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Rinsing-resistant primer

A technology of primer and film-forming resin, applied in the direction of coating, epoxy resin coating, etc., to achieve the effect of prolonging service life and good bonding force

Inactive Publication Date: 2015-04-29
房佳
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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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (2) Preparation of component A

[0026] 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 .

[0027] (3) Preparation of component B

[0028] Put 27.5 parts of polyamide, 27 parts of xylene, and 26 parts of butanol into the bottom of the reactor, and stir for 10 minutes until uniform.

[0029] Mix component A and component B according to the specified ratio, adjust the viscosity with diluent to 18s, spray with ordinary air spray gun or electrostatic spray gun, spraying pressure 400-550 kPa, wet to wet interval 3 minutes, drying ...

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PUM

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Abstract

The invention relates to the technical field of primer coatings and discloses a rinsing-resistant primer. The rinsing-resistant primer comprises a component A and a component B, wherein the component A comprises film-forming resin which comprising E-44 epoxy resin and E-51 epoxy resin according to a weight ratio of 3: 2; the component B comprises polyamide of which the amine value is 400 + / - 20 KOHmg equivalent / g and the molecular weight is 500-1000; and the weight ratio of film-forming resin in the component A to polyamide in the component B is 2: 1. When a cast engine blank workpiece coated with the primer is rinsed at 500 bar pressure in a machining process, good bonding force between the primer layer and a substrate can be achieved, the primer layer is not destroyed and thus the long-term corrosion prevention of the assembled engine is achieved and the service life of the engine is prolonged.

Description

[0001] technical field [0002] The invention relates to the technical field of primer coatings, in particular to a wash-resistant primer. Background technique [0003] 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. [0004] 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 pressure of 7-30 bar, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D7/12
CPCC09D163/00C08L2205/025C08L2205/03C09D7/65
Inventor 房佳
Owner 房佳
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