Products | Application of Sinochem Fubia antioxidants and UV absorbers in powder coatings
Release time:
2026-06-05
Sinochem Fubia is a professional additive company under Sinochem International. Its antioxidants and ultraviolet absorbers are suitable for the entire life cycle of powder coatings including thermal oxygen stabilization, outdoor weather resistance, anti-yellowing, covering production, curing, and long-term use.
1. Aging pain points of powder coatings and action mechanism of additives
01 Core aging problem
Thermal oxygen aging: extrusion/mixing/high-temperature curing (180–220°C) causes resin chain scission, yellowing, gloss loss, and mechanical property degradation.
Photooxidative aging: Outdoor UV (280–400nm) triggers a free radical chain reaction, leading to loss of gloss, powdering, cracking, fading, and yellowing of the coating.
Synergistic failure: It is difficult for a single additive to solve the multi-dimensional aging of heat/light/oxygen at the same time, and requires compounding to increase efficiency.
02 Mechanism of action of Fubia additives
Antioxidants (thermal oxygen protection)
Main antioxidant (hindered phenols): captures free radicals, terminates chain reactions, and inhibits thermal oxygen degradation and yellowing.
Auxiliary antioxidants (phosphites/thioethers): decompose peroxides, reduce hydroperoxides, and cooperate with the main antioxidants to improve thermal stability.
UV absorbers (photoprotection)
Benzophenones: absorb in the band 290–350nm, convert into heat energy, and are suitable for general outdoor scenarios.
Function: Block UV direct damage to resin, delay photo-oxidation, and preserve color and gloss.
2. Compatibility of Fubia’s core products with powder coatings
01 Antioxidant series
Hindered phenol main antioxidant ECOSCINOX 1010, ECOSCINOX 1076; low-volatility, heat-resistant, anti-yellowing general-purpose polyester/epoxy powder, high-temperature curing system.
Phosphite auxiliary antioxidants ECOSCINOX 168 and ECOSCINOX 626; decompose peroxide, synergize extrusion/curing high-temperature protection, and inhibit thermal yellowing.
02 UV absorber series (for powder only)
Benzophenone UV-531; light color, good compatibility, small migration, general outdoor use, opaque powder.
3. Application scheme in powder coatings
01 Production and processing stage (extrusion/mixing/crushing)
Core needs:
Inhibits thermo-oxidative degradation at high temperatures (100–130°C), prevents yellowing, preserves resin activity, and improves crushing fluidity.
Recipe plan:
The main antioxidant (1010) is added in an amount of 0.1–0.3% + the auxiliary antioxidant (168) is added in an amount of 0.1–0.2% to synergistically inhibit thermal yellowing.
02 High temperature curing stage (180–220℃, 10–20min)
Core needs:
Inhibit curing thermal oxidative aging, maintain gloss, prevent yellowing, and increase cross-linking degree.
Recipe plan
General system:
Hindered phenol + phosphite compound, total addition 0.2-0.5%.
High temperature/long time cure:
Hindered phenol + phosphite compound + a small amount of UV absorber (UV-531 added 0.1–0.3%), double protection.
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Contact Information
E-mail:hy@haiyi21cn.com
Address: East Block, 3rd Floor, Mid-term Building, 2000 Zhongshan North Road, Putuo District, Shanghai
Hotline:
400-088-7155
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E-mail:hy@haiyi21cn.com
Address: East Block, 3rd Floor, Mid-term Building, 2000 Zhongshan North Road, Putuo District, Shanghai
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