, and more specifically to polymer antifriction materials used in mechanical and instrument engineering as anti-friction coatings. The invention can be used in friction units of parts and machines working in air at 25 - 500oC. the Invention enables the manufacture of anti-friction material coating with a stable coefficient of friction at 25 - 500oC and high wear resistance up to 400oC. the Composition comprises (wt.h): polyaminoamide - 23, graphite - 1-30, N-220, an organic - 1000. table 2. The invention relates to the technical chemistry, and more specifically to polymer antifriction materials used in mechanical and instrument engineering as anti-friction coatings.The invention can most effectively be used in machine building and instrument making in the friction of the parts and machines operating at a temperature of 25 500oC.Known anti-friction composition, selected as a prototype containing polyamide binder and an antifriction filler. As the polyamide resins is used, prepolymer and Kannapolis graphite, molybdenum disulfide and a binder is carried out both in dry form and in solution of the resin, including N-organic. This filler can be entered in the finished prepolymer, and at the stage of its synthesis. Samples of this composition have a stable coefficient of friction up to 200 250oC. However, above this temperature it won't work.The objective of the invention is to develop a resin composition for anti-friction coatings with stable friction coefficient at 25 - 500oC and high wear resistance up to 400oC.It was found that the introduction of graphite filler in the composition at the stage of synthesis of the binder (prepolymer PANI) simplifies technology for composition and creates conditions for a more uniform composition due to the stability of the suspension and the stability of the composition during storage that simplifies the technology of coating and has a positive effect on anti-friction properties of the coating.This effect is implemented in the following ratio, wt. hMRS. 23
Graphite 1 30
N-Organic 220 1000.The technology of obtaining the composition is as follows: upon receipt of the polymer PA is about acid in the environment N-methylpyrrolidone in the presence of a catalyst (benzoic acid and benzimidazole) in the reaction mass is injected graphite. In response receive a stable homogeneous suspension of graphite in a solution of the prepolymer MRS General formula
< / BR>in N-organic.As a binder was used, the prepolymer, obtained by low-temperature condensation of 3,3', 4,4'-tetraaminodiphenyl and dianhydride 1,4,5,8-naphthalenemethanol acid in the environment N-methylpyrrolidone in the presence of a catalyst.As antifriction filler was used graphite marks C1 OST 6-68-431-75.The technology of obtaining simple: the resulting suspension is applied on a metal surface with a spray gun and thermoablative in vacuum at 250 300oC.The floor felt on the machine end friction at a load of 1 kg/cm2and speed of 0.3 m/s in the air on steel counterbody (steel H).Below are examples of specific formulations of the inventive compositions and friction properties of the obtained materials (coefficient of friction in the range of a temperature of 25 500oC, weight wear at 25 400oC). Cm. table. 1 and 2.The proposed composition is simple in manufacturing, technology for fetching coating method lacquer application.The coating of the inventive high-wear resistance (0,210-80,410-8in the temperature range 25 to 400oC. Polymer composition for anti-friction coating, consisting of a heat-resistant binder amidnogo type, graphite and N-methylpyrrolidone, characterized in that it as a heat-resistant binder amidnogo type contains polyaminoamide in the following ratio, wt.h.Polyaminoacid 23
Graphite 1 30
N-220 organic o
SUBSTANCE: invention relates to industrial rubber and particularly to rubber mixtures for making frost resistant cushion blocks for railway line braces. The rubber mixture consists of the following in pts. wt: natural rubber - 100, zinc oxides - 5-10, crumbs made from corks - 10-15, P-514 technical carbon - 20-25, P-701 technical carbon - 15-25, technical sulphur - 1-2, acetonanil P - 1-2, sulfonamide C - 1.5-2.0, diaphene FP - 1-2, stearin - 1-2.
EFFECT: cushion blocks made from the said mixture have low residual deformation, high frost resistance, high noise and vibration damping capacity.
SUBSTANCE: invention can be used in machine-building to make wear-resistant rod packing and cylinders of hydraulic devices instead of rubber fabric chevron seals, as well as for articles for construction purposes in mining, oil and gas extraction and chemical industry. The rubber mixture based on cis-isoprene rubber SKI-3 - 100 pts.wt contains the following, pts.wt: ultra-high molecular weight polyethylene, modified 7 wt % carbonaceous material carbosil - 170, viscose fibre filler, saturated with latex-resorcinol-formaldehyde composition - banavis - 80, active technical carbon P-234 - 30, petroleum oil - softening agent - netoxol 5, zinc oxide - 5, stearic acid - 1, sulphur - 3, sulfonamide C 1.6, diaphene antiageing agent FP-1, antiozonant-acetonanil N - 1.
EFFECT: articles obtained from the rubber-polymer material have extremely high rigidity, frame structure, resistance to frictional forces, weak acid and alkaline solutions, while partially retaining elasticity, high hardness under intense wear conditions.
SUBSTANCE: prepreg contains the following (wt %): adhesive epoxy composition (30-60) and carbonaceous filler (40-70) treated with epoxy finishing agent based on bundles having not more than 2 twists per metre, linear density of 100-72000 tex and consisting of elementary fibres with strength of 3000-4500 MPa.
EFFECT: prepreg has high tensile, compression and shearing strength and high impact resistance of the article made from said prepreg.
3 cl, 2 tbl, 4 ex
SUBSTANCE: moulding compounds contain a component (A) of 34-99.99 wt % of at least one thermoplastic polymer selected from (i) polyarylene ethers, (ii) polyether imides, (iii) polyarylene sulphides, (iv) polycarbonates with glass-transition temperature of at least 145°C, and copolymers of said polymers (i)-(iv); a component (B) of 0.01-10 wt % of at least one organic black pigment which is transparent in the range from 1000 nm to 1600 nm and has thermal stability according to DIN EN 12877-1 of at least 300°C. The moulding compounds can optionally contain 0-6 wt % of a lubricant (C), 0-50 wt % of one or more additives (D). The sum of all components is equal to 100 wt %.
EFFECT: reducing heat accumulation in structural components made from synthetic materials, moulded articles, films and membranes.
14 cl, 2 tbl, 8 ex
FIELD: technological processes.
SUBSTANCE: invention relates to compositions for copper electroplating on substrate surfaces of electronic devices. Composition contains a source of copper ions and at least one additive of linear or branched polymer compound of imidazolium of formula (L1), where R1, R2, R3 - hydrogen, R4 - bivalent substituted or unsubstituted C2-C20 alkandiyl, n is an integer from 2 to 6,000.
EFFECT: use of the aid additive (L1) in electrolytic baths for copper electroplating provides higher efficiency of copper layer leveling with achievement of essentially planar layer of copper and filling nanometric and micrometric features of surface without formation of defects, such as cavities.
14 cl, 16 dwg, 10 ex
SUBSTANCE: described curable compositions comprise a polybenzoxazine component, a polyamine component, and a fluoropolymer component. The fluoropolymer component used is selected from fluoroolefin (co) polymers, perfluoroolefin (co) polymers, (co) polymers of perfluoroalkylvinylethers and (co) perfor alkoxyvinyl ether polymers.
EFFECT: invention provides protection against corrosion of substrates under the influence of high temperatures.
14 cl, 3 tbl, 3 ex