The polycondensated resins have lighter color, the free phenol, compound bromide and alkalinity are lower.

制得的多元共缩聚树脂具有颜色浅 、 游离酚和可被溴化物含量低、碱性低等优点.

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We are lagging behind in sectors as product type, performance and content of free phenol.

我国热塑性酚醛树脂的生产与国外相比差距较大,主要表现在品种单一, 性能差和游离酚含量高等.

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