阅读说明：本技术 一种发热浆料及其制备方法 (Heating slurry and preparation method thereof ) 是由 周昭寅 周志宏 杨永添 周昭宇 王伟 何青青 于 2020-05-28 设计创作，主要内容包括：本发明公开了一种发热浆料及其制备方法,本发明的发热浆料包括以下质量百分比的制备原料：石墨15-20％；石墨烯1-5％；立方体磷酸锆0.5-1.25％；纳米托玛琳粉0.5-1.25％；蜡粉0-0.5％；有机载体55-65％；固化剂0.5-1％；助剂0.1-1％；有机溶剂A 10-15％。本发明的发热浆料,制备方法简单,操作方便,配方合理,以高性能的石墨为原料,适当添加石墨烯,内阻大,粒度分布均匀,易于涂覆浆料印刷形成面向,具有优良的面内散热,整体发热效果很好。(The invention discloses heating slurry and a preparation method thereof, and the heating slurry comprises the following preparation raw materials in percentage by mass: 15-20% of graphite; 1-5% of graphene; cubic zirconium phosphate 0.5-1.25%; 0.5 to 1.25 percent of nano tourmaline powder; 0 to 0.5 percent of wax powder; 55-65% of organic carrier; 0.5 to 1 percent of curing agent; 0.1 to 1 percent of auxiliary agent; 10-15% of organic solvent A. The heating slurry disclosed by the invention is simple in preparation method, convenient to operate and reasonable in formula, takes high-performance graphite as a raw material, is added with graphene properly, is high in internal resistance and uniform in particle size distribution, is easy to coat the slurry and print, has excellent in-plane heat dissipation and has a good overall heating effect.)

1. The heating slurry is characterized by comprising the following preparation raw materials in percentage by mass:

15-20% of graphite;

1-5% of graphene;

cubic zirconium phosphate 0.5-1.25%;

0.5 to 1.25 percent of nano tourmaline powder;

0 to 0.5 percent of wax powder;

55-65% of organic carrier;

0.5 to 1 percent of curing agent;

0.1 to 1 percent of auxiliary agent;

10-15% of organic solvent A.

2. The heat-generating paste according to claim 1, wherein the organic vehicle includes an organic vehicle a and an organic vehicle B;

the preparation method of the organic carrier A comprises the following steps: mixing straight-chain polyester resin with a benzene ring structure, polyvinyl chloride and an organic solvent B to completely dissolve the polyester resin to obtain an organic carrier A;

the preparation method of the organic carrier B comprises the following steps: and mixing the epoxy resin with the hydroxyl-containing aliphatic reactive diluent to obtain an organic carrier B.

3. The heat-generating paste as claimed in claim 2, wherein the polyester resin has a molecular weight of 8000-1000 and a glass transition temperature of 70-85 ℃; the epoxy resin is alicyclic epoxy resin; the diluent is trimethylolpropane triglycidyl ether, butyl carbitol acetate, ethylene glycol monobutyl ether, alcohol ester dodeca or propylene glycol phenyl ether.

4. The heating slurry according to claim 2, wherein the organic vehicle A comprises the following components in percentage by mass: 25% of polyester resin, 5% of polyvinyl chloride and 70% of organic solvent B; the organic carrier B comprises the following components in percentage by mass: 70% of epoxy resin and 30% of diluent.

5. The heat-generating paste according to claim 2, wherein the mass ratio of the organic vehicle a to the organic vehicle B is organic vehicle a: organic vehicle B ═ 4: 1.

6. the heat-generating paste according to claim 1, wherein the curing agent is an isocyanate and a cationic initiator.

7. The heating paste as claimed in claim 1, wherein the organic solvent A is at least one of dibasic acid ester mixture DBE, diethylene glycol ethyl ether acetate, ethylene glycol butyl ether acetate, terpineol, butyl carbitol, ethylene glycol monobutyl ether, alcohol ester dodeca and propylene glycol phenyl ether.

8. The heat-generating paste according to claim 1, wherein the auxiliary agent includes a dispersant, a coupling agent, a leveling agent, and an antifoaming agent.

9. The heat-generating paste as claimed in claim 8, wherein the dispersant is at least one of BYK-431, BYK-163 and a dispersant 983; the coupling agent is at least one of KH-560, Z-6040 and TEGO 410; the leveling agent is at least one of BYK-354, Silok355 and DC-51; the defoaming agent is at least one of BYK-066N, DC62 and DC 163.

10. A method for preparing a heat-generating paste according to any one of claims 1 to 9, comprising the steps of:

(1) preparation of inorganic filler: taking graphene, graphite, cubic zirconium phosphate, nano tourmaline powder, wax powder and an auxiliary agent, and mixing and dispersing uniformly;

(2) adding the inorganic filler prepared in the step (1) into an organic carrier, uniformly mixing, grinding until the fineness of the slurry is less than 10 mu m to form a uniform mixed phase, and adding an organic solvent A to adjust the viscosity to be proper to obtain the slurry.

Technical Field

The invention relates to the technical field of resistance paste, in particular to heating paste and a preparation method thereof.

