Functional composite resin coating

Abstract

The invention discloses a functional composite resin coating, and relates to the technical field of resin materials, the functional composite resin coating comprises, by mass, 40-80% of a resin matrix, 0.1-10% of an auxiliary agent, and 1-20% of a covalent nitride filler. According to the functional composite resin coating provided by the invention, the covalent nitride is selected as the high-thermal-conductivity filler, so that the coating has high thermal conductivity and also has the effects of insulation and relatively low weight.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of resin materials, and particularly relates to a functional composite resin coating. BACKGROUND

[0002] In order to solve the heat dissipation requirement of high power density equipment, a coating type heat dissipation technology needs to be used. The technology generally uses resin paint, and the resin paint becomes an ideal base material of the heat dissipation coating because of good film forming property, weather resistance, insulation and excellent adhesion to various substrates (such as metal, plastic and ceramic). However, the thermal conductivity of pure resin material is extremely low, and cannot meet the requirement of efficient heat dissipation. Therefore, the pure resin material must be modified by adding high thermal conductivity fillers to improve the overall heat conduction performance of the coating. In the prior art, the high thermal conductivity fillers are mostly metal powder. Although the metal powder has high thermal conductivity, the metal powder has problems of easy oxidation, strong electrical conductivity leading to short circuit risk of equipment and large density. SUMMARY

[0003] In order to solve the technical problems that the high thermal conductivity fillers used in the heat dissipation functional resin coating in the prior art cause strong electrical conductivity of the coating and large weight, the present application provides a functional composite resin coating. The functional composite resin coating uses covalent nitride as the high thermal conductivity filler, and can meet the requirement of high thermal conductivity of the coating, and also has the effects of insulation and low weight.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows. The functional composite resin coating provided by the present application contains 40-80% resin base, 0.1-10% additive and 1-20% covalent nitride filler in terms of mass percentage.

[0005] Preferably, the resin base is at least one of acrylic resin, epoxy resin, polyurethane, polycarbonate and silicone resin, or a modified material of any of the above-mentioned resins.

[0006] Preferably, the additive contains leveling agent and wetting agent, and the mass ratio of the leveling agent to the wetting agent is 1:1.

[0007] Preferably, the leveling agent is polyether modified polysiloxane or acrylate copolymer.

[0008] Preferably, the covalent nitride filler is AlN (aluminum nitride).

[0009] Preferably, the covalent nitride filler is BN (boron nitride).

[0010] The functional composite resin coating provided by the application preferably further comprises 20-50% solvent; the solvent is water.

[0011] The functional composite resin coating provided by the application preferably further comprises 1-10% graphene; the graphene is single-layer or few-layer graphene, the flake diameter of the graphene is 0.5-5 mu m, and the thickness is less than or equal to 5 nm.

[0012] The functional composite resin coating provided by the application preferably further comprises 1-5% polytetrafluoroethylene.

[0013] The functional composite resin coating provided by the application relates to the technical field of resin materials, and comprises 40-80% resin matrix, 0.1-10% additive and 1-20% covalent nitride filler according to mass percentage. DETAILED DESCRIPTION

[0014] The exemplary embodiments will be described in detail hereinafter. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0015] Embodiment 1: The functional composite resin coating provided by the application comprises 40-80% resin matrix, 0.1-10% additive and 1-20% covalent nitride filler according to mass percentage. The functional composite resin coating provided by the application needs to be prepared, and then sprayed on the attachment to form a coating with auxiliary heat dissipation. When the resin material is prepared, the resin matrix is mixed and stirred according to the set proportion to achieve a uniformly dispersed state; then the additive is added, and the stirring is continued to ensure that the additive is fully mixed with the resin matrix; finally, the covalent nitride filler is added, and the functional composite resin is obtained after uniform stirring. The functional composite resin prepared by the above method has good flowability at room temperature, which is convenient for subsequent coating processing; at the same time, the components of the resin are uniformly mixed without obvious particle agglomeration, which is beneficial to improve the uniformity of the subsequent coating. The covalent nitride filler has the characteristics of high melting point and good chemical stability, and is an insulator or a semiconductor; it can effectively meet the functions of high thermal conductivity, low density and insulation required by the resin coating.

