Low-temperature curing powder coating composition and coating thereof

By using a low-temperature curing powder coating composition consisting of polyester resin with an acid value range of 20-50 mg KOH/g, curing agent TGIC, non-fluorinated texturer, and bentonite, the problems of excessive fluorine content and poor texture effect in existing thermosetting powder coatings under low-temperature curing conditions are solved, and a coating with low fluorine content and excellent texture effect is achieved.

CN121610160APending Publication Date: 2026-03-06TIGER DRYLAC TAICANG +1
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Patent Information

Application Number
CN202511996240.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-26
Publication Date
2026-03-06

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Abstract

The invention discloses a low-temperature curing powder coating composition and a coating thereof. The low-temperature curing powder coating composition comprises polyester resin with an acid value range of 20-50mgKOH / g, a curing agent, a non-fluorine texturing agent and bentonite, the total fluorine content of the low-temperature curing powder coating composition tested according to an EN14582-2016 method is less than or equal to 50 mg / kg, more preferably less than or equal to 20 mg / kg; the low-temperature curing powder coating composition provided by the invention can replace an existing product based on a fluorine-containing additive (generally a PTFE (polytetrafluoroethylene) sand texture agent), not only ensures that the total fluorine content is not greater than 50ppm, but also can realize a target texture effect of a coating under a low-temperature curing condition.
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