Material Analysis
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Weather resistance of modified styrene-butadiene transparent resin (K resin) not up to standard
Problem Phenomenon
Weather resistance of modified styrene-butadiene transparent resin (K resin) is not up to standard; yellowing, embrittlement, or obvious performance decline after outdoor use
Cause Analysis
No ultraviolet absorber added or insufficient addition amount
Incomplete antioxidant system
Poor compatibility between ultraviolet absorber and styrene-butadiene transparent resin (K resin)
Antioxidant consumed and degraded during processing
Unreasonable formulation design
Solution
Add appropriate ultraviolet absorber (0.2-0.5%)
Improve the antioxidant system, main/auxiliary antioxidant coordination
Select UV absorbers with good compatibility
Avoid high-temperature degradation of antioxidants during processing
Optimize formulation design
Key Takeaway
Weather resistance needs to start from UV absorbers and antioxidants
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