Thermochromic coating, preparation method thereof, heating device and cooking equipment

A technology for temperature-sensitive discoloration and heating appliances, which can be applied to coatings, devices for coating liquids on surfaces, special surfaces, etc.

Active Publication Date: 2020-01-10
FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem that the paint in the base coat of the thermochromic coating in the prior art is not uniformly heated, which af

Method used

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  • Thermochromic coating, preparation method thereof, heating device and cooking equipment
  • Thermochromic coating, preparation method thereof, heating device and cooking equipment
  • Thermochromic coating, preparation method thereof, heating device and cooking equipment

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preparation example Construction

[0052] The second aspect of the present invention provides a method for preparing a thermochromic coating, wherein the method comprises the following steps:

[0053] (1) substrate 1 is pretreated;

[0054] (II) roughening the substrate obtained through step (I);

[0055] (III) coating paint on the surface of the substrate obtained through step (II) and carrying out the first surface drying treatment to form the primer layer 2;

[0056] (IV) Coating a thermochromic decorative layer 3 on the base coat 2 and carrying out a second surface-drying treatment; and

[0057] (V) Coating a top coat 4 on the thermochromic decorative layer 3 and performing sintering treatment.

[0058] According to the present invention, in step (1), the substrate 1 is pretreated, wherein the pretreatment method includes carrying out degreasing and derusting treatment on the substrate 1, the method for deoiling and derusting is not particularly limited, and can be respectively Various methods commonly u...

Embodiment 1

[0078] This embodiment is used to illustrate the thermochromic coating prepared by the method of the present invention, as well as heating appliances and cooking equipment.

[0079] (1) Pretreat the base of the aluminum pan (thickness 2.5mm), the pretreatment method includes: a) degreasing at 55°C for 8 minutes; b) cleaning with deionized water; c) drying at 100°C 5min;

[0080] (2) Roughening treatment: d) Use 60-80 mesh brown steel grit to sandblast the inner surface of the aluminum pot base under the pressure of 0.6MPa jet airflow to make the surface roughness Ra3μm, and then use airflow (air) Blow off the remaining powder particles on the inner surface of the base of the pot body; e) use 40% by weight of NaOH solution for alkaline washing at 80°C for 1 minute; f) neutralize with 20% by weight of nitric acid solution for 3 minutes; g) use deionized After washing with water, dry at 300°C for 12 minutes;

[0081]On the inner surface of the substrate 1, a color lining layer ...

Embodiment 2

[0089] This embodiment is used to illustrate the thermochromic coating prepared by the method of the present invention, as well as heating appliances and cooking equipment.

[0090] The thermochromic coating is prepared according to the method of Example 1, the difference being that: the coating is specifically as shown in Table 1; the roughness Ra of the substrate surface obtained through step (2) is 3 μm; and

[0091] On the inner surface of the base 1, a color lining layer 31 is applied to a local area, and a primer layer 2 is applied to other areas, and a discoloration layer 32 is applied to a local area of ​​the upper surface of the color lining layer 31; and

[0092] In step (3), the conditions of the first surface drying treatment: the temperature is 150° C., and the time is 8 minutes;

[0093] In step (4), the conditions of the second surface drying treatment: the temperature is 100°C, and the time is 1min;

[0094] In step (5), the conditions of the sintering treatme...

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Abstract

The invention relates to the technical field of electric heating appliances and discloses a thermochromic coating, a preparation method of the thermochromic coating, a heating device and cooking equipment. The thermochromic coating comprises a priming coating, a thermochromic decorative layer and a finishing coating which are sequentially overlaid on a substrate. The priming coating contains adhesive resin, fluorine resin and powdery inorganic matter resistant to at least 200 DEG C, and the adhesive resin, the fluorine resin and the powdery inorganic matter resistant to at least 200 DEG C areevenly distributed in the priming coating. According to the thermochromic coating, the priming coating contains the high-temperature-resistant inorganic matter, the high-temperature-resistant inorganic matter can prevent the adhesive resin and the fluorine resin from flowing, gathering and clustering in the melting and firm-forming process and enables the adhesive resin and the fluorine resin to be more evenly distributed on the priming coating, and therefore color change of the thermochromic decorative layer is more sensitive.

Description

technical field [0001] The invention relates to the technical field of electric heating appliances, and discloses a thermochromic coating and a preparation method thereof, as well as heating appliances and cooking equipment. Background technique [0002] Heating appliances are common cooking utensils in people's kitchens, and because traditional heating appliances only rely on feeling or experience to judge the temperature when cooking food, especially stir-frying, it will cause the food oil inside to burn and deteriorate, which is not conducive to eating, and will also produce A large amount of oil fume pollutes the kitchen environment. [0003] An existing solution is that people have adopted a thermochromic coating to realize discoloration at high temperature and realize temperature indication. However, the bottom (base) coating of the existing thermochromic coating contains Binder resin and fluororesin, since both resins exist in the paint in a dispersed or suspended st...

Claims

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Application Information

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IPC IPC(8): B05D7/00B05D5/06C09D201/00C09D127/12C09D1/00C09D7/61
CPCB05D7/586B05D5/06C09D201/00C09D127/12C09D1/00C09D5/002C09D7/61B05D2506/10B05D2601/20B05D2420/01
Inventor 钟春发万鹏曹达华
Owner FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD
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