Water-based non-stick polyether sulphone coating containing no perfluorooctanoic acid and method for preparing same

A technology of non-stick coatings and perfluorooctanoic acid, applied in coatings, latex paints, etc.

Active Publication Date: 2009-09-09
INNOTEK TECH CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the CN1069336C patent, a high- and low-temperature sintered polyethersulfone anti-stick coating for cooking utensils and household appliances is proposed. The low temperature mentioned in the patent refers to 280 ° C, and the high temperature refers to 380 ° C. The disadvantage of this patent is that this coating The solvent and diluent used are organic solvents such as N-methylpyrrolidone, butanone or acetone, toluene, xylene, dimethylacetamide, etc.
Its disadvantage is that the solvent and diluent used are also organic solvents
Its disadvantage is that the polytetrafluoroethylene used in this patent is in the form of emulsion

Method used

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  • Water-based non-stick polyether sulphone coating containing no perfluorooctanoic acid and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0091] A kind of preparation method of waterborne polyethersulfone non-stick coating of the present invention, comprises the steps:

[0092] The composition of the present invention is ground for 30-40 hours to obtain the water-based polyethersulfone non-stick coating.

[0093] In a specific embodiment of the present invention, the grinding includes two or more stages,

[0094] In the first stage, 8-25wt% polyethersulfone and 40-90wt% aqueous dispersion are ground for 24-30 hours to obtain a ground polyethersulfone grinding liquid,

[0095] In the second stage, the polyethersulfone grinding liquid obtained in the first stage is mixed with the following components:

[0096] 2-15wt% fluorocarbon polymer without perfluorooctanoic acid, 0-20wt% coloring toner, optional 0.1-3wt% additives suitable for coloring toner,

[0097] The resulting mixture was milled for 6-10 hours to obtain the paint.

[0098] The present invention is an environment-friendly water-based polyethersulfone...

Embodiment 1

[0121] The present invention uses 80-mesh emery to roughen the electric rice cooker by light sandblasting. Then add appropriate water as the thinner of this paint, adjust to the appropriate spray viscosity, and then spray on the rice cooker base material, first preheat in an oven at 150°C-180°C for 3-5 minutes, and then put it in 380 ℃-400℃ oven, bake for 10-15min, after cooling, carry out various physical property tests.

[0122] Described coating composition formula is as follows table 1:

[0123] Table 1: Basic Paint Formulation 1

[0124] raw material

weight percentage (%)

Polyethersulfone①

14

PTFE micropowder②

8

N-Methylpyrrolidone

26

Ethylene glycol monobutyl ether

13

Rheological agent③

0.3

Titanium dioxide

8.3

carbon ink

0.4

Dispersant ④

0.1

Surfactant⑤

1.0

Anti-flowering agent⑥

0.1

distilled water

28.8

...

Embodiment 2

[0133] The preparation method and application method of this embodiment are the same as in Example 1, except that the formula is as follows in Table 2:

[0134] Table 2: Basic Paint Formulation 2

[0135] raw material

weight percentage (%)

Polyethersulfone①

17

PTFE micropowder②

6

Tetrafluoroethylene / hexafluoropropylene copolymer

(FEP)③

3

N-Methylpyrrolidone

27

Ethylene glycol monobutyl ether

13

Rheological agent④

0.4

carbon ink

1.6

Pearl powder

0.7

Water-based aluminum paste

1.5

Dispersant ⑤

0.5

Surfactant⑥

1.1

Anti-flowering agent⑦

0.1

distilled water

28.1

Total

100

[0136] Please refer to the performance examples for the physical property test data.

[0137] ① The degree of polymerization of polyethersulfone is 50, purchased from Gafone 3600RP of Gharda Chemicals in...

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Abstract

The invention discloses a water-based non-stick polyether sulphone coating composition containing no perfluorooctanoic acid. The composition comprises (1) 8 to 25 weight percent of polyether sulphone, (2) 2 to 15 weight percent of fluorocarbon polymer containing no perfluorooctanoic acid, (3) 40 to 90 weight percent of water-based dispersant and (4) 0 to 20 weight percent of toner for coloring. The coating composition adopts distilled water as a thinner in spraying, reduces the use amount of an organic solvent, meets the requirement of environmental protection, contains no perfluorooctanoic acid (PFOA), and achieves the requirement of harmlessness to a human body.

Description

technical field [0001] The invention relates to a coating composition and a preparation method thereof, in particular to an environment-friendly water-based polyethersulfone non-stick coating composition without perfluorooctanoic acid (PFOA) and its preparation. The coating composition is mainly used for the non-stick coating of the electric rice cooker, and can also be used for the non-stick coating of other cooking utensils. Background technique [0002] Polyethersulfone has good heat resistance, steam resistance, corrosion resistance, light color, colorability, non-toxicity and other characteristics. It is an excellent engineering plastic, so polyethersulfone can be used in non-stick coatings, as a coating Adhesive. [0003] However, at present, non-stick coatings based on polyethersulfone are used in the domestic rice cooker market, all of which are solvent systems, and organic solvents are completely used as dilution solvents. In order to solve the problem of environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D181/06C09D5/02C09D5/00C09D127/12
Inventor 林学佐陈冠青袁文洋钟迪克
Owner INNOTEK TECH CHINA
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