Heat-conducting paint and preparation thereof and aluminum-based composite material using heat-conducting paint for coating

A technology of aluminum-based composite materials and thermally conductive coatings, which is applied in the direction of epoxy resin coatings, polyurea/polyurethane coatings, and devices for coating liquids on the surface. Breakdown and other problems, to achieve the effect of outstanding thermal conductivity, strong thermal conductivity, excellent high pressure resistance

Active Publication Date: 2017-07-14
江门市德佑金属材料实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, this aluminum-based composite material has the following problems: First, the flexibility of the coating film is poor, and cracks appear on the surface of the capacitor during stamping
Second, the resistivity of the material is low, and the high-voltage resistance performance is not up to standard, which makes the capacitor easy to be broken down
Third, the thermal conductivity of the material is low, and the thermal conductivity is not up to standard, resulting in a low service life of the capacitor

Method used

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  • Heat-conducting paint and preparation thereof and aluminum-based composite material using heat-conducting paint for coating

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Effect test

Embodiment 1

[0034] Prepare high-voltage resistant thermally conductive coatings (marked as A1) and aluminum-based composites (marked as B1) suitable for aluminum substrates in the following manner.

[0035] (1) The preparation method of aluminum-based coating A1 is as follows:

[0036] (a) Add 14.5 parts of n-butyl acetate and 20 parts of dimethyl glutarate into the reaction kettle, and add 40 parts of polyurethane resin sequentially under the conditions of heating (60-70°C) and stirring (600 rpm) Estane ® 5703 TPU and 5 parts of epoxy resin D.E.R.331, then heat and stir for 3 hours; when the resin is completely dissolved until clear and transparent, cool the mixed resin solution to room temperature;

[0037] (b) While stirring at room temperature, sequentially add 10 parts of curing agent CYMEL ® 303. Catalyst 0.5 part NACURE ® 2107 and 10 parts of AlN as a thermally conductive filler, stirred at a high speed at room temperature, and mixed uniformly to obtain aluminum-based coating...

Embodiment 2

[0043] The high-voltage resistant thermally conductive coating (marked as A2) and the aluminum-based composite (marked as B2) suitable for aluminum matrix were prepared in the following manner.

[0044] (1) The preparation method of aluminum-based coating A2 is as follows:

[0045] (a) Add 20 parts of dimethyl succinate and 19.8 parts of dimethyl glutarate to the reactor, and add 30 parts of polyurethane resin in sequence under heating (60-70°C) and stirring (600 rpm) Estane ® 5715 TPU and 10 parts of epoxy resin D.E.R.352, then heat and stir for 3 hours; when the resin is completely dissolved until clear and transparent, cool the mixed resin solution to room temperature;

[0046] (b) While stirring at room temperature, sequentially add 5 parts of curing agent CYMEL ® 325. Catalyst 0.2 parts NACURE ® 3525 and thermally conductive filler 8 parts AlN and 7 parts Al 2 o 3, stirring at a high speed at room temperature, and mixing uniformly to obtain aluminum-based coating ...

Embodiment 3

[0052] Prepare high-voltage resistant thermally conductive coatings (marked as A3) and aluminum-based composites (marked as B3) suitable for aluminum substrates in the following manner.

[0053] (1) The preparation method of aluminum-based coating A3 is as follows:

[0054] (a) Add 34.7 parts of propylene glycol methyl ether acetate to the reaction kettle, and add 38 parts of polyurethane resin in sequence under heating (60-70°C) and stirring (600 rpm) Estane ® 5719 TPU and 7 parts of epoxy resin D.E.R.354, reheat and stir for 3 hours; when the resin is completely dissolved until clear and transparent, cool the mixed resin solution to room temperature;

[0055] (b) While stirring at room temperature, sequentially add 8 parts of curing agent Resimene ® R-747, catalyst 0.3 parts NACURE ® 5225 and thermally conductive filler 8 parts AlN and 4 parts Al 2 o 3 , stirred at high speed at room temperature, and mixed uniformly to obtain aluminum-based coating A3.

[0056] (2) T...

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Abstract

The invention discloses a heat-conducting paint and preparation thereof and an aluminum-based composite material using the heat-conducting paint for coating. The heat-conducting paint comprises the following ingredients (by weight): 30-40 parts of polyurethane resin, 5-10 parts of epoxy resin, 5-10 parts of a curing agent, 0.2-0.5 part of a catalyst, 10-15 parts of a heat-conducting filler and 30-40 parts of an organic solvent. The preparation method comprises the following steps: adding polyurethane resin and epoxy resin into the organic solvent at 60-70 DEG C and stirring until the solution is clear and transparent, cooling to room temperature; and successively adding the curing agent, the catalyst and the heat-conducting filler, and continuously stirring until the materials are uniformly mixed. The aluminum-based composite material is produced by the following steps: uniformly coating an aluminum coil material with the heat-conducting paint; baking-curing at 250-270 DEG C for 2-3 min; and finally naturally cooling to 20-30 DEG C. The aluminum-based composite material produced by the above paint has good flexibility, high resistivity and high heat conductivity coefficient.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a heat-conducting paint, its preparation and an aluminum-based composite material coated with the same. Background technique [0002] Composite materials are indispensable materials in electronic and electrical products. Components in various electronic and electrical fields, such as capacitors, batteries, circuit boards, etc., must use composite materials to ensure that components can work normally and safely . [0003] At present, the commonly used production process of capacitors is: coating a certain thickness of coating on the rolled aluminum substrate, after high temperature baking, to obtain aluminum matrix composite materials, and then stamping and packaging. First of all, this aluminum-based composite material has high requirements for the flexibility of the coating film when it is stamped and formed. Secondly, the coating film must have high insulation. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D163/00C09D7/12B05D7/14
CPCB05D7/14C09D175/04C08L63/00C08K2003/282C08K2003/2227
Inventor 张德铭王顺有冯志德刘道义
Owner 江门市德佑金属材料实业有限公司
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