CN-116948398-B - Composition and coating film

Abstract

The invention provides a composition and a coating film, wherein the composition can provide a coating film with excellent adhesion to a substrate and excellent non-sticking property. A composition comprising a fluororesin, a heat-resistant resin, water and a solvent having a boiling point of 205 ℃ or higher.

Inventors

• Tamura Youngwoo
• YAMAGUCHI KOTARO
• Bailian Hongdao
• City pill wisdom foreign

Assignees

• 大金工业株式会社

Dates

Publication Date

20260512

Application Date

20180223

Priority Date

20170307

Claims (12)

1. 1. A composition comprising a fluororesin, a heat-resistant resin, water and a solvent having a boiling point of 235 ℃ or higher, The mass ratio of the fluorine resin to the heat-resistant resin is 1/99-40/60, The total amount of the fluororesin and the heat-resistant resin is 20 to 50 mass% relative to the total amount of the fluororesin, the heat-resistant resin, the water and the solvent, The fluororesin is tetrafluoroethylene/hexafluoropropylene copolymer, The heat-resistant resin is polyarylene sulfide or polyethersulfone, The content of the solvent is 5 to 50 mass% relative to the total amount of the fluororesin, the heat-resistant resin, the water and the solvent.
2. 2. The composition of claim 1, wherein the solvent has a boiling point of 265 ℃ to 300 ℃.
3. 3. The composition according to claim 1 or2, wherein the solvent is at least one selected from the group consisting of diethylene glycol, triethylene glycol, tetraethylene glycol, glycerol, tripropylene glycol monomethyl ether, triethylene glycol monobutyl ether, polyethylene glycol monomethyl ether, tetraethylene glycol dimethyl ether, and polyethylene glycol dimethyl ether.
4. 4. The composition of claim 1 or 2, wherein the composition is a coating.
5. 5. The composition of claim 1 or 2, wherein the composition is a coating for a coating.
6. 6. A coating film formed from the composition of claim 1, 2, 3, 4 or 5.
7. 7. The coating film according to claim 6, wherein the coating film has an adhesion to rice cake of 15.0g/cm 2 or less as a result of a rice cake adhesion test.
8. 8. The coating film according to claim 6 or 7, wherein the result of the checkerboard test is 100/100.
9. 9. The coating film according to claim 7, wherein the adhesion to rice cake obtained by the rice cake adhesion test is 0.1g/cm 2 or more.
10. 10. A cooking device comprising the coating film according to claim 6.
11. 11. An electric cooker comprising a liner having the coating film of claim 6.
12. 12. A laminate comprising a substrate and the coating film according to claim 7 or 8 formed on the substrate.

Description

Composition and coating film The application is a divisional application, the application number of the application is 201880014949.3 in China, the application number of the international application is PCT/JP2018/006713, the application date is 2018, 02 and 23, and the date entering China is 2019, 08 and 30, and the application is named as a composition and a coating film. Technical Field The present invention relates to a composition and a coating film. Background In cooking devices such as frying pans, heating plates, pans, and inner liners of electric cookers, it is common to provide a metal base material such as aluminum or stainless steel with a coating layer made of a fluororesin excellent in heat resistance, non-stick property, stain resistance, and the like, in order to prevent scorching and adhesion of a cooking material during heating cooking. Patent document 1 proposes a composition for coating a fluororesin, which is characterized in that at least 3 components among a polyarylene sulfide resin, a polyamide-imide resin and/or a polyimide resin, and a fluororesin are dispersed in a liquid medium. Patent document 2 proposes a water-based composition for vulcanizing fluororubber, which comprises fluororubber, a fluororesin, a vulcanizing agent, and at least one additive selected from the group consisting of a surfactant having a decomposition residue of 0.3% by weight or less after heating at 300 ℃ for 30 minutes, and a polar solvent having a boiling point of 300 ℃ or less and a surface tension of 30dyne/cm or more at ordinary temperature. Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 53-74532 Patent document 2 International publication No. 00/53675 Disclosure of Invention Problems to be solved by the invention However, the conventional techniques cannot sufficiently achieve both adhesion between the coating film and the substrate and non-tackiness of the coating film. In view of the above-described circumstances, an object of the present invention is to provide a composition capable of providing a coating film having excellent adhesion to a substrate and excellent non-tackiness, and to provide the coating film. Means for solving the problems The present inventors have found that the above problems can be successfully solved by using a solvent having a boiling point in a specific range, and have completed the present invention. That is, the present invention relates to a composition comprising a fluororesin, a heat-resistant resin, water and a solvent having a boiling point of 205 ℃. The mass ratio of the fluororesin to the heat-resistant resin is preferably 1/99 to 40/60. The total amount of the fluororesin and the heat-resistant resin is preferably 20 to 50% by mass relative to the total amount of the fluororesin, the heat-resistant resin, the water and the solvent. The content of the solvent is preferably 5 to 50% by mass based on the total amount of the fluororesin, the heat-resistant resin, the water and the solvent. The fluororesin is preferably a melt-processible fluororesin. The heat-resistant resin is preferably polyarylene sulfide or polyethersulfone. The heat-resistant resin is preferably polyarylene sulfide or polyethersulfone and polyamideimide. The solvent is preferably at least one selected from the group consisting of diethylene glycol, triethylene glycol, tetraethylene glycol, glycerol, diethylene glycol monobutyl ether, tripropylene glycol monomethyl ether, triethylene glycol monobutyl ether, polyethylene glycol monomethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, polyethylene glycol dimethyl ether, and 1, 4-butanediol. The above composition is preferably a coating. The above composition is preferably a coating for a single coating. The invention also relates to a coating film formed by the composition. The present invention also relates to a cooking device comprising the above-mentioned coating film. The invention also relates to an electric cooker, which is provided with the inner container with the coating film. The present invention also relates to a coating film comprising a composition containing water, which comprises a fluororesin and a heat-resistant resin, and which has an adhesion to rice cake of 20.0g/cm 2 or less as measured by the rice cake adhesion test. The result of the above coating film preferably in a checkerboard test is 100/100. The present invention also relates to a laminate comprising a substrate and the coating film formed on the substrate. ADVANTAGEOUS EFFECTS OF INVENTION The composition of the present invention has the above-described constitution, and therefore can be directly applied to a substrate, and the obtained coating film is excellent in adhesion to the substrate and in non-tackiness. Thus, the coating composition of the present invention is useful as a coating for a coating layer. The coating film of the present invention has the above-described constitution, and th