They can also be used for fiber sizing , textile finishing , the reinforcing agent for cement and ceramics , and the preparation of various kinds of latex paints , and all kinds of special adhesion agents . the products of vinyl acetate - acrylic ester copolymer emulsion , which have overcome some defect of homopolymerized products , are newly developed . the modified emulsion has stronger water resistance , better flexibility , and lower glass state temperature 醋-丙共聚系列乳液产品是针对均聚产品的某些缺陷而发展起来的新胶种，它通过醋酸乙烯与丙烯酸脂类共聚改性，提高胶粘剂的耐水性和柔韧性，降低共聚物的玻璃化温度，使产品对一些均聚乳液难以粘接的材料具有良好的粘接性能，主要产品有：宝丽板胶铝箔纸胶塑板胶等。
Abstract : an imidazole - catalyzed acylation method of phthalic anhydride is applied to the determination of hydroxyl values of reinforcing agent is211 . the analytical error is 5 . 0 10 - 3 . the relative standard deviation of the method is less than 0 . 04 and its coefficient of variation is not more than 5 . 0 10 - 3 . hydroxyl values determined in different batch samples meet the design requirement completely . this method is rapid and simple , it is adaptable to conventional analysis 文摘:以咪唑催化邻苯二甲酸酐酰化的方法测定增强剂is211的羟值，准确度高，分析误差为5 . 0 10 - 3 ；方法精密度好，标准偏差小于0 . 4 ，变异系数不大于5 . 0 10 - 3 ，测定不同批号试样的羟值完全符合商标值，方法快速、简便，适用于常规分析。
