申请人:ARIZONA CHEMICAL COMPANY
公开号:EP1642948A2
公开(公告)日:2006-04-05
Rosin esters that are both light colored and color stable are produced by reacting polyhydric alcohol with an equivalent excess of rosin, in the presence of calcium bis(monoethyl(3,5-di-tert-butly-4-hydroxybenzyl)phoshonate. As used herein, "reacting" means to contact the reactants under conditions of time, temperature, pressure, etc., effective to achieve the desired reaction, e.g., an esterification reaction. When phosphinic acid is added to the reaction mixture, light colored and color stable rosin esters are produced regardless of whether the rosin or polyol are in equivalent excess, although preferably the rosin is in equivalent excess. It is preferred to include a phenol sulphide compound, such as Vultac® 2, with the calcium bis(monoethyl(3,5-di-tert-butyl-4-hydroxybenzyl)phosphanate, and to add the phosphinic acid incrementally after the acid number of the rosin and polyhydric alcohol reaction mixture has dropped to about 100. Excess rosin is preferably stripped from the product mixture at about 275°C.
在双(单乙基(3,5-二叔丁基-4-羟基苄基)辛酸钙的存在下,通过使多羟基乙醇与等量过量的松香反应,可制得浅色且颜色稳定的松香酯。如本文所用,"反应 "是指在时间、温度、压力等条件下,使反应物接触,以实现所需的反应,如酯化反应。当向反应混合物中加入膦酸时,无论松香或多元醇是否等量过量,都会生成浅色且颜色稳定的松香酯,但松香最好等量过量。最好在双(3,5-二叔丁基-4-羟基苄基)膦酸钙中加入苯酚硫化物化合物,如 Vultac® 2,并在松香和多元醇反应混合物的酸值降至约 100 后逐步加入膦酸。多余的松香最好在约 275°C 的温度下从产品混合物中剥离。