Background

The thick film heating element is a heating element in which a heating material is formed into a thick film on a substrate and is electrically heated. The existing widely used thick film resistance heating element has the advantages of beautiful appearance, high power, obvious heating effect, higher voltage resistance, mature process and obviously prolonged service life, is widely applied, replaces the original tubular heater with single shape, has wider heating range and makes up the problem of narrow heating range of the original PTC (Positive Temperature coefficient) heating element. Thick film resistors are being widely used as a new generation of resistors with their significant advantages.

Conventional thick film resistor pastes consist of three components, namely a functional phase, a binder phase and an organic vehicle as solvent. The functional phase is the key for reflecting the characteristics of the slurry and is a main research object; the adhesive phase plays a role in bonding, after high-temperature treatment, the organic carrier volatilizes, the adhesive phase is melted into liquid, and after cooling, the adhesive phase not only bonds the powder of the functional phase together, but also bonds the thick film and the substrate together; the organic vehicle is the part that must be used in the screen printing process.

The traditional thick film heating component mainly uses noble metal as a functional phase, and has higher cost, so the cost is high. At present, thick film heating elements are very expensive and difficult to popularize widely, and under the condition that the technology is mature, if the technology is developed continuously, cheaper alternative materials are required to be searched for further development.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides heating slurry and a preparation method thereof.

In order to achieve the purpose, the invention adopts the technical scheme that: the heating slurry comprises the following preparation raw materials in percentage by mass:

15-20% of graphite;

1-5% of graphene;

cubic zirconium phosphate 0.5-1.25%;

0.5 to 1.25 percent of nano tourmaline powder;

0 to 0.5 percent of wax powder;

55-65% of organic carrier;

0.5 to 1 percent of curing agent;

0.1 to 1 percent of auxiliary agent;

10-15% of organic solvent A.

As a preferred embodiment of the heat-generating paste according to the present invention, the organic vehicle includes an organic vehicle a and an organic vehicle B;

the preparation method of the organic carrier A comprises the following steps: mixing straight-chain polyester resin with a benzene ring structure, polyvinyl chloride and an organic solvent B to completely dissolve the polyester resin to obtain an organic carrier A;

the preparation method of the organic carrier B comprises the following steps: and mixing the epoxy resin with the hydroxyl-containing aliphatic reactive diluent to obtain an organic carrier B.

As a preferred embodiment of the heat-generating paste, the molecular weight of the polyester resin is 8000-1000, and the glass transition temperature is 70-85 ℃; the epoxy resin is alicyclic epoxy resin; the diluent is trimethylolpropane triglycidyl ether, butyl carbitol acetate, ethylene glycol monobutyl ether, alcohol ester dodeca or propylene glycol phenyl ether.

As a preferred embodiment of the heat-generating paste of the present invention, the organic vehicle a comprises the following components by mass percent: 25% of polyester resin, 5% of polyvinyl chloride and 70% of organic solvent B; the organic carrier B comprises the following components in percentage by mass: 70% of epoxy resin and 30% of diluent.

In a preferred embodiment of the heat-generating paste according to the present invention, the mass ratio of the organic vehicle a to the organic vehicle B is: organic vehicle B ═ 4: 1.

as a preferred embodiment of the heat-generating paste of the present invention, the curing agent is isocyanate and a cationic initiator.

As a preferred embodiment of the heat-generating paste according to the present invention, the organic solvent a is at least one of a dibasic acid ester mixture DBE, diethylene glycol ethyl ether acetate, ethylene glycol butyl ether acetate, terpineol, butyl carbitol, ethylene glycol monobutyl ether, an alcohol ester dodeca, and propylene glycol phenyl ether.

As a preferred embodiment of the heat-generating paste according to the present invention, the auxiliary agent includes a dispersant, a coupling agent, a leveling agent, and an antifoaming agent.

As a preferable embodiment of the heat-generating paste of the present invention, the dispersant is at least one of BYK-431, BYK-163, and a dispersant 983; the coupling agent is at least one of KH-560, Z-6040 and TEGO 410; the leveling agent is at least one of BYK-354, Silok355 and DC-51; the defoaming agent is at least one of BYK-066N, DC62 and DC 163.

The invention also provides a preparation method of the heating slurry, which comprises the following steps:

(1) preparation of inorganic filler: taking graphene, graphite, cubic zirconium phosphate, nano tourmaline powder, wax powder and an auxiliary agent, and mixing and dispersing uniformly;

(2) adding the inorganic filler prepared in the step (1) into an organic carrier, uniformly mixing, grinding until the fineness of the slurry is less than 10 mu m to form a uniform mixed phase, and adding an organic solvent A to adjust the viscosity to be proper to obtain the slurry.

The invention has the beneficial effects that: the heating slurry and the preparation method thereof provided by the invention have the advantages that the preparation method is simple, the operation is convenient, the formula is reasonable, high-performance graphite is used as a raw material, the graphene is properly added, the internal resistance is high, the particle size distribution is uniform, the coating slurry is easy to print, the in-plane heat dissipation is excellent, the integral heating effect is good, the cubic zirconium phosphate has a self-adsorption function, the energy content is high, and the sterilization effect, the nano tourmaline powder self-emitting far infrared rays and the thermal infrared rays are beneficial to the body.

Detailed Description

The present invention will be described in further detail with reference to the following examples. This should not be understood as limiting the scope of the above-described subject matter of the present invention to the following examples. All the technologies realized based on the above contents of the present invention belong to the scope of the present invention.