中性松香施胶剂的制备及施胶特性

摘要

本研究制备了多种烃基松香酯-松香施胶剂及松香甘油酯-松香施胶剂,并对其在中、碱性造纸施胶中的应用进行了探讨.施胶结果表明,松香甘油酯-松香施胶剂能有效地用于中、碱性施胶,然而其它烃基松香酯-松香施胶剂在同样条件下却无施胶效果,这意味着中性松香施胶剂的制备及性能并非完全取决于松香羧基的改性而是与松香酯的结构有关.虽然碱性填料碳酸钙的添加引起一定程度的施胶效果的下降,松香甘油酯-松香中性施胶剂在含有碳酸钙20%以上的施胶体系中仍显示出了极佳的施胶性能.%Several alkyl rosin ester-rosin sizes and glycerin rosin ester-rosin size were prepared and used for paper sizing under neutral-alkaline conditions.The sizing results indicated that the glycerin rosin ester-rosin size could be quite effectively used in neutral-alkaline paper sizing whereas the alkyl rosin ester-rosin sizes lost the sizing efficiency,implying that the preparation of neutral rosin sizes would not depend only on the simple modification of carboxyl groups in rosin acids but relate to the structure of rosin ester.Although the addition of alkaline filler CaCO3 decreased its sizing efficiency,the glycerin rosin ester-rosin size exhibited good sizing even applied in the pulp suspension containing about 20% alkaline filler.