In the application of non-stick coatings in household appliances such as flat-bottomed frying pans, rice cookers, ovens, and range hoods, the coating must withstand long-term high-temperature use and possess excellent scratch resistance (≥5H), while also maintaining good adhesion and thickness during the high-temperature curing process. Although traditional polyester resins have high gloss, they lack sufficient heat resistance, and pure silicone resins have good heat resistance but difficulty in balancing hardness and toughness. Polyester-modified silicone resin 6072A combines the high gloss of polyester and the high-temperature resistance of silicone resin, with a hardness of ≥5H after complete curing and a solid content of up to 59±1%, making it a candidate base material for household appliance temperature-resistant non-stick and decorative coatings. However, it must undergo systematic verification through the curing process, spraying parameters, and supporting systems.


Why do the performance of household appliance non-stick coatings often suffer from defects during high-temperature use or processing?


Failure to strictly follow the complete curing conditions (250℃×20min or 280℃×10min) results in insufficient crosslinking density, decreased hardness and heat resistance.


Improper control of the construction viscosity of the high-solid content (59±1%) system affects the leveling and appearance of the coating.


The PMA solvent evaporation gradient does not match, leading to pinholes or orange peel defects on the surface of the paint film.


Inappropriate design of coating thickness results in solvent retention during the curing process when the coating is too thick, or insufficient hardness when it is too thin.


Insufficient base material treatment (oil removal, sandblasting roughness) affects the adhesion of the coating.


The resin system with an acid value of 4-8mgKOH/g requires verification of compatibility with pigments and fillers.


The relationship between curing conditions and performance


Curing method Conditions Applicable scenarios Performance characteristics
Complete curing 250℃×20min Standard baking process Hardness ≥5H, high gloss
Fast curing 280℃×10min High-efficiency production line Hardness ≥5H, high gloss
Insufficient curing Temperature/time below recommended values Not recommended Hardness decreases, heat resistance insufficient
Which conditions need to be confirmed before selection and construction?


Condition category Information to be confirmed
Curing equipment Whether it has the ability to bake at 250-280℃ and temperature uniformity
Construction method Spraying, brushing, immersion coating, etc., spraying parameters
Base material type Metal (aluminum, stainless steel, cold-rolled steel, etc.) and pre-treatment method
Solvent system PMA dilution ratio, construction viscosity control
Coating requirements Meaning of film thickness, appearance (gloss, fullness), hardness (≥5H)
Application scenarios Frying pans, rice cookers, ovens, range hoods, etc.
Performance goals Temperature-resistant non-stick, heat resistance, scratch resistance, corrosion resistance
Which key indicators need to be verified?


Verification items Primary function Not replaceable content
Curing hardness (≥5H) Verify curing degree and scratch resistance Hardness达标 does not mean non-stick performance is qualified
Coating appearance (gloss， fullness) Assess decorative effect Re-evaluate after high-temperature use
Adhesion Assess interface bonding quality Re-test after high-temperature use
Non-stick performance Verify functional requirements Testing under actual cooking conditions is necessary
Heat resistance test Confirm stability under appliance usage temperature Combined with actual working conditions
Common misunderstandings


Low-temperature long-term curing can replace high-temperature short-term curing
The curing of 6072A depends on a specific temperature-time window， 250℃×20min or 280℃×10min are recommended complete curing conditions. Low-temperature curing may not achieve the designed performance.


Hardness ≥5H coating is necessarily scratch-resistant
High hardness is the basis for scratch resistance， but the toughness of the coating also affects the actual scratch resistance performance. It is necessary to verify with specific applications.


PMA solvent can be replaced arbitrarily
It is recommended to use PMA as the solvent. Replacing other solvents requires re-verification of solubility and evaporation gradient.


Recommended selection steps


Confirm whether the curing equipment meets the curing requirements of 250-280℃.


Adjust the construction viscosity according to the construction method. It is recommended to use PMA as the diluent.


Verify the appearance (luster, fullness) and hardness (≥5H) of the coating on the sample.


Conduct adhesion tests and temperature resistance verification.


Carry out non-stick performance and durability tests based on the specific usage conditions of household appliances.


Optimize the construction parameters and coating design based on the verification results.


FAQ


What are the complete curing conditions for IOTA 6072A?
250℃ for 20 minutes or 280℃ for 10 minutes. The hardness after curing should be ≥ 5H.


What are the main application fields of this product?
It is recommended to be used as a temperature-resistant non-stick coating for household appliances such as flat-bottom frying pans, rice cookers, ovens, baking ovens, toaster ovens, electric irons, range hoods, gas stoves, etc., and as a basic resin for special decorative coatings.


What does ≥5H hardness mean?
A hardness of ≥5H on a pencil scale is currently the highest hardness level in industrial protective and decorative coatings, indicating that the coating has excellent scratch resistance and wear resistance, and can withstand the friction and cleaning during the daily use of household appliances.


Why is PMA recommended as the solvent?
PMA (propylene glycol methyl ether acetate) is the matching solvent for this resin system, with good solubility and volatility gradient, which helps to obtain a uniform coating.