Homopolymers and copolymers with high Tg's are produced from phthalazones which in turn are produced from phenolphthalein as a readily available starting material; the homopolymers may be represented by formula (IX): ##STR1## wherein R.sub.1 and R.sub.2, which may be the same or different, are selected from hydrogen, fluorine, phenyl and fluorophenyl, each m, which may be the same or different, is an integer of 0, 1, 2, 3 or 4, and n is an integer of 2 to 200. Novel phenyl substituted phenolphthaleins and novel hydroxybenzoylbenzoic acids, as well as novel phthalazones, all of which may be employed in the preparation of homopolymers and copolymers of the invention, are also provided.
高Tg的同聚物和共聚物是由邻
苯二
酮制成的,而邻
苯二
酮是由
苯酚酞作为易得的起始材料制成的;同聚物可以用式(IX)表示:##
STR1## 其中R.sub.1和R.sub.2(可以相同也可以不同)选自
氢、
氟、
苯基和
氟苯基,每个m(可以相同也可以不同)是0、1、2、3或4的整数,n是2到200的整数。还提供了新的
苯基取代的
苯酚酞和新的羟基
苯甲酰
苯甲酸以及新的邻
苯二
酮,所有这些都可以用于制备本发明的同聚物和共聚物。