[0016] The functional composite resin coating provided by the application can effectively improve the heat conduction efficiency of the functional composite resin and can effectively exchange heat for the attachment body by adding covalent nitride fillers in the resin matrix.

[0017] In one preferred embodiment of the present application, the resin matrix is at least one of acrylic resin, epoxy resin, polyurethane, polycarbonate and silicone resin, or a modified material of any of the above resins. The use of modified resin matrix, such as acrylic resin grafted with epoxy resin, can significantly improve the heat resistance, with a heat distortion temperature of 120 DEG C, and can also improve the adhesion of the coating, solving the technical problem that a single resin matrix is difficult to adhere to the surface of the attachment body.

[0018] In one preferred embodiment of the present application, the auxiliary agent includes a leveling agent and a wetting agent, and the mass ratio of the leveling agent to the wetting agent is 1:1. The leveling agent and the wetting agent mixed at a ratio of 1:1 have a smooth and flat coating surface after coating, and due to the leveling effect, the coating can uniformly cover the surface of the attachment body without missing coating.

[0019] In one preferred embodiment of the present application, the leveling agent is polyether modified polysiloxane or acrylic ester copolymer.

[0020] In one preferred embodiment of the present application, the covalent nitride filler is AlN (aluminum nitride).

[0021] In one preferred embodiment of the present application, the covalent nitride filler is a heat dissipation filler BN (boron nitride).

[0022] In one preferred embodiment of the present application, 20-50% solvent is further included, and the solvent is water. The addition of water in the functional composite resin can reduce the viscosity and improve the flowability, facilitating the spraying.

[0023] In one preferred embodiment of the present application, 1-10% graphene is further included, and the graphene is single-layer or few-layer graphene, the flake diameter of the graphene is 0.5-5 mu m, and the thickness is less than or equal to 5 nm. The addition of graphene can further improve the thermal conductivity of the functional composite resin, and greatly improve the heat dissipation efficiency of the coating for the attachment body.

[0024] In one preferred embodiment of the present application, 1-5% polytetrafluoroethylene is further included. After the addition of polytetrafluoroethylene in the functional composite resin, high-temperature curing is required during spraying, specifically curing at 120 DEG C for 2 hours. The polytetrafluoroethylene can improve the hardness and corrosion resistance of the coating, and can effectively improve the service life of the coating.

[0025] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

[0026] It should be understood that the application is not limited to the precise construction here described and as such changes and modifications can be effected therein by those skilled in the art without departing from the scope of the application. The scope of the application should be limited only by the appended claims.

Claims

1. A functional composite resin coating, characterized by, The resin matrix comprises 40-80% by mass, the auxiliary agent comprises 0.1-10% by mass, and the covalent nitride filler comprises 1-20% by mass.

2. The functional complex resin according to claim 1, characterized by, The resin matrix is at least one of an acrylic resin, an epoxy resin, a polyurethane, a polycarbonate, and a silicone resin, or a modified material of any of the above resins.

3. The functional complex resin according to claim 1, characterized by, The auxiliary agent comprises a leveling agent and a wetting agent, and the mass ratio of the leveling agent to the wetting agent is 1:

1.

4. The functional complex resin according to claim 3, characterized by The leveling agent is a polyether-modified polysiloxane or an acrylate copolymer.

5. The functional complex resin according to claim 1, wherein The covalent nitride filler is AlN (aluminum nitride).

6. The functional complex resin according to claim 1, wherein The covalent nitride filler is BN (boron nitride).

7. The functional complex resin according to claim 1, wherein The solvent is water.

8. The functional complex resin according to claim 1, characterized by, The graphene is single-layer or few-layer graphene, the flake diameter of the graphene is 0.5-5 μm, and the thickness of the graphene is ≤5 nm.

9. The functional complex resin according to claim 1, characterized by, The polytetrafluoroethylene comprises 1-5% by mass.