Material Analysis
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Substandard Weather Resistance of Modified Acrylate-Epoxy-Phosphate-Distyrene Copolymer
Problem Phenomenon
The weather resistance of modified acrylate-epoxy-phosphate-distyrene copolymer is substandard, and after outdoor use, yellowing, embrittlement, or significant performance decline occurs
Cause Analysis
No ultraviolet absorber is added or the addition amount is insufficient
The antioxidant system is imperfect
The ultraviolet absorber has poor compatibility with the acrylate-epoxy-phosphate-distyrene copolymer
The antioxidant is consumed and degraded during processing
The formulation design is unreasonable
Solution
Add an appropriate amount of ultraviolet absorber (0.2-0.5%)
Improve the antioxidant system with the combination of primary/secondary antioxidants
Select a UV absorber with good compatibility
Avoid high-temperature degradation of antioxidants during processing
Optimize the formulation design
Key Takeaway
Weather resistance needs to be addressed from UV absorbers and antioxidants
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