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Liquid coating and preparation method thereof

A liquid coating and solution technology, applied in the coating field, can solve the problems of poor oil pressure resistance and lubricating oil medium properties, high temperature resistance, poor wear resistance and self-lubricating comprehensive performance, easy to fall off, etc., and achieves good electrical and thermal conductivity. Good wear reduction and self-lubricating properties, strong resistance to rapid cooling and rapid heating

Active Publication Date: 2013-03-06
ANQING CSSC DIESEL ENGINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coating reported in this patent application has poor wear resistance, the piston may fall off when working at high temperature, and the coating thickness of the coating is difficult to control
The Chinese patent No. ZL981268.4 reports a kind of anti-sticking wear-resisting coating, and this coating load-carrying capacity is low, and resistance to oil pressure and lubricating oil medium is poor, and temperature resistance is poor, and its coating can not be widely used in high-load, high-speed, Severe working conditions such as high temperature, hydraulic pressure and lubricating oil medium, and the thickness of the coating is difficult to control and easy to fall off
[0004] In the prior art, Chinese patent application No. 01130430.8 reports a molybdenum disulfide-based temperature-resistant lubricating coating, which uses novolak epoxy resin and organosiloxane resin as an adhesive, and eye-fixing rubber as a toughening agent. Molybdenum disulfide is used as a lubricant, rare earth compounds are used as inhibitors, and metal oxides are used as high-temperature-resistant fillers. However, this lubricating coating is only suitable for aero-engine air pipe components, not for pistons and other components. High-temperature-resistant, wear-resistant and self-lubricating Poor overall performance

Method used

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  • Liquid coating and preparation method thereof
  • Liquid coating and preparation method thereof

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Experimental program
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preparation example Construction

[0044] The present invention also provides a preparation method of liquid paint, comprising:

[0045] Mixing cyclohexanone and ethyl cellulose to obtain a first solution;

[0046] The first solution is mixed with epoxy resin, molybdenum disulfide, graphite and phenolic resin to obtain a liquid paint.

[0047] The mixing of cyclohexanone and ethyl cellulose can be achieved by stirring, and there is no special limitation on the stirring time, it is only necessary to completely dissolve the ethyl cellulose in the cyclohexanone solution to obtain the first solution.

[0048] After obtaining the first solution, mixing the first solution with epoxy resin, molybdenum disulfide, graphite, and phenolic resin can be achieved by stirring, and there is no special limitation on the stirring time, preferably 2 to 5 hours, more preferably 3 to 4 hours.

[0049]In the above technical scheme, the mass ratio of the cyclohexanone, ethyl cellulose, epoxy resin, molybdenum disulfide, graphite an...

Embodiment 1

[0058] At 65°C, add 50kg of cyclohexanone into the stirred tank; slowly add 3kg of ethyl cellulose under stirring to make the ethyl cellulose completely wet; stir for more than 3 hours until the ethyl cellulose is completely dissolved in the In the cyclohexanone solution; in the stirring state, add 15kgE44 epoxy resin, 11kg molybdenum disulfide, 8kg graphite, 16kg bisphenol A type resole phenolic resin in turn; check the addition of materials, and then stir for more than 3 hours; after stirring evenly , unloading packaging. The performance test result of the liquid coating that present embodiment provides is as follows:

[0059] The performance test result of the liquid coating that table 1 embodiment 1 provides

[0060]

[0061]

Embodiment 2

[0063] PSHTd-26H cast iron pistons are provided, and the pistons are treated according to degreasing, chrome plating, cleaning, dehydrogenation and phosphating procedures well known to those skilled in the art, and the liquid coating provided in Example 1 is coated on the surface of the treated pistons;

[0064] Oil immersion treatment of pistons coated with liquid paint.

[0065] The thickness of the coating on the surface of the piston measured by the thickness gauge is 18 μm.

[0066] The surface of the above-mentioned piston is inspected by wiping method, specifically: after wiping the surface of the test piston with 500±5 grams of pine wood back and forth for 30 times, the total film thickness is measured to be 15 μm. After rubbing the test surface of the piston with 500±5 grams of Q235A steel block back and forth for 30 times, the total film thickness was measured to be 11 μm. The test result of wiping method shows that the liquid coating prepared in this embodiment has...

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Abstract

The embodiment of the invention discloses a liquid coating and a preparation method thereof, wherein the liquid coating comprises the following ingredients: 40 wt% - 60 wt% of cyclohexanone, 2 wt% - 10 wt% of ethyl cellulose, 10 wt% - 30 wt% of epoxy resin, 5 wt% - 20 wt% of phenolic resin, 5 wt% - 15 wt% of molybdenium disulfide, and 1 wt% - 10 wt% of graphite. The experimental result shows that the liquid coating of the invention has the functions of thermostability, wear resistance and self lubrication, and has excellent comprehensive performance and low cost, and is applicable to the components, such as a piston.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a liquid coating and a preparation method thereof. Background technique [0002] In industries such as machinery, petroleum exploration, shipbuilding equipment manufacturing, and transportation, when the high-load piston in the equipment performs high-speed reciprocating motion in the cylinder liner, due to the joint action of special working conditions such as high load, high speed, and instantaneous dry friction, the surface of the component The temperature rise is high, and the parts that move with each other are prone to sintering and straining, especially in the reciprocating motion between the new cylinder block and the new piston, when the piston runs at the upper and lower dead centers, the piston and the cylinder liner are actually in a state of boundary lubrication , It is easy to cause strain on the surface of the cylinder and piston, resulting in the scrapping of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D161/06C09D101/28C09D7/12
Inventor 沈敦华徐伟平
Owner ANQING CSSC DIESEL ENGINE
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