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Undercoat resistant to flushing of high pressure liquid

A technology of high pressure resistance and primer, applied in the direction of coating, epoxy resin coating, polyamide coating, etc., to achieve the effect of prolonging service life and good bonding force

Active Publication Date: 2012-07-11
SINO TRUK JINAN POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many domestic engine primer products, but they cannot meet the flushing requirements of 500 bar pressure during machining

Method used

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  • Undercoat resistant to flushing of high pressure liquid
  • Undercoat resistant to flushing of high pressure liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Primers resistant to high pressure liquid washdown are prepared as follows:

[0032] (1) Miscibility of resin

[0033] Put 28 parts of xylene, 9 parts of butanol, and 9 parts of co-solvent into the bottom of the reactor, stir for 10 minutes, add 33 parts of E-20 epoxy resin, 15 parts of E-12 epoxy resin, and control the temperature at 60 Stir at -65°C for 1 hour until it becomes a homogeneous liquid.

[0034] (2) Preparation of component A

[0035] Put 40 parts of the liquid prepared in (1) into the bottom of the reaction kettle, add 0.3 parts of auxiliary agent A, which is a wetting and dispersing agent, stir for 10 minutes, and after uniformity, add 30 parts of anti-rust pigments, 9 Part filler, 4.5 parts titanium dioxide, after stirring for 2 hours, perform mechanical grinding until the fineness is 40um, add 1.6 parts of auxiliary agent B, 4.8 parts of cyclohexanone, auxiliary agent B is leveling agent, coupling agent, and stir evenly .

[0036] (3) Preparation o...

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Abstract

The invention relates to the technical field of undercoats and discloses an undercoat resistant to flushing of high pressure liquid. The undercoat consists of a component A and a component B, wherein the component A contains a film forming resin; the film forming resin is formed by an E-20 epoxy resin and an E-12 epoxy resin in a weight ratio of (1.5-4) : 1; the molecular weight of the E-20 epoxy resin is 800-1500, and the molecular weight of the E-12 epoxy resin is 1500-2000; the component B contains polyamide with an amine value of 400+ / -20KOHmg equivalent weight / gram and a molecular weight of 500-1000; and the weight ratio of the film forming resin in the component A to a polyamide curing agent in the component B is (2.20-2.60) : 1. When engine casting blank work pieces coated with the undercoats are flushed under a pressure of 500MPa in the machining process, good bonding force between an undercoat layer and a base body can be realized, and an undercoat coating cannot be destroyed, thereby realizing long-term corrosion prevention of an engine after assembly and prolonging the service life of the engine.

Description

technical field [0001] The invention relates to the technical field of primer coatings, in particular to a primer resistant to high-pressure liquid washing. Background technique [0002] During the manufacturing process of the engine, some manufacturers use water-based anti-rust agent to realize anti-rust between parts and blanks, and spray paint as a whole after assembly. However, for an engine that cannot be painted as a whole after assembly, it is necessary to use a blank to spray a primer first, and then to process and assemble it. [0003] In order to meet the cleanliness requirements of the oil passage, the blanks of the engine cylinder head and crankcase (cylinder block) are in the last process of machining, and the holes of the oil passage should be flushed with a pressure of 500 bar to remove the dirt attached to the hole wall. Metal burrs, when flushing, will wash to the outer surface of the workpiece, while the ordinary primer layer can only withstand the press...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D177/00C09D7/12
Inventor 李玉宁邢思伟赵明强施茜于安军董伦
Owner SINO TRUK JINAN POWER
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