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Isocyanate modified graphene containing heat-dissipating coating material and preparation method

A heat-dissipating coating and isocyanate technology, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problems of inapplicability of fast-volatile coatings, slow volatilization speed, and poor heat-dissipating effect of coatings. The effect of conduction, excellent thermal conductivity, high infrared emissivity

Active Publication Date: 2019-01-25
四川恒力盛泰石墨烯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current method of dispersing graphene in the laboratory is generally by using a solvent with good graphene dispersion, such as N-methylpyrrolidone (NMP), N, N-dimethylformamide (DMF), but the The volatilization speed is extremely slow, and the scope of application is small. It is not suitable for coatings that require fast volatilization of solvents
[0013] (2) If the graphene is dispersed on the polymer matrix by the original polymerization method, or the graphene is modified, etc., because the graphene surface active group is less, it can be combined with the polymer or the treatment agent. Fewer opportunities to form chemical bonds, thus facing limited processing effect
As for the heat-dissipating coatings that have been made into finished products, once they are reunited, there are no effective and feasible measures for the end users to disperse them again, which will lead to the deterioration of the heat-dissipating effect of the coatings and fail to meet the design and construction standards.

Method used

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  • Isocyanate modified graphene containing heat-dissipating coating material and preparation method
  • Isocyanate modified graphene containing heat-dissipating coating material and preparation method
  • Isocyanate modified graphene containing heat-dissipating coating material and preparation method

Examples

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preparation example Construction

[0057] figure 1 It is the preparation method of the heat dissipation coating containing isocyanate modified graphene provided by the embodiment of the present invention, comprising:

[0058] S101: Preparation of the main ingredient: Add solvent, additives, and film-forming substances into the mixing bucket, and stir at 50-1200RPM for 10-30 minutes until the mixture is uniform; while stirring at 50-600RPM, slowly add the thermally conductive filler into the mixing bucket , after the addition is complete, stir at a speed of 50-1200 RPM for 10-30 minutes until the mixture is evenly mixed to obtain the main ingredient.

[0059] S102: Preparation of a curing agent: the curing agent is an isocyanate trimer modified low-temperature oxygen plasma activated graphene solution, the graphene powder is put into a quartz tube, and then vacuumed to below 5Pa. After the air pressure is stabilized, pass Inject a certain amount of oxygen, after the gas flow is stable and the air pressure is 3...

Embodiment 1

[0073] The main agent of the heat-dissipating coating containing isocyanate-modified graphene provided by the embodiments of the present invention is composed of:

[0074]

[0075] Deploy as follows:

[0076] Step 1: Add the solvent, additives, and film-forming substances into the mixing tank, and stir at 600 RPM for 20 minutes until the mixture is uniform.

[0077] Step 2: While stirring at 300 RPM, slowly add boron nitride nanotubes and aluminum oxide into the mixing tank. After the addition, stir at 900 RPM for 30 minutes until uniformly mixed to obtain the main ingredient.

[0078] The curing agent of the heat-dissipating coating containing isocyanate-modified graphene provided by the embodiments of the present invention is composed of:

[0079] 1 part of monolayer graphene;

[0080] 40 parts of hexamethylene diisocyanate trimer;

[0081] 59 parts of butyl acetate;

[0082] Deploy as follows:

[0083] Step 1, put the single-layer graphene powder into the quartz tub...

Embodiment 2

[0088] The main agent of the heat-dissipating coating containing isocyanate-modified graphene provided by the embodiments of the present invention is composed of:

[0089]

[0090] The deployment method is the same as in Example 1.

[0091] The curing agent of the heat-dissipating coating containing isocyanate-modified graphene provided by the embodiments of the present invention is composed of:

[0092] 1 part of monolayer graphene;

[0093] Toluene diisocyanate trimer 40 parts

[0094] Butyl acetate 59 parts composition.

[0095] The deployment method is the same as in Example 1.

[0096] Calculate the blending ratio of the main agent and the curing agent, and prepare according to the molar ratio of hydroxyl group and isocyanate group as 1:1.1, and spray to control the dry film thickness of the coating within 10-20 microns, and the spraying is completed within 4 hours.

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Abstract

The invention belongs to the technical field of heat dissipating materials and discloses an isocyanate modified graphene containing heat-dissipating coating material and a preparation method. The heat-dissipating coating material is prepared from a main agent and a curing agent, wherein the mole ratio of hydroxyl radicals of the main agent to isocyanate radicals of the curing agent is 1: (1 to 1.1); the main agent is prepared from a film forming matter, a solvent, adjuvants and heat conducting fillers according to a mass ratio; the curing agent is an isocyanate trimer modified low-temperatureoxygen plasma activated graphene solution. The invention simultaneously discloses the preparation method. The heat-dissipating coating material disclosed by the invention has excellent heat-conductingproperty and high infrared radiance, and heat can be rapidly conducted to a whole coating and is dissipated in an infrared radiating manner; graphene is activated by plasma, the hydroxyl radicals areintroduced to the surface of the graphene under the condition of not carrying in a large number of defects, and can be subjected to a cross-linking reaction with isocyanate, and after isocyanate is grafted, the graphene still reserve original heat-conducting property.

Description

technical field [0001] The invention belongs to the technical field of heat dissipation materials, and in particular relates to a heat dissipation coating containing isocyanate-modified graphene and a preparation method thereof. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] Coating refers to a liquid or solid material that is coated on the surface of an object to form a continuous film that protects, decorates, or performs other special functions on the object. [0004] With the rapid development of current technology, various electronic and electrical products, especially 3C digital products, are developing in the direction of miniaturization, light weight, and high efficiency. With the reduction of their volume and weight, their internal space It is also more compact, leaving less space for heat dissipation devices. At present, the common heat dissipation schemes include air cooling, liquid coo...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D5/08C08G18/80
CPCC08G18/80C09D5/08C09D175/04
Inventor 张静谌辰博陈永标
Owner 四川恒力盛泰石墨烯科技有限公司
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