Material Analysis
4 조회수
Weather resistance of modified styrene-butadiene copolymer not meeting standards
문제 현상
The weather resistance of modified styrene-butadiene copolymer does not meet standards; after outdoor use, yellowing, embrittlement or obvious performance decline occurs
원인 분석
No ultraviolet absorber is added or the addition amount is insufficient
The antioxidant system is imperfect
The ultraviolet absorber has poor compatibility with styrene-butadiene copolymer
Antioxidants are consumed and degraded during processing
Formulation design is unreasonable
해결 방법
Add an appropriate amount of ultraviolet absorber (0.2-0.5%)
Improve the antioxidant system with primary/auxiliary antioxidant combination
Select UV absorbers with good compatibility
Avoid high-temperature degradation of antioxidants during processing
Optimize formulation design
핵심 요약
Weather resistance needs to be addressed from UV absorbers and antioxidants
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