Sealer, members covered with sprayed coatings, and bearings

A technology for coating components and treating agents, which is applied in the directions of fusion spraying, metal material coating process, coating, etc., can solve the problems of difficulty in maintaining environmental occlusion, poor adhesion of substrates, complicated devices, etc., and achieves permeability. Excellent, improved adhesion, effect of improving adhesion

Active Publication Date: 2009-04-29
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that these methods are not suitable for industrial production because they require special devices or complicated procedures except for the pressurization or decompression process.
In addition, from the viewpoint of the amount of dissolved oxygen, there is also a problem that in order to improve storage stability, it is always required to observe detailed precautions.
[0009] In addition, polymers obtained by polymerizing polymerizable organic solvents such as "styrene monomer" have problems such as gaps in the cured product or poor adhesion to the substrate.
[0010] As described above, in the prior art, in order to stably maintain the environmental barrier properties of the film, it is necessary to constitute a very complicated process in the operation of impregnating the sealing treatment agent to the surface of the substrate.
Even if the sealing treatment agent is successfully penetrated into the surface of the base material, there is a concern due to the addition of a polymerizable solvent to the epoxy resin
In addition, there is a concern that it will be difficult to maintain the long-term environmental barrier properties of the sealed member due to the re-creation of minute gaps due to the curing shrinkage of the sealing agent itself over time.

Method used

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  • Sealer, members covered with sprayed coatings, and bearings
  • Sealer, members covered with sprayed coatings, and bearings
  • Sealer, members covered with sprayed coatings, and bearings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～ Embodiment 5 and comparative example 1～ comparative example 7

[0112] Materials used in Table 1 are shown below.

[0113] (1) Glycidyl ether compound or cycloaliphatic diepoxy compound

[0114] (1-1) Trimethylolpropane triglycidyl ether: manufactured by Nagase Chemtex Co., Ltd., Denakol EX-321L, viscosity: 500 mPa·s (25° C.)

[0115] (1-2) Phenylene diglycidyl ether: manufactured by Nagase Chemtex Co., Ltd., denacol EX-201L, viscosity: 240 mPa·s (25° C.)

[0116] (1-3) Alkylene diglycidyl ether: Japan Epikisilesin Co., Ltd. product, YED216M, viscosity: 15 mPa·s (25° C.)

[0117] (1-4) Alkylene monoglycidyl ether: Japan Epikisilesin Co., Ltd. product, YED111E, viscosity: 7 mPa·s (25° C.)

[0118] (1-5) Cyclic aliphatic diepoxy compound: manufactured by Daicel Chemical Industry Co., Ltd., Celocide 3000, viscosity: 10 mPa·s (25° C.)

[0119] (2) epoxy resin

[0120] (2-1) Bisphenol F-type epoxy resin: made by Japan Epikisilesin Co., Ltd., Epico-ro 806, viscosity: 2000 mPa·s (25° C.)

[0121] (3) curing agent, curing accelerator

[0122...

Embodiment 6～ Embodiment 8 and comparative example 8～ comparative example 10

[0150] The components shown in Table 2 were fully stirred and mixed at room temperature, and left to stand for 30 minutes in order to eliminate air bubbles in the mixture to obtain a sealing treatment agent. In addition, the material used in Table 2 corresponds to the material used in Table 1 mentioned above. The specific gravity before and after curing was measured for the obtained sealing agent, and the sealing agent was evaluated by the density ratio before and after curing of the sealing agent. The results are listed in Table 2 together.

[0151]

[0152] Before calculation, the density of the uncured sealing agent is measured according to the measurement method in the specific gravity cup method described in JIS K6833 "Test method for solvent-free liquid resin for electrical insulation", and the obtained specific gravity is taken as the density before curing (unit: g / cm 3 ). On the other hand, about 20 g is weighed in a clean PP container (capacity 30 ml) free of fo...

Embodiment 9～ Embodiment 12 and comparative example 11～ comparative example 13

[0173] The components shown in Table 3 were sufficiently stirred and mixed at room temperature, and left to stand for 30 minutes in order to eliminate air bubbles in the mixture to obtain a sealing treatment agent. Note that the materials used in Table 3 correspond to the materials used in Table 1 above.

[0174]

[0175] Next, a test piece made of SUJ2 of ф20 mm×25 mm was prepared, and an alumina ceramic sprayed film with a film thickness of 400 μm was formed on the cylindrical end surface by the atmospheric plasma spraying method.

[0176] The sealing agent shown in Table 3 was applied to the surface of the thermal sprayed surface under a room temperature atmosphere using a polyamide brush, and left to stand for 30 minutes. Thereafter, the sealing treatment agent-coated test piece was produced in a state in which the excess sealing treatment agent of the surface-adhered components was scraped off with a polyethylene spatula. Thereafter, these coated test pieces were pre-s...

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Abstract

The present invention provides a pore-sealing agent and a member of coating a spray deposit. The pore-sealing agent is excellent in permeability into pores (gaps) of a spray deposit and can be favorably filled thereinto and is capable of sealing pores until a state in which gaps in a spray deposit material are substantially entirely filled is obtained. The pore-sealing agent contains an epoxy group-containing component and a hardener and does not contain a polymerizable vinyl group-containing solvent. The epoxy group-containing component is a mixture containing a polyglycidyl ether compound in which the number of epoxy groups contained in one molecule is not less than three as an essential component thereof and in addition, an alkylenediglycidyl ether compound or a cyclic aliphatic diepoxy compound, both of which contain two epoxy groups in one molecule thereof. Excluding the hardener, the mixing ratio of the polyglycidyl ether compound to the epoxy group-containing component of the mixture is 10 to 95 wt%.

Description

technical field [0001] The present invention relates to a sealing treatment agent, a spray coating coating member, and a bearing, and more particularly, to an epoxy resin-based sealing treatment agent, and a spray coating coating member and bearing obtained by using the treatment agent. . Background technique [0002] The technology of improving heat resistance, wear resistance, and corrosion resistance by spraying hard particles and powders such as metal or ceramics on the surface of the base material of mechanical parts made of steel or the like has been implemented. Generally, a sprayed coating has pores such as voids, gaps, and voids generated during the formation of the coating, and the pores impart various characteristics to the coating itself. Among the pores, some pores show the form of communicating pores from the surface of the substrate to the texture of the substrate, connecting the environment of the surface layer of the coating and the substrate coated with th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C26/00C23C4/18
Inventor 村上和丰
Owner NTN CORP
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