?八、解決方案決策樹(shù)?

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		graph TD
A[耐黃變需求] --> B{應(yīng)用場(chǎng)景}
B -->|戶(hù)外/食品包裝| C[脂肪族HDI/IPDI + PCDL多元醇]
B -->|成本敏感| D[脂環(huán)族H12MDI + 聚酯多元醇]
C --> E[添加UV吸收劑+HALS]
D --> F[復(fù)配抗氧化劑]
E --> G[工藝控制：≤85℃/氮保護(hù)]
F --> G
G --> H[成品Δb＜3.0]