A light colour 422 resin with high softening point and reasonable acid value was synthesized directly from pine oleoresin.
以松脂为原料直接合成一种色泽浅、软化点高、酸值合格的4 2 2树脂。
The polyester resin synthesized by the said invented method is high in glass state temperature, high in softening point, good in storage stability and its weatherability is raised.
本发明所述方法合成的聚酯树脂玻璃化温度高，软化点高，贮存稳定性好，耐候性提高。
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