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Coating composition, preparation method and application thereof

A composition and coating technology, which can be used in coatings, devices for coating liquids on surfaces, pre-treatment surfaces, etc., to solve the problems of poor corrosion resistance, poor non-stickiness, brittle cracking and chalking of coatings

Inactive Publication Date: 2009-09-16
科慕有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, although PTFE coatings have good non-stick properties, good hardness and wear resistance, the coatings formed by them have poor corrosion resistance and are easily penetrated by water vapor, resulting in corrosion and blistering of the substrate.
In addition, although the non-stick ceramic coating is relatively hard and has good heat resistance, it is easy to be brittle and powdered, has a short service life, and has poor non-stick properties.

Method used

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  • Coating composition, preparation method and application thereof
  • Coating composition, preparation method and application thereof
  • Coating composition, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Embodiment 1: abrasion resistance test

[0090] The abrasion resistance of the PFA two-layer non-stick coating of the present invention was compared with the conventional PTFE two-layer non-stick coating using the DuPont SBAR coating abrasion resistance test (based on British Standard Test Method BS7069:1988).

[0091] The wear resistance test of the DuPont SBAR coating is as follows:

[0092] Test purposes:

[0093] This method is mainly used to test the abrasion resistance of non-stick coatings on cookware during cooking.

[0094] Test principle:

[0095] Fix a specific friction pad under the arm bar perpendicular to the surface of the coating, reciprocate horizontally on the surface of the coating with a certain load force, and rub the surface of the coating until the coating is worn through and the substrate is exposed. Record the number of reciprocations used.

[0096] Test equipment and appliances:

[0097] (1) DuPont SBAR abrasion resistance tester: ...

Embodiment 2

[0119] Embodiment 2: anticorrosion test

[0120] Using the salt water corrosion resistance test (B.S7069 British Standard) method, the corrosion resistance of the PFA two-layer non-stick coating of the present invention was compared with the conventional PTFE two-layer non-stick coating.

[0121] The salt water corrosion resistance test is as follows:

[0122] Test purposes:

[0123] Used to test the corrosion resistance of non-stick coatings.

[0124] Test principle:

[0125] The paint system was boiled in 10% sodium chloride (brine) for 24 hours.

[0126] Test Instruments:

[0127] (1) Heating heat source (electric furnace)

[0128] (2) 10% sodium chloride solution

[0129] (3) Deionized water

[0130] Test preparation:

[0131] (1) Prepare the test sample, dry and bake the specified coating system.

[0132] (2) A certain amount of table salt is dissolved in a certain amount of deionized water to obtain a 10% by weight salt solution.

[0133] (3) Prepare ...

Embodiment 3

[0165] Embodiment 3: surface gloss test

[0166] The surface gloss test was carried out with a Gardner micro-tri-gloss gloss tester from BYK Company of Germany, and the refraction angle was selected to be 60 degrees. The larger the value, the better the surface gloss.

[0167] The results are shown in Table 1 below.

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PUM

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Abstract

The invention relates to a coating composition, a preparation method and an application thereof. The coating composition comprises (a) priming paint which consists of (i) fluor resin, (ii) inorganic filler and (iii) bonding resin, and (b) surface layer coating. The fluor resin is selected from polytetrafluoroe thylene resin, tetrafluoroethylene-perfluorinated alkey vinye copolymer, fluorinated ethylene propylene copolymer and combinations thereof, with a content of 30 to 70 parts by weight, calculated by the total solid weight of the priming paint; the inorganic filler has a grain size of 0.1 to 50 microns and a content of 5 to 30 parts by weight, calculated by the total solid weight of the priming paint; the bonding resin is selected from daiamid-imide copolymer, polyimide, polyphenylene sulfide, polyethersulfone and combinations thereof, with a content of 10-40 parts by weight, calculated by the total solid weight of the priming paint; the surface layer coating comprises (i') tetrafluoroethylene-perfluorinated alkey vinye copolymer with a content of 80-100 parts by weight, calculated by the total solid weight of the surface layer coating; (ii') assisted film forming organic resin with a content of 0-20 parts by weight, calculated by the total solid weight of the surface layer coating; and (iii') mica flashlight powder with a content of 0-3 parts by weight, calculated by the total solid weight of the surface layer coating.

Description

technical field [0001] The invention relates to the field of coatings, and provides a coating composition, a preparation method thereof, and an application on cookware. Background technique [0002] At present, non-stick cookware sold on the market mainly uses non-stick ceramic coatings and polytetrafluoroethylene (PTFE) coatings as non-stick coatings, and its appearance is basically a single color plus some flash powder. [0003] Non-stick coatings for non-stick cookware reported in prior art literature use PTFE as the main component, other components such as tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) and fluorinated ethylene propylene copolymer (FEP ) as an added ingredient, the performance of the coating is determined by the performance of PTFE. [0004] For example, CN 1064292A discloses a non-stick coating system comprising an undercoat and an overcoat, wherein the overcoat contains more than 40% by weight of PTFE as a main component; CN 1447749A di...

Claims

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Application Information

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IPC IPC(8): C09D127/18C09D7/12B05D1/38B05D3/02C09D179/08C09D181/00
Inventor 尹朝明
Owner 科慕有限公司